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 void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
 124                                 struct zfcp_fsf_req *fsf_req,
 125                                 struct zfcp_dbf *dbf)
 126 {
 127         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 128         union fsf_prot_status_qual *prot_status_qual =
 129                                         &qtcb->prefix.prot_status_qual;
 130         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 131         struct scsi_cmnd *scsi_cmnd;
 132         struct zfcp_port *port;
 133         struct zfcp_unit *unit;
 134         struct zfcp_send_els *send_els;
 135         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 136         struct zfcp_dbf_hba_record_response *response = &rec->u.response;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&dbf->hba_lock, flags);
 140         memset(rec, 0, sizeof(*rec));
 141         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 142         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 143
 144         response->fsf_command = fsf_req->fsf_command;
 145         response->fsf_reqid = fsf_req->req_id;
 146         response->fsf_seqno = fsf_req->seq_no;
 147         response->fsf_issued = fsf_req->issued;
 148         response->fsf_prot_status = qtcb->prefix.prot_status;
 149         response->fsf_status = qtcb->header.fsf_status;
 150         memcpy(response->fsf_prot_status_qual,
 151                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 152         memcpy(response->fsf_status_qual,
 153                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 154         response->fsf_req_status = fsf_req->status;
 155         response->sbal_first = fsf_req->queue_req.sbal_first;
 156         response->sbal_last = fsf_req->queue_req.sbal_last;
 157         response->sbal_response = fsf_req->queue_req.sbal_response;
 158         response->pool = fsf_req->pool != NULL;
 159         response->erp_action = (unsigned long)fsf_req->erp_action;
 160
 161         switch (fsf_req->fsf_command) {
 162         case FSF_QTCB_FCP_CMND:
 163                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 164                         break;
 165                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 166                 if (scsi_cmnd) {
 167                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 168                         response->u.fcp.serial = scsi_cmnd->serial_number;
 169                 }
 170                 break;
 171
 172         case FSF_QTCB_OPEN_PORT_WITH_DID:
 173         case FSF_QTCB_CLOSE_PORT:
 174         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 175                 port = (struct zfcp_port *)fsf_req->data;
 176                 response->u.port.wwpn = port->wwpn;
 177                 response->u.port.d_id = port->d_id;
 178                 response->u.port.port_handle = qtcb->header.port_handle;
 179                 break;
 180
 181         case FSF_QTCB_OPEN_LUN:
 182         case FSF_QTCB_CLOSE_LUN:
 183                 unit = (struct zfcp_unit *)fsf_req->data;
 184                 port = unit->port;
 185                 response->u.unit.wwpn = port->wwpn;
 186                 response->u.unit.fcp_lun = unit->fcp_lun;
 187                 response->u.unit.port_handle = qtcb->header.port_handle;
 188                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 189                 break;
 190
 191         case FSF_QTCB_SEND_ELS:
 192                 send_els = (struct zfcp_send_els *)fsf_req->data;
 193                 response->u.els.d_id = qtcb->bottom.support.d_id;
 194                 response->u.els.ls_code = send_els->ls_code >> 24;
 195                 break;
 196
 197         case FSF_QTCB_ABORT_FCP_CMND:
 198         case FSF_QTCB_SEND_GENERIC:
 199         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 200         case FSF_QTCB_EXCHANGE_PORT_DATA:
 201         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 202         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 203                 break;
 204         }
 205
 206         debug_event(dbf->hba, level, rec, sizeof(*rec));
 207
 208         /* have fcp channel microcode fixed to use as little as possible */
 209         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 210                 /* adjust length skipping trailing zeros */
 211                 char *buf = (char *)qtcb + qtcb->header.log_start;
 212                 int len = qtcb->header.log_length;
 213                 for (; len && !buf[len - 1]; len--);
 214                 zfcp_dbf_hexdump(dbf->hba, rec, sizeof(*rec), level, buf,
 215                                  len);
 216         }
 217
 218         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 219 }
 220
 221 void _zfcp_dbf_hba_fsf_unsol(const char *tag, int level, struct zfcp_dbf *dbf,
 222                              struct fsf_status_read_buffer *status_buffer)
 223 {
 224         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 225         unsigned long flags;
 226
 227         spin_lock_irqsave(&dbf->hba_lock, flags);
 228         memset(rec, 0, sizeof(*rec));
 229         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 230         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 231
 232         rec->u.status.failed = atomic_read(&dbf->adapter->stat_miss);
 233         if (status_buffer != NULL) {
 234                 rec->u.status.status_type = status_buffer->status_type;
 235                 rec->u.status.status_subtype = status_buffer->status_subtype;
 236                 memcpy(&rec->u.status.queue_designator,
 237                        &status_buffer->queue_designator,
 238                        sizeof(struct fsf_queue_designator));
 239
 240                 switch (status_buffer->status_type) {
 241                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 242                         rec->u.status.payload_size =
 243                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 244                         break;
 245
 246                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 247                         rec->u.status.payload_size =
 248                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 249                         break;
 250
 251                 case FSF_STATUS_READ_LINK_DOWN:
 252                         switch (status_buffer->status_subtype) {
 253                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 254                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 255                                 rec->u.status.payload_size =
 256                                         sizeof(struct fsf_link_down_info);
 257                         }
 258                         break;
 259
 260                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 261                         rec->u.status.payload_size =
 262                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 263                         break;
 264                 }
 265                 memcpy(&rec->u.status.payload,
 266                        &status_buffer->payload, rec->u.status.payload_size);
 267         }
 268
 269         debug_event(dbf->hba, level, rec, sizeof(*rec));
 270         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 271 }
 272
 273 /**
 274  * zfcp_dbf_hba_qdio - trace event for QDIO related failure
 275  * @qdio: qdio structure affected by this QDIO related event
 276  * @qdio_error: as passed by qdio module
 277  * @sbal_index: first buffer with error condition, as passed by qdio module
 278  * @sbal_count: number of buffers affected, as passed by qdio module
 279  */
 280 void zfcp_dbf_hba_qdio(struct zfcp_dbf *dbf, unsigned int qdio_error,
 281                        int sbal_index, int sbal_count)
 282 {
 283         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 284         unsigned long flags;
 285
 286         spin_lock_irqsave(&dbf->hba_lock, flags);
 287         memset(r, 0, sizeof(*r));
 288         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 289         r->u.qdio.qdio_error = qdio_error;
 290         r->u.qdio.sbal_index = sbal_index;
 291         r->u.qdio.sbal_count = sbal_count;
 292         debug_event(dbf->hba, 0, r, sizeof(*r));
 293         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 294 }
 295
 296 /**
 297  * zfcp_dbf_hba_berr - trace event for bit error threshold
 298  * @dbf: dbf structure affected by this QDIO related event
 299  * @req: fsf request
 300  */
 301 void zfcp_dbf_hba_berr(struct zfcp_dbf *dbf, struct zfcp_fsf_req *req)
 302 {
 303         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 304         struct fsf_status_read_buffer *sr_buf = req->data;
 305         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 306         unsigned long flags;
 307
 308         spin_lock_irqsave(&dbf->hba_lock, flags);
 309         memset(r, 0, sizeof(*r));
 310         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 311         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
 312         debug_event(dbf->hba, 0, r, sizeof(*r));
 313         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 314 }
 315 static void zfcp_dbf_hba_view_response(char **p,
 316                                        struct zfcp_dbf_hba_record_response *r)
 317 {
 318         struct timespec t;
 319
 320         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 321         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 322         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 323         zfcp_dbf_timestamp(r->fsf_issued, &t);
 324         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 325         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 326         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 327         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 328                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 329         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 330                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 331         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 332         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 333         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 334         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
 335         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 336
 337         switch (r->fsf_command) {
 338         case FSF_QTCB_FCP_CMND:
 339                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 340                         break;
 341                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
 342                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
 343                 p += sprintf(*p, "\n");
 344                 break;
 345
 346         case FSF_QTCB_OPEN_PORT_WITH_DID:
 347         case FSF_QTCB_CLOSE_PORT:
 348         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 349                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
 350                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
 351                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 352                 break;
 353
 354         case FSF_QTCB_OPEN_LUN:
 355         case FSF_QTCB_CLOSE_LUN:
 356                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
 357                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
 358                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
 359                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 360                 break;
 361
 362         case FSF_QTCB_SEND_ELS:
 363                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
 364                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
 365                 break;
 366
 367         case FSF_QTCB_ABORT_FCP_CMND:
 368         case FSF_QTCB_SEND_GENERIC:
 369         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 370         case FSF_QTCB_EXCHANGE_PORT_DATA:
 371         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 372         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 373                 break;
 374         }
 375 }
 376
 377 static void zfcp_dbf_hba_view_status(char **p,
 378                                      struct zfcp_dbf_hba_record_status *r)
 379 {
 380         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 381         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 382         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 383         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 384                       sizeof(struct fsf_queue_designator), 0,
 385                       sizeof(struct fsf_queue_designator));
 386         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 387                       r->payload_size);
 388 }
 389
 390 static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
 391 {
 392         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 393         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 394         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 395 }
 396
 397 static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
 398 {
 399         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 400         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
 401         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
 402         zfcp_dbf_out(p, "prim_seq_err", "%d",
 403                      r->primitive_sequence_error_count);
 404         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
 405                      r->invalid_transmission_word_error_count);
 406         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
 407         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
 408                      r->primitive_sequence_event_timeout_count);
 409         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
 410                      r->elastic_buffer_overrun_error_count);
 411         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
 412                      r->advertised_receive_b2b_credit);
 413         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
 414                      r->current_receive_b2b_credit);
 415         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
 416                      r->advertised_transmit_b2b_credit);
 417         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
 418                      r->current_transmit_b2b_credit);
 419 }
 420
 421 static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
 422                                     char *out_buf, const char *in_buf)
 423 {
 424         struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
 425         char *p = out_buf;
 426
 427         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 428                 return 0;
 429
 430         zfcp_dbf_tag(&p, "tag", r->tag);
 431         if (isalpha(r->tag2[0]))
 432                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 433
 434         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 435                 zfcp_dbf_hba_view_response(&p, &r->u.response);
 436         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 437                 zfcp_dbf_hba_view_status(&p, &r->u.status);
 438         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 439                 zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
 440         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
 441                 zfcp_dbf_hba_view_berr(&p, &r->u.berr);
 442
 443         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 444                 p += sprintf(p, "\n");
 445         return p - out_buf;
 446 }
 447
 448 static struct debug_view zfcp_dbf_hba_view = {
 449         .name = "structured",
 450         .header_proc = zfcp_dbf_view_header,
 451         .format_proc = zfcp_dbf_hba_view_format,
 452 };
 453
 454 static const char *zfcp_dbf_rec_tags[] = {
 455         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 456         [ZFCP_REC_DBF_ID_TARGET] = "target",
 457         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 458         [ZFCP_REC_DBF_ID_ACTION] = "action",
 459 };
 460
 461 static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
 462                                     char *buf, const char *_rec)
 463 {
 464         struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
 465         char *p = buf;
 466         char hint[ZFCP_DBF_ID_SIZE + 1];
 467
 468         memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
 469         hint[ZFCP_DBF_ID_SIZE] = 0;
 470         zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
 471         zfcp_dbf_outs(&p, "hint", hint);
 472         switch (r->id) {
 473         case ZFCP_REC_DBF_ID_THREAD:
 474                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 475                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 476                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 477                 break;
 478         case ZFCP_REC_DBF_ID_TARGET:
 479                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 480                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 481                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 482                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 483                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 484                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 485                 break;
 486         case ZFCP_REC_DBF_ID_TRIGGER:
 487                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 488                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 489                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 490                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 491                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 492                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 493                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 494                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 495                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 496                 break;
 497         case ZFCP_REC_DBF_ID_ACTION:
 498                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 499                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 500                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 501                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 502                 break;
 503         }
 504         p += sprintf(p, "\n");
 505         return p - buf;
 506 }
 507
 508 static struct debug_view zfcp_dbf_rec_view = {
 509         .name = "structured",
 510         .header_proc = zfcp_dbf_view_header,
 511         .format_proc = zfcp_dbf_rec_view_format,
 512 };
 513
 514 /**
 515  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 516  * @id2: identifier for event
 517  * @dbf: reference to dbf structure
 518  * This function assumes that the caller is holding erp_lock.
 519  */
 520 void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
 521 {
 522         struct zfcp_adapter *adapter = dbf->adapter;
 523         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 524         unsigned long flags = 0;
 525         struct list_head *entry;
 526         unsigned ready = 0, running = 0, total;
 527
 528         list_for_each(entry, &adapter->erp_ready_head)
 529                 ready++;
 530         list_for_each(entry, &adapter->erp_running_head)
 531                 running++;
 532         total = adapter->erp_total_count;
 533
 534         spin_lock_irqsave(&dbf->rec_lock, flags);
 535         memset(r, 0, sizeof(*r));
 536         r->id = ZFCP_REC_DBF_ID_THREAD;
 537         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 538         r->u.thread.total = total;
 539         r->u.thread.ready = ready;
 540         r->u.thread.running = running;
 541         debug_event(dbf->rec, 6, r, sizeof(*r));
 542         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 543 }
 544
 545 /**
 546  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 547  * @id2: identifier for event
 548  * @adapter: adapter
 549  * This function assumes that the caller does not hold erp_lock.
 550  */
 551 void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
 552 {
 553         struct zfcp_adapter *adapter = dbf->adapter;
 554         unsigned long flags;
 555
 556         read_lock_irqsave(&adapter->erp_lock, flags);
 557         zfcp_dbf_rec_thread(id2, dbf);
 558         read_unlock_irqrestore(&adapter->erp_lock, flags);
 559 }
 560
 561 static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
 562                                 atomic_t *status, atomic_t *erp_count, u64 wwpn,
 563                                 u32 d_id, u64 fcp_lun)
 564 {
 565         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 566         unsigned long flags;
 567
 568         spin_lock_irqsave(&dbf->rec_lock, flags);
 569         memset(r, 0, sizeof(*r));
 570         r->id = ZFCP_REC_DBF_ID_TARGET;
 571         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 572         r->u.target.ref = (unsigned long)ref;
 573         r->u.target.status = atomic_read(status);
 574         r->u.target.wwpn = wwpn;
 575         r->u.target.d_id = d_id;
 576         r->u.target.fcp_lun = fcp_lun;
 577         r->u.target.erp_count = atomic_read(erp_count);
 578         debug_event(dbf->rec, 3, r, sizeof(*r));
 579         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 580 }
 581
 582 /**
 583  * zfcp_dbf_rec_adapter - trace event for adapter state change
 584  * @id: identifier for trigger of state change
 585  * @ref: additional reference (e.g. request)
 586  * @dbf: reference to dbf structure
 587  */
 588 void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
 589 {
 590         struct zfcp_adapter *adapter = dbf->adapter;
 591
 592         zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
 593                                   &adapter->erp_counter, 0, 0, 0);
 594 }
 595
 596 /**
 597  * zfcp_dbf_rec_port - trace event for port state change
 598  * @id: identifier for trigger of state change
 599  * @ref: additional reference (e.g. request)
 600  * @port: port
 601  */
 602 void zfcp_dbf_rec_port(char *id, void *ref, struct zfcp_port *port)
 603 {
 604         struct zfcp_dbf *dbf = port->adapter->dbf;
 605
 606         zfcp_dbf_rec_target(id, ref, dbf, &port->status,
 607                                   &port->erp_counter, port->wwpn, port->d_id,
 608                                   0);
 609 }
 610
 611 /**
 612  * zfcp_dbf_rec_unit - trace event for unit state change
 613  * @id: identifier for trigger of state change
 614  * @ref: additional reference (e.g. request)
 615  * @unit: unit
 616  */
 617 void zfcp_dbf_rec_unit(char *id, void *ref, struct zfcp_unit *unit)
 618 {
 619         struct zfcp_port *port = unit->port;
 620         struct zfcp_dbf *dbf = port->adapter->dbf;
 621
 622         zfcp_dbf_rec_target(id, ref, dbf, &unit->status,
 623                                   &unit->erp_counter, port->wwpn, port->d_id,
 624                                   unit->fcp_lun);
 625 }
 626
 627 /**
 628  * zfcp_dbf_rec_trigger - trace event for triggered error recovery
 629  * @id2: identifier for error recovery trigger
 630  * @ref: additional reference (e.g. request)
 631  * @want: originally requested error recovery action
 632  * @need: error recovery action actually initiated
 633  * @action: address of error recovery action struct
 634  * @adapter: adapter
 635  * @port: port
 636  * @unit: unit
 637  */
 638 void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
 639                           struct zfcp_adapter *adapter, struct zfcp_port *port,
 640                           struct zfcp_unit *unit)
 641 {
 642         struct zfcp_dbf *dbf = adapter->dbf;
 643         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 644         unsigned long flags;
 645
 646         spin_lock_irqsave(&dbf->rec_lock, flags);
 647         memset(r, 0, sizeof(*r));
 648         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 649         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 650         r->u.trigger.ref = (unsigned long)ref;
 651         r->u.trigger.want = want;
 652         r->u.trigger.need = need;
 653         r->u.trigger.action = (unsigned long)action;
 654         r->u.trigger.as = atomic_read(&adapter->status);
 655         if (port) {
 656                 r->u.trigger.ps = atomic_read(&port->status);
 657                 r->u.trigger.wwpn = port->wwpn;
 658         }
 659         if (unit) {
 660                 r->u.trigger.us = atomic_read(&unit->status);
 661                 r->u.trigger.fcp_lun = unit->fcp_lun;
 662         }
 663         debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
 664         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 665 }
 666
 667 /**
 668  * zfcp_dbf_rec_action - trace event showing progress of recovery action
 669  * @id2: identifier
 670  * @erp_action: error recovery action struct pointer
 671  */
 672 void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
 673 {
 674         struct zfcp_dbf *dbf = erp_action->adapter->dbf;
 675         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 676         unsigned long flags;
 677
 678         spin_lock_irqsave(&dbf->rec_lock, flags);
 679         memset(r, 0, sizeof(*r));
 680         r->id = ZFCP_REC_DBF_ID_ACTION;
 681         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 682         r->u.action.action = (unsigned long)erp_action;
 683         r->u.action.status = erp_action->status;
 684         r->u.action.step = erp_action->step;
 685         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
 686         debug_event(dbf->rec, 5, r, sizeof(*r));
 687         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 688 }
 689
 690 /**
 691  * zfcp_dbf_san_ct_request - trace event for issued CT request
 692  * @fsf_req: request containing issued CT data
 693  */
 694 void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req)
 695 {
 696         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 697         struct zfcp_wka_port *wka_port = ct->wka_port;
 698         struct zfcp_adapter *adapter = wka_port->adapter;
 699         struct zfcp_dbf *dbf = adapter->dbf;
 700         struct ct_hdr *hdr = sg_virt(ct->req);
 701         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 702         struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
 703         int level = 3;
 704         unsigned long flags;
 705
 706         spin_lock_irqsave(&dbf->san_lock, flags);
 707         memset(r, 0, sizeof(*r));
 708         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 709         r->fsf_reqid = fsf_req->req_id;
 710         r->fsf_seqno = fsf_req->seq_no;
 711         r->s_id = fc_host_port_id(adapter->scsi_host);
 712         r->d_id = wka_port->d_id;
 713         oct->cmd_req_code = hdr->cmd_rsp_code;
 714         oct->revision = hdr->revision;
 715         oct->gs_type = hdr->gs_type;
 716         oct->gs_subtype = hdr->gs_subtype;
 717         oct->options = hdr->options;
 718         oct->max_res_size = hdr->max_res_size;
 719         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 720                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 721         debug_event(dbf->san, level, r, sizeof(*r));
 722         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 723                          (void *)hdr + sizeof(struct ct_hdr), oct->len);
 724         spin_unlock_irqrestore(&dbf->san_lock, flags);
 725 }
 726
 727 /**
 728  * zfcp_dbf_san_ct_response - trace event for completion of CT request
 729  * @fsf_req: request containing CT response
 730  */
 731 void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
 732 {
 733         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 734         struct zfcp_wka_port *wka_port = ct->wka_port;
 735         struct zfcp_adapter *adapter = wka_port->adapter;
 736         struct ct_hdr *hdr = sg_virt(ct->resp);
 737         struct zfcp_dbf *dbf = adapter->dbf;
 738         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 739         struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
 740         int level = 3;
 741         unsigned long flags;
 742
 743         spin_lock_irqsave(&dbf->san_lock, flags);
 744         memset(r, 0, sizeof(*r));
 745         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 746         r->fsf_reqid = fsf_req->req_id;
 747         r->fsf_seqno = fsf_req->seq_no;
 748         r->s_id = wka_port->d_id;
 749         r->d_id = fc_host_port_id(adapter->scsi_host);
 750         rct->cmd_rsp_code = hdr->cmd_rsp_code;
 751         rct->revision = hdr->revision;
 752         rct->reason_code = hdr->reason_code;
 753         rct->expl = hdr->reason_code_expl;
 754         rct->vendor_unique = hdr->vendor_unique;
 755         rct->max_res_size = hdr->max_res_size;
 756         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 757                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 758         debug_event(dbf->san, level, r, sizeof(*r));
 759         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 760                          (void *)hdr + sizeof(struct ct_hdr), rct->len);
 761         spin_unlock_irqrestore(&dbf->san_lock, flags);
 762 }
 763
 764 static void zfcp_dbf_san_els(const char *tag, int level,
 765                              struct zfcp_fsf_req *fsf_req, u32 s_id, u32 d_id,
 766                              u8 ls_code, void *buffer, int buflen)
 767 {
 768         struct zfcp_adapter *adapter = fsf_req->adapter;
 769         struct zfcp_dbf *dbf = adapter->dbf;
 770         struct zfcp_dbf_san_record *rec = &dbf->san_buf;
 771         unsigned long flags;
 772
 773         spin_lock_irqsave(&dbf->san_lock, flags);
 774         memset(rec, 0, sizeof(*rec));
 775         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 776         rec->fsf_reqid = fsf_req->req_id;
 777         rec->fsf_seqno = fsf_req->seq_no;
 778         rec->s_id = s_id;
 779         rec->d_id = d_id;
 780         rec->u.els.ls_code = ls_code;
 781         debug_event(dbf->san, level, rec, sizeof(*rec));
 782         zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
 783                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
 784         spin_unlock_irqrestore(&dbf->san_lock, flags);
 785 }
 786
 787 /**
 788  * zfcp_dbf_san_els_request - trace event for issued ELS
 789  * @fsf_req: request containing issued ELS
 790  */
 791 void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
 792 {
 793         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 794
 795         zfcp_dbf_san_els("oels", 2, fsf_req,
 796                                fc_host_port_id(els->adapter->scsi_host),
 797                                els->d_id, *(u8 *) sg_virt(els->req),
 798                                sg_virt(els->req), els->req->length);
 799 }
 800
 801 /**
 802  * zfcp_dbf_san_els_response - trace event for completed ELS
 803  * @fsf_req: request containing ELS response
 804  */
 805 void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
 806 {
 807         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 808
 809         zfcp_dbf_san_els("rels", 2, fsf_req, els->d_id,
 810                                fc_host_port_id(els->adapter->scsi_host),
 811                                *(u8 *)sg_virt(els->req), sg_virt(els->resp),
 812                                els->resp->length);
 813 }
 814
 815 /**
 816  * zfcp_dbf_san_incoming_els - trace event for incomig ELS
 817  * @fsf_req: request containing unsolicited status buffer with incoming ELS
 818  */
 819 void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
 820 {
 821         struct zfcp_adapter *adapter = fsf_req->adapter;
 822         struct fsf_status_read_buffer *buf =
 823                         (struct fsf_status_read_buffer *)fsf_req->data;
 824         int length = (int)buf->length -
 825                      (int)((void *)&buf->payload - (void *)buf);
 826
 827         zfcp_dbf_san_els("iels", 1, fsf_req, buf->d_id,
 828                                fc_host_port_id(adapter->scsi_host),
 829                                buf->payload.data[0], (void *)buf->payload.data,
 830                                length);
 831 }
 832
 833 static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
 834                                     char *out_buf, const char *in_buf)
 835 {
 836         struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
 837         char *p = out_buf;
 838
 839         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 840                 return 0;
 841
 842         zfcp_dbf_tag(&p, "tag", r->tag);
 843         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 844         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 845         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
 846         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
 847
 848         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 849                 struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
 850                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
 851                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 852                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
 853                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
 854                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
 855                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 856         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 857                 struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
 858                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
 859                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 860                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
 861                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
 862                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
 863                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 864         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 865                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 866                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 867                 struct zfcp_dbf_san_record_els *els = &r->u.els;
 868                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
 869         }
 870         return p - out_buf;
 871 }
 872
 873 static struct debug_view zfcp_dbf_san_view = {
 874         .name = "structured",
 875         .header_proc = zfcp_dbf_view_header,
 876         .format_proc = zfcp_dbf_san_view_format,
 877 };
 878
 879 void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
 880                     struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
 881                     struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
 882 {
 883         struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
 884         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 885         unsigned long flags;
 886         struct fcp_rsp_iu *fcp_rsp;
 887         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 888         int offset = 0, buflen = 0;
 889
 890         spin_lock_irqsave(&dbf->scsi_lock, flags);
 891         do {
 892                 memset(rec, 0, sizeof(*rec));
 893                 if (offset == 0) {
 894                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 895                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 896                         if (scsi_cmnd != NULL) {
 897                                 if (scsi_cmnd->device) {
 898                                         rec->scsi_id = scsi_cmnd->device->id;
 899                                         rec->scsi_lun = scsi_cmnd->device->lun;
 900                                 }
 901                                 rec->scsi_result = scsi_cmnd->result;
 902                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 903                                 rec->scsi_serial = scsi_cmnd->serial_number;
 904                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
 905                                         min((int)scsi_cmnd->cmd_len,
 906                                                 ZFCP_DBF_SCSI_OPCODE));
 907                                 rec->scsi_retries = scsi_cmnd->retries;
 908                                 rec->scsi_allowed = scsi_cmnd->allowed;
 909                         }
 910                         if (fsf_req != NULL) {
 911                                 fcp_rsp = (struct fcp_rsp_iu *)
 912                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
 913                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
 914                                 fcp_sns_info =
 915                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 916
 917                                 rec->rsp_validity = fcp_rsp->validity.value;
 918                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
 919                                 rec->rsp_resid = fcp_rsp->fcp_resid;
 920                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
 921                                         rec->rsp_code = *(fcp_rsp_info + 3);
 922                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 923                                         buflen = min((int)fcp_rsp->fcp_sns_len,
 924                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 925                                         rec->sns_info_len = buflen;
 926                                         memcpy(rec->sns_info, fcp_sns_info,
 927                                                min(buflen,
 928                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 929                                         offset += min(buflen,
 930                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 931                                 }
 932
 933                                 rec->fsf_reqid = fsf_req->req_id;
 934                                 rec->fsf_seqno = fsf_req->seq_no;
 935                                 rec->fsf_issued = fsf_req->issued;
 936                         }
 937                         rec->old_fsf_reqid = old_req_id;
 938                 } else {
 939                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 940                         dump->total_size = buflen;
 941                         dump->offset = offset;
 942                         dump->size = min(buflen - offset,
 943                                          (int)sizeof(struct
 944                                                      zfcp_dbf_scsi_record) -
 945                                          (int)sizeof(struct zfcp_dbf_dump));
 946                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 947                         offset += dump->size;
 948                 }
 949                 debug_event(dbf->scsi, level, rec, sizeof(*rec));
 950         } while (offset < buflen);
 951         spin_unlock_irqrestore(&dbf->scsi_lock, flags);
 952 }
 953
 954 static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
 955                                      char *out_buf, const char *in_buf)
 956 {
 957         struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
 958         struct timespec t;
 959         char *p = out_buf;
 960
 961         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 962                 return 0;
 963
 964         zfcp_dbf_tag(&p, "tag", r->tag);
 965         zfcp_dbf_tag(&p, "tag2", r->tag2);
 966         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
 967         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
 968         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
 969         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
 970         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
 971         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
 972                       0, ZFCP_DBF_SCSI_OPCODE);
 973         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
 974         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
 975         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
 976                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
 977         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 978         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 979         zfcp_dbf_timestamp(r->fsf_issued, &t);
 980         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 981
 982         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 983                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
 984                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
 985                              r->rsp_scsi_status);
 986                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
 987                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
 988                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
 989                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
 990                               min((int)r->sns_info_len,
 991                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 992                               r->sns_info_len);
 993         }
 994         p += sprintf(p, "\n");
 995         return p - out_buf;
 996 }
 997
 998 static struct debug_view zfcp_dbf_scsi_view = {
 999         .name = "structured",
1000         .header_proc = zfcp_dbf_view_header,
1001         .format_proc = zfcp_dbf_scsi_view_format,
1002 };
1003
1004 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
1005                                   struct debug_view *view, int size)
1006 {
1007         struct debug_info *d;
1008
1009         d = debug_register(name, dbfsize, level, size);
1010         if (!d)
1011                 return NULL;
1012
1013         debug_register_view(d, &debug_hex_ascii_view);
1014         debug_register_view(d, view);
1015         debug_set_level(d, level);
1016
1017         return d;
1018 }
1019
1020 /**
1021  * zfcp_adapter_debug_register - registers debug feature for an adapter
1022  * @adapter: pointer to adapter for which debug features should be registered
1023  * return: -ENOMEM on error, 0 otherwise
1024  */
1025 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
1026 {
1027         char dbf_name[DEBUG_MAX_NAME_LEN];
1028         struct zfcp_dbf *dbf;
1029
1030         dbf = kmalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
1031         if (!dbf)
1032                 return -ENOMEM;
1033
1034         dbf->adapter = adapter;
1035
1036         spin_lock_init(&dbf->hba_lock);
1037         spin_lock_init(&dbf->san_lock);
1038         spin_lock_init(&dbf->scsi_lock);
1039         spin_lock_init(&dbf->rec_lock);
1040
1041         /* debug feature area which records recovery activity */
1042         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1043         dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
1044                                 sizeof(struct zfcp_dbf_rec_record));
1045         if (!dbf->rec)
1046                 goto err_out;
1047
1048         /* debug feature area which records HBA (FSF and QDIO) conditions */
1049         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1050         dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
1051                                 sizeof(struct zfcp_dbf_hba_record));
1052         if (!dbf->hba)
1053                 goto err_out;
1054
1055         /* debug feature area which records SAN command failures and recovery */
1056         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1057         dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
1058                                 sizeof(struct zfcp_dbf_san_record));
1059         if (!dbf->san)
1060                 goto err_out;
1061
1062         /* debug feature area which records SCSI command failures and recovery */
1063         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1064         dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
1065                                  sizeof(struct zfcp_dbf_scsi_record));
1066         if (!dbf->scsi)
1067                 goto err_out;
1068
1069         adapter->dbf = dbf;
1070         return 0;
1071
1072 err_out:
1073         zfcp_dbf_adapter_unregister(dbf);
1074         return -ENOMEM;
1075 }
1076
1077 /**
1078  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1079  * @dbf: pointer to dbf for which debug features should be unregistered
1080  */
1081 void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
1082 {
1083         debug_unregister(dbf->scsi);
1084         debug_unregister(dbf->san);
1085         debug_unregister(dbf->hba);
1086         debug_unregister(dbf->rec);
1087         dbf->adapter->dbf = NULL;
1088         kfree(dbf);
1089 }
1090