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         return req;
 687 }
 688
 689 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
 690 {
 691         struct zfcp_fsf_req_qtcb *qtcb;
 692
 693         if (likely(pool))
 694                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 695         else
 696                 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
 697                                         GFP_ATOMIC);
 698         if (unlikely(!qtcb))
 699                 return NULL;
 700
 701         memset(qtcb, 0, sizeof(*qtcb));
 702         qtcb->fsf_req.qtcb = &qtcb->qtcb;
 703         qtcb->fsf_req.pool = pool;
 704
 705         return &qtcb->fsf_req;
 706 }
 707
 708 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
 709                                                 u32 fsf_cmd, int req_flags,
 710                                                 mempool_t *pool)
 711 {
 712         struct qdio_buffer_element *sbale;
 713
 714         struct zfcp_fsf_req *req;
 715         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 716
 717         if (req_flags & ZFCP_REQ_NO_QTCB)
 718                 req = zfcp_fsf_alloc_noqtcb(pool);
 719         else
 720                 req = zfcp_fsf_alloc_qtcb(pool);
 721
 722         if (unlikely(!req))
 723                 return ERR_PTR(-EIO);
 724
 725         if (adapter->req_no == 0)
 726                 adapter->req_no++;
 727
 728         INIT_LIST_HEAD(&req->list);
 729         init_timer(&req->timer);
 730         init_waitqueue_head(&req->completion_wq);
 731
 732         req->adapter = adapter;
 733         req->fsf_command = fsf_cmd;
 734         req->req_id = adapter->req_no++;
 735         req->sbal_number = 1;
 736         req->sbal_first = req_q->first;
 737         req->sbal_last = req_q->first;
 738         req->sbale_curr = 1;
 739
 740         sbale = zfcp_qdio_sbale_req(req);
 741         sbale[0].addr = (void *) req->req_id;
 742         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 743
 744         if (likely(req->qtcb)) {
 745                 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
 746                 req->qtcb->prefix.req_id = req->req_id;
 747                 req->qtcb->prefix.ulp_info = 26;
 748                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 749                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 750                 req->qtcb->header.req_handle = req->req_id;
 751                 req->qtcb->header.fsf_command = req->fsf_command;
 752                 req->seq_no = adapter->fsf_req_seq_no;
 753                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 754                 sbale[1].addr = (void *) req->qtcb;
 755                 sbale[1].length = sizeof(struct fsf_qtcb);
 756         }
 757
 758         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
 759                 zfcp_fsf_req_free(req);
 760                 return ERR_PTR(-EIO);
 761         }
 762
 763         if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
 764                 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 765
 766         return req;
 767 }
 768
 769 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 770 {
 771         struct zfcp_adapter *adapter = req->adapter;
 772         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 773         unsigned long flags;
 774         int idx;
 775
 776         /* put allocated FSF request into hash table */
 777         spin_lock_irqsave(&adapter->req_list_lock, flags);
 778         idx = zfcp_reqlist_hash(req->req_id);
 779         list_add_tail(&req->list, &adapter->req_list[idx]);
 780         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 781
 782         req->qdio_outb_usage = atomic_read(&req_q->count);
 783         req->issued = get_clock();
 784         if (zfcp_qdio_send(req)) {
 785                 /* Queues are down..... */
 786                 del_timer(&req->timer);
 787                 spin_lock(&adapter->req_list_lock);
 788                 zfcp_reqlist_remove(adapter, req);
 789                 spin_unlock(&adapter->req_list_lock);
 790                 /* undo changes in request queue made for this request */
 791                 atomic_add(req->sbal_number, &req_q->count);
 792                 req_q->first -= req->sbal_number;
 793                 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
 794                 req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
 795                 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
 796                 return -EIO;
 797         }
 798
 799         /* Don't increase for unsolicited status */
 800         if (req->qtcb)
 801                 adapter->fsf_req_seq_no++;
 802
 803         return 0;
 804 }
 805
 806 /**
 807  * zfcp_fsf_status_read - send status read request
 808  * @adapter: pointer to struct zfcp_adapter
 809  * @req_flags: request flags
 810  * Returns: 0 on success, ERROR otherwise
 811  */
 812 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
 813 {
 814         struct zfcp_fsf_req *req;
 815         struct fsf_status_read_buffer *sr_buf;
 816         struct qdio_buffer_element *sbale;
 817         int retval = -EIO;
 818
 819         spin_lock_bh(&adapter->req_q_lock);
 820         if (zfcp_fsf_req_sbal_get(adapter))
 821                 goto out;
 822
 823         req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 824                                   ZFCP_REQ_NO_QTCB,
 825                                   adapter->pool.fsf_req_status_read);
 826         if (IS_ERR(req)) {
 827                 retval = PTR_ERR(req);
 828                 goto out;
 829         }
 830
 831         sbale = zfcp_qdio_sbale_req(req);
 832         sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
 833         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 834         req->sbale_curr = 2;
 835
 836         sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
 837         if (!sr_buf) {
 838                 retval = -ENOMEM;
 839                 goto failed_buf;
 840         }
 841         memset(sr_buf, 0, sizeof(*sr_buf));
 842         req->data = sr_buf;
 843         sbale = zfcp_qdio_sbale_curr(req);
 844         sbale->addr = (void *) sr_buf;
 845         sbale->length = sizeof(*sr_buf);
 846
 847         retval = zfcp_fsf_req_send(req);
 848         if (retval)
 849                 goto failed_req_send;
 850
 851         goto out;
 852
 853 failed_req_send:
 854         mempool_free(sr_buf, adapter->pool.data_status_read);
 855 failed_buf:
 856         zfcp_fsf_req_free(req);
 857         zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 858 out:
 859         spin_unlock_bh(&adapter->req_q_lock);
 860         return retval;
 861 }
 862
 863 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 864 {
 865         struct zfcp_unit *unit = req->data;
 866         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 867
 868         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 869                 return;
 870
 871         switch (req->qtcb->header.fsf_status) {
 872         case FSF_PORT_HANDLE_NOT_VALID:
 873                 if (fsq->word[0] == fsq->word[1]) {
 874                         zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
 875                                                 req);
 876                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 877                 }
 878                 break;
 879         case FSF_LUN_HANDLE_NOT_VALID:
 880                 if (fsq->word[0] == fsq->word[1]) {
 881                         zfcp_erp_port_reopen(unit->port, 0, 105, req);
 882                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 883                 }
 884                 break;
 885         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 886                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 887                 break;
 888         case FSF_PORT_BOXED:
 889                 zfcp_erp_port_boxed(unit->port, 47, req);
 890                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 891                                ZFCP_STATUS_FSFREQ_RETRY;
 892                 break;
 893         case FSF_LUN_BOXED:
 894                 zfcp_erp_unit_boxed(unit, 48, req);
 895                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 896                                ZFCP_STATUS_FSFREQ_RETRY;
 897                 break;
 898         case FSF_ADAPTER_STATUS_AVAILABLE:
 899                 switch (fsq->word[0]) {
 900                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 901                         zfcp_test_link(unit->port);
 902                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 903                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 904                         break;
 905                 }
 906                 break;
 907         case FSF_GOOD:
 908                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 909                 break;
 910         }
 911 }
 912
 913 /**
 914  * zfcp_fsf_abort_fcp_command - abort running SCSI command
 915  * @old_req_id: unsigned long
 916  * @adapter: pointer to struct zfcp_adapter
 917  * @unit: pointer to struct zfcp_unit
 918  * @req_flags: integer specifying the request flags
 919  * Returns: pointer to struct zfcp_fsf_req
 920  *
 921  * FIXME(design): should be watched by a timeout !!!
 922  */
 923
 924 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 925                                                 struct zfcp_adapter *adapter,
 926                                                 struct zfcp_unit *unit,
 927                                                 int req_flags)
 928 {
 929         struct qdio_buffer_element *sbale;
 930         struct zfcp_fsf_req *req = NULL;
 931
 932         spin_lock(&adapter->req_q_lock);
 933         if (!zfcp_fsf_sbal_available(adapter))
 934                 goto out;
 935         req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
 936                                   req_flags, adapter->pool.fsf_req_abort);
 937         if (IS_ERR(req))
 938                 goto out;
 939
 940         if (unlikely(!(atomic_read(&unit->status) &
 941                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 942                 goto out_error_free;
 943
 944         sbale = zfcp_qdio_sbale_req(req);
 945         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 946         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 947
 948         req->data = unit;
 949         req->handler = zfcp_fsf_abort_fcp_command_handler;
 950         req->qtcb->header.lun_handle = unit->handle;
 951         req->qtcb->header.port_handle = unit->port->handle;
 952         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 953
 954         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 955         if (!zfcp_fsf_req_send(req))
 956                 goto out;
 957
 958 out_error_free:
 959         zfcp_fsf_req_free(req);
 960         req = NULL;
 961 out:
 962         spin_unlock(&adapter->req_q_lock);
 963         return req;
 964 }
 965
 966 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 967 {
 968         struct zfcp_adapter *adapter = req->adapter;
 969         struct zfcp_send_ct *send_ct = req->data;
 970         struct fsf_qtcb_header *header = &req->qtcb->header;
 971
 972         send_ct->status = -EINVAL;
 973
 974         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 975                 goto skip_fsfstatus;
 976
 977         switch (header->fsf_status) {
 978         case FSF_GOOD:
 979                 zfcp_san_dbf_event_ct_response(req);
 980                 send_ct->status = 0;
 981                 break;
 982         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 983                 zfcp_fsf_class_not_supp(req);
 984                 break;
 985         case FSF_ADAPTER_STATUS_AVAILABLE:
 986                 switch (header->fsf_status_qual.word[0]){
 987                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 988                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 989                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 990                         break;
 991                 }
 992                 break;
 993         case FSF_ACCESS_DENIED:
 994                 break;
 995         case FSF_PORT_BOXED:
 996                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 997                                ZFCP_STATUS_FSFREQ_RETRY;
 998                 break;
 999         case FSF_PORT_HANDLE_NOT_VALID:
1000                 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
1001         case FSF_GENERIC_COMMAND_REJECTED:
1002         case FSF_PAYLOAD_SIZE_MISMATCH:
1003         case FSF_REQUEST_SIZE_TOO_LARGE:
1004         case FSF_RESPONSE_SIZE_TOO_LARGE:
1005         case FSF_SBAL_MISMATCH:
1006                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1007                 break;
1008         }
1009
1010 skip_fsfstatus:
1011         if (send_ct->handler)
1012                 send_ct->handler(send_ct->handler_data);
1013 }
1014
1015 static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1016                                 struct scatterlist *sg_req,
1017                                 struct scatterlist *sg_resp, int max_sbals)
1018 {
1019         int bytes;
1020
1021         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1022                                         sg_req, max_sbals);
1023         if (bytes <= 0)
1024                 return -ENOMEM;
1025         req->qtcb->bottom.support.req_buf_length = bytes;
1026         req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1027
1028         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1029                                         sg_resp, max_sbals);
1030         if (bytes <= 0)
1031                 return -ENOMEM;
1032         req->qtcb->bottom.support.resp_buf_length = bytes;
1033
1034         return 0;
1035 }
1036
1037 /**
1038  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1039  * @ct: pointer to struct zfcp_send_ct with data for request
1040  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1041  * @erp_action: if non-null the Generic Service request sent within ERP
1042  */
1043 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1044                      struct zfcp_erp_action *erp_action)
1045 {
1046         struct zfcp_wka_port *wka_port = ct->wka_port;
1047         struct zfcp_adapter *adapter = wka_port->adapter;
1048         struct zfcp_fsf_req *req;
1049         int ret = -EIO;
1050
1051         spin_lock_bh(&adapter->req_q_lock);
1052         if (zfcp_fsf_req_sbal_get(adapter))
1053                 goto out;
1054
1055         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1056                                   ZFCP_REQ_AUTO_CLEANUP, pool);
1057         if (IS_ERR(req)) {
1058                 ret = PTR_ERR(req);
1059                 goto out;
1060         }
1061
1062         ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1063                                    FSF_MAX_SBALS_PER_REQ);
1064         if (ret)
1065                 goto failed_send;
1066
1067         req->handler = zfcp_fsf_send_ct_handler;
1068         req->qtcb->header.port_handle = wka_port->handle;
1069         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1070         req->qtcb->bottom.support.timeout = ct->timeout;
1071         req->data = ct;
1072
1073         zfcp_san_dbf_event_ct_request(req);
1074
1075         if (erp_action) {
1076                 erp_action->fsf_req = req;
1077                 req->erp_action = erp_action;
1078                 zfcp_fsf_start_erp_timer(req);
1079         } else
1080                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1081
1082         ret = zfcp_fsf_req_send(req);
1083         if (ret)
1084                 goto failed_send;
1085
1086         goto out;
1087
1088 failed_send:
1089         zfcp_fsf_req_free(req);
1090         if (erp_action)
1091                 erp_action->fsf_req = NULL;
1092 out:
1093         spin_unlock_bh(&adapter->req_q_lock);
1094         return ret;
1095 }
1096
1097 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1098 {
1099         struct zfcp_send_els *send_els = req->data;
1100         struct zfcp_port *port = send_els->port;
1101         struct fsf_qtcb_header *header = &req->qtcb->header;
1102
1103         send_els->status = -EINVAL;
1104
1105         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1106                 goto skip_fsfstatus;
1107
1108         switch (header->fsf_status) {
1109         case FSF_GOOD:
1110                 zfcp_san_dbf_event_els_response(req);
1111                 send_els->status = 0;
1112                 break;
1113         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1114                 zfcp_fsf_class_not_supp(req);
1115                 break;
1116         case FSF_ADAPTER_STATUS_AVAILABLE:
1117                 switch (header->fsf_status_qual.word[0]){
1118                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1119                         if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1120                                 zfcp_test_link(port);
1121                         /*fall through */
1122                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1123                 case FSF_SQ_RETRY_IF_POSSIBLE:
1124                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1125                         break;
1126                 }
1127                 break;
1128         case FSF_ELS_COMMAND_REJECTED:
1129         case FSF_PAYLOAD_SIZE_MISMATCH:
1130         case FSF_REQUEST_SIZE_TOO_LARGE:
1131         case FSF_RESPONSE_SIZE_TOO_LARGE:
1132                 break;
1133         case FSF_ACCESS_DENIED:
1134                 zfcp_fsf_access_denied_port(req, port);
1135                 break;
1136         case FSF_SBAL_MISMATCH:
1137                 /* should never occure, avoided in zfcp_fsf_send_els */
1138                 /* fall through */
1139         default:
1140                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1141                 break;
1142         }
1143 skip_fsfstatus:
1144         if (send_els->handler)
1145                 send_els->handler(send_els->handler_data);
1146 }
1147
1148 /**
1149  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1150  * @els: pointer to struct zfcp_send_els with data for the command
1151  */
1152 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1153 {
1154         struct zfcp_fsf_req *req;
1155         struct zfcp_adapter *adapter = els->adapter;
1156         struct fsf_qtcb_bottom_support *bottom;
1157         int ret = -EIO;
1158
1159         if (unlikely(!(atomic_read(&els->port->status) &
1160                        ZFCP_STATUS_COMMON_UNBLOCKED)))
1161                 return -EBUSY;
1162
1163         spin_lock(&adapter->req_q_lock);
1164         if (!zfcp_fsf_sbal_available(adapter))
1165                 goto out;
1166         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1167                                   ZFCP_REQ_AUTO_CLEANUP, NULL);
1168         if (IS_ERR(req)) {
1169                 ret = PTR_ERR(req);
1170                 goto out;
1171         }
1172
1173         ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1174
1175         if (ret)
1176                 goto failed_send;
1177
1178         bottom = &req->qtcb->bottom.support;
1179         req->handler = zfcp_fsf_send_els_handler;
1180         bottom->d_id = els->d_id;
1181         bottom->service_class = FSF_CLASS_3;
1182         bottom->timeout = 2 * R_A_TOV;
1183         req->data = els;
1184
1185         zfcp_san_dbf_event_els_request(req);
1186
1187         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1188         ret = zfcp_fsf_req_send(req);
1189         if (ret)
1190                 goto failed_send;
1191
1192         goto out;
1193
1194 failed_send:
1195         zfcp_fsf_req_free(req);
1196 out:
1197         spin_unlock(&adapter->req_q_lock);
1198         return ret;
1199 }
1200
1201 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1202 {
1203         struct qdio_buffer_element *sbale;
1204         struct zfcp_fsf_req *req;
1205         struct zfcp_adapter *adapter = erp_action->adapter;
1206         int retval = -EIO;
1207
1208         spin_lock_bh(&adapter->req_q_lock);
1209         if (!zfcp_fsf_sbal_available(adapter))
1210                 goto out;
1211         req = zfcp_fsf_req_create(adapter,
1212                                   FSF_QTCB_EXCHANGE_CONFIG_DATA,
1213                                   ZFCP_REQ_AUTO_CLEANUP,
1214                                   adapter->pool.fsf_req_erp);
1215         if (IS_ERR(req)) {
1216                 retval = PTR_ERR(req);
1217                 goto out;
1218         }
1219
1220         sbale = zfcp_qdio_sbale_req(req);
1221         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1222         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1223
1224         req->qtcb->bottom.config.feature_selection =
1225                         FSF_FEATURE_CFDC |
1226                         FSF_FEATURE_LUN_SHARING |
1227                         FSF_FEATURE_NOTIFICATION_LOST |
1228                         FSF_FEATURE_UPDATE_ALERT;
1229         req->erp_action = erp_action;
1230         req->handler = zfcp_fsf_exchange_config_data_handler;
1231         erp_action->fsf_req = req;
1232
1233         zfcp_fsf_start_erp_timer(req);
1234         retval = zfcp_fsf_req_send(req);
1235         if (retval) {
1236                 zfcp_fsf_req_free(req);
1237                 erp_action->fsf_req = NULL;
1238         }
1239 out:
1240         spin_unlock_bh(&adapter->req_q_lock);
1241         return retval;
1242 }
1243
1244 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1245                                        struct fsf_qtcb_bottom_config *data)
1246 {
1247         struct qdio_buffer_element *sbale;
1248         struct zfcp_fsf_req *req = NULL;
1249         int retval = -EIO;
1250
1251         spin_lock_bh(&adapter->req_q_lock);
1252         if (zfcp_fsf_req_sbal_get(adapter))
1253                 goto out;
1254
1255         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1256                                   0, NULL);
1257         if (IS_ERR(req)) {
1258                 retval = PTR_ERR(req);
1259                 goto out;
1260         }
1261
1262         sbale = zfcp_qdio_sbale_req(req);
1263         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1264         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1265         req->handler = zfcp_fsf_exchange_config_data_handler;
1266
1267         req->qtcb->bottom.config.feature_selection =
1268                         FSF_FEATURE_CFDC |
1269                         FSF_FEATURE_LUN_SHARING |
1270                         FSF_FEATURE_NOTIFICATION_LOST |
1271                         FSF_FEATURE_UPDATE_ALERT;
1272
1273         if (data)
1274                 req->data = data;
1275
1276         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1277         retval = zfcp_fsf_req_send(req);
1278 out:
1279         spin_unlock_bh(&adapter->req_q_lock);
1280         if (!retval)
1281                 wait_event(req->completion_wq,
1282                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1283
1284         zfcp_fsf_req_free(req);
1285
1286         return retval;
1287 }
1288
1289 /**
1290  * zfcp_fsf_exchange_port_data - request information about local port
1291  * @erp_action: ERP action for the adapter for which port data is requested
1292  * Returns: 0 on success, error otherwise
1293  */
1294 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1295 {
1296         struct qdio_buffer_element *sbale;
1297         struct zfcp_fsf_req *req;
1298         struct zfcp_adapter *adapter = erp_action->adapter;
1299         int retval = -EIO;
1300
1301         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1302                 return -EOPNOTSUPP;
1303
1304         spin_lock_bh(&adapter->req_q_lock);
1305         if (!zfcp_fsf_sbal_available(adapter))
1306                 goto out;
1307         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1308                                   ZFCP_REQ_AUTO_CLEANUP,
1309                                   adapter->pool.fsf_req_erp);
1310         if (IS_ERR(req)) {
1311                 retval = PTR_ERR(req);
1312                 goto out;
1313         }
1314
1315         sbale = zfcp_qdio_sbale_req(req);
1316         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1317         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1318
1319         req->handler = zfcp_fsf_exchange_port_data_handler;
1320         req->erp_action = erp_action;
1321         erp_action->fsf_req = req;
1322
1323         zfcp_fsf_start_erp_timer(req);
1324         retval = zfcp_fsf_req_send(req);
1325         if (retval) {
1326                 zfcp_fsf_req_free(req);
1327                 erp_action->fsf_req = NULL;
1328         }
1329 out:
1330         spin_unlock_bh(&adapter->req_q_lock);
1331         return retval;
1332 }
1333
1334 /**
1335  * zfcp_fsf_exchange_port_data_sync - request information about local port
1336  * @adapter: pointer to struct zfcp_adapter
1337  * @data: pointer to struct fsf_qtcb_bottom_port
1338  * Returns: 0 on success, error otherwise
1339  */
1340 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1341                                      struct fsf_qtcb_bottom_port *data)
1342 {
1343         struct qdio_buffer_element *sbale;
1344         struct zfcp_fsf_req *req = NULL;
1345         int retval = -EIO;
1346
1347         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1348                 return -EOPNOTSUPP;
1349
1350         spin_lock_bh(&adapter->req_q_lock);
1351         if (!zfcp_fsf_sbal_available(adapter))
1352                 goto out;
1353
1354         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1355                                   NULL);
1356         if (IS_ERR(req)) {
1357                 retval = PTR_ERR(req);
1358                 goto out;
1359         }
1360
1361         if (data)
1362                 req->data = data;
1363
1364         sbale = zfcp_qdio_sbale_req(req);
1365         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1366         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1367
1368         req->handler = zfcp_fsf_exchange_port_data_handler;
1369         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1370         retval = zfcp_fsf_req_send(req);
1371 out:
1372         spin_unlock_bh(&adapter->req_q_lock);
1373         if (!retval)
1374                 wait_event(req->completion_wq,
1375                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1376         zfcp_fsf_req_free(req);
1377
1378         return retval;
1379 }
1380
1381 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1382 {
1383         struct zfcp_port *port = req->data;
1384         struct fsf_qtcb_header *header = &req->qtcb->header;
1385         struct fsf_plogi *plogi;
1386
1387         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1388                 return;
1389
1390         switch (header->fsf_status) {
1391         case FSF_PORT_ALREADY_OPEN:
1392                 break;
1393         case FSF_ACCESS_DENIED:
1394                 zfcp_fsf_access_denied_port(req, port);
1395                 break;
1396         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1397                 dev_warn(&req->adapter->ccw_device->dev,
1398                          "Not enough FCP adapter resources to open "
1399                          "remote port 0x%016Lx\n",
1400                          (unsigned long long)port->wwpn);
1401                 zfcp_erp_port_failed(port, 31, req);
1402                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1403                 break;
1404         case FSF_ADAPTER_STATUS_AVAILABLE:
1405                 switch (header->fsf_status_qual.word[0]) {
1406                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1407                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1408                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1409                         break;
1410                 case FSF_SQ_NO_RETRY_POSSIBLE:
1411                         dev_warn(&req->adapter->ccw_device->dev,
1412                                  "Remote port 0x%016Lx could not be opened\n",
1413                                  (unsigned long long)port->wwpn);
1414                         zfcp_erp_port_failed(port, 32, req);
1415                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1416                         break;
1417                 }
1418                 break;
1419         case FSF_GOOD:
1420                 port->handle = header->port_handle;
1421                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1422                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1423                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1424                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1425                                   &port->status);
1426                 /* check whether D_ID has changed during open */
1427                 /*
1428                  * FIXME: This check is not airtight, as the FCP channel does
1429                  * not monitor closures of target port connections caused on
1430                  * the remote side. Thus, they might miss out on invalidating
1431                  * locally cached WWPNs (and other N_Port parameters) of gone
1432                  * target ports. So, our heroic attempt to make things safe
1433                  * could be undermined by 'open port' response data tagged with
1434                  * obsolete WWPNs. Another reason to monitor potential
1435                  * connection closures ourself at least (by interpreting
1436                  * incoming ELS' and unsolicited status). It just crosses my
1437                  * mind that one should be able to cross-check by means of
1438                  * another GID_PN straight after a port has been opened.
1439                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1440                  */
1441                 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1442                 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1443                         if (plogi->serv_param.wwpn != port->wwpn)
1444                                 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1445                                                   &port->status);
1446                         else {
1447                                 port->wwnn = plogi->serv_param.wwnn;
1448                                 zfcp_fc_plogi_evaluate(port, plogi);
1449                         }
1450                 }
1451                 break;
1452         case FSF_UNKNOWN_OP_SUBTYPE:
1453                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1454                 break;
1455         }
1456 }
1457
1458 /**
1459  * zfcp_fsf_open_port - create and send open port request
1460  * @erp_action: pointer to struct zfcp_erp_action
1461  * Returns: 0 on success, error otherwise
1462  */
1463 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1464 {
1465         struct qdio_buffer_element *sbale;
1466         struct zfcp_adapter *adapter = erp_action->adapter;
1467         struct zfcp_fsf_req *req;
1468         int retval = -EIO;
1469
1470         spin_lock_bh(&adapter->req_q_lock);
1471         if (zfcp_fsf_req_sbal_get(adapter))
1472                 goto out;
1473
1474         req = zfcp_fsf_req_create(adapter,
1475                                   FSF_QTCB_OPEN_PORT_WITH_DID,
1476                                   ZFCP_REQ_AUTO_CLEANUP,
1477                                   adapter->pool.fsf_req_erp);
1478         if (IS_ERR(req)) {
1479                 retval = PTR_ERR(req);
1480                 goto out;
1481         }
1482
1483         sbale = zfcp_qdio_sbale_req(req);
1484         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1485         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1486
1487         req->handler = zfcp_fsf_open_port_handler;
1488         req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1489         req->data = erp_action->port;
1490         req->erp_action = erp_action;
1491         erp_action->fsf_req = req;
1492
1493         zfcp_fsf_start_erp_timer(req);
1494         retval = zfcp_fsf_req_send(req);
1495         if (retval) {
1496                 zfcp_fsf_req_free(req);
1497                 erp_action->fsf_req = NULL;
1498         }
1499 out:
1500         spin_unlock_bh(&adapter->req_q_lock);
1501         return retval;
1502 }
1503
1504 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1505 {
1506         struct zfcp_port *port = req->data;
1507
1508         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1509                 return;
1510
1511         switch (req->qtcb->header.fsf_status) {
1512         case FSF_PORT_HANDLE_NOT_VALID:
1513                 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1514                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1515                 break;
1516         case FSF_ADAPTER_STATUS_AVAILABLE:
1517                 break;
1518         case FSF_GOOD:
1519                 zfcp_erp_modify_port_status(port, 33, req,
1520                                             ZFCP_STATUS_COMMON_OPEN,
1521                                             ZFCP_CLEAR);
1522                 break;
1523         }
1524 }
1525
1526 /**
1527  * zfcp_fsf_close_port - create and send close port request
1528  * @erp_action: pointer to struct zfcp_erp_action
1529  * Returns: 0 on success, error otherwise
1530  */
1531 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1532 {
1533         struct qdio_buffer_element *sbale;
1534         struct zfcp_adapter *adapter = erp_action->adapter;
1535         struct zfcp_fsf_req *req;
1536         int retval = -EIO;
1537
1538         spin_lock_bh(&adapter->req_q_lock);
1539         if (zfcp_fsf_req_sbal_get(adapter))
1540                 goto out;
1541
1542         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1543                                   ZFCP_REQ_AUTO_CLEANUP,
1544                                   adapter->pool.fsf_req_erp);
1545         if (IS_ERR(req)) {
1546                 retval = PTR_ERR(req);
1547                 goto out;
1548         }
1549
1550         sbale = zfcp_qdio_sbale_req(req);
1551         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1552         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1553
1554         req->handler = zfcp_fsf_close_port_handler;
1555         req->data = erp_action->port;
1556         req->erp_action = erp_action;
1557         req->qtcb->header.port_handle = erp_action->port->handle;
1558         erp_action->fsf_req = req;
1559
1560         zfcp_fsf_start_erp_timer(req);
1561         retval = zfcp_fsf_req_send(req);
1562         if (retval) {
1563                 zfcp_fsf_req_free(req);
1564                 erp_action->fsf_req = NULL;
1565         }
1566 out:
1567         spin_unlock_bh(&adapter->req_q_lock);
1568         return retval;
1569 }
1570
1571 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1572 {
1573         struct zfcp_wka_port *wka_port = req->data;
1574         struct fsf_qtcb_header *header = &req->qtcb->header;
1575
1576         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1577                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1578                 goto out;
1579         }
1580
1581         switch (header->fsf_status) {
1582         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1583                 dev_warn(&req->adapter->ccw_device->dev,
1584                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1585         case FSF_ADAPTER_STATUS_AVAILABLE:
1586                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1587         case FSF_ACCESS_DENIED:
1588                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1589                 break;
1590         case FSF_PORT_ALREADY_OPEN:
1591         case FSF_GOOD:
1592                 wka_port->handle = header->port_handle;
1593                 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1594         }
1595 out:
1596         wake_up(&wka_port->completion_wq);
1597 }
1598
1599 /**
1600  * zfcp_fsf_open_wka_port - create and send open wka-port request
1601  * @wka_port: pointer to struct zfcp_wka_port
1602  * Returns: 0 on success, error otherwise
1603  */
1604 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1605 {
1606         struct qdio_buffer_element *sbale;
1607         struct zfcp_adapter *adapter = wka_port->adapter;
1608         struct zfcp_fsf_req *req;
1609         int retval = -EIO;
1610
1611         spin_lock_bh(&adapter->req_q_lock);
1612         if (zfcp_fsf_req_sbal_get(adapter))
1613                 goto out;
1614
1615         req = zfcp_fsf_req_create(adapter,
1616                                   FSF_QTCB_OPEN_PORT_WITH_DID,
1617                                   ZFCP_REQ_AUTO_CLEANUP,
1618                                   adapter->pool.fsf_req_erp);
1619         if (unlikely(IS_ERR(req))) {
1620                 retval = PTR_ERR(req);
1621                 goto out;
1622         }
1623
1624         sbale = zfcp_qdio_sbale_req(req);
1625         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1626         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1627
1628         req->handler = zfcp_fsf_open_wka_port_handler;
1629         req->qtcb->bottom.support.d_id = wka_port->d_id;
1630         req->data = wka_port;
1631
1632         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1633         retval = zfcp_fsf_req_send(req);
1634         if (retval)
1635                 zfcp_fsf_req_free(req);
1636 out:
1637         spin_unlock_bh(&adapter->req_q_lock);
1638         return retval;
1639 }
1640
1641 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1642 {
1643         struct zfcp_wka_port *wka_port = req->data;
1644
1645         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1646                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1647                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
1648         }
1649
1650         wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1651         wake_up(&wka_port->completion_wq);
1652 }
1653
1654 /**
1655  * zfcp_fsf_close_wka_port - create and send close wka port request
1656  * @erp_action: pointer to struct zfcp_erp_action
1657  * Returns: 0 on success, error otherwise
1658  */
1659 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1660 {
1661         struct qdio_buffer_element *sbale;
1662         struct zfcp_adapter *adapter = wka_port->adapter;
1663         struct zfcp_fsf_req *req;
1664         int retval = -EIO;
1665
1666         spin_lock_bh(&adapter->req_q_lock);
1667         if (zfcp_fsf_req_sbal_get(adapter))
1668                 goto out;
1669
1670         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1671                                   ZFCP_REQ_AUTO_CLEANUP,
1672                                   adapter->pool.fsf_req_erp);
1673         if (unlikely(IS_ERR(req))) {
1674                 retval = PTR_ERR(req);
1675                 goto out;
1676         }
1677
1678         sbale = zfcp_qdio_sbale_req(req);
1679         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1680         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1681
1682         req->handler = zfcp_fsf_close_wka_port_handler;
1683         req->data = wka_port;
1684         req->qtcb->header.port_handle = wka_port->handle;
1685
1686         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1687         retval = zfcp_fsf_req_send(req);
1688         if (retval)
1689                 zfcp_fsf_req_free(req);
1690 out:
1691         spin_unlock_bh(&adapter->req_q_lock);
1692         return retval;
1693 }
1694
1695 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1696 {
1697         struct zfcp_port *port = req->data;
1698         struct fsf_qtcb_header *header = &req->qtcb->header;
1699         struct zfcp_unit *unit;
1700
1701         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1702                 goto skip_fsfstatus;
1703
1704         switch (header->fsf_status) {
1705         case FSF_PORT_HANDLE_NOT_VALID:
1706                 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1707                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1708                 break;
1709         case FSF_ACCESS_DENIED:
1710                 zfcp_fsf_access_denied_port(req, port);
1711                 break;
1712         case FSF_PORT_BOXED:
1713                 zfcp_erp_port_boxed(port, 50, req);
1714                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1715                                ZFCP_STATUS_FSFREQ_RETRY;
1716                 /* can't use generic zfcp_erp_modify_port_status because
1717                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1718                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1719                 list_for_each_entry(unit, &port->unit_list_head, list)
1720                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1721                                           &unit->status);
1722                 break;
1723         case FSF_ADAPTER_STATUS_AVAILABLE:
1724                 switch (header->fsf_status_qual.word[0]) {
1725                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1726                         /* fall through */
1727                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1728                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1729                         break;
1730                 }
1731                 break;
1732         case FSF_GOOD:
1733                 /* can't use generic zfcp_erp_modify_port_status because
1734                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1735                  */
1736                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1737                 list_for_each_entry(unit, &port->unit_list_head, list)
1738                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1739                                           &unit->status);
1740                 break;
1741         }
1742 skip_fsfstatus:
1743         atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1744 }
1745
1746 /**
1747  * zfcp_fsf_close_physical_port - close physical port
1748  * @erp_action: pointer to struct zfcp_erp_action
1749  * Returns: 0 on success
1750  */
1751 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1752 {
1753         struct qdio_buffer_element *sbale;
1754         struct zfcp_adapter *adapter = erp_action->adapter;
1755         struct zfcp_fsf_req *req;
1756         int retval = -EIO;
1757
1758         spin_lock_bh(&adapter->req_q_lock);
1759         if (zfcp_fsf_req_sbal_get(adapter))
1760                 goto out;
1761
1762         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1763                                   ZFCP_REQ_AUTO_CLEANUP,
1764                                   adapter->pool.fsf_req_erp);
1765         if (IS_ERR(req)) {
1766                 retval = PTR_ERR(req);
1767                 goto out;
1768         }
1769
1770         sbale = zfcp_qdio_sbale_req(req);
1771         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1772         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1773
1774         req->data = erp_action->port;
1775         req->qtcb->header.port_handle = erp_action->port->handle;
1776         req->erp_action = erp_action;
1777         req->handler = zfcp_fsf_close_physical_port_handler;
1778         erp_action->fsf_req = req;
1779         atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1780                         &erp_action->port->status);
1781
1782         zfcp_fsf_start_erp_timer(req);
1783         retval = zfcp_fsf_req_send(req);
1784         if (retval) {
1785                 zfcp_fsf_req_free(req);
1786                 erp_action->fsf_req = NULL;
1787         }
1788 out:
1789         spin_unlock_bh(&adapter->req_q_lock);
1790         return retval;
1791 }
1792
1793 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1794 {
1795         struct zfcp_adapter *adapter = req->adapter;
1796         struct zfcp_unit *unit = req->data;
1797         struct fsf_qtcb_header *header = &req->qtcb->header;
1798         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1799         struct fsf_queue_designator *queue_designator =
1800                                 &header->fsf_status_qual.fsf_queue_designator;
1801         int exclusive, readwrite;
1802
1803         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1804                 return;
1805
1806         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1807                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1808                           ZFCP_STATUS_UNIT_SHARED |
1809                           ZFCP_STATUS_UNIT_READONLY,
1810                           &unit->status);
1811
1812         switch (header->fsf_status) {
1813
1814         case FSF_PORT_HANDLE_NOT_VALID:
1815                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1816                 /* fall through */
1817         case FSF_LUN_ALREADY_OPEN:
1818                 break;
1819         case FSF_ACCESS_DENIED:
1820                 zfcp_fsf_access_denied_unit(req, unit);
1821                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1822                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1823                 break;
1824         case FSF_PORT_BOXED:
1825                 zfcp_erp_port_boxed(unit->port, 51, req);
1826                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1827                                ZFCP_STATUS_FSFREQ_RETRY;
1828                 break;
1829         case FSF_LUN_SHARING_VIOLATION:
1830                 if (header->fsf_status_qual.word[0])
1831                         dev_warn(&adapter->ccw_device->dev,
1832                                  "LUN 0x%Lx on port 0x%Lx is already in "
1833                                  "use by CSS%d, MIF Image ID %x\n",
1834                                  (unsigned long long)unit->fcp_lun,
1835                                  (unsigned long long)unit->port->wwpn,
1836                                  queue_designator->cssid,
1837                                  queue_designator->hla);
1838                 else
1839                         zfcp_act_eval_err(adapter,
1840                                           header->fsf_status_qual.word[2]);
1841                 zfcp_erp_unit_access_denied(unit, 60, req);
1842                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1843                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1844                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1845                 break;
1846         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1847                 dev_warn(&adapter->ccw_device->dev,
1848                          "No handle is available for LUN "
1849                          "0x%016Lx on port 0x%016Lx\n",
1850                          (unsigned long long)unit->fcp_lun,
1851                          (unsigned long long)unit->port->wwpn);
1852                 zfcp_erp_unit_failed(unit, 34, req);
1853                 /* fall through */
1854         case FSF_INVALID_COMMAND_OPTION:
1855                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1856                 break;
1857         case FSF_ADAPTER_STATUS_AVAILABLE:
1858                 switch (header->fsf_status_qual.word[0]) {
1859                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1860                         zfcp_test_link(unit->port);
1861                         /* fall through */
1862                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1863                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1864                         break;
1865                 }
1866                 break;
1867
1868         case FSF_GOOD:
1869                 unit->handle = header->lun_handle;
1870                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1871
1872                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1873                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1874                     (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1875                         exclusive = (bottom->lun_access_info &
1876                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1877                         readwrite = (bottom->lun_access_info &
1878                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1879
1880                         if (!exclusive)
1881                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1882                                                 &unit->status);
1883
1884                         if (!readwrite) {
1885                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1886                                                 &unit->status);
1887                                 dev_info(&adapter->ccw_device->dev,
1888                                          "SCSI device at LUN 0x%016Lx on port "
1889                                          "0x%016Lx opened read-only\n",
1890                                          (unsigned long long)unit->fcp_lun,
1891                                          (unsigned long long)unit->port->wwpn);
1892                         }
1893
1894                         if (exclusive && !readwrite) {
1895                                 dev_err(&adapter->ccw_device->dev,
1896                                         "Exclusive read-only access not "
1897                                         "supported (unit 0x%016Lx, "
1898                                         "port 0x%016Lx)\n",
1899                                         (unsigned long long)unit->fcp_lun,
1900                                         (unsigned long long)unit->port->wwpn);
1901                                 zfcp_erp_unit_failed(unit, 35, req);
1902                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1903                                 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1904                         } else if (!exclusive && readwrite) {
1905                                 dev_err(&adapter->ccw_device->dev,
1906                                         "Shared read-write access not "
1907                                         "supported (unit 0x%016Lx, port "
1908                                         "0x%016Lx\n)",
1909                                         (unsigned long long)unit->fcp_lun,
1910                                         (unsigned long long)unit->port->wwpn);
1911                                 zfcp_erp_unit_failed(unit, 36, req);
1912                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1913                                 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1914                         }
1915                 }
1916                 break;
1917         }
1918 }
1919
1920 /**
1921  * zfcp_fsf_open_unit - open unit
1922  * @erp_action: pointer to struct zfcp_erp_action
1923  * Returns: 0 on success, error otherwise
1924  */
1925 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1926 {
1927         struct qdio_buffer_element *sbale;
1928         struct zfcp_adapter *adapter = erp_action->adapter;
1929         struct zfcp_fsf_req *req;
1930         int retval = -EIO;
1931
1932         spin_lock_bh(&adapter->req_q_lock);
1933         if (zfcp_fsf_req_sbal_get(adapter))
1934                 goto out;
1935
1936         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1937                                   ZFCP_REQ_AUTO_CLEANUP,
1938                                   adapter->pool.fsf_req_erp);
1939         if (IS_ERR(req)) {
1940                 retval = PTR_ERR(req);
1941                 goto out;
1942         }
1943
1944         sbale = zfcp_qdio_sbale_req(req);
1945         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1946         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1947
1948         req->qtcb->header.port_handle = erp_action->port->handle;
1949         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1950         req->handler = zfcp_fsf_open_unit_handler;
1951         req->data = erp_action->unit;
1952         req->erp_action = erp_action;
1953         erp_action->fsf_req = req;
1954
1955         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1956                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1957
1958         zfcp_fsf_start_erp_timer(req);
1959         retval = zfcp_fsf_req_send(req);
1960         if (retval) {
1961                 zfcp_fsf_req_free(req);
1962                 erp_action->fsf_req = NULL;
1963         }
1964 out:
1965         spin_unlock_bh(&adapter->req_q_lock);
1966         return retval;
1967 }
1968
1969 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1970 {
1971         struct zfcp_unit *unit = req->data;
1972
1973         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1974                 return;
1975
1976         switch (req->qtcb->header.fsf_status) {
1977         case FSF_PORT_HANDLE_NOT_VALID:
1978                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1979                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1980                 break;
1981         case FSF_LUN_HANDLE_NOT_VALID:
1982                 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1983                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1984                 break;
1985         case FSF_PORT_BOXED:
1986                 zfcp_erp_port_boxed(unit->port, 52, req);
1987                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1988                                ZFCP_STATUS_FSFREQ_RETRY;
1989                 break;
1990         case FSF_ADAPTER_STATUS_AVAILABLE:
1991                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1992                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1993                         zfcp_test_link(unit->port);
1994                         /* fall through */
1995                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1996                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1997                         break;
1998                 }
1999                 break;
2000         case FSF_GOOD:
2001                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2002                 break;
2003         }
2004 }
2005
2006 /**
2007  * zfcp_fsf_close_unit - close zfcp unit
2008  * @erp_action: pointer to struct zfcp_unit
2009  * Returns: 0 on success, error otherwise
2010  */
2011 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2012 {
2013         struct qdio_buffer_element *sbale;
2014         struct zfcp_adapter *adapter = erp_action->adapter;
2015         struct zfcp_fsf_req *req;
2016         int retval = -EIO;
2017
2018         spin_lock_bh(&adapter->req_q_lock);
2019         if (zfcp_fsf_req_sbal_get(adapter))
2020                 goto out;
2021         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2022                                   ZFCP_REQ_AUTO_CLEANUP,
2023                                   adapter->pool.fsf_req_erp);
2024         if (IS_ERR(req)) {
2025                 retval = PTR_ERR(req);
2026                 goto out;
2027         }
2028
2029         sbale = zfcp_qdio_sbale_req(req);
2030         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2031         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2032
2033         req->qtcb->header.port_handle = erp_action->port->handle;
2034         req->qtcb->header.lun_handle = erp_action->unit->handle;
2035         req->handler = zfcp_fsf_close_unit_handler;
2036         req->data = erp_action->unit;
2037         req->erp_action = erp_action;
2038         erp_action->fsf_req = req;
2039
2040         zfcp_fsf_start_erp_timer(req);
2041         retval = zfcp_fsf_req_send(req);
2042         if (retval) {
2043                 zfcp_fsf_req_free(req);
2044                 erp_action->fsf_req = NULL;
2045         }
2046 out:
2047         spin_unlock_bh(&adapter->req_q_lock);
2048         return retval;
2049 }
2050
2051 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2052 {
2053         lat_rec->sum += lat;
2054         lat_rec->min = min(lat_rec->min, lat);
2055         lat_rec->max = max(lat_rec->max, lat);
2056 }
2057
2058 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2059 {
2060         struct fsf_qual_latency_info *lat_inf;
2061         struct latency_cont *lat;
2062         struct zfcp_unit *unit = req->unit;
2063         unsigned long flags;
2064
2065         lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2066
2067         switch (req->qtcb->bottom.io.data_direction) {
2068         case FSF_DATADIR_READ:
2069                 lat = &unit->latencies.read;
2070                 break;
2071         case FSF_DATADIR_WRITE:
2072                 lat = &unit->latencies.write;
2073                 break;
2074         case FSF_DATADIR_CMND:
2075                 lat = &unit->latencies.cmd;
2076                 break;
2077         default:
2078                 return;
2079         }
2080
2081         spin_lock_irqsave(&unit->latencies.lock, flags);
2082         zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2083         zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2084         lat->counter++;
2085         spin_unlock_irqrestore(&unit->latencies.lock, flags);
2086 }
2087
2088 #ifdef CONFIG_BLK_DEV_IO_TRACE
2089 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2090 {
2091         struct fsf_qual_latency_info *lat_inf;
2092         struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2093         struct request *req = scsi_cmnd->request;
2094         struct zfcp_blk_drv_data trace;
2095         int ticks = fsf_req->adapter->timer_ticks;
2096
2097         trace.flags = 0;
2098         trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2099         if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2100                 trace.flags |= ZFCP_BLK_LAT_VALID;
2101                 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2102                 trace.channel_lat = lat_inf->channel_lat * ticks;
2103                 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2104         }
2105         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2106                 trace.flags |= ZFCP_BLK_REQ_ERROR;
2107         trace.inb_usage = fsf_req->qdio_inb_usage;
2108         trace.outb_usage = fsf_req->qdio_outb_usage;
2109
2110         blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2111 }
2112 #else
2113 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2114 {
2115 }
2116 #endif
2117
2118 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2119 {
2120         struct scsi_cmnd *scpnt = req->data;
2121         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2122             &(req->qtcb->bottom.io.fcp_rsp);
2123         u32 sns_len;
2124         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2125         unsigned long flags;
2126
2127         if (unlikely(!scpnt))
2128                 return;
2129
2130         read_lock_irqsave(&req->adapter->abort_lock, flags);
2131
2132         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2133                 set_host_byte(scpnt, DID_SOFT_ERROR);
2134                 set_driver_byte(scpnt, SUGGEST_RETRY);
2135                 goto skip_fsfstatus;
2136         }
2137
2138         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2139                 set_host_byte(scpnt, DID_ERROR);
2140                 goto skip_fsfstatus;
2141         }
2142
2143         set_msg_byte(scpnt, COMMAND_COMPLETE);
2144
2145         scpnt->result |= fcp_rsp_iu->scsi_status;
2146
2147         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2148                 zfcp_fsf_req_latency(req);
2149
2150         zfcp_fsf_trace_latency(req);
2151
2152         if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2153                 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2154                         set_host_byte(scpnt, DID_OK);
2155                 else {
2156                         set_host_byte(scpnt, DID_ERROR);
2157                         goto skip_fsfstatus;
2158                 }
2159         }
2160
2161         if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2162                 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2163                           fcp_rsp_iu->fcp_rsp_len;
2164                 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2165                 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2166
2167                 memcpy(scpnt->sense_buffer,
2168                        zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2169         }
2170
2171         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2172                 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2173                 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2174                     scpnt->underflow)
2175                         set_host_byte(scpnt, DID_ERROR);
2176         }
2177 skip_fsfstatus:
2178         if (scpnt->result != 0)
2179                 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2180         else if (scpnt->retries > 0)
2181                 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2182         else
2183                 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2184
2185         scpnt->host_scribble = NULL;
2186         (scpnt->scsi_done) (scpnt);
2187         /*
2188          * We must hold this lock until scsi_done has been called.
2189          * Otherwise we may call scsi_done after abort regarding this
2190          * command has completed.
2191          * Note: scsi_done must not block!
2192          */
2193         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2194 }
2195
2196 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2197 {
2198         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2199             &(req->qtcb->bottom.io.fcp_rsp);
2200         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2201
2202         if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2203              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2204                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2205 }
2206
2207
2208 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2209 {
2210         struct zfcp_unit *unit;
2211         struct fsf_qtcb_header *header = &req->qtcb->header;
2212
2213         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2214                 unit = req->data;
2215         else
2216                 unit = req->unit;
2217
2218         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2219                 goto skip_fsfstatus;
2220
2221         switch (header->fsf_status) {
2222         case FSF_HANDLE_MISMATCH:
2223         case FSF_PORT_HANDLE_NOT_VALID:
2224                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2225                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2226                 break;
2227         case FSF_FCPLUN_NOT_VALID:
2228         case FSF_LUN_HANDLE_NOT_VALID:
2229                 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2230                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2231                 break;
2232         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2233                 zfcp_fsf_class_not_supp(req);
2234                 break;
2235         case FSF_ACCESS_DENIED:
2236                 zfcp_fsf_access_denied_unit(req, unit);
2237                 break;
2238         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2239                 dev_err(&req->adapter->ccw_device->dev,
2240                         "Incorrect direction %d, unit 0x%016Lx on port "
2241                         "0x%016Lx closed\n",
2242                         req->qtcb->bottom.io.data_direction,
2243                         (unsigned long long)unit->fcp_lun,
2244                         (unsigned long long)unit->port->wwpn);
2245                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2246                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2247                 break;
2248         case FSF_CMND_LENGTH_NOT_VALID:
2249                 dev_err(&req->adapter->ccw_device->dev,
2250                         "Incorrect CDB length %d, unit 0x%016Lx on "
2251                         "port 0x%016Lx closed\n",
2252                         req->qtcb->bottom.io.fcp_cmnd_length,
2253                         (unsigned long long)unit->fcp_lun,
2254                         (unsigned long long)unit->port->wwpn);
2255                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2256                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2257                 break;
2258         case FSF_PORT_BOXED:
2259                 zfcp_erp_port_boxed(unit->port, 53, req);
2260                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2261                                ZFCP_STATUS_FSFREQ_RETRY;
2262                 break;
2263         case FSF_LUN_BOXED:
2264                 zfcp_erp_unit_boxed(unit, 54, req);
2265                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2266                                ZFCP_STATUS_FSFREQ_RETRY;
2267                 break;
2268         case FSF_ADAPTER_STATUS_AVAILABLE:
2269                 if (header->fsf_status_qual.word[0] ==
2270                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2271                         zfcp_test_link(unit->port);
2272                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2273                 break;
2274         }
2275 skip_fsfstatus:
2276         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2277                 zfcp_fsf_send_fcp_ctm_handler(req);
2278         else {
2279                 zfcp_fsf_send_fcp_command_task_handler(req);
2280                 req->unit = NULL;
2281                 zfcp_unit_put(unit);
2282         }
2283 }
2284
2285 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2286 {
2287         u32 *fcp_dl_ptr;
2288
2289         /*
2290          * fcp_dl_addr = start address of fcp_cmnd structure +
2291          * size of fixed part + size of dynamically sized add_dcp_cdb field
2292          * SEE FCP-2 documentation
2293          */
2294         fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2295                         (fcp_cmd->add_fcp_cdb_length << 2));
2296         *fcp_dl_ptr = fcp_dl;
2297 }
2298
2299 /**
2300  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2301  * @adapter: adapter where scsi command is issued
2302  * @unit: unit where command is sent to
2303  * @scsi_cmnd: scsi command to be sent
2304  * @timer: timer to be started when request is initiated
2305  * @req_flags: flags for fsf_request
2306  */
2307 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2308                                    struct zfcp_unit *unit,
2309                                    struct scsi_cmnd *scsi_cmnd,
2310                                    int use_timer, int req_flags)
2311 {
2312         struct zfcp_fsf_req *req;
2313         struct fcp_cmnd_iu *fcp_cmnd_iu;
2314         unsigned int sbtype;
2315         int real_bytes, retval = -EIO;
2316
2317         if (unlikely(!(atomic_read(&unit->status) &
2318                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2319                 return -EBUSY;
2320
2321         spin_lock(&adapter->req_q_lock);
2322         if (!zfcp_fsf_sbal_available(adapter))
2323                 goto out;
2324         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2325                                   adapter->pool.fsf_req_scsi);
2326         if (IS_ERR(req)) {
2327                 retval = PTR_ERR(req);
2328                 goto out;
2329         }
2330
2331         zfcp_unit_get(unit);
2332         req->unit = unit;
2333         req->data = scsi_cmnd;
2334         req->handler = zfcp_fsf_send_fcp_command_handler;
2335         req->qtcb->header.lun_handle = unit->handle;
2336         req->qtcb->header.port_handle = unit->port->handle;
2337         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2338
2339         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2340
2341         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2342         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2343         /*
2344          * set depending on data direction:
2345          *      data direction bits in SBALE (SB Type)
2346          *      data direction bits in QTCB
2347          *      data direction bits in FCP_CMND IU
2348          */
2349         switch (scsi_cmnd->sc_data_direction) {
2350         case DMA_NONE:
2351                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2352                 sbtype = SBAL_FLAGS0_TYPE_READ;
2353                 break;
2354         case DMA_FROM_DEVICE:
2355                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2356                 sbtype = SBAL_FLAGS0_TYPE_READ;
2357                 fcp_cmnd_iu->rddata = 1;
2358                 break;
2359         case DMA_TO_DEVICE:
2360                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2361                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2362                 fcp_cmnd_iu->wddata = 1;
2363                 break;
2364         case DMA_BIDIRECTIONAL:
2365         default:
2366                 retval = -EIO;
2367                 goto failed_scsi_cmnd;
2368         }
2369
2370         if (likely((scsi_cmnd->device->simple_tags) ||
2371                    ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2372                     (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2373                 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2374         else
2375                 fcp_cmnd_iu->task_attribute = UNTAGGED;
2376
2377         if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2378                 fcp_cmnd_iu->add_fcp_cdb_length =
2379                         (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2380
2381         memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2382
2383         req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2384                 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2385
2386         real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2387                                              scsi_sglist(scsi_cmnd),
2388                                              FSF_MAX_SBALS_PER_REQ);
2389         if (unlikely(real_bytes < 0)) {
2390                 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2391                         retval = -EIO;
2392                 else {
2393                         dev_err(&adapter->ccw_device->dev,
2394                                 "Oversize data package, unit 0x%016Lx "
2395                                 "on port 0x%016Lx closed\n",
2396                                 (unsigned long long)unit->fcp_lun,
2397                                 (unsigned long long)unit->port->wwpn);
2398                         zfcp_erp_unit_shutdown(unit, 0, 131, req);
2399                         retval = -EINVAL;
2400                 }
2401                 goto failed_scsi_cmnd;
2402         }
2403
2404         zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2405
2406         if (use_timer)
2407                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2408
2409         retval = zfcp_fsf_req_send(req);
2410         if (unlikely(retval))
2411                 goto failed_scsi_cmnd;
2412
2413         goto out;
2414
2415 failed_scsi_cmnd:
2416         zfcp_unit_put(unit);
2417         zfcp_fsf_req_free(req);
2418         scsi_cmnd->host_scribble = NULL;
2419 out:
2420         spin_unlock(&adapter->req_q_lock);
2421         return retval;
2422 }
2423
2424 /**
2425  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2426  * @adapter: pointer to struct zfcp-adapter
2427  * @unit: pointer to struct zfcp_unit
2428  * @tm_flags: unsigned byte for task management flags
2429  * @req_flags: int request flags
2430  * Returns: on success pointer to struct fsf_req, NULL otherwise
2431  */
2432 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2433                                            struct zfcp_unit *unit,
2434                                            u8 tm_flags, int req_flags)
2435 {
2436         struct qdio_buffer_element *sbale;
2437         struct zfcp_fsf_req *req = NULL;
2438         struct fcp_cmnd_iu *fcp_cmnd_iu;
2439
2440         if (unlikely(!(atomic_read(&unit->status) &
2441                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2442                 return NULL;
2443
2444         spin_lock(&adapter->req_q_lock);
2445         if (!zfcp_fsf_sbal_available(adapter))
2446                 goto out;
2447         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2448                                   adapter->pool.fsf_req_scsi);
2449         if (IS_ERR(req))
2450                 goto out;
2451
2452         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2453         req->data = unit;
2454         req->handler = zfcp_fsf_send_fcp_command_handler;
2455         req->qtcb->header.lun_handle = unit->handle;
2456         req->qtcb->header.port_handle = unit->port->handle;
2457         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2458         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2459         req->qtcb->bottom.io.fcp_cmnd_length =  sizeof(struct fcp_cmnd_iu) +
2460                                                 sizeof(u32);
2461
2462         sbale = zfcp_qdio_sbale_req(req);
2463         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2464         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2465
2466         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2467         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2468         fcp_cmnd_iu->task_management_flags = tm_flags;
2469
2470         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2471         if (!zfcp_fsf_req_send(req))
2472                 goto out;
2473
2474         zfcp_fsf_req_free(req);
2475         req = NULL;
2476 out:
2477         spin_unlock(&adapter->req_q_lock);
2478         return req;
2479 }
2480
2481 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2482 {
2483         if (req->qtcb->header.fsf_status != FSF_GOOD)
2484                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2485 }
2486
2487 /**
2488  * zfcp_fsf_control_file - control file upload/download
2489  * @adapter: pointer to struct zfcp_adapter
2490  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2491  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2492  */
2493 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2494                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2495 {
2496         struct qdio_buffer_element *sbale;
2497         struct zfcp_fsf_req *req = NULL;
2498         struct fsf_qtcb_bottom_support *bottom;
2499         int direction, retval = -EIO, bytes;
2500
2501         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2502                 return ERR_PTR(-EOPNOTSUPP);
2503
2504         switch (fsf_cfdc->command) {
2505         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2506                 direction = SBAL_FLAGS0_TYPE_WRITE;
2507                 break;
2508         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2509                 direction = SBAL_FLAGS0_TYPE_READ;
2510                 break;
2511         default:
2512                 return ERR_PTR(-EINVAL);
2513         }
2514
2515         spin_lock_bh(&adapter->req_q_lock);
2516         if (zfcp_fsf_req_sbal_get(adapter))
2517                 goto out;
2518
2519         req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2520         if (IS_ERR(req)) {
2521                 retval = -EPERM;
2522                 goto out;
2523         }
2524
2525         req->handler = zfcp_fsf_control_file_handler;
2526
2527         sbale = zfcp_qdio_sbale_req(req);
2528         sbale[0].flags |= direction;
2529
2530         bottom = &req->qtcb->bottom.support;
2531         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2532         bottom->option = fsf_cfdc->option;
2533
2534         bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2535                                         FSF_MAX_SBALS_PER_REQ);
2536         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2537                 retval = -ENOMEM;
2538                 zfcp_fsf_req_free(req);
2539                 goto out;
2540         }
2541
2542         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2543         retval = zfcp_fsf_req_send(req);
2544 out:
2545         spin_unlock_bh(&adapter->req_q_lock);
2546
2547         if (!retval) {
2548                 wait_event(req->completion_wq,
2549                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2550                 return req;
2551         }
2552         return ERR_PTR(retval);
2553 }