drivers/s390/scsi/zfcp_dbf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Debug traces for zfcp.
   5  *
   6  * Copyright IBM Corporation 2002, 2008
   7  */
   8
   9 #include <linux/ctype.h>
  10 #include <asm/debug.h>
  11 #include "zfcp_ext.h"
  12
  13 static u32 dbfsize = 4;
  14
  15 module_param(dbfsize, uint, 0400);
  16 MODULE_PARM_DESC(dbfsize,
  17                  "number of pages for each debug feature area (default 4)");
  18
  19 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  20                              int level, char *from, int from_len)
  21 {
  22         int offset;
  23         struct zfcp_dbf_dump *dump = to;
  24         int room = to_len - sizeof(*dump);
  25
  26         for (offset = 0; offset < from_len; offset += dump->size) {
  27                 memset(to, 0, to_len);
  28                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  29                 dump->total_size = from_len;
  30                 dump->offset = offset;
  31                 dump->size = min(from_len - offset, room);
  32                 memcpy(dump->data, from + offset, dump->size);
  33                 debug_event(dbf, level, dump, dump->size);
  34         }
  35 }
  36
  37 /* FIXME: this duplicate this code in s390 debug feature */
  38 static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
  39 {
  40         unsigned long long sec;
  41
  42         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  43         sec = stck >> 12;
  44         do_div(sec, 1000000);
  45         time->tv_sec = sec;
  46         stck -= (sec * 1000000) << 12;
  47         time->tv_nsec = ((stck * 1000) >> 12);
  48 }
  49
  50 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  51 {
  52         int i;
  53
  54         *p += sprintf(*p, "%-24s", label);
  55         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  56                 *p += sprintf(*p, "%c", tag[i]);
  57         *p += sprintf(*p, "\n");
  58 }
  59
  60 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  61 {
  62         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  63 }
  64
  65 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  66 {
  67         va_list arg;
  68
  69         *buf += sprintf(*buf, "%-24s", s);
  70         va_start(arg, format);
  71         *buf += vsprintf(*buf, format, arg);
  72         va_end(arg);
  73         *buf += sprintf(*buf, "\n");
  74 }
  75
  76 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  77                           int buflen, int offset, int total_size)
  78 {
  79         if (!offset)
  80                 *p += sprintf(*p, "%-24s  ", label);
  81         while (buflen--) {
  82                 if (offset > 0) {
  83                         if ((offset % 32) == 0)
  84                                 *p += sprintf(*p, "\n%-24c  ", ' ');
  85                         else if ((offset % 4) == 0)
  86                                 *p += sprintf(*p, " ");
  87                 }
  88                 *p += sprintf(*p, "%02x", *buffer++);
  89                 if (++offset == total_size) {
  90                         *p += sprintf(*p, "\n");
  91                         break;
  92                 }
  93         }
  94         if (!total_size)
  95                 *p += sprintf(*p, "\n");
  96 }
  97
  98 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
  99                                 int area, debug_entry_t *entry, char *out_buf)
 100 {
 101         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 102         struct timespec t;
 103         char *p = out_buf;
 104
 105         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 106                 zfcp_dbf_timestamp(entry->id.stck, &t);
 107                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 108                              t.tv_sec, t.tv_nsec);
 109                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 110         } else  {
 111                 zfcp_dbf_outd(&p, NULL, dump->data, dump->size, dump->offset,
 112                               dump->total_size);
 113                 if ((dump->offset + dump->size) == dump->total_size)
 114                         p += sprintf(p, "\n");
 115         }
 116         return p - out_buf;
 117 }
 118
 119 /**
 120  * zfcp_hba_dbf_event_fsf_response - trace event for request completion
 121  * @fsf_req: request that has been completed
 122  */
 123 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 124 {
 125         struct zfcp_adapter *adapter = fsf_req->adapter;
 126         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 127         union fsf_prot_status_qual *prot_status_qual =
 128                                         &qtcb->prefix.prot_status_qual;
 129         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 130         struct scsi_cmnd *scsi_cmnd;
 131         struct zfcp_port *port;
 132         struct zfcp_unit *unit;
 133         struct zfcp_send_els *send_els;
 134         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 135         struct zfcp_hba_dbf_record_response *response = &rec->u.response;
 136         int level;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 140         memset(rec, 0, sizeof(*rec));
 141         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 142
 143         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 144             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 145                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 146                 level = 1;
 147         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 148                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 149                 level = 1;
 150         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 151                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 152                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 153                 level = 4;
 154         } else if (qtcb->header.log_length) {
 155                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
 156                 level = 5;
 157         } else {
 158                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 159                 level = 6;
 160         }
 161
 162         response->fsf_command = fsf_req->fsf_command;
 163         response->fsf_reqid = (unsigned long)fsf_req;
 164         response->fsf_seqno = fsf_req->seq_no;
 165         response->fsf_issued = fsf_req->issued;
 166         response->fsf_prot_status = qtcb->prefix.prot_status;
 167         response->fsf_status = qtcb->header.fsf_status;
 168         memcpy(response->fsf_prot_status_qual,
 169                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 170         memcpy(response->fsf_status_qual,
 171                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 172         response->fsf_req_status = fsf_req->status;
 173         response->sbal_first = fsf_req->sbal_first;
 174         response->sbal_last = fsf_req->sbal_last;
 175         response->sbal_response = fsf_req->sbal_response;
 176         response->pool = fsf_req->pool != NULL;
 177         response->erp_action = (unsigned long)fsf_req->erp_action;
 178
 179         switch (fsf_req->fsf_command) {
 180         case FSF_QTCB_FCP_CMND:
 181                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 182                         break;
 183                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 184                 if (scsi_cmnd) {
 185                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 186                         response->u.fcp.serial = scsi_cmnd->serial_number;
 187                 }
 188                 break;
 189
 190         case FSF_QTCB_OPEN_PORT_WITH_DID:
 191         case FSF_QTCB_CLOSE_PORT:
 192         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 193                 port = (struct zfcp_port *)fsf_req->data;
 194                 response->u.port.wwpn = port->wwpn;
 195                 response->u.port.d_id = port->d_id;
 196                 response->u.port.port_handle = qtcb->header.port_handle;
 197                 break;
 198
 199         case FSF_QTCB_OPEN_LUN:
 200         case FSF_QTCB_CLOSE_LUN:
 201                 unit = (struct zfcp_unit *)fsf_req->data;
 202                 port = unit->port;
 203                 response->u.unit.wwpn = port->wwpn;
 204                 response->u.unit.fcp_lun = unit->fcp_lun;
 205                 response->u.unit.port_handle = qtcb->header.port_handle;
 206                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 207                 break;
 208
 209         case FSF_QTCB_SEND_ELS:
 210                 send_els = (struct zfcp_send_els *)fsf_req->data;
 211                 response->u.els.d_id = qtcb->bottom.support.d_id;
 212                 response->u.els.ls_code = send_els->ls_code >> 24;
 213                 break;
 214
 215         case FSF_QTCB_ABORT_FCP_CMND:
 216         case FSF_QTCB_SEND_GENERIC:
 217         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 218         case FSF_QTCB_EXCHANGE_PORT_DATA:
 219         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 220         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 221                 break;
 222         }
 223
 224         debug_event(adapter->hba_dbf, level, rec, sizeof(*rec));
 225
 226         /* have fcp channel microcode fixed to use as little as possible */
 227         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 228                 /* adjust length skipping trailing zeros */
 229                 char *buf = (char *)qtcb + qtcb->header.log_start;
 230                 int len = qtcb->header.log_length;
 231                 for (; len && !buf[len - 1]; len--);
 232                 zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
 233                                  buf, len);
 234         }
 235
 236         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 237 }
 238
 239 /**
 240  * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
 241  * @tag: tag indicating which kind of unsolicited status has been received
 242  * @adapter: adapter that has issued the unsolicited status buffer
 243  * @status_buffer: buffer containing payload of unsolicited status
 244  */
 245 void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 246                                   struct fsf_status_read_buffer *status_buffer)
 247 {
 248         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 249         unsigned long flags;
 250
 251         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 252         memset(rec, 0, sizeof(*rec));
 253         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 254         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 255
 256         rec->u.status.failed = atomic_read(&adapter->stat_miss);
 257         if (status_buffer != NULL) {
 258                 rec->u.status.status_type = status_buffer->status_type;
 259                 rec->u.status.status_subtype = status_buffer->status_subtype;
 260                 memcpy(&rec->u.status.queue_designator,
 261                        &status_buffer->queue_designator,
 262                        sizeof(struct fsf_queue_designator));
 263
 264                 switch (status_buffer->status_type) {
 265                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 266                         rec->u.status.payload_size =
 267                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 268                         break;
 269
 270                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 271                         rec->u.status.payload_size =
 272                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 273                         break;
 274
 275                 case FSF_STATUS_READ_LINK_DOWN:
 276                         switch (status_buffer->status_subtype) {
 277                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 278                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 279                                 rec->u.status.payload_size =
 280                                         sizeof(struct fsf_link_down_info);
 281                         }
 282                         break;
 283
 284                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 285                         rec->u.status.payload_size =
 286                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 287                         break;
 288                 }
 289                 memcpy(&rec->u.status.payload,
 290                        &status_buffer->payload, rec->u.status.payload_size);
 291         }
 292
 293         debug_event(adapter->hba_dbf, 2, rec, sizeof(*rec));
 294         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 295 }
 296
 297 /**
 298  * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
 299  * @adapter: adapter affected by this QDIO related event
 300  * @qdio_error: as passed by qdio module
 301  * @sbal_index: first buffer with error condition, as passed by qdio module
 302  * @sbal_count: number of buffers affected, as passed by qdio module
 303  */
 304 void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
 305                              unsigned int qdio_error, int sbal_index,
 306                              int sbal_count)
 307 {
 308         struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
 309         unsigned long flags;
 310
 311         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 312         memset(r, 0, sizeof(*r));
 313         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 314         r->u.qdio.qdio_error = qdio_error;
 315         r->u.qdio.sbal_index = sbal_index;
 316         r->u.qdio.sbal_count = sbal_count;
 317         debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
 318         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 319 }
 320
 321 static void zfcp_hba_dbf_view_response(char **p,
 322                                        struct zfcp_hba_dbf_record_response *r)
 323 {
 324         struct timespec t;
 325
 326         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 327         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 328         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 329         zfcp_dbf_timestamp(r->fsf_issued, &t);
 330         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 331         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 332         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 333         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 334                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 335         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 336                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 337         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 338         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 339         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 340         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
 341         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 342
 343         switch (r->fsf_command) {
 344         case FSF_QTCB_FCP_CMND:
 345                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 346                         break;
 347                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
 348                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
 349                 break;
 350
 351         case FSF_QTCB_OPEN_PORT_WITH_DID:
 352         case FSF_QTCB_CLOSE_PORT:
 353         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 354                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
 355                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
 356                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 357                 break;
 358
 359         case FSF_QTCB_OPEN_LUN:
 360         case FSF_QTCB_CLOSE_LUN:
 361                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
 362                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
 363                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
 364                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 365                 break;
 366
 367         case FSF_QTCB_SEND_ELS:
 368                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
 369                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
 370                 break;
 371
 372         case FSF_QTCB_ABORT_FCP_CMND:
 373         case FSF_QTCB_SEND_GENERIC:
 374         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 375         case FSF_QTCB_EXCHANGE_PORT_DATA:
 376         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 377         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 378                 break;
 379         }
 380 }
 381
 382 static void zfcp_hba_dbf_view_status(char **p,
 383                                      struct zfcp_hba_dbf_record_status *r)
 384 {
 385         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 386         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 387         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 388         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 389                       sizeof(struct fsf_queue_designator), 0,
 390                       sizeof(struct fsf_queue_designator));
 391         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 392                       r->payload_size);
 393 }
 394
 395 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
 396 {
 397         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 398         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 399         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 400 }
 401
 402 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
 403                                     char *out_buf, const char *in_buf)
 404 {
 405         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
 406         char *p = out_buf;
 407
 408         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 409                 return 0;
 410
 411         zfcp_dbf_tag(&p, "tag", r->tag);
 412         if (isalpha(r->tag2[0]))
 413                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 414
 415         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 416                 zfcp_hba_dbf_view_response(&p, &r->u.response);
 417         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 418                 zfcp_hba_dbf_view_status(&p, &r->u.status);
 419         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 420                 zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
 421
 422         p += sprintf(p, "\n");
 423         return p - out_buf;
 424 }
 425
 426 static struct debug_view zfcp_hba_dbf_view = {
 427         "structured",
 428         NULL,
 429         &zfcp_dbf_view_header,
 430         &zfcp_hba_dbf_view_format,
 431         NULL,
 432         NULL
 433 };
 434
 435 static const char *zfcp_rec_dbf_tags[] = {
 436         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 437         [ZFCP_REC_DBF_ID_TARGET] = "target",
 438         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 439         [ZFCP_REC_DBF_ID_ACTION] = "action",
 440 };
 441
 442 static const char *zfcp_rec_dbf_ids[] = {
 443         [1]     = "new",
 444         [2]     = "ready",
 445         [3]     = "kill",
 446         [4]     = "down sleep",
 447         [5]     = "down wakeup",
 448         [6]     = "down sleep ecd",
 449         [7]     = "down wakeup ecd",
 450         [8]     = "down sleep epd",
 451         [9]     = "down wakeup epd",
 452         [10]    = "online",
 453         [11]    = "operational",
 454         [12]    = "scsi slave destroy",
 455         [13]    = "propagate failed adapter",
 456         [14]    = "propagate failed port",
 457         [15]    = "block adapter",
 458         [16]    = "unblock adapter",
 459         [17]    = "block port",
 460         [18]    = "unblock port",
 461         [19]    = "block unit",
 462         [20]    = "unblock unit",
 463         [21]    = "unit recovery failed",
 464         [22]    = "port recovery failed",
 465         [23]    = "adapter recovery failed",
 466         [24]    = "qdio queues down",
 467         [25]    = "p2p failed",
 468         [26]    = "nameserver lookup failed",
 469         [27]    = "nameserver port failed",
 470         [28]    = "link up",
 471         [29]    = "link down",
 472         [30]    = "link up status read",
 473         [31]    = "open port failed",
 474         [32]    = "open port failed",
 475         [33]    = "close port",
 476         [34]    = "open unit failed",
 477         [35]    = "exclusive open unit failed",
 478         [36]    = "shared open unit failed",
 479         [37]    = "link down",
 480         [38]    = "link down status read no link",
 481         [39]    = "link down status read fdisc login",
 482         [40]    = "link down status read firmware update",
 483         [41]    = "link down status read unknown reason",
 484         [42]    = "link down ecd incomplete",
 485         [43]    = "link down epd incomplete",
 486         [44]    = "sysfs adapter recovery",
 487         [45]    = "sysfs port recovery",
 488         [46]    = "sysfs unit recovery",
 489         [47]    = "port boxed abort",
 490         [48]    = "unit boxed abort",
 491         [49]    = "port boxed ct",
 492         [50]    = "port boxed close physical",
 493         [51]    = "port boxed open unit",
 494         [52]    = "port boxed close unit",
 495         [53]    = "port boxed fcp",
 496         [54]    = "unit boxed fcp",
 497         [55]    = "port access denied",
 498         [56]    = "",
 499         [57]    = "",
 500         [58]    = "",
 501         [59]    = "unit access denied",
 502         [60]    = "shared unit access denied open unit",
 503         [61]    = "",
 504         [62]    = "request timeout",
 505         [63]    = "adisc link test reject or timeout",
 506         [64]    = "adisc link test d_id changed",
 507         [65]    = "adisc link test failed",
 508         [66]    = "recovery out of memory",
 509         [67]    = "adapter recovery repeated after state change",
 510         [68]    = "port recovery repeated after state change",
 511         [69]    = "unit recovery repeated after state change",
 512         [70]    = "port recovery follow-up after successful adapter recovery",
 513         [71]    = "adapter recovery escalation after failed adapter recovery",
 514         [72]    = "port recovery follow-up after successful physical port "
 515                   "recovery",
 516         [73]    = "adapter recovery escalation after failed physical port "
 517                   "recovery",
 518         [74]    = "unit recovery follow-up after successful port recovery",
 519         [75]    = "physical port recovery escalation after failed port "
 520                   "recovery",
 521         [76]    = "port recovery escalation after failed unit recovery",
 522         [77]    = "recovery opening nameserver port",
 523         [78]    = "duplicate request id",
 524         [79]    = "link down",
 525         [80]    = "exclusive read-only unit access unsupported",
 526         [81]    = "shared read-write unit access unsupported",
 527         [82]    = "incoming rscn",
 528         [83]    = "incoming wwpn",
 529         [84]    = "",
 530         [85]    = "online",
 531         [86]    = "offline",
 532         [87]    = "ccw device gone",
 533         [88]    = "ccw device no path",
 534         [89]    = "ccw device operational",
 535         [90]    = "ccw device shutdown",
 536         [91]    = "sysfs port addition",
 537         [92]    = "sysfs port removal",
 538         [93]    = "sysfs adapter recovery",
 539         [94]    = "sysfs unit addition",
 540         [95]    = "sysfs unit removal",
 541         [96]    = "sysfs port recovery",
 542         [97]    = "sysfs unit recovery",
 543         [98]    = "sequence number mismatch",
 544         [99]    = "link up",
 545         [100]   = "error state",
 546         [101]   = "status read physical port closed",
 547         [102]   = "link up status read",
 548         [103]   = "too many failed status read buffers",
 549         [104]   = "port handle not valid abort",
 550         [105]   = "lun handle not valid abort",
 551         [106]   = "port handle not valid ct",
 552         [107]   = "port handle not valid close port",
 553         [108]   = "port handle not valid close physical port",
 554         [109]   = "port handle not valid open unit",
 555         [110]   = "port handle not valid close unit",
 556         [111]   = "lun handle not valid close unit",
 557         [112]   = "port handle not valid fcp",
 558         [113]   = "lun handle not valid fcp",
 559         [114]   = "handle mismatch fcp",
 560         [115]   = "lun not valid fcp",
 561         [116]   = "qdio send failed",
 562         [117]   = "version mismatch",
 563         [118]   = "incompatible qtcb type",
 564         [119]   = "unknown protocol status",
 565         [120]   = "unknown fsf command",
 566         [121]   = "no recommendation for status qualifier",
 567         [122]   = "status read physical port closed in error",
 568         [123]   = "fc service class not supported",
 569         [124]   = "",
 570         [125]   = "need newer zfcp",
 571         [126]   = "need newer microcode",
 572         [127]   = "arbitrated loop not supported",
 573         [128]   = "unknown topology",
 574         [129]   = "qtcb size mismatch",
 575         [130]   = "unknown fsf status ecd",
 576         [131]   = "fcp request too big",
 577         [132]   = "",
 578         [133]   = "data direction not valid fcp",
 579         [134]   = "command length not valid fcp",
 580         [135]   = "status read act update",
 581         [136]   = "status read cfdc update",
 582         [137]   = "hbaapi port open",
 583         [138]   = "hbaapi unit open",
 584         [139]   = "hbaapi unit shutdown",
 585         [140]   = "qdio error outbound",
 586         [141]   = "scsi host reset",
 587         [142]   = "dismissing fsf request for recovery action",
 588         [143]   = "recovery action timed out",
 589         [144]   = "recovery action gone",
 590         [145]   = "recovery action being processed",
 591         [146]   = "recovery action ready for next step",
 592         [147]   = "qdio error inbound",
 593         [148]   = "nameserver needed for port scan",
 594         [149]   = "port scan",
 595         [150]   = "ptp attach",
 596         [151]   = "port validation failed",
 597 };
 598
 599 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
 600                                     char *buf, const char *_rec)
 601 {
 602         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
 603         char *p = buf;
 604
 605         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
 606         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
 607         zfcp_dbf_out(&p, "id", "%d", r->id2);
 608         switch (r->id) {
 609         case ZFCP_REC_DBF_ID_THREAD:
 610                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 611                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 612                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 613                 break;
 614         case ZFCP_REC_DBF_ID_TARGET:
 615                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 616                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 617                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 618                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 619                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 620                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 621                 break;
 622         case ZFCP_REC_DBF_ID_TRIGGER:
 623                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 624                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 625                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 626                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 627                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 628                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 629                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 630                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 631                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 632                 break;
 633         case ZFCP_REC_DBF_ID_ACTION:
 634                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 635                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 636                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 637                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 638                 break;
 639         }
 640         p += sprintf(p, "\n");
 641         return p - buf;
 642 }
 643
 644 static struct debug_view zfcp_rec_dbf_view = {
 645         "structured",
 646         NULL,
 647         &zfcp_dbf_view_header,
 648         &zfcp_rec_dbf_view_format,
 649         NULL,
 650         NULL
 651 };
 652
 653 /**
 654  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 655  * @id2: identifier for event
 656  * @adapter: adapter
 657  * This function assumes that the caller is holding erp_lock.
 658  */
 659 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter)
 660 {
 661         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 662         unsigned long flags = 0;
 663         struct list_head *entry;
 664         unsigned ready = 0, running = 0, total;
 665
 666         list_for_each(entry, &adapter->erp_ready_head)
 667                 ready++;
 668         list_for_each(entry, &adapter->erp_running_head)
 669                 running++;
 670         total = adapter->erp_total_count;
 671
 672         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 673         memset(r, 0, sizeof(*r));
 674         r->id = ZFCP_REC_DBF_ID_THREAD;
 675         r->id2 = id2;
 676         r->u.thread.total = total;
 677         r->u.thread.ready = ready;
 678         r->u.thread.running = running;
 679         debug_event(adapter->rec_dbf, 6, r, sizeof(*r));
 680         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 681 }
 682
 683 /**
 684  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 685  * @id2: identifier for event
 686  * @adapter: adapter
 687  * This function assumes that the caller does not hold erp_lock.
 688  */
 689 void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter)
 690 {
 691         unsigned long flags;
 692
 693         read_lock_irqsave(&adapter->erp_lock, flags);
 694         zfcp_rec_dbf_event_thread(id2, adapter);
 695         read_unlock_irqrestore(&adapter->erp_lock, flags);
 696 }
 697
 698 static void zfcp_rec_dbf_event_target(u8 id2, void *ref,
 699                                       struct zfcp_adapter *adapter,
 700                                       atomic_t *status, atomic_t *erp_count,
 701                                       u64 wwpn, u32 d_id, u64 fcp_lun)
 702 {
 703         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 704         unsigned long flags;
 705
 706         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 707         memset(r, 0, sizeof(*r));
 708         r->id = ZFCP_REC_DBF_ID_TARGET;
 709         r->id2 = id2;
 710         r->u.target.ref = (unsigned long)ref;
 711         r->u.target.status = atomic_read(status);
 712         r->u.target.wwpn = wwpn;
 713         r->u.target.d_id = d_id;
 714         r->u.target.fcp_lun = fcp_lun;
 715         r->u.target.erp_count = atomic_read(erp_count);
 716         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
 717         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 718 }
 719
 720 /**
 721  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
 722  * @id: identifier for trigger of state change
 723  * @ref: additional reference (e.g. request)
 724  * @adapter: adapter
 725  */
 726 void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *adapter)
 727 {
 728         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
 729                                   &adapter->erp_counter, 0, 0, 0);
 730 }
 731
 732 /**
 733  * zfcp_rec_dbf_event_port - trace event for port state change
 734  * @id: identifier for trigger of state change
 735  * @ref: additional reference (e.g. request)
 736  * @port: port
 737  */
 738 void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port)
 739 {
 740         struct zfcp_adapter *adapter = port->adapter;
 741
 742         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
 743                                   &port->erp_counter, port->wwpn, port->d_id,
 744                                   0);
 745 }
 746
 747 /**
 748  * zfcp_rec_dbf_event_unit - trace event for unit state change
 749  * @id: identifier for trigger of state change
 750  * @ref: additional reference (e.g. request)
 751  * @unit: unit
 752  */
 753 void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit)
 754 {
 755         struct zfcp_port *port = unit->port;
 756         struct zfcp_adapter *adapter = port->adapter;
 757
 758         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
 759                                   &unit->erp_counter, port->wwpn, port->d_id,
 760                                   unit->fcp_lun);
 761 }
 762
 763 /**
 764  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
 765  * @id2: identifier for error recovery trigger
 766  * @ref: additional reference (e.g. request)
 767  * @want: originally requested error recovery action
 768  * @need: error recovery action actually initiated
 769  * @action: address of error recovery action struct
 770  * @adapter: adapter
 771  * @port: port
 772  * @unit: unit
 773  */
 774 void zfcp_rec_dbf_event_trigger(u8 id2, void *ref, u8 want, u8 need,
 775                                 void *action, struct zfcp_adapter *adapter,
 776                                 struct zfcp_port *port, struct zfcp_unit *unit)
 777 {
 778         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 779         unsigned long flags;
 780
 781         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 782         memset(r, 0, sizeof(*r));
 783         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 784         r->id2 = id2;
 785         r->u.trigger.ref = (unsigned long)ref;
 786         r->u.trigger.want = want;
 787         r->u.trigger.need = need;
 788         r->u.trigger.action = (unsigned long)action;
 789         r->u.trigger.as = atomic_read(&adapter->status);
 790         if (port) {
 791                 r->u.trigger.ps = atomic_read(&port->status);
 792                 r->u.trigger.wwpn = port->wwpn;
 793         }
 794         if (unit) {
 795                 r->u.trigger.us = atomic_read(&unit->status);
 796                 r->u.trigger.fcp_lun = unit->fcp_lun;
 797         }
 798         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
 799         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 800 }
 801
 802 /**
 803  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
 804  * @id2: identifier
 805  * @erp_action: error recovery action struct pointer
 806  */
 807 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
 808 {
 809         struct zfcp_adapter *adapter = erp_action->adapter;
 810         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 811         unsigned long flags;
 812
 813         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 814         memset(r, 0, sizeof(*r));
 815         r->id = ZFCP_REC_DBF_ID_ACTION;
 816         r->id2 = id2;
 817         r->u.action.action = (unsigned long)erp_action;
 818         r->u.action.status = erp_action->status;
 819         r->u.action.step = erp_action->step;
 820         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
 821         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
 822         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 823 }
 824
 825 /**
 826  * zfcp_san_dbf_event_ct_request - trace event for issued CT request
 827  * @fsf_req: request containing issued CT data
 828  */
 829 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 830 {
 831         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 832         struct zfcp_port *port = ct->port;
 833         struct zfcp_adapter *adapter = port->adapter;
 834         struct ct_hdr *hdr = zfcp_sg_to_address(ct->req);
 835         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
 836         struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
 837         unsigned long flags;
 838
 839         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 840         memset(r, 0, sizeof(*r));
 841         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 842         r->fsf_reqid = (unsigned long)fsf_req;
 843         r->fsf_seqno = fsf_req->seq_no;
 844         r->s_id = fc_host_port_id(adapter->scsi_host);
 845         r->d_id = port->d_id;
 846         oct->cmd_req_code = hdr->cmd_rsp_code;
 847         oct->revision = hdr->revision;
 848         oct->gs_type = hdr->gs_type;
 849         oct->gs_subtype = hdr->gs_subtype;
 850         oct->options = hdr->options;
 851         oct->max_res_size = hdr->max_res_size;
 852         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 853                        ZFCP_DBF_CT_PAYLOAD);
 854         memcpy(oct->payload, (void *)hdr + sizeof(struct ct_hdr), oct->len);
 855         debug_event(adapter->san_dbf, 3, r, sizeof(*r));
 856         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 857 }
 858
 859 /**
 860  * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
 861  * @fsf_req: request containing CT response
 862  */
 863 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 864 {
 865         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 866         struct zfcp_port *port = ct->port;
 867         struct zfcp_adapter *adapter = port->adapter;
 868         struct ct_hdr *hdr = zfcp_sg_to_address(ct->resp);
 869         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
 870         struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
 871         unsigned long flags;
 872
 873         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 874         memset(r, 0, sizeof(*r));
 875         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 876         r->fsf_reqid = (unsigned long)fsf_req;
 877         r->fsf_seqno = fsf_req->seq_no;
 878         r->s_id = port->d_id;
 879         r->d_id = fc_host_port_id(adapter->scsi_host);
 880         rct->cmd_rsp_code = hdr->cmd_rsp_code;
 881         rct->revision = hdr->revision;
 882         rct->reason_code = hdr->reason_code;
 883         rct->expl = hdr->reason_code_expl;
 884         rct->vendor_unique = hdr->vendor_unique;
 885         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 886                        ZFCP_DBF_CT_PAYLOAD);
 887         memcpy(rct->payload, (void *)hdr + sizeof(struct ct_hdr), rct->len);
 888         debug_event(adapter->san_dbf, 3, r, sizeof(*r));
 889         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 890 }
 891
 892 static void zfcp_san_dbf_event_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,
 895                                    int buflen)
 896 {
 897         struct zfcp_adapter *adapter = fsf_req->adapter;
 898         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 899         unsigned long flags;
 900
 901         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 902         memset(rec, 0, sizeof(*rec));
 903         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 904         rec->fsf_reqid = (unsigned long)fsf_req;
 905         rec->fsf_seqno = fsf_req->seq_no;
 906         rec->s_id = s_id;
 907         rec->d_id = d_id;
 908         rec->u.els.ls_code = ls_code;
 909         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
 910         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
 911                          buffer, min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD));
 912         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 913 }
 914
 915 /**
 916  * zfcp_san_dbf_event_els_request - trace event for issued ELS
 917  * @fsf_req: request containing issued ELS
 918  */
 919 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 920 {
 921         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 922
 923         zfcp_san_dbf_event_els("oels", 2, fsf_req,
 924                                fc_host_port_id(els->adapter->scsi_host),
 925                                els->d_id, *(u8 *) zfcp_sg_to_address(els->req),
 926                                zfcp_sg_to_address(els->req), els->req->length);
 927 }
 928
 929 /**
 930  * zfcp_san_dbf_event_els_response - trace event for completed ELS
 931  * @fsf_req: request containing ELS response
 932  */
 933 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 934 {
 935         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 936
 937         zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
 938                                fc_host_port_id(els->adapter->scsi_host),
 939                                *(u8 *)zfcp_sg_to_address(els->req),
 940                                zfcp_sg_to_address(els->resp),
 941                                els->resp->length);
 942 }
 943
 944 /**
 945  * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
 946  * @fsf_req: request containing unsolicited status buffer with incoming ELS
 947  */
 948 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 949 {
 950         struct zfcp_adapter *adapter = fsf_req->adapter;
 951         struct fsf_status_read_buffer *buf =
 952                         (struct fsf_status_read_buffer *)fsf_req->data;
 953         int length = (int)buf->length -
 954                      (int)((void *)&buf->payload - (void *)buf);
 955
 956         zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
 957                                fc_host_port_id(adapter->scsi_host),
 958                                buf->payload.data[0], (void *)buf->payload.data,
 959                                length);
 960 }
 961
 962 static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
 963                                     char *out_buf, const char *in_buf)
 964 {
 965         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
 966         char *buffer = NULL;
 967         int buflen = 0, total = 0;
 968         char *p = out_buf;
 969
 970         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 971                 return 0;
 972
 973         zfcp_dbf_tag(&p, "tag", r->tag);
 974         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 975         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 976         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
 977         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
 978
 979         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 980                 struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
 981                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
 982                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 983                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
 984                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
 985                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
 986                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 987                 total = ct->len;
 988                 buffer = ct->payload;
 989                 buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
 990         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 991                 struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
 992                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
 993                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 994                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
 995                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
 996                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
 997                 total = ct->len;
 998                 buffer = 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                 struct zfcp_san_dbf_record_els *els = &r->u.els;
1004                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
1005                 total = els->len;
1006                 buffer = els->payload;
1007                 buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
1008         }
1009
1010         zfcp_dbf_outd(&p, "payload", buffer, buflen, 0, total);
1011         if (buflen == total)
1012                 p += sprintf(p, "\n");
1013
1014         return p - out_buf;
1015 }
1016
1017 static struct debug_view zfcp_san_dbf_view = {
1018         "structured",
1019         NULL,
1020         &zfcp_dbf_view_header,
1021         &zfcp_san_dbf_view_format,
1022         NULL,
1023         NULL
1024 };
1025
1026 static void zfcp_scsi_dbf_event(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(*rec));
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 = (unsigned char *) &fcp_rsp[1];
1063                                 fcp_sns_info =
1064                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1065
1066                                 rec->rsp_validity = fcp_rsp->validity.value;
1067                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
1068                                 rec->rsp_resid = fcp_rsp->fcp_resid;
1069                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1070                                         rec->rsp_code = *(fcp_rsp_info + 3);
1071                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1072                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1073                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1074                                         rec->sns_info_len = buflen;
1075                                         memcpy(rec->sns_info, fcp_sns_info,
1076                                                min(buflen,
1077                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1078                                         offset += min(buflen,
1079                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1080                                 }
1081
1082                                 rec->fsf_reqid = (unsigned long)fsf_req;
1083                                 rec->fsf_seqno = fsf_req->seq_no;
1084                                 rec->fsf_issued = fsf_req->issued;
1085                         }
1086                         rec->old_fsf_reqid = old_req_id;
1087                 } else {
1088                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1089                         dump->total_size = buflen;
1090                         dump->offset = offset;
1091                         dump->size = min(buflen - offset,
1092                                          (int)sizeof(struct
1093                                                      zfcp_scsi_dbf_record) -
1094                                          (int)sizeof(struct zfcp_dbf_dump));
1095                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1096                         offset += dump->size;
1097                 }
1098                 debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
1099         } while (offset < buflen);
1100         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1101 }
1102
1103 /**
1104  * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
1105  * @tag: tag indicating success or failure of SCSI command
1106  * @level: trace level applicable for this event
1107  * @adapter: adapter that has been used to issue the SCSI command
1108  * @scsi_cmnd: SCSI command pointer
1109  * @fsf_req: request used to issue SCSI command (might be NULL)
1110  */
1111 void zfcp_scsi_dbf_event_result(const char *tag, int level,
1112                                 struct zfcp_adapter *adapter,
1113                                 struct scsi_cmnd *scsi_cmnd,
1114                                 struct zfcp_fsf_req *fsf_req)
1115 {
1116         zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
1117 }
1118
1119 /**
1120  * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
1121  * @tag: tag indicating success or failure of abort operation
1122  * @adapter: adapter thas has been used to issue SCSI command to be aborted
1123  * @scsi_cmnd: SCSI command to be aborted
1124  * @new_fsf_req: request containing abort (might be NULL)
1125  * @old_req_id: identifier of request containg SCSI command to be aborted
1126  */
1127 void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1128                                struct scsi_cmnd *scsi_cmnd,
1129                                struct zfcp_fsf_req *new_fsf_req,
1130                                unsigned long old_req_id)
1131 {
1132         zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
1133                             old_req_id);
1134 }
1135
1136 /**
1137  * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
1138  * @tag: tag indicating success or failure of reset operation
1139  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
1140  * @unit: unit that needs reset
1141  * @scsi_cmnd: SCSI command which caused this error recovery
1142  */
1143 void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
1144                                   struct zfcp_unit *unit,
1145                                   struct scsi_cmnd *scsi_cmnd)
1146 {
1147         zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
1148                             unit->port->adapter, scsi_cmnd, NULL, 0);
1149 }
1150
1151 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
1152                                      char *out_buf, const char *in_buf)
1153 {
1154         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1155         struct timespec t;
1156         char *p = out_buf;
1157
1158         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1159                 return 0;
1160
1161         zfcp_dbf_tag(&p, "tag", r->tag);
1162         zfcp_dbf_tag(&p, "tag2", r->tag2);
1163         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1164         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1165         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1166         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1167         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1168         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1169                       0, ZFCP_DBF_SCSI_OPCODE);
1170         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1171         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1172         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1173                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
1174         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1175         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1176         zfcp_dbf_timestamp(r->fsf_issued, &t);
1177         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1178
1179         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1180                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
1181                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
1182                              r->rsp_scsi_status);
1183                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
1184                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
1185                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
1186                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
1187                               min((int)r->sns_info_len,
1188                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1189                               r->sns_info_len);
1190         }
1191         p += sprintf(p, "\n");
1192         return p - out_buf;
1193 }
1194
1195 static struct debug_view zfcp_scsi_dbf_view = {
1196         "structured",
1197         NULL,
1198         &zfcp_dbf_view_header,
1199         &zfcp_scsi_dbf_view_format,
1200         NULL,
1201         NULL
1202 };
1203
1204 /**
1205  * zfcp_adapter_debug_register - registers debug feature for an adapter
1206  * @adapter: pointer to adapter for which debug features should be registered
1207  * return: -ENOMEM on error, 0 otherwise
1208  */
1209 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1210 {
1211         char dbf_name[DEBUG_MAX_NAME_LEN];
1212
1213         /* debug feature area which records recovery activity */
1214         sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
1215         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1216                                           sizeof(struct zfcp_rec_dbf_record));
1217         if (!adapter->rec_dbf)
1218                 goto failed;
1219         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1220         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1221         debug_set_level(adapter->rec_dbf, 3);
1222
1223         /* debug feature area which records HBA (FSF and QDIO) conditions */
1224         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
1225         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1226                                           sizeof(struct zfcp_hba_dbf_record));
1227         if (!adapter->hba_dbf)
1228                 goto failed;
1229         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1230         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1231         debug_set_level(adapter->hba_dbf, 3);
1232
1233         /* debug feature area which records SAN command failures and recovery */
1234         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
1235         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1236                                           sizeof(struct zfcp_san_dbf_record));
1237         if (!adapter->san_dbf)
1238                 goto failed;
1239         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1240         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1241         debug_set_level(adapter->san_dbf, 6);
1242
1243         /* debug feature area which records SCSI command failures and recovery */
1244         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
1245         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1246                                            sizeof(struct zfcp_scsi_dbf_record));
1247         if (!adapter->scsi_dbf)
1248                 goto failed;
1249         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1250         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1251         debug_set_level(adapter->scsi_dbf, 3);
1252
1253         return 0;
1254
1255  failed:
1256         zfcp_adapter_debug_unregister(adapter);
1257
1258         return -ENOMEM;
1259 }
1260
1261 /**
1262  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1263  * @adapter: pointer to adapter for which debug features should be unregistered
1264  */
1265 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1266 {
1267         debug_unregister(adapter->scsi_dbf);
1268         debug_unregister(adapter->san_dbf);
1269         debug_unregister(adapter->hba_dbf);
1270         debug_unregister(adapter->rec_dbf);
1271         adapter->scsi_dbf = NULL;
1272         adapter->san_dbf = NULL;
1273         adapter->hba_dbf = NULL;
1274         adapter->rec_dbf = NULL;
1275 }