drivers/s390/scsi/zfcp_scsi.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Interface to Linux SCSI midlayer.
   5  *
   6  * Copyright IBM Corporation 2002, 2010
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/types.h>
  13 #include <linux/slab.h>
  14 #include <scsi/fc/fc_fcp.h>
  15 #include <asm/atomic.h>
  16 #include "zfcp_ext.h"
  17 #include "zfcp_dbf.h"
  18 #include "zfcp_fc.h"
  19 #include "zfcp_reqlist.h"
  20
  21 static unsigned int default_depth = 32;
  22 module_param_named(queue_depth, default_depth, uint, 0600);
  23 MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
  24
  25 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
  26                                         int reason)
  27 {
  28         switch (reason) {
  29         case SCSI_QDEPTH_DEFAULT:
  30                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
  31                 break;
  32         case SCSI_QDEPTH_QFULL:
  33                 scsi_track_queue_full(sdev, depth);
  34                 break;
  35         case SCSI_QDEPTH_RAMP_UP:
  36                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
  37                 break;
  38         default:
  39                 return -EOPNOTSUPP;
  40         }
  41         return sdev->queue_depth;
  42 }
  43
  44 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
  45 {
  46         struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
  47         unit->device = NULL;
  48         put_device(&unit->dev);
  49 }
  50
  51 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
  52 {
  53         if (sdp->tagged_supported)
  54                 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
  55         else
  56                 scsi_adjust_queue_depth(sdp, 0, 1);
  57         return 0;
  58 }
  59
  60 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
  61 {
  62         struct zfcp_adapter *adapter =
  63                 (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
  64
  65         set_host_byte(scpnt, result);
  66         zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
  67         scpnt->scsi_done(scpnt);
  68 }
  69
  70 static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
  71                                   void (*done) (struct scsi_cmnd *))
  72 {
  73         struct zfcp_unit *unit;
  74         struct zfcp_adapter *adapter;
  75         int    status, scsi_result, ret;
  76         struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
  77
  78         /* reset the status for this request */
  79         scpnt->result = 0;
  80         scpnt->host_scribble = NULL;
  81         scpnt->scsi_done = done;
  82
  83         /*
  84          * figure out adapter and target device
  85          * (stored there by zfcp_scsi_slave_alloc)
  86          */
  87         adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
  88         unit = scpnt->device->hostdata;
  89
  90         scsi_result = fc_remote_port_chkready(rport);
  91         if (unlikely(scsi_result)) {
  92                 scpnt->result = scsi_result;
  93                 zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
  94                 scpnt->scsi_done(scpnt);
  95                 return 0;
  96         }
  97
  98         status = atomic_read(&unit->status);
  99         if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
 100                      !(atomic_read(&unit->port->status) &
 101                        ZFCP_STATUS_COMMON_ERP_FAILED)) {
 102                 /* only unit access denied, but port is good
 103                  * not covered by FC transport, have to fail here */
 104                 zfcp_scsi_command_fail(scpnt, DID_ERROR);
 105                 return 0;
 106         }
 107
 108         if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
 109                 /* This could be either
 110                  * open unit pending: this is temporary, will result in
 111                  *      open unit or ERP_FAILED, so retry command
 112                  * call to rport_delete pending: mimic retry from
 113                  *      fc_remote_port_chkready until rport is BLOCKED
 114                  */
 115                 zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
 116                 return 0;
 117         }
 118
 119         ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
 120         if (unlikely(ret == -EBUSY))
 121                 return SCSI_MLQUEUE_DEVICE_BUSY;
 122         else if (unlikely(ret < 0))
 123                 return SCSI_MLQUEUE_HOST_BUSY;
 124
 125         return ret;
 126 }
 127
 128 static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
 129                                           unsigned int id, u64 lun)
 130 {
 131         unsigned long flags;
 132         struct zfcp_port *port;
 133         struct zfcp_unit *unit = NULL;
 134
 135         read_lock_irqsave(&adapter->port_list_lock, flags);
 136         list_for_each_entry(port, &adapter->port_list, list) {
 137                 if (!port->rport || (id != port->rport->scsi_target_id))
 138                         continue;
 139                 unit = zfcp_get_unit_by_lun(port, lun);
 140                 if (unit)
 141                         break;
 142         }
 143         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 144
 145         return unit;
 146 }
 147
 148 static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
 149 {
 150         struct zfcp_adapter *adapter;
 151         struct zfcp_unit *unit;
 152         u64 lun;
 153
 154         adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
 155         if (!adapter)
 156                 goto out;
 157
 158         int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun);
 159         unit = zfcp_unit_lookup(adapter, sdp->id, lun);
 160         if (unit) {
 161                 sdp->hostdata = unit;
 162                 unit->device = sdp;
 163                 return 0;
 164         }
 165 out:
 166         return -ENXIO;
 167 }
 168
 169 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
 170 {
 171         struct Scsi_Host *scsi_host = scpnt->device->host;
 172         struct zfcp_adapter *adapter =
 173                 (struct zfcp_adapter *) scsi_host->hostdata[0];
 174         struct zfcp_unit *unit = scpnt->device->hostdata;
 175         struct zfcp_fsf_req *old_req, *abrt_req;
 176         unsigned long flags;
 177         unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
 178         int retval = SUCCESS, ret;
 179         int retry = 3;
 180         char *dbf_tag;
 181
 182         /* avoid race condition between late normal completion and abort */
 183         write_lock_irqsave(&adapter->abort_lock, flags);
 184
 185         old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
 186         if (!old_req) {
 187                 write_unlock_irqrestore(&adapter->abort_lock, flags);
 188                 zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
 189                                     old_reqid);
 190                 return FAILED; /* completion could be in progress */
 191         }
 192         old_req->data = NULL;
 193
 194         /* don't access old fsf_req after releasing the abort_lock */
 195         write_unlock_irqrestore(&adapter->abort_lock, flags);
 196
 197         while (retry--) {
 198                 abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit);
 199                 if (abrt_req)
 200                         break;
 201
 202                 zfcp_erp_wait(adapter);
 203                 ret = fc_block_scsi_eh(scpnt);
 204                 if (ret)
 205                         return ret;
 206                 if (!(atomic_read(&adapter->status) &
 207                       ZFCP_STATUS_COMMON_RUNNING)) {
 208                         zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
 209                                             old_reqid);
 210                         return SUCCESS;
 211                 }
 212         }
 213         if (!abrt_req)
 214                 return FAILED;
 215
 216         wait_for_completion(&abrt_req->completion);
 217
 218         if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
 219                 dbf_tag = "okay";
 220         else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
 221                 dbf_tag = "lte2";
 222         else {
 223                 dbf_tag = "fail";
 224                 retval = FAILED;
 225         }
 226         zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
 227         zfcp_fsf_req_free(abrt_req);
 228         return retval;
 229 }
 230
 231 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
 232 {
 233         struct zfcp_unit *unit = scpnt->device->hostdata;
 234         struct zfcp_adapter *adapter = unit->port->adapter;
 235         struct zfcp_fsf_req *fsf_req = NULL;
 236         int retval = SUCCESS, ret;
 237         int retry = 3;
 238
 239         while (retry--) {
 240                 fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
 241                 if (fsf_req)
 242                         break;
 243
 244                 zfcp_erp_wait(adapter);
 245                 ret = fc_block_scsi_eh(scpnt);
 246                 if (ret)
 247                         return ret;
 248
 249                 if (!(atomic_read(&adapter->status) &
 250                       ZFCP_STATUS_COMMON_RUNNING)) {
 251                         zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
 252                         return SUCCESS;
 253                 }
 254         }
 255         if (!fsf_req)
 256                 return FAILED;
 257
 258         wait_for_completion(&fsf_req->completion);
 259
 260         if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
 261                 zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
 262                 retval = FAILED;
 263         } else
 264                 zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
 265
 266         zfcp_fsf_req_free(fsf_req);
 267         return retval;
 268 }
 269
 270 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
 271 {
 272         return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
 273 }
 274
 275 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
 276 {
 277         return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
 278 }
 279
 280 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
 281 {
 282         struct zfcp_unit *unit = scpnt->device->hostdata;
 283         struct zfcp_adapter *adapter = unit->port->adapter;
 284         int ret;
 285
 286         zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
 287         zfcp_erp_wait(adapter);
 288         ret = fc_block_scsi_eh(scpnt);
 289         if (ret)
 290                 return ret;
 291
 292         return SUCCESS;
 293 }
 294
 295 int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
 296 {
 297         struct ccw_dev_id dev_id;
 298
 299         if (adapter->scsi_host)
 300                 return 0;
 301
 302         ccw_device_get_id(adapter->ccw_device, &dev_id);
 303         /* register adapter as SCSI host with mid layer of SCSI stack */
 304         adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
 305                                              sizeof (struct zfcp_adapter *));
 306         if (!adapter->scsi_host) {
 307                 dev_err(&adapter->ccw_device->dev,
 308                         "Registering the FCP device with the "
 309                         "SCSI stack failed\n");
 310                 return -EIO;
 311         }
 312
 313         /* tell the SCSI stack some characteristics of this adapter */
 314         adapter->scsi_host->max_id = 1;
 315         adapter->scsi_host->max_lun = 1;
 316         adapter->scsi_host->max_channel = 0;
 317         adapter->scsi_host->unique_id = dev_id.devno;
 318         adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
 319         adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
 320
 321         adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
 322
 323         if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
 324                 scsi_host_put(adapter->scsi_host);
 325                 return -EIO;
 326         }
 327
 328         return 0;
 329 }
 330
 331 void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
 332 {
 333         struct Scsi_Host *shost;
 334         struct zfcp_port *port;
 335
 336         shost = adapter->scsi_host;
 337         if (!shost)
 338                 return;
 339
 340         read_lock_irq(&adapter->port_list_lock);
 341         list_for_each_entry(port, &adapter->port_list, list)
 342                 port->rport = NULL;
 343         read_unlock_irq(&adapter->port_list_lock);
 344
 345         fc_remove_host(shost);
 346         scsi_remove_host(shost);
 347         scsi_host_put(shost);
 348         adapter->scsi_host = NULL;
 349
 350         return;
 351 }
 352
 353 static struct fc_host_statistics*
 354 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
 355 {
 356         struct fc_host_statistics *fc_stats;
 357
 358         if (!adapter->fc_stats) {
 359                 fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
 360                 if (!fc_stats)
 361                         return NULL;
 362                 adapter->fc_stats = fc_stats; /* freed in adapter_release */
 363         }
 364         memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
 365         return adapter->fc_stats;
 366 }
 367
 368 static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
 369                                       struct fsf_qtcb_bottom_port *data,
 370                                       struct fsf_qtcb_bottom_port *old)
 371 {
 372         fc_stats->seconds_since_last_reset =
 373                 data->seconds_since_last_reset - old->seconds_since_last_reset;
 374         fc_stats->tx_frames = data->tx_frames - old->tx_frames;
 375         fc_stats->tx_words = data->tx_words - old->tx_words;
 376         fc_stats->rx_frames = data->rx_frames - old->rx_frames;
 377         fc_stats->rx_words = data->rx_words - old->rx_words;
 378         fc_stats->lip_count = data->lip - old->lip;
 379         fc_stats->nos_count = data->nos - old->nos;
 380         fc_stats->error_frames = data->error_frames - old->error_frames;
 381         fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
 382         fc_stats->link_failure_count = data->link_failure - old->link_failure;
 383         fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
 384         fc_stats->loss_of_signal_count =
 385                 data->loss_of_signal - old->loss_of_signal;
 386         fc_stats->prim_seq_protocol_err_count =
 387                 data->psp_error_counts - old->psp_error_counts;
 388         fc_stats->invalid_tx_word_count =
 389                 data->invalid_tx_words - old->invalid_tx_words;
 390         fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
 391         fc_stats->fcp_input_requests =
 392                 data->input_requests - old->input_requests;
 393         fc_stats->fcp_output_requests =
 394                 data->output_requests - old->output_requests;
 395         fc_stats->fcp_control_requests =
 396                 data->control_requests - old->control_requests;
 397         fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
 398         fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
 399 }
 400
 401 static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
 402                                    struct fsf_qtcb_bottom_port *data)
 403 {
 404         fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
 405         fc_stats->tx_frames = data->tx_frames;
 406         fc_stats->tx_words = data->tx_words;
 407         fc_stats->rx_frames = data->rx_frames;
 408         fc_stats->rx_words = data->rx_words;
 409         fc_stats->lip_count = data->lip;
 410         fc_stats->nos_count = data->nos;
 411         fc_stats->error_frames = data->error_frames;
 412         fc_stats->dumped_frames = data->dumped_frames;
 413         fc_stats->link_failure_count = data->link_failure;
 414         fc_stats->loss_of_sync_count = data->loss_of_sync;
 415         fc_stats->loss_of_signal_count = data->loss_of_signal;
 416         fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
 417         fc_stats->invalid_tx_word_count = data->invalid_tx_words;
 418         fc_stats->invalid_crc_count = data->invalid_crcs;
 419         fc_stats->fcp_input_requests = data->input_requests;
 420         fc_stats->fcp_output_requests = data->output_requests;
 421         fc_stats->fcp_control_requests = data->control_requests;
 422         fc_stats->fcp_input_megabytes = data->input_mb;
 423         fc_stats->fcp_output_megabytes = data->output_mb;
 424 }
 425
 426 static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
 427 {
 428         struct zfcp_adapter *adapter;
 429         struct fc_host_statistics *fc_stats;
 430         struct fsf_qtcb_bottom_port *data;
 431         int ret;
 432
 433         adapter = (struct zfcp_adapter *)host->hostdata[0];
 434         fc_stats = zfcp_init_fc_host_stats(adapter);
 435         if (!fc_stats)
 436                 return NULL;
 437
 438         data = kzalloc(sizeof(*data), GFP_KERNEL);
 439         if (!data)
 440                 return NULL;
 441
 442         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
 443         if (ret) {
 444                 kfree(data);
 445                 return NULL;
 446         }
 447
 448         if (adapter->stats_reset &&
 449             ((jiffies/HZ - adapter->stats_reset) <
 450              data->seconds_since_last_reset))
 451                 zfcp_adjust_fc_host_stats(fc_stats, data,
 452                                           adapter->stats_reset_data);
 453         else
 454                 zfcp_set_fc_host_stats(fc_stats, data);
 455
 456         kfree(data);
 457         return fc_stats;
 458 }
 459
 460 static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
 461 {
 462         struct zfcp_adapter *adapter;
 463         struct fsf_qtcb_bottom_port *data;
 464         int ret;
 465
 466         adapter = (struct zfcp_adapter *)shost->hostdata[0];
 467         data = kzalloc(sizeof(*data), GFP_KERNEL);
 468         if (!data)
 469                 return;
 470
 471         ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
 472         if (ret)
 473                 kfree(data);
 474         else {
 475                 adapter->stats_reset = jiffies/HZ;
 476                 kfree(adapter->stats_reset_data);
 477                 adapter->stats_reset_data = data; /* finally freed in
 478                                                      adapter_release */
 479         }
 480 }
 481
 482 static void zfcp_get_host_port_state(struct Scsi_Host *shost)
 483 {
 484         struct zfcp_adapter *adapter =
 485                 (struct zfcp_adapter *)shost->hostdata[0];
 486         int status = atomic_read(&adapter->status);
 487
 488         if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
 489             !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
 490                 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
 491         else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 492                 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
 493         else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
 494                 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
 495         else
 496                 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
 497 }
 498
 499 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
 500 {
 501         rport->dev_loss_tmo = timeout;
 502 }
 503
 504 /**
 505  * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
 506  * @rport: The FC rport where to teminate I/O
 507  *
 508  * Abort all pending SCSI commands for a port by closing the
 509  * port. Using a reopen avoiding a conflict with a shutdown
 510  * overwriting a reopen.
 511  */
 512 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
 513 {
 514         struct zfcp_port *port;
 515         struct Scsi_Host *shost = rport_to_shost(rport);
 516         struct zfcp_adapter *adapter =
 517                 (struct zfcp_adapter *)shost->hostdata[0];
 518
 519         port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
 520
 521         if (port) {
 522                 zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
 523                 put_device(&port->dev);
 524         }
 525 }
 526
 527 static void zfcp_scsi_rport_register(struct zfcp_port *port)
 528 {
 529         struct fc_rport_identifiers ids;
 530         struct fc_rport *rport;
 531
 532         if (port->rport)
 533                 return;
 534
 535         ids.node_name = port->wwnn;
 536         ids.port_name = port->wwpn;
 537         ids.port_id = port->d_id;
 538         ids.roles = FC_RPORT_ROLE_FCP_TARGET;
 539
 540         rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
 541         if (!rport) {
 542                 dev_err(&port->adapter->ccw_device->dev,
 543                         "Registering port 0x%016Lx failed\n",
 544                         (unsigned long long)port->wwpn);
 545                 return;
 546         }
 547
 548         rport->maxframe_size = port->maxframe_size;
 549         rport->supported_classes = port->supported_classes;
 550         port->rport = rport;
 551 }
 552
 553 static void zfcp_scsi_rport_block(struct zfcp_port *port)
 554 {
 555         struct fc_rport *rport = port->rport;
 556
 557         if (rport) {
 558                 fc_remote_port_delete(rport);
 559                 port->rport = NULL;
 560         }
 561 }
 562
 563 void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
 564 {
 565         get_device(&port->dev);
 566         port->rport_task = RPORT_ADD;
 567
 568         if (!queue_work(port->adapter->work_queue, &port->rport_work))
 569                 put_device(&port->dev);
 570 }
 571
 572 void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
 573 {
 574         get_device(&port->dev);
 575         port->rport_task = RPORT_DEL;
 576
 577         if (port->rport && queue_work(port->adapter->work_queue,
 578                                       &port->rport_work))
 579                 return;
 580
 581         put_device(&port->dev);
 582 }
 583
 584 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
 585 {
 586         unsigned long flags;
 587         struct zfcp_port *port;
 588
 589         read_lock_irqsave(&adapter->port_list_lock, flags);
 590         list_for_each_entry(port, &adapter->port_list, list)
 591                 zfcp_scsi_schedule_rport_block(port);
 592         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 593 }
 594
 595 void zfcp_scsi_rport_work(struct work_struct *work)
 596 {
 597         struct zfcp_port *port = container_of(work, struct zfcp_port,
 598                                               rport_work);
 599
 600         while (port->rport_task) {
 601                 if (port->rport_task == RPORT_ADD) {
 602                         port->rport_task = RPORT_NONE;
 603                         zfcp_scsi_rport_register(port);
 604                 } else {
 605                         port->rport_task = RPORT_NONE;
 606                         zfcp_scsi_rport_block(port);
 607                 }
 608         }
 609
 610         put_device(&port->dev);
 611 }
 612
 613
 614 void zfcp_scsi_scan(struct work_struct *work)
 615 {
 616         struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
 617                                               scsi_work);
 618         struct fc_rport *rport;
 619
 620         flush_work(&unit->port->rport_work);
 621         rport = unit->port->rport;
 622
 623         if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
 624                 scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
 625                                  scsilun_to_int((struct scsi_lun *)
 626                                                 &unit->fcp_lun), 0);
 627
 628         put_device(&unit->dev);
 629 }
 630
 631 struct fc_function_template zfcp_transport_functions = {
 632         .show_starget_port_id = 1,
 633         .show_starget_port_name = 1,
 634         .show_starget_node_name = 1,
 635         .show_rport_supported_classes = 1,
 636         .show_rport_maxframe_size = 1,
 637         .show_rport_dev_loss_tmo = 1,
 638         .show_host_node_name = 1,
 639         .show_host_port_name = 1,
 640         .show_host_permanent_port_name = 1,
 641         .show_host_supported_classes = 1,
 642         .show_host_supported_fc4s = 1,
 643         .show_host_supported_speeds = 1,
 644         .show_host_maxframe_size = 1,
 645         .show_host_serial_number = 1,
 646         .get_fc_host_stats = zfcp_get_fc_host_stats,
 647         .reset_fc_host_stats = zfcp_reset_fc_host_stats,
 648         .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
 649         .get_host_port_state = zfcp_get_host_port_state,
 650         .terminate_rport_io = zfcp_scsi_terminate_rport_io,
 651         .show_host_port_state = 1,
 652         .show_host_active_fc4s = 1,
 653         .bsg_request = zfcp_fc_exec_bsg_job,
 654         .bsg_timeout = zfcp_fc_timeout_bsg_job,
 655         /* no functions registered for following dynamic attributes but
 656            directly set by LLDD */
 657         .show_host_port_type = 1,
 658         .show_host_speed = 1,
 659         .show_host_port_id = 1,
 660         .disable_target_scan = 1,
 661         .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
 662 };
 663
 664 struct zfcp_data zfcp_data = {
 665         .scsi_host_template = {
 666                 .name                    = "zfcp",
 667                 .module                  = THIS_MODULE,
 668                 .proc_name               = "zfcp",
 669                 .change_queue_depth      = zfcp_scsi_change_queue_depth,
 670                 .slave_alloc             = zfcp_scsi_slave_alloc,
 671                 .slave_configure         = zfcp_scsi_slave_configure,
 672                 .slave_destroy           = zfcp_scsi_slave_destroy,
 673                 .queuecommand            = zfcp_scsi_queuecommand,
 674                 .eh_abort_handler        = zfcp_scsi_eh_abort_handler,
 675                 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
 676                 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
 677                 .eh_host_reset_handler   = zfcp_scsi_eh_host_reset_handler,
 678                 .can_queue               = 4096,
 679                 .this_id                 = -1,
 680                 .sg_tablesize            = ZFCP_MAX_SBALES_PER_REQ,
 681                 .cmd_per_lun             = 1,
 682                 .use_clustering          = 1,
 683                 .sdev_attrs              = zfcp_sysfs_sdev_attrs,
 684                 .max_sectors             = (ZFCP_MAX_SBALES_PER_REQ * 8),
 685                 .shost_attrs             = zfcp_sysfs_shost_attrs,
 686         },
 687 };