SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/s390/scsi/zfcp_dbf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Debug traces for zfcp.
   5  *
   6  * Copyright IBM Corporation 2002, 2009
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/ctype.h>
  13 #include <asm/debug.h>
  14 #include "zfcp_dbf.h"
  15 #include "zfcp_ext.h"
  16
  17 static u32 dbfsize = 4;
  18
  19 module_param(dbfsize, uint, 0400);
  20 MODULE_PARM_DESC(dbfsize,
  21                  "number of pages for each debug feature area (default 4)");
  22
  23 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  24                              int level, char *from, int from_len)
  25 {
  26         int offset;
  27         struct zfcp_dbf_dump *dump = to;
  28         int room = to_len - sizeof(*dump);
  29
  30         for (offset = 0; offset < from_len; offset += dump->size) {
  31                 memset(to, 0, to_len);
  32                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  33                 dump->total_size = from_len;
  34                 dump->offset = offset;
  35                 dump->size = min(from_len - offset, room);
  36                 memcpy(dump->data, from + offset, dump->size);
  37                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
  38         }
  39 }
  40
  41 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  42 {
  43         int i;
  44
  45         *p += sprintf(*p, "%-24s", label);
  46         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  47                 *p += sprintf(*p, "%c", tag[i]);
  48         *p += sprintf(*p, "\n");
  49 }
  50
  51 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  52 {
  53         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  54 }
  55
  56 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  57 {
  58         va_list arg;
  59
  60         *buf += sprintf(*buf, "%-24s", s);
  61         va_start(arg, format);
  62         *buf += vsprintf(*buf, format, arg);
  63         va_end(arg);
  64         *buf += sprintf(*buf, "\n");
  65 }
  66
  67 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  68                           int buflen, int offset, int total_size)
  69 {
  70         if (!offset)
  71                 *p += sprintf(*p, "%-24s  ", label);
  72         while (buflen--) {
  73                 if (offset > 0) {
  74                         if ((offset % 32) == 0)
  75                                 *p += sprintf(*p, "\n%-24c  ", ' ');
  76                         else if ((offset % 4) == 0)
  77                                 *p += sprintf(*p, " ");
  78                 }
  79                 *p += sprintf(*p, "%02x", *buffer++);
  80                 if (++offset == total_size) {
  81                         *p += sprintf(*p, "\n");
  82                         break;
  83                 }
  84         }
  85         if (!total_size)
  86                 *p += sprintf(*p, "\n");
  87 }
  88
  89 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
  90                                 int area, debug_entry_t *entry, char *out_buf)
  91 {
  92         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
  93         struct timespec t;
  94         char *p = out_buf;
  95
  96         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
  97                 stck_to_timespec(entry->id.stck, &t);
  98                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
  99                              t.tv_sec, t.tv_nsec);
 100                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 101         } else  {
 102                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
 103                               dump->total_size);
 104                 if ((dump->offset + dump->size) == dump->total_size)
 105                         p += sprintf(p, "\n");
 106         }
 107         return p - out_buf;
 108 }
 109
 110 void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
 111                                 struct zfcp_fsf_req *fsf_req,
 112                                 struct zfcp_dbf *dbf)
 113 {
 114         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 115         union fsf_prot_status_qual *prot_status_qual =
 116                                         &qtcb->prefix.prot_status_qual;
 117         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 118         struct scsi_cmnd *scsi_cmnd;
 119         struct zfcp_port *port;
 120         struct zfcp_unit *unit;
 121         struct zfcp_send_els *send_els;
 122         struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 123         struct zfcp_dbf_hba_record_response *response = &rec->u.response;
 124         unsigned long flags;
 125
 126         spin_lock_irqsave(&dbf->hba_lock, flags);
 127         memset(rec, 0, sizeof(*rec));
 128         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 129         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 130
 131         response->fsf_command = fsf_req->fsf_command;
 132         response->fsf_reqid = fsf_req->req_id;
 133         response->fsf_seqno = fsf_req->seq_no;
 134         response->fsf_issued = fsf_req->issued;
 135         response->fsf_prot_status = qtcb->prefix.prot_status;
 136         response->fsf_status = qtcb->header.fsf_status;
 137         memcpy(response->fsf_prot_status_qual,
 138                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 139         memcpy(response->fsf_status_qual,
 140                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 141         response->fsf_req_status = fsf_req->status;
 142         response->sbal_first = fsf_req->queue_req.sbal_first;
 143         response->sbal_last = fsf_req->queue_req.sbal_last;
 144         response->sbal_response = fsf_req->queue_req.sbal_response;
 145         response->pool = fsf_req->pool != NULL;
 146         response->erp_action = (unsigned long)fsf_req->erp_action;
 147
 148         switch (fsf_req->fsf_command) {
 149         case FSF_QTCB_FCP_CMND:
 150                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 151                         break;
 152                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 153                 if (scsi_cmnd) {
 154                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 155                         response->u.fcp.serial = scsi_cmnd->serial_number;
 156                 }
 157                 break;
 158
 159         case FSF_QTCB_OPEN_PORT_WITH_DID:
 160         case FSF_QTCB_CLOSE_PORT:
 161         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 162                 port = (struct zfcp_port *)fsf_req->data;
 163                 response->u.port.wwpn = port->wwpn;
 164                 response->u.port.d_id = port->d_id;
 165                 response->u.port.port_handle = qtcb->header.port_handle;
 166                 break;
 167
 168         case FSF_QTCB_OPEN_LUN:
 169         case FSF_QTCB_CLOSE_LUN:
 170                 unit = (struct zfcp_unit *)fsf_req->data;
 171                 port = unit->port;
 172                 response->u.unit.wwpn = port->wwpn;
 173                 response->u.unit.fcp_lun = unit->fcp_lun;
 174                 response->u.unit.port_handle = qtcb->header.port_handle;
 175                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 176                 break;
 177
 178         case FSF_QTCB_SEND_ELS:
 179                 send_els = (struct zfcp_send_els *)fsf_req->data;
 180                 response->u.els.d_id = qtcb->bottom.support.d_id;
 181                 response->u.els.ls_code = send_els->ls_code >> 24;
 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                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
 352                 break;
 353
 354         case FSF_QTCB_ABORT_FCP_CMND:
 355         case FSF_QTCB_SEND_GENERIC:
 356         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 357         case FSF_QTCB_EXCHANGE_PORT_DATA:
 358         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 359         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 360                 break;
 361         }
 362 }
 363
 364 static void zfcp_dbf_hba_view_status(char **p,
 365                                      struct zfcp_dbf_hba_record_status *r)
 366 {
 367         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 368         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 369         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 370         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 371                       sizeof(struct fsf_queue_designator), 0,
 372                       sizeof(struct fsf_queue_designator));
 373         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 374                       r->payload_size);
 375 }
 376
 377 static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
 378 {
 379         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 380         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 381         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 382 }
 383
 384 static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
 385 {
 386         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 387         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
 388         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
 389         zfcp_dbf_out(p, "prim_seq_err", "%d",
 390                      r->primitive_sequence_error_count);
 391         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
 392                      r->invalid_transmission_word_error_count);
 393         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
 394         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
 395                      r->primitive_sequence_event_timeout_count);
 396         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
 397                      r->elastic_buffer_overrun_error_count);
 398         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
 399                      r->advertised_receive_b2b_credit);
 400         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
 401                      r->current_receive_b2b_credit);
 402         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
 403                      r->advertised_transmit_b2b_credit);
 404         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
 405                      r->current_transmit_b2b_credit);
 406 }
 407
 408 static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
 409                                     char *out_buf, const char *in_buf)
 410 {
 411         struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
 412         char *p = out_buf;
 413
 414         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 415                 return 0;
 416
 417         zfcp_dbf_tag(&p, "tag", r->tag);
 418         if (isalpha(r->tag2[0]))
 419                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 420
 421         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 422                 zfcp_dbf_hba_view_response(&p, &r->u.response);
 423         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 424                 zfcp_dbf_hba_view_status(&p, &r->u.status);
 425         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 426                 zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
 427         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
 428                 zfcp_dbf_hba_view_berr(&p, &r->u.berr);
 429
 430         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 431                 p += sprintf(p, "\n");
 432         return p - out_buf;
 433 }
 434
 435 static struct debug_view zfcp_dbf_hba_view = {
 436         .name = "structured",
 437         .header_proc = zfcp_dbf_view_header,
 438         .format_proc = zfcp_dbf_hba_view_format,
 439 };
 440
 441 static const char *zfcp_dbf_rec_tags[] = {
 442         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 443         [ZFCP_REC_DBF_ID_TARGET] = "target",
 444         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 445         [ZFCP_REC_DBF_ID_ACTION] = "action",
 446 };
 447
 448 static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
 449                                     char *buf, const char *_rec)
 450 {
 451         struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
 452         char *p = buf;
 453         char hint[ZFCP_DBF_ID_SIZE + 1];
 454
 455         memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
 456         hint[ZFCP_DBF_ID_SIZE] = 0;
 457         zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
 458         zfcp_dbf_outs(&p, "hint", hint);
 459         switch (r->id) {
 460         case ZFCP_REC_DBF_ID_THREAD:
 461                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 462                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 463                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 464                 break;
 465         case ZFCP_REC_DBF_ID_TARGET:
 466                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 467                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 468                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 469                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 470                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 471                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 472                 break;
 473         case ZFCP_REC_DBF_ID_TRIGGER:
 474                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 475                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 476                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 477                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 478                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 479                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 480                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 481                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 482                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 483                 break;
 484         case ZFCP_REC_DBF_ID_ACTION:
 485                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 486                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 487                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 488                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 489                 break;
 490         }
 491         p += sprintf(p, "\n");
 492         return p - buf;
 493 }
 494
 495 static struct debug_view zfcp_dbf_rec_view = {
 496         .name = "structured",
 497         .header_proc = zfcp_dbf_view_header,
 498         .format_proc = zfcp_dbf_rec_view_format,
 499 };
 500
 501 /**
 502  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 503  * @id2: identifier for event
 504  * @dbf: reference to dbf structure
 505  * This function assumes that the caller is holding erp_lock.
 506  */
 507 void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
 508 {
 509         struct zfcp_adapter *adapter = dbf->adapter;
 510         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 511         unsigned long flags = 0;
 512         struct list_head *entry;
 513         unsigned ready = 0, running = 0, total;
 514
 515         list_for_each(entry, &adapter->erp_ready_head)
 516                 ready++;
 517         list_for_each(entry, &adapter->erp_running_head)
 518                 running++;
 519         total = adapter->erp_total_count;
 520
 521         spin_lock_irqsave(&dbf->rec_lock, flags);
 522         memset(r, 0, sizeof(*r));
 523         r->id = ZFCP_REC_DBF_ID_THREAD;
 524         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 525         r->u.thread.total = total;
 526         r->u.thread.ready = ready;
 527         r->u.thread.running = running;
 528         debug_event(dbf->rec, 6, r, sizeof(*r));
 529         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 530 }
 531
 532 /**
 533  * zfcp_dbf_rec_thread - trace event related to recovery thread operation
 534  * @id2: identifier for event
 535  * @adapter: adapter
 536  * This function assumes that the caller does not hold erp_lock.
 537  */
 538 void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
 539 {
 540         struct zfcp_adapter *adapter = dbf->adapter;
 541         unsigned long flags;
 542
 543         read_lock_irqsave(&adapter->erp_lock, flags);
 544         zfcp_dbf_rec_thread(id2, dbf);
 545         read_unlock_irqrestore(&adapter->erp_lock, flags);
 546 }
 547
 548 static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
 549                                 atomic_t *status, atomic_t *erp_count, u64 wwpn,
 550                                 u32 d_id, u64 fcp_lun)
 551 {
 552         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 553         unsigned long flags;
 554
 555         spin_lock_irqsave(&dbf->rec_lock, flags);
 556         memset(r, 0, sizeof(*r));
 557         r->id = ZFCP_REC_DBF_ID_TARGET;
 558         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 559         r->u.target.ref = (unsigned long)ref;
 560         r->u.target.status = atomic_read(status);
 561         r->u.target.wwpn = wwpn;
 562         r->u.target.d_id = d_id;
 563         r->u.target.fcp_lun = fcp_lun;
 564         r->u.target.erp_count = atomic_read(erp_count);
 565         debug_event(dbf->rec, 3, r, sizeof(*r));
 566         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 567 }
 568
 569 /**
 570  * zfcp_dbf_rec_adapter - trace event for adapter state change
 571  * @id: identifier for trigger of state change
 572  * @ref: additional reference (e.g. request)
 573  * @dbf: reference to dbf structure
 574  */
 575 void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
 576 {
 577         struct zfcp_adapter *adapter = dbf->adapter;
 578
 579         zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
 580                                   &adapter->erp_counter, 0, 0, 0);
 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                                   0);
 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->fcp_lun;
 649         }
 650         debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
 651         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 652 }
 653
 654 /**
 655  * zfcp_dbf_rec_action - trace event showing progress of recovery action
 656  * @id2: identifier
 657  * @erp_action: error recovery action struct pointer
 658  */
 659 void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
 660 {
 661         struct zfcp_dbf *dbf = erp_action->adapter->dbf;
 662         struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 663         unsigned long flags;
 664
 665         spin_lock_irqsave(&dbf->rec_lock, flags);
 666         memset(r, 0, sizeof(*r));
 667         r->id = ZFCP_REC_DBF_ID_ACTION;
 668         memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 669         r->u.action.action = (unsigned long)erp_action;
 670         r->u.action.status = erp_action->status;
 671         r->u.action.step = erp_action->step;
 672         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
 673         debug_event(dbf->rec, 5, r, sizeof(*r));
 674         spin_unlock_irqrestore(&dbf->rec_lock, flags);
 675 }
 676
 677 /**
 678  * zfcp_dbf_san_ct_request - trace event for issued CT request
 679  * @fsf_req: request containing issued CT data
 680  */
 681 void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req)
 682 {
 683         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 684         struct zfcp_wka_port *wka_port = ct->wka_port;
 685         struct zfcp_adapter *adapter = wka_port->adapter;
 686         struct zfcp_dbf *dbf = adapter->dbf;
 687         struct ct_hdr *hdr = sg_virt(ct->req);
 688         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 689         struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
 690         int level = 3;
 691         unsigned long flags;
 692
 693         spin_lock_irqsave(&dbf->san_lock, flags);
 694         memset(r, 0, sizeof(*r));
 695         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 696         r->fsf_reqid = fsf_req->req_id;
 697         r->fsf_seqno = fsf_req->seq_no;
 698         r->s_id = fc_host_port_id(adapter->scsi_host);
 699         r->d_id = wka_port->d_id;
 700         oct->cmd_req_code = hdr->cmd_rsp_code;
 701         oct->revision = hdr->revision;
 702         oct->gs_type = hdr->gs_type;
 703         oct->gs_subtype = hdr->gs_subtype;
 704         oct->options = hdr->options;
 705         oct->max_res_size = hdr->max_res_size;
 706         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 707                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 708         debug_event(dbf->san, level, r, sizeof(*r));
 709         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 710                          (void *)hdr + sizeof(struct ct_hdr), oct->len);
 711         spin_unlock_irqrestore(&dbf->san_lock, flags);
 712 }
 713
 714 /**
 715  * zfcp_dbf_san_ct_response - trace event for completion of CT request
 716  * @fsf_req: request containing CT response
 717  */
 718 void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
 719 {
 720         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 721         struct zfcp_wka_port *wka_port = ct->wka_port;
 722         struct zfcp_adapter *adapter = wka_port->adapter;
 723         struct ct_hdr *hdr = sg_virt(ct->resp);
 724         struct zfcp_dbf *dbf = adapter->dbf;
 725         struct zfcp_dbf_san_record *r = &dbf->san_buf;
 726         struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
 727         int level = 3;
 728         unsigned long flags;
 729
 730         spin_lock_irqsave(&dbf->san_lock, flags);
 731         memset(r, 0, sizeof(*r));
 732         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 733         r->fsf_reqid = fsf_req->req_id;
 734         r->fsf_seqno = fsf_req->seq_no;
 735         r->s_id = wka_port->d_id;
 736         r->d_id = fc_host_port_id(adapter->scsi_host);
 737         rct->cmd_rsp_code = hdr->cmd_rsp_code;
 738         rct->revision = hdr->revision;
 739         rct->reason_code = hdr->reason_code;
 740         rct->expl = hdr->reason_code_expl;
 741         rct->vendor_unique = hdr->vendor_unique;
 742         rct->max_res_size = hdr->max_res_size;
 743         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 744                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 745         debug_event(dbf->san, level, r, sizeof(*r));
 746         zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 747                          (void *)hdr + sizeof(struct ct_hdr), rct->len);
 748         spin_unlock_irqrestore(&dbf->san_lock, flags);
 749 }
 750
 751 static void zfcp_dbf_san_els(const char *tag, int level,
 752                              struct zfcp_fsf_req *fsf_req, u32 s_id, u32 d_id,
 753                              u8 ls_code, void *buffer, int buflen)
 754 {
 755         struct zfcp_adapter *adapter = fsf_req->adapter;
 756         struct zfcp_dbf *dbf = adapter->dbf;
 757         struct zfcp_dbf_san_record *rec = &dbf->san_buf;
 758         unsigned long flags;
 759
 760         spin_lock_irqsave(&dbf->san_lock, flags);
 761         memset(rec, 0, sizeof(*rec));
 762         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 763         rec->fsf_reqid = fsf_req->req_id;
 764         rec->fsf_seqno = fsf_req->seq_no;
 765         rec->s_id = s_id;
 766         rec->d_id = d_id;
 767         rec->u.els.ls_code = ls_code;
 768         debug_event(dbf->san, level, rec, sizeof(*rec));
 769         zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
 770                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
 771         spin_unlock_irqrestore(&dbf->san_lock, flags);
 772 }
 773
 774 /**
 775  * zfcp_dbf_san_els_request - trace event for issued ELS
 776  * @fsf_req: request containing issued ELS
 777  */
 778 void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
 779 {
 780         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 781
 782         zfcp_dbf_san_els("oels", 2, fsf_req,
 783                                fc_host_port_id(els->adapter->scsi_host),
 784                                els->d_id, *(u8 *) sg_virt(els->req),
 785                                sg_virt(els->req), els->req->length);
 786 }
 787
 788 /**
 789  * zfcp_dbf_san_els_response - trace event for completed ELS
 790  * @fsf_req: request containing ELS response
 791  */
 792 void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
 793 {
 794         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 795
 796         zfcp_dbf_san_els("rels", 2, fsf_req, els->d_id,
 797                                fc_host_port_id(els->adapter->scsi_host),
 798                                *(u8 *)sg_virt(els->req), sg_virt(els->resp),
 799                                els->resp->length);
 800 }
 801
 802 /**
 803  * zfcp_dbf_san_incoming_els - trace event for incomig ELS
 804  * @fsf_req: request containing unsolicited status buffer with incoming ELS
 805  */
 806 void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
 807 {
 808         struct zfcp_adapter *adapter = fsf_req->adapter;
 809         struct fsf_status_read_buffer *buf =
 810                         (struct fsf_status_read_buffer *)fsf_req->data;
 811         int length = (int)buf->length -
 812                      (int)((void *)&buf->payload - (void *)buf);
 813
 814         zfcp_dbf_san_els("iels", 1, fsf_req, buf->d_id,
 815                                fc_host_port_id(adapter->scsi_host),
 816                                buf->payload.data[0], (void *)buf->payload.data,
 817                                length);
 818 }
 819
 820 static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
 821                                     char *out_buf, const char *in_buf)
 822 {
 823         struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
 824         char *p = out_buf;
 825
 826         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 827                 return 0;
 828
 829         zfcp_dbf_tag(&p, "tag", r->tag);
 830         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 831         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 832         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
 833         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
 834
 835         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
 836                 struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
 837                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
 838                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 839                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
 840                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
 841                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
 842                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 843         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
 844                 struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
 845                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
 846                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 847                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
 848                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
 849                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
 850                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 851         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 852                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 853                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
 854                 struct zfcp_dbf_san_record_els *els = &r->u.els;
 855                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
 856         }
 857         return p - out_buf;
 858 }
 859
 860 static struct debug_view zfcp_dbf_san_view = {
 861         .name = "structured",
 862         .header_proc = zfcp_dbf_view_header,
 863         .format_proc = zfcp_dbf_san_view_format,
 864 };
 865
 866 void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
 867                     struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
 868                     struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
 869 {
 870         struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
 871         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 872         unsigned long flags;
 873         struct fcp_rsp_iu *fcp_rsp;
 874         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 875         int offset = 0, buflen = 0;
 876
 877         spin_lock_irqsave(&dbf->scsi_lock, flags);
 878         do {
 879                 memset(rec, 0, sizeof(*rec));
 880                 if (offset == 0) {
 881                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 882                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 883                         if (scsi_cmnd != NULL) {
 884                                 if (scsi_cmnd->device) {
 885                                         rec->scsi_id = scsi_cmnd->device->id;
 886                                         rec->scsi_lun = scsi_cmnd->device->lun;
 887                                 }
 888                                 rec->scsi_result = scsi_cmnd->result;
 889                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
 890                                 rec->scsi_serial = scsi_cmnd->serial_number;
 891                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
 892                                         min((int)scsi_cmnd->cmd_len,
 893                                                 ZFCP_DBF_SCSI_OPCODE));
 894                                 rec->scsi_retries = scsi_cmnd->retries;
 895                                 rec->scsi_allowed = scsi_cmnd->allowed;
 896                         }
 897                         if (fsf_req != NULL) {
 898                                 fcp_rsp = (struct fcp_rsp_iu *)
 899                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
 900                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
 901                                 fcp_sns_info =
 902                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 903
 904                                 rec->rsp_validity = fcp_rsp->validity.value;
 905                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
 906                                 rec->rsp_resid = fcp_rsp->fcp_resid;
 907                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
 908                                         rec->rsp_code = *(fcp_rsp_info + 3);
 909                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 910                                         buflen = min((int)fcp_rsp->fcp_sns_len,
 911                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
 912                                         rec->sns_info_len = buflen;
 913                                         memcpy(rec->sns_info, fcp_sns_info,
 914                                                min(buflen,
 915                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
 916                                         offset += min(buflen,
 917                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
 918                                 }
 919
 920                                 rec->fsf_reqid = fsf_req->req_id;
 921                                 rec->fsf_seqno = fsf_req->seq_no;
 922                                 rec->fsf_issued = fsf_req->issued;
 923                         }
 924                         rec->old_fsf_reqid = old_req_id;
 925                 } else {
 926                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 927                         dump->total_size = buflen;
 928                         dump->offset = offset;
 929                         dump->size = min(buflen - offset,
 930                                          (int)sizeof(struct
 931                                                      zfcp_dbf_scsi_record) -
 932                                          (int)sizeof(struct zfcp_dbf_dump));
 933                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
 934                         offset += dump->size;
 935                 }
 936                 debug_event(dbf->scsi, level, rec, sizeof(*rec));
 937         } while (offset < buflen);
 938         spin_unlock_irqrestore(&dbf->scsi_lock, flags);
 939 }
 940
 941 static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
 942                                      char *out_buf, const char *in_buf)
 943 {
 944         struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
 945         struct timespec t;
 946         char *p = out_buf;
 947
 948         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 949                 return 0;
 950
 951         zfcp_dbf_tag(&p, "tag", r->tag);
 952         zfcp_dbf_tag(&p, "tag2", r->tag2);
 953         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
 954         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
 955         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
 956         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
 957         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
 958         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
 959                       0, ZFCP_DBF_SCSI_OPCODE);
 960         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
 961         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
 962         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
 963                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
 964         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 965         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 966         stck_to_timespec(r->fsf_issued, &t);
 967         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 968
 969         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
 970                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
 971                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
 972                              r->rsp_scsi_status);
 973                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
 974                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
 975                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
 976                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
 977                               min((int)r->sns_info_len,
 978                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
 979                               r->sns_info_len);
 980         }
 981         p += sprintf(p, "\n");
 982         return p - out_buf;
 983 }
 984
 985 static struct debug_view zfcp_dbf_scsi_view = {
 986         .name = "structured",
 987         .header_proc = zfcp_dbf_view_header,
 988         .format_proc = zfcp_dbf_scsi_view_format,
 989 };
 990
 991 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
 992                                   struct debug_view *view, int size)
 993 {
 994         struct debug_info *d;
 995
 996         d = debug_register(name, dbfsize, level, size);
 997         if (!d)
 998                 return NULL;
 999
1000         debug_register_view(d, &debug_hex_ascii_view);
1001         debug_register_view(d, view);
1002         debug_set_level(d, level);
1003
1004         return d;
1005 }
1006
1007 /**
1008  * zfcp_adapter_debug_register - registers debug feature for an adapter
1009  * @adapter: pointer to adapter for which debug features should be registered
1010  * return: -ENOMEM on error, 0 otherwise
1011  */
1012 int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
1013 {
1014         char dbf_name[DEBUG_MAX_NAME_LEN];
1015         struct zfcp_dbf *dbf;
1016
1017         dbf = kmalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
1018         if (!dbf)
1019                 return -ENOMEM;
1020
1021         dbf->adapter = adapter;
1022
1023         spin_lock_init(&dbf->hba_lock);
1024         spin_lock_init(&dbf->san_lock);
1025         spin_lock_init(&dbf->scsi_lock);
1026         spin_lock_init(&dbf->rec_lock);
1027
1028         /* debug feature area which records recovery activity */
1029         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1030         dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
1031                                 sizeof(struct zfcp_dbf_rec_record));
1032         if (!dbf->rec)
1033                 goto err_out;
1034
1035         /* debug feature area which records HBA (FSF and QDIO) conditions */
1036         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1037         dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
1038                                 sizeof(struct zfcp_dbf_hba_record));
1039         if (!dbf->hba)
1040                 goto err_out;
1041
1042         /* debug feature area which records SAN command failures and recovery */
1043         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1044         dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
1045                                 sizeof(struct zfcp_dbf_san_record));
1046         if (!dbf->san)
1047                 goto err_out;
1048
1049         /* debug feature area which records SCSI command failures and recovery */
1050         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1051         dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
1052                                  sizeof(struct zfcp_dbf_scsi_record));
1053         if (!dbf->scsi)
1054                 goto err_out;
1055
1056         adapter->dbf = dbf;
1057         return 0;
1058
1059 err_out:
1060         zfcp_dbf_adapter_unregister(dbf);
1061         return -ENOMEM;
1062 }
1063
1064 /**
1065  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1066  * @dbf: pointer to dbf for which debug features should be unregistered
1067  */
1068 void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
1069 {
1070         debug_unregister(dbf->scsi);
1071         debug_unregister(dbf->san);
1072         debug_unregister(dbf->hba);
1073         debug_unregister(dbf->rec);
1074         dbf->adapter->dbf = NULL;
1075         kfree(dbf);
1076 }
1077