git.oblomov.eu Git - 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, 2008
   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_ext.h"
  15
  16 static u32 dbfsize = 4;
  17
  18 module_param(dbfsize, uint, 0400);
  19 MODULE_PARM_DESC(dbfsize,
  20                  "number of pages for each debug feature area (default 4)");
  21
  22 static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
  23                              int level, char *from, int from_len)
  24 {
  25         int offset;
  26         struct zfcp_dbf_dump *dump = to;
  27         int room = to_len - sizeof(*dump);
  28
  29         for (offset = 0; offset < from_len; offset += dump->size) {
  30                 memset(to, 0, to_len);
  31                 strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
  32                 dump->total_size = from_len;
  33                 dump->offset = offset;
  34                 dump->size = min(from_len - offset, room);
  35                 memcpy(dump->data, from + offset, dump->size);
  36                 debug_event(dbf, level, dump, dump->size + sizeof(*dump));
  37         }
  38 }
  39
  40 /* FIXME: this duplicate this code in s390 debug feature */
  41 static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
  42 {
  43         unsigned long long sec;
  44
  45         stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
  46         sec = stck >> 12;
  47         do_div(sec, 1000000);
  48         time->tv_sec = sec;
  49         stck -= (sec * 1000000) << 12;
  50         time->tv_nsec = ((stck * 1000) >> 12);
  51 }
  52
  53 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
  54 {
  55         int i;
  56
  57         *p += sprintf(*p, "%-24s", label);
  58         for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
  59                 *p += sprintf(*p, "%c", tag[i]);
  60         *p += sprintf(*p, "\n");
  61 }
  62
  63 static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
  64 {
  65         *buf += sprintf(*buf, "%-24s%s\n", s1, s2);
  66 }
  67
  68 static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
  69 {
  70         va_list arg;
  71
  72         *buf += sprintf(*buf, "%-24s", s);
  73         va_start(arg, format);
  74         *buf += vsprintf(*buf, format, arg);
  75         va_end(arg);
  76         *buf += sprintf(*buf, "\n");
  77 }
  78
  79 static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
  80                           int buflen, int offset, int total_size)
  81 {
  82         if (!offset)
  83                 *p += sprintf(*p, "%-24s  ", label);
  84         while (buflen--) {
  85                 if (offset > 0) {
  86                         if ((offset % 32) == 0)
  87                                 *p += sprintf(*p, "\n%-24c  ", ' ');
  88                         else if ((offset % 4) == 0)
  89                                 *p += sprintf(*p, " ");
  90                 }
  91                 *p += sprintf(*p, "%02x", *buffer++);
  92                 if (++offset == total_size) {
  93                         *p += sprintf(*p, "\n");
  94                         break;
  95                 }
  96         }
  97         if (!total_size)
  98                 *p += sprintf(*p, "\n");
  99 }
 100
 101 static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
 102                                 int area, debug_entry_t *entry, char *out_buf)
 103 {
 104         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
 105         struct timespec t;
 106         char *p = out_buf;
 107
 108         if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
 109                 zfcp_dbf_timestamp(entry->id.stck, &t);
 110                 zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 111                              t.tv_sec, t.tv_nsec);
 112                 zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
 113         } else  {
 114                 zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
 115                               dump->total_size);
 116                 if ((dump->offset + dump->size) == dump->total_size)
 117                         p += sprintf(p, "\n");
 118         }
 119         return p - out_buf;
 120 }
 121
 122 /**
 123  * zfcp_hba_dbf_event_fsf_response - trace event for request completion
 124  * @fsf_req: request that has been completed
 125  */
 126 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 127 {
 128         struct zfcp_adapter *adapter = fsf_req->adapter;
 129         struct fsf_qtcb *qtcb = fsf_req->qtcb;
 130         union fsf_prot_status_qual *prot_status_qual =
 131                                         &qtcb->prefix.prot_status_qual;
 132         union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 133         struct scsi_cmnd *scsi_cmnd;
 134         struct zfcp_port *port;
 135         struct zfcp_unit *unit;
 136         struct zfcp_send_els *send_els;
 137         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 138         struct zfcp_hba_dbf_record_response *response = &rec->u.response;
 139         int level;
 140         unsigned long flags;
 141
 142         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 143         memset(rec, 0, sizeof(*rec));
 144         strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 145
 146         if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 147             (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
 148                 strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
 149                 level = 1;
 150         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 151                 strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
 152                 level = 1;
 153         } else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 154                    (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 155                 strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 156                 level = 4;
 157         } else if (qtcb->header.log_length) {
 158                 strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
 159                 level = 5;
 160         } else {
 161                 strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 162                 level = 6;
 163         }
 164
 165         response->fsf_command = fsf_req->fsf_command;
 166         response->fsf_reqid = (unsigned long)fsf_req;
 167         response->fsf_seqno = fsf_req->seq_no;
 168         response->fsf_issued = fsf_req->issued;
 169         response->fsf_prot_status = qtcb->prefix.prot_status;
 170         response->fsf_status = qtcb->header.fsf_status;
 171         memcpy(response->fsf_prot_status_qual,
 172                prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
 173         memcpy(response->fsf_status_qual,
 174                fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 175         response->fsf_req_status = fsf_req->status;
 176         response->sbal_first = fsf_req->sbal_first;
 177         response->sbal_last = fsf_req->sbal_last;
 178         response->sbal_response = fsf_req->sbal_response;
 179         response->pool = fsf_req->pool != NULL;
 180         response->erp_action = (unsigned long)fsf_req->erp_action;
 181
 182         switch (fsf_req->fsf_command) {
 183         case FSF_QTCB_FCP_CMND:
 184                 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 185                         break;
 186                 scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
 187                 if (scsi_cmnd) {
 188                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
 189                         response->u.fcp.serial = scsi_cmnd->serial_number;
 190                 }
 191                 break;
 192
 193         case FSF_QTCB_OPEN_PORT_WITH_DID:
 194         case FSF_QTCB_CLOSE_PORT:
 195         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 196                 port = (struct zfcp_port *)fsf_req->data;
 197                 response->u.port.wwpn = port->wwpn;
 198                 response->u.port.d_id = port->d_id;
 199                 response->u.port.port_handle = qtcb->header.port_handle;
 200                 break;
 201
 202         case FSF_QTCB_OPEN_LUN:
 203         case FSF_QTCB_CLOSE_LUN:
 204                 unit = (struct zfcp_unit *)fsf_req->data;
 205                 port = unit->port;
 206                 response->u.unit.wwpn = port->wwpn;
 207                 response->u.unit.fcp_lun = unit->fcp_lun;
 208                 response->u.unit.port_handle = qtcb->header.port_handle;
 209                 response->u.unit.lun_handle = qtcb->header.lun_handle;
 210                 break;
 211
 212         case FSF_QTCB_SEND_ELS:
 213                 send_els = (struct zfcp_send_els *)fsf_req->data;
 214                 response->u.els.d_id = qtcb->bottom.support.d_id;
 215                 response->u.els.ls_code = send_els->ls_code >> 24;
 216                 break;
 217
 218         case FSF_QTCB_ABORT_FCP_CMND:
 219         case FSF_QTCB_SEND_GENERIC:
 220         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 221         case FSF_QTCB_EXCHANGE_PORT_DATA:
 222         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 223         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 224                 break;
 225         }
 226
 227         debug_event(adapter->hba_dbf, level, rec, sizeof(*rec));
 228
 229         /* have fcp channel microcode fixed to use as little as possible */
 230         if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
 231                 /* adjust length skipping trailing zeros */
 232                 char *buf = (char *)qtcb + qtcb->header.log_start;
 233                 int len = qtcb->header.log_length;
 234                 for (; len && !buf[len - 1]; len--);
 235                 zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
 236                                  buf, len);
 237         }
 238
 239         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 240 }
 241
 242 /**
 243  * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
 244  * @tag: tag indicating which kind of unsolicited status has been received
 245  * @adapter: adapter that has issued the unsolicited status buffer
 246  * @status_buffer: buffer containing payload of unsolicited status
 247  */
 248 void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 249                                   struct fsf_status_read_buffer *status_buffer)
 250 {
 251         struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 252         unsigned long flags;
 253
 254         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 255         memset(rec, 0, sizeof(*rec));
 256         strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 257         strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 258
 259         rec->u.status.failed = atomic_read(&adapter->stat_miss);
 260         if (status_buffer != NULL) {
 261                 rec->u.status.status_type = status_buffer->status_type;
 262                 rec->u.status.status_subtype = status_buffer->status_subtype;
 263                 memcpy(&rec->u.status.queue_designator,
 264                        &status_buffer->queue_designator,
 265                        sizeof(struct fsf_queue_designator));
 266
 267                 switch (status_buffer->status_type) {
 268                 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 269                         rec->u.status.payload_size =
 270                             ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 271                         break;
 272
 273                 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 274                         rec->u.status.payload_size =
 275                             ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 276                         break;
 277
 278                 case FSF_STATUS_READ_LINK_DOWN:
 279                         switch (status_buffer->status_subtype) {
 280                         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 281                         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 282                                 rec->u.status.payload_size =
 283                                         sizeof(struct fsf_link_down_info);
 284                         }
 285                         break;
 286
 287                 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 288                         rec->u.status.payload_size =
 289                             ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 290                         break;
 291                 }
 292                 memcpy(&rec->u.status.payload,
 293                        &status_buffer->payload, rec->u.status.payload_size);
 294         }
 295
 296         debug_event(adapter->hba_dbf, 2, rec, sizeof(*rec));
 297         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 298 }
 299
 300 /**
 301  * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
 302  * @adapter: adapter affected by this QDIO related event
 303  * @qdio_error: as passed by qdio module
 304  * @sbal_index: first buffer with error condition, as passed by qdio module
 305  * @sbal_count: number of buffers affected, as passed by qdio module
 306  */
 307 void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
 308                              unsigned int qdio_error, int sbal_index,
 309                              int sbal_count)
 310 {
 311         struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
 312         unsigned long flags;
 313
 314         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 315         memset(r, 0, sizeof(*r));
 316         strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 317         r->u.qdio.qdio_error = qdio_error;
 318         r->u.qdio.sbal_index = sbal_index;
 319         r->u.qdio.sbal_count = sbal_count;
 320         debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
 321         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 322 }
 323
 324 /**
 325  * zfcp_hba_dbf_event_berr - trace event for bit error threshold
 326  * @adapter: adapter affected by this QDIO related event
 327  * @req: fsf request
 328  */
 329 void zfcp_hba_dbf_event_berr(struct zfcp_adapter *adapter,
 330                              struct zfcp_fsf_req *req)
 331 {
 332         struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
 333         struct fsf_status_read_buffer *sr_buf = req->data;
 334         struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 335         unsigned long flags;
 336
 337         spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
 338         memset(r, 0, sizeof(*r));
 339         strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 340         memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
 341         debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
 342         spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 343 }
 344 static void zfcp_hba_dbf_view_response(char **p,
 345                                        struct zfcp_hba_dbf_record_response *r)
 346 {
 347         struct timespec t;
 348
 349         zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 350         zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 351         zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
 352         zfcp_dbf_timestamp(r->fsf_issued, &t);
 353         zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 354         zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 355         zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
 356         zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
 357                       FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
 358         zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
 359                       FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
 360         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
 361         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
 362         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
 363         zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
 364         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 365
 366         switch (r->fsf_command) {
 367         case FSF_QTCB_FCP_CMND:
 368                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 369                         break;
 370                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
 371                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
 372                 p += sprintf(*p, "\n");
 373                 break;
 374
 375         case FSF_QTCB_OPEN_PORT_WITH_DID:
 376         case FSF_QTCB_CLOSE_PORT:
 377         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 378                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
 379                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
 380                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 381                 break;
 382
 383         case FSF_QTCB_OPEN_LUN:
 384         case FSF_QTCB_CLOSE_LUN:
 385                 zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
 386                 zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
 387                 zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
 388                 zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 389                 break;
 390
 391         case FSF_QTCB_SEND_ELS:
 392                 zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
 393                 zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
 394                 break;
 395
 396         case FSF_QTCB_ABORT_FCP_CMND:
 397         case FSF_QTCB_SEND_GENERIC:
 398         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 399         case FSF_QTCB_EXCHANGE_PORT_DATA:
 400         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 401         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 402                 break;
 403         }
 404 }
 405
 406 static void zfcp_hba_dbf_view_status(char **p,
 407                                      struct zfcp_hba_dbf_record_status *r)
 408 {
 409         zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 410         zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
 411         zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
 412         zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
 413                       sizeof(struct fsf_queue_designator), 0,
 414                       sizeof(struct fsf_queue_designator));
 415         zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
 416                       r->payload_size);
 417 }
 418
 419 static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
 420 {
 421         zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 422         zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 423         zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 424 }
 425
 426 static void zfcp_hba_dbf_view_berr(char **p, struct fsf_bit_error_payload *r)
 427 {
 428         zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 429         zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
 430         zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
 431         zfcp_dbf_out(p, "prim_seq_err", "%d",
 432                      r->primitive_sequence_error_count);
 433         zfcp_dbf_out(p, "inval_trans_word_err", "%d",
 434                      r->invalid_transmission_word_error_count);
 435         zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
 436         zfcp_dbf_out(p, "prim_seq_event_to", "%d",
 437                      r->primitive_sequence_event_timeout_count);
 438         zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
 439                      r->elastic_buffer_overrun_error_count);
 440         zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
 441                      r->advertised_receive_b2b_credit);
 442         zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
 443                      r->current_receive_b2b_credit);
 444         zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
 445                      r->advertised_transmit_b2b_credit);
 446         zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
 447                      r->current_transmit_b2b_credit);
 448 }
 449
 450 static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
 451                                     char *out_buf, const char *in_buf)
 452 {
 453         struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
 454         char *p = out_buf;
 455
 456         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 457                 return 0;
 458
 459         zfcp_dbf_tag(&p, "tag", r->tag);
 460         if (isalpha(r->tag2[0]))
 461                 zfcp_dbf_tag(&p, "tag2", r->tag2);
 462
 463         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
 464                 zfcp_hba_dbf_view_response(&p, &r->u.response);
 465         else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
 466                 zfcp_hba_dbf_view_status(&p, &r->u.status);
 467         else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
 468                 zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
 469         else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
 470                 zfcp_hba_dbf_view_berr(&p, &r->u.berr);
 471
 472         if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 473                 p += sprintf(p, "\n");
 474         return p - out_buf;
 475 }
 476
 477 static struct debug_view zfcp_hba_dbf_view = {
 478         "structured",
 479         NULL,
 480         &zfcp_dbf_view_header,
 481         &zfcp_hba_dbf_view_format,
 482         NULL,
 483         NULL
 484 };
 485
 486 static const char *zfcp_rec_dbf_tags[] = {
 487         [ZFCP_REC_DBF_ID_THREAD] = "thread",
 488         [ZFCP_REC_DBF_ID_TARGET] = "target",
 489         [ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 490         [ZFCP_REC_DBF_ID_ACTION] = "action",
 491 };
 492
 493 static const char *zfcp_rec_dbf_ids[] = {
 494         [1]     = "new",
 495         [2]     = "ready",
 496         [3]     = "kill",
 497         [4]     = "down sleep",
 498         [5]     = "down wakeup",
 499         [6]     = "down sleep ecd",
 500         [7]     = "down wakeup ecd",
 501         [8]     = "down sleep epd",
 502         [9]     = "down wakeup epd",
 503         [10]    = "online",
 504         [11]    = "operational",
 505         [12]    = "scsi slave destroy",
 506         [13]    = "propagate failed adapter",
 507         [14]    = "propagate failed port",
 508         [15]    = "block adapter",
 509         [16]    = "unblock adapter",
 510         [17]    = "block port",
 511         [18]    = "unblock port",
 512         [19]    = "block unit",
 513         [20]    = "unblock unit",
 514         [21]    = "unit recovery failed",
 515         [22]    = "port recovery failed",
 516         [23]    = "adapter recovery failed",
 517         [24]    = "qdio queues down",
 518         [25]    = "p2p failed",
 519         [26]    = "nameserver lookup failed",
 520         [27]    = "nameserver port failed",
 521         [28]    = "link up",
 522         [29]    = "link down",
 523         [30]    = "link up status read",
 524         [31]    = "open port failed",
 525         [32]    = "",
 526         [33]    = "close port",
 527         [34]    = "open unit failed",
 528         [35]    = "exclusive open unit failed",
 529         [36]    = "shared open unit failed",
 530         [37]    = "link down",
 531         [38]    = "link down status read no link",
 532         [39]    = "link down status read fdisc login",
 533         [40]    = "link down status read firmware update",
 534         [41]    = "link down status read unknown reason",
 535         [42]    = "link down ecd incomplete",
 536         [43]    = "link down epd incomplete",
 537         [44]    = "sysfs adapter recovery",
 538         [45]    = "sysfs port recovery",
 539         [46]    = "sysfs unit recovery",
 540         [47]    = "port boxed abort",
 541         [48]    = "unit boxed abort",
 542         [49]    = "port boxed ct",
 543         [50]    = "port boxed close physical",
 544         [51]    = "port boxed open unit",
 545         [52]    = "port boxed close unit",
 546         [53]    = "port boxed fcp",
 547         [54]    = "unit boxed fcp",
 548         [55]    = "port access denied",
 549         [56]    = "",
 550         [57]    = "",
 551         [58]    = "",
 552         [59]    = "unit access denied",
 553         [60]    = "shared unit access denied open unit",
 554         [61]    = "",
 555         [62]    = "request timeout",
 556         [63]    = "adisc link test reject or timeout",
 557         [64]    = "adisc link test d_id changed",
 558         [65]    = "adisc link test failed",
 559         [66]    = "recovery out of memory",
 560         [67]    = "adapter recovery repeated after state change",
 561         [68]    = "port recovery repeated after state change",
 562         [69]    = "unit recovery repeated after state change",
 563         [70]    = "port recovery follow-up after successful adapter recovery",
 564         [71]    = "adapter recovery escalation after failed adapter recovery",
 565         [72]    = "port recovery follow-up after successful physical port "
 566                   "recovery",
 567         [73]    = "adapter recovery escalation after failed physical port "
 568                   "recovery",
 569         [74]    = "unit recovery follow-up after successful port recovery",
 570         [75]    = "physical port recovery escalation after failed port "
 571                   "recovery",
 572         [76]    = "port recovery escalation after failed unit recovery",
 573         [77]    = "",
 574         [78]    = "duplicate request id",
 575         [79]    = "link down",
 576         [80]    = "exclusive read-only unit access unsupported",
 577         [81]    = "shared read-write unit access unsupported",
 578         [82]    = "incoming rscn",
 579         [83]    = "incoming wwpn",
 580         [84]    = "wka port handle not valid close port",
 581         [85]    = "online",
 582         [86]    = "offline",
 583         [87]    = "ccw device gone",
 584         [88]    = "ccw device no path",
 585         [89]    = "ccw device operational",
 586         [90]    = "ccw device shutdown",
 587         [91]    = "sysfs port addition",
 588         [92]    = "sysfs port removal",
 589         [93]    = "sysfs adapter recovery",
 590         [94]    = "sysfs unit addition",
 591         [95]    = "sysfs unit removal",
 592         [96]    = "sysfs port recovery",
 593         [97]    = "sysfs unit recovery",
 594         [98]    = "sequence number mismatch",
 595         [99]    = "link up",
 596         [100]   = "error state",
 597         [101]   = "status read physical port closed",
 598         [102]   = "link up status read",
 599         [103]   = "too many failed status read buffers",
 600         [104]   = "port handle not valid abort",
 601         [105]   = "lun handle not valid abort",
 602         [106]   = "port handle not valid ct",
 603         [107]   = "port handle not valid close port",
 604         [108]   = "port handle not valid close physical port",
 605         [109]   = "port handle not valid open unit",
 606         [110]   = "port handle not valid close unit",
 607         [111]   = "lun handle not valid close unit",
 608         [112]   = "port handle not valid fcp",
 609         [113]   = "lun handle not valid fcp",
 610         [114]   = "handle mismatch fcp",
 611         [115]   = "lun not valid fcp",
 612         [116]   = "qdio send failed",
 613         [117]   = "version mismatch",
 614         [118]   = "incompatible qtcb type",
 615         [119]   = "unknown protocol status",
 616         [120]   = "unknown fsf command",
 617         [121]   = "no recommendation for status qualifier",
 618         [122]   = "status read physical port closed in error",
 619         [123]   = "fc service class not supported",
 620         [124]   = "",
 621         [125]   = "need newer zfcp",
 622         [126]   = "need newer microcode",
 623         [127]   = "arbitrated loop not supported",
 624         [128]   = "",
 625         [129]   = "qtcb size mismatch",
 626         [130]   = "unknown fsf status ecd",
 627         [131]   = "fcp request too big",
 628         [132]   = "",
 629         [133]   = "data direction not valid fcp",
 630         [134]   = "command length not valid fcp",
 631         [135]   = "status read act update",
 632         [136]   = "status read cfdc update",
 633         [137]   = "hbaapi port open",
 634         [138]   = "hbaapi unit open",
 635         [139]   = "hbaapi unit shutdown",
 636         [140]   = "qdio error outbound",
 637         [141]   = "scsi host reset",
 638         [142]   = "dismissing fsf request for recovery action",
 639         [143]   = "recovery action timed out",
 640         [144]   = "recovery action gone",
 641         [145]   = "recovery action being processed",
 642         [146]   = "recovery action ready for next step",
 643         [147]   = "qdio error inbound",
 644         [148]   = "nameserver needed for port scan",
 645         [149]   = "port scan",
 646         [150]   = "ptp attach",
 647         [151]   = "port validation failed",
 648 };
 649
 650 static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
 651                                     char *buf, const char *_rec)
 652 {
 653         struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
 654         char *p = buf;
 655
 656         zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
 657         zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
 658         zfcp_dbf_out(&p, "id", "%d", r->id2);
 659         switch (r->id) {
 660         case ZFCP_REC_DBF_ID_THREAD:
 661                 zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
 662                 zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
 663                 zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
 664                 break;
 665         case ZFCP_REC_DBF_ID_TARGET:
 666                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
 667                 zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
 668                 zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
 669                 zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
 670                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
 671                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
 672                 break;
 673         case ZFCP_REC_DBF_ID_TRIGGER:
 674                 zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
 675                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
 676                 zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
 677                 zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
 678                 zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
 679                 zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
 680                 zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
 681                 zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
 682                 zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
 683                 break;
 684         case ZFCP_REC_DBF_ID_ACTION:
 685                 zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
 686                 zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
 687                 zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
 688                 zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
 689                 break;
 690         }
 691         p += sprintf(p, "\n");
 692         return p - buf;
 693 }
 694
 695 static struct debug_view zfcp_rec_dbf_view = {
 696         "structured",
 697         NULL,
 698         &zfcp_dbf_view_header,
 699         &zfcp_rec_dbf_view_format,
 700         NULL,
 701         NULL
 702 };
 703
 704 /**
 705  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 706  * @id2: identifier for event
 707  * @adapter: adapter
 708  * This function assumes that the caller is holding erp_lock.
 709  */
 710 void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter)
 711 {
 712         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 713         unsigned long flags = 0;
 714         struct list_head *entry;
 715         unsigned ready = 0, running = 0, total;
 716
 717         list_for_each(entry, &adapter->erp_ready_head)
 718                 ready++;
 719         list_for_each(entry, &adapter->erp_running_head)
 720                 running++;
 721         total = adapter->erp_total_count;
 722
 723         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 724         memset(r, 0, sizeof(*r));
 725         r->id = ZFCP_REC_DBF_ID_THREAD;
 726         r->id2 = id2;
 727         r->u.thread.total = total;
 728         r->u.thread.ready = ready;
 729         r->u.thread.running = running;
 730         debug_event(adapter->rec_dbf, 6, r, sizeof(*r));
 731         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 732 }
 733
 734 /**
 735  * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
 736  * @id2: identifier for event
 737  * @adapter: adapter
 738  * This function assumes that the caller does not hold erp_lock.
 739  */
 740 void zfcp_rec_dbf_event_thread_lock(u8 id2, struct zfcp_adapter *adapter)
 741 {
 742         unsigned long flags;
 743
 744         read_lock_irqsave(&adapter->erp_lock, flags);
 745         zfcp_rec_dbf_event_thread(id2, adapter);
 746         read_unlock_irqrestore(&adapter->erp_lock, flags);
 747 }
 748
 749 static void zfcp_rec_dbf_event_target(u8 id2, void *ref,
 750                                       struct zfcp_adapter *adapter,
 751                                       atomic_t *status, atomic_t *erp_count,
 752                                       u64 wwpn, u32 d_id, u64 fcp_lun)
 753 {
 754         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 755         unsigned long flags;
 756
 757         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 758         memset(r, 0, sizeof(*r));
 759         r->id = ZFCP_REC_DBF_ID_TARGET;
 760         r->id2 = id2;
 761         r->u.target.ref = (unsigned long)ref;
 762         r->u.target.status = atomic_read(status);
 763         r->u.target.wwpn = wwpn;
 764         r->u.target.d_id = d_id;
 765         r->u.target.fcp_lun = fcp_lun;
 766         r->u.target.erp_count = atomic_read(erp_count);
 767         debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
 768         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 769 }
 770
 771 /**
 772  * zfcp_rec_dbf_event_adapter - trace event for adapter state change
 773  * @id: identifier for trigger of state change
 774  * @ref: additional reference (e.g. request)
 775  * @adapter: adapter
 776  */
 777 void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *adapter)
 778 {
 779         zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
 780                                   &adapter->erp_counter, 0, 0, 0);
 781 }
 782
 783 /**
 784  * zfcp_rec_dbf_event_port - trace event for port state change
 785  * @id: identifier for trigger of state change
 786  * @ref: additional reference (e.g. request)
 787  * @port: port
 788  */
 789 void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port)
 790 {
 791         struct zfcp_adapter *adapter = port->adapter;
 792
 793         zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
 794                                   &port->erp_counter, port->wwpn, port->d_id,
 795                                   0);
 796 }
 797
 798 /**
 799  * zfcp_rec_dbf_event_unit - trace event for unit state change
 800  * @id: identifier for trigger of state change
 801  * @ref: additional reference (e.g. request)
 802  * @unit: unit
 803  */
 804 void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit)
 805 {
 806         struct zfcp_port *port = unit->port;
 807         struct zfcp_adapter *adapter = port->adapter;
 808
 809         zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
 810                                   &unit->erp_counter, port->wwpn, port->d_id,
 811                                   unit->fcp_lun);
 812 }
 813
 814 /**
 815  * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
 816  * @id2: identifier for error recovery trigger
 817  * @ref: additional reference (e.g. request)
 818  * @want: originally requested error recovery action
 819  * @need: error recovery action actually initiated
 820  * @action: address of error recovery action struct
 821  * @adapter: adapter
 822  * @port: port
 823  * @unit: unit
 824  */
 825 void zfcp_rec_dbf_event_trigger(u8 id2, void *ref, u8 want, u8 need,
 826                                 void *action, struct zfcp_adapter *adapter,
 827                                 struct zfcp_port *port, struct zfcp_unit *unit)
 828 {
 829         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 830         unsigned long flags;
 831
 832         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 833         memset(r, 0, sizeof(*r));
 834         r->id = ZFCP_REC_DBF_ID_TRIGGER;
 835         r->id2 = id2;
 836         r->u.trigger.ref = (unsigned long)ref;
 837         r->u.trigger.want = want;
 838         r->u.trigger.need = need;
 839         r->u.trigger.action = (unsigned long)action;
 840         r->u.trigger.as = atomic_read(&adapter->status);
 841         if (port) {
 842                 r->u.trigger.ps = atomic_read(&port->status);
 843                 r->u.trigger.wwpn = port->wwpn;
 844         }
 845         if (unit) {
 846                 r->u.trigger.us = atomic_read(&unit->status);
 847                 r->u.trigger.fcp_lun = unit->fcp_lun;
 848         }
 849         debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
 850         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 851 }
 852
 853 /**
 854  * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
 855  * @id2: identifier
 856  * @erp_action: error recovery action struct pointer
 857  */
 858 void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
 859 {
 860         struct zfcp_adapter *adapter = erp_action->adapter;
 861         struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 862         unsigned long flags;
 863
 864         spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
 865         memset(r, 0, sizeof(*r));
 866         r->id = ZFCP_REC_DBF_ID_ACTION;
 867         r->id2 = id2;
 868         r->u.action.action = (unsigned long)erp_action;
 869         r->u.action.status = erp_action->status;
 870         r->u.action.step = erp_action->step;
 871         r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
 872         debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
 873         spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 874 }
 875
 876 /**
 877  * zfcp_san_dbf_event_ct_request - trace event for issued CT request
 878  * @fsf_req: request containing issued CT data
 879  */
 880 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 881 {
 882         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 883         struct zfcp_wka_port *wka_port = ct->wka_port;
 884         struct zfcp_adapter *adapter = wka_port->adapter;
 885         struct ct_hdr *hdr = sg_virt(ct->req);
 886         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
 887         struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
 888         int level = 3;
 889         unsigned long flags;
 890
 891         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 892         memset(r, 0, sizeof(*r));
 893         strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 894         r->fsf_reqid = (unsigned long)fsf_req;
 895         r->fsf_seqno = fsf_req->seq_no;
 896         r->s_id = fc_host_port_id(adapter->scsi_host);
 897         r->d_id = wka_port->d_id;
 898         oct->cmd_req_code = hdr->cmd_rsp_code;
 899         oct->revision = hdr->revision;
 900         oct->gs_type = hdr->gs_type;
 901         oct->gs_subtype = hdr->gs_subtype;
 902         oct->options = hdr->options;
 903         oct->max_res_size = hdr->max_res_size;
 904         oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 905                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 906         debug_event(adapter->san_dbf, level, r, sizeof(*r));
 907         zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
 908                          (void *)hdr + sizeof(struct ct_hdr), oct->len);
 909         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 910 }
 911
 912 /**
 913  * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
 914  * @fsf_req: request containing CT response
 915  */
 916 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 917 {
 918         struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 919         struct zfcp_wka_port *wka_port = ct->wka_port;
 920         struct zfcp_adapter *adapter = wka_port->adapter;
 921         struct ct_hdr *hdr = sg_virt(ct->resp);
 922         struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
 923         struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
 924         int level = 3;
 925         unsigned long flags;
 926
 927         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 928         memset(r, 0, sizeof(*r));
 929         strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 930         r->fsf_reqid = (unsigned long)fsf_req;
 931         r->fsf_seqno = fsf_req->seq_no;
 932         r->s_id = wka_port->d_id;
 933         r->d_id = fc_host_port_id(adapter->scsi_host);
 934         rct->cmd_rsp_code = hdr->cmd_rsp_code;
 935         rct->revision = hdr->revision;
 936         rct->reason_code = hdr->reason_code;
 937         rct->expl = hdr->reason_code_expl;
 938         rct->vendor_unique = hdr->vendor_unique;
 939         rct->max_res_size = hdr->max_res_size;
 940         rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 941                        ZFCP_DBF_SAN_MAX_PAYLOAD);
 942         debug_event(adapter->san_dbf, level, r, sizeof(*r));
 943         zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
 944                          (void *)hdr + sizeof(struct ct_hdr), rct->len);
 945         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 946 }
 947
 948 static void zfcp_san_dbf_event_els(const char *tag, int level,
 949                                    struct zfcp_fsf_req *fsf_req, u32 s_id,
 950                                    u32 d_id, u8 ls_code, void *buffer,
 951                                    int buflen)
 952 {
 953         struct zfcp_adapter *adapter = fsf_req->adapter;
 954         struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
 955         unsigned long flags;
 956
 957         spin_lock_irqsave(&adapter->san_dbf_lock, flags);
 958         memset(rec, 0, sizeof(*rec));
 959         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 960         rec->fsf_reqid = (unsigned long)fsf_req;
 961         rec->fsf_seqno = fsf_req->seq_no;
 962         rec->s_id = s_id;
 963         rec->d_id = d_id;
 964         rec->u.els.ls_code = ls_code;
 965         debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
 966         zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
 967                          buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
 968         spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 969 }
 970
 971 /**
 972  * zfcp_san_dbf_event_els_request - trace event for issued ELS
 973  * @fsf_req: request containing issued ELS
 974  */
 975 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 976 {
 977         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 978
 979         zfcp_san_dbf_event_els("oels", 2, fsf_req,
 980                                fc_host_port_id(els->adapter->scsi_host),
 981                                els->d_id, *(u8 *) sg_virt(els->req),
 982                                sg_virt(els->req), els->req->length);
 983 }
 984
 985 /**
 986  * zfcp_san_dbf_event_els_response - trace event for completed ELS
 987  * @fsf_req: request containing ELS response
 988  */
 989 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 990 {
 991         struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 992
 993         zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
 994                                fc_host_port_id(els->adapter->scsi_host),
 995                                *(u8 *)sg_virt(els->req), sg_virt(els->resp),
 996                                els->resp->length);
 997 }
 998
 999 /**
1000  * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
1001  * @fsf_req: request containing unsolicited status buffer with incoming ELS
1002  */
1003 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
1004 {
1005         struct zfcp_adapter *adapter = fsf_req->adapter;
1006         struct fsf_status_read_buffer *buf =
1007                         (struct fsf_status_read_buffer *)fsf_req->data;
1008         int length = (int)buf->length -
1009                      (int)((void *)&buf->payload - (void *)buf);
1010
1011         zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
1012                                fc_host_port_id(adapter->scsi_host),
1013                                buf->payload.data[0], (void *)buf->payload.data,
1014                                length);
1015 }
1016
1017 static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
1018                                     char *out_buf, const char *in_buf)
1019 {
1020         struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
1021         char *p = out_buf;
1022
1023         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1024                 return 0;
1025
1026         zfcp_dbf_tag(&p, "tag", r->tag);
1027         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1028         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1029         zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
1030         zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
1031
1032         if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
1033                 struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
1034                 zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
1035                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1036                 zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
1037                 zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
1038                 zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
1039                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
1040         } else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
1041                 struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
1042                 zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
1043                 zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
1044                 zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
1045                 zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
1046                 zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
1047                 zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
1048         } else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
1049                    strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
1050                    strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
1051                 struct zfcp_san_dbf_record_els *els = &r->u.els;
1052                 zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
1053         }
1054         return p - out_buf;
1055 }
1056
1057 static struct debug_view zfcp_san_dbf_view = {
1058         "structured",
1059         NULL,
1060         &zfcp_dbf_view_header,
1061         &zfcp_san_dbf_view_format,
1062         NULL,
1063         NULL
1064 };
1065
1066 static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
1067                                 struct zfcp_adapter *adapter,
1068                                 struct scsi_cmnd *scsi_cmnd,
1069                                 struct zfcp_fsf_req *fsf_req,
1070                                 unsigned long old_req_id)
1071 {
1072         struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
1073         struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
1074         unsigned long flags;
1075         struct fcp_rsp_iu *fcp_rsp;
1076         char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
1077         int offset = 0, buflen = 0;
1078
1079         spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
1080         do {
1081                 memset(rec, 0, sizeof(*rec));
1082                 if (offset == 0) {
1083                         strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
1084                         strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
1085                         if (scsi_cmnd != NULL) {
1086                                 if (scsi_cmnd->device) {
1087                                         rec->scsi_id = scsi_cmnd->device->id;
1088                                         rec->scsi_lun = scsi_cmnd->device->lun;
1089                                 }
1090                                 rec->scsi_result = scsi_cmnd->result;
1091                                 rec->scsi_cmnd = (unsigned long)scsi_cmnd;
1092                                 rec->scsi_serial = scsi_cmnd->serial_number;
1093                                 memcpy(rec->scsi_opcode, scsi_cmnd->cmnd,
1094                                         min((int)scsi_cmnd->cmd_len,
1095                                                 ZFCP_DBF_SCSI_OPCODE));
1096                                 rec->scsi_retries = scsi_cmnd->retries;
1097                                 rec->scsi_allowed = scsi_cmnd->allowed;
1098                         }
1099                         if (fsf_req != NULL) {
1100                                 fcp_rsp = (struct fcp_rsp_iu *)
1101                                     &(fsf_req->qtcb->bottom.io.fcp_rsp);
1102                                 fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
1103                                 fcp_sns_info =
1104                                     zfcp_get_fcp_sns_info_ptr(fcp_rsp);
1105
1106                                 rec->rsp_validity = fcp_rsp->validity.value;
1107                                 rec->rsp_scsi_status = fcp_rsp->scsi_status;
1108                                 rec->rsp_resid = fcp_rsp->fcp_resid;
1109                                 if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
1110                                         rec->rsp_code = *(fcp_rsp_info + 3);
1111                                 if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
1112                                         buflen = min((int)fcp_rsp->fcp_sns_len,
1113                                                      ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
1114                                         rec->sns_info_len = buflen;
1115                                         memcpy(rec->sns_info, fcp_sns_info,
1116                                                min(buflen,
1117                                                    ZFCP_DBF_SCSI_FCP_SNS_INFO));
1118                                         offset += min(buflen,
1119                                                       ZFCP_DBF_SCSI_FCP_SNS_INFO);
1120                                 }
1121
1122                                 rec->fsf_reqid = (unsigned long)fsf_req;
1123                                 rec->fsf_seqno = fsf_req->seq_no;
1124                                 rec->fsf_issued = fsf_req->issued;
1125                         }
1126                         rec->old_fsf_reqid = old_req_id;
1127                 } else {
1128                         strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
1129                         dump->total_size = buflen;
1130                         dump->offset = offset;
1131                         dump->size = min(buflen - offset,
1132                                          (int)sizeof(struct
1133                                                      zfcp_scsi_dbf_record) -
1134                                          (int)sizeof(struct zfcp_dbf_dump));
1135                         memcpy(dump->data, fcp_sns_info + offset, dump->size);
1136                         offset += dump->size;
1137                 }
1138                 debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
1139         } while (offset < buflen);
1140         spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
1141 }
1142
1143 /**
1144  * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
1145  * @tag: tag indicating success or failure of SCSI command
1146  * @level: trace level applicable for this event
1147  * @adapter: adapter that has been used to issue the SCSI command
1148  * @scsi_cmnd: SCSI command pointer
1149  * @fsf_req: request used to issue SCSI command (might be NULL)
1150  */
1151 void zfcp_scsi_dbf_event_result(const char *tag, int level,
1152                                 struct zfcp_adapter *adapter,
1153                                 struct scsi_cmnd *scsi_cmnd,
1154                                 struct zfcp_fsf_req *fsf_req)
1155 {
1156         zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
1157 }
1158
1159 /**
1160  * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
1161  * @tag: tag indicating success or failure of abort operation
1162  * @adapter: adapter thas has been used to issue SCSI command to be aborted
1163  * @scsi_cmnd: SCSI command to be aborted
1164  * @new_fsf_req: request containing abort (might be NULL)
1165  * @old_req_id: identifier of request containg SCSI command to be aborted
1166  */
1167 void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
1168                                struct scsi_cmnd *scsi_cmnd,
1169                                struct zfcp_fsf_req *new_fsf_req,
1170                                unsigned long old_req_id)
1171 {
1172         zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
1173                             old_req_id);
1174 }
1175
1176 /**
1177  * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
1178  * @tag: tag indicating success or failure of reset operation
1179  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
1180  * @unit: unit that needs reset
1181  * @scsi_cmnd: SCSI command which caused this error recovery
1182  */
1183 void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
1184                                   struct zfcp_unit *unit,
1185                                   struct scsi_cmnd *scsi_cmnd)
1186 {
1187         zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
1188                             unit->port->adapter, scsi_cmnd, NULL, 0);
1189 }
1190
1191 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
1192                                      char *out_buf, const char *in_buf)
1193 {
1194         struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
1195         struct timespec t;
1196         char *p = out_buf;
1197
1198         if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
1199                 return 0;
1200
1201         zfcp_dbf_tag(&p, "tag", r->tag);
1202         zfcp_dbf_tag(&p, "tag2", r->tag2);
1203         zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
1204         zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
1205         zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
1206         zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
1207         zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
1208         zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
1209                       0, ZFCP_DBF_SCSI_OPCODE);
1210         zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
1211         zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
1212         if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
1213                 zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
1214         zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
1215         zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
1216         zfcp_dbf_timestamp(r->fsf_issued, &t);
1217         zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
1218
1219         if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
1220                 zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
1221                 zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
1222                              r->rsp_scsi_status);
1223                 zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
1224                 zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
1225                 zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
1226                 zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
1227                               min((int)r->sns_info_len,
1228                               ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
1229                               r->sns_info_len);
1230         }
1231         p += sprintf(p, "\n");
1232         return p - out_buf;
1233 }
1234
1235 static struct debug_view zfcp_scsi_dbf_view = {
1236         "structured",
1237         NULL,
1238         &zfcp_dbf_view_header,
1239         &zfcp_scsi_dbf_view_format,
1240         NULL,
1241         NULL
1242 };
1243
1244 /**
1245  * zfcp_adapter_debug_register - registers debug feature for an adapter
1246  * @adapter: pointer to adapter for which debug features should be registered
1247  * return: -ENOMEM on error, 0 otherwise
1248  */
1249 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
1250 {
1251         char dbf_name[DEBUG_MAX_NAME_LEN];
1252
1253         /* debug feature area which records recovery activity */
1254         sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
1255         adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
1256                                           sizeof(struct zfcp_rec_dbf_record));
1257         if (!adapter->rec_dbf)
1258                 goto failed;
1259         debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
1260         debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
1261         debug_set_level(adapter->rec_dbf, 3);
1262
1263         /* debug feature area which records HBA (FSF and QDIO) conditions */
1264         sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
1265         adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
1266                                           sizeof(struct zfcp_hba_dbf_record));
1267         if (!adapter->hba_dbf)
1268                 goto failed;
1269         debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
1270         debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
1271         debug_set_level(adapter->hba_dbf, 3);
1272
1273         /* debug feature area which records SAN command failures and recovery */
1274         sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
1275         adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
1276                                           sizeof(struct zfcp_san_dbf_record));
1277         if (!adapter->san_dbf)
1278                 goto failed;
1279         debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
1280         debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
1281         debug_set_level(adapter->san_dbf, 6);
1282
1283         /* debug feature area which records SCSI command failures and recovery */
1284         sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
1285         adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
1286                                            sizeof(struct zfcp_scsi_dbf_record));
1287         if (!adapter->scsi_dbf)
1288                 goto failed;
1289         debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
1290         debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
1291         debug_set_level(adapter->scsi_dbf, 3);
1292
1293         return 0;
1294
1295  failed:
1296         zfcp_adapter_debug_unregister(adapter);
1297
1298         return -ENOMEM;
1299 }
1300
1301 /**
1302  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
1303  * @adapter: pointer to adapter for which debug features should be unregistered
1304  */
1305 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
1306 {
1307         debug_unregister(adapter->scsi_dbf);
1308         debug_unregister(adapter->san_dbf);
1309         debug_unregister(adapter->hba_dbf);
1310         debug_unregister(adapter->rec_dbf);
1311         adapter->scsi_dbf = NULL;
1312         adapter->san_dbf = NULL;
1313         adapter->hba_dbf = NULL;
1314         adapter->rec_dbf = NULL;
1315 }