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