drivers/s390/scsi/zfcp_dbf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Debug traces for zfcp.
   5  *
   6  * Copyright IBM Corporation 2002, 2008
   7  */
   8
   9 #include <linux/ctype.h>
  10 #include <asm/debug.h>
  11 #include "zfcp_ext.h"
  12
  13 static u32 dbfsize = 4;
  14
  15 module_param(dbfsize, uint, 0400);
  16 MODULE_PARM_DESC(dbfsize,
  17                  "number of pages for each debug feature area (default 4)");
  18
  19 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  20                              int level, char *from, int from_len)
  21 {
  22         int offset;
  23         struct zfcp_dbf_dump *dump = to;
  24         int room = to_len - sizeof(*dump);
  25
  26         for (offset = 0; offset < from_len; offset += dump->size) {
  27                 memset(to, 0, to_len);
  28                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  29                 dump->total_size = from_len;
  30                 dump->offset = offset;
  31                 dump->size = min(from_len - offset, room);
  32                 memcpy(dump->data, from + offset, dump->size);
  33                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
  34         }
  35 }
  36
  37 /* FIXME: this duplicate this code in s390 debug feature */
  38 static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
  39 {
  40         unsigned long long sec;
  41
  42         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  43         sec = stck >> 12;
  44         do_div(sec, 1000000);
  45         time->tv_sec = sec;
  46         stck -= (sec * 1000000) << 12;
  47         time->tv_nsec = ((stck * 1000) >> 12);
  48 }
  49
  50 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  51 {
  52         int i;
  53
  54         *p += sprintf(*p, "%-24s", label);
  55         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  56                 *p += sprintf(*p, "%c", tag[i]);
  57         *p += sprintf(*p, "\n");
  58 }
  59
  60 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  61 {
  62         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  63 }
  64
  65 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  66 {
  67         va_list arg;
  68
  69         *buf += sprintf(*buf, "%-24s", s);
  70         va_start(arg, format);
  71         *buf += vsprintf(*buf, format, arg);
  72         va_end(arg);
  73         *buf += sprintf(*buf, "\n");
  74 }
  75
  76 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  77                           int buflen, int offset, int total_size)
  78 {
  79         if (!offset)
  80                 *p += sprintf(*p, "%-24s  ", label);
  81         while (buflen--) {
  82                 if (offset > 0) {
  83                         if ((offset % 32) == 0)
  84                                 *p += sprintf(*p, "\n%-24c  ", ' ');
  85                         else if ((offset % 4) == 0)
  86                                 *p += sprintf(*p, " ");
  87                 }
  88                 *p += sprintf(*p, "%02x", *buffer++);
  89                 if (++offset == total_size) {
  90                         *p += sprintf(*p, "\n");
  91                         break;
  92                 }
  93         }
  94         if (!total_size)
  95                 *p += sprintf(*p, "\n");
  96 }
  97
  98 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
  99                                 int area, debug_entry_t *entry, char *out_buf)
 100 {
 101         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 102         struct timespec t;
 103         char *p = out_buf;
 104
 105         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 106                 zfcp_dbf_timestamp(entry->id.stck, &t);
 107                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 108                              t.tv_sec, t.tv_nsec);
 109                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 110         } else  {
 111                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
 112                               dump->total_size);
 113                 if ((dump->offset + dump->size) == dump->total_size)
 114                         p += sprintf(p, "\n");
 115         }
 116         return p - out_buf;
 117 }
 118
 119 /**
 120  * zfcp_hba_dbf_event_fsf_response - trace event for request completion
 121  * @fsf_req: request that has been completed
 122  */
 123 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 124 {
 125         struct zfcp_adapter *adapter = fsf_req->adapter;
 126         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 127         union fsf_prot_status_qual *prot_status_qual =
 128                                         &qtcb->prefix.prot_status_qual;
 129         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 130         struct scsi_cmnd *scsi_cmnd;
 131         struct zfcp_port *port;
 132         struct zfcp_unit *unit;
 133         struct zfcp_send_els *send_els;
 134         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 135         struct zfcp_hba_dbf_record_response *response = &rec->u.response;
 136         int level;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 140         memset(rec, 0, sizeof(*rec));
 141         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 142
 143         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 144             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 145                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 146                 level = 1;
 147         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 148                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 149                 level = 1;
 150         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 151                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 152                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 153                 level = 4;
 154         } else if (qtcb->header.log_length) {
 155                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
 156                 level = 5;
 157         } else {
 158                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 159                 level = 6;
 160         }
 161
 162         response->fsf_command = fsf_req->fsf_command;
 163         response->fsf_reqid = (unsigned long)fsf_req;
 164         response->fsf_seqno = fsf_req->seq_no;
 165         response->fsf_issued = fsf_req->issued;
 166         response->fsf_prot_status = qtcb->prefix.prot_status;
 167         response->fsf_status = qtcb->header.fsf_status;
 168         memcpy(response->fsf_prot_status_qual,
 169                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 170         memcpy(response->fsf_status_qual,
 171                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 172         response->fsf_req_status = fsf_req->status;
 173         response->sbal_first = fsf_req->sbal_first;
 174         response->sbal_last = fsf_req->sbal_last;
 175         response->sbal_response = fsf_req->sbal_response;
 176         response->pool = fsf_req->pool != NULL;
 177         response->erp_action = (unsigned long)fsf_req->erp_action;
 178
 179         switch (fsf_req->fsf_command) {
 180         case FSF_QTCB_FCP_CMND:
 181                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 182                         break;
 183                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 184                 if (scsi_cmnd) {
 185                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 186                         response->u.fcp.serial = scsi_cmnd->serial_number;
 187                 }
 188                 break;
 189
 190         case FSF_QTCB_OPEN_PORT_WITH_DID:
 191         case FSF_QTCB_CLOSE_PORT:
 192         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 193                 port = (struct zfcp_port *)fsf_req->data;
 194                 response->u.port.wwpn = port->wwpn;
 195                 response->u.port.d_id = port->d_id;
 196                 response->u.port.port_handle = qtcb->header.port_handle;
 197                 break;
 198
 199         case FSF_QTCB_OPEN_LUN:
 200         case FSF_QTCB_CLOSE_LUN:
 201                 unit = (struct zfcp_unit *)fsf_req->data;
 202                 port = unit->port;
 203                 response->u.unit.wwpn = port->wwpn;
 204                 response->u.unit.fcp_lun = unit->fcp_lun;
 205                 response->u.unit.port_handle = qtcb->header.port_handle;
 206                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 207                 break;
 208
 209         case FSF_QTCB_SEND_ELS:
 210                 send_els = (struct zfcp_send_els *)fsf_req->data;
 211                 response->u.els.d_id = qtcb->bottom.support.d_id;
 212                 response->u.els.ls_code = send_els->ls_code >> 24;
 213                 break;
 214
 215         case FSF_QTCB_ABORT_FCP_CMND:
 216         case FSF_QTCB_SEND_GENERIC:
 217         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 218         case FSF_QTCB_EXCHANGE_PORT_DATA:
 219         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 220         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 221                 break;
 222         }
 223
 224         debug_event(adapter->hba_dbf, level, rec, sizeof(*rec));
 225
 226         /* have fcp channel microcode fixed to use as little as possible */
 227         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 228                 /* adjust length skipping trailing zeros */
 229                 char *buf = (char *)qtcb + qtcb->header.log_start;
 230                 int len = qtcb->header.log_length;
 231                 for (; len && !buf[len - 1]; len--);
 232                 zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
 233                                  buf, len);
 234         }
 235
 236         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 237 }
 238
 239 /**
 240  * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
 241  * @tag: tag indicating which kind of unsolicited status has been received
 242  * @adapter: adapter that has issued the unsolicited status buffer
 243  * @status_buffer: buffer containing payload of unsolicited status
 244  */
 245 void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 246                                   struct fsf_status_read_buffer *status_buffer)
 247 {
 248         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 249         unsigned long flags;
 250
 251         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 252         memset(rec, 0, sizeof(*rec));
 253         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 254         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 255
 256         rec->u.status.failed = atomic_read(&adapter->stat_miss);
 257         if (status_buffer != NULL) {
 258                 rec->u.status.status_type = status_buffer->status_type;
 259                 rec->u.status.status_subtype = status_buffer->status_subtype;
 260                 memcpy(&rec->u.status.queue_designator,
 261                        &status_buffer->queue_designator,
 262                        sizeof(struct fsf_queue_designator));
 263
 264                 switch (status_buffer->status_type) {
 265                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 266                         rec->u.status.payload_size =
 267                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 268                         break;
 269
 270                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 271                         rec->u.status.payload_size =
 272                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 273                         break;
 274
 275                 case FSF_STATUS_READ_LINK_DOWN:
 276                         switch (status_buffer->status_subtype) {
 277                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 278                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 279                                 rec->u.status.payload_size =
 280                                         sizeof(struct fsf_link_down_info);
 281                         }
 282                         break;
 283
 284                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 285                         rec->u.status.payload_size =
 286                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 287                         break;
 288                 }
 289                 memcpy(&rec->u.status.payload,
 290                        &status_buffer->payload, rec->u.status.payload_size);
 291         }
 292
 293         debug_event(adapter->hba_dbf, 2, rec, sizeof(*rec));
 294         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 295 }
 296
 297 /**
 298  * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
 299  * @adapter: adapter affected by this QDIO related event
 300  * @qdio_error: as passed by qdio module
 301  * @sbal_index: first buffer with error condition, as passed by qdio module
 302  * @sbal_count: number of buffers affected, as passed by qdio module
 303  */
 304 void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
 305                              unsigned int qdio_error, int sbal_index,
 306                              int sbal_count)
 307 {
 308         struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
 309         unsigned long flags;
 310
 311         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 312         memset(r, 0, sizeof(*r));
 313         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 314         r->u.qdio.qdio_error = qdio_error;
 315         r->u.qdio.sbal_index = sbal_index;
 316         r->u.qdio.sbal_count = sbal_count;
 317         debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
 318         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 319 }
 320
 321 /**
 322  * zfcp_hba_dbf_event_berr - trace event for bit error threshold
 323  * @adapter: adapter affected by this QDIO related event
 324  * @req: fsf request
 325  */
 326 void zfcp_hba_dbf_event_berr(struct zfcp_adapter *adapter,
 327                              struct zfcp_fsf_req *req)
 328 {
 329         struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
 330         struct fsf_status_read_buffer *sr_buf = req->data;
 331         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 332         unsigned long flags;
 333
 334         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 335         memset(r, 0, sizeof(*r));
 336         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 337         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
 338         debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
 339         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 340 }
 341 static void zfcp_hba_dbf_view_response(char **p,
 342                                        struct zfcp_hba_dbf_record_response *r)
 343 {
 344         struct timespec t;
 345
 346         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 347         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 348         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 349         zfcp_dbf_timestamp(r->fsf_issued, &t);
 350         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 351         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 352         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 353         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 354                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 355         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 356                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 357         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 358         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 359         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 360         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
 361         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 362
 363         switch (r->fsf_command) {
 364         case FSF_QTCB_FCP_CMND:
 365                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 366                         break;
 367                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
 368                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
 369                 p += sprintf(*p, "\n");
 370                 break;
 371
 372         case FSF_QTCB_OPEN_PORT_WITH_DID:
 373         case FSF_QTCB_CLOSE_PORT:
 374         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 375                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
 376                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
 377                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 378                 break;
 379
 380         case FSF_QTCB_OPEN_LUN:
 381         case FSF_QTCB_CLOSE_LUN:
 382                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
 383                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
 384                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
 385                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 386                 break;
 387
 388         case FSF_QTCB_SEND_ELS:
 389                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
 390                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
 391                 break;
 392
 393         case FSF_QTCB_ABORT_FCP_CMND:
 394         case FSF_QTCB_SEND_GENERIC:
 395         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 396         case FSF_QTCB_EXCHANGE_PORT_DATA:
 397         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 398         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 399                 break;
 400         }
 401 }
 402
 403 static void zfcp_hba_dbf_view_status(char **p,
 404                                      struct zfcp_hba_dbf_record_status *r)
 405 {
 406         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 407         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 408         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 409         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 410                       sizeof(struct fsf_queue_designator), 0,
 411                       sizeof(struct fsf_queue_designator));
 412         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 413                       r->payload_size);
 414 }
 415
 416 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
 417 {
 418         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_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 void zfcp_hba_dbf_view_berr(char **p, struct fsf_bit_error_payload *r)
 424 {
 425         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 426         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
 427         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
 428         zfcp_dbf_out(p, "prim_seq_err", "%d",
 429                      r->primitive_sequence_error_count);
 430         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
 431                      r->invalid_transmission_word_error_count);
 432         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
 433         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
 434                      r->primitive_sequence_event_timeout_count);
 435         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
 436                      r->elastic_buffer_overrun_error_count);
 437         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
 438                      r->advertised_receive_b2b_credit);
 439         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
 440                      r->current_receive_b2b_credit);
 441         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
 442                      r->advertised_transmit_b2b_credit);
 443         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
 444                      r->current_transmit_b2b_credit);
 445 }
 446
 447 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
 448                                     char *out_buf, const char *in_buf)
 449 {
 450         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
 451         char *p = out_buf;
 452
 453         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 454                 return 0;
 455
 456         zfcp_dbf_tag(&p, "tag", r->tag);
 457         if (isalpha(r->tag2[0]))
 458                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 459
 460         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 461                 zfcp_hba_dbf_view_response(&p, &r->u.response);
 462         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 463                 zfcp_hba_dbf_view_status(&p, &r->u.status);
 464         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 465                 zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
 466         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
 467                 zfcp_hba_dbf_view_berr(&p, &r->u.berr);
 468
 469         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 470                 p += sprintf(p, "\n");
 471         return p - out_buf;
 472 }
 473
 474 static struct debug_view zfcp_hba_dbf_view = {
 475         "structured",
 476         NULL,
 477         &zfcp_dbf_view_header,
 478         &zfcp_hba_dbf_view_format,
 479         NULL,
 480         NULL
 481 };
 482
 483 static const char *zfcp_rec_dbf_tags[] = {
 484         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 485         [ZFCP_REC_DBF_ID_TARGET] = "target",
 486         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 487         [ZFCP_REC_DBF_ID_ACTION] = "action",
 488 };
 489
 490 static const char *zfcp_rec_dbf_ids[] = {
 491         [1]     = "new",
 492         [2]     = "ready",
 493         [3]     = "kill",
 494         [4]     = "down sleep",
 495         [5]     = "down wakeup",
 496         [6]     = "down sleep ecd",
 497         [7]     = "down wakeup ecd",
 498         [8]     = "down sleep epd",
 499         [9]     = "down wakeup epd",
 500         [10]    = "online",
 501         [11]    = "operational",
 502         [12]    = "scsi slave destroy",
 503         [13]    = "propagate failed adapter",
 504         [14]    = "propagate failed port",
 505         [15]    = "block adapter",
 506         [16]    = "unblock adapter",
 507         [17]    = "block port",
 508         [18]    = "unblock port",
 509         [19]    = "block unit",
 510         [20]    = "unblock unit",
 511         [21]    = "unit recovery failed",
 512         [22]    = "port recovery failed",
 513         [23]    = "adapter recovery failed",
 514         [24]    = "qdio queues down",
 515         [25]    = "p2p failed",
 516         [26]    = "nameserver lookup failed",
 517         [27]    = "nameserver port failed",
 518         [28]    = "link up",
 519         [29]    = "link down",
 520         [30]    = "link up status read",
 521         [31]    = "open port failed",
 522         [32]    = "open port failed",
 523         [33]    = "close port",
 524         [34]    = "open unit failed",
 525         [35]    = "exclusive open unit failed",
 526         [36]    = "shared open unit failed",
 527         [37]    = "link down",
 528         [38]    = "link down status read no link",
 529         [39]    = "link down status read fdisc login",
 530         [40]    = "link down status read firmware update",
 531         [41]    = "link down status read unknown reason",
 532         [42]    = "link down ecd incomplete",
 533         [43]    = "link down epd incomplete",
 534         [44]    = "sysfs adapter recovery",
 535         [45]    = "sysfs port recovery",
 536         [46]    = "sysfs unit recovery",
 537         [47]    = "port boxed abort",
 538         [48]    = "unit boxed abort",
 539         [49]    = "port boxed ct",
 540         [50]    = "port boxed close physical",
 541         [51]    = "port boxed open unit",
 542         [52]    = "port boxed close unit",
 543         [53]    = "port boxed fcp",
 544         [54]    = "unit boxed fcp",
 545         [55]    = "port access denied",
 546         [56]    = "",
 547         [57]    = "",
 548         [58]    = "",
 549         [59]    = "unit access denied",
 550         [60]    = "shared unit access denied open unit",
 551         [61]    = "",
 552         [62]    = "request timeout",
 553         [63]    = "adisc link test reject or timeout",
 554         [64]    = "adisc link test d_id changed",
 555         [65]    = "adisc link test failed",
 556         [66]    = "recovery out of memory",
 557         [67]    = "adapter recovery repeated after state change",
 558         [68]    = "port recovery repeated after state change",
 559         [69]    = "unit recovery repeated after state change",
 560         [70]    = "port recovery follow-up after successful adapter recovery",
 561         [71]    = "adapter recovery escalation after failed adapter recovery",
 562         [72]    = "port recovery follow-up after successful physical port "
 563                   "recovery",
 564         [73]    = "adapter recovery escalation after failed physical port "
 565                   "recovery",
 566         [74]    = "unit recovery follow-up after successful port recovery",
 567         [75]    = "physical port recovery escalation after failed port "
 568                   "recovery",
 569         [76]    = "port recovery escalation after failed unit recovery",
 570         [77]    = "",
 571         [78]    = "duplicate request id",
 572         [79]    = "link down",
 573         [80]    = "exclusive read-only unit access unsupported",
 574         [81]    = "shared read-write unit access unsupported",
 575         [82]    = "incoming rscn",
 576         [83]    = "incoming wwpn",
 577         [84]    = "wka port handle not valid close port",
 578         [85]    = "online",
 579         [86]    = "offline",
 580         [87]    = "ccw device gone",
 581         [88]    = "ccw device no path",
 582         [89]    = "ccw device operational",
 583         [90]    = "ccw device shutdown",
 584         [91]    = "sysfs port addition",
 585         [92]    = "sysfs port removal",
 586         [93]    = "sysfs adapter recovery",
 587         [94]    = "sysfs unit addition",
 588         [95]    = "sysfs unit removal",
 589         [96]    = "sysfs port recovery",
 590         [97]    = "sysfs unit recovery",
 591         [98]    = "sequence number mismatch",
 592         [99]    = "link up",
 593         [100]   = "error state",
 594         [101]   = "status read physical port closed",
 595         [102]   = "link up status read",
 596         [103]   = "too many failed status read buffers",
 597         [104]   = "port handle not valid abort",
 598         [105]   = "lun handle not valid abort",
 599         [106]   = "port handle not valid ct",
 600         [107]   = "port handle not valid close port",
 601         [108]   = "port handle not valid close physical port",
 602         [109]   = "port handle not valid open unit",
 603         [110]   = "port handle not valid close unit",
 604         [111]   = "lun handle not valid close unit",
 605         [112]   = "port handle not valid fcp",
 606         [113]   = "lun handle not valid fcp",
 607         [114]   = "handle mismatch fcp",
 608         [115]   = "lun not valid fcp",
 609         [116]   = "qdio send failed",
 610         [117]   = "version mismatch",
 611         [118]   = "incompatible qtcb type",
 612         [119]   = "unknown protocol status",
 613         [120]   = "unknown fsf command",
 614         [121]   = "no recommendation for status qualifier",
 615         [122]   = "status read physical port closed in error",
 616         [123]   = "fc service class not supported",
 617         [124]   = "",
 618         [125]   = "need newer zfcp",
 619         [126]   = "need newer microcode",
 620         [127]   = "arbitrated loop not supported",
 621         [128]   = "",
 622         [129]   = "qtcb size mismatch",
 623         [130]   = "unknown fsf status ecd",
 624         [131]   = "fcp request too big",
 625         [132]   = "",
 626         [133]   = "data direction not valid fcp",
 627         [134]   = "command length not valid fcp",
 628         [135]   = "status read act update",
 629         [136]   = "status read cfdc update",
 630         [137]   = "hbaapi port open",
 631         [138]   = "hbaapi unit open",
 632         [139]   = "hbaapi unit shutdown",
 633         [140]   = "qdio error outbound",
 634         [141]   = "scsi host reset",
 635         [142]   = "dismissing fsf request for recovery action",
 636         [143]   = "recovery action timed out",
 637         [144]   = "recovery action gone",
 638         [145]   = "recovery action being processed",
 639         [146]   = "recovery action ready for next step",
 640         [147]   = "qdio error inbound",
 641         [148]   = "nameserver needed for port scan",
 642         [149]   = "port scan",
 643         [150]   = "ptp attach",
 644         [151]   = "port validation failed",
 645 };
 646
 647 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
 648                                     char *buf, const char *_rec)
 649 {
 650         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
 651         char *p = buf;
 652
 653         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
 654         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
 655         zfcp_dbf_out(&p, "id", "%d", r->id2);
 656         switch (r->id) {
 657         case ZFCP_REC_DBF_ID_THREAD:
 658                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 659                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 660                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 661                 break;
 662         case ZFCP_REC_DBF_ID_TARGET:
 663                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 664                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 665                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 666                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 667                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 668                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 669                 break;
 670         case ZFCP_REC_DBF_ID_TRIGGER:
 671                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 672                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 673                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 674                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 675                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 676                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 677                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 678                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 679                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 680                 break;
 681         case ZFCP_REC_DBF_ID_ACTION:
 682                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 683                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 684                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 685                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 686                 break;
 687         }
 688         p += sprintf(p, "\n");
 689         return p - buf;
 690 }
 691
 692 static struct debug_view zfcp_rec_dbf_view = {
 693         "structured",
 694         NULL,
 695         &zfcp_dbf_view_header,
 696         &zfcp_rec_dbf_view_format,
 697         NULL,
 698         NULL
 699 };
 700
 701 /**
 702  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 703  * @id2: identifier for event
 704  * @adapter: adapter
 705  * This function assumes that the caller is holding erp_lock.
 706  */
 707 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter)
 708 {
 709         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 710         unsigned long flags = 0;
 711         struct list_head *entry;
 712         unsigned ready = 0, running = 0, total;
 713
 714         list_for_each(entry, &adapter->erp_ready_head)
 715                 ready++;
 716         list_for_each(entry, &adapter->erp_running_head)
 717                 running++;
 718         total = adapter->erp_total_count;
 719
 720         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 721         memset(r, 0, sizeof(*r));
 722         r->id = ZFCP_REC_DBF_ID_THREAD;
 723         r->id2 = id2;
 724         r->u.thread.total = total;
 725         r->u.thread.ready = ready;
 726         r->u.thread.running = running;
 727         debug_event(adapter->rec_dbf, 6, r, sizeof(*r));
 728         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 729 }
 730
 731 /**
 732  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 733  * @id2: identifier for event
 734  * @adapter: adapter
 735  * This function assumes that the caller does not hold erp_lock.
 736  */
 737 void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter)
 738 {
 739         unsigned long flags;
 740
 741         read_lock_irqsave(&adapter->erp_lock, flags);
 742         zfcp_rec_dbf_event_thread(id2, adapter);
 743         read_unlock_irqrestore(&adapter->erp_lock, flags);
 744 }
 745
 746 static void zfcp_rec_dbf_event_target(u8 id2, void *ref,
 747                                       struct zfcp_adapter *adapter,
 748                                       atomic_t *status, atomic_t *erp_count,
 749                                       u64 wwpn, u32 d_id, u64 fcp_lun)
 750 {
 751         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 752         unsigned long flags;
 753
 754         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 755         memset(r, 0, sizeof(*r));
 756         r->id = ZFCP_REC_DBF_ID_TARGET;
 757         r->id2 = id2;
 758         r->u.target.ref = (unsigned long)ref;
 759         r->u.target.status = atomic_read(status);
 760         r->u.target.wwpn = wwpn;
 761         r->u.target.d_id = d_id;
 762         r->u.target.fcp_lun = fcp_lun;
 763         r->u.target.erp_count = atomic_read(erp_count);
 764         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
 765         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 766 }
 767
 768 /**
 769  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
 770  * @id: identifier for trigger of state change
 771  * @ref: additional reference (e.g. request)
 772  * @adapter: adapter
 773  */
 774 void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *adapter)
 775 {
 776         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
 777                                   &adapter->erp_counter, 0, 0, 0);
 778 }
 779
 780 /**
 781  * zfcp_rec_dbf_event_port - trace event for port state change
 782  * @id: identifier for trigger of state change
 783  * @ref: additional reference (e.g. request)
 784  * @port: port
 785  */
 786 void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port)
 787 {
 788         struct zfcp_adapter *adapter = port->adapter;
 789
 790         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
 791                                   &port->erp_counter, port->wwpn, port->d_id,
 792                                   0);
 793 }
 794
 795 /**
 796  * zfcp_rec_dbf_event_unit - trace event for unit state change
 797  * @id: identifier for trigger of state change
 798  * @ref: additional reference (e.g. request)
 799  * @unit: unit
 800  */
 801 void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit)
 802 {
 803         struct zfcp_port *port = unit->port;
 804         struct zfcp_adapter *adapter = port->adapter;
 805
 806         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
 807                                   &unit->erp_counter, port->wwpn, port->d_id,
 808                                   unit->fcp_lun);
 809 }
 810
 811 /**
 812  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
 813  * @id2: identifier for error recovery trigger
 814  * @ref: additional reference (e.g. request)
 815  * @want: originally requested error recovery action
 816  * @need: error recovery action actually initiated
 817  * @action: address of error recovery action struct
 818  * @adapter: adapter
 819  * @port: port
 820  * @unit: unit
 821  */
 822 void zfcp_rec_dbf_event_trigger(u8 id2, void *ref, u8 want, u8 need,
 823                                 void *action, struct zfcp_adapter *adapter,
 824                                 struct zfcp_port *port, struct zfcp_unit *unit)
 825 {
 826         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 827         unsigned long flags;
 828
 829         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 830         memset(r, 0, sizeof(*r));
 831         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 832         r->id2 = id2;
 833         r->u.trigger.ref = (unsigned long)ref;
 834         r->u.trigger.want = want;
 835         r->u.trigger.need = need;
 836         r->u.trigger.action = (unsigned long)action;
 837         r->u.trigger.as = atomic_read(&adapter->status);
 838         if (port) {
 839                 r->u.trigger.ps = atomic_read(&port->status);
 840                 r->u.trigger.wwpn = port->wwpn;
 841         }
 842         if (unit) {
 843                 r->u.trigger.us = atomic_read(&unit->status);
 844                 r->u.trigger.fcp_lun = unit->fcp_lun;
 845         }
 846         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
 847         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 848 }
 849
 850 /**
 851  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
 852  * @id2: identifier
 853  * @erp_action: error recovery action struct pointer
 854  */
 855 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
 856 {
 857         struct zfcp_adapter *adapter = erp_action->adapter;
 858         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 859         unsigned long flags;
 860
 861         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 862         memset(r, 0, sizeof(*r));
 863         r->id = ZFCP_REC_DBF_ID_ACTION;
 864         r->id2 = id2;
 865         r->u.action.action = (unsigned long)erp_action;
 866         r->u.action.status = erp_action->status;
 867         r->u.action.step = erp_action->step;
 868         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
 869         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
 870         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 871 }
 872
 873 /**
 874  * zfcp_san_dbf_event_ct_request - trace event for issued CT request
 875  * @fsf_req: request containing issued CT data
 876  */
 877 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 878 {
 879         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 880         struct zfcp_wka_port *wka_port = ct->wka_port;
 881         struct zfcp_adapter *adapter = wka_port->adapter;
 882         struct ct_hdr *hdr = sg_virt(ct->req);
 883         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
 884         struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
 885         int level = 3;
 886         unsigned long flags;
 887
 888         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 889         memset(r, 0, sizeof(*r));
 890         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 891         r->fsf_reqid = (unsigned long)fsf_req;
 892         r->fsf_seqno = fsf_req->seq_no;
 893         r->s_id = fc_host_port_id(adapter->scsi_host);
 894         r->d_id = wka_port->d_id;
 895         oct->cmd_req_code = hdr->cmd_rsp_code;
 896         oct->revision = hdr->revision;
 897         oct->gs_type = hdr->gs_type;
 898         oct->gs_subtype = hdr->gs_subtype;
 899         oct->options = hdr->options;
 900         oct->max_res_size = hdr->max_res_size;
 901         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 902                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 903         debug_event(adapter->san_dbf, level, r, sizeof(*r));
 904         zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
 905                          (void *)hdr + sizeof(struct ct_hdr), oct->len);
 906         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 907 }
 908
 909 /**
 910  * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
 911  * @fsf_req: request containing CT response
 912  */
 913 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 914 {
 915         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 916         struct zfcp_wka_port *wka_port = ct->wka_port;
 917         struct zfcp_adapter *adapter = wka_port->adapter;
 918         struct ct_hdr *hdr = sg_virt(ct->resp);
 919         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
 920         struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
 921         int level = 3;
 922         unsigned long flags;
 923
 924         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 925         memset(r, 0, sizeof(*r));
 926         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 927         r->fsf_reqid = (unsigned long)fsf_req;
 928         r->fsf_seqno = fsf_req->seq_no;
 929         r->s_id = wka_port->d_id;
 930         r->d_id = fc_host_port_id(adapter->scsi_host);
 931         rct->cmd_rsp_code = hdr->cmd_rsp_code;
 932         rct->revision = hdr->revision;
 933         rct->reason_code = hdr->reason_code;
 934         rct->expl = hdr->reason_code_expl;
 935         rct->vendor_unique = hdr->vendor_unique;
 936         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 937                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 938         debug_event(adapter->san_dbf, level, r, sizeof(*r));
 939         zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
 940                          (void *)hdr + sizeof(struct ct_hdr), rct->len);
 941         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 942 }
 943
 944 static void zfcp_san_dbf_event_els(const char *tag, int level,
 945                                    struct zfcp_fsf_req *fsf_req, u32 s_id,
 946                                    u32 d_id, u8 ls_code, void *buffer,
 947                                    int buflen)
 948 {
 949         struct zfcp_adapter *adapter = fsf_req->adapter;
 950         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 951         unsigned long flags;
 952
 953         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 954         memset(rec, 0, sizeof(*rec));
 955         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 956         rec->fsf_reqid = (unsigned long)fsf_req;
 957         rec->fsf_seqno = fsf_req->seq_no;
 958         rec->s_id = s_id;
 959         rec->d_id = d_id;
 960         rec->u.els.ls_code = ls_code;
 961         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
 962         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
 963                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
 964         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 965 }
 966
 967 /**
 968  * zfcp_san_dbf_event_els_request - trace event for issued ELS
 969  * @fsf_req: request containing issued ELS
 970  */
 971 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 972 {
 973         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 974
 975         zfcp_san_dbf_event_els("oels", 2, fsf_req,
 976                                fc_host_port_id(els->adapter->scsi_host),
 977                                els->d_id, *(u8 *) sg_virt(els->req),
 978                                sg_virt(els->req), els->req->length);
 979 }
 980
 981 /**
 982  * zfcp_san_dbf_event_els_response - trace event for completed ELS
 983  * @fsf_req: request containing ELS response
 984  */
 985 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 986 {
 987         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 988
 989         zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
 990                                fc_host_port_id(els->adapter->scsi_host),
 991                                *(u8 *)sg_virt(els->req), sg_virt(els->resp),
 992                                els->resp->length);
 993 }
 994
 995 /**
 996  * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
 997  * @fsf_req: request containing unsolicited status buffer with incoming ELS
 998  */
 999 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
1000 {
1001         struct zfcp_adapter *adapter = fsf_req->adapter;
1002         struct fsf_status_read_buffer *buf =
1003                         (struct fsf_status_read_buffer *)fsf_req->data;
1004         int length = (int)buf->length -
1005                      (int)((void *)&buf->payload - (void *)buf);
1006
1007         zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
1008                                fc_host_port_id(adapter->scsi_host),
1009                                buf->payload.data[0], (void *)buf->payload.data,
1010                                length);
1011 }
1012
1013 static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
1014                                     char *out_buf, const char *in_buf)
1015 {
1016         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
1017         char *p = out_buf;
1018
1019         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1020                 return 0;
1021
1022         zfcp_dbf_tag(&p, "tag", r->tag);
1023         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1024         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1025         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
1026         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
1027
1028         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
1029                 struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
1030                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
1031                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1032                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
1033                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
1034                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
1035                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
1036         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
1037                 struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
1038                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
1039                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1040                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
1041                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
1042                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
1043         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1044                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1045                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1046                 struct zfcp_san_dbf_record_els *els = &r->u.els;
1047                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
1048         }
1049         return p - out_buf;
1050 }
1051
1052 static struct debug_view zfcp_san_dbf_view = {
1053         "structured",
1054         NULL,
1055         &zfcp_dbf_view_header,
1056         &zfcp_san_dbf_view_format,
1057         NULL,
1058         NULL
1059 };
1060
1061 static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
1062                                 struct zfcp_adapter *adapter,
1063                                 struct scsi_cmnd *scsi_cmnd,
1064                                 struct zfcp_fsf_req *fsf_req,
1065                                 unsigned long old_req_id)
1066 {
1067         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1068         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1069         unsigned long flags;
1070         struct fcp_rsp_iu *fcp_rsp;
1071         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1072         int offset = 0, buflen = 0;
1073
1074         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1075         do {
1076                 memset(rec, 0, sizeof(*rec));
1077                 if (offset == 0) {
1078                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1079                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1080                         if (scsi_cmnd != NULL) {
1081                                 if (scsi_cmnd->device) {
1082                                         rec->scsi_id = scsi_cmnd->device->id;
1083                                         rec->scsi_lun = scsi_cmnd->device->lun;
1084                                 }
1085                                 rec->scsi_result = scsi_cmnd->result;
1086                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1087                                 rec->scsi_serial = scsi_cmnd->serial_number;
1088                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
1089                                         min((int)scsi_cmnd->cmd_len,
1090                                                 ZFCP_DBF_SCSI_OPCODE));
1091                                 rec->scsi_retries = scsi_cmnd->retries;
1092                                 rec->scsi_allowed = scsi_cmnd->allowed;
1093                         }
1094                         if (fsf_req != NULL) {
1095                                 fcp_rsp = (struct fcp_rsp_iu *)
1096                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1097                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
1098                                 fcp_sns_info =
1099                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1100
1101                                 rec->rsp_validity = fcp_rsp->validity.value;
1102                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
1103                                 rec->rsp_resid = fcp_rsp->fcp_resid;
1104                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1105                                         rec->rsp_code = *(fcp_rsp_info + 3);
1106                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1107                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1108                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1109                                         rec->sns_info_len = buflen;
1110                                         memcpy(rec->sns_info, fcp_sns_info,
1111                                                min(buflen,
1112                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1113                                         offset += min(buflen,
1114                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1115                                 }
1116
1117                                 rec->fsf_reqid = (unsigned long)fsf_req;
1118                                 rec->fsf_seqno = fsf_req->seq_no;
1119                                 rec->fsf_issued = fsf_req->issued;
1120                         }
1121                         rec->old_fsf_reqid = old_req_id;
1122                 } else {
1123                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1124                         dump->total_size = buflen;
1125                         dump->offset = offset;
1126                         dump->size = min(buflen - offset,
1127                                          (int)sizeof(struct
1128                                                      zfcp_scsi_dbf_record) -
1129                                          (int)sizeof(struct zfcp_dbf_dump));
1130                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1131                         offset += dump->size;
1132                 }
1133                 debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
1134         } while (offset < buflen);
1135         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1136 }
1137
1138 /**
1139  * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
1140  * @tag: tag indicating success or failure of SCSI command
1141  * @level: trace level applicable for this event
1142  * @adapter: adapter that has been used to issue the SCSI command
1143  * @scsi_cmnd: SCSI command pointer
1144  * @fsf_req: request used to issue SCSI command (might be NULL)
1145  */
1146 void zfcp_scsi_dbf_event_result(const char *tag, int level,
1147                                 struct zfcp_adapter *adapter,
1148                                 struct scsi_cmnd *scsi_cmnd,
1149                                 struct zfcp_fsf_req *fsf_req)
1150 {
1151         zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
1152 }
1153
1154 /**
1155  * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
1156  * @tag: tag indicating success or failure of abort operation
1157  * @adapter: adapter thas has been used to issue SCSI command to be aborted
1158  * @scsi_cmnd: SCSI command to be aborted
1159  * @new_fsf_req: request containing abort (might be NULL)
1160  * @old_req_id: identifier of request containg SCSI command to be aborted
1161  */
1162 void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1163                                struct scsi_cmnd *scsi_cmnd,
1164                                struct zfcp_fsf_req *new_fsf_req,
1165                                unsigned long old_req_id)
1166 {
1167         zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
1168                             old_req_id);
1169 }
1170
1171 /**
1172  * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
1173  * @tag: tag indicating success or failure of reset operation
1174  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
1175  * @unit: unit that needs reset
1176  * @scsi_cmnd: SCSI command which caused this error recovery
1177  */
1178 void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
1179                                   struct zfcp_unit *unit,
1180                                   struct scsi_cmnd *scsi_cmnd)
1181 {
1182         zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
1183                             unit->port->adapter, scsi_cmnd, NULL, 0);
1184 }
1185
1186 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
1187                                      char *out_buf, const char *in_buf)
1188 {
1189         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1190         struct timespec t;
1191         char *p = out_buf;
1192
1193         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1194                 return 0;
1195
1196         zfcp_dbf_tag(&p, "tag", r->tag);
1197         zfcp_dbf_tag(&p, "tag2", r->tag2);
1198         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1199         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1200         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1201         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1202         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1203         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1204                       0, ZFCP_DBF_SCSI_OPCODE);
1205         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1206         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1207         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1208                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
1209         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1210         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1211         zfcp_dbf_timestamp(r->fsf_issued, &t);
1212         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1213
1214         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1215                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
1216                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
1217                              r->rsp_scsi_status);
1218                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
1219                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
1220                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
1221                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
1222                               min((int)r->sns_info_len,
1223                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1224                               r->sns_info_len);
1225         }
1226         p += sprintf(p, "\n");
1227         return p - out_buf;
1228 }
1229
1230 static struct debug_view zfcp_scsi_dbf_view = {
1231         "structured",
1232         NULL,
1233         &zfcp_dbf_view_header,
1234         &zfcp_scsi_dbf_view_format,
1235         NULL,
1236         NULL
1237 };
1238
1239 /**
1240  * zfcp_adapter_debug_register - registers debug feature for an adapter
1241  * @adapter: pointer to adapter for which debug features should be registered
1242  * return: -ENOMEM on error, 0 otherwise
1243  */
1244 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1245 {
1246         char dbf_name[DEBUG_MAX_NAME_LEN];
1247
1248         /* debug feature area which records recovery activity */
1249         sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
1250         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1251                                           sizeof(struct zfcp_rec_dbf_record));
1252         if (!adapter->rec_dbf)
1253                 goto failed;
1254         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1255         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1256         debug_set_level(adapter->rec_dbf, 3);
1257
1258         /* debug feature area which records HBA (FSF and QDIO) conditions */
1259         sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
1260         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1261                                           sizeof(struct zfcp_hba_dbf_record));
1262         if (!adapter->hba_dbf)
1263                 goto failed;
1264         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1265         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1266         debug_set_level(adapter->hba_dbf, 3);
1267
1268         /* debug feature area which records SAN command failures and recovery */
1269         sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
1270         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1271                                           sizeof(struct zfcp_san_dbf_record));
1272         if (!adapter->san_dbf)
1273                 goto failed;
1274         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1275         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1276         debug_set_level(adapter->san_dbf, 6);
1277
1278         /* debug feature area which records SCSI command failures and recovery */
1279         sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
1280         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1281                                            sizeof(struct zfcp_scsi_dbf_record));
1282         if (!adapter->scsi_dbf)
1283                 goto failed;
1284         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1285         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1286         debug_set_level(adapter->scsi_dbf, 3);
1287
1288         return 0;
1289
1290  failed:
1291         zfcp_adapter_debug_unregister(adapter);
1292
1293         return -ENOMEM;
1294 }
1295
1296 /**
1297  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1298  * @adapter: pointer to adapter for which debug features should be unregistered
1299  */
1300 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1301 {
1302         debug_unregister(adapter->scsi_dbf);
1303         debug_unregister(adapter->san_dbf);
1304         debug_unregister(adapter->hba_dbf);
1305         debug_unregister(adapter->rec_dbf);
1306         adapter->scsi_dbf = NULL;
1307         adapter->san_dbf = NULL;
1308         adapter->hba_dbf = NULL;
1309         adapter->rec_dbf = NULL;
1310 }