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 #include "zfcp_fc.h"
  17
  18 static u32 dbfsize = 4;
  19
  20 module_param(dbfsize, uint, 0400);
  21 MODULE_PARM_DESC(dbfsize,
  22                  "number of pages for each debug feature area (default 4)");
  23
  24 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  25                              int level, char *from, int from_len)
  26 {
  27         int offset;
  28         struct zfcp_dbf_dump *dump = to;
  29         int room = to_len - sizeof(*dump);
  30
  31         for (offset = 0; offset < from_len; offset += dump->size) {
  32                 memset(to, 0, to_len);
  33                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  34                 dump->total_size = from_len;
  35                 dump->offset = offset;
  36                 dump->size = min(from_len - offset, room);
  37                 memcpy(dump->data, from + offset, dump->size);
  38                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
  39         }
  40 }
  41
  42 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  43 {
  44         int i;
  45
  46         *p += sprintf(*p, "%-24s", label);
  47         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  48                 *p += sprintf(*p, "%c", tag[i]);
  49         *p += sprintf(*p, "\n");
  50 }
  51
  52 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  53 {
  54         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  55 }
  56
  57 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  58 {
  59         va_list arg;
  60
  61         *buf += sprintf(*buf, "%-24s", s);
  62         va_start(arg, format);
  63         *buf += vsprintf(*buf, format, arg);
  64         va_end(arg);
  65         *buf += sprintf(*buf, "\n");
  66 }
  67
  68 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  69                           int buflen, int offset, int total_size)
  70 {
  71         if (!offset)
  72                 *p += sprintf(*p, "%-24s  ", label);
  73         while (buflen--) {
  74                 if (offset > 0) {
  75                         if ((offset % 32) == 0)
  76                                 *p += sprintf(*p, "\n%-24c  ", ' ');
  77                         else if ((offset % 4) == 0)
  78                                 *p += sprintf(*p, " ");
  79                 }
  80                 *p += sprintf(*p, "%02x", *buffer++);
  81                 if (++offset == total_size) {
  82                         *p += sprintf(*p, "\n");
  83                         break;
  84                 }
  85         }
  86         if (!total_size)
  87                 *p += sprintf(*p, "\n");
  88 }
  89
  90 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
  91                                 int area, debug_entry_t *entry, char *out_buf)
  92 {
  93         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
  94         struct timespec t;
  95         char *p = out_buf;
  96
  97         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
  98                 stck_to_timespec(entry->id.stck, &t);
  99                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 100                              t.tv_sec, t.tv_nsec);
 101                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 102         } else  {
 103                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
 104                               dump->total_size);
 105                 if ((dump->offset + dump->size) == dump->total_size)
 106                         p += sprintf(p, "\n");
 107         }
 108         return p - out_buf;
 109 }
 110
 111 void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
 112                                 struct zfcp_fsf_req *fsf_req,
 113                                 struct zfcp_dbf *dbf)
 114 {
 115         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 116         union fsf_prot_status_qual *prot_status_qual =
 117                                         &qtcb->prefix.prot_status_qual;
 118         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 119         struct scsi_cmnd *scsi_cmnd;
 120         struct zfcp_port *port;
 121         struct zfcp_unit *unit;
 122         struct zfcp_send_els *send_els;
 123         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 124         struct zfcp_dbf_hba_record_response *response = &rec->u.response;
 125         unsigned long flags;
 126
 127         spin_lock_irqsave(&dbf->hba_lock, flags);
 128         memset(rec, 0, sizeof(*rec));
 129         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 130         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 131
 132         response->fsf_command = fsf_req->fsf_command;
 133         response->fsf_reqid = fsf_req->req_id;
 134         response->fsf_seqno = fsf_req->seq_no;
 135         response->fsf_issued = fsf_req->issued;
 136         response->fsf_prot_status = qtcb->prefix.prot_status;
 137         response->fsf_status = qtcb->header.fsf_status;
 138         memcpy(response->fsf_prot_status_qual,
 139                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 140         memcpy(response->fsf_status_qual,
 141                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 142         response->fsf_req_status = fsf_req->status;
 143         response->sbal_first = fsf_req->qdio_req.sbal_first;
 144         response->sbal_last = fsf_req->qdio_req.sbal_last;
 145         response->sbal_response = fsf_req->qdio_req.sbal_response;
 146         response->pool = fsf_req->pool != NULL;
 147         response->erp_action = (unsigned long)fsf_req->erp_action;
 148
 149         switch (fsf_req->fsf_command) {
 150         case FSF_QTCB_FCP_CMND:
 151                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 152                         break;
 153                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 154                 if (scsi_cmnd) {
 155                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 156                         response->u.fcp.serial = scsi_cmnd->serial_number;
 157                 }
 158                 break;
 159
 160         case FSF_QTCB_OPEN_PORT_WITH_DID:
 161         case FSF_QTCB_CLOSE_PORT:
 162         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 163                 port = (struct zfcp_port *)fsf_req->data;
 164                 response->u.port.wwpn = port->wwpn;
 165                 response->u.port.d_id = port->d_id;
 166                 response->u.port.port_handle = qtcb->header.port_handle;
 167                 break;
 168
 169         case FSF_QTCB_OPEN_LUN:
 170         case FSF_QTCB_CLOSE_LUN:
 171                 unit = (struct zfcp_unit *)fsf_req->data;
 172                 port = unit->port;
 173                 response->u.unit.wwpn = port->wwpn;
 174                 response->u.unit.fcp_lun = unit->fcp_lun;
 175                 response->u.unit.port_handle = qtcb->header.port_handle;
 176                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 177                 break;
 178
 179         case FSF_QTCB_SEND_ELS:
 180                 send_els = (struct zfcp_send_els *)fsf_req->data;
 181                 response->u.els.d_id = ntoh24(qtcb->bottom.support.d_id);
 182                 break;
 183
 184         case FSF_QTCB_ABORT_FCP_CMND:
 185         case FSF_QTCB_SEND_GENERIC:
 186         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 187         case FSF_QTCB_EXCHANGE_PORT_DATA:
 188         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 189         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 190                 break;
 191         }
 192
 193         debug_event(dbf->hba, level, rec, sizeof(*rec));
 194
 195         /* have fcp channel microcode fixed to use as little as possible */
 196         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 197                 /* adjust length skipping trailing zeros */
 198                 char *buf = (char *)qtcb + qtcb->header.log_start;
 199                 int len = qtcb->header.log_length;
 200                 for (; len && !buf[len - 1]; len--);
 201                 zfcp_dbf_hexdump(dbf->hba, rec, sizeof(*rec), level, buf,
 202                                  len);
 203         }
 204
 205         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 206 }
 207
 208 void _zfcp_dbf_hba_fsf_unsol(const char *tag, int level, struct zfcp_dbf *dbf,
 209                              struct fsf_status_read_buffer *status_buffer)
 210 {
 211         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 212         unsigned long flags;
 213
 214         spin_lock_irqsave(&dbf->hba_lock, flags);
 215         memset(rec, 0, sizeof(*rec));
 216         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 217         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 218
 219         rec->u.status.failed = atomic_read(&dbf->adapter->stat_miss);
 220         if (status_buffer != NULL) {
 221                 rec->u.status.status_type = status_buffer->status_type;
 222                 rec->u.status.status_subtype = status_buffer->status_subtype;
 223                 memcpy(&rec->u.status.queue_designator,
 224                        &status_buffer->queue_designator,
 225                        sizeof(struct fsf_queue_designator));
 226
 227                 switch (status_buffer->status_type) {
 228                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 229                         rec->u.status.payload_size =
 230                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 231                         break;
 232
 233                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 234                         rec->u.status.payload_size =
 235                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 236                         break;
 237
 238                 case FSF_STATUS_READ_LINK_DOWN:
 239                         switch (status_buffer->status_subtype) {
 240                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 241                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 242                                 rec->u.status.payload_size =
 243                                         sizeof(struct fsf_link_down_info);
 244                         }
 245                         break;
 246
 247                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 248                         rec->u.status.payload_size =
 249                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 250                         break;
 251                 }
 252                 memcpy(&rec->u.status.payload,
 253                        &status_buffer->payload, rec->u.status.payload_size);
 254         }
 255
 256         debug_event(dbf->hba, level, rec, sizeof(*rec));
 257         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 258 }
 259
 260 /**
 261  * zfcp_dbf_hba_qdio - trace event for QDIO related failure
 262  * @qdio: qdio structure affected by this QDIO related event
 263  * @qdio_error: as passed by qdio module
 264  * @sbal_index: first buffer with error condition, as passed by qdio module
 265  * @sbal_count: number of buffers affected, as passed by qdio module
 266  */
 267 void zfcp_dbf_hba_qdio(struct zfcp_dbf *dbf, unsigned int qdio_error,
 268                        int sbal_index, int sbal_count)
 269 {
 270         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 271         unsigned long flags;
 272
 273         spin_lock_irqsave(&dbf->hba_lock, flags);
 274         memset(r, 0, sizeof(*r));
 275         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 276         r->u.qdio.qdio_error = qdio_error;
 277         r->u.qdio.sbal_index = sbal_index;
 278         r->u.qdio.sbal_count = sbal_count;
 279         debug_event(dbf->hba, 0, r, sizeof(*r));
 280         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 281 }
 282
 283 /**
 284  * zfcp_dbf_hba_berr - trace event for bit error threshold
 285  * @dbf: dbf structure affected by this QDIO related event
 286  * @req: fsf request
 287  */
 288 void zfcp_dbf_hba_berr(struct zfcp_dbf *dbf, struct zfcp_fsf_req *req)
 289 {
 290         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 291         struct fsf_status_read_buffer *sr_buf = req->data;
 292         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 293         unsigned long flags;
 294
 295         spin_lock_irqsave(&dbf->hba_lock, flags);
 296         memset(r, 0, sizeof(*r));
 297         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 298         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
 299         debug_event(dbf->hba, 0, r, sizeof(*r));
 300         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 301 }
 302 static void zfcp_dbf_hba_view_response(char **p,
 303                                        struct zfcp_dbf_hba_record_response *r)
 304 {
 305         struct timespec t;
 306
 307         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 308         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 309         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 310         stck_to_timespec(r->fsf_issued, &t);
 311         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 312         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 313         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 314         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 315                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 316         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 317                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 318         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 319         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 320         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 321         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
 322         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 323
 324         switch (r->fsf_command) {
 325         case FSF_QTCB_FCP_CMND:
 326                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 327                         break;
 328                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
 329                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
 330                 *p += sprintf(*p, "\n");
 331                 break;
 332
 333         case FSF_QTCB_OPEN_PORT_WITH_DID:
 334         case FSF_QTCB_CLOSE_PORT:
 335         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 336                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
 337                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
 338                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 339                 break;
 340
 341         case FSF_QTCB_OPEN_LUN:
 342         case FSF_QTCB_CLOSE_LUN:
 343                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
 344                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
 345                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
 346                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 347                 break;
 348
 349         case FSF_QTCB_SEND_ELS:
 350                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
 351                 break;
 352
 353         case FSF_QTCB_ABORT_FCP_CMND:
 354         case FSF_QTCB_SEND_GENERIC:
 355         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 356         case FSF_QTCB_EXCHANGE_PORT_DATA:
 357         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 358         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 359                 break;
 360         }
 361 }
 362
 363 static void zfcp_dbf_hba_view_status(char **p,
 364                                      struct zfcp_dbf_hba_record_status *r)
 365 {
 366         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 367         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 368         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 369         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 370                       sizeof(struct fsf_queue_designator), 0,
 371                       sizeof(struct fsf_queue_designator));
 372         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 373                       r->payload_size);
 374 }
 375
 376 static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
 377 {
 378         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 379         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 380         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 381 }
 382
 383 static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
 384 {
 385         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 386         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
 387         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
 388         zfcp_dbf_out(p, "prim_seq_err", "%d",
 389                      r->primitive_sequence_error_count);
 390         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
 391                      r->invalid_transmission_word_error_count);
 392         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
 393         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
 394                      r->primitive_sequence_event_timeout_count);
 395         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
 396                      r->elastic_buffer_overrun_error_count);
 397         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
 398                      r->advertised_receive_b2b_credit);
 399         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
 400                      r->current_receive_b2b_credit);
 401         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
 402                      r->advertised_transmit_b2b_credit);
 403         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
 404                      r->current_transmit_b2b_credit);
 405 }
 406
 407 static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
 408                                     char *out_buf, const char *in_buf)
 409 {
 410         struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
 411         char *p = out_buf;
 412
 413         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 414                 return 0;
 415
 416         zfcp_dbf_tag(&p, "tag", r->tag);
 417         if (isalpha(r->tag2[0]))
 418                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 419
 420         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 421                 zfcp_dbf_hba_view_response(&p, &r->u.response);
 422         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 423                 zfcp_dbf_hba_view_status(&p, &r->u.status);
 424         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 425                 zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
 426         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
 427                 zfcp_dbf_hba_view_berr(&p, &r->u.berr);
 428
 429         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 430                 p += sprintf(p, "\n");
 431         return p - out_buf;
 432 }
 433
 434 static struct debug_view zfcp_dbf_hba_view = {
 435         .name = "structured",
 436         .header_proc = zfcp_dbf_view_header,
 437         .format_proc = zfcp_dbf_hba_view_format,
 438 };
 439
 440 static const char *zfcp_dbf_rec_tags[] = {
 441         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 442         [ZFCP_REC_DBF_ID_TARGET] = "target",
 443         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 444         [ZFCP_REC_DBF_ID_ACTION] = "action",
 445 };
 446
 447 static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
 448                                     char *buf, const char *_rec)
 449 {
 450         struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
 451         char *p = buf;
 452         char hint[ZFCP_DBF_ID_SIZE + 1];
 453
 454         memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
 455         hint[ZFCP_DBF_ID_SIZE] = 0;
 456         zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
 457         zfcp_dbf_outs(&p, "hint", hint);
 458         switch (r->id) {
 459         case ZFCP_REC_DBF_ID_THREAD:
 460                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 461                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 462                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 463                 break;
 464         case ZFCP_REC_DBF_ID_TARGET:
 465                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 466                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 467                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 468                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 469                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 470                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 471                 break;
 472         case ZFCP_REC_DBF_ID_TRIGGER:
 473                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 474                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 475                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 476                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 477                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 478                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 479                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 480                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 481                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 482                 break;
 483         case ZFCP_REC_DBF_ID_ACTION:
 484                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 485                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 486                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 487                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 488                 break;
 489         }
 490         p += sprintf(p, "\n");
 491         return p - buf;
 492 }
 493
 494 static struct debug_view zfcp_dbf_rec_view = {
 495         .name = "structured",
 496         .header_proc = zfcp_dbf_view_header,
 497         .format_proc = zfcp_dbf_rec_view_format,
 498 };
 499
 500 /**
 501  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 502  * @id2: identifier for event
 503  * @dbf: reference to dbf structure
 504  * This function assumes that the caller is holding erp_lock.
 505  */
 506 void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
 507 {
 508         struct zfcp_adapter *adapter = dbf->adapter;
 509         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 510         unsigned long flags = 0;
 511         struct list_head *entry;
 512         unsigned ready = 0, running = 0, total;
 513
 514         list_for_each(entry, &adapter->erp_ready_head)
 515                 ready++;
 516         list_for_each(entry, &adapter->erp_running_head)
 517                 running++;
 518         total = adapter->erp_total_count;
 519
 520         spin_lock_irqsave(&dbf->rec_lock, flags);
 521         memset(r, 0, sizeof(*r));
 522         r->id = ZFCP_REC_DBF_ID_THREAD;
 523         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 524         r->u.thread.total = total;
 525         r->u.thread.ready = ready;
 526         r->u.thread.running = running;
 527         debug_event(dbf->rec, 6, r, sizeof(*r));
 528         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 529 }
 530
 531 /**
 532  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 533  * @id2: identifier for event
 534  * @adapter: adapter
 535  * This function assumes that the caller does not hold erp_lock.
 536  */
 537 void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
 538 {
 539         struct zfcp_adapter *adapter = dbf->adapter;
 540         unsigned long flags;
 541
 542         read_lock_irqsave(&adapter->erp_lock, flags);
 543         zfcp_dbf_rec_thread(id2, dbf);
 544         read_unlock_irqrestore(&adapter->erp_lock, flags);
 545 }
 546
 547 static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
 548                                 atomic_t *status, atomic_t *erp_count, u64 wwpn,
 549                                 u32 d_id, u64 fcp_lun)
 550 {
 551         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 552         unsigned long flags;
 553
 554         spin_lock_irqsave(&dbf->rec_lock, flags);
 555         memset(r, 0, sizeof(*r));
 556         r->id = ZFCP_REC_DBF_ID_TARGET;
 557         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 558         r->u.target.ref = (unsigned long)ref;
 559         r->u.target.status = atomic_read(status);
 560         r->u.target.wwpn = wwpn;
 561         r->u.target.d_id = d_id;
 562         r->u.target.fcp_lun = fcp_lun;
 563         r->u.target.erp_count = atomic_read(erp_count);
 564         debug_event(dbf->rec, 3, r, sizeof(*r));
 565         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 566 }
 567
 568 /**
 569  * zfcp_dbf_rec_adapter - trace event for adapter state change
 570  * @id: identifier for trigger of state change
 571  * @ref: additional reference (e.g. request)
 572  * @dbf: reference to dbf structure
 573  */
 574 void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
 575 {
 576         struct zfcp_adapter *adapter = dbf->adapter;
 577
 578         zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
 579                             &adapter->erp_counter, 0, 0,
 580                             ZFCP_DBF_INVALID_LUN);
 581 }
 582
 583 /**
 584  * zfcp_dbf_rec_port - trace event for port state change
 585  * @id: identifier for trigger of state change
 586  * @ref: additional reference (e.g. request)
 587  * @port: port
 588  */
 589 void zfcp_dbf_rec_port(char *id, void *ref, struct zfcp_port *port)
 590 {
 591         struct zfcp_dbf *dbf = port->adapter->dbf;
 592
 593         zfcp_dbf_rec_target(id, ref, dbf, &port->status,
 594                             &port->erp_counter, port->wwpn, port->d_id,
 595                             ZFCP_DBF_INVALID_LUN);
 596 }
 597
 598 /**
 599  * zfcp_dbf_rec_unit - trace event for unit state change
 600  * @id: identifier for trigger of state change
 601  * @ref: additional reference (e.g. request)
 602  * @unit: unit
 603  */
 604 void zfcp_dbf_rec_unit(char *id, void *ref, struct zfcp_unit *unit)
 605 {
 606         struct zfcp_port *port = unit->port;
 607         struct zfcp_dbf *dbf = port->adapter->dbf;
 608
 609         zfcp_dbf_rec_target(id, ref, dbf, &unit->status,
 610                                   &unit->erp_counter, port->wwpn, port->d_id,
 611                                   unit->fcp_lun);
 612 }
 613
 614 /**
 615  * zfcp_dbf_rec_trigger - trace event for triggered error recovery
 616  * @id2: identifier for error recovery trigger
 617  * @ref: additional reference (e.g. request)
 618  * @want: originally requested error recovery action
 619  * @need: error recovery action actually initiated
 620  * @action: address of error recovery action struct
 621  * @adapter: adapter
 622  * @port: port
 623  * @unit: unit
 624  */
 625 void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
 626                           struct zfcp_adapter *adapter, struct zfcp_port *port,
 627                           struct zfcp_unit *unit)
 628 {
 629         struct zfcp_dbf *dbf = adapter->dbf;
 630         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 631         unsigned long flags;
 632
 633         spin_lock_irqsave(&dbf->rec_lock, flags);
 634         memset(r, 0, sizeof(*r));
 635         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 636         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 637         r->u.trigger.ref = (unsigned long)ref;
 638         r->u.trigger.want = want;
 639         r->u.trigger.need = need;
 640         r->u.trigger.action = (unsigned long)action;
 641         r->u.trigger.as = atomic_read(&adapter->status);
 642         if (port) {
 643                 r->u.trigger.ps = atomic_read(&port->status);
 644                 r->u.trigger.wwpn = port->wwpn;
 645         }
 646         if (unit)
 647                 r->u.trigger.us = atomic_read(&unit->status);
 648         r->u.trigger.fcp_lun = unit ? unit->fcp_lun : ZFCP_DBF_INVALID_LUN;
 649         debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
 650         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 651 }
 652
 653 /**
 654  * zfcp_dbf_rec_action - trace event showing progress of recovery action
 655  * @id2: identifier
 656  * @erp_action: error recovery action struct pointer
 657  */
 658 void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
 659 {
 660         struct zfcp_dbf *dbf = erp_action->adapter->dbf;
 661         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 662         unsigned long flags;
 663
 664         spin_lock_irqsave(&dbf->rec_lock, flags);
 665         memset(r, 0, sizeof(*r));
 666         r->id = ZFCP_REC_DBF_ID_ACTION;
 667         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 668         r->u.action.action = (unsigned long)erp_action;
 669         r->u.action.status = erp_action->status;
 670         r->u.action.step = erp_action->step;
 671         r->u.action.fsf_req = erp_action->fsf_req_id;
 672         debug_event(dbf->rec, 5, r, sizeof(*r));
 673         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 674 }
 675
 676 /**
 677  * zfcp_dbf_san_ct_request - trace event for issued CT request
 678  * @fsf_req: request containing issued CT data
 679  * @d_id: destination id where ct request is sent to
 680  */
 681 void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req, u32 d_id)
 682 {
 683         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
 684         struct zfcp_adapter *adapter = fsf_req->adapter;
 685         struct zfcp_dbf *dbf = adapter->dbf;
 686         struct fc_ct_hdr *hdr = sg_virt(ct->req);
 687         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 688         struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
 689         int level = 3;
 690         unsigned long flags;
 691
 692         spin_lock_irqsave(&dbf->san_lock, flags);
 693         memset(r, 0, sizeof(*r));
 694         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 695         r->fsf_reqid = fsf_req->req_id;
 696         r->fsf_seqno = fsf_req->seq_no;
 697         oct->d_id = d_id;
 698         oct->cmd_req_code = hdr->ct_cmd;
 699         oct->revision = hdr->ct_rev;
 700         oct->gs_type = hdr->ct_fs_type;
 701         oct->gs_subtype = hdr->ct_fs_subtype;
 702         oct->options = hdr->ct_options;
 703         oct->max_res_size = hdr->ct_mr_size;
 704         oct->len = min((int)ct->req->length - (int)sizeof(struct fc_ct_hdr),
 705                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 706         debug_event(dbf->san, level, r, sizeof(*r));
 707         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 708                          (void *)hdr + sizeof(struct fc_ct_hdr), oct->len);
 709         spin_unlock_irqrestore(&dbf->san_lock, flags);
 710 }
 711
 712 /**
 713  * zfcp_dbf_san_ct_response - trace event for completion of CT request
 714  * @fsf_req: request containing CT response
 715  */
 716 void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
 717 {
 718         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
 719         struct zfcp_adapter *adapter = fsf_req->adapter;
 720         struct fc_ct_hdr *hdr = sg_virt(ct->resp);
 721         struct zfcp_dbf *dbf = adapter->dbf;
 722         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 723         struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
 724         int level = 3;
 725         unsigned long flags;
 726
 727         spin_lock_irqsave(&dbf->san_lock, flags);
 728         memset(r, 0, sizeof(*r));
 729         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 730         r->fsf_reqid = fsf_req->req_id;
 731         r->fsf_seqno = fsf_req->seq_no;
 732         rct->cmd_rsp_code = hdr->ct_cmd;
 733         rct->revision = hdr->ct_rev;
 734         rct->reason_code = hdr->ct_reason;
 735         rct->expl = hdr->ct_explan;
 736         rct->vendor_unique = hdr->ct_vendor;
 737         rct->max_res_size = hdr->ct_mr_size;
 738         rct->len = min((int)ct->resp->length - (int)sizeof(struct fc_ct_hdr),
 739                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 740         debug_event(dbf->san, level, r, sizeof(*r));
 741         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 742                          (void *)hdr + sizeof(struct fc_ct_hdr), rct->len);
 743         spin_unlock_irqrestore(&dbf->san_lock, flags);
 744 }
 745
 746 static void zfcp_dbf_san_els(const char *tag, int level,
 747                              struct zfcp_fsf_req *fsf_req, u32 d_id,
 748                              void *buffer, int buflen)
 749 {
 750         struct zfcp_adapter *adapter = fsf_req->adapter;
 751         struct zfcp_dbf *dbf = adapter->dbf;
 752         struct zfcp_dbf_san_record *rec = &dbf->san_buf;
 753         unsigned long flags;
 754
 755         spin_lock_irqsave(&dbf->san_lock, flags);
 756         memset(rec, 0, sizeof(*rec));
 757         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 758         rec->fsf_reqid = fsf_req->req_id;
 759         rec->fsf_seqno = fsf_req->seq_no;
 760         rec->u.els.d_id = d_id;
 761         debug_event(dbf->san, level, rec, sizeof(*rec));
 762         zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
 763                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
 764         spin_unlock_irqrestore(&dbf->san_lock, flags);
 765 }
 766
 767 /**
 768  * zfcp_dbf_san_els_request - trace event for issued ELS
 769  * @fsf_req: request containing issued ELS
 770  */
 771 void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
 772 {
 773         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
 774         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
 775
 776         zfcp_dbf_san_els("oels", 2, fsf_req, d_id,
 777                          sg_virt(els->req), els->req->length);
 778 }
 779
 780 /**
 781  * zfcp_dbf_san_els_response - trace event for completed ELS
 782  * @fsf_req: request containing ELS response
 783  */
 784 void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
 785 {
 786         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
 787         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
 788
 789         zfcp_dbf_san_els("rels", 2, fsf_req, d_id,
 790                                sg_virt(els->resp), els->resp->length);
 791 }
 792
 793 /**
 794  * zfcp_dbf_san_incoming_els - trace event for incomig ELS
 795  * @fsf_req: request containing unsolicited status buffer with incoming ELS
 796  */
 797 void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
 798 {
 799         struct fsf_status_read_buffer *buf =
 800                         (struct fsf_status_read_buffer *)fsf_req->data;
 801         int length = (int)buf->length -
 802                      (int)((void *)&buf->payload - (void *)buf);
 803
 804         zfcp_dbf_san_els("iels", 1, fsf_req, ntoh24(buf->d_id),
 805                                (void *)buf->payload.data, length);
 806 }
 807
 808 static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
 809                                     char *out_buf, const char *in_buf)
 810 {
 811         struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
 812         char *p = out_buf;
 813
 814         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 815                 return 0;
 816
 817         zfcp_dbf_tag(&p, "tag", r->tag);
 818         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 819         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 820
 821         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 822                 struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
 823                 zfcp_dbf_out(&p, "d_id", "0x%06x", ct->d_id);
 824                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
 825                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 826                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
 827                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
 828                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
 829                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 830         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 831                 struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
 832                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
 833                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 834                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
 835                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
 836                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
 837                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 838         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 839                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 840                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 841                 struct zfcp_dbf_san_record_els *els = &r->u.els;
 842                 zfcp_dbf_out(&p, "d_id", "0x%06x", els->d_id);
 843         }
 844         return p - out_buf;
 845 }
 846
 847 static struct debug_view zfcp_dbf_san_view = {
 848         .name = "structured",
 849         .header_proc = zfcp_dbf_view_header,
 850         .format_proc = zfcp_dbf_san_view_format,
 851 };
 852
 853 void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
 854                     struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
 855                     struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
 856 {
 857         struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
 858         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 859         unsigned long flags;
 860         struct fcp_resp_with_ext *fcp_rsp;
 861         struct fcp_resp_rsp_info *fcp_rsp_info = NULL;
 862         char *fcp_sns_info = NULL;
 863         int offset = 0, buflen = 0;
 864
 865         spin_lock_irqsave(&dbf->scsi_lock, flags);
 866         do {
 867                 memset(rec, 0, sizeof(*rec));
 868                 if (offset == 0) {
 869                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 870                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 871                         if (scsi_cmnd != NULL) {
 872                                 if (scsi_cmnd->device) {
 873                                         rec->scsi_id = scsi_cmnd->device->id;
 874                                         rec->scsi_lun = scsi_cmnd->device->lun;
 875                                 }
 876                                 rec->scsi_result = scsi_cmnd->result;
 877                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 878                                 rec->scsi_serial = scsi_cmnd->serial_number;
 879                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
 880                                         min((int)scsi_cmnd->cmd_len,
 881                                                 ZFCP_DBF_SCSI_OPCODE));
 882                                 rec->scsi_retries = scsi_cmnd->retries;
 883                                 rec->scsi_allowed = scsi_cmnd->allowed;
 884                         }
 885                         if (fsf_req != NULL) {
 886                                 fcp_rsp = (struct fcp_resp_with_ext *)
 887                                         &(fsf_req->qtcb->bottom.io.fcp_rsp);
 888                                 fcp_rsp_info = (struct fcp_resp_rsp_info *)
 889                                         &fcp_rsp[1];
 890                                 fcp_sns_info = (char *) &fcp_rsp[1];
 891                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
 892                                         fcp_sns_info += fcp_rsp->ext.fr_sns_len;
 893
 894                                 rec->rsp_validity = fcp_rsp->resp.fr_flags;
 895                                 rec->rsp_scsi_status = fcp_rsp->resp.fr_status;
 896                                 rec->rsp_resid = fcp_rsp->ext.fr_resid;
 897                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
 898                                         rec->rsp_code = fcp_rsp_info->rsp_code;
 899                                 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
 900                                         buflen = min(fcp_rsp->ext.fr_sns_len,
 901                                            (u32)ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 902                                         rec->sns_info_len = buflen;
 903                                         memcpy(rec->sns_info, fcp_sns_info,
 904                                                min(buflen,
 905                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 906                                         offset += min(buflen,
 907                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 908                                 }
 909
 910                                 rec->fsf_reqid = fsf_req->req_id;
 911                                 rec->fsf_seqno = fsf_req->seq_no;
 912                                 rec->fsf_issued = fsf_req->issued;
 913                         }
 914                         rec->old_fsf_reqid = old_req_id;
 915                 } else {
 916                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 917                         dump->total_size = buflen;
 918                         dump->offset = offset;
 919                         dump->size = min(buflen - offset,
 920                                          (int)sizeof(struct
 921                                                      zfcp_dbf_scsi_record) -
 922                                          (int)sizeof(struct zfcp_dbf_dump));
 923                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 924                         offset += dump->size;
 925                 }
 926                 debug_event(dbf->scsi, level, rec, sizeof(*rec));
 927         } while (offset < buflen);
 928         spin_unlock_irqrestore(&dbf->scsi_lock, flags);
 929 }
 930
 931 static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
 932                                      char *out_buf, const char *in_buf)
 933 {
 934         struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
 935         struct timespec t;
 936         char *p = out_buf;
 937
 938         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 939                 return 0;
 940
 941         zfcp_dbf_tag(&p, "tag", r->tag);
 942         zfcp_dbf_tag(&p, "tag2", r->tag2);
 943         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
 944         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
 945         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
 946         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
 947         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
 948         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
 949                       0, ZFCP_DBF_SCSI_OPCODE);
 950         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
 951         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
 952         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
 953                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
 954         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 955         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 956         stck_to_timespec(r->fsf_issued, &t);
 957         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 958
 959         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 960                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
 961                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
 962                              r->rsp_scsi_status);
 963                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
 964                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
 965                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
 966                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
 967                               min((int)r->sns_info_len,
 968                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 969                               r->sns_info_len);
 970         }
 971         p += sprintf(p, "\n");
 972         return p - out_buf;
 973 }
 974
 975 static struct debug_view zfcp_dbf_scsi_view = {
 976         .name = "structured",
 977         .header_proc = zfcp_dbf_view_header,
 978         .format_proc = zfcp_dbf_scsi_view_format,
 979 };
 980
 981 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
 982                                   struct debug_view *view, int size)
 983 {
 984         struct debug_info *d;
 985
 986         d = debug_register(name, dbfsize, level, size);
 987         if (!d)
 988                 return NULL;
 989
 990         debug_register_view(d, &debug_hex_ascii_view);
 991         debug_register_view(d, view);
 992         debug_set_level(d, level);
 993
 994         return d;
 995 }
 996
 997 /**
 998  * zfcp_adapter_debug_register - registers debug feature for an adapter
 999  * @adapter: pointer to adapter for which debug features should be registered
1000  * return: -ENOMEM on error, 0 otherwise
1001  */
1002 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
1003 {
1004         char dbf_name[DEBUG_MAX_NAME_LEN];
1005         struct zfcp_dbf *dbf;
1006
1007         dbf = kmalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
1008         if (!dbf)
1009                 return -ENOMEM;
1010
1011         dbf->adapter = adapter;
1012
1013         spin_lock_init(&dbf->hba_lock);
1014         spin_lock_init(&dbf->san_lock);
1015         spin_lock_init(&dbf->scsi_lock);
1016         spin_lock_init(&dbf->rec_lock);
1017
1018         /* debug feature area which records recovery activity */
1019         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1020         dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
1021                                 sizeof(struct zfcp_dbf_rec_record));
1022         if (!dbf->rec)
1023                 goto err_out;
1024
1025         /* debug feature area which records HBA (FSF and QDIO) conditions */
1026         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1027         dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
1028                                 sizeof(struct zfcp_dbf_hba_record));
1029         if (!dbf->hba)
1030                 goto err_out;
1031
1032         /* debug feature area which records SAN command failures and recovery */
1033         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1034         dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
1035                                 sizeof(struct zfcp_dbf_san_record));
1036         if (!dbf->san)
1037                 goto err_out;
1038
1039         /* debug feature area which records SCSI command failures and recovery */
1040         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1041         dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
1042                                  sizeof(struct zfcp_dbf_scsi_record));
1043         if (!dbf->scsi)
1044                 goto err_out;
1045
1046         adapter->dbf = dbf;
1047         return 0;
1048
1049 err_out:
1050         zfcp_dbf_adapter_unregister(dbf);
1051         return -ENOMEM;
1052 }
1053
1054 /**
1055  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1056  * @dbf: pointer to dbf for which debug features should be unregistered
1057  */
1058 void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
1059 {
1060         if (!dbf)
1061                 return;
1062         debug_unregister(dbf->scsi);
1063         debug_unregister(dbf->san);
1064         debug_unregister(dbf->hba);
1065         debug_unregister(dbf->rec);
1066         dbf->adapter->dbf = NULL;
1067         kfree(dbf);
1068 }
1069