drivers/s390/scsi/zfcp_dbf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Debug traces for zfcp.
   5  *
   6  * Copyright IBM Corporation 2002, 2009
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/ctype.h>
  13 #include <asm/debug.h>
  14 #include "zfcp_dbf.h"
  15 #include "zfcp_ext.h"
  16
  17 static u32 dbfsize = 4;
  18
  19 module_param(dbfsize, uint, 0400);
  20 MODULE_PARM_DESC(dbfsize,
  21                  "number of pages for each debug feature area (default 4)");
  22
  23 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  24                              int level, char *from, int from_len)
  25 {
  26         int offset;
  27         struct zfcp_dbf_dump *dump = to;
  28         int room = to_len - sizeof(*dump);
  29
  30         for (offset = 0; offset < from_len; offset += dump->size) {
  31                 memset(to, 0, to_len);
  32                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  33                 dump->total_size = from_len;
  34                 dump->offset = offset;
  35                 dump->size = min(from_len - offset, room);
  36                 memcpy(dump->data, from + offset, dump->size);
  37                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
  38         }
  39 }
  40
  41 /* FIXME: this duplicate this code in s390 debug feature */
  42 static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
  43 {
  44         unsigned long long sec;
  45
  46         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  47         sec = stck >> 12;
  48         do_div(sec, 1000000);
  49         time->tv_sec = sec;
  50         stck -= (sec * 1000000) << 12;
  51         time->tv_nsec = ((stck * 1000) >> 12);
  52 }
  53
  54 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  55 {
  56         int i;
  57
  58         *p += sprintf(*p, "%-24s", label);
  59         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  60                 *p += sprintf(*p, "%c", tag[i]);
  61         *p += sprintf(*p, "\n");
  62 }
  63
  64 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  65 {
  66         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  67 }
  68
  69 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  70 {
  71         va_list arg;
  72
  73         *buf += sprintf(*buf, "%-24s", s);
  74         va_start(arg, format);
  75         *buf += vsprintf(*buf, format, arg);
  76         va_end(arg);
  77         *buf += sprintf(*buf, "\n");
  78 }
  79
  80 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  81                           int buflen, int offset, int total_size)
  82 {
  83         if (!offset)
  84                 *p += sprintf(*p, "%-24s  ", label);
  85         while (buflen--) {
  86                 if (offset > 0) {
  87                         if ((offset % 32) == 0)
  88                                 *p += sprintf(*p, "\n%-24c  ", ' ');
  89                         else if ((offset % 4) == 0)
  90                                 *p += sprintf(*p, " ");
  91                 }
  92                 *p += sprintf(*p, "%02x", *buffer++);
  93                 if (++offset == total_size) {
  94                         *p += sprintf(*p, "\n");
  95                         break;
  96                 }
  97         }
  98         if (!total_size)
  99                 *p += sprintf(*p, "\n");
 100 }
 101
 102 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
 103                                 int area, debug_entry_t *entry, char *out_buf)
 104 {
 105         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 106         struct timespec t;
 107         char *p = out_buf;
 108
 109         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 110                 zfcp_dbf_timestamp(entry->id.stck, &t);
 111                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 112                              t.tv_sec, t.tv_nsec);
 113                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 114         } else  {
 115                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
 116                               dump->total_size);
 117                 if ((dump->offset + dump->size) == dump->total_size)
 118                         p += sprintf(p, "\n");
 119         }
 120         return p - out_buf;
 121 }
 122
 123 /**
 124  * zfcp_hba_dbf_event_fsf_response - trace event for request completion
 125  * @fsf_req: request that has been completed
 126  */
 127 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 128 {
 129         struct zfcp_adapter *adapter = fsf_req->adapter;
 130         struct zfcp_dbf *dbf = adapter->dbf;
 131         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 132         union fsf_prot_status_qual *prot_status_qual =
 133                                         &qtcb->prefix.prot_status_qual;
 134         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 135         struct scsi_cmnd *scsi_cmnd;
 136         struct zfcp_port *port;
 137         struct zfcp_unit *unit;
 138         struct zfcp_send_els *send_els;
 139         struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
 140         struct zfcp_hba_dbf_record_response *response = &rec->u.response;
 141         int level;
 142         unsigned long flags;
 143
 144         spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 145         memset(rec, 0, sizeof(*rec));
 146         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 147
 148         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 149             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 150                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 151                 level = 1;
 152         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 153                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 154                 level = 1;
 155         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 156                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 157                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 158                 level = 4;
 159         } else if (qtcb->header.log_length) {
 160                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
 161                 level = 5;
 162         } else {
 163                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 164                 level = 6;
 165         }
 166
 167         response->fsf_command = fsf_req->fsf_command;
 168         response->fsf_reqid = fsf_req->req_id;
 169         response->fsf_seqno = fsf_req->seq_no;
 170         response->fsf_issued = fsf_req->issued;
 171         response->fsf_prot_status = qtcb->prefix.prot_status;
 172         response->fsf_status = qtcb->header.fsf_status;
 173         memcpy(response->fsf_prot_status_qual,
 174                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 175         memcpy(response->fsf_status_qual,
 176                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 177         response->fsf_req_status = fsf_req->status;
 178         response->sbal_first = fsf_req->sbal_first;
 179         response->sbal_last = fsf_req->sbal_last;
 180         response->sbal_response = fsf_req->sbal_response;
 181         response->pool = fsf_req->pool != NULL;
 182         response->erp_action = (unsigned long)fsf_req->erp_action;
 183
 184         switch (fsf_req->fsf_command) {
 185         case FSF_QTCB_FCP_CMND:
 186                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 187                         break;
 188                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 189                 if (scsi_cmnd) {
 190                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 191                         response->u.fcp.serial = scsi_cmnd->serial_number;
 192                 }
 193                 break;
 194
 195         case FSF_QTCB_OPEN_PORT_WITH_DID:
 196         case FSF_QTCB_CLOSE_PORT:
 197         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 198                 port = (struct zfcp_port *)fsf_req->data;
 199                 response->u.port.wwpn = port->wwpn;
 200                 response->u.port.d_id = port->d_id;
 201                 response->u.port.port_handle = qtcb->header.port_handle;
 202                 break;
 203
 204         case FSF_QTCB_OPEN_LUN:
 205         case FSF_QTCB_CLOSE_LUN:
 206                 unit = (struct zfcp_unit *)fsf_req->data;
 207                 port = unit->port;
 208                 response->u.unit.wwpn = port->wwpn;
 209                 response->u.unit.fcp_lun = unit->fcp_lun;
 210                 response->u.unit.port_handle = qtcb->header.port_handle;
 211                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 212                 break;
 213
 214         case FSF_QTCB_SEND_ELS:
 215                 send_els = (struct zfcp_send_els *)fsf_req->data;
 216                 response->u.els.d_id = qtcb->bottom.support.d_id;
 217                 response->u.els.ls_code = send_els->ls_code >> 24;
 218                 break;
 219
 220         case FSF_QTCB_ABORT_FCP_CMND:
 221         case FSF_QTCB_SEND_GENERIC:
 222         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 223         case FSF_QTCB_EXCHANGE_PORT_DATA:
 224         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 225         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 226                 break;
 227         }
 228
 229         debug_event(dbf->hba_dbf, level, rec, sizeof(*rec));
 230
 231         /* have fcp channel microcode fixed to use as little as possible */
 232         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 233                 /* adjust length skipping trailing zeros */
 234                 char *buf = (char *)qtcb + qtcb->header.log_start;
 235                 int len = qtcb->header.log_length;
 236                 for (; len && !buf[len - 1]; len--);
 237                 zfcp_dbf_hexdump(dbf->hba_dbf, rec, sizeof(*rec), level, buf,
 238                                  len);
 239         }
 240
 241         spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 242 }
 243
 244 /**
 245  * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
 246  * @tag: tag indicating which kind of unsolicited status has been received
 247  * @adapter: adapter that has issued the unsolicited status buffer
 248  * @status_buffer: buffer containing payload of unsolicited status
 249  */
 250 void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 251                                   struct fsf_status_read_buffer *status_buffer)
 252 {
 253         struct zfcp_dbf *dbf = adapter->dbf;
 254         struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
 255         unsigned long flags;
 256
 257         spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 258         memset(rec, 0, sizeof(*rec));
 259         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 260         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 261
 262         rec->u.status.failed = atomic_read(&adapter->stat_miss);
 263         if (status_buffer != NULL) {
 264                 rec->u.status.status_type = status_buffer->status_type;
 265                 rec->u.status.status_subtype = status_buffer->status_subtype;
 266                 memcpy(&rec->u.status.queue_designator,
 267                        &status_buffer->queue_designator,
 268                        sizeof(struct fsf_queue_designator));
 269
 270                 switch (status_buffer->status_type) {
 271                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 272                         rec->u.status.payload_size =
 273                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 274                         break;
 275
 276                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 277                         rec->u.status.payload_size =
 278                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 279                         break;
 280
 281                 case FSF_STATUS_READ_LINK_DOWN:
 282                         switch (status_buffer->status_subtype) {
 283                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 284                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 285                                 rec->u.status.payload_size =
 286                                         sizeof(struct fsf_link_down_info);
 287                         }
 288                         break;
 289
 290                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 291                         rec->u.status.payload_size =
 292                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 293                         break;
 294                 }
 295                 memcpy(&rec->u.status.payload,
 296                        &status_buffer->payload, rec->u.status.payload_size);
 297         }
 298
 299         debug_event(dbf->hba_dbf, 2, rec, sizeof(*rec));
 300         spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 301 }
 302
 303 /**
 304  * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
 305  * @adapter: adapter affected by this QDIO related event
 306  * @qdio_error: as passed by qdio module
 307  * @sbal_index: first buffer with error condition, as passed by qdio module
 308  * @sbal_count: number of buffers affected, as passed by qdio module
 309  */
 310 void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
 311                              unsigned int qdio_error, int sbal_index,
 312                              int sbal_count)
 313 {
 314         struct zfcp_dbf *dbf = adapter->dbf;
 315         struct zfcp_hba_dbf_record *r = &dbf->hba_dbf_buf;
 316         unsigned long flags;
 317
 318         spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 319         memset(r, 0, sizeof(*r));
 320         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 321         r->u.qdio.qdio_error = qdio_error;
 322         r->u.qdio.sbal_index = sbal_index;
 323         r->u.qdio.sbal_count = sbal_count;
 324         debug_event(dbf->hba_dbf, 0, r, sizeof(*r));
 325         spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 326 }
 327
 328 /**
 329  * zfcp_hba_dbf_event_berr - trace event for bit error threshold
 330  * @adapter: adapter affected by this QDIO related event
 331  * @req: fsf request
 332  */
 333 void zfcp_hba_dbf_event_berr(struct zfcp_adapter *adapter,
 334                              struct zfcp_fsf_req *req)
 335 {
 336         struct zfcp_dbf *dbf = adapter->dbf;
 337         struct zfcp_hba_dbf_record *r = &dbf->hba_dbf_buf;
 338         struct fsf_status_read_buffer *sr_buf = req->data;
 339         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 343         memset(r, 0, sizeof(*r));
 344         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 345         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
 346         debug_event(dbf->hba_dbf, 0, r, sizeof(*r));
 347         spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 348 }
 349 static void zfcp_hba_dbf_view_response(char **p,
 350                                        struct zfcp_hba_dbf_record_response *r)
 351 {
 352         struct timespec t;
 353
 354         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 355         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 356         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 357         zfcp_dbf_timestamp(r->fsf_issued, &t);
 358         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 359         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 360         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 361         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 362                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 363         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 364                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 365         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 366         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 367         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 368         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
 369         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 370
 371         switch (r->fsf_command) {
 372         case FSF_QTCB_FCP_CMND:
 373                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 374                         break;
 375                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
 376                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
 377                 p += sprintf(*p, "\n");
 378                 break;
 379
 380         case FSF_QTCB_OPEN_PORT_WITH_DID:
 381         case FSF_QTCB_CLOSE_PORT:
 382         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 383                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
 384                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
 385                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 386                 break;
 387
 388         case FSF_QTCB_OPEN_LUN:
 389         case FSF_QTCB_CLOSE_LUN:
 390                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
 391                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
 392                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
 393                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 394                 break;
 395
 396         case FSF_QTCB_SEND_ELS:
 397                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
 398                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
 399                 break;
 400
 401         case FSF_QTCB_ABORT_FCP_CMND:
 402         case FSF_QTCB_SEND_GENERIC:
 403         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 404         case FSF_QTCB_EXCHANGE_PORT_DATA:
 405         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 406         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 407                 break;
 408         }
 409 }
 410
 411 static void zfcp_hba_dbf_view_status(char **p,
 412                                      struct zfcp_hba_dbf_record_status *r)
 413 {
 414         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 415         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 416         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 417         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 418                       sizeof(struct fsf_queue_designator), 0,
 419                       sizeof(struct fsf_queue_designator));
 420         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 421                       r->payload_size);
 422 }
 423
 424 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
 425 {
 426         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 427         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 428         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 429 }
 430
 431 static void zfcp_hba_dbf_view_berr(char **p, struct fsf_bit_error_payload *r)
 432 {
 433         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 434         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
 435         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
 436         zfcp_dbf_out(p, "prim_seq_err", "%d",
 437                      r->primitive_sequence_error_count);
 438         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
 439                      r->invalid_transmission_word_error_count);
 440         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
 441         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
 442                      r->primitive_sequence_event_timeout_count);
 443         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
 444                      r->elastic_buffer_overrun_error_count);
 445         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
 446                      r->advertised_receive_b2b_credit);
 447         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
 448                      r->current_receive_b2b_credit);
 449         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
 450                      r->advertised_transmit_b2b_credit);
 451         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
 452                      r->current_transmit_b2b_credit);
 453 }
 454
 455 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
 456                                     char *out_buf, const char *in_buf)
 457 {
 458         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
 459         char *p = out_buf;
 460
 461         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 462                 return 0;
 463
 464         zfcp_dbf_tag(&p, "tag", r->tag);
 465         if (isalpha(r->tag2[0]))
 466                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 467
 468         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 469                 zfcp_hba_dbf_view_response(&p, &r->u.response);
 470         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 471                 zfcp_hba_dbf_view_status(&p, &r->u.status);
 472         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 473                 zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
 474         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
 475                 zfcp_hba_dbf_view_berr(&p, &r->u.berr);
 476
 477         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 478                 p += sprintf(p, "\n");
 479         return p - out_buf;
 480 }
 481
 482 static struct debug_view zfcp_hba_dbf_view = {
 483         "structured",
 484         NULL,
 485         &zfcp_dbf_view_header,
 486         &zfcp_hba_dbf_view_format,
 487         NULL,
 488         NULL
 489 };
 490
 491 static const char *zfcp_rec_dbf_tags[] = {
 492         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 493         [ZFCP_REC_DBF_ID_TARGET] = "target",
 494         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 495         [ZFCP_REC_DBF_ID_ACTION] = "action",
 496 };
 497
 498 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
 499                                     char *buf, const char *_rec)
 500 {
 501         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
 502         char *p = buf;
 503         char hint[ZFCP_DBF_ID_SIZE + 1];
 504
 505         memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
 506         hint[ZFCP_DBF_ID_SIZE] = 0;
 507         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
 508         zfcp_dbf_outs(&p, "hint", hint);
 509         switch (r->id) {
 510         case ZFCP_REC_DBF_ID_THREAD:
 511                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 512                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 513                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 514                 break;
 515         case ZFCP_REC_DBF_ID_TARGET:
 516                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 517                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 518                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 519                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 520                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 521                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 522                 break;
 523         case ZFCP_REC_DBF_ID_TRIGGER:
 524                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 525                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 526                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 527                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 528                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 529                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 530                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 531                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 532                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 533                 break;
 534         case ZFCP_REC_DBF_ID_ACTION:
 535                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 536                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 537                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 538                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 539                 break;
 540         }
 541         p += sprintf(p, "\n");
 542         return p - buf;
 543 }
 544
 545 static struct debug_view zfcp_rec_dbf_view = {
 546         "structured",
 547         NULL,
 548         &zfcp_dbf_view_header,
 549         &zfcp_rec_dbf_view_format,
 550         NULL,
 551         NULL
 552 };
 553
 554 /**
 555  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 556  * @id2: identifier for event
 557  * @adapter: adapter
 558  * This function assumes that the caller is holding erp_lock.
 559  */
 560 void zfcp_rec_dbf_event_thread(char *id2, struct zfcp_adapter *adapter)
 561 {
 562         struct zfcp_dbf *dbf = adapter->dbf;
 563         struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 564         unsigned long flags = 0;
 565         struct list_head *entry;
 566         unsigned ready = 0, running = 0, total;
 567
 568         list_for_each(entry, &adapter->erp_ready_head)
 569                 ready++;
 570         list_for_each(entry, &adapter->erp_running_head)
 571                 running++;
 572         total = adapter->erp_total_count;
 573
 574         spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 575         memset(r, 0, sizeof(*r));
 576         r->id = ZFCP_REC_DBF_ID_THREAD;
 577         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 578         r->u.thread.total = total;
 579         r->u.thread.ready = ready;
 580         r->u.thread.running = running;
 581         debug_event(dbf->rec_dbf, 6, r, sizeof(*r));
 582         spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 583 }
 584
 585 /**
 586  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 587  * @id2: identifier for event
 588  * @adapter: adapter
 589  * This function assumes that the caller does not hold erp_lock.
 590  */
 591 void zfcp_rec_dbf_event_thread_lock(char *id2, struct zfcp_adapter *adapter)
 592 {
 593         unsigned long flags;
 594
 595         read_lock_irqsave(&adapter->erp_lock, flags);
 596         zfcp_rec_dbf_event_thread(id2, adapter);
 597         read_unlock_irqrestore(&adapter->erp_lock, flags);
 598 }
 599
 600 static void zfcp_rec_dbf_event_target(char *id2, void *ref,
 601                                       struct zfcp_adapter *adapter,
 602                                       atomic_t *status, atomic_t *erp_count,
 603                                       u64 wwpn, u32 d_id, u64 fcp_lun)
 604 {
 605         struct zfcp_dbf *dbf = adapter->dbf;
 606         struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 607         unsigned long flags;
 608
 609         spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 610         memset(r, 0, sizeof(*r));
 611         r->id = ZFCP_REC_DBF_ID_TARGET;
 612         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 613         r->u.target.ref = (unsigned long)ref;
 614         r->u.target.status = atomic_read(status);
 615         r->u.target.wwpn = wwpn;
 616         r->u.target.d_id = d_id;
 617         r->u.target.fcp_lun = fcp_lun;
 618         r->u.target.erp_count = atomic_read(erp_count);
 619         debug_event(dbf->rec_dbf, 3, r, sizeof(*r));
 620         spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 621 }
 622
 623 /**
 624  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
 625  * @id: identifier for trigger of state change
 626  * @ref: additional reference (e.g. request)
 627  * @adapter: adapter
 628  */
 629 void zfcp_rec_dbf_event_adapter(char *id, void *ref,
 630                                 struct zfcp_adapter *adapter)
 631 {
 632         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
 633                                   &adapter->erp_counter, 0, 0, 0);
 634 }
 635
 636 /**
 637  * zfcp_rec_dbf_event_port - trace event for port state change
 638  * @id: identifier for trigger of state change
 639  * @ref: additional reference (e.g. request)
 640  * @port: port
 641  */
 642 void zfcp_rec_dbf_event_port(char *id, void *ref, struct zfcp_port *port)
 643 {
 644         struct zfcp_adapter *adapter = port->adapter;
 645
 646         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
 647                                   &port->erp_counter, port->wwpn, port->d_id,
 648                                   0);
 649 }
 650
 651 /**
 652  * zfcp_rec_dbf_event_unit - trace event for unit state change
 653  * @id: identifier for trigger of state change
 654  * @ref: additional reference (e.g. request)
 655  * @unit: unit
 656  */
 657 void zfcp_rec_dbf_event_unit(char *id, void *ref, struct zfcp_unit *unit)
 658 {
 659         struct zfcp_port *port = unit->port;
 660         struct zfcp_adapter *adapter = port->adapter;
 661
 662         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
 663                                   &unit->erp_counter, port->wwpn, port->d_id,
 664                                   unit->fcp_lun);
 665 }
 666
 667 /**
 668  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
 669  * @id2: identifier for error recovery trigger
 670  * @ref: additional reference (e.g. request)
 671  * @want: originally requested error recovery action
 672  * @need: error recovery action actually initiated
 673  * @action: address of error recovery action struct
 674  * @adapter: adapter
 675  * @port: port
 676  * @unit: unit
 677  */
 678 void zfcp_rec_dbf_event_trigger(char *id2, void *ref, u8 want, u8 need,
 679                                 void *action, struct zfcp_adapter *adapter,
 680                                 struct zfcp_port *port, struct zfcp_unit *unit)
 681 {
 682         struct zfcp_dbf *dbf = adapter->dbf;
 683         struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 684         unsigned long flags;
 685
 686         spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 687         memset(r, 0, sizeof(*r));
 688         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 689         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 690         r->u.trigger.ref = (unsigned long)ref;
 691         r->u.trigger.want = want;
 692         r->u.trigger.need = need;
 693         r->u.trigger.action = (unsigned long)action;
 694         r->u.trigger.as = atomic_read(&adapter->status);
 695         if (port) {
 696                 r->u.trigger.ps = atomic_read(&port->status);
 697                 r->u.trigger.wwpn = port->wwpn;
 698         }
 699         if (unit) {
 700                 r->u.trigger.us = atomic_read(&unit->status);
 701                 r->u.trigger.fcp_lun = unit->fcp_lun;
 702         }
 703         debug_event(dbf->rec_dbf, action ? 1 : 4, r, sizeof(*r));
 704         spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 705 }
 706
 707 /**
 708  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
 709  * @id2: identifier
 710  * @erp_action: error recovery action struct pointer
 711  */
 712 void zfcp_rec_dbf_event_action(char *id2, struct zfcp_erp_action *erp_action)
 713 {
 714         struct zfcp_adapter *adapter = erp_action->adapter;
 715         struct zfcp_dbf *dbf = adapter->dbf;
 716         struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 717         unsigned long flags;
 718
 719         spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 720         memset(r, 0, sizeof(*r));
 721         r->id = ZFCP_REC_DBF_ID_ACTION;
 722         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 723         r->u.action.action = (unsigned long)erp_action;
 724         r->u.action.status = erp_action->status;
 725         r->u.action.step = erp_action->step;
 726         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
 727         debug_event(dbf->rec_dbf, 5, r, sizeof(*r));
 728         spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 729 }
 730
 731 /**
 732  * zfcp_san_dbf_event_ct_request - trace event for issued CT request
 733  * @fsf_req: request containing issued CT data
 734  */
 735 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 736 {
 737         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 738         struct zfcp_wka_port *wka_port = ct->wka_port;
 739         struct zfcp_adapter *adapter = wka_port->adapter;
 740         struct zfcp_dbf *dbf = adapter->dbf;
 741         struct ct_hdr *hdr = sg_virt(ct->req);
 742         struct zfcp_san_dbf_record *r = &dbf->san_dbf_buf;
 743         struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
 744         int level = 3;
 745         unsigned long flags;
 746
 747         spin_lock_irqsave(&dbf->san_dbf_lock, flags);
 748         memset(r, 0, sizeof(*r));
 749         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 750         r->fsf_reqid = fsf_req->req_id;
 751         r->fsf_seqno = fsf_req->seq_no;
 752         r->s_id = fc_host_port_id(adapter->scsi_host);
 753         r->d_id = wka_port->d_id;
 754         oct->cmd_req_code = hdr->cmd_rsp_code;
 755         oct->revision = hdr->revision;
 756         oct->gs_type = hdr->gs_type;
 757         oct->gs_subtype = hdr->gs_subtype;
 758         oct->options = hdr->options;
 759         oct->max_res_size = hdr->max_res_size;
 760         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 761                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 762         debug_event(dbf->san_dbf, level, r, sizeof(*r));
 763         zfcp_dbf_hexdump(dbf->san_dbf, r, sizeof(*r), level,
 764                          (void *)hdr + sizeof(struct ct_hdr), oct->len);
 765         spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
 766 }
 767
 768 /**
 769  * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
 770  * @fsf_req: request containing CT response
 771  */
 772 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 773 {
 774         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 775         struct zfcp_wka_port *wka_port = ct->wka_port;
 776         struct zfcp_adapter *adapter = wka_port->adapter;
 777         struct ct_hdr *hdr = sg_virt(ct->resp);
 778         struct zfcp_dbf *dbf = adapter->dbf;
 779         struct zfcp_san_dbf_record *r = &dbf->san_dbf_buf;
 780         struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
 781         int level = 3;
 782         unsigned long flags;
 783
 784         spin_lock_irqsave(&dbf->san_dbf_lock, flags);
 785         memset(r, 0, sizeof(*r));
 786         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 787         r->fsf_reqid = fsf_req->req_id;
 788         r->fsf_seqno = fsf_req->seq_no;
 789         r->s_id = wka_port->d_id;
 790         r->d_id = fc_host_port_id(adapter->scsi_host);
 791         rct->cmd_rsp_code = hdr->cmd_rsp_code;
 792         rct->revision = hdr->revision;
 793         rct->reason_code = hdr->reason_code;
 794         rct->expl = hdr->reason_code_expl;
 795         rct->vendor_unique = hdr->vendor_unique;
 796         rct->max_res_size = hdr->max_res_size;
 797         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 798                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 799         debug_event(dbf->san_dbf, level, r, sizeof(*r));
 800         zfcp_dbf_hexdump(dbf->san_dbf, r, sizeof(*r), level,
 801                          (void *)hdr + sizeof(struct ct_hdr), rct->len);
 802         spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
 803 }
 804
 805 static void zfcp_san_dbf_event_els(const char *tag, int level,
 806                                    struct zfcp_fsf_req *fsf_req, u32 s_id,
 807                                    u32 d_id, u8 ls_code, void *buffer,
 808                                    int buflen)
 809 {
 810         struct zfcp_adapter *adapter = fsf_req->adapter;
 811         struct zfcp_dbf *dbf = adapter->dbf;
 812         struct zfcp_san_dbf_record *rec = &dbf->san_dbf_buf;
 813         unsigned long flags;
 814
 815         spin_lock_irqsave(&dbf->san_dbf_lock, flags);
 816         memset(rec, 0, sizeof(*rec));
 817         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 818         rec->fsf_reqid = fsf_req->req_id;
 819         rec->fsf_seqno = fsf_req->seq_no;
 820         rec->s_id = s_id;
 821         rec->d_id = d_id;
 822         rec->u.els.ls_code = ls_code;
 823         debug_event(dbf->san_dbf, level, rec, sizeof(*rec));
 824         zfcp_dbf_hexdump(dbf->san_dbf, rec, sizeof(*rec), level,
 825                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
 826         spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
 827 }
 828
 829 /**
 830  * zfcp_san_dbf_event_els_request - trace event for issued ELS
 831  * @fsf_req: request containing issued ELS
 832  */
 833 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 834 {
 835         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 836
 837         zfcp_san_dbf_event_els("oels", 2, fsf_req,
 838                                fc_host_port_id(els->adapter->scsi_host),
 839                                els->d_id, *(u8 *) sg_virt(els->req),
 840                                sg_virt(els->req), els->req->length);
 841 }
 842
 843 /**
 844  * zfcp_san_dbf_event_els_response - trace event for completed ELS
 845  * @fsf_req: request containing ELS response
 846  */
 847 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 848 {
 849         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 850
 851         zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
 852                                fc_host_port_id(els->adapter->scsi_host),
 853                                *(u8 *)sg_virt(els->req), sg_virt(els->resp),
 854                                els->resp->length);
 855 }
 856
 857 /**
 858  * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
 859  * @fsf_req: request containing unsolicited status buffer with incoming ELS
 860  */
 861 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 862 {
 863         struct zfcp_adapter *adapter = fsf_req->adapter;
 864         struct fsf_status_read_buffer *buf =
 865                         (struct fsf_status_read_buffer *)fsf_req->data;
 866         int length = (int)buf->length -
 867                      (int)((void *)&buf->payload - (void *)buf);
 868
 869         zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
 870                                fc_host_port_id(adapter->scsi_host),
 871                                buf->payload.data[0], (void *)buf->payload.data,
 872                                length);
 873 }
 874
 875 static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
 876                                     char *out_buf, const char *in_buf)
 877 {
 878         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
 879         char *p = out_buf;
 880
 881         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 882                 return 0;
 883
 884         zfcp_dbf_tag(&p, "tag", r->tag);
 885         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 886         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 887         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
 888         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
 889
 890         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 891                 struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
 892                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
 893                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 894                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
 895                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
 896                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
 897                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 898         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 899                 struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
 900                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
 901                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 902                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
 903                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
 904                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
 905                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 906         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 907                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 908                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 909                 struct zfcp_san_dbf_record_els *els = &r->u.els;
 910                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
 911         }
 912         return p - out_buf;
 913 }
 914
 915 static struct debug_view zfcp_san_dbf_view = {
 916         "structured",
 917         NULL,
 918         &zfcp_dbf_view_header,
 919         &zfcp_san_dbf_view_format,
 920         NULL,
 921         NULL
 922 };
 923
 924 static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
 925                                 struct zfcp_adapter *adapter,
 926                                 struct scsi_cmnd *scsi_cmnd,
 927                                 struct zfcp_fsf_req *fsf_req,
 928                                 unsigned long old_req_id)
 929 {
 930         struct zfcp_dbf *dbf = adapter->dbf;
 931         struct zfcp_scsi_dbf_record *rec = &dbf->scsi_dbf_buf;
 932         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 933         unsigned long flags;
 934         struct fcp_rsp_iu *fcp_rsp;
 935         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 936         int offset = 0, buflen = 0;
 937
 938         spin_lock_irqsave(&dbf->scsi_dbf_lock, flags);
 939         do {
 940                 memset(rec, 0, sizeof(*rec));
 941                 if (offset == 0) {
 942                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 943                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 944                         if (scsi_cmnd != NULL) {
 945                                 if (scsi_cmnd->device) {
 946                                         rec->scsi_id = scsi_cmnd->device->id;
 947                                         rec->scsi_lun = scsi_cmnd->device->lun;
 948                                 }
 949                                 rec->scsi_result = scsi_cmnd->result;
 950                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 951                                 rec->scsi_serial = scsi_cmnd->serial_number;
 952                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
 953                                         min((int)scsi_cmnd->cmd_len,
 954                                                 ZFCP_DBF_SCSI_OPCODE));
 955                                 rec->scsi_retries = scsi_cmnd->retries;
 956                                 rec->scsi_allowed = scsi_cmnd->allowed;
 957                         }
 958                         if (fsf_req != NULL) {
 959                                 fcp_rsp = (struct fcp_rsp_iu *)
 960                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
 961                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
 962                                 fcp_sns_info =
 963                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 964
 965                                 rec->rsp_validity = fcp_rsp->validity.value;
 966                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
 967                                 rec->rsp_resid = fcp_rsp->fcp_resid;
 968                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
 969                                         rec->rsp_code = *(fcp_rsp_info + 3);
 970                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 971                                         buflen = min((int)fcp_rsp->fcp_sns_len,
 972                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 973                                         rec->sns_info_len = buflen;
 974                                         memcpy(rec->sns_info, fcp_sns_info,
 975                                                min(buflen,
 976                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 977                                         offset += min(buflen,
 978                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 979                                 }
 980
 981                                 rec->fsf_reqid = fsf_req->req_id;
 982                                 rec->fsf_seqno = fsf_req->seq_no;
 983                                 rec->fsf_issued = fsf_req->issued;
 984                         }
 985                         rec->old_fsf_reqid = old_req_id;
 986                 } else {
 987                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 988                         dump->total_size = buflen;
 989                         dump->offset = offset;
 990                         dump->size = min(buflen - offset,
 991                                          (int)sizeof(struct
 992                                                      zfcp_scsi_dbf_record) -
 993                                          (int)sizeof(struct zfcp_dbf_dump));
 994                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 995                         offset += dump->size;
 996                 }
 997                 debug_event(dbf->scsi_dbf, level, rec, sizeof(*rec));
 998         } while (offset < buflen);
 999         spin_unlock_irqrestore(&dbf->scsi_dbf_lock, flags);
1000 }
1001
1002 /**
1003  * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
1004  * @tag: tag indicating success or failure of SCSI command
1005  * @level: trace level applicable for this event
1006  * @adapter: adapter that has been used to issue the SCSI command
1007  * @scsi_cmnd: SCSI command pointer
1008  * @fsf_req: request used to issue SCSI command (might be NULL)
1009  */
1010 void zfcp_scsi_dbf_event_result(const char *tag, int level,
1011                                 struct zfcp_adapter *adapter,
1012                                 struct scsi_cmnd *scsi_cmnd,
1013                                 struct zfcp_fsf_req *fsf_req)
1014 {
1015         zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
1016 }
1017
1018 /**
1019  * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
1020  * @tag: tag indicating success or failure of abort operation
1021  * @adapter: adapter thas has been used to issue SCSI command to be aborted
1022  * @scsi_cmnd: SCSI command to be aborted
1023  * @new_fsf_req: request containing abort (might be NULL)
1024  * @old_req_id: identifier of request containg SCSI command to be aborted
1025  */
1026 void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1027                                struct scsi_cmnd *scsi_cmnd,
1028                                struct zfcp_fsf_req *new_fsf_req,
1029                                unsigned long old_req_id)
1030 {
1031         zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
1032                             old_req_id);
1033 }
1034
1035 /**
1036  * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
1037  * @tag: tag indicating success or failure of reset operation
1038  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
1039  * @unit: unit that needs reset
1040  * @scsi_cmnd: SCSI command which caused this error recovery
1041  */
1042 void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
1043                                   struct zfcp_unit *unit,
1044                                   struct scsi_cmnd *scsi_cmnd)
1045 {
1046         zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
1047                             unit->port->adapter, scsi_cmnd, NULL, 0);
1048 }
1049
1050 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
1051                                      char *out_buf, const char *in_buf)
1052 {
1053         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1054         struct timespec t;
1055         char *p = out_buf;
1056
1057         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1058                 return 0;
1059
1060         zfcp_dbf_tag(&p, "tag", r->tag);
1061         zfcp_dbf_tag(&p, "tag2", r->tag2);
1062         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1063         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1064         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1065         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1066         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1067         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1068                       0, ZFCP_DBF_SCSI_OPCODE);
1069         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1070         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1071         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1072                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
1073         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1074         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1075         zfcp_dbf_timestamp(r->fsf_issued, &t);
1076         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1077
1078         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1079                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
1080                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
1081                              r->rsp_scsi_status);
1082                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
1083                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
1084                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
1085                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
1086                               min((int)r->sns_info_len,
1087                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1088                               r->sns_info_len);
1089         }
1090         p += sprintf(p, "\n");
1091         return p - out_buf;
1092 }
1093
1094 static struct debug_view zfcp_scsi_dbf_view = {
1095         "structured",
1096         NULL,
1097         &zfcp_dbf_view_header,
1098         &zfcp_scsi_dbf_view_format,
1099         NULL,
1100         NULL
1101 };
1102
1103 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
1104                                   struct debug_view *view, int size)
1105 {
1106         struct debug_info *d;
1107
1108         d = debug_register(name, dbfsize, level, size);
1109         if (!d)
1110                 return NULL;
1111
1112         debug_register_view(d, &debug_hex_ascii_view);
1113         debug_register_view(d, view);
1114         debug_set_level(d, level);
1115
1116         return d;
1117 }
1118
1119 /**
1120  * zfcp_adapter_debug_register - registers debug feature for an adapter
1121  * @adapter: pointer to adapter for which debug features should be registered
1122  * return: -ENOMEM on error, 0 otherwise
1123  */
1124 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1125 {
1126         char dbf_name[DEBUG_MAX_NAME_LEN];
1127         struct zfcp_dbf *dbf;
1128
1129         dbf = kmalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
1130         if (!dbf)
1131                 return -ENOMEM;
1132
1133         spin_lock_init(&dbf->hba_dbf_lock);
1134         spin_lock_init(&dbf->san_dbf_lock);
1135         spin_lock_init(&dbf->scsi_dbf_lock);
1136         spin_lock_init(&dbf->rec_dbf_lock);
1137
1138         /* debug feature area which records recovery activity */
1139         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1140         dbf->rec_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_rec_dbf_view,
1141                                     sizeof(struct zfcp_rec_dbf_record));
1142         if (!dbf->rec_dbf)
1143                 goto fail_rec;
1144
1145         /* debug feature area which records HBA (FSF and QDIO) conditions */
1146         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1147         dbf->hba_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_hba_dbf_view,
1148                                     sizeof(struct zfcp_hba_dbf_record));
1149         if (!dbf->hba_dbf)
1150                 goto fail_hba;
1151
1152         /* debug feature area which records SAN command failures and recovery */
1153         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1154         dbf->san_dbf = zfcp_dbf_reg(dbf_name, 6, &zfcp_san_dbf_view,
1155                                     sizeof(struct zfcp_san_dbf_record));
1156         if (!dbf->san_dbf)
1157                 goto fail_san;
1158
1159         /* debug feature area which records SCSI command failures and recovery */
1160         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1161         dbf->scsi_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_scsi_dbf_view,
1162                                      sizeof(struct zfcp_scsi_dbf_record));
1163         if (!dbf->scsi_dbf)
1164                 goto fail_scsi;
1165
1166         adapter->dbf = dbf;
1167         return 0;
1168
1169 fail_scsi:
1170         debug_unregister(dbf->san_dbf);
1171 fail_san:
1172         debug_unregister(dbf->hba_dbf);
1173 fail_hba:
1174         debug_unregister(dbf->rec_dbf);
1175 fail_rec:
1176         kfree(dbf);
1177         return -ENOMEM;
1178 }
1179
1180 /**
1181  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1182  * @adapter: pointer to adapter for which debug features should be unregistered
1183  */
1184 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1185 {
1186         debug_unregister(adapter->dbf->scsi_dbf);
1187         debug_unregister(adapter->dbf->san_dbf);
1188         debug_unregister(adapter->dbf->hba_dbf);
1189         debug_unregister(adapter->dbf->rec_dbf);
1190         kfree(adapter->dbf);
1191         adapter->dbf = NULL;
1192 }