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 <linux/slab.h>
  14 #include <asm/debug.h>
  15 #include "zfcp_dbf.h"
  16 #include "zfcp_ext.h"
  17 #include "zfcp_fc.h"
  18
  19 static u32 dbfsize = 4;
  20
  21 module_param(dbfsize, uint, 0400);
  22 MODULE_PARM_DESC(dbfsize,
  23                  "number of pages for each debug feature area (default 4)");
  24
  25 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  26                              int level, char *from, int from_len)
  27 {
  28         int offset;
  29         struct zfcp_dbf_dump *dump = to;
  30         int room = to_len - sizeof(*dump);
  31
  32         for (offset = 0; offset < from_len; offset += dump->size) {
  33                 memset(to, 0, to_len);
  34                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  35                 dump->total_size = from_len;
  36                 dump->offset = offset;
  37                 dump->size = min(from_len - offset, room);
  38                 memcpy(dump->data, from + offset, dump->size);
  39                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
  40         }
  41 }
  42
  43 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  44 {
  45         int i;
  46
  47         *p += sprintf(*p, "%-24s", label);
  48         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  49                 *p += sprintf(*p, "%c", tag[i]);
  50         *p += sprintf(*p, "\n");
  51 }
  52
  53 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  54 {
  55         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  56 }
  57
  58 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  59 {
  60         va_list arg;
  61
  62         *buf += sprintf(*buf, "%-24s", s);
  63         va_start(arg, format);
  64         *buf += vsprintf(*buf, format, arg);
  65         va_end(arg);
  66         *buf += sprintf(*buf, "\n");
  67 }
  68
  69 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  70                           int buflen, int offset, int total_size)
  71 {
  72         if (!offset)
  73                 *p += sprintf(*p, "%-24s  ", label);
  74         while (buflen--) {
  75                 if (offset > 0) {
  76                         if ((offset % 32) == 0)
  77                                 *p += sprintf(*p, "\n%-24c  ", ' ');
  78                         else if ((offset % 4) == 0)
  79                                 *p += sprintf(*p, " ");
  80                 }
  81                 *p += sprintf(*p, "%02x", *buffer++);
  82                 if (++offset == total_size) {
  83                         *p += sprintf(*p, "\n");
  84                         break;
  85                 }
  86         }
  87         if (!total_size)
  88                 *p += sprintf(*p, "\n");
  89 }
  90
  91 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
  92                                 int area, debug_entry_t *entry, char *out_buf)
  93 {
  94         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
  95         struct timespec t;
  96         char *p = out_buf;
  97
  98         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
  99                 stck_to_timespec(entry->id.stck, &t);
 100                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 101                              t.tv_sec, t.tv_nsec);
 102                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 103         } else  {
 104                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
 105                               dump->total_size);
 106                 if ((dump->offset + dump->size) == dump->total_size)
 107                         p += sprintf(p, "\n");
 108         }
 109         return p - out_buf;
 110 }
 111
 112 void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
 113                                 struct zfcp_fsf_req *fsf_req,
 114                                 struct zfcp_dbf *dbf)
 115 {
 116         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 117         union fsf_prot_status_qual *prot_status_qual =
 118                                         &qtcb->prefix.prot_status_qual;
 119         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 120         struct scsi_cmnd *scsi_cmnd;
 121         struct zfcp_port *port;
 122         struct zfcp_unit *unit;
 123         struct zfcp_send_els *send_els;
 124         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 125         struct zfcp_dbf_hba_record_response *response = &rec->u.response;
 126         unsigned long flags;
 127
 128         spin_lock_irqsave(&dbf->hba_lock, flags);
 129         memset(rec, 0, sizeof(*rec));
 130         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 131         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 132
 133         response->fsf_command = fsf_req->fsf_command;
 134         response->fsf_reqid = fsf_req->req_id;
 135         response->fsf_seqno = fsf_req->seq_no;
 136         response->fsf_issued = fsf_req->issued;
 137         response->fsf_prot_status = qtcb->prefix.prot_status;
 138         response->fsf_status = qtcb->header.fsf_status;
 139         memcpy(response->fsf_prot_status_qual,
 140                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 141         memcpy(response->fsf_status_qual,
 142                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 143         response->fsf_req_status = fsf_req->status;
 144         response->sbal_first = fsf_req->qdio_req.sbal_first;
 145         response->sbal_last = fsf_req->qdio_req.sbal_last;
 146         response->sbal_response = fsf_req->qdio_req.sbal_response;
 147         response->pool = fsf_req->pool != NULL;
 148         response->erp_action = (unsigned long)fsf_req->erp_action;
 149
 150         switch (fsf_req->fsf_command) {
 151         case FSF_QTCB_FCP_CMND:
 152                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 153                         break;
 154                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 155                 if (scsi_cmnd) {
 156                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 157                         response->u.fcp.data_dir =
 158                                 qtcb->bottom.io.data_direction;
 159                 }
 160                 break;
 161
 162         case FSF_QTCB_OPEN_PORT_WITH_DID:
 163         case FSF_QTCB_CLOSE_PORT:
 164         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 165                 port = (struct zfcp_port *)fsf_req->data;
 166                 response->u.port.wwpn = port->wwpn;
 167                 response->u.port.d_id = port->d_id;
 168                 response->u.port.port_handle = qtcb->header.port_handle;
 169                 break;
 170
 171         case FSF_QTCB_OPEN_LUN:
 172         case FSF_QTCB_CLOSE_LUN:
 173                 unit = (struct zfcp_unit *)fsf_req->data;
 174                 port = unit->port;
 175                 response->u.unit.wwpn = port->wwpn;
 176                 response->u.unit.fcp_lun = unit->fcp_lun;
 177                 response->u.unit.port_handle = qtcb->header.port_handle;
 178                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 179                 break;
 180
 181         case FSF_QTCB_SEND_ELS:
 182                 send_els = (struct zfcp_send_els *)fsf_req->data;
 183                 response->u.els.d_id = ntoh24(qtcb->bottom.support.d_id);
 184                 break;
 185
 186         case FSF_QTCB_ABORT_FCP_CMND:
 187         case FSF_QTCB_SEND_GENERIC:
 188         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 189         case FSF_QTCB_EXCHANGE_PORT_DATA:
 190         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 191         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 192                 break;
 193         }
 194
 195         debug_event(dbf->hba, level, rec, sizeof(*rec));
 196
 197         /* have fcp channel microcode fixed to use as little as possible */
 198         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 199                 /* adjust length skipping trailing zeros */
 200                 char *buf = (char *)qtcb + qtcb->header.log_start;
 201                 int len = qtcb->header.log_length;
 202                 for (; len && !buf[len - 1]; len--);
 203                 zfcp_dbf_hexdump(dbf->hba, rec, sizeof(*rec), level, buf,
 204                                  len);
 205         }
 206
 207         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 208 }
 209
 210 void _zfcp_dbf_hba_fsf_unsol(const char *tag, int level, struct zfcp_dbf *dbf,
 211                              struct fsf_status_read_buffer *status_buffer)
 212 {
 213         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 214         unsigned long flags;
 215
 216         spin_lock_irqsave(&dbf->hba_lock, flags);
 217         memset(rec, 0, sizeof(*rec));
 218         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 219         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 220
 221         rec->u.status.failed = atomic_read(&dbf->adapter->stat_miss);
 222         if (status_buffer != NULL) {
 223                 rec->u.status.status_type = status_buffer->status_type;
 224                 rec->u.status.status_subtype = status_buffer->status_subtype;
 225                 memcpy(&rec->u.status.queue_designator,
 226                        &status_buffer->queue_designator,
 227                        sizeof(struct fsf_queue_designator));
 228
 229                 switch (status_buffer->status_type) {
 230                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 231                         rec->u.status.payload_size =
 232                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 233                         break;
 234
 235                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 236                         rec->u.status.payload_size =
 237                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 238                         break;
 239
 240                 case FSF_STATUS_READ_LINK_DOWN:
 241                         switch (status_buffer->status_subtype) {
 242                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 243                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 244                                 rec->u.status.payload_size =
 245                                         sizeof(struct fsf_link_down_info);
 246                         }
 247                         break;
 248
 249                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 250                         rec->u.status.payload_size =
 251                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 252                         break;
 253                 }
 254                 memcpy(&rec->u.status.payload,
 255                        &status_buffer->payload, rec->u.status.payload_size);
 256         }
 257
 258         debug_event(dbf->hba, level, rec, sizeof(*rec));
 259         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 260 }
 261
 262 /**
 263  * zfcp_dbf_hba_qdio - trace event for QDIO related failure
 264  * @qdio: qdio structure affected by this QDIO related event
 265  * @qdio_error: as passed by qdio module
 266  * @sbal_index: first buffer with error condition, as passed by qdio module
 267  * @sbal_count: number of buffers affected, as passed by qdio module
 268  */
 269 void zfcp_dbf_hba_qdio(struct zfcp_dbf *dbf, unsigned int qdio_error,
 270                        int sbal_index, int sbal_count)
 271 {
 272         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 273         unsigned long flags;
 274
 275         spin_lock_irqsave(&dbf->hba_lock, flags);
 276         memset(r, 0, sizeof(*r));
 277         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 278         r->u.qdio.qdio_error = qdio_error;
 279         r->u.qdio.sbal_index = sbal_index;
 280         r->u.qdio.sbal_count = sbal_count;
 281         debug_event(dbf->hba, 0, r, sizeof(*r));
 282         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 283 }
 284
 285 /**
 286  * zfcp_dbf_hba_berr - trace event for bit error threshold
 287  * @dbf: dbf structure affected by this QDIO related event
 288  * @req: fsf request
 289  */
 290 void zfcp_dbf_hba_berr(struct zfcp_dbf *dbf, struct zfcp_fsf_req *req)
 291 {
 292         struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 293         struct fsf_status_read_buffer *sr_buf = req->data;
 294         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 295         unsigned long flags;
 296
 297         spin_lock_irqsave(&dbf->hba_lock, flags);
 298         memset(r, 0, sizeof(*r));
 299         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 300         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
 301         debug_event(dbf->hba, 0, r, sizeof(*r));
 302         spin_unlock_irqrestore(&dbf->hba_lock, flags);
 303 }
 304 static void zfcp_dbf_hba_view_response(char **p,
 305                                        struct zfcp_dbf_hba_record_response *r)
 306 {
 307         struct timespec t;
 308
 309         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 310         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 311         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 312         stck_to_timespec(r->fsf_issued, &t);
 313         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 314         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 315         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 316         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 317                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 318         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 319                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 320         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 321         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 322         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 323         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
 324         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 325
 326         switch (r->fsf_command) {
 327         case FSF_QTCB_FCP_CMND:
 328                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 329                         break;
 330                 zfcp_dbf_out(p, "data_direction", "0x%04x", r->u.fcp.data_dir);
 331                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
 332                 *p += sprintf(*p, "\n");
 333                 break;
 334
 335         case FSF_QTCB_OPEN_PORT_WITH_DID:
 336         case FSF_QTCB_CLOSE_PORT:
 337         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 338                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
 339                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
 340                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 341                 break;
 342
 343         case FSF_QTCB_OPEN_LUN:
 344         case FSF_QTCB_CLOSE_LUN:
 345                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
 346                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
 347                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
 348                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 349                 break;
 350
 351         case FSF_QTCB_SEND_ELS:
 352                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
 353                 break;
 354
 355         case FSF_QTCB_ABORT_FCP_CMND:
 356         case FSF_QTCB_SEND_GENERIC:
 357         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 358         case FSF_QTCB_EXCHANGE_PORT_DATA:
 359         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 360         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 361                 break;
 362         }
 363 }
 364
 365 static void zfcp_dbf_hba_view_status(char **p,
 366                                      struct zfcp_dbf_hba_record_status *r)
 367 {
 368         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 369         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 370         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 371         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 372                       sizeof(struct fsf_queue_designator), 0,
 373                       sizeof(struct fsf_queue_designator));
 374         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 375                       r->payload_size);
 376 }
 377
 378 static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
 379 {
 380         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 381         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 382         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 383 }
 384
 385 static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
 386 {
 387         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 388         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
 389         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
 390         zfcp_dbf_out(p, "prim_seq_err", "%d",
 391                      r->primitive_sequence_error_count);
 392         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
 393                      r->invalid_transmission_word_error_count);
 394         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
 395         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
 396                      r->primitive_sequence_event_timeout_count);
 397         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
 398                      r->elastic_buffer_overrun_error_count);
 399         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
 400                      r->advertised_receive_b2b_credit);
 401         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
 402                      r->current_receive_b2b_credit);
 403         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
 404                      r->advertised_transmit_b2b_credit);
 405         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
 406                      r->current_transmit_b2b_credit);
 407 }
 408
 409 static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
 410                                     char *out_buf, const char *in_buf)
 411 {
 412         struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
 413         char *p = out_buf;
 414
 415         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 416                 return 0;
 417
 418         zfcp_dbf_tag(&p, "tag", r->tag);
 419         if (isalpha(r->tag2[0]))
 420                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 421
 422         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 423                 zfcp_dbf_hba_view_response(&p, &r->u.response);
 424         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 425                 zfcp_dbf_hba_view_status(&p, &r->u.status);
 426         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 427                 zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
 428         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
 429                 zfcp_dbf_hba_view_berr(&p, &r->u.berr);
 430
 431         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 432                 p += sprintf(p, "\n");
 433         return p - out_buf;
 434 }
 435
 436 static struct debug_view zfcp_dbf_hba_view = {
 437         .name = "structured",
 438         .header_proc = zfcp_dbf_view_header,
 439         .format_proc = zfcp_dbf_hba_view_format,
 440 };
 441
 442 static const char *zfcp_dbf_rec_tags[] = {
 443         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 444         [ZFCP_REC_DBF_ID_TARGET] = "target",
 445         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 446         [ZFCP_REC_DBF_ID_ACTION] = "action",
 447 };
 448
 449 static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
 450                                     char *buf, const char *_rec)
 451 {
 452         struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
 453         char *p = buf;
 454         char hint[ZFCP_DBF_ID_SIZE + 1];
 455
 456         memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
 457         hint[ZFCP_DBF_ID_SIZE] = 0;
 458         zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
 459         zfcp_dbf_outs(&p, "hint", hint);
 460         switch (r->id) {
 461         case ZFCP_REC_DBF_ID_THREAD:
 462                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 463                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 464                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 465                 break;
 466         case ZFCP_REC_DBF_ID_TARGET:
 467                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 468                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 469                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 470                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 471                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 472                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 473                 break;
 474         case ZFCP_REC_DBF_ID_TRIGGER:
 475                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 476                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 477                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 478                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 479                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 480                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 481                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 482                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 483                 zfcp_dbf_out(&p, "lun_status", "0x%08x", r->u.trigger.ls);
 484                 break;
 485         case ZFCP_REC_DBF_ID_ACTION:
 486                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 487                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 488                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 489                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 490                 break;
 491         }
 492         p += sprintf(p, "\n");
 493         return p - buf;
 494 }
 495
 496 static struct debug_view zfcp_dbf_rec_view = {
 497         .name = "structured",
 498         .header_proc = zfcp_dbf_view_header,
 499         .format_proc = zfcp_dbf_rec_view_format,
 500 };
 501
 502 /**
 503  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 504  * @id2: identifier for event
 505  * @dbf: reference to dbf structure
 506  * This function assumes that the caller is holding erp_lock.
 507  */
 508 void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
 509 {
 510         struct zfcp_adapter *adapter = dbf->adapter;
 511         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 512         unsigned long flags = 0;
 513         struct list_head *entry;
 514         unsigned ready = 0, running = 0, total;
 515
 516         list_for_each(entry, &adapter->erp_ready_head)
 517                 ready++;
 518         list_for_each(entry, &adapter->erp_running_head)
 519                 running++;
 520         total = adapter->erp_total_count;
 521
 522         spin_lock_irqsave(&dbf->rec_lock, flags);
 523         memset(r, 0, sizeof(*r));
 524         r->id = ZFCP_REC_DBF_ID_THREAD;
 525         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 526         r->u.thread.total = total;
 527         r->u.thread.ready = ready;
 528         r->u.thread.running = running;
 529         debug_event(dbf->rec, 6, r, sizeof(*r));
 530         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 531 }
 532
 533 /**
 534  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 535  * @id2: identifier for event
 536  * @adapter: adapter
 537  * This function assumes that the caller does not hold erp_lock.
 538  */
 539 void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
 540 {
 541         struct zfcp_adapter *adapter = dbf->adapter;
 542         unsigned long flags;
 543
 544         read_lock_irqsave(&adapter->erp_lock, flags);
 545         zfcp_dbf_rec_thread(id2, dbf);
 546         read_unlock_irqrestore(&adapter->erp_lock, flags);
 547 }
 548
 549 static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
 550                                 atomic_t *status, atomic_t *erp_count, u64 wwpn,
 551                                 u32 d_id, u64 fcp_lun)
 552 {
 553         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 554         unsigned long flags;
 555
 556         spin_lock_irqsave(&dbf->rec_lock, flags);
 557         memset(r, 0, sizeof(*r));
 558         r->id = ZFCP_REC_DBF_ID_TARGET;
 559         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 560         r->u.target.ref = (unsigned long)ref;
 561         r->u.target.status = atomic_read(status);
 562         r->u.target.wwpn = wwpn;
 563         r->u.target.d_id = d_id;
 564         r->u.target.fcp_lun = fcp_lun;
 565         r->u.target.erp_count = atomic_read(erp_count);
 566         debug_event(dbf->rec, 3, r, sizeof(*r));
 567         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 568 }
 569
 570 /**
 571  * zfcp_dbf_rec_adapter - trace event for adapter state change
 572  * @id: identifier for trigger of state change
 573  * @ref: additional reference (e.g. request)
 574  * @dbf: reference to dbf structure
 575  */
 576 void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
 577 {
 578         struct zfcp_adapter *adapter = dbf->adapter;
 579
 580         zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
 581                             &adapter->erp_counter, 0, 0,
 582                             ZFCP_DBF_INVALID_LUN);
 583 }
 584
 585 /**
 586  * zfcp_dbf_rec_port - trace event for port state change
 587  * @id: identifier for trigger of state change
 588  * @ref: additional reference (e.g. request)
 589  * @port: port
 590  */
 591 void zfcp_dbf_rec_port(char *id, void *ref, struct zfcp_port *port)
 592 {
 593         struct zfcp_dbf *dbf = port->adapter->dbf;
 594
 595         zfcp_dbf_rec_target(id, ref, dbf, &port->status,
 596                             &port->erp_counter, port->wwpn, port->d_id,
 597                             ZFCP_DBF_INVALID_LUN);
 598 }
 599
 600 /**
 601  * zfcp_dbf_rec_lun - trace event for LUN state change
 602  * @id: identifier for trigger of state change
 603  * @ref: additional reference (e.g. request)
 604  * @sdev: SCSI device
 605  */
 606 void zfcp_dbf_rec_lun(char *id, void *ref, struct scsi_device *sdev)
 607 {
 608         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 609         struct zfcp_port *port = zfcp_sdev->port;
 610         struct zfcp_dbf *dbf = port->adapter->dbf;
 611
 612         zfcp_dbf_rec_target(id, ref, dbf, &zfcp_sdev->status,
 613                             &zfcp_sdev->erp_counter, port->wwpn, port->d_id,
 614                             zfcp_scsi_dev_lun(sdev));
 615 }
 616
 617 /**
 618  * zfcp_dbf_rec_trigger - trace event for triggered error recovery
 619  * @id2: identifier for error recovery trigger
 620  * @ref: additional reference (e.g. request)
 621  * @want: originally requested error recovery action
 622  * @need: error recovery action actually initiated
 623  * @action: address of error recovery action struct
 624  * @adapter: adapter
 625  * @port: port
 626  * @sdev: SCSI device
 627  */
 628 void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
 629                           struct zfcp_adapter *adapter, struct zfcp_port *port,
 630                           struct scsi_device *sdev)
 631 {
 632         struct zfcp_dbf *dbf = adapter->dbf;
 633         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 634         unsigned long flags;
 635
 636         spin_lock_irqsave(&dbf->rec_lock, flags);
 637         memset(r, 0, sizeof(*r));
 638         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 639         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 640         r->u.trigger.ref = (unsigned long)ref;
 641         r->u.trigger.want = want;
 642         r->u.trigger.need = need;
 643         r->u.trigger.action = (unsigned long)action;
 644         r->u.trigger.as = atomic_read(&adapter->status);
 645         if (port) {
 646                 r->u.trigger.ps = atomic_read(&port->status);
 647                 r->u.trigger.wwpn = port->wwpn;
 648         }
 649         if (sdev)
 650                 r->u.trigger.ls = atomic_read(&sdev_to_zfcp(sdev)->status);
 651         r->u.trigger.fcp_lun = sdev ? zfcp_scsi_dev_lun(sdev) :
 652                                       ZFCP_DBF_INVALID_LUN;
 653         debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
 654         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 655 }
 656
 657 /**
 658  * zfcp_dbf_rec_action - trace event showing progress of recovery action
 659  * @id2: identifier
 660  * @erp_action: error recovery action struct pointer
 661  */
 662 void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
 663 {
 664         struct zfcp_dbf *dbf = erp_action->adapter->dbf;
 665         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 666         unsigned long flags;
 667
 668         spin_lock_irqsave(&dbf->rec_lock, flags);
 669         memset(r, 0, sizeof(*r));
 670         r->id = ZFCP_REC_DBF_ID_ACTION;
 671         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 672         r->u.action.action = (unsigned long)erp_action;
 673         r->u.action.status = erp_action->status;
 674         r->u.action.step = erp_action->step;
 675         r->u.action.fsf_req = erp_action->fsf_req_id;
 676         debug_event(dbf->rec, 5, r, sizeof(*r));
 677         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 678 }
 679
 680 /**
 681  * zfcp_dbf_san_ct_request - trace event for issued CT request
 682  * @fsf_req: request containing issued CT data
 683  * @d_id: destination id where ct request is sent to
 684  */
 685 void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req, u32 d_id)
 686 {
 687         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
 688         struct zfcp_adapter *adapter = fsf_req->adapter;
 689         struct zfcp_dbf *dbf = adapter->dbf;
 690         struct fc_ct_hdr *hdr = sg_virt(ct->req);
 691         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 692         struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
 693         int level = 3;
 694         unsigned long flags;
 695
 696         spin_lock_irqsave(&dbf->san_lock, flags);
 697         memset(r, 0, sizeof(*r));
 698         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 699         r->fsf_reqid = fsf_req->req_id;
 700         r->fsf_seqno = fsf_req->seq_no;
 701         oct->d_id = d_id;
 702         oct->cmd_req_code = hdr->ct_cmd;
 703         oct->revision = hdr->ct_rev;
 704         oct->gs_type = hdr->ct_fs_type;
 705         oct->gs_subtype = hdr->ct_fs_subtype;
 706         oct->options = hdr->ct_options;
 707         oct->max_res_size = hdr->ct_mr_size;
 708         oct->len = min((int)ct->req->length - (int)sizeof(struct fc_ct_hdr),
 709                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 710         debug_event(dbf->san, level, r, sizeof(*r));
 711         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 712                          (void *)hdr + sizeof(struct fc_ct_hdr), oct->len);
 713         spin_unlock_irqrestore(&dbf->san_lock, flags);
 714 }
 715
 716 /**
 717  * zfcp_dbf_san_ct_response - trace event for completion of CT request
 718  * @fsf_req: request containing CT response
 719  */
 720 void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
 721 {
 722         struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
 723         struct zfcp_adapter *adapter = fsf_req->adapter;
 724         struct fc_ct_hdr *hdr = sg_virt(ct->resp);
 725         struct zfcp_dbf *dbf = adapter->dbf;
 726         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 727         struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
 728         int level = 3;
 729         unsigned long flags;
 730
 731         spin_lock_irqsave(&dbf->san_lock, flags);
 732         memset(r, 0, sizeof(*r));
 733         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 734         r->fsf_reqid = fsf_req->req_id;
 735         r->fsf_seqno = fsf_req->seq_no;
 736         rct->cmd_rsp_code = hdr->ct_cmd;
 737         rct->revision = hdr->ct_rev;
 738         rct->reason_code = hdr->ct_reason;
 739         rct->expl = hdr->ct_explan;
 740         rct->vendor_unique = hdr->ct_vendor;
 741         rct->max_res_size = hdr->ct_mr_size;
 742         rct->len = min((int)ct->resp->length - (int)sizeof(struct fc_ct_hdr),
 743                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 744         debug_event(dbf->san, level, r, sizeof(*r));
 745         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 746                          (void *)hdr + sizeof(struct fc_ct_hdr), rct->len);
 747         spin_unlock_irqrestore(&dbf->san_lock, flags);
 748 }
 749
 750 static void zfcp_dbf_san_els(const char *tag, int level,
 751                              struct zfcp_fsf_req *fsf_req, u32 d_id,
 752                              void *buffer, int buflen)
 753 {
 754         struct zfcp_adapter *adapter = fsf_req->adapter;
 755         struct zfcp_dbf *dbf = adapter->dbf;
 756         struct zfcp_dbf_san_record *rec = &dbf->san_buf;
 757         unsigned long flags;
 758
 759         spin_lock_irqsave(&dbf->san_lock, flags);
 760         memset(rec, 0, sizeof(*rec));
 761         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 762         rec->fsf_reqid = fsf_req->req_id;
 763         rec->fsf_seqno = fsf_req->seq_no;
 764         rec->u.els.d_id = d_id;
 765         debug_event(dbf->san, level, rec, sizeof(*rec));
 766         zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
 767                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
 768         spin_unlock_irqrestore(&dbf->san_lock, flags);
 769 }
 770
 771 /**
 772  * zfcp_dbf_san_els_request - trace event for issued ELS
 773  * @fsf_req: request containing issued ELS
 774  */
 775 void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
 776 {
 777         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
 778         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
 779
 780         zfcp_dbf_san_els("oels", 2, fsf_req, d_id,
 781                          sg_virt(els->req), els->req->length);
 782 }
 783
 784 /**
 785  * zfcp_dbf_san_els_response - trace event for completed ELS
 786  * @fsf_req: request containing ELS response
 787  */
 788 void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
 789 {
 790         struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
 791         u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
 792
 793         zfcp_dbf_san_els("rels", 2, fsf_req, d_id,
 794                                sg_virt(els->resp), els->resp->length);
 795 }
 796
 797 /**
 798  * zfcp_dbf_san_incoming_els - trace event for incomig ELS
 799  * @fsf_req: request containing unsolicited status buffer with incoming ELS
 800  */
 801 void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
 802 {
 803         struct fsf_status_read_buffer *buf =
 804                         (struct fsf_status_read_buffer *)fsf_req->data;
 805         int length = (int)buf->length -
 806                      (int)((void *)&buf->payload - (void *)buf);
 807
 808         zfcp_dbf_san_els("iels", 1, fsf_req, ntoh24(buf->d_id),
 809                                (void *)buf->payload.data, length);
 810 }
 811
 812 static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
 813                                     char *out_buf, const char *in_buf)
 814 {
 815         struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
 816         char *p = out_buf;
 817
 818         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 819                 return 0;
 820
 821         zfcp_dbf_tag(&p, "tag", r->tag);
 822         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 823         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 824
 825         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 826                 struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
 827                 zfcp_dbf_out(&p, "d_id", "0x%06x", ct->d_id);
 828                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
 829                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 830                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
 831                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
 832                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
 833                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 834         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 835                 struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
 836                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
 837                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 838                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
 839                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
 840                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
 841                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 842         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 843                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 844                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 845                 struct zfcp_dbf_san_record_els *els = &r->u.els;
 846                 zfcp_dbf_out(&p, "d_id", "0x%06x", els->d_id);
 847         }
 848         return p - out_buf;
 849 }
 850
 851 static struct debug_view zfcp_dbf_san_view = {
 852         .name = "structured",
 853         .header_proc = zfcp_dbf_view_header,
 854         .format_proc = zfcp_dbf_san_view_format,
 855 };
 856
 857 void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
 858                     struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
 859                     struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
 860 {
 861         struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
 862         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 863         unsigned long flags;
 864         struct fcp_resp_with_ext *fcp_rsp;
 865         struct fcp_resp_rsp_info *fcp_rsp_info = NULL;
 866         char *fcp_sns_info = NULL;
 867         int offset = 0, buflen = 0;
 868
 869         spin_lock_irqsave(&dbf->scsi_lock, flags);
 870         do {
 871                 memset(rec, 0, sizeof(*rec));
 872                 if (offset == 0) {
 873                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 874                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 875                         if (scsi_cmnd != NULL) {
 876                                 if (scsi_cmnd->device) {
 877                                         rec->scsi_id = scsi_cmnd->device->id;
 878                                         rec->scsi_lun = scsi_cmnd->device->lun;
 879                                 }
 880                                 rec->scsi_result = scsi_cmnd->result;
 881                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 882                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
 883                                         min((int)scsi_cmnd->cmd_len,
 884                                                 ZFCP_DBF_SCSI_OPCODE));
 885                                 rec->scsi_retries = scsi_cmnd->retries;
 886                                 rec->scsi_allowed = scsi_cmnd->allowed;
 887                         }
 888                         if (fsf_req != NULL) {
 889                                 fcp_rsp = (struct fcp_resp_with_ext *)
 890                                         &(fsf_req->qtcb->bottom.io.fcp_rsp);
 891                                 fcp_rsp_info = (struct fcp_resp_rsp_info *)
 892                                         &fcp_rsp[1];
 893                                 fcp_sns_info = (char *) &fcp_rsp[1];
 894                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
 895                                         fcp_sns_info += fcp_rsp->ext.fr_sns_len;
 896
 897                                 rec->rsp_validity = fcp_rsp->resp.fr_flags;
 898                                 rec->rsp_scsi_status = fcp_rsp->resp.fr_status;
 899                                 rec->rsp_resid = fcp_rsp->ext.fr_resid;
 900                                 if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
 901                                         rec->rsp_code = fcp_rsp_info->rsp_code;
 902                                 if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
 903                                         buflen = min(fcp_rsp->ext.fr_sns_len,
 904                                            (u32)ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 905                                         rec->sns_info_len = buflen;
 906                                         memcpy(rec->sns_info, fcp_sns_info,
 907                                                min(buflen,
 908                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 909                                         offset += min(buflen,
 910                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 911                                 }
 912
 913                                 rec->fsf_reqid = fsf_req->req_id;
 914                                 rec->fsf_seqno = fsf_req->seq_no;
 915                                 rec->fsf_issued = fsf_req->issued;
 916                         }
 917                         rec->old_fsf_reqid = old_req_id;
 918                 } else {
 919                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 920                         dump->total_size = buflen;
 921                         dump->offset = offset;
 922                         dump->size = min(buflen - offset,
 923                                          (int)sizeof(struct
 924                                                      zfcp_dbf_scsi_record) -
 925                                          (int)sizeof(struct zfcp_dbf_dump));
 926                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 927                         offset += dump->size;
 928                 }
 929                 debug_event(dbf->scsi, level, rec, sizeof(*rec));
 930         } while (offset < buflen);
 931         spin_unlock_irqrestore(&dbf->scsi_lock, flags);
 932 }
 933
 934 static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
 935                                      char *out_buf, const char *in_buf)
 936 {
 937         struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
 938         struct timespec t;
 939         char *p = out_buf;
 940
 941         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 942                 return 0;
 943
 944         zfcp_dbf_tag(&p, "tag", r->tag);
 945         zfcp_dbf_tag(&p, "tag2", r->tag2);
 946         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
 947         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
 948         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
 949         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
 950         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
 951                       0, ZFCP_DBF_SCSI_OPCODE);
 952         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
 953         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
 954         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
 955                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
 956         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 957         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 958         stck_to_timespec(r->fsf_issued, &t);
 959         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 960
 961         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 962                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
 963                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
 964                              r->rsp_scsi_status);
 965                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
 966                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
 967                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
 968                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
 969                               min((int)r->sns_info_len,
 970                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 971                               r->sns_info_len);
 972         }
 973         p += sprintf(p, "\n");
 974         return p - out_buf;
 975 }
 976
 977 static struct debug_view zfcp_dbf_scsi_view = {
 978         .name = "structured",
 979         .header_proc = zfcp_dbf_view_header,
 980         .format_proc = zfcp_dbf_scsi_view_format,
 981 };
 982
 983 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
 984                                   struct debug_view *view, int size)
 985 {
 986         struct debug_info *d;
 987
 988         d = debug_register(name, dbfsize, level, size);
 989         if (!d)
 990                 return NULL;
 991
 992         debug_register_view(d, &debug_hex_ascii_view);
 993         debug_register_view(d, view);
 994         debug_set_level(d, level);
 995
 996         return d;
 997 }
 998
 999 /**
1000  * zfcp_adapter_debug_register - registers debug feature for an adapter
1001  * @adapter: pointer to adapter for which debug features should be registered
1002  * return: -ENOMEM on error, 0 otherwise
1003  */
1004 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
1005 {
1006         char dbf_name[DEBUG_MAX_NAME_LEN];
1007         struct zfcp_dbf *dbf;
1008
1009         dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
1010         if (!dbf)
1011                 return -ENOMEM;
1012
1013         dbf->adapter = adapter;
1014
1015         spin_lock_init(&dbf->hba_lock);
1016         spin_lock_init(&dbf->san_lock);
1017         spin_lock_init(&dbf->scsi_lock);
1018         spin_lock_init(&dbf->rec_lock);
1019
1020         /* debug feature area which records recovery activity */
1021         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1022         dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
1023                                 sizeof(struct zfcp_dbf_rec_record));
1024         if (!dbf->rec)
1025                 goto err_out;
1026
1027         /* debug feature area which records HBA (FSF and QDIO) conditions */
1028         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1029         dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
1030                                 sizeof(struct zfcp_dbf_hba_record));
1031         if (!dbf->hba)
1032                 goto err_out;
1033
1034         /* debug feature area which records SAN command failures and recovery */
1035         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1036         dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
1037                                 sizeof(struct zfcp_dbf_san_record));
1038         if (!dbf->san)
1039                 goto err_out;
1040
1041         /* debug feature area which records SCSI command failures and recovery */
1042         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1043         dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
1044                                  sizeof(struct zfcp_dbf_scsi_record));
1045         if (!dbf->scsi)
1046                 goto err_out;
1047
1048         adapter->dbf = dbf;
1049         return 0;
1050
1051 err_out:
1052         zfcp_dbf_adapter_unregister(dbf);
1053         return -ENOMEM;
1054 }
1055
1056 /**
1057  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1058  * @dbf: pointer to dbf for which debug features should be unregistered
1059  */
1060 void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
1061 {
1062         if (!dbf)
1063                 return;
1064         debug_unregister(dbf->scsi);
1065         debug_unregister(dbf->san);
1066         debug_unregister(dbf->hba);
1067         debug_unregister(dbf->rec);
1068         dbf->adapter->dbf = NULL;
1069         kfree(dbf);
1070 }
1071