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

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2008
   7  */
   8
   9 #include <linux/blktrace_api.h>
  10 #include "zfcp_ext.h"
  11
  12 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  13 {
  14         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  15         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
  16                                 NULL);
  17 }
  18
  19 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  20                                  unsigned long timeout)
  21 {
  22         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  23         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  24         fsf_req->timer.expires = jiffies + timeout;
  25         add_timer(&fsf_req->timer);
  26 }
  27
  28 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  29 {
  30         BUG_ON(!fsf_req->erp_action);
  31         fsf_req->timer.function = zfcp_erp_timeout_handler;
  32         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  33         fsf_req->timer.expires = jiffies + 30 * HZ;
  34         add_timer(&fsf_req->timer);
  35 }
  36
  37 /* association between FSF command and FSF QTCB type */
  38 static u32 fsf_qtcb_type[] = {
  39         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  40         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  41         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  42         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  43         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  44         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  45         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  46         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  47         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  48         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  49         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  50         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  51         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  52 };
  53
  54 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
  55 {
  56         u16 subtable = table >> 16;
  57         u16 rule = table & 0xffff;
  58         const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
  59
  60         if (subtable && subtable < ARRAY_SIZE(act_type))
  61                 dev_warn(&adapter->ccw_device->dev,
  62                          "Access denied according to ACT rule type %s, "
  63                          "rule %d\n", act_type[subtable], rule);
  64 }
  65
  66 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
  67                                         struct zfcp_port *port)
  68 {
  69         struct fsf_qtcb_header *header = &req->qtcb->header;
  70         dev_warn(&req->adapter->ccw_device->dev,
  71                  "Access denied to port 0x%016Lx\n",
  72                  (unsigned long long)port->wwpn);
  73         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  74         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  75         zfcp_erp_port_access_denied(port, 55, req);
  76         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  77 }
  78
  79 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
  80                                         struct zfcp_unit *unit)
  81 {
  82         struct fsf_qtcb_header *header = &req->qtcb->header;
  83         dev_warn(&req->adapter->ccw_device->dev,
  84                  "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
  85                  (unsigned long long)unit->fcp_lun,
  86                  (unsigned long long)unit->port->wwpn);
  87         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  88         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  89         zfcp_erp_unit_access_denied(unit, 59, req);
  90         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  91 }
  92
  93 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  94 {
  95         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  96                 "operational because of an unsupported FC class\n");
  97         zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
  98         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  99 }
 100
 101 /**
 102  * zfcp_fsf_req_free - free memory used by fsf request
 103  * @fsf_req: pointer to struct zfcp_fsf_req
 104  */
 105 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
 106 {
 107         if (likely(req->pool)) {
 108                 mempool_free(req, req->pool);
 109                 return;
 110         }
 111
 112         if (req->qtcb) {
 113                 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
 114                 return;
 115         }
 116 }
 117
 118 /**
 119  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 120  * @adapter: pointer to struct zfcp_adapter
 121  *
 122  * Never ever call this without shutting down the adapter first.
 123  * Otherwise the adapter would continue using and corrupting s390 storage.
 124  * Included BUG_ON() call to ensure this is done.
 125  * ERP is supposed to be the only user of this function.
 126  */
 127 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 128 {
 129         struct zfcp_fsf_req *req, *tmp;
 130         unsigned long flags;
 131         LIST_HEAD(remove_queue);
 132         unsigned int i;
 133
 134         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 135         spin_lock_irqsave(&adapter->req_list_lock, flags);
 136         for (i = 0; i < REQUEST_LIST_SIZE; i++)
 137                 list_splice_init(&adapter->req_list[i], &remove_queue);
 138         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 139
 140         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 141                 list_del(&req->list);
 142                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 143                 zfcp_fsf_req_complete(req);
 144         }
 145 }
 146
 147 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 148 {
 149         struct fsf_status_read_buffer *sr_buf = req->data;
 150         struct zfcp_adapter *adapter = req->adapter;
 151         struct zfcp_port *port;
 152         int d_id = sr_buf->d_id & ZFCP_DID_MASK;
 153         unsigned long flags;
 154
 155         read_lock_irqsave(&zfcp_data.config_lock, flags);
 156         list_for_each_entry(port, &adapter->port_list_head, list)
 157                 if (port->d_id == d_id) {
 158                         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 159                         switch (sr_buf->status_subtype) {
 160                         case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
 161                                 zfcp_erp_port_reopen(port, 0, 101, req);
 162                                 break;
 163                         case FSF_STATUS_READ_SUB_ERROR_PORT:
 164                                 zfcp_erp_port_shutdown(port, 0, 122, req);
 165                                 break;
 166                         }
 167                         return;
 168                 }
 169         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 170 }
 171
 172 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
 173                                          struct fsf_link_down_info *link_down)
 174 {
 175         struct zfcp_adapter *adapter = req->adapter;
 176
 177         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 178                 return;
 179
 180         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 181
 182         if (!link_down)
 183                 goto out;
 184
 185         switch (link_down->error_code) {
 186         case FSF_PSQ_LINK_NO_LIGHT:
 187                 dev_warn(&req->adapter->ccw_device->dev,
 188                          "There is no light signal from the local "
 189                          "fibre channel cable\n");
 190                 break;
 191         case FSF_PSQ_LINK_WRAP_PLUG:
 192                 dev_warn(&req->adapter->ccw_device->dev,
 193                          "There is a wrap plug instead of a fibre "
 194                          "channel cable\n");
 195                 break;
 196         case FSF_PSQ_LINK_NO_FCP:
 197                 dev_warn(&req->adapter->ccw_device->dev,
 198                          "The adjacent fibre channel node does not "
 199                          "support FCP\n");
 200                 break;
 201         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 202                 dev_warn(&req->adapter->ccw_device->dev,
 203                          "The FCP device is suspended because of a "
 204                          "firmware update\n");
 205                 break;
 206         case FSF_PSQ_LINK_INVALID_WWPN:
 207                 dev_warn(&req->adapter->ccw_device->dev,
 208                          "The FCP device detected a WWPN that is "
 209                          "duplicate or not valid\n");
 210                 break;
 211         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 212                 dev_warn(&req->adapter->ccw_device->dev,
 213                          "The fibre channel fabric does not support NPIV\n");
 214                 break;
 215         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 216                 dev_warn(&req->adapter->ccw_device->dev,
 217                          "The FCP adapter cannot support more NPIV ports\n");
 218                 break;
 219         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 220                 dev_warn(&req->adapter->ccw_device->dev,
 221                          "The adjacent switch cannot support "
 222                          "more NPIV ports\n");
 223                 break;
 224         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 225                 dev_warn(&req->adapter->ccw_device->dev,
 226                          "The FCP adapter could not log in to the "
 227                          "fibre channel fabric\n");
 228                 break;
 229         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 230                 dev_warn(&req->adapter->ccw_device->dev,
 231                          "The WWPN assignment file on the FCP adapter "
 232                          "has been damaged\n");
 233                 break;
 234         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 235                 dev_warn(&req->adapter->ccw_device->dev,
 236                          "The mode table on the FCP adapter "
 237                          "has been damaged\n");
 238                 break;
 239         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 240                 dev_warn(&req->adapter->ccw_device->dev,
 241                          "All NPIV ports on the FCP adapter have "
 242                          "been assigned\n");
 243                 break;
 244         default:
 245                 dev_warn(&req->adapter->ccw_device->dev,
 246                          "The link between the FCP adapter and "
 247                          "the FC fabric is down\n");
 248         }
 249 out:
 250         zfcp_erp_adapter_failed(adapter, id, req);
 251 }
 252
 253 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 254 {
 255         struct fsf_status_read_buffer *sr_buf = req->data;
 256         struct fsf_link_down_info *ldi =
 257                 (struct fsf_link_down_info *) &sr_buf->payload;
 258
 259         switch (sr_buf->status_subtype) {
 260         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 261                 zfcp_fsf_link_down_info_eval(req, 38, ldi);
 262                 break;
 263         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 264                 zfcp_fsf_link_down_info_eval(req, 39, ldi);
 265                 break;
 266         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 267                 zfcp_fsf_link_down_info_eval(req, 40, NULL);
 268         };
 269 }
 270
 271 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 272 {
 273         struct zfcp_adapter *adapter = req->adapter;
 274         struct fsf_status_read_buffer *sr_buf = req->data;
 275
 276         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 277                 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
 278                 mempool_free(sr_buf, adapter->pool.data_status_read);
 279                 zfcp_fsf_req_free(req);
 280                 return;
 281         }
 282
 283         zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
 284
 285         switch (sr_buf->status_type) {
 286         case FSF_STATUS_READ_PORT_CLOSED:
 287                 zfcp_fsf_status_read_port_closed(req);
 288                 break;
 289         case FSF_STATUS_READ_INCOMING_ELS:
 290                 zfcp_fc_incoming_els(req);
 291                 break;
 292         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 293                 break;
 294         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 295                 dev_warn(&adapter->ccw_device->dev,
 296                          "The error threshold for checksum statistics "
 297                          "has been exceeded\n");
 298                 zfcp_hba_dbf_event_berr(adapter, req);
 299                 break;
 300         case FSF_STATUS_READ_LINK_DOWN:
 301                 zfcp_fsf_status_read_link_down(req);
 302                 break;
 303         case FSF_STATUS_READ_LINK_UP:
 304                 dev_info(&adapter->ccw_device->dev,
 305                          "The local link has been restored\n");
 306                 /* All ports should be marked as ready to run again */
 307                 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
 308                                                ZFCP_STATUS_COMMON_RUNNING,
 309                                                ZFCP_SET);
 310                 zfcp_erp_adapter_reopen(adapter,
 311                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 312                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 313                                         102, req);
 314                 break;
 315         case FSF_STATUS_READ_NOTIFICATION_LOST:
 316                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 317                         zfcp_erp_adapter_access_changed(adapter, 135, req);
 318                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 319                         schedule_work(&adapter->scan_work);
 320                 break;
 321         case FSF_STATUS_READ_CFDC_UPDATED:
 322                 zfcp_erp_adapter_access_changed(adapter, 136, req);
 323                 break;
 324         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 325                 adapter->adapter_features = sr_buf->payload.word[0];
 326                 break;
 327         }
 328
 329         mempool_free(sr_buf, adapter->pool.data_status_read);
 330         zfcp_fsf_req_free(req);
 331
 332         atomic_inc(&adapter->stat_miss);
 333         queue_work(zfcp_data.work_queue, &adapter->stat_work);
 334 }
 335
 336 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 337 {
 338         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 339         case FSF_SQ_FCP_RSP_AVAILABLE:
 340         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 341         case FSF_SQ_NO_RETRY_POSSIBLE:
 342         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 343                 return;
 344         case FSF_SQ_COMMAND_ABORTED:
 345                 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
 346                 break;
 347         case FSF_SQ_NO_RECOM:
 348                 dev_err(&req->adapter->ccw_device->dev,
 349                         "The FCP adapter reported a problem "
 350                         "that cannot be recovered\n");
 351                 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
 352                 break;
 353         }
 354         /* all non-return stats set FSFREQ_ERROR*/
 355         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 356 }
 357
 358 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 359 {
 360         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 361                 return;
 362
 363         switch (req->qtcb->header.fsf_status) {
 364         case FSF_UNKNOWN_COMMAND:
 365                 dev_err(&req->adapter->ccw_device->dev,
 366                         "The FCP adapter does not recognize the command 0x%x\n",
 367                         req->qtcb->header.fsf_command);
 368                 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
 369                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 370                 break;
 371         case FSF_ADAPTER_STATUS_AVAILABLE:
 372                 zfcp_fsf_fsfstatus_qual_eval(req);
 373                 break;
 374         }
 375 }
 376
 377 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 378 {
 379         struct zfcp_adapter *adapter = req->adapter;
 380         struct fsf_qtcb *qtcb = req->qtcb;
 381         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 382
 383         zfcp_hba_dbf_event_fsf_response(req);
 384
 385         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 386                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 387                         ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
 388                 return;
 389         }
 390
 391         switch (qtcb->prefix.prot_status) {
 392         case FSF_PROT_GOOD:
 393         case FSF_PROT_FSF_STATUS_PRESENTED:
 394                 return;
 395         case FSF_PROT_QTCB_VERSION_ERROR:
 396                 dev_err(&adapter->ccw_device->dev,
 397                         "QTCB version 0x%x not supported by FCP adapter "
 398                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 399                         psq->word[0], psq->word[1]);
 400                 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
 401                 break;
 402         case FSF_PROT_ERROR_STATE:
 403         case FSF_PROT_SEQ_NUMB_ERROR:
 404                 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
 405                 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 406                 break;
 407         case FSF_PROT_UNSUPP_QTCB_TYPE:
 408                 dev_err(&adapter->ccw_device->dev,
 409                         "The QTCB type is not supported by the FCP adapter\n");
 410                 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
 411                 break;
 412         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 413                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 414                                 &adapter->status);
 415                 break;
 416         case FSF_PROT_DUPLICATE_REQUEST_ID:
 417                 dev_err(&adapter->ccw_device->dev,
 418                         "0x%Lx is an ambiguous request identifier\n",
 419                         (unsigned long long)qtcb->bottom.support.req_handle);
 420                 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
 421                 break;
 422         case FSF_PROT_LINK_DOWN:
 423                 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
 424                 /* FIXME: reopening adapter now? better wait for link up */
 425                 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
 426                 break;
 427         case FSF_PROT_REEST_QUEUE:
 428                 /* All ports should be marked as ready to run again */
 429                 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
 430                                                ZFCP_STATUS_COMMON_RUNNING,
 431                                                ZFCP_SET);
 432                 zfcp_erp_adapter_reopen(adapter,
 433                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 434                                         ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
 435                 break;
 436         default:
 437                 dev_err(&adapter->ccw_device->dev,
 438                         "0x%x is not a valid transfer protocol status\n",
 439                         qtcb->prefix.prot_status);
 440                 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
 441         }
 442         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 443 }
 444
 445 /**
 446  * zfcp_fsf_req_complete - process completion of a FSF request
 447  * @fsf_req: The FSF request that has been completed.
 448  *
 449  * When a request has been completed either from the FCP adapter,
 450  * or it has been dismissed due to a queue shutdown, this function
 451  * is called to process the completion status and trigger further
 452  * events related to the FSF request.
 453  */
 454 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 455 {
 456         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 457                 zfcp_fsf_status_read_handler(req);
 458                 return;
 459         }
 460
 461         del_timer(&req->timer);
 462         zfcp_fsf_protstatus_eval(req);
 463         zfcp_fsf_fsfstatus_eval(req);
 464         req->handler(req);
 465
 466         if (req->erp_action)
 467                 zfcp_erp_notify(req->erp_action, 0);
 468         req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
 469
 470         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 471                 zfcp_fsf_req_free(req);
 472         else
 473         /* notify initiator waiting for the requests completion */
 474         /*
 475          * FIXME: Race! We must not access fsf_req here as it might have been
 476          * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
 477          * flag. It's an improbable case. But, we have the same paranoia for
 478          * the cleanup flag already.
 479          * Might better be handled using complete()?
 480          * (setting the flag and doing wakeup ought to be atomic
 481          *  with regard to checking the flag as long as waitqueue is
 482          *  part of the to be released structure)
 483          */
 484                 wake_up(&req->completion_wq);
 485 }
 486
 487 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 488 {
 489         struct fsf_qtcb_bottom_config *bottom;
 490         struct zfcp_adapter *adapter = req->adapter;
 491         struct Scsi_Host *shost = adapter->scsi_host;
 492
 493         bottom = &req->qtcb->bottom.config;
 494
 495         if (req->data)
 496                 memcpy(req->data, bottom, sizeof(*bottom));
 497
 498         fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
 499         fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
 500         fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
 501         fc_host_speed(shost) = bottom->fc_link_speed;
 502         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 503
 504         adapter->hydra_version = bottom->adapter_type;
 505         adapter->timer_ticks = bottom->timer_interval;
 506
 507         if (fc_host_permanent_port_name(shost) == -1)
 508                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 509
 510         switch (bottom->fc_topology) {
 511         case FSF_TOPO_P2P:
 512                 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
 513                 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
 514                 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
 515                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 516                 break;
 517         case FSF_TOPO_FABRIC:
 518                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 519                 break;
 520         case FSF_TOPO_AL:
 521                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 522         default:
 523                 dev_err(&adapter->ccw_device->dev,
 524                         "Unknown or unsupported arbitrated loop "
 525                         "fibre channel topology detected\n");
 526                 zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
 527                 return -EIO;
 528         }
 529
 530         return 0;
 531 }
 532
 533 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 534 {
 535         struct zfcp_adapter *adapter = req->adapter;
 536         struct fsf_qtcb *qtcb = req->qtcb;
 537         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 538         struct Scsi_Host *shost = adapter->scsi_host;
 539
 540         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 541                 return;
 542
 543         adapter->fsf_lic_version = bottom->lic_version;
 544         adapter->adapter_features = bottom->adapter_features;
 545         adapter->connection_features = bottom->connection_features;
 546         adapter->peer_wwpn = 0;
 547         adapter->peer_wwnn = 0;
 548         adapter->peer_d_id = 0;
 549
 550         switch (qtcb->header.fsf_status) {
 551         case FSF_GOOD:
 552                 if (zfcp_fsf_exchange_config_evaluate(req))
 553                         return;
 554
 555                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 556                         dev_err(&adapter->ccw_device->dev,
 557                                 "FCP adapter maximum QTCB size (%d bytes) "
 558                                 "is too small\n",
 559                                 bottom->max_qtcb_size);
 560                         zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
 561                         return;
 562                 }
 563                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 564                                 &adapter->status);
 565                 break;
 566         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 567                 fc_host_node_name(shost) = 0;
 568                 fc_host_port_name(shost) = 0;
 569                 fc_host_port_id(shost) = 0;
 570                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 571                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 572                 adapter->hydra_version = 0;
 573
 574                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 575                                 &adapter->status);
 576
 577                 zfcp_fsf_link_down_info_eval(req, 42,
 578                         &qtcb->header.fsf_status_qual.link_down_info);
 579                 break;
 580         default:
 581                 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
 582                 return;
 583         }
 584
 585         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 586                 adapter->hardware_version = bottom->hardware_version;
 587                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 588                        min(FC_SERIAL_NUMBER_SIZE, 17));
 589                 EBCASC(fc_host_serial_number(shost),
 590                        min(FC_SERIAL_NUMBER_SIZE, 17));
 591         }
 592
 593         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 594                 dev_err(&adapter->ccw_device->dev,
 595                         "The FCP adapter only supports newer "
 596                         "control block versions\n");
 597                 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
 598                 return;
 599         }
 600         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 601                 dev_err(&adapter->ccw_device->dev,
 602                         "The FCP adapter only supports older "
 603                         "control block versions\n");
 604                 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
 605         }
 606 }
 607
 608 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 609 {
 610         struct zfcp_adapter *adapter = req->adapter;
 611         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 612         struct Scsi_Host *shost = adapter->scsi_host;
 613
 614         if (req->data)
 615                 memcpy(req->data, bottom, sizeof(*bottom));
 616
 617         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
 618                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 619         else
 620                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 621         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 622         fc_host_supported_speeds(shost) = bottom->supported_speed;
 623 }
 624
 625 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 626 {
 627         struct fsf_qtcb *qtcb = req->qtcb;
 628
 629         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 630                 return;
 631
 632         switch (qtcb->header.fsf_status) {
 633         case FSF_GOOD:
 634                 zfcp_fsf_exchange_port_evaluate(req);
 635                 break;
 636         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 637                 zfcp_fsf_exchange_port_evaluate(req);
 638                 zfcp_fsf_link_down_info_eval(req, 43,
 639                         &qtcb->header.fsf_status_qual.link_down_info);
 640                 break;
 641         }
 642 }
 643
 644 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
 645 {
 646         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 647
 648         spin_lock_bh(&adapter->req_q_lock);
 649         if (atomic_read(&req_q->count))
 650                 return 1;
 651         spin_unlock_bh(&adapter->req_q_lock);
 652         return 0;
 653 }
 654
 655 static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
 656 {
 657         unsigned int count = atomic_read(&adapter->req_q.count);
 658         if (!count)
 659                 atomic_inc(&adapter->qdio_outb_full);
 660         return count > 0;
 661 }
 662
 663 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
 664 {
 665         long ret;
 666
 667         spin_unlock_bh(&adapter->req_q_lock);
 668         ret = wait_event_interruptible_timeout(adapter->request_wq,
 669                                         zfcp_fsf_sbal_check(adapter), 5 * HZ);
 670         if (ret > 0)
 671                 return 0;
 672         if (!ret)
 673                 atomic_inc(&adapter->qdio_outb_full);
 674
 675         spin_lock_bh(&adapter->req_q_lock);
 676         return -EIO;
 677 }
 678
 679 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
 680 {
 681         struct zfcp_fsf_req *req;
 682         req = mempool_alloc(pool, GFP_ATOMIC);
 683         if (!req)
 684                 return NULL;
 685         memset(req, 0, sizeof(*req));
 686         req->pool = pool;
 687         return req;
 688 }
 689
 690 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
 691 {
 692         struct zfcp_fsf_req_qtcb *qtcb;
 693
 694         if (likely(pool))
 695                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 696         else
 697                 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
 698                                         GFP_ATOMIC);
 699         if (unlikely(!qtcb))
 700                 return NULL;
 701
 702         memset(qtcb, 0, sizeof(*qtcb));
 703         qtcb->fsf_req.qtcb = &qtcb->qtcb;
 704         qtcb->fsf_req.pool = pool;
 705
 706         return &qtcb->fsf_req;
 707 }
 708
 709 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
 710                                                 u32 fsf_cmd, int req_flags,
 711                                                 mempool_t *pool)
 712 {
 713         struct qdio_buffer_element *sbale;
 714
 715         struct zfcp_fsf_req *req;
 716         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 717
 718         if (req_flags & ZFCP_REQ_NO_QTCB)
 719                 req = zfcp_fsf_alloc_noqtcb(pool);
 720         else
 721                 req = zfcp_fsf_alloc_qtcb(pool);
 722
 723         if (unlikely(!req))
 724                 return ERR_PTR(-EIO);
 725
 726         if (adapter->req_no == 0)
 727                 adapter->req_no++;
 728
 729         INIT_LIST_HEAD(&req->list);
 730         init_timer(&req->timer);
 731         init_waitqueue_head(&req->completion_wq);
 732
 733         req->adapter = adapter;
 734         req->fsf_command = fsf_cmd;
 735         req->req_id = adapter->req_no++;
 736         req->sbal_number = 1;
 737         req->sbal_first = req_q->first;
 738         req->sbal_last = req_q->first;
 739         req->sbale_curr = 1;
 740
 741         sbale = zfcp_qdio_sbale_req(req);
 742         sbale[0].addr = (void *) req->req_id;
 743         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 744
 745         if (likely(req->qtcb)) {
 746                 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
 747                 req->qtcb->prefix.req_id = req->req_id;
 748                 req->qtcb->prefix.ulp_info = 26;
 749                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 750                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 751                 req->qtcb->header.req_handle = req->req_id;
 752                 req->qtcb->header.fsf_command = req->fsf_command;
 753                 req->seq_no = adapter->fsf_req_seq_no;
 754                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 755                 sbale[1].addr = (void *) req->qtcb;
 756                 sbale[1].length = sizeof(struct fsf_qtcb);
 757         }
 758
 759         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
 760                 zfcp_fsf_req_free(req);
 761                 return ERR_PTR(-EIO);
 762         }
 763
 764         if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
 765                 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 766
 767         return req;
 768 }
 769
 770 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 771 {
 772         struct zfcp_adapter *adapter = req->adapter;
 773         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 774         unsigned long flags;
 775         int idx;
 776
 777         /* put allocated FSF request into hash table */
 778         spin_lock_irqsave(&adapter->req_list_lock, flags);
 779         idx = zfcp_reqlist_hash(req->req_id);
 780         list_add_tail(&req->list, &adapter->req_list[idx]);
 781         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 782
 783         req->qdio_outb_usage = atomic_read(&req_q->count);
 784         req->issued = get_clock();
 785         if (zfcp_qdio_send(req)) {
 786                 /* Queues are down..... */
 787                 del_timer(&req->timer);
 788                 spin_lock(&adapter->req_list_lock);
 789                 zfcp_reqlist_remove(adapter, req);
 790                 spin_unlock(&adapter->req_list_lock);
 791                 /* undo changes in request queue made for this request */
 792                 atomic_add(req->sbal_number, &req_q->count);
 793                 req_q->first -= req->sbal_number;
 794                 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
 795                 req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
 796                 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
 797                 return -EIO;
 798         }
 799
 800         /* Don't increase for unsolicited status */
 801         if (req->qtcb)
 802                 adapter->fsf_req_seq_no++;
 803
 804         return 0;
 805 }
 806
 807 /**
 808  * zfcp_fsf_status_read - send status read request
 809  * @adapter: pointer to struct zfcp_adapter
 810  * @req_flags: request flags
 811  * Returns: 0 on success, ERROR otherwise
 812  */
 813 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
 814 {
 815         struct zfcp_fsf_req *req;
 816         struct fsf_status_read_buffer *sr_buf;
 817         struct qdio_buffer_element *sbale;
 818         int retval = -EIO;
 819
 820         spin_lock_bh(&adapter->req_q_lock);
 821         if (zfcp_fsf_req_sbal_get(adapter))
 822                 goto out;
 823
 824         req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 825                                   ZFCP_REQ_NO_QTCB,
 826                                   adapter->pool.fsf_req_status_read);
 827         if (IS_ERR(req)) {
 828                 retval = PTR_ERR(req);
 829                 goto out;
 830         }
 831
 832         sbale = zfcp_qdio_sbale_req(req);
 833         sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
 834         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 835         req->sbale_curr = 2;
 836
 837         sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
 838         if (!sr_buf) {
 839                 retval = -ENOMEM;
 840                 goto failed_buf;
 841         }
 842         memset(sr_buf, 0, sizeof(*sr_buf));
 843         req->data = sr_buf;
 844         sbale = zfcp_qdio_sbale_curr(req);
 845         sbale->addr = (void *) sr_buf;
 846         sbale->length = sizeof(*sr_buf);
 847
 848         retval = zfcp_fsf_req_send(req);
 849         if (retval)
 850                 goto failed_req_send;
 851
 852         goto out;
 853
 854 failed_req_send:
 855         mempool_free(sr_buf, adapter->pool.data_status_read);
 856 failed_buf:
 857         zfcp_fsf_req_free(req);
 858         zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 859 out:
 860         spin_unlock_bh(&adapter->req_q_lock);
 861         return retval;
 862 }
 863
 864 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 865 {
 866         struct zfcp_unit *unit = req->data;
 867         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 868
 869         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 870                 return;
 871
 872         switch (req->qtcb->header.fsf_status) {
 873         case FSF_PORT_HANDLE_NOT_VALID:
 874                 if (fsq->word[0] == fsq->word[1]) {
 875                         zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
 876                                                 req);
 877                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 878                 }
 879                 break;
 880         case FSF_LUN_HANDLE_NOT_VALID:
 881                 if (fsq->word[0] == fsq->word[1]) {
 882                         zfcp_erp_port_reopen(unit->port, 0, 105, req);
 883                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 884                 }
 885                 break;
 886         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 887                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 888                 break;
 889         case FSF_PORT_BOXED:
 890                 zfcp_erp_port_boxed(unit->port, 47, req);
 891                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 892                                ZFCP_STATUS_FSFREQ_RETRY;
 893                 break;
 894         case FSF_LUN_BOXED:
 895                 zfcp_erp_unit_boxed(unit, 48, req);
 896                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 897                                ZFCP_STATUS_FSFREQ_RETRY;
 898                 break;
 899         case FSF_ADAPTER_STATUS_AVAILABLE:
 900                 switch (fsq->word[0]) {
 901                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 902                         zfcp_test_link(unit->port);
 903                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 904                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 905                         break;
 906                 }
 907                 break;
 908         case FSF_GOOD:
 909                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 910                 break;
 911         }
 912 }
 913
 914 /**
 915  * zfcp_fsf_abort_fcp_command - abort running SCSI command
 916  * @old_req_id: unsigned long
 917  * @adapter: pointer to struct zfcp_adapter
 918  * @unit: pointer to struct zfcp_unit
 919  * @req_flags: integer specifying the request flags
 920  * Returns: pointer to struct zfcp_fsf_req
 921  *
 922  * FIXME(design): should be watched by a timeout !!!
 923  */
 924
 925 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 926                                                 struct zfcp_adapter *adapter,
 927                                                 struct zfcp_unit *unit,
 928                                                 int req_flags)
 929 {
 930         struct qdio_buffer_element *sbale;
 931         struct zfcp_fsf_req *req = NULL;
 932
 933         spin_lock(&adapter->req_q_lock);
 934         if (!zfcp_fsf_sbal_available(adapter))
 935                 goto out;
 936         req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
 937                                   req_flags, adapter->pool.fsf_req_abort);
 938         if (IS_ERR(req))
 939                 goto out;
 940
 941         if (unlikely(!(atomic_read(&unit->status) &
 942                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 943                 goto out_error_free;
 944
 945         sbale = zfcp_qdio_sbale_req(req);
 946         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 947         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 948
 949         req->data = unit;
 950         req->handler = zfcp_fsf_abort_fcp_command_handler;
 951         req->qtcb->header.lun_handle = unit->handle;
 952         req->qtcb->header.port_handle = unit->port->handle;
 953         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 954
 955         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 956         if (!zfcp_fsf_req_send(req))
 957                 goto out;
 958
 959 out_error_free:
 960         zfcp_fsf_req_free(req);
 961         req = NULL;
 962 out:
 963         spin_unlock(&adapter->req_q_lock);
 964         return req;
 965 }
 966
 967 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 968 {
 969         struct zfcp_adapter *adapter = req->adapter;
 970         struct zfcp_send_ct *send_ct = req->data;
 971         struct fsf_qtcb_header *header = &req->qtcb->header;
 972
 973         send_ct->status = -EINVAL;
 974
 975         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 976                 goto skip_fsfstatus;
 977
 978         switch (header->fsf_status) {
 979         case FSF_GOOD:
 980                 zfcp_san_dbf_event_ct_response(req);
 981                 send_ct->status = 0;
 982                 break;
 983         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 984                 zfcp_fsf_class_not_supp(req);
 985                 break;
 986         case FSF_ADAPTER_STATUS_AVAILABLE:
 987                 switch (header->fsf_status_qual.word[0]){
 988                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 989                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 990                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 991                         break;
 992                 }
 993                 break;
 994         case FSF_ACCESS_DENIED:
 995                 break;
 996         case FSF_PORT_BOXED:
 997                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 998                                ZFCP_STATUS_FSFREQ_RETRY;
 999                 break;
1000         case FSF_PORT_HANDLE_NOT_VALID:
1001                 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
1002         case FSF_GENERIC_COMMAND_REJECTED:
1003         case FSF_PAYLOAD_SIZE_MISMATCH:
1004         case FSF_REQUEST_SIZE_TOO_LARGE:
1005         case FSF_RESPONSE_SIZE_TOO_LARGE:
1006         case FSF_SBAL_MISMATCH:
1007                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1008                 break;
1009         }
1010
1011 skip_fsfstatus:
1012         if (send_ct->handler)
1013                 send_ct->handler(send_ct->handler_data);
1014 }
1015
1016 static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1017                                 struct scatterlist *sg_req,
1018                                 struct scatterlist *sg_resp, int max_sbals)
1019 {
1020         int bytes;
1021
1022         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1023                                         sg_req, max_sbals);
1024         if (bytes <= 0)
1025                 return -ENOMEM;
1026         req->qtcb->bottom.support.req_buf_length = bytes;
1027         req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1028
1029         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1030                                         sg_resp, max_sbals);
1031         if (bytes <= 0)
1032                 return -ENOMEM;
1033         req->qtcb->bottom.support.resp_buf_length = bytes;
1034
1035         return 0;
1036 }
1037
1038 /**
1039  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1040  * @ct: pointer to struct zfcp_send_ct with data for request
1041  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1042  * @erp_action: if non-null the Generic Service request sent within ERP
1043  */
1044 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1045                      struct zfcp_erp_action *erp_action)
1046 {
1047         struct zfcp_wka_port *wka_port = ct->wka_port;
1048         struct zfcp_adapter *adapter = wka_port->adapter;
1049         struct zfcp_fsf_req *req;
1050         int ret = -EIO;
1051
1052         spin_lock_bh(&adapter->req_q_lock);
1053         if (zfcp_fsf_req_sbal_get(adapter))
1054                 goto out;
1055
1056         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1057                                   ZFCP_REQ_AUTO_CLEANUP, pool);
1058         if (IS_ERR(req)) {
1059                 ret = PTR_ERR(req);
1060                 goto out;
1061         }
1062
1063         ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1064                                    FSF_MAX_SBALS_PER_REQ);
1065         if (ret)
1066                 goto failed_send;
1067
1068         req->handler = zfcp_fsf_send_ct_handler;
1069         req->qtcb->header.port_handle = wka_port->handle;
1070         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1071         req->qtcb->bottom.support.timeout = ct->timeout;
1072         req->data = ct;
1073
1074         zfcp_san_dbf_event_ct_request(req);
1075
1076         if (erp_action) {
1077                 erp_action->fsf_req = req;
1078                 req->erp_action = erp_action;
1079                 zfcp_fsf_start_erp_timer(req);
1080         } else
1081                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1082
1083         ret = zfcp_fsf_req_send(req);
1084         if (ret)
1085                 goto failed_send;
1086
1087         goto out;
1088
1089 failed_send:
1090         zfcp_fsf_req_free(req);
1091         if (erp_action)
1092                 erp_action->fsf_req = NULL;
1093 out:
1094         spin_unlock_bh(&adapter->req_q_lock);
1095         return ret;
1096 }
1097
1098 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1099 {
1100         struct zfcp_send_els *send_els = req->data;
1101         struct zfcp_port *port = send_els->port;
1102         struct fsf_qtcb_header *header = &req->qtcb->header;
1103
1104         send_els->status = -EINVAL;
1105
1106         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1107                 goto skip_fsfstatus;
1108
1109         switch (header->fsf_status) {
1110         case FSF_GOOD:
1111                 zfcp_san_dbf_event_els_response(req);
1112                 send_els->status = 0;
1113                 break;
1114         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1115                 zfcp_fsf_class_not_supp(req);
1116                 break;
1117         case FSF_ADAPTER_STATUS_AVAILABLE:
1118                 switch (header->fsf_status_qual.word[0]){
1119                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1120                         if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1121                                 zfcp_test_link(port);
1122                         /*fall through */
1123                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1124                 case FSF_SQ_RETRY_IF_POSSIBLE:
1125                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1126                         break;
1127                 }
1128                 break;
1129         case FSF_ELS_COMMAND_REJECTED:
1130         case FSF_PAYLOAD_SIZE_MISMATCH:
1131         case FSF_REQUEST_SIZE_TOO_LARGE:
1132         case FSF_RESPONSE_SIZE_TOO_LARGE:
1133                 break;
1134         case FSF_ACCESS_DENIED:
1135                 zfcp_fsf_access_denied_port(req, port);
1136                 break;
1137         case FSF_SBAL_MISMATCH:
1138                 /* should never occure, avoided in zfcp_fsf_send_els */
1139                 /* fall through */
1140         default:
1141                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1142                 break;
1143         }
1144 skip_fsfstatus:
1145         if (send_els->handler)
1146                 send_els->handler(send_els->handler_data);
1147 }
1148
1149 /**
1150  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1151  * @els: pointer to struct zfcp_send_els with data for the command
1152  */
1153 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1154 {
1155         struct zfcp_fsf_req *req;
1156         struct zfcp_adapter *adapter = els->adapter;
1157         struct fsf_qtcb_bottom_support *bottom;
1158         int ret = -EIO;
1159
1160         if (unlikely(!(atomic_read(&els->port->status) &
1161                        ZFCP_STATUS_COMMON_UNBLOCKED)))
1162                 return -EBUSY;
1163
1164         spin_lock(&adapter->req_q_lock);
1165         if (!zfcp_fsf_sbal_available(adapter))
1166                 goto out;
1167         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1168                                   ZFCP_REQ_AUTO_CLEANUP, NULL);
1169         if (IS_ERR(req)) {
1170                 ret = PTR_ERR(req);
1171                 goto out;
1172         }
1173
1174         ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1175
1176         if (ret)
1177                 goto failed_send;
1178
1179         bottom = &req->qtcb->bottom.support;
1180         req->handler = zfcp_fsf_send_els_handler;
1181         bottom->d_id = els->d_id;
1182         bottom->service_class = FSF_CLASS_3;
1183         bottom->timeout = 2 * R_A_TOV;
1184         req->data = els;
1185
1186         zfcp_san_dbf_event_els_request(req);
1187
1188         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1189         ret = zfcp_fsf_req_send(req);
1190         if (ret)
1191                 goto failed_send;
1192
1193         goto out;
1194
1195 failed_send:
1196         zfcp_fsf_req_free(req);
1197 out:
1198         spin_unlock(&adapter->req_q_lock);
1199         return ret;
1200 }
1201
1202 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1203 {
1204         struct qdio_buffer_element *sbale;
1205         struct zfcp_fsf_req *req;
1206         struct zfcp_adapter *adapter = erp_action->adapter;
1207         int retval = -EIO;
1208
1209         spin_lock_bh(&adapter->req_q_lock);
1210         if (!zfcp_fsf_sbal_available(adapter))
1211                 goto out;
1212         req = zfcp_fsf_req_create(adapter,
1213                                   FSF_QTCB_EXCHANGE_CONFIG_DATA,
1214                                   ZFCP_REQ_AUTO_CLEANUP,
1215                                   adapter->pool.fsf_req_erp);
1216         if (IS_ERR(req)) {
1217                 retval = PTR_ERR(req);
1218                 goto out;
1219         }
1220
1221         sbale = zfcp_qdio_sbale_req(req);
1222         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1223         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1224
1225         req->qtcb->bottom.config.feature_selection =
1226                         FSF_FEATURE_CFDC |
1227                         FSF_FEATURE_LUN_SHARING |
1228                         FSF_FEATURE_NOTIFICATION_LOST |
1229                         FSF_FEATURE_UPDATE_ALERT;
1230         req->erp_action = erp_action;
1231         req->handler = zfcp_fsf_exchange_config_data_handler;
1232         erp_action->fsf_req = req;
1233
1234         zfcp_fsf_start_erp_timer(req);
1235         retval = zfcp_fsf_req_send(req);
1236         if (retval) {
1237                 zfcp_fsf_req_free(req);
1238                 erp_action->fsf_req = NULL;
1239         }
1240 out:
1241         spin_unlock_bh(&adapter->req_q_lock);
1242         return retval;
1243 }
1244
1245 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1246                                        struct fsf_qtcb_bottom_config *data)
1247 {
1248         struct qdio_buffer_element *sbale;
1249         struct zfcp_fsf_req *req = NULL;
1250         int retval = -EIO;
1251
1252         spin_lock_bh(&adapter->req_q_lock);
1253         if (zfcp_fsf_req_sbal_get(adapter))
1254                 goto out;
1255
1256         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1257                                   0, NULL);
1258         if (IS_ERR(req)) {
1259                 retval = PTR_ERR(req);
1260                 goto out;
1261         }
1262
1263         sbale = zfcp_qdio_sbale_req(req);
1264         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1265         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1266         req->handler = zfcp_fsf_exchange_config_data_handler;
1267
1268         req->qtcb->bottom.config.feature_selection =
1269                         FSF_FEATURE_CFDC |
1270                         FSF_FEATURE_LUN_SHARING |
1271                         FSF_FEATURE_NOTIFICATION_LOST |
1272                         FSF_FEATURE_UPDATE_ALERT;
1273
1274         if (data)
1275                 req->data = data;
1276
1277         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1278         retval = zfcp_fsf_req_send(req);
1279 out:
1280         spin_unlock_bh(&adapter->req_q_lock);
1281         if (!retval)
1282                 wait_event(req->completion_wq,
1283                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1284
1285         zfcp_fsf_req_free(req);
1286
1287         return retval;
1288 }
1289
1290 /**
1291  * zfcp_fsf_exchange_port_data - request information about local port
1292  * @erp_action: ERP action for the adapter for which port data is requested
1293  * Returns: 0 on success, error otherwise
1294  */
1295 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1296 {
1297         struct qdio_buffer_element *sbale;
1298         struct zfcp_fsf_req *req;
1299         struct zfcp_adapter *adapter = erp_action->adapter;
1300         int retval = -EIO;
1301
1302         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1303                 return -EOPNOTSUPP;
1304
1305         spin_lock_bh(&adapter->req_q_lock);
1306         if (!zfcp_fsf_sbal_available(adapter))
1307                 goto out;
1308         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1309                                   ZFCP_REQ_AUTO_CLEANUP,
1310                                   adapter->pool.fsf_req_erp);
1311         if (IS_ERR(req)) {
1312                 retval = PTR_ERR(req);
1313                 goto out;
1314         }
1315
1316         sbale = zfcp_qdio_sbale_req(req);
1317         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1318         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1319
1320         req->handler = zfcp_fsf_exchange_port_data_handler;
1321         req->erp_action = erp_action;
1322         erp_action->fsf_req = req;
1323
1324         zfcp_fsf_start_erp_timer(req);
1325         retval = zfcp_fsf_req_send(req);
1326         if (retval) {
1327                 zfcp_fsf_req_free(req);
1328                 erp_action->fsf_req = NULL;
1329         }
1330 out:
1331         spin_unlock_bh(&adapter->req_q_lock);
1332         return retval;
1333 }
1334
1335 /**
1336  * zfcp_fsf_exchange_port_data_sync - request information about local port
1337  * @adapter: pointer to struct zfcp_adapter
1338  * @data: pointer to struct fsf_qtcb_bottom_port
1339  * Returns: 0 on success, error otherwise
1340  */
1341 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1342                                      struct fsf_qtcb_bottom_port *data)
1343 {
1344         struct qdio_buffer_element *sbale;
1345         struct zfcp_fsf_req *req = NULL;
1346         int retval = -EIO;
1347
1348         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1349                 return -EOPNOTSUPP;
1350
1351         spin_lock_bh(&adapter->req_q_lock);
1352         if (!zfcp_fsf_sbal_available(adapter))
1353                 goto out;
1354
1355         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1356                                   NULL);
1357         if (IS_ERR(req)) {
1358                 retval = PTR_ERR(req);
1359                 goto out;
1360         }
1361
1362         if (data)
1363                 req->data = data;
1364
1365         sbale = zfcp_qdio_sbale_req(req);
1366         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1367         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1368
1369         req->handler = zfcp_fsf_exchange_port_data_handler;
1370         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1371         retval = zfcp_fsf_req_send(req);
1372 out:
1373         spin_unlock_bh(&adapter->req_q_lock);
1374         if (!retval)
1375                 wait_event(req->completion_wq,
1376                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1377         zfcp_fsf_req_free(req);
1378
1379         return retval;
1380 }
1381
1382 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1383 {
1384         struct zfcp_port *port = req->data;
1385         struct fsf_qtcb_header *header = &req->qtcb->header;
1386         struct fsf_plogi *plogi;
1387
1388         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1389                 return;
1390
1391         switch (header->fsf_status) {
1392         case FSF_PORT_ALREADY_OPEN:
1393                 break;
1394         case FSF_ACCESS_DENIED:
1395                 zfcp_fsf_access_denied_port(req, port);
1396                 break;
1397         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1398                 dev_warn(&req->adapter->ccw_device->dev,
1399                          "Not enough FCP adapter resources to open "
1400                          "remote port 0x%016Lx\n",
1401                          (unsigned long long)port->wwpn);
1402                 zfcp_erp_port_failed(port, 31, req);
1403                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1404                 break;
1405         case FSF_ADAPTER_STATUS_AVAILABLE:
1406                 switch (header->fsf_status_qual.word[0]) {
1407                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1408                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1409                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1410                         break;
1411                 case FSF_SQ_NO_RETRY_POSSIBLE:
1412                         dev_warn(&req->adapter->ccw_device->dev,
1413                                  "Remote port 0x%016Lx could not be opened\n",
1414                                  (unsigned long long)port->wwpn);
1415                         zfcp_erp_port_failed(port, 32, req);
1416                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1417                         break;
1418                 }
1419                 break;
1420         case FSF_GOOD:
1421                 port->handle = header->port_handle;
1422                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1423                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1424                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1425                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1426                                   &port->status);
1427                 /* check whether D_ID has changed during open */
1428                 /*
1429                  * FIXME: This check is not airtight, as the FCP channel does
1430                  * not monitor closures of target port connections caused on
1431                  * the remote side. Thus, they might miss out on invalidating
1432                  * locally cached WWPNs (and other N_Port parameters) of gone
1433                  * target ports. So, our heroic attempt to make things safe
1434                  * could be undermined by 'open port' response data tagged with
1435                  * obsolete WWPNs. Another reason to monitor potential
1436                  * connection closures ourself at least (by interpreting
1437                  * incoming ELS' and unsolicited status). It just crosses my
1438                  * mind that one should be able to cross-check by means of
1439                  * another GID_PN straight after a port has been opened.
1440                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1441                  */
1442                 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1443                 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1444                         if (plogi->serv_param.wwpn != port->wwpn)
1445                                 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1446                                                   &port->status);
1447                         else {
1448                                 port->wwnn = plogi->serv_param.wwnn;
1449                                 zfcp_fc_plogi_evaluate(port, plogi);
1450                         }
1451                 }
1452                 break;
1453         case FSF_UNKNOWN_OP_SUBTYPE:
1454                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1455                 break;
1456         }
1457 }
1458
1459 /**
1460  * zfcp_fsf_open_port - create and send open port request
1461  * @erp_action: pointer to struct zfcp_erp_action
1462  * Returns: 0 on success, error otherwise
1463  */
1464 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1465 {
1466         struct qdio_buffer_element *sbale;
1467         struct zfcp_adapter *adapter = erp_action->adapter;
1468         struct zfcp_fsf_req *req;
1469         int retval = -EIO;
1470
1471         spin_lock_bh(&adapter->req_q_lock);
1472         if (zfcp_fsf_req_sbal_get(adapter))
1473                 goto out;
1474
1475         req = zfcp_fsf_req_create(adapter,
1476                                   FSF_QTCB_OPEN_PORT_WITH_DID,
1477                                   ZFCP_REQ_AUTO_CLEANUP,
1478                                   adapter->pool.fsf_req_erp);
1479         if (IS_ERR(req)) {
1480                 retval = PTR_ERR(req);
1481                 goto out;
1482         }
1483
1484         sbale = zfcp_qdio_sbale_req(req);
1485         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1486         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1487
1488         req->handler = zfcp_fsf_open_port_handler;
1489         req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1490         req->data = erp_action->port;
1491         req->erp_action = erp_action;
1492         erp_action->fsf_req = req;
1493
1494         zfcp_fsf_start_erp_timer(req);
1495         retval = zfcp_fsf_req_send(req);
1496         if (retval) {
1497                 zfcp_fsf_req_free(req);
1498                 erp_action->fsf_req = NULL;
1499         }
1500 out:
1501         spin_unlock_bh(&adapter->req_q_lock);
1502         return retval;
1503 }
1504
1505 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1506 {
1507         struct zfcp_port *port = req->data;
1508
1509         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1510                 return;
1511
1512         switch (req->qtcb->header.fsf_status) {
1513         case FSF_PORT_HANDLE_NOT_VALID:
1514                 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1515                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1516                 break;
1517         case FSF_ADAPTER_STATUS_AVAILABLE:
1518                 break;
1519         case FSF_GOOD:
1520                 zfcp_erp_modify_port_status(port, 33, req,
1521                                             ZFCP_STATUS_COMMON_OPEN,
1522                                             ZFCP_CLEAR);
1523                 break;
1524         }
1525 }
1526
1527 /**
1528  * zfcp_fsf_close_port - create and send close port request
1529  * @erp_action: pointer to struct zfcp_erp_action
1530  * Returns: 0 on success, error otherwise
1531  */
1532 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1533 {
1534         struct qdio_buffer_element *sbale;
1535         struct zfcp_adapter *adapter = erp_action->adapter;
1536         struct zfcp_fsf_req *req;
1537         int retval = -EIO;
1538
1539         spin_lock_bh(&adapter->req_q_lock);
1540         if (zfcp_fsf_req_sbal_get(adapter))
1541                 goto out;
1542
1543         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1544                                   ZFCP_REQ_AUTO_CLEANUP,
1545                                   adapter->pool.fsf_req_erp);
1546         if (IS_ERR(req)) {
1547                 retval = PTR_ERR(req);
1548                 goto out;
1549         }
1550
1551         sbale = zfcp_qdio_sbale_req(req);
1552         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1553         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1554
1555         req->handler = zfcp_fsf_close_port_handler;
1556         req->data = erp_action->port;
1557         req->erp_action = erp_action;
1558         req->qtcb->header.port_handle = erp_action->port->handle;
1559         erp_action->fsf_req = req;
1560
1561         zfcp_fsf_start_erp_timer(req);
1562         retval = zfcp_fsf_req_send(req);
1563         if (retval) {
1564                 zfcp_fsf_req_free(req);
1565                 erp_action->fsf_req = NULL;
1566         }
1567 out:
1568         spin_unlock_bh(&adapter->req_q_lock);
1569         return retval;
1570 }
1571
1572 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1573 {
1574         struct zfcp_wka_port *wka_port = req->data;
1575         struct fsf_qtcb_header *header = &req->qtcb->header;
1576
1577         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1578                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1579                 goto out;
1580         }
1581
1582         switch (header->fsf_status) {
1583         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1584                 dev_warn(&req->adapter->ccw_device->dev,
1585                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1586         case FSF_ADAPTER_STATUS_AVAILABLE:
1587                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1588         case FSF_ACCESS_DENIED:
1589                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1590                 break;
1591         case FSF_PORT_ALREADY_OPEN:
1592         case FSF_GOOD:
1593                 wka_port->handle = header->port_handle;
1594                 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1595         }
1596 out:
1597         wake_up(&wka_port->completion_wq);
1598 }
1599
1600 /**
1601  * zfcp_fsf_open_wka_port - create and send open wka-port request
1602  * @wka_port: pointer to struct zfcp_wka_port
1603  * Returns: 0 on success, error otherwise
1604  */
1605 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1606 {
1607         struct qdio_buffer_element *sbale;
1608         struct zfcp_adapter *adapter = wka_port->adapter;
1609         struct zfcp_fsf_req *req;
1610         int retval = -EIO;
1611
1612         spin_lock_bh(&adapter->req_q_lock);
1613         if (zfcp_fsf_req_sbal_get(adapter))
1614                 goto out;
1615
1616         req = zfcp_fsf_req_create(adapter,
1617                                   FSF_QTCB_OPEN_PORT_WITH_DID,
1618                                   ZFCP_REQ_AUTO_CLEANUP,
1619                                   adapter->pool.fsf_req_erp);
1620         if (unlikely(IS_ERR(req))) {
1621                 retval = PTR_ERR(req);
1622                 goto out;
1623         }
1624
1625         sbale = zfcp_qdio_sbale_req(req);
1626         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1627         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1628
1629         req->handler = zfcp_fsf_open_wka_port_handler;
1630         req->qtcb->bottom.support.d_id = wka_port->d_id;
1631         req->data = wka_port;
1632
1633         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1634         retval = zfcp_fsf_req_send(req);
1635         if (retval)
1636                 zfcp_fsf_req_free(req);
1637 out:
1638         spin_unlock_bh(&adapter->req_q_lock);
1639         return retval;
1640 }
1641
1642 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1643 {
1644         struct zfcp_wka_port *wka_port = req->data;
1645
1646         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1647                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1648                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
1649         }
1650
1651         wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1652         wake_up(&wka_port->completion_wq);
1653 }
1654
1655 /**
1656  * zfcp_fsf_close_wka_port - create and send close wka port request
1657  * @erp_action: pointer to struct zfcp_erp_action
1658  * Returns: 0 on success, error otherwise
1659  */
1660 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1661 {
1662         struct qdio_buffer_element *sbale;
1663         struct zfcp_adapter *adapter = wka_port->adapter;
1664         struct zfcp_fsf_req *req;
1665         int retval = -EIO;
1666
1667         spin_lock_bh(&adapter->req_q_lock);
1668         if (zfcp_fsf_req_sbal_get(adapter))
1669                 goto out;
1670
1671         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1672                                   ZFCP_REQ_AUTO_CLEANUP,
1673                                   adapter->pool.fsf_req_erp);
1674         if (unlikely(IS_ERR(req))) {
1675                 retval = PTR_ERR(req);
1676                 goto out;
1677         }
1678
1679         sbale = zfcp_qdio_sbale_req(req);
1680         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1681         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1682
1683         req->handler = zfcp_fsf_close_wka_port_handler;
1684         req->data = wka_port;
1685         req->qtcb->header.port_handle = wka_port->handle;
1686
1687         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1688         retval = zfcp_fsf_req_send(req);
1689         if (retval)
1690                 zfcp_fsf_req_free(req);
1691 out:
1692         spin_unlock_bh(&adapter->req_q_lock);
1693         return retval;
1694 }
1695
1696 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1697 {
1698         struct zfcp_port *port = req->data;
1699         struct fsf_qtcb_header *header = &req->qtcb->header;
1700         struct zfcp_unit *unit;
1701
1702         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1703                 goto skip_fsfstatus;
1704
1705         switch (header->fsf_status) {
1706         case FSF_PORT_HANDLE_NOT_VALID:
1707                 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1708                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1709                 break;
1710         case FSF_ACCESS_DENIED:
1711                 zfcp_fsf_access_denied_port(req, port);
1712                 break;
1713         case FSF_PORT_BOXED:
1714                 zfcp_erp_port_boxed(port, 50, req);
1715                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1716                                ZFCP_STATUS_FSFREQ_RETRY;
1717                 /* can't use generic zfcp_erp_modify_port_status because
1718                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1719                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1720                 list_for_each_entry(unit, &port->unit_list_head, list)
1721                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1722                                           &unit->status);
1723                 break;
1724         case FSF_ADAPTER_STATUS_AVAILABLE:
1725                 switch (header->fsf_status_qual.word[0]) {
1726                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1727                         /* fall through */
1728                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1729                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1730                         break;
1731                 }
1732                 break;
1733         case FSF_GOOD:
1734                 /* can't use generic zfcp_erp_modify_port_status because
1735                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1736                  */
1737                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1738                 list_for_each_entry(unit, &port->unit_list_head, list)
1739                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1740                                           &unit->status);
1741                 break;
1742         }
1743 skip_fsfstatus:
1744         atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1745 }
1746
1747 /**
1748  * zfcp_fsf_close_physical_port - close physical port
1749  * @erp_action: pointer to struct zfcp_erp_action
1750  * Returns: 0 on success
1751  */
1752 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1753 {
1754         struct qdio_buffer_element *sbale;
1755         struct zfcp_adapter *adapter = erp_action->adapter;
1756         struct zfcp_fsf_req *req;
1757         int retval = -EIO;
1758
1759         spin_lock_bh(&adapter->req_q_lock);
1760         if (zfcp_fsf_req_sbal_get(adapter))
1761                 goto out;
1762
1763         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1764                                   ZFCP_REQ_AUTO_CLEANUP,
1765                                   adapter->pool.fsf_req_erp);
1766         if (IS_ERR(req)) {
1767                 retval = PTR_ERR(req);
1768                 goto out;
1769         }
1770
1771         sbale = zfcp_qdio_sbale_req(req);
1772         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1773         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1774
1775         req->data = erp_action->port;
1776         req->qtcb->header.port_handle = erp_action->port->handle;
1777         req->erp_action = erp_action;
1778         req->handler = zfcp_fsf_close_physical_port_handler;
1779         erp_action->fsf_req = req;
1780         atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1781                         &erp_action->port->status);
1782
1783         zfcp_fsf_start_erp_timer(req);
1784         retval = zfcp_fsf_req_send(req);
1785         if (retval) {
1786                 zfcp_fsf_req_free(req);
1787                 erp_action->fsf_req = NULL;
1788         }
1789 out:
1790         spin_unlock_bh(&adapter->req_q_lock);
1791         return retval;
1792 }
1793
1794 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1795 {
1796         struct zfcp_adapter *adapter = req->adapter;
1797         struct zfcp_unit *unit = req->data;
1798         struct fsf_qtcb_header *header = &req->qtcb->header;
1799         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1800         struct fsf_queue_designator *queue_designator =
1801                                 &header->fsf_status_qual.fsf_queue_designator;
1802         int exclusive, readwrite;
1803
1804         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1805                 return;
1806
1807         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1808                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1809                           ZFCP_STATUS_UNIT_SHARED |
1810                           ZFCP_STATUS_UNIT_READONLY,
1811                           &unit->status);
1812
1813         switch (header->fsf_status) {
1814
1815         case FSF_PORT_HANDLE_NOT_VALID:
1816                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1817                 /* fall through */
1818         case FSF_LUN_ALREADY_OPEN:
1819                 break;
1820         case FSF_ACCESS_DENIED:
1821                 zfcp_fsf_access_denied_unit(req, unit);
1822                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1823                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1824                 break;
1825         case FSF_PORT_BOXED:
1826                 zfcp_erp_port_boxed(unit->port, 51, req);
1827                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1828                                ZFCP_STATUS_FSFREQ_RETRY;
1829                 break;
1830         case FSF_LUN_SHARING_VIOLATION:
1831                 if (header->fsf_status_qual.word[0])
1832                         dev_warn(&adapter->ccw_device->dev,
1833                                  "LUN 0x%Lx on port 0x%Lx is already in "
1834                                  "use by CSS%d, MIF Image ID %x\n",
1835                                  (unsigned long long)unit->fcp_lun,
1836                                  (unsigned long long)unit->port->wwpn,
1837                                  queue_designator->cssid,
1838                                  queue_designator->hla);
1839                 else
1840                         zfcp_act_eval_err(adapter,
1841                                           header->fsf_status_qual.word[2]);
1842                 zfcp_erp_unit_access_denied(unit, 60, req);
1843                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1844                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1845                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1846                 break;
1847         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1848                 dev_warn(&adapter->ccw_device->dev,
1849                          "No handle is available for LUN "
1850                          "0x%016Lx on port 0x%016Lx\n",
1851                          (unsigned long long)unit->fcp_lun,
1852                          (unsigned long long)unit->port->wwpn);
1853                 zfcp_erp_unit_failed(unit, 34, req);
1854                 /* fall through */
1855         case FSF_INVALID_COMMAND_OPTION:
1856                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1857                 break;
1858         case FSF_ADAPTER_STATUS_AVAILABLE:
1859                 switch (header->fsf_status_qual.word[0]) {
1860                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1861                         zfcp_test_link(unit->port);
1862                         /* fall through */
1863                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1864                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1865                         break;
1866                 }
1867                 break;
1868
1869         case FSF_GOOD:
1870                 unit->handle = header->lun_handle;
1871                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1872
1873                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1874                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1875                     (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1876                         exclusive = (bottom->lun_access_info &
1877                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1878                         readwrite = (bottom->lun_access_info &
1879                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1880
1881                         if (!exclusive)
1882                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1883                                                 &unit->status);
1884
1885                         if (!readwrite) {
1886                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1887                                                 &unit->status);
1888                                 dev_info(&adapter->ccw_device->dev,
1889                                          "SCSI device at LUN 0x%016Lx on port "
1890                                          "0x%016Lx opened read-only\n",
1891                                          (unsigned long long)unit->fcp_lun,
1892                                          (unsigned long long)unit->port->wwpn);
1893                         }
1894
1895                         if (exclusive && !readwrite) {
1896                                 dev_err(&adapter->ccw_device->dev,
1897                                         "Exclusive read-only access not "
1898                                         "supported (unit 0x%016Lx, "
1899                                         "port 0x%016Lx)\n",
1900                                         (unsigned long long)unit->fcp_lun,
1901                                         (unsigned long long)unit->port->wwpn);
1902                                 zfcp_erp_unit_failed(unit, 35, req);
1903                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1904                                 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1905                         } else if (!exclusive && readwrite) {
1906                                 dev_err(&adapter->ccw_device->dev,
1907                                         "Shared read-write access not "
1908                                         "supported (unit 0x%016Lx, port "
1909                                         "0x%016Lx\n)",
1910                                         (unsigned long long)unit->fcp_lun,
1911                                         (unsigned long long)unit->port->wwpn);
1912                                 zfcp_erp_unit_failed(unit, 36, req);
1913                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1914                                 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1915                         }
1916                 }
1917                 break;
1918         }
1919 }
1920
1921 /**
1922  * zfcp_fsf_open_unit - open unit
1923  * @erp_action: pointer to struct zfcp_erp_action
1924  * Returns: 0 on success, error otherwise
1925  */
1926 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1927 {
1928         struct qdio_buffer_element *sbale;
1929         struct zfcp_adapter *adapter = erp_action->adapter;
1930         struct zfcp_fsf_req *req;
1931         int retval = -EIO;
1932
1933         spin_lock_bh(&adapter->req_q_lock);
1934         if (zfcp_fsf_req_sbal_get(adapter))
1935                 goto out;
1936
1937         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1938                                   ZFCP_REQ_AUTO_CLEANUP,
1939                                   adapter->pool.fsf_req_erp);
1940         if (IS_ERR(req)) {
1941                 retval = PTR_ERR(req);
1942                 goto out;
1943         }
1944
1945         sbale = zfcp_qdio_sbale_req(req);
1946         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1947         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1948
1949         req->qtcb->header.port_handle = erp_action->port->handle;
1950         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1951         req->handler = zfcp_fsf_open_unit_handler;
1952         req->data = erp_action->unit;
1953         req->erp_action = erp_action;
1954         erp_action->fsf_req = req;
1955
1956         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1957                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1958
1959         zfcp_fsf_start_erp_timer(req);
1960         retval = zfcp_fsf_req_send(req);
1961         if (retval) {
1962                 zfcp_fsf_req_free(req);
1963                 erp_action->fsf_req = NULL;
1964         }
1965 out:
1966         spin_unlock_bh(&adapter->req_q_lock);
1967         return retval;
1968 }
1969
1970 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1971 {
1972         struct zfcp_unit *unit = req->data;
1973
1974         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1975                 return;
1976
1977         switch (req->qtcb->header.fsf_status) {
1978         case FSF_PORT_HANDLE_NOT_VALID:
1979                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1980                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1981                 break;
1982         case FSF_LUN_HANDLE_NOT_VALID:
1983                 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1984                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1985                 break;
1986         case FSF_PORT_BOXED:
1987                 zfcp_erp_port_boxed(unit->port, 52, req);
1988                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1989                                ZFCP_STATUS_FSFREQ_RETRY;
1990                 break;
1991         case FSF_ADAPTER_STATUS_AVAILABLE:
1992                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1993                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1994                         zfcp_test_link(unit->port);
1995                         /* fall through */
1996                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1997                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1998                         break;
1999                 }
2000                 break;
2001         case FSF_GOOD:
2002                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2003                 break;
2004         }
2005 }
2006
2007 /**
2008  * zfcp_fsf_close_unit - close zfcp unit
2009  * @erp_action: pointer to struct zfcp_unit
2010  * Returns: 0 on success, error otherwise
2011  */
2012 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2013 {
2014         struct qdio_buffer_element *sbale;
2015         struct zfcp_adapter *adapter = erp_action->adapter;
2016         struct zfcp_fsf_req *req;
2017         int retval = -EIO;
2018
2019         spin_lock_bh(&adapter->req_q_lock);
2020         if (zfcp_fsf_req_sbal_get(adapter))
2021                 goto out;
2022         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2023                                   ZFCP_REQ_AUTO_CLEANUP,
2024                                   adapter->pool.fsf_req_erp);
2025         if (IS_ERR(req)) {
2026                 retval = PTR_ERR(req);
2027                 goto out;
2028         }
2029
2030         sbale = zfcp_qdio_sbale_req(req);
2031         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2032         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2033
2034         req->qtcb->header.port_handle = erp_action->port->handle;
2035         req->qtcb->header.lun_handle = erp_action->unit->handle;
2036         req->handler = zfcp_fsf_close_unit_handler;
2037         req->data = erp_action->unit;
2038         req->erp_action = erp_action;
2039         erp_action->fsf_req = req;
2040
2041         zfcp_fsf_start_erp_timer(req);
2042         retval = zfcp_fsf_req_send(req);
2043         if (retval) {
2044                 zfcp_fsf_req_free(req);
2045                 erp_action->fsf_req = NULL;
2046         }
2047 out:
2048         spin_unlock_bh(&adapter->req_q_lock);
2049         return retval;
2050 }
2051
2052 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2053 {
2054         lat_rec->sum += lat;
2055         lat_rec->min = min(lat_rec->min, lat);
2056         lat_rec->max = max(lat_rec->max, lat);
2057 }
2058
2059 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2060 {
2061         struct fsf_qual_latency_info *lat_inf;
2062         struct latency_cont *lat;
2063         struct zfcp_unit *unit = req->unit;
2064         unsigned long flags;
2065
2066         lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2067
2068         switch (req->qtcb->bottom.io.data_direction) {
2069         case FSF_DATADIR_READ:
2070                 lat = &unit->latencies.read;
2071                 break;
2072         case FSF_DATADIR_WRITE:
2073                 lat = &unit->latencies.write;
2074                 break;
2075         case FSF_DATADIR_CMND:
2076                 lat = &unit->latencies.cmd;
2077                 break;
2078         default:
2079                 return;
2080         }
2081
2082         spin_lock_irqsave(&unit->latencies.lock, flags);
2083         zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2084         zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2085         lat->counter++;
2086         spin_unlock_irqrestore(&unit->latencies.lock, flags);
2087 }
2088
2089 #ifdef CONFIG_BLK_DEV_IO_TRACE
2090 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2091 {
2092         struct fsf_qual_latency_info *lat_inf;
2093         struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2094         struct request *req = scsi_cmnd->request;
2095         struct zfcp_blk_drv_data trace;
2096         int ticks = fsf_req->adapter->timer_ticks;
2097
2098         trace.flags = 0;
2099         trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2100         if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2101                 trace.flags |= ZFCP_BLK_LAT_VALID;
2102                 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2103                 trace.channel_lat = lat_inf->channel_lat * ticks;
2104                 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2105         }
2106         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2107                 trace.flags |= ZFCP_BLK_REQ_ERROR;
2108         trace.inb_usage = fsf_req->qdio_inb_usage;
2109         trace.outb_usage = fsf_req->qdio_outb_usage;
2110
2111         blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2112 }
2113 #else
2114 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2115 {
2116 }
2117 #endif
2118
2119 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2120 {
2121         struct scsi_cmnd *scpnt = req->data;
2122         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2123             &(req->qtcb->bottom.io.fcp_rsp);
2124         u32 sns_len;
2125         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2126         unsigned long flags;
2127
2128         if (unlikely(!scpnt))
2129                 return;
2130
2131         read_lock_irqsave(&req->adapter->abort_lock, flags);
2132
2133         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2134                 set_host_byte(scpnt, DID_SOFT_ERROR);
2135                 set_driver_byte(scpnt, SUGGEST_RETRY);
2136                 goto skip_fsfstatus;
2137         }
2138
2139         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2140                 set_host_byte(scpnt, DID_ERROR);
2141                 goto skip_fsfstatus;
2142         }
2143
2144         set_msg_byte(scpnt, COMMAND_COMPLETE);
2145
2146         scpnt->result |= fcp_rsp_iu->scsi_status;
2147
2148         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2149                 zfcp_fsf_req_latency(req);
2150
2151         zfcp_fsf_trace_latency(req);
2152
2153         if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2154                 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2155                         set_host_byte(scpnt, DID_OK);
2156                 else {
2157                         set_host_byte(scpnt, DID_ERROR);
2158                         goto skip_fsfstatus;
2159                 }
2160         }
2161
2162         if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2163                 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2164                           fcp_rsp_iu->fcp_rsp_len;
2165                 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2166                 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2167
2168                 memcpy(scpnt->sense_buffer,
2169                        zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2170         }
2171
2172         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2173                 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2174                 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2175                     scpnt->underflow)
2176                         set_host_byte(scpnt, DID_ERROR);
2177         }
2178 skip_fsfstatus:
2179         if (scpnt->result != 0)
2180                 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2181         else if (scpnt->retries > 0)
2182                 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2183         else
2184                 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2185
2186         scpnt->host_scribble = NULL;
2187         (scpnt->scsi_done) (scpnt);
2188         /*
2189          * We must hold this lock until scsi_done has been called.
2190          * Otherwise we may call scsi_done after abort regarding this
2191          * command has completed.
2192          * Note: scsi_done must not block!
2193          */
2194         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2195 }
2196
2197 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2198 {
2199         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2200             &(req->qtcb->bottom.io.fcp_rsp);
2201         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2202
2203         if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2204              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2205                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2206 }
2207
2208
2209 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2210 {
2211         struct zfcp_unit *unit;
2212         struct fsf_qtcb_header *header = &req->qtcb->header;
2213
2214         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2215                 unit = req->data;
2216         else
2217                 unit = req->unit;
2218
2219         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2220                 goto skip_fsfstatus;
2221
2222         switch (header->fsf_status) {
2223         case FSF_HANDLE_MISMATCH:
2224         case FSF_PORT_HANDLE_NOT_VALID:
2225                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2226                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2227                 break;
2228         case FSF_FCPLUN_NOT_VALID:
2229         case FSF_LUN_HANDLE_NOT_VALID:
2230                 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2231                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2232                 break;
2233         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2234                 zfcp_fsf_class_not_supp(req);
2235                 break;
2236         case FSF_ACCESS_DENIED:
2237                 zfcp_fsf_access_denied_unit(req, unit);
2238                 break;
2239         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2240                 dev_err(&req->adapter->ccw_device->dev,
2241                         "Incorrect direction %d, unit 0x%016Lx on port "
2242                         "0x%016Lx closed\n",
2243                         req->qtcb->bottom.io.data_direction,
2244                         (unsigned long long)unit->fcp_lun,
2245                         (unsigned long long)unit->port->wwpn);
2246                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2247                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2248                 break;
2249         case FSF_CMND_LENGTH_NOT_VALID:
2250                 dev_err(&req->adapter->ccw_device->dev,
2251                         "Incorrect CDB length %d, unit 0x%016Lx on "
2252                         "port 0x%016Lx closed\n",
2253                         req->qtcb->bottom.io.fcp_cmnd_length,
2254                         (unsigned long long)unit->fcp_lun,
2255                         (unsigned long long)unit->port->wwpn);
2256                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2257                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2258                 break;
2259         case FSF_PORT_BOXED:
2260                 zfcp_erp_port_boxed(unit->port, 53, req);
2261                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2262                                ZFCP_STATUS_FSFREQ_RETRY;
2263                 break;
2264         case FSF_LUN_BOXED:
2265                 zfcp_erp_unit_boxed(unit, 54, req);
2266                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2267                                ZFCP_STATUS_FSFREQ_RETRY;
2268                 break;
2269         case FSF_ADAPTER_STATUS_AVAILABLE:
2270                 if (header->fsf_status_qual.word[0] ==
2271                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2272                         zfcp_test_link(unit->port);
2273                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2274                 break;
2275         }
2276 skip_fsfstatus:
2277         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2278                 zfcp_fsf_send_fcp_ctm_handler(req);
2279         else {
2280                 zfcp_fsf_send_fcp_command_task_handler(req);
2281                 req->unit = NULL;
2282                 zfcp_unit_put(unit);
2283         }
2284 }
2285
2286 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2287 {
2288         u32 *fcp_dl_ptr;
2289
2290         /*
2291          * fcp_dl_addr = start address of fcp_cmnd structure +
2292          * size of fixed part + size of dynamically sized add_dcp_cdb field
2293          * SEE FCP-2 documentation
2294          */
2295         fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2296                         (fcp_cmd->add_fcp_cdb_length << 2));
2297         *fcp_dl_ptr = fcp_dl;
2298 }
2299
2300 /**
2301  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2302  * @adapter: adapter where scsi command is issued
2303  * @unit: unit where command is sent to
2304  * @scsi_cmnd: scsi command to be sent
2305  * @timer: timer to be started when request is initiated
2306  * @req_flags: flags for fsf_request
2307  */
2308 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2309                                    struct zfcp_unit *unit,
2310                                    struct scsi_cmnd *scsi_cmnd,
2311                                    int use_timer, int req_flags)
2312 {
2313         struct zfcp_fsf_req *req;
2314         struct fcp_cmnd_iu *fcp_cmnd_iu;
2315         unsigned int sbtype;
2316         int real_bytes, retval = -EIO;
2317
2318         if (unlikely(!(atomic_read(&unit->status) &
2319                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2320                 return -EBUSY;
2321
2322         spin_lock(&adapter->req_q_lock);
2323         if (!zfcp_fsf_sbal_available(adapter))
2324                 goto out;
2325         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2326                                   adapter->pool.fsf_req_scsi);
2327         if (IS_ERR(req)) {
2328                 retval = PTR_ERR(req);
2329                 goto out;
2330         }
2331
2332         zfcp_unit_get(unit);
2333         req->unit = unit;
2334         req->data = scsi_cmnd;
2335         req->handler = zfcp_fsf_send_fcp_command_handler;
2336         req->qtcb->header.lun_handle = unit->handle;
2337         req->qtcb->header.port_handle = unit->port->handle;
2338         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2339
2340         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2341
2342         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2343         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2344         /*
2345          * set depending on data direction:
2346          *      data direction bits in SBALE (SB Type)
2347          *      data direction bits in QTCB
2348          *      data direction bits in FCP_CMND IU
2349          */
2350         switch (scsi_cmnd->sc_data_direction) {
2351         case DMA_NONE:
2352                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2353                 sbtype = SBAL_FLAGS0_TYPE_READ;
2354                 break;
2355         case DMA_FROM_DEVICE:
2356                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2357                 sbtype = SBAL_FLAGS0_TYPE_READ;
2358                 fcp_cmnd_iu->rddata = 1;
2359                 break;
2360         case DMA_TO_DEVICE:
2361                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2362                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2363                 fcp_cmnd_iu->wddata = 1;
2364                 break;
2365         case DMA_BIDIRECTIONAL:
2366         default:
2367                 retval = -EIO;
2368                 goto failed_scsi_cmnd;
2369         }
2370
2371         if (likely((scsi_cmnd->device->simple_tags) ||
2372                    ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2373                     (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2374                 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2375         else
2376                 fcp_cmnd_iu->task_attribute = UNTAGGED;
2377
2378         if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2379                 fcp_cmnd_iu->add_fcp_cdb_length =
2380                         (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2381
2382         memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2383
2384         req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2385                 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2386
2387         real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2388                                              scsi_sglist(scsi_cmnd),
2389                                              FSF_MAX_SBALS_PER_REQ);
2390         if (unlikely(real_bytes < 0)) {
2391                 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2392                         retval = -EIO;
2393                 else {
2394                         dev_err(&adapter->ccw_device->dev,
2395                                 "Oversize data package, unit 0x%016Lx "
2396                                 "on port 0x%016Lx closed\n",
2397                                 (unsigned long long)unit->fcp_lun,
2398                                 (unsigned long long)unit->port->wwpn);
2399                         zfcp_erp_unit_shutdown(unit, 0, 131, req);
2400                         retval = -EINVAL;
2401                 }
2402                 goto failed_scsi_cmnd;
2403         }
2404
2405         zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2406
2407         if (use_timer)
2408                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2409
2410         retval = zfcp_fsf_req_send(req);
2411         if (unlikely(retval))
2412                 goto failed_scsi_cmnd;
2413
2414         goto out;
2415
2416 failed_scsi_cmnd:
2417         zfcp_unit_put(unit);
2418         zfcp_fsf_req_free(req);
2419         scsi_cmnd->host_scribble = NULL;
2420 out:
2421         spin_unlock(&adapter->req_q_lock);
2422         return retval;
2423 }
2424
2425 /**
2426  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2427  * @adapter: pointer to struct zfcp-adapter
2428  * @unit: pointer to struct zfcp_unit
2429  * @tm_flags: unsigned byte for task management flags
2430  * @req_flags: int request flags
2431  * Returns: on success pointer to struct fsf_req, NULL otherwise
2432  */
2433 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2434                                            struct zfcp_unit *unit,
2435                                            u8 tm_flags, int req_flags)
2436 {
2437         struct qdio_buffer_element *sbale;
2438         struct zfcp_fsf_req *req = NULL;
2439         struct fcp_cmnd_iu *fcp_cmnd_iu;
2440
2441         if (unlikely(!(atomic_read(&unit->status) &
2442                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2443                 return NULL;
2444
2445         spin_lock(&adapter->req_q_lock);
2446         if (!zfcp_fsf_sbal_available(adapter))
2447                 goto out;
2448         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2449                                   adapter->pool.fsf_req_scsi);
2450         if (IS_ERR(req))
2451                 goto out;
2452
2453         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2454         req->data = unit;
2455         req->handler = zfcp_fsf_send_fcp_command_handler;
2456         req->qtcb->header.lun_handle = unit->handle;
2457         req->qtcb->header.port_handle = unit->port->handle;
2458         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2459         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2460         req->qtcb->bottom.io.fcp_cmnd_length =  sizeof(struct fcp_cmnd_iu) +
2461                                                 sizeof(u32);
2462
2463         sbale = zfcp_qdio_sbale_req(req);
2464         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2465         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2466
2467         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2468         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2469         fcp_cmnd_iu->task_management_flags = tm_flags;
2470
2471         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2472         if (!zfcp_fsf_req_send(req))
2473                 goto out;
2474
2475         zfcp_fsf_req_free(req);
2476         req = NULL;
2477 out:
2478         spin_unlock(&adapter->req_q_lock);
2479         return req;
2480 }
2481
2482 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2483 {
2484         if (req->qtcb->header.fsf_status != FSF_GOOD)
2485                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2486 }
2487
2488 /**
2489  * zfcp_fsf_control_file - control file upload/download
2490  * @adapter: pointer to struct zfcp_adapter
2491  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2492  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2493  */
2494 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2495                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2496 {
2497         struct qdio_buffer_element *sbale;
2498         struct zfcp_fsf_req *req = NULL;
2499         struct fsf_qtcb_bottom_support *bottom;
2500         int direction, retval = -EIO, bytes;
2501
2502         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2503                 return ERR_PTR(-EOPNOTSUPP);
2504
2505         switch (fsf_cfdc->command) {
2506         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2507                 direction = SBAL_FLAGS0_TYPE_WRITE;
2508                 break;
2509         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2510                 direction = SBAL_FLAGS0_TYPE_READ;
2511                 break;
2512         default:
2513                 return ERR_PTR(-EINVAL);
2514         }
2515
2516         spin_lock_bh(&adapter->req_q_lock);
2517         if (zfcp_fsf_req_sbal_get(adapter))
2518                 goto out;
2519
2520         req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2521         if (IS_ERR(req)) {
2522                 retval = -EPERM;
2523                 goto out;
2524         }
2525
2526         req->handler = zfcp_fsf_control_file_handler;
2527
2528         sbale = zfcp_qdio_sbale_req(req);
2529         sbale[0].flags |= direction;
2530
2531         bottom = &req->qtcb->bottom.support;
2532         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2533         bottom->option = fsf_cfdc->option;
2534
2535         bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2536                                         FSF_MAX_SBALS_PER_REQ);
2537         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2538                 retval = -ENOMEM;
2539                 zfcp_fsf_req_free(req);
2540                 goto out;
2541         }
2542
2543         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2544         retval = zfcp_fsf_req_send(req);
2545 out:
2546         spin_unlock_bh(&adapter->req_q_lock);
2547
2548         if (!retval) {
2549                 wait_event(req->completion_wq,
2550                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2551                 return req;
2552         }
2553         return ERR_PTR(retval);
2554 }