drivers/s390/scsi/zfcp_scsi.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Interface to Linux SCSI midlayer.
   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 <asm/atomic.h>
  13 #include "zfcp_ext.h"
  14 #include "zfcp_dbf.h"
  15
  16 static unsigned int default_depth = 32;
  17 module_param_named(queue_depth, default_depth, uint, 0600);
  18 MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
  19
  20 /* Find start of Sense Information in FCP response unit*/
  21 char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
  22 {
  23         char *fcp_sns_info_ptr;
  24
  25         fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1];
  26         if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)
  27                 fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len;
  28
  29         return fcp_sns_info_ptr;
  30 }
  31
  32 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
  33                                         int reason)
  34 {
  35         switch (reason) {
  36         case SCSI_QDEPTH_DEFAULT:
  37                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
  38                 break;
  39         case SCSI_QDEPTH_QFULL:
  40                 scsi_track_queue_full(sdev, depth);
  41                 break;
  42         case SCSI_QDEPTH_RAMP_UP:
  43                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
  44                 break;
  45         default:
  46                 return -EOPNOTSUPP;
  47         }
  48         return sdev->queue_depth;
  49 }
  50
  51 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
  52 {
  53         struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
  54         unit->device = NULL;
  55         zfcp_unit_put(unit);
  56 }
  57
  58 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
  59 {
  60         if (sdp->tagged_supported)
  61                 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
  62         else
  63                 scsi_adjust_queue_depth(sdp, 0, 1);
  64         return 0;
  65 }
  66
  67 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
  68 {
  69         struct zfcp_adapter *adapter =
  70                 (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
  71         set_host_byte(scpnt, result);
  72         if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
  73                 zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
  74         /* return directly */
  75         scpnt->scsi_done(scpnt);
  76 }
  77
  78 static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
  79                                   void (*done) (struct scsi_cmnd *))
  80 {
  81         struct zfcp_unit *unit;
  82         struct zfcp_adapter *adapter;
  83         int    status, scsi_result, ret;
  84         struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
  85
  86         /* reset the status for this request */
  87         scpnt->result = 0;
  88         scpnt->host_scribble = NULL;
  89         scpnt->scsi_done = done;
  90
  91         /*
  92          * figure out adapter and target device
  93          * (stored there by zfcp_scsi_slave_alloc)
  94          */
  95         adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
  96         unit = scpnt->device->hostdata;
  97
  98         BUG_ON(!adapter || (adapter != unit->port->adapter));
  99         BUG_ON(!scpnt->scsi_done);
 100
 101         if (unlikely(!unit)) {
 102                 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
 103                 return 0;
 104         }
 105
 106         scsi_result = fc_remote_port_chkready(rport);
 107         if (unlikely(scsi_result)) {
 108                 scpnt->result = scsi_result;
 109                 zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
 110                 scpnt->scsi_done(scpnt);
 111                 return 0;
 112         }
 113
 114         status = atomic_read(&unit->status);
 115         if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
 116                      !(status & ZFCP_STATUS_COMMON_RUNNING))) {
 117                 zfcp_scsi_command_fail(scpnt, DID_ERROR);
 118                 return 0;
 119         }
 120
 121         ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
 122         if (unlikely(ret == -EBUSY))
 123                 return SCSI_MLQUEUE_DEVICE_BUSY;
 124         else if (unlikely(ret < 0))
 125                 return SCSI_MLQUEUE_HOST_BUSY;
 126
 127         return ret;
 128 }
 129
 130 static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
 131                                           int channel, unsigned int id,
 132                                           unsigned int lun)
 133 {
 134         struct zfcp_port *port;
 135         struct zfcp_unit *unit;
 136         int scsi_lun;
 137
 138         list_for_each_entry(port, &adapter->port_list_head, list) {
 139                 if (!port->rport || (id != port->rport->scsi_target_id))
 140                         continue;
 141                 list_for_each_entry(unit, &port->unit_list_head, list) {
 142                         scsi_lun = scsilun_to_int(
 143                                 (struct scsi_lun *)&unit->fcp_lun);
 144                         if (lun == scsi_lun)
 145                                 return unit;
 146                 }
 147         }
 148
 149         return NULL;
 150 }
 151
 152 static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
 153 {
 154         struct zfcp_adapter *adapter;
 155         struct zfcp_unit *unit;
 156         unsigned long flags;
 157         int retval = -ENXIO;
 158
 159         adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
 160         if (!adapter)
 161                 goto out;
 162
 163         read_lock_irqsave(&zfcp_data.config_lock, flags);
 164         unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
 165         if (unit) {
 166                 sdp->hostdata = unit;
 167                 unit->device = sdp;
 168                 zfcp_unit_get(unit);
 169                 retval = 0;
 170         }
 171         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 172 out:
 173         return retval;
 174 }
 175
 176 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
 177 {
 178         struct Scsi_Host *scsi_host = scpnt->device->host;
 179         struct zfcp_adapter *adapter =
 180                 (struct zfcp_adapter *) scsi_host->hostdata[0];
 181         struct zfcp_unit *unit = scpnt->device->hostdata;
 182         struct zfcp_fsf_req *old_req, *abrt_req;
 183         unsigned long flags;
 184         unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
 185         int retval = SUCCESS;
 186         int retry = 3;
 187         char *dbf_tag;
 188
 189         /* avoid race condition between late normal completion and abort */
 190         write_lock_irqsave(&adapter->abort_lock, flags);
 191
 192         spin_lock(&adapter->req_list_lock);
 193         old_req = zfcp_reqlist_find(adapter, old_reqid);
 194         spin_unlock(&adapter->req_list_lock);
 195         if (!old_req) {
 196                 write_unlock_irqrestore(&adapter->abort_lock, flags);
 197                 zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
 198                                     old_reqid);
 199                 return FAILED; /* completion could be in progress */
 200         }
 201         old_req->data = NULL;
 202
 203         /* don't access old fsf_req after releasing the abort_lock */
 204         write_unlock_irqrestore(&adapter->abort_lock, flags);
 205
 206         while (retry--) {
 207                 abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit);
 208                 if (abrt_req)
 209                         break;
 210
 211                 zfcp_erp_wait(adapter);
 212                 if (!(atomic_read(&adapter->status) &
 213                       ZFCP_STATUS_COMMON_RUNNING)) {
 214                         zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
 215                                             old_reqid);
 216                         return SUCCESS;
 217                 }
 218         }
 219         if (!abrt_req)
 220                 return FAILED;
 221
 222         wait_for_completion(&abrt_req->completion);
 223
 224         if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
 225                 dbf_tag = "okay";
 226         else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
 227                 dbf_tag = "lte2";
 228         else {
 229                 dbf_tag = "fail";
 230                 retval = FAILED;
 231         }
 232         zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
 233         zfcp_fsf_req_free(abrt_req);
 234         return retval;
 235 }
 236
 237 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
 238 {
 239         struct zfcp_unit *unit = scpnt->device->hostdata;
 240         struct zfcp_adapter *adapter = unit->port->adapter;
 241         struct zfcp_fsf_req *fsf_req = NULL;
 242         int retval = SUCCESS;
 243         int retry = 3;
 244
 245         while (retry--) {
 246                 fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
 247                 if (fsf_req)
 248                         break;
 249
 250                 zfcp_erp_wait(adapter);
 251                 if (!(atomic_read(&adapter->status) &
 252                       ZFCP_STATUS_COMMON_RUNNING)) {
 253                         zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
 254                         return SUCCESS;
 255                 }
 256         }
 257         if (!fsf_req)
 258                 return FAILED;
 259
 260         wait_for_completion(&fsf_req->completion);
 261
 262         if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
 263                 zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
 264                 retval = FAILED;
 265         } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
 266                 zfcp_dbf_scsi_devreset("nsup", tm_flags, unit, scpnt);
 267                 retval = FAILED;
 268         } else
 269                 zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
 270
 271         zfcp_fsf_req_free(fsf_req);
 272         return retval;
 273 }
 274
 275 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
 276 {
 277         return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET);
 278 }
 279
 280 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
 281 {
 282         return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET);
 283 }
 284
 285 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
 286 {
 287         struct zfcp_unit *unit = scpnt->device->hostdata;
 288         struct zfcp_adapter *adapter = unit->port->adapter;
 289
 290         zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
 291         zfcp_erp_wait(adapter);
 292
 293         return SUCCESS;
 294 }
 295
 296 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
 297 {
 298         struct ccw_dev_id dev_id;
 299
 300         if (adapter->scsi_host)
 301                 return 0;
 302
 303         ccw_device_get_id(adapter->ccw_device, &dev_id);
 304         /* register adapter as SCSI host with mid layer of SCSI stack */
 305         adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
 306                                              sizeof (struct zfcp_adapter *));
 307         if (!adapter->scsi_host) {
 308                 dev_err(&adapter->ccw_device->dev,
 309                         "Registering the FCP device with the "
 310                         "SCSI stack failed\n");
 311                 return -EIO;
 312         }
 313
 314         /* tell the SCSI stack some characteristics of this adapter */
 315         adapter->scsi_host->max_id = 1;
 316         adapter->scsi_host->max_lun = 1;
 317         adapter->scsi_host->max_channel = 0;
 318         adapter->scsi_host->unique_id = dev_id.devno;
 319         adapter->scsi_host->max_cmd_len = 255;
 320         adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
 321
 322         adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
 323
 324         if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
 325                 scsi_host_put(adapter->scsi_host);
 326                 return -EIO;
 327         }
 328
 329         return 0;
 330 }
 331
 332 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
 333 {
 334         struct Scsi_Host *shost;
 335         struct zfcp_port *port;
 336
 337         shost = adapter->scsi_host;
 338         if (!shost)
 339                 return;
 340
 341         read_lock_irq(&zfcp_data.config_lock);
 342         list_for_each_entry(port, &adapter->port_list_head, list)
 343                 if (port->rport)
 344                         port->rport = NULL;
 345
 346         read_unlock_irq(&zfcp_data.config_lock);
 347         fc_remove_host(shost);
 348         scsi_remove_host(shost);
 349         scsi_host_put(shost);
 350         adapter->scsi_host = NULL;
 351
 352         return;
 353 }
 354
 355 static struct fc_host_statistics*
 356 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
 357 {
 358         struct fc_host_statistics *fc_stats;
 359
 360         if (!adapter->fc_stats) {
 361                 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
 362                 if (!fc_stats)
 363                         return NULL;
 364                 adapter->fc_stats = fc_stats; /* freed in adater_dequeue */
 365         }
 366         memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
 367         return adapter->fc_stats;
 368 }
 369
 370 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
 371                                       struct fsf_qtcb_bottom_port *data,
 372                                       struct fsf_qtcb_bottom_port *old)
 373 {
 374         fc_stats->seconds_since_last_reset =
 375                 data->seconds_since_last_reset - old->seconds_since_last_reset;
 376         fc_stats->tx_frames = data->tx_frames - old->tx_frames;
 377         fc_stats->tx_words = data->tx_words - old->tx_words;
 378         fc_stats->rx_frames = data->rx_frames - old->rx_frames;
 379         fc_stats->rx_words = data->rx_words - old->rx_words;
 380         fc_stats->lip_count = data->lip - old->lip;
 381         fc_stats->nos_count = data->nos - old->nos;
 382         fc_stats->error_frames = data->error_frames - old->error_frames;
 383         fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
 384         fc_stats->link_failure_count = data->link_failure - old->link_failure;
 385         fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
 386         fc_stats->loss_of_signal_count =
 387                 data->loss_of_signal - old->loss_of_signal;
 388         fc_stats->prim_seq_protocol_err_count =
 389                 data->psp_error_counts - old->psp_error_counts;
 390         fc_stats->invalid_tx_word_count =
 391                 data->invalid_tx_words - old->invalid_tx_words;
 392         fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
 393         fc_stats->fcp_input_requests =
 394                 data->input_requests - old->input_requests;
 395         fc_stats->fcp_output_requests =
 396                 data->output_requests - old->output_requests;
 397         fc_stats->fcp_control_requests =
 398                 data->control_requests - old->control_requests;
 399         fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
 400         fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
 401 }
 402
 403 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
 404                                    struct fsf_qtcb_bottom_port *data)
 405 {
 406         fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
 407         fc_stats->tx_frames = data->tx_frames;
 408         fc_stats->tx_words = data->tx_words;
 409         fc_stats->rx_frames = data->rx_frames;
 410         fc_stats->rx_words = data->rx_words;
 411         fc_stats->lip_count = data->lip;
 412         fc_stats->nos_count = data->nos;
 413         fc_stats->error_frames = data->error_frames;
 414         fc_stats->dumped_frames = data->dumped_frames;
 415         fc_stats->link_failure_count = data->link_failure;
 416         fc_stats->loss_of_sync_count = data->loss_of_sync;
 417         fc_stats->loss_of_signal_count = data->loss_of_signal;
 418         fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
 419         fc_stats->invalid_tx_word_count = data->invalid_tx_words;
 420         fc_stats->invalid_crc_count = data->invalid_crcs;
 421         fc_stats->fcp_input_requests = data->input_requests;
 422         fc_stats->fcp_output_requests = data->output_requests;
 423         fc_stats->fcp_control_requests = data->control_requests;
 424         fc_stats->fcp_input_megabytes = data->input_mb;
 425         fc_stats->fcp_output_megabytes = data->output_mb;
 426 }
 427
 428 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
 429 {
 430         struct zfcp_adapter *adapter;
 431         struct fc_host_statistics *fc_stats;
 432         struct fsf_qtcb_bottom_port *data;
 433         int ret;
 434
 435         adapter = (struct zfcp_adapter *)host->hostdata[0];
 436         fc_stats = zfcp_init_fc_host_stats(adapter);
 437         if (!fc_stats)
 438                 return NULL;
 439
 440         data = kzalloc(sizeof(*data), GFP_KERNEL);
 441         if (!data)
 442                 return NULL;
 443
 444         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
 445         if (ret) {
 446                 kfree(data);
 447                 return NULL;
 448         }
 449
 450         if (adapter->stats_reset &&
 451             ((jiffies/HZ - adapter->stats_reset) <
 452              data->seconds_since_last_reset))
 453                 zfcp_adjust_fc_host_stats(fc_stats, data,
 454                                           adapter->stats_reset_data);
 455         else
 456                 zfcp_set_fc_host_stats(fc_stats, data);
 457
 458         kfree(data);
 459         return fc_stats;
 460 }
 461
 462 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
 463 {
 464         struct zfcp_adapter *adapter;
 465         struct fsf_qtcb_bottom_port *data;
 466         int ret;
 467
 468         adapter = (struct zfcp_adapter *)shost->hostdata[0];
 469         data = kzalloc(sizeof(*data), GFP_KERNEL);
 470         if (!data)
 471                 return;
 472
 473         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
 474         if (ret)
 475                 kfree(data);
 476         else {
 477                 adapter->stats_reset = jiffies/HZ;
 478                 kfree(adapter->stats_reset_data);
 479                 adapter->stats_reset_data = data; /* finally freed in
 480                                                      adapter_dequeue */
 481         }
 482 }
 483
 484 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
 485 {
 486         struct zfcp_adapter *adapter =
 487                 (struct zfcp_adapter *)shost->hostdata[0];
 488         int status = atomic_read(&adapter->status);
 489
 490         if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
 491             !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
 492                 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
 493         else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 494                 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
 495         else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
 496                 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
 497         else
 498                 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
 499 }
 500
 501 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
 502 {
 503         rport->dev_loss_tmo = timeout;
 504 }
 505
 506 /**
 507  * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
 508  * @rport: The FC rport where to teminate I/O
 509  *
 510  * Abort all pending SCSI commands for a port by closing the
 511  * port. Using a reopen for avoids a conflict with a shutdown
 512  * overwriting a reopen.
 513  */
 514 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
 515 {
 516         struct zfcp_port *port;
 517         struct Scsi_Host *shost = rport_to_shost(rport);
 518         struct zfcp_adapter *adapter =
 519                 (struct zfcp_adapter *)shost->hostdata[0];
 520
 521         write_lock_irq(&zfcp_data.config_lock);
 522         port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
 523         if (port)
 524                 zfcp_port_get(port);
 525         write_unlock_irq(&zfcp_data.config_lock);
 526
 527         if (port) {
 528                 zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
 529                 zfcp_port_put(port);
 530         }
 531 }
 532
 533 static void zfcp_scsi_rport_register(struct zfcp_port *port)
 534 {
 535         struct fc_rport_identifiers ids;
 536         struct fc_rport *rport;
 537
 538         if (port->rport)
 539                 return;
 540
 541         ids.node_name = port->wwnn;
 542         ids.port_name = port->wwpn;
 543         ids.port_id = port->d_id;
 544         ids.roles = FC_RPORT_ROLE_FCP_TARGET;
 545
 546         rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
 547         if (!rport) {
 548                 dev_err(&port->adapter->ccw_device->dev,
 549                         "Registering port 0x%016Lx failed\n",
 550                         (unsigned long long)port->wwpn);
 551                 return;
 552         }
 553
 554         rport->maxframe_size = port->maxframe_size;
 555         rport->supported_classes = port->supported_classes;
 556         port->rport = rport;
 557 }
 558
 559 static void zfcp_scsi_rport_block(struct zfcp_port *port)
 560 {
 561         struct fc_rport *rport = port->rport;
 562
 563         if (rport) {
 564                 fc_remote_port_delete(rport);
 565                 port->rport = NULL;
 566         }
 567 }
 568
 569 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
 570 {
 571         zfcp_port_get(port);
 572         port->rport_task = RPORT_ADD;
 573
 574         if (!queue_work(port->adapter->work_queue, &port->rport_work))
 575                 zfcp_port_put(port);
 576 }
 577
 578 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
 579 {
 580         zfcp_port_get(port);
 581         port->rport_task = RPORT_DEL;
 582
 583         if (port->rport && queue_work(port->adapter->work_queue,
 584                                       &port->rport_work))
 585                 return;
 586
 587         zfcp_port_put(port);
 588 }
 589
 590 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
 591 {
 592         struct zfcp_port *port;
 593
 594         list_for_each_entry(port, &adapter->port_list_head, list)
 595                 zfcp_scsi_schedule_rport_block(port);
 596 }
 597
 598 void zfcp_scsi_rport_work(struct work_struct *work)
 599 {
 600         struct zfcp_port *port = container_of(work, struct zfcp_port,
 601                                               rport_work);
 602
 603         while (port->rport_task) {
 604                 if (port->rport_task == RPORT_ADD) {
 605                         port->rport_task = RPORT_NONE;
 606                         zfcp_scsi_rport_register(port);
 607                 } else {
 608                         port->rport_task = RPORT_NONE;
 609                         zfcp_scsi_rport_block(port);
 610                 }
 611         }
 612
 613         zfcp_port_put(port);
 614 }
 615
 616
 617 void zfcp_scsi_scan(struct work_struct *work)
 618 {
 619         struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
 620                                               scsi_work);
 621         struct fc_rport *rport;
 622
 623         flush_work(&unit->port->rport_work);
 624         rport = unit->port->rport;
 625
 626         if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
 627                 scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
 628                                  scsilun_to_int((struct scsi_lun *)
 629                                                 &unit->fcp_lun), 0);
 630
 631         zfcp_unit_put(unit);
 632 }
 633
 634 static int zfcp_execute_fc_job(struct fc_bsg_job *job)
 635 {
 636         switch (job->request->msgcode) {
 637         case FC_BSG_RPT_ELS:
 638         case FC_BSG_HST_ELS_NOLOGIN:
 639                 return zfcp_fc_execute_els_fc_job(job);
 640         case FC_BSG_RPT_CT:
 641         case FC_BSG_HST_CT:
 642                 return zfcp_fc_execute_ct_fc_job(job);
 643         default:
 644                 return -EINVAL;
 645         }
 646 }
 647
 648 struct fc_function_template zfcp_transport_functions = {
 649         .show_starget_port_id = 1,
 650         .show_starget_port_name = 1,
 651         .show_starget_node_name = 1,
 652         .show_rport_supported_classes = 1,
 653         .show_rport_maxframe_size = 1,
 654         .show_rport_dev_loss_tmo = 1,
 655         .show_host_node_name = 1,
 656         .show_host_port_name = 1,
 657         .show_host_permanent_port_name = 1,
 658         .show_host_supported_classes = 1,
 659         .show_host_supported_speeds = 1,
 660         .show_host_maxframe_size = 1,
 661         .show_host_serial_number = 1,
 662         .get_fc_host_stats = zfcp_get_fc_host_stats,
 663         .reset_fc_host_stats = zfcp_reset_fc_host_stats,
 664         .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
 665         .get_host_port_state = zfcp_get_host_port_state,
 666         .terminate_rport_io = zfcp_scsi_terminate_rport_io,
 667         .show_host_port_state = 1,
 668         .bsg_request = zfcp_execute_fc_job,
 669         /* no functions registered for following dynamic attributes but
 670            directly set by LLDD */
 671         .show_host_port_type = 1,
 672         .show_host_speed = 1,
 673         .show_host_port_id = 1,
 674         .disable_target_scan = 1,
 675 };
 676
 677 struct zfcp_data zfcp_data = {
 678         .scsi_host_template = {
 679                 .name                    = "zfcp",
 680                 .module                  = THIS_MODULE,
 681                 .proc_name               = "zfcp",
 682                 .change_queue_depth      = zfcp_scsi_change_queue_depth,
 683                 .slave_alloc             = zfcp_scsi_slave_alloc,
 684                 .slave_configure         = zfcp_scsi_slave_configure,
 685                 .slave_destroy           = zfcp_scsi_slave_destroy,
 686                 .queuecommand            = zfcp_scsi_queuecommand,
 687                 .eh_abort_handler        = zfcp_scsi_eh_abort_handler,
 688                 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
 689                 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
 690                 .eh_host_reset_handler   = zfcp_scsi_eh_host_reset_handler,
 691                 .can_queue               = 4096,
 692                 .this_id                 = -1,
 693                 .sg_tablesize            = ZFCP_MAX_SBALES_PER_REQ,
 694                 .cmd_per_lun             = 1,
 695                 .use_clustering          = 1,
 696                 .sdev_attrs              = zfcp_sysfs_sdev_attrs,
 697                 .max_sectors             = (ZFCP_MAX_SBALES_PER_REQ * 8),
 698                 .shost_attrs             = zfcp_sysfs_shost_attrs,
 699         },
 700 };