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