drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2008
   7  */
   8
   9 #include <linux/blktrace_api.h>
  10 #include "zfcp_ext.h"
  11
  12 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  13 {
  14         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  15         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
  16                                 NULL);
  17 }
  18
  19 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  20                                  unsigned long timeout)
  21 {
  22         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  23         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  24         fsf_req->timer.expires = jiffies + timeout;
  25         add_timer(&fsf_req->timer);
  26 }
  27
  28 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  29 {
  30         BUG_ON(!fsf_req->erp_action);
  31         fsf_req->timer.function = zfcp_erp_timeout_handler;
  32         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  33         fsf_req->timer.expires = jiffies + 30 * HZ;
  34         add_timer(&fsf_req->timer);
  35 }
  36
  37 /* association between FSF command and FSF QTCB type */
  38 static u32 fsf_qtcb_type[] = {
  39         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  40         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  41         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  42         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  43         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  44         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  45         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  46         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  47         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  48         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  49         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  50         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  51         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  52 };
  53
  54 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
  55 {
  56         u16 subtable = table >> 16;
  57         u16 rule = table & 0xffff;
  58         const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
  59
  60         if (subtable && subtable < ARRAY_SIZE(act_type))
  61                 dev_warn(&adapter->ccw_device->dev,
  62                          "Access denied according to ACT rule type %s, "
  63                          "rule %d\n", act_type[subtable], rule);
  64 }
  65
  66 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
  67                                         struct zfcp_port *port)
  68 {
  69         struct fsf_qtcb_header *header = &req->qtcb->header;
  70         dev_warn(&req->adapter->ccw_device->dev,
  71                  "Access denied to port 0x%016Lx\n",
  72                  (unsigned long long)port->wwpn);
  73         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  74         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  75         zfcp_erp_port_access_denied(port, 55, req);
  76         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  77 }
  78
  79 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
  80                                         struct zfcp_unit *unit)
  81 {
  82         struct fsf_qtcb_header *header = &req->qtcb->header;
  83         dev_warn(&req->adapter->ccw_device->dev,
  84                  "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
  85                  (unsigned long long)unit->fcp_lun,
  86                  (unsigned long long)unit->port->wwpn);
  87         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  88         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  89         zfcp_erp_unit_access_denied(unit, 59, req);
  90         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  91 }
  92
  93 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  94 {
  95         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  96                 "operational because of an unsupported FC class\n");
  97         zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
  98         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  99 }
 100
 101 /**
 102  * zfcp_fsf_req_free - free memory used by fsf request
 103  * @fsf_req: pointer to struct zfcp_fsf_req
 104  */
 105 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
 106 {
 107         if (likely(req->pool)) {
 108                 mempool_free(req, req->pool);
 109                 return;
 110         }
 111
 112         if (req->qtcb) {
 113                 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
 114                 return;
 115         }
 116 }
 117
 118 /**
 119  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 120  * @adapter: pointer to struct zfcp_adapter
 121  *
 122  * Never ever call this without shutting down the adapter first.
 123  * Otherwise the adapter would continue using and corrupting s390 storage.
 124  * Included BUG_ON() call to ensure this is done.
 125  * ERP is supposed to be the only user of this function.
 126  */
 127 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 128 {
 129         struct zfcp_fsf_req *req, *tmp;
 130         unsigned long flags;
 131         LIST_HEAD(remove_queue);
 132         unsigned int i;
 133
 134         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 135         spin_lock_irqsave(&adapter->req_list_lock, flags);
 136         for (i = 0; i < REQUEST_LIST_SIZE; i++)
 137                 list_splice_init(&adapter->req_list[i], &remove_queue);
 138         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 139
 140         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 141                 list_del(&req->list);
 142                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 143                 zfcp_fsf_req_complete(req);
 144         }
 145 }
 146
 147 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 148 {
 149         struct fsf_status_read_buffer *sr_buf = req->data;
 150         struct zfcp_adapter *adapter = req->adapter;
 151         struct zfcp_port *port;
 152         int d_id = sr_buf->d_id & ZFCP_DID_MASK;
 153         unsigned long flags;
 154
 155         read_lock_irqsave(&zfcp_data.config_lock, flags);
 156         list_for_each_entry(port, &adapter->port_list_head, list)
 157                 if (port->d_id == d_id) {
 158                         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 159                         switch (sr_buf->status_subtype) {
 160                         case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
 161                                 zfcp_erp_port_reopen(port, 0, 101, req);
 162                                 break;
 163                         case FSF_STATUS_READ_SUB_ERROR_PORT:
 164                                 zfcp_erp_port_shutdown(port, 0, 122, req);
 165                                 break;
 166                         }
 167                         return;
 168                 }
 169         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 170 }
 171
 172 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
 173                                          struct fsf_link_down_info *link_down)
 174 {
 175         struct zfcp_adapter *adapter = req->adapter;
 176
 177         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 178                 return;
 179
 180         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 181
 182         if (!link_down)
 183                 goto out;
 184
 185         switch (link_down->error_code) {
 186         case FSF_PSQ_LINK_NO_LIGHT:
 187                 dev_warn(&req->adapter->ccw_device->dev,
 188                          "There is no light signal from the local "
 189                          "fibre channel cable\n");
 190                 break;
 191         case FSF_PSQ_LINK_WRAP_PLUG:
 192                 dev_warn(&req->adapter->ccw_device->dev,
 193                          "There is a wrap plug instead of a fibre "
 194                          "channel cable\n");
 195                 break;
 196         case FSF_PSQ_LINK_NO_FCP:
 197                 dev_warn(&req->adapter->ccw_device->dev,
 198                          "The adjacent fibre channel node does not "
 199                          "support FCP\n");
 200                 break;
 201         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 202                 dev_warn(&req->adapter->ccw_device->dev,
 203                          "The FCP device is suspended because of a "
 204                          "firmware update\n");
 205                 break;
 206         case FSF_PSQ_LINK_INVALID_WWPN:
 207                 dev_warn(&req->adapter->ccw_device->dev,
 208                          "The FCP device detected a WWPN that is "
 209                          "duplicate or not valid\n");
 210                 break;
 211         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 212                 dev_warn(&req->adapter->ccw_device->dev,
 213                          "The fibre channel fabric does not support NPIV\n");
 214                 break;
 215         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 216                 dev_warn(&req->adapter->ccw_device->dev,
 217                          "The FCP adapter cannot support more NPIV ports\n");
 218                 break;
 219         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 220                 dev_warn(&req->adapter->ccw_device->dev,
 221                          "The adjacent switch cannot support "
 222                          "more NPIV ports\n");
 223                 break;
 224         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 225                 dev_warn(&req->adapter->ccw_device->dev,
 226                          "The FCP adapter could not log in to the "
 227                          "fibre channel fabric\n");
 228                 break;
 229         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 230                 dev_warn(&req->adapter->ccw_device->dev,
 231                          "The WWPN assignment file on the FCP adapter "
 232                          "has been damaged\n");
 233                 break;
 234         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 235                 dev_warn(&req->adapter->ccw_device->dev,
 236                          "The mode table on the FCP adapter "
 237                          "has been damaged\n");
 238                 break;
 239         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 240                 dev_warn(&req->adapter->ccw_device->dev,
 241                          "All NPIV ports on the FCP adapter have "
 242                          "been assigned\n");
 243                 break;
 244         default:
 245                 dev_warn(&req->adapter->ccw_device->dev,
 246                          "The link between the FCP adapter and "
 247                          "the FC fabric is down\n");
 248         }
 249 out:
 250         zfcp_erp_adapter_failed(adapter, id, req);
 251 }
 252
 253 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 254 {
 255         struct fsf_status_read_buffer *sr_buf = req->data;
 256         struct fsf_link_down_info *ldi =
 257                 (struct fsf_link_down_info *) &sr_buf->payload;
 258
 259         switch (sr_buf->status_subtype) {
 260         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 261                 zfcp_fsf_link_down_info_eval(req, 38, ldi);
 262                 break;
 263         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 264                 zfcp_fsf_link_down_info_eval(req, 39, ldi);
 265                 break;
 266         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 267                 zfcp_fsf_link_down_info_eval(req, 40, NULL);
 268         };
 269 }
 270
 271 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 272 {
 273         struct zfcp_adapter *adapter = req->adapter;
 274         struct fsf_status_read_buffer *sr_buf = req->data;
 275
 276         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 277                 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
 278                 mempool_free(sr_buf, adapter->pool.data_status_read);
 279                 zfcp_fsf_req_free(req);
 280                 return;
 281         }
 282
 283         zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
 284
 285         switch (sr_buf->status_type) {
 286         case FSF_STATUS_READ_PORT_CLOSED:
 287                 zfcp_fsf_status_read_port_closed(req);
 288                 break;
 289         case FSF_STATUS_READ_INCOMING_ELS:
 290                 zfcp_fc_incoming_els(req);
 291                 break;
 292         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 293                 break;
 294         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 295                 dev_warn(&adapter->ccw_device->dev,
 296                          "The error threshold for checksum statistics "
 297                          "has been exceeded\n");
 298                 zfcp_hba_dbf_event_berr(adapter, req);
 299                 break;
 300         case FSF_STATUS_READ_LINK_DOWN:
 301                 zfcp_fsf_status_read_link_down(req);
 302                 break;
 303         case FSF_STATUS_READ_LINK_UP:
 304                 dev_info(&adapter->ccw_device->dev,
 305                          "The local link has been restored\n");
 306                 /* All ports should be marked as ready to run again */
 307                 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
 308                                                ZFCP_STATUS_COMMON_RUNNING,
 309                                                ZFCP_SET);
 310                 zfcp_erp_adapter_reopen(adapter,
 311                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 312                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 313                                         102, req);
 314                 break;
 315         case FSF_STATUS_READ_NOTIFICATION_LOST:
 316                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 317                         zfcp_erp_adapter_access_changed(adapter, 135, req);
 318                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 319                         schedule_work(&adapter->scan_work);
 320                 break;
 321         case FSF_STATUS_READ_CFDC_UPDATED:
 322                 zfcp_erp_adapter_access_changed(adapter, 136, req);
 323                 break;
 324         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 325                 adapter->adapter_features = sr_buf->payload.word[0];
 326                 break;
 327         }
 328
 329         mempool_free(sr_buf, adapter->pool.data_status_read);
 330         zfcp_fsf_req_free(req);
 331
 332         atomic_inc(&adapter->stat_miss);
 333         queue_work(zfcp_data.work_queue, &adapter->stat_work);
 334 }
 335
 336 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 337 {
 338         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 339         case FSF_SQ_FCP_RSP_AVAILABLE:
 340         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 341         case FSF_SQ_NO_RETRY_POSSIBLE:
 342         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 343                 return;
 344         case FSF_SQ_COMMAND_ABORTED:
 345                 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
 346                 break;
 347         case FSF_SQ_NO_RECOM:
 348                 dev_err(&req->adapter->ccw_device->dev,
 349                         "The FCP adapter reported a problem "
 350                         "that cannot be recovered\n");
 351                 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
 352                 break;
 353         }
 354         /* all non-return stats set FSFREQ_ERROR*/
 355         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 356 }
 357
 358 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 359 {
 360         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 361                 return;
 362
 363         switch (req->qtcb->header.fsf_status) {
 364         case FSF_UNKNOWN_COMMAND:
 365                 dev_err(&req->adapter->ccw_device->dev,
 366                         "The FCP adapter does not recognize the command 0x%x\n",
 367                         req->qtcb->header.fsf_command);
 368                 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
 369                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 370                 break;
 371         case FSF_ADAPTER_STATUS_AVAILABLE:
 372                 zfcp_fsf_fsfstatus_qual_eval(req);
 373                 break;
 374         }
 375 }
 376
 377 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 378 {
 379         struct zfcp_adapter *adapter = req->adapter;
 380         struct fsf_qtcb *qtcb = req->qtcb;
 381         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 382
 383         zfcp_hba_dbf_event_fsf_response(req);
 384
 385         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 386                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 387                         ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
 388                 return;
 389         }
 390
 391         switch (qtcb->prefix.prot_status) {
 392         case FSF_PROT_GOOD:
 393         case FSF_PROT_FSF_STATUS_PRESENTED:
 394                 return;
 395         case FSF_PROT_QTCB_VERSION_ERROR:
 396                 dev_err(&adapter->ccw_device->dev,
 397                         "QTCB version 0x%x not supported by FCP adapter "
 398                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 399                         psq->word[0], psq->word[1]);
 400                 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
 401                 break;
 402         case FSF_PROT_ERROR_STATE:
 403         case FSF_PROT_SEQ_NUMB_ERROR:
 404                 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
 405                 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 406                 break;
 407         case FSF_PROT_UNSUPP_QTCB_TYPE:
 408                 dev_err(&adapter->ccw_device->dev,
 409                         "The QTCB type is not supported by the FCP adapter\n");
 410                 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
 411                 break;
 412         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 413                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 414                                 &adapter->status);
 415                 break;
 416         case FSF_PROT_DUPLICATE_REQUEST_ID:
 417                 dev_err(&adapter->ccw_device->dev,
 418                         "0x%Lx is an ambiguous request identifier\n",
 419                         (unsigned long long)qtcb->bottom.support.req_handle);
 420                 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
 421                 break;
 422         case FSF_PROT_LINK_DOWN:
 423                 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
 424                 /* FIXME: reopening adapter now? better wait for link up */
 425                 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
 426                 break;
 427         case FSF_PROT_REEST_QUEUE:
 428                 /* All ports should be marked as ready to run again */
 429                 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
 430                                                ZFCP_STATUS_COMMON_RUNNING,
 431                                                ZFCP_SET);
 432                 zfcp_erp_adapter_reopen(adapter,
 433                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 434                                         ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
 435                 break;
 436         default:
 437                 dev_err(&adapter->ccw_device->dev,
 438                         "0x%x is not a valid transfer protocol status\n",
 439                         qtcb->prefix.prot_status);
 440                 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
 441         }
 442         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 443 }
 444
 445 /**
 446  * zfcp_fsf_req_complete - process completion of a FSF request
 447  * @fsf_req: The FSF request that has been completed.
 448  *
 449  * When a request has been completed either from the FCP adapter,
 450  * or it has been dismissed due to a queue shutdown, this function
 451  * is called to process the completion status and trigger further
 452  * events related to the FSF request.
 453  */
 454 void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 455 {
 456         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 457                 zfcp_fsf_status_read_handler(req);
 458                 return;
 459         }
 460
 461         del_timer(&req->timer);
 462         zfcp_fsf_protstatus_eval(req);
 463         zfcp_fsf_fsfstatus_eval(req);
 464         req->handler(req);
 465
 466         if (req->erp_action)
 467                 zfcp_erp_notify(req->erp_action, 0);
 468         req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
 469
 470         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 471                 zfcp_fsf_req_free(req);
 472         else
 473         /* notify initiator waiting for the requests completion */
 474         /*
 475          * FIXME: Race! We must not access fsf_req here as it might have been
 476          * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
 477          * flag. It's an improbable case. But, we have the same paranoia for
 478          * the cleanup flag already.
 479          * Might better be handled using complete()?
 480          * (setting the flag and doing wakeup ought to be atomic
 481          *  with regard to checking the flag as long as waitqueue is
 482          *  part of the to be released structure)
 483          */
 484                 wake_up(&req->completion_wq);
 485 }
 486
 487 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 488 {
 489         struct fsf_qtcb_bottom_config *bottom;
 490         struct zfcp_adapter *adapter = req->adapter;
 491         struct Scsi_Host *shost = adapter->scsi_host;
 492
 493         bottom = &req->qtcb->bottom.config;
 494
 495         if (req->data)
 496                 memcpy(req->data, bottom, sizeof(*bottom));
 497
 498         fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
 499         fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
 500         fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
 501         fc_host_speed(shost) = bottom->fc_link_speed;
 502         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 503
 504         adapter->hydra_version = bottom->adapter_type;
 505         adapter->timer_ticks = bottom->timer_interval;
 506
 507         if (fc_host_permanent_port_name(shost) == -1)
 508                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 509
 510         switch (bottom->fc_topology) {
 511         case FSF_TOPO_P2P:
 512                 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
 513                 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
 514                 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
 515                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 516                 break;
 517         case FSF_TOPO_FABRIC:
 518                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 519                 break;
 520         case FSF_TOPO_AL:
 521                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 522         default:
 523                 dev_err(&adapter->ccw_device->dev,
 524                         "Unknown or unsupported arbitrated loop "
 525                         "fibre channel topology detected\n");
 526                 zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
 527                 return -EIO;
 528         }
 529
 530         return 0;
 531 }
 532
 533 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 534 {
 535         struct zfcp_adapter *adapter = req->adapter;
 536         struct fsf_qtcb *qtcb = req->qtcb;
 537         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 538         struct Scsi_Host *shost = adapter->scsi_host;
 539
 540         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 541                 return;
 542
 543         adapter->fsf_lic_version = bottom->lic_version;
 544         adapter->adapter_features = bottom->adapter_features;
 545         adapter->connection_features = bottom->connection_features;
 546         adapter->peer_wwpn = 0;
 547         adapter->peer_wwnn = 0;
 548         adapter->peer_d_id = 0;
 549
 550         switch (qtcb->header.fsf_status) {
 551         case FSF_GOOD:
 552                 if (zfcp_fsf_exchange_config_evaluate(req))
 553                         return;
 554
 555                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 556                         dev_err(&adapter->ccw_device->dev,
 557                                 "FCP adapter maximum QTCB size (%d bytes) "
 558                                 "is too small\n",
 559                                 bottom->max_qtcb_size);
 560                         zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
 561                         return;
 562                 }
 563                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 564                                 &adapter->status);
 565                 break;
 566         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 567                 fc_host_node_name(shost) = 0;
 568                 fc_host_port_name(shost) = 0;
 569                 fc_host_port_id(shost) = 0;
 570                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 571                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 572                 adapter->hydra_version = 0;
 573
 574                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 575                                 &adapter->status);
 576
 577                 zfcp_fsf_link_down_info_eval(req, 42,
 578                         &qtcb->header.fsf_status_qual.link_down_info);
 579                 break;
 580         default:
 581                 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
 582                 return;
 583         }
 584
 585         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 586                 adapter->hardware_version = bottom->hardware_version;
 587                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 588                        min(FC_SERIAL_NUMBER_SIZE, 17));
 589                 EBCASC(fc_host_serial_number(shost),
 590                        min(FC_SERIAL_NUMBER_SIZE, 17));
 591         }
 592
 593         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 594                 dev_err(&adapter->ccw_device->dev,
 595                         "The FCP adapter only supports newer "
 596                         "control block versions\n");
 597                 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
 598                 return;
 599         }
 600         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 601                 dev_err(&adapter->ccw_device->dev,
 602                         "The FCP adapter only supports older "
 603                         "control block versions\n");
 604                 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
 605         }
 606 }
 607
 608 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 609 {
 610         struct zfcp_adapter *adapter = req->adapter;
 611         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 612         struct Scsi_Host *shost = adapter->scsi_host;
 613
 614         if (req->data)
 615                 memcpy(req->data, bottom, sizeof(*bottom));
 616
 617         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
 618                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 619         else
 620                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 621         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 622         fc_host_supported_speeds(shost) = bottom->supported_speed;
 623 }
 624
 625 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 626 {
 627         struct fsf_qtcb *qtcb = req->qtcb;
 628
 629         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 630                 return;
 631
 632         switch (qtcb->header.fsf_status) {
 633         case FSF_GOOD:
 634                 zfcp_fsf_exchange_port_evaluate(req);
 635                 break;
 636         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 637                 zfcp_fsf_exchange_port_evaluate(req);
 638                 zfcp_fsf_link_down_info_eval(req, 43,
 639                         &qtcb->header.fsf_status_qual.link_down_info);
 640                 break;
 641         }
 642 }
 643
 644 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
 645 {
 646         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 647
 648         spin_lock_bh(&adapter->req_q_lock);
 649         if (atomic_read(&req_q->count))
 650                 return 1;
 651         spin_unlock_bh(&adapter->req_q_lock);
 652         return 0;
 653 }
 654
 655 static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
 656 {
 657         unsigned int count = atomic_read(&adapter->req_q.count);
 658         if (!count)
 659                 atomic_inc(&adapter->qdio_outb_full);
 660         return count > 0;
 661 }
 662
 663 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
 664 {
 665         long ret;
 666
 667         spin_unlock_bh(&adapter->req_q_lock);
 668         ret = wait_event_interruptible_timeout(adapter->request_wq,
 669                                         zfcp_fsf_sbal_check(adapter), 5 * HZ);
 670         if (ret > 0)
 671                 return 0;
 672         if (!ret)
 673                 atomic_inc(&adapter->qdio_outb_full);
 674
 675         spin_lock_bh(&adapter->req_q_lock);
 676         return -EIO;
 677 }
 678
 679 static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
 680 {
 681         struct zfcp_fsf_req *req;
 682         req = mempool_alloc(pool, GFP_ATOMIC);
 683         if (!req)
 684                 return NULL;
 685         memset(req, 0, sizeof(*req));
 686         req->pool = pool;
 687         return req;
 688 }
 689
 690 static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
 691 {
 692         struct zfcp_fsf_req_qtcb *qtcb;
 693
 694         if (likely(pool))
 695                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 696         else
 697                 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
 698                                         GFP_ATOMIC);
 699         if (unlikely(!qtcb))
 700                 return NULL;
 701
 702         memset(qtcb, 0, sizeof(*qtcb));
 703         qtcb->fsf_req.qtcb = &qtcb->qtcb;
 704         qtcb->fsf_req.pool = pool;
 705
 706         return &qtcb->fsf_req;
 707 }
 708
 709 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
 710                                                 u32 fsf_cmd, int req_flags,
 711                                                 mempool_t *pool)
 712 {
 713         struct qdio_buffer_element *sbale;
 714
 715         struct zfcp_fsf_req *req;
 716         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 717
 718         if (req_flags & ZFCP_REQ_NO_QTCB)
 719                 req = zfcp_fsf_alloc_noqtcb(pool);
 720         else
 721                 req = zfcp_fsf_alloc_qtcb(pool);
 722
 723         if (unlikely(!req))
 724                 return ERR_PTR(-EIO);
 725
 726         if (adapter->req_no == 0)
 727                 adapter->req_no++;
 728
 729         INIT_LIST_HEAD(&req->list);
 730         init_timer(&req->timer);
 731         init_waitqueue_head(&req->completion_wq);
 732
 733         req->adapter = adapter;
 734         req->fsf_command = fsf_cmd;
 735         req->req_id = adapter->req_no++;
 736         req->sbal_number = 1;
 737         req->sbal_first = req_q->first;
 738         req->sbal_last = req_q->first;
 739         req->sbale_curr = 1;
 740
 741         sbale = zfcp_qdio_sbale_req(req);
 742         sbale[0].addr = (void *) req->req_id;
 743         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 744
 745         if (likely(req->qtcb)) {
 746                 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
 747                 req->qtcb->prefix.req_id = req->req_id;
 748                 req->qtcb->prefix.ulp_info = 26;
 749                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 750                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 751                 req->qtcb->header.req_handle = req->req_id;
 752                 req->qtcb->header.fsf_command = req->fsf_command;
 753                 req->seq_no = adapter->fsf_req_seq_no;
 754                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 755                 sbale[1].addr = (void *) req->qtcb;
 756                 sbale[1].length = sizeof(struct fsf_qtcb);
 757         }
 758
 759         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
 760                 zfcp_fsf_req_free(req);
 761                 return ERR_PTR(-EIO);
 762         }
 763
 764         if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
 765                 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 766
 767         return req;
 768 }
 769
 770 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 771 {
 772         struct zfcp_adapter *adapter = req->adapter;
 773         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(&adapter->req_q.count);
 783         req->issued = get_clock();
 784         if (zfcp_qdio_send(req)) {
 785                 del_timer(&req->timer);
 786                 spin_lock_irqsave(&adapter->req_list_lock, flags);
 787                 /* lookup request again, list might have changed */
 788                 if (zfcp_reqlist_find_safe(adapter, req))
 789                         zfcp_reqlist_remove(adapter, req);
 790                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 791                 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
 792                 return -EIO;
 793         }
 794
 795         /* Don't increase for unsolicited status */
 796         if (req->qtcb)
 797                 adapter->fsf_req_seq_no++;
 798
 799         return 0;
 800 }
 801
 802 /**
 803  * zfcp_fsf_status_read - send status read request
 804  * @adapter: pointer to struct zfcp_adapter
 805  * @req_flags: request flags
 806  * Returns: 0 on success, ERROR otherwise
 807  */
 808 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
 809 {
 810         struct zfcp_fsf_req *req;
 811         struct fsf_status_read_buffer *sr_buf;
 812         struct qdio_buffer_element *sbale;
 813         int retval = -EIO;
 814
 815         spin_lock_bh(&adapter->req_q_lock);
 816         if (zfcp_fsf_req_sbal_get(adapter))
 817                 goto out;
 818
 819         req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 820                                   ZFCP_REQ_NO_QTCB,
 821                                   adapter->pool.fsf_req_status_read);
 822         if (IS_ERR(req)) {
 823                 retval = PTR_ERR(req);
 824                 goto out;
 825         }
 826
 827         sbale = zfcp_qdio_sbale_req(req);
 828         sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
 829         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 830         req->sbale_curr = 2;
 831
 832         sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
 833         if (!sr_buf) {
 834                 retval = -ENOMEM;
 835                 goto failed_buf;
 836         }
 837         memset(sr_buf, 0, sizeof(*sr_buf));
 838         req->data = sr_buf;
 839         sbale = zfcp_qdio_sbale_curr(req);
 840         sbale->addr = (void *) sr_buf;
 841         sbale->length = sizeof(*sr_buf);
 842
 843         retval = zfcp_fsf_req_send(req);
 844         if (retval)
 845                 goto failed_req_send;
 846
 847         goto out;
 848
 849 failed_req_send:
 850         mempool_free(sr_buf, adapter->pool.data_status_read);
 851 failed_buf:
 852         zfcp_fsf_req_free(req);
 853         zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 854 out:
 855         spin_unlock_bh(&adapter->req_q_lock);
 856         return retval;
 857 }
 858
 859 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 860 {
 861         struct zfcp_unit *unit = req->data;
 862         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 863
 864         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 865                 return;
 866
 867         switch (req->qtcb->header.fsf_status) {
 868         case FSF_PORT_HANDLE_NOT_VALID:
 869                 if (fsq->word[0] == fsq->word[1]) {
 870                         zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
 871                                                 req);
 872                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 873                 }
 874                 break;
 875         case FSF_LUN_HANDLE_NOT_VALID:
 876                 if (fsq->word[0] == fsq->word[1]) {
 877                         zfcp_erp_port_reopen(unit->port, 0, 105, req);
 878                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 879                 }
 880                 break;
 881         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 882                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 883                 break;
 884         case FSF_PORT_BOXED:
 885                 zfcp_erp_port_boxed(unit->port, 47, req);
 886                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 887                                ZFCP_STATUS_FSFREQ_RETRY;
 888                 break;
 889         case FSF_LUN_BOXED:
 890                 zfcp_erp_unit_boxed(unit, 48, req);
 891                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 892                                ZFCP_STATUS_FSFREQ_RETRY;
 893                 break;
 894         case FSF_ADAPTER_STATUS_AVAILABLE:
 895                 switch (fsq->word[0]) {
 896                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 897                         zfcp_test_link(unit->port);
 898                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 899                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 900                         break;
 901                 }
 902                 break;
 903         case FSF_GOOD:
 904                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 905                 break;
 906         }
 907 }
 908
 909 /**
 910  * zfcp_fsf_abort_fcp_command - abort running SCSI command
 911  * @old_req_id: unsigned long
 912  * @adapter: pointer to struct zfcp_adapter
 913  * @unit: pointer to struct zfcp_unit
 914  * @req_flags: integer specifying the request flags
 915  * Returns: pointer to struct zfcp_fsf_req
 916  *
 917  * FIXME(design): should be watched by a timeout !!!
 918  */
 919
 920 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 921                                                 struct zfcp_adapter *adapter,
 922                                                 struct zfcp_unit *unit,
 923                                                 int req_flags)
 924 {
 925         struct qdio_buffer_element *sbale;
 926         struct zfcp_fsf_req *req = NULL;
 927
 928         spin_lock(&adapter->req_q_lock);
 929         if (!zfcp_fsf_sbal_available(adapter))
 930                 goto out;
 931         req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
 932                                   req_flags, adapter->pool.fsf_req_abort);
 933         if (IS_ERR(req)) {
 934                 req = NULL;
 935                 goto out;
 936         }
 937
 938         if (unlikely(!(atomic_read(&unit->status) &
 939                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 940                 goto out_error_free;
 941
 942         sbale = zfcp_qdio_sbale_req(req);
 943         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 944         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 945
 946         req->data = unit;
 947         req->handler = zfcp_fsf_abort_fcp_command_handler;
 948         req->qtcb->header.lun_handle = unit->handle;
 949         req->qtcb->header.port_handle = unit->port->handle;
 950         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 951
 952         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 953         if (!zfcp_fsf_req_send(req))
 954                 goto out;
 955
 956 out_error_free:
 957         zfcp_fsf_req_free(req);
 958         req = NULL;
 959 out:
 960         spin_unlock(&adapter->req_q_lock);
 961         return req;
 962 }
 963
 964 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 965 {
 966         struct zfcp_adapter *adapter = req->adapter;
 967         struct zfcp_send_ct *send_ct = req->data;
 968         struct fsf_qtcb_header *header = &req->qtcb->header;
 969
 970         send_ct->status = -EINVAL;
 971
 972         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 973                 goto skip_fsfstatus;
 974
 975         switch (header->fsf_status) {
 976         case FSF_GOOD:
 977                 zfcp_san_dbf_event_ct_response(req);
 978                 send_ct->status = 0;
 979                 break;
 980         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 981                 zfcp_fsf_class_not_supp(req);
 982                 break;
 983         case FSF_ADAPTER_STATUS_AVAILABLE:
 984                 switch (header->fsf_status_qual.word[0]){
 985                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 986                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 987                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 988                         break;
 989                 }
 990                 break;
 991         case FSF_ACCESS_DENIED:
 992                 break;
 993         case FSF_PORT_BOXED:
 994                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 995                                ZFCP_STATUS_FSFREQ_RETRY;
 996                 break;
 997         case FSF_PORT_HANDLE_NOT_VALID:
 998                 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
 999         case FSF_GENERIC_COMMAND_REJECTED:
1000         case FSF_PAYLOAD_SIZE_MISMATCH:
1001         case FSF_REQUEST_SIZE_TOO_LARGE:
1002         case FSF_RESPONSE_SIZE_TOO_LARGE:
1003         case FSF_SBAL_MISMATCH:
1004                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1005                 break;
1006         }
1007
1008 skip_fsfstatus:
1009         if (send_ct->handler)
1010                 send_ct->handler(send_ct->handler_data);
1011 }
1012
1013 static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1014                                 struct scatterlist *sg_req,
1015                                 struct scatterlist *sg_resp, int max_sbals)
1016 {
1017         int bytes;
1018
1019         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1020                                         sg_req, max_sbals);
1021         if (bytes <= 0)
1022                 return -ENOMEM;
1023         req->qtcb->bottom.support.req_buf_length = bytes;
1024         req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1025
1026         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1027                                         sg_resp, max_sbals);
1028         if (bytes <= 0)
1029                 return -ENOMEM;
1030         req->qtcb->bottom.support.resp_buf_length = bytes;
1031
1032         return 0;
1033 }
1034
1035 /**
1036  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1037  * @ct: pointer to struct zfcp_send_ct with data for request
1038  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1039  * @erp_action: if non-null the Generic Service request sent within ERP
1040  */
1041 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1042                      struct zfcp_erp_action *erp_action)
1043 {
1044         struct zfcp_wka_port *wka_port = ct->wka_port;
1045         struct zfcp_adapter *adapter = wka_port->adapter;
1046         struct zfcp_fsf_req *req;
1047         int ret = -EIO;
1048
1049         spin_lock_bh(&adapter->req_q_lock);
1050         if (zfcp_fsf_req_sbal_get(adapter))
1051                 goto out;
1052
1053         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1054                                   ZFCP_REQ_AUTO_CLEANUP, pool);
1055         if (IS_ERR(req)) {
1056                 ret = PTR_ERR(req);
1057                 goto out;
1058         }
1059
1060         ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1061                                    FSF_MAX_SBALS_PER_REQ);
1062         if (ret)
1063                 goto failed_send;
1064
1065         req->handler = zfcp_fsf_send_ct_handler;
1066         req->qtcb->header.port_handle = wka_port->handle;
1067         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1068         req->qtcb->bottom.support.timeout = ct->timeout;
1069         req->data = ct;
1070
1071         zfcp_san_dbf_event_ct_request(req);
1072
1073         if (erp_action) {
1074                 erp_action->fsf_req = req;
1075                 req->erp_action = erp_action;
1076                 zfcp_fsf_start_erp_timer(req);
1077         } else
1078                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1079
1080         ret = zfcp_fsf_req_send(req);
1081         if (ret)
1082                 goto failed_send;
1083
1084         goto out;
1085
1086 failed_send:
1087         zfcp_fsf_req_free(req);
1088         if (erp_action)
1089                 erp_action->fsf_req = NULL;
1090 out:
1091         spin_unlock_bh(&adapter->req_q_lock);
1092         return ret;
1093 }
1094
1095 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1096 {
1097         struct zfcp_send_els *send_els = req->data;
1098         struct zfcp_port *port = send_els->port;
1099         struct fsf_qtcb_header *header = &req->qtcb->header;
1100
1101         send_els->status = -EINVAL;
1102
1103         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1104                 goto skip_fsfstatus;
1105
1106         switch (header->fsf_status) {
1107         case FSF_GOOD:
1108                 zfcp_san_dbf_event_els_response(req);
1109                 send_els->status = 0;
1110                 break;
1111         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1112                 zfcp_fsf_class_not_supp(req);
1113                 break;
1114         case FSF_ADAPTER_STATUS_AVAILABLE:
1115                 switch (header->fsf_status_qual.word[0]){
1116                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1117                         if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1118                                 zfcp_test_link(port);
1119                         /*fall through */
1120                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1121                 case FSF_SQ_RETRY_IF_POSSIBLE:
1122                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1123                         break;
1124                 }
1125                 break;
1126         case FSF_ELS_COMMAND_REJECTED:
1127         case FSF_PAYLOAD_SIZE_MISMATCH:
1128         case FSF_REQUEST_SIZE_TOO_LARGE:
1129         case FSF_RESPONSE_SIZE_TOO_LARGE:
1130                 break;
1131         case FSF_ACCESS_DENIED:
1132                 zfcp_fsf_access_denied_port(req, port);
1133                 break;
1134         case FSF_SBAL_MISMATCH:
1135                 /* should never occure, avoided in zfcp_fsf_send_els */
1136                 /* fall through */
1137         default:
1138                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1139                 break;
1140         }
1141 skip_fsfstatus:
1142         if (send_els->handler)
1143                 send_els->handler(send_els->handler_data);
1144 }
1145
1146 /**
1147  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1148  * @els: pointer to struct zfcp_send_els with data for the command
1149  */
1150 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1151 {
1152         struct zfcp_fsf_req *req;
1153         struct zfcp_adapter *adapter = els->adapter;
1154         struct fsf_qtcb_bottom_support *bottom;
1155         int ret = -EIO;
1156
1157         if (unlikely(!(atomic_read(&els->port->status) &
1158                        ZFCP_STATUS_COMMON_UNBLOCKED)))
1159                 return -EBUSY;
1160
1161         spin_lock(&adapter->req_q_lock);
1162         if (!zfcp_fsf_sbal_available(adapter))
1163                 goto out;
1164         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1165                                   ZFCP_REQ_AUTO_CLEANUP, NULL);
1166         if (IS_ERR(req)) {
1167                 ret = PTR_ERR(req);
1168                 goto out;
1169         }
1170
1171         ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1172
1173         if (ret)
1174                 goto failed_send;
1175
1176         bottom = &req->qtcb->bottom.support;
1177         req->handler = zfcp_fsf_send_els_handler;
1178         bottom->d_id = els->d_id;
1179         bottom->service_class = FSF_CLASS_3;
1180         bottom->timeout = 2 * R_A_TOV;
1181         req->data = els;
1182
1183         zfcp_san_dbf_event_els_request(req);
1184
1185         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1186         ret = zfcp_fsf_req_send(req);
1187         if (ret)
1188                 goto failed_send;
1189
1190         goto out;
1191
1192 failed_send:
1193         zfcp_fsf_req_free(req);
1194 out:
1195         spin_unlock(&adapter->req_q_lock);
1196         return ret;
1197 }
1198
1199 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1200 {
1201         struct qdio_buffer_element *sbale;
1202         struct zfcp_fsf_req *req;
1203         struct zfcp_adapter *adapter = erp_action->adapter;
1204         int retval = -EIO;
1205
1206         spin_lock_bh(&adapter->req_q_lock);
1207         if (!zfcp_fsf_sbal_available(adapter))
1208                 goto out;
1209         req = zfcp_fsf_req_create(adapter,
1210                                   FSF_QTCB_EXCHANGE_CONFIG_DATA,
1211                                   ZFCP_REQ_AUTO_CLEANUP,
1212                                   adapter->pool.fsf_req_erp);
1213         if (IS_ERR(req)) {
1214                 retval = PTR_ERR(req);
1215                 goto out;
1216         }
1217
1218         sbale = zfcp_qdio_sbale_req(req);
1219         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1220         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1221
1222         req->qtcb->bottom.config.feature_selection =
1223                         FSF_FEATURE_CFDC |
1224                         FSF_FEATURE_LUN_SHARING |
1225                         FSF_FEATURE_NOTIFICATION_LOST |
1226                         FSF_FEATURE_UPDATE_ALERT;
1227         req->erp_action = erp_action;
1228         req->handler = zfcp_fsf_exchange_config_data_handler;
1229         erp_action->fsf_req = req;
1230
1231         zfcp_fsf_start_erp_timer(req);
1232         retval = zfcp_fsf_req_send(req);
1233         if (retval) {
1234                 zfcp_fsf_req_free(req);
1235                 erp_action->fsf_req = NULL;
1236         }
1237 out:
1238         spin_unlock_bh(&adapter->req_q_lock);
1239         return retval;
1240 }
1241
1242 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1243                                        struct fsf_qtcb_bottom_config *data)
1244 {
1245         struct qdio_buffer_element *sbale;
1246         struct zfcp_fsf_req *req = NULL;
1247         int retval = -EIO;
1248
1249         spin_lock_bh(&adapter->req_q_lock);
1250         if (zfcp_fsf_req_sbal_get(adapter))
1251                 goto out;
1252
1253         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1254                                   0, NULL);
1255         if (IS_ERR(req)) {
1256                 retval = PTR_ERR(req);
1257                 goto out;
1258         }
1259
1260         sbale = zfcp_qdio_sbale_req(req);
1261         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1262         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1263         req->handler = zfcp_fsf_exchange_config_data_handler;
1264
1265         req->qtcb->bottom.config.feature_selection =
1266                         FSF_FEATURE_CFDC |
1267                         FSF_FEATURE_LUN_SHARING |
1268                         FSF_FEATURE_NOTIFICATION_LOST |
1269                         FSF_FEATURE_UPDATE_ALERT;
1270
1271         if (data)
1272                 req->data = data;
1273
1274         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1275         retval = zfcp_fsf_req_send(req);
1276 out:
1277         spin_unlock_bh(&adapter->req_q_lock);
1278         if (!retval)
1279                 wait_event(req->completion_wq,
1280                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1281
1282         zfcp_fsf_req_free(req);
1283
1284         return retval;
1285 }
1286
1287 /**
1288  * zfcp_fsf_exchange_port_data - request information about local port
1289  * @erp_action: ERP action for the adapter for which port data is requested
1290  * Returns: 0 on success, error otherwise
1291  */
1292 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1293 {
1294         struct qdio_buffer_element *sbale;
1295         struct zfcp_fsf_req *req;
1296         struct zfcp_adapter *adapter = erp_action->adapter;
1297         int retval = -EIO;
1298
1299         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1300                 return -EOPNOTSUPP;
1301
1302         spin_lock_bh(&adapter->req_q_lock);
1303         if (!zfcp_fsf_sbal_available(adapter))
1304                 goto out;
1305         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1306                                   ZFCP_REQ_AUTO_CLEANUP,
1307                                   adapter->pool.fsf_req_erp);
1308         if (IS_ERR(req)) {
1309                 retval = PTR_ERR(req);
1310                 goto out;
1311         }
1312
1313         sbale = zfcp_qdio_sbale_req(req);
1314         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1315         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1316
1317         req->handler = zfcp_fsf_exchange_port_data_handler;
1318         req->erp_action = erp_action;
1319         erp_action->fsf_req = req;
1320
1321         zfcp_fsf_start_erp_timer(req);
1322         retval = zfcp_fsf_req_send(req);
1323         if (retval) {
1324                 zfcp_fsf_req_free(req);
1325                 erp_action->fsf_req = NULL;
1326         }
1327 out:
1328         spin_unlock_bh(&adapter->req_q_lock);
1329         return retval;
1330 }
1331
1332 /**
1333  * zfcp_fsf_exchange_port_data_sync - request information about local port
1334  * @adapter: pointer to struct zfcp_adapter
1335  * @data: pointer to struct fsf_qtcb_bottom_port
1336  * Returns: 0 on success, error otherwise
1337  */
1338 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1339                                      struct fsf_qtcb_bottom_port *data)
1340 {
1341         struct qdio_buffer_element *sbale;
1342         struct zfcp_fsf_req *req = NULL;
1343         int retval = -EIO;
1344
1345         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1346                 return -EOPNOTSUPP;
1347
1348         spin_lock_bh(&adapter->req_q_lock);
1349         if (!zfcp_fsf_sbal_available(adapter))
1350                 goto out;
1351
1352         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1353                                   NULL);
1354         if (IS_ERR(req)) {
1355                 retval = PTR_ERR(req);
1356                 goto out;
1357         }
1358
1359         if (data)
1360                 req->data = data;
1361
1362         sbale = zfcp_qdio_sbale_req(req);
1363         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1364         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1365
1366         req->handler = zfcp_fsf_exchange_port_data_handler;
1367         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1368         retval = zfcp_fsf_req_send(req);
1369 out:
1370         spin_unlock_bh(&adapter->req_q_lock);
1371         if (!retval)
1372                 wait_event(req->completion_wq,
1373                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1374         zfcp_fsf_req_free(req);
1375
1376         return retval;
1377 }
1378
1379 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1380 {
1381         struct zfcp_port *port = req->data;
1382         struct fsf_qtcb_header *header = &req->qtcb->header;
1383         struct fsf_plogi *plogi;
1384
1385         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1386                 return;
1387
1388         switch (header->fsf_status) {
1389         case FSF_PORT_ALREADY_OPEN:
1390                 break;
1391         case FSF_ACCESS_DENIED:
1392                 zfcp_fsf_access_denied_port(req, port);
1393                 break;
1394         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1395                 dev_warn(&req->adapter->ccw_device->dev,
1396                          "Not enough FCP adapter resources to open "
1397                          "remote port 0x%016Lx\n",
1398                          (unsigned long long)port->wwpn);
1399                 zfcp_erp_port_failed(port, 31, req);
1400                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1401                 break;
1402         case FSF_ADAPTER_STATUS_AVAILABLE:
1403                 switch (header->fsf_status_qual.word[0]) {
1404                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1405                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1406                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1407                         break;
1408                 case FSF_SQ_NO_RETRY_POSSIBLE:
1409                         dev_warn(&req->adapter->ccw_device->dev,
1410                                  "Remote port 0x%016Lx could not be opened\n",
1411                                  (unsigned long long)port->wwpn);
1412                         zfcp_erp_port_failed(port, 32, req);
1413                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1414                         break;
1415                 }
1416                 break;
1417         case FSF_GOOD:
1418                 port->handle = header->port_handle;
1419                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1420                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1421                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1422                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1423                                   &port->status);
1424                 /* check whether D_ID has changed during open */
1425                 /*
1426                  * FIXME: This check is not airtight, as the FCP channel does
1427                  * not monitor closures of target port connections caused on
1428                  * the remote side. Thus, they might miss out on invalidating
1429                  * locally cached WWPNs (and other N_Port parameters) of gone
1430                  * target ports. So, our heroic attempt to make things safe
1431                  * could be undermined by 'open port' response data tagged with
1432                  * obsolete WWPNs. Another reason to monitor potential
1433                  * connection closures ourself at least (by interpreting
1434                  * incoming ELS' and unsolicited status). It just crosses my
1435                  * mind that one should be able to cross-check by means of
1436                  * another GID_PN straight after a port has been opened.
1437                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1438                  */
1439                 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1440                 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1441                         if (plogi->serv_param.wwpn != port->wwpn)
1442                                 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1443                                                   &port->status);
1444                         else {
1445                                 port->wwnn = plogi->serv_param.wwnn;
1446                                 zfcp_fc_plogi_evaluate(port, plogi);
1447                         }
1448                 }
1449                 break;
1450         case FSF_UNKNOWN_OP_SUBTYPE:
1451                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1452                 break;
1453         }
1454 }
1455
1456 /**
1457  * zfcp_fsf_open_port - create and send open port request
1458  * @erp_action: pointer to struct zfcp_erp_action
1459  * Returns: 0 on success, error otherwise
1460  */
1461 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1462 {
1463         struct qdio_buffer_element *sbale;
1464         struct zfcp_adapter *adapter = erp_action->adapter;
1465         struct zfcp_fsf_req *req;
1466         int retval = -EIO;
1467
1468         spin_lock_bh(&adapter->req_q_lock);
1469         if (zfcp_fsf_req_sbal_get(adapter))
1470                 goto out;
1471
1472         req = zfcp_fsf_req_create(adapter,
1473                                   FSF_QTCB_OPEN_PORT_WITH_DID,
1474                                   ZFCP_REQ_AUTO_CLEANUP,
1475                                   adapter->pool.fsf_req_erp);
1476         if (IS_ERR(req)) {
1477                 retval = PTR_ERR(req);
1478                 goto out;
1479         }
1480
1481         sbale = zfcp_qdio_sbale_req(req);
1482         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1483         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1484
1485         req->handler = zfcp_fsf_open_port_handler;
1486         req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1487         req->data = erp_action->port;
1488         req->erp_action = erp_action;
1489         erp_action->fsf_req = req;
1490
1491         zfcp_fsf_start_erp_timer(req);
1492         retval = zfcp_fsf_req_send(req);
1493         if (retval) {
1494                 zfcp_fsf_req_free(req);
1495                 erp_action->fsf_req = NULL;
1496         }
1497 out:
1498         spin_unlock_bh(&adapter->req_q_lock);
1499         return retval;
1500 }
1501
1502 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1503 {
1504         struct zfcp_port *port = req->data;
1505
1506         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1507                 return;
1508
1509         switch (req->qtcb->header.fsf_status) {
1510         case FSF_PORT_HANDLE_NOT_VALID:
1511                 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1512                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1513                 break;
1514         case FSF_ADAPTER_STATUS_AVAILABLE:
1515                 break;
1516         case FSF_GOOD:
1517                 zfcp_erp_modify_port_status(port, 33, req,
1518                                             ZFCP_STATUS_COMMON_OPEN,
1519                                             ZFCP_CLEAR);
1520                 break;
1521         }
1522 }
1523
1524 /**
1525  * zfcp_fsf_close_port - create and send close port request
1526  * @erp_action: pointer to struct zfcp_erp_action
1527  * Returns: 0 on success, error otherwise
1528  */
1529 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1530 {
1531         struct qdio_buffer_element *sbale;
1532         struct zfcp_adapter *adapter = erp_action->adapter;
1533         struct zfcp_fsf_req *req;
1534         int retval = -EIO;
1535
1536         spin_lock_bh(&adapter->req_q_lock);
1537         if (zfcp_fsf_req_sbal_get(adapter))
1538                 goto out;
1539
1540         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1541                                   ZFCP_REQ_AUTO_CLEANUP,
1542                                   adapter->pool.fsf_req_erp);
1543         if (IS_ERR(req)) {
1544                 retval = PTR_ERR(req);
1545                 goto out;
1546         }
1547
1548         sbale = zfcp_qdio_sbale_req(req);
1549         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1550         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1551
1552         req->handler = zfcp_fsf_close_port_handler;
1553         req->data = erp_action->port;
1554         req->erp_action = erp_action;
1555         req->qtcb->header.port_handle = erp_action->port->handle;
1556         erp_action->fsf_req = req;
1557
1558         zfcp_fsf_start_erp_timer(req);
1559         retval = zfcp_fsf_req_send(req);
1560         if (retval) {
1561                 zfcp_fsf_req_free(req);
1562                 erp_action->fsf_req = NULL;
1563         }
1564 out:
1565         spin_unlock_bh(&adapter->req_q_lock);
1566         return retval;
1567 }
1568
1569 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1570 {
1571         struct zfcp_wka_port *wka_port = req->data;
1572         struct fsf_qtcb_header *header = &req->qtcb->header;
1573
1574         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1575                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1576                 goto out;
1577         }
1578
1579         switch (header->fsf_status) {
1580         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1581                 dev_warn(&req->adapter->ccw_device->dev,
1582                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1583         case FSF_ADAPTER_STATUS_AVAILABLE:
1584                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1585         case FSF_ACCESS_DENIED:
1586                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1587                 break;
1588         case FSF_PORT_ALREADY_OPEN:
1589                 break;
1590         case FSF_GOOD:
1591                 wka_port->handle = header->port_handle;
1592                 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1593         }
1594 out:
1595         wake_up(&wka_port->completion_wq);
1596 }
1597
1598 /**
1599  * zfcp_fsf_open_wka_port - create and send open wka-port request
1600  * @wka_port: pointer to struct zfcp_wka_port
1601  * Returns: 0 on success, error otherwise
1602  */
1603 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1604 {
1605         struct qdio_buffer_element *sbale;
1606         struct zfcp_adapter *adapter = wka_port->adapter;
1607         struct zfcp_fsf_req *req;
1608         int retval = -EIO;
1609
1610         spin_lock_bh(&adapter->req_q_lock);
1611         if (zfcp_fsf_req_sbal_get(adapter))
1612                 goto out;
1613
1614         req = zfcp_fsf_req_create(adapter,
1615                                   FSF_QTCB_OPEN_PORT_WITH_DID,
1616                                   ZFCP_REQ_AUTO_CLEANUP,
1617                                   adapter->pool.fsf_req_erp);
1618         if (unlikely(IS_ERR(req))) {
1619                 retval = PTR_ERR(req);
1620                 goto out;
1621         }
1622
1623         sbale = zfcp_qdio_sbale_req(req);
1624         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1625         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1626
1627         req->handler = zfcp_fsf_open_wka_port_handler;
1628         req->qtcb->bottom.support.d_id = wka_port->d_id;
1629         req->data = wka_port;
1630
1631         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1632         retval = zfcp_fsf_req_send(req);
1633         if (retval)
1634                 zfcp_fsf_req_free(req);
1635 out:
1636         spin_unlock_bh(&adapter->req_q_lock);
1637         return retval;
1638 }
1639
1640 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1641 {
1642         struct zfcp_wka_port *wka_port = req->data;
1643
1644         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1645                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1646                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
1647         }
1648
1649         wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1650         wake_up(&wka_port->completion_wq);
1651 }
1652
1653 /**
1654  * zfcp_fsf_close_wka_port - create and send close wka port request
1655  * @erp_action: pointer to struct zfcp_erp_action
1656  * Returns: 0 on success, error otherwise
1657  */
1658 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1659 {
1660         struct qdio_buffer_element *sbale;
1661         struct zfcp_adapter *adapter = wka_port->adapter;
1662         struct zfcp_fsf_req *req;
1663         int retval = -EIO;
1664
1665         spin_lock_bh(&adapter->req_q_lock);
1666         if (zfcp_fsf_req_sbal_get(adapter))
1667                 goto out;
1668
1669         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1670                                   ZFCP_REQ_AUTO_CLEANUP,
1671                                   adapter->pool.fsf_req_erp);
1672         if (unlikely(IS_ERR(req))) {
1673                 retval = PTR_ERR(req);
1674                 goto out;
1675         }
1676
1677         sbale = zfcp_qdio_sbale_req(req);
1678         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1679         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1680
1681         req->handler = zfcp_fsf_close_wka_port_handler;
1682         req->data = wka_port;
1683         req->qtcb->header.port_handle = wka_port->handle;
1684
1685         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1686         retval = zfcp_fsf_req_send(req);
1687         if (retval)
1688                 zfcp_fsf_req_free(req);
1689 out:
1690         spin_unlock_bh(&adapter->req_q_lock);
1691         return retval;
1692 }
1693
1694 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1695 {
1696         struct zfcp_port *port = req->data;
1697         struct fsf_qtcb_header *header = &req->qtcb->header;
1698         struct zfcp_unit *unit;
1699
1700         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1701                 goto skip_fsfstatus;
1702
1703         switch (header->fsf_status) {
1704         case FSF_PORT_HANDLE_NOT_VALID:
1705                 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1706                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1707                 break;
1708         case FSF_ACCESS_DENIED:
1709                 zfcp_fsf_access_denied_port(req, port);
1710                 break;
1711         case FSF_PORT_BOXED:
1712                 zfcp_erp_port_boxed(port, 50, req);
1713                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1714                                ZFCP_STATUS_FSFREQ_RETRY;
1715                 /* can't use generic zfcp_erp_modify_port_status because
1716                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1717                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1718                 list_for_each_entry(unit, &port->unit_list_head, list)
1719                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1720                                           &unit->status);
1721                 break;
1722         case FSF_ADAPTER_STATUS_AVAILABLE:
1723                 switch (header->fsf_status_qual.word[0]) {
1724                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1725                         /* fall through */
1726                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1727                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1728                         break;
1729                 }
1730                 break;
1731         case FSF_GOOD:
1732                 /* can't use generic zfcp_erp_modify_port_status because
1733                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1734                  */
1735                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1736                 list_for_each_entry(unit, &port->unit_list_head, list)
1737                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1738                                           &unit->status);
1739                 break;
1740         }
1741 skip_fsfstatus:
1742         atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1743 }
1744
1745 /**
1746  * zfcp_fsf_close_physical_port - close physical port
1747  * @erp_action: pointer to struct zfcp_erp_action
1748  * Returns: 0 on success
1749  */
1750 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1751 {
1752         struct qdio_buffer_element *sbale;
1753         struct zfcp_adapter *adapter = erp_action->adapter;
1754         struct zfcp_fsf_req *req;
1755         int retval = -EIO;
1756
1757         spin_lock_bh(&adapter->req_q_lock);
1758         if (zfcp_fsf_req_sbal_get(adapter))
1759                 goto out;
1760
1761         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1762                                   ZFCP_REQ_AUTO_CLEANUP,
1763                                   adapter->pool.fsf_req_erp);
1764         if (IS_ERR(req)) {
1765                 retval = PTR_ERR(req);
1766                 goto out;
1767         }
1768
1769         sbale = zfcp_qdio_sbale_req(req);
1770         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1771         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1772
1773         req->data = erp_action->port;
1774         req->qtcb->header.port_handle = erp_action->port->handle;
1775         req->erp_action = erp_action;
1776         req->handler = zfcp_fsf_close_physical_port_handler;
1777         erp_action->fsf_req = req;
1778         atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1779                         &erp_action->port->status);
1780
1781         zfcp_fsf_start_erp_timer(req);
1782         retval = zfcp_fsf_req_send(req);
1783         if (retval) {
1784                 zfcp_fsf_req_free(req);
1785                 erp_action->fsf_req = NULL;
1786         }
1787 out:
1788         spin_unlock_bh(&adapter->req_q_lock);
1789         return retval;
1790 }
1791
1792 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1793 {
1794         struct zfcp_adapter *adapter = req->adapter;
1795         struct zfcp_unit *unit = req->data;
1796         struct fsf_qtcb_header *header = &req->qtcb->header;
1797         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1798         struct fsf_queue_designator *queue_designator =
1799                                 &header->fsf_status_qual.fsf_queue_designator;
1800         int exclusive, readwrite;
1801
1802         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1803                 return;
1804
1805         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1806                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1807                           ZFCP_STATUS_UNIT_SHARED |
1808                           ZFCP_STATUS_UNIT_READONLY,
1809                           &unit->status);
1810
1811         switch (header->fsf_status) {
1812
1813         case FSF_PORT_HANDLE_NOT_VALID:
1814                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1815                 /* fall through */
1816         case FSF_LUN_ALREADY_OPEN:
1817                 break;
1818         case FSF_ACCESS_DENIED:
1819                 zfcp_fsf_access_denied_unit(req, unit);
1820                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1821                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1822                 break;
1823         case FSF_PORT_BOXED:
1824                 zfcp_erp_port_boxed(unit->port, 51, req);
1825                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1826                                ZFCP_STATUS_FSFREQ_RETRY;
1827                 break;
1828         case FSF_LUN_SHARING_VIOLATION:
1829                 if (header->fsf_status_qual.word[0])
1830                         dev_warn(&adapter->ccw_device->dev,
1831                                  "LUN 0x%Lx on port 0x%Lx is already in "
1832                                  "use by CSS%d, MIF Image ID %x\n",
1833                                  (unsigned long long)unit->fcp_lun,
1834                                  (unsigned long long)unit->port->wwpn,
1835                                  queue_designator->cssid,
1836                                  queue_designator->hla);
1837                 else
1838                         zfcp_act_eval_err(adapter,
1839                                           header->fsf_status_qual.word[2]);
1840                 zfcp_erp_unit_access_denied(unit, 60, req);
1841                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1842                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1843                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1844                 break;
1845         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1846                 dev_warn(&adapter->ccw_device->dev,
1847                          "No handle is available for LUN "
1848                          "0x%016Lx on port 0x%016Lx\n",
1849                          (unsigned long long)unit->fcp_lun,
1850                          (unsigned long long)unit->port->wwpn);
1851                 zfcp_erp_unit_failed(unit, 34, req);
1852                 /* fall through */
1853         case FSF_INVALID_COMMAND_OPTION:
1854                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1855                 break;
1856         case FSF_ADAPTER_STATUS_AVAILABLE:
1857                 switch (header->fsf_status_qual.word[0]) {
1858                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1859                         zfcp_test_link(unit->port);
1860                         /* fall through */
1861                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1862                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1863                         break;
1864                 }
1865                 break;
1866
1867         case FSF_GOOD:
1868                 unit->handle = header->lun_handle;
1869                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1870
1871                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1872                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1873                     (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1874                         exclusive = (bottom->lun_access_info &
1875                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1876                         readwrite = (bottom->lun_access_info &
1877                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1878
1879                         if (!exclusive)
1880                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1881                                                 &unit->status);
1882
1883                         if (!readwrite) {
1884                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1885                                                 &unit->status);
1886                                 dev_info(&adapter->ccw_device->dev,
1887                                          "SCSI device at LUN 0x%016Lx on port "
1888                                          "0x%016Lx opened read-only\n",
1889                                          (unsigned long long)unit->fcp_lun,
1890                                          (unsigned long long)unit->port->wwpn);
1891                         }
1892
1893                         if (exclusive && !readwrite) {
1894                                 dev_err(&adapter->ccw_device->dev,
1895                                         "Exclusive read-only access not "
1896                                         "supported (unit 0x%016Lx, "
1897                                         "port 0x%016Lx)\n",
1898                                         (unsigned long long)unit->fcp_lun,
1899                                         (unsigned long long)unit->port->wwpn);
1900                                 zfcp_erp_unit_failed(unit, 35, req);
1901                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1902                                 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1903                         } else if (!exclusive && readwrite) {
1904                                 dev_err(&adapter->ccw_device->dev,
1905                                         "Shared read-write access not "
1906                                         "supported (unit 0x%016Lx, port "
1907                                         "0x%016Lx\n)",
1908                                         (unsigned long long)unit->fcp_lun,
1909                                         (unsigned long long)unit->port->wwpn);
1910                                 zfcp_erp_unit_failed(unit, 36, req);
1911                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1912                                 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1913                         }
1914                 }
1915                 break;
1916         }
1917 }
1918
1919 /**
1920  * zfcp_fsf_open_unit - open unit
1921  * @erp_action: pointer to struct zfcp_erp_action
1922  * Returns: 0 on success, error otherwise
1923  */
1924 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1925 {
1926         struct qdio_buffer_element *sbale;
1927         struct zfcp_adapter *adapter = erp_action->adapter;
1928         struct zfcp_fsf_req *req;
1929         int retval = -EIO;
1930
1931         spin_lock_bh(&adapter->req_q_lock);
1932         if (zfcp_fsf_req_sbal_get(adapter))
1933                 goto out;
1934
1935         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1936                                   ZFCP_REQ_AUTO_CLEANUP,
1937                                   adapter->pool.fsf_req_erp);
1938         if (IS_ERR(req)) {
1939                 retval = PTR_ERR(req);
1940                 goto out;
1941         }
1942
1943         sbale = zfcp_qdio_sbale_req(req);
1944         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1945         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1946
1947         req->qtcb->header.port_handle = erp_action->port->handle;
1948         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1949         req->handler = zfcp_fsf_open_unit_handler;
1950         req->data = erp_action->unit;
1951         req->erp_action = erp_action;
1952         erp_action->fsf_req = req;
1953
1954         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1955                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1956
1957         zfcp_fsf_start_erp_timer(req);
1958         retval = zfcp_fsf_req_send(req);
1959         if (retval) {
1960                 zfcp_fsf_req_free(req);
1961                 erp_action->fsf_req = NULL;
1962         }
1963 out:
1964         spin_unlock_bh(&adapter->req_q_lock);
1965         return retval;
1966 }
1967
1968 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1969 {
1970         struct zfcp_unit *unit = req->data;
1971
1972         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1973                 return;
1974
1975         switch (req->qtcb->header.fsf_status) {
1976         case FSF_PORT_HANDLE_NOT_VALID:
1977                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1978                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1979                 break;
1980         case FSF_LUN_HANDLE_NOT_VALID:
1981                 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1982                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1983                 break;
1984         case FSF_PORT_BOXED:
1985                 zfcp_erp_port_boxed(unit->port, 52, req);
1986                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1987                                ZFCP_STATUS_FSFREQ_RETRY;
1988                 break;
1989         case FSF_ADAPTER_STATUS_AVAILABLE:
1990                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1991                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1992                         zfcp_test_link(unit->port);
1993                         /* fall through */
1994                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1995                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1996                         break;
1997                 }
1998                 break;
1999         case FSF_GOOD:
2000                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2001                 break;
2002         }
2003 }
2004
2005 /**
2006  * zfcp_fsf_close_unit - close zfcp unit
2007  * @erp_action: pointer to struct zfcp_unit
2008  * Returns: 0 on success, error otherwise
2009  */
2010 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2011 {
2012         struct qdio_buffer_element *sbale;
2013         struct zfcp_adapter *adapter = erp_action->adapter;
2014         struct zfcp_fsf_req *req;
2015         int retval = -EIO;
2016
2017         spin_lock_bh(&adapter->req_q_lock);
2018         if (zfcp_fsf_req_sbal_get(adapter))
2019                 goto out;
2020         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2021                                   ZFCP_REQ_AUTO_CLEANUP,
2022                                   adapter->pool.fsf_req_erp);
2023         if (IS_ERR(req)) {
2024                 retval = PTR_ERR(req);
2025                 goto out;
2026         }
2027
2028         sbale = zfcp_qdio_sbale_req(req);
2029         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2030         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2031
2032         req->qtcb->header.port_handle = erp_action->port->handle;
2033         req->qtcb->header.lun_handle = erp_action->unit->handle;
2034         req->handler = zfcp_fsf_close_unit_handler;
2035         req->data = erp_action->unit;
2036         req->erp_action = erp_action;
2037         erp_action->fsf_req = req;
2038
2039         zfcp_fsf_start_erp_timer(req);
2040         retval = zfcp_fsf_req_send(req);
2041         if (retval) {
2042                 zfcp_fsf_req_free(req);
2043                 erp_action->fsf_req = NULL;
2044         }
2045 out:
2046         spin_unlock_bh(&adapter->req_q_lock);
2047         return retval;
2048 }
2049
2050 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2051 {
2052         lat_rec->sum += lat;
2053         lat_rec->min = min(lat_rec->min, lat);
2054         lat_rec->max = max(lat_rec->max, lat);
2055 }
2056
2057 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2058 {
2059         struct fsf_qual_latency_info *lat_inf;
2060         struct latency_cont *lat;
2061         struct zfcp_unit *unit = req->unit;
2062         unsigned long flags;
2063
2064         lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2065
2066         switch (req->qtcb->bottom.io.data_direction) {
2067         case FSF_DATADIR_READ:
2068                 lat = &unit->latencies.read;
2069                 break;
2070         case FSF_DATADIR_WRITE:
2071                 lat = &unit->latencies.write;
2072                 break;
2073         case FSF_DATADIR_CMND:
2074                 lat = &unit->latencies.cmd;
2075                 break;
2076         default:
2077                 return;
2078         }
2079
2080         spin_lock_irqsave(&unit->latencies.lock, flags);
2081         zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2082         zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2083         lat->counter++;
2084         spin_unlock_irqrestore(&unit->latencies.lock, flags);
2085 }
2086
2087 #ifdef CONFIG_BLK_DEV_IO_TRACE
2088 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2089 {
2090         struct fsf_qual_latency_info *lat_inf;
2091         struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2092         struct request *req = scsi_cmnd->request;
2093         struct zfcp_blk_drv_data trace;
2094         int ticks = fsf_req->adapter->timer_ticks;
2095
2096         trace.flags = 0;
2097         trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2098         if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2099                 trace.flags |= ZFCP_BLK_LAT_VALID;
2100                 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2101                 trace.channel_lat = lat_inf->channel_lat * ticks;
2102                 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2103         }
2104         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2105                 trace.flags |= ZFCP_BLK_REQ_ERROR;
2106         trace.inb_usage = fsf_req->qdio_inb_usage;
2107         trace.outb_usage = fsf_req->qdio_outb_usage;
2108
2109         blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2110 }
2111 #else
2112 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2113 {
2114 }
2115 #endif
2116
2117 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2118 {
2119         struct scsi_cmnd *scpnt;
2120         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2121             &(req->qtcb->bottom.io.fcp_rsp);
2122         u32 sns_len;
2123         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2124         unsigned long flags;
2125
2126         read_lock_irqsave(&req->adapter->abort_lock, flags);
2127
2128         scpnt = req->data;
2129         if (unlikely(!scpnt)) {
2130                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2131                 return;
2132         }
2133
2134         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2135                 set_host_byte(scpnt, DID_SOFT_ERROR);
2136                 set_driver_byte(scpnt, SUGGEST_RETRY);
2137                 goto skip_fsfstatus;
2138         }
2139
2140         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2141                 set_host_byte(scpnt, DID_ERROR);
2142                 goto skip_fsfstatus;
2143         }
2144
2145         set_msg_byte(scpnt, COMMAND_COMPLETE);
2146
2147         scpnt->result |= fcp_rsp_iu->scsi_status;
2148
2149         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2150                 zfcp_fsf_req_latency(req);
2151
2152         zfcp_fsf_trace_latency(req);
2153
2154         if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2155                 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2156                         set_host_byte(scpnt, DID_OK);
2157                 else {
2158                         set_host_byte(scpnt, DID_ERROR);
2159                         goto skip_fsfstatus;
2160                 }
2161         }
2162
2163         if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2164                 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2165                           fcp_rsp_iu->fcp_rsp_len;
2166                 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2167                 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2168
2169                 memcpy(scpnt->sense_buffer,
2170                        zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2171         }
2172
2173         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2174                 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2175                 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2176                     scpnt->underflow)
2177                         set_host_byte(scpnt, DID_ERROR);
2178         }
2179 skip_fsfstatus:
2180         if (scpnt->result != 0)
2181                 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2182         else if (scpnt->retries > 0)
2183                 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2184         else
2185                 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2186
2187         scpnt->host_scribble = NULL;
2188         (scpnt->scsi_done) (scpnt);
2189         /*
2190          * We must hold this lock until scsi_done has been called.
2191          * Otherwise we may call scsi_done after abort regarding this
2192          * command has completed.
2193          * Note: scsi_done must not block!
2194          */
2195         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2196 }
2197
2198 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2199 {
2200         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2201             &(req->qtcb->bottom.io.fcp_rsp);
2202         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2203
2204         if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2205              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2206                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2207 }
2208
2209
2210 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2211 {
2212         struct zfcp_unit *unit;
2213         struct fsf_qtcb_header *header = &req->qtcb->header;
2214
2215         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2216                 unit = req->data;
2217         else
2218                 unit = req->unit;
2219
2220         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2221                 goto skip_fsfstatus;
2222
2223         switch (header->fsf_status) {
2224         case FSF_HANDLE_MISMATCH:
2225         case FSF_PORT_HANDLE_NOT_VALID:
2226                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2227                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2228                 break;
2229         case FSF_FCPLUN_NOT_VALID:
2230         case FSF_LUN_HANDLE_NOT_VALID:
2231                 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2232                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2233                 break;
2234         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2235                 zfcp_fsf_class_not_supp(req);
2236                 break;
2237         case FSF_ACCESS_DENIED:
2238                 zfcp_fsf_access_denied_unit(req, unit);
2239                 break;
2240         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2241                 dev_err(&req->adapter->ccw_device->dev,
2242                         "Incorrect direction %d, unit 0x%016Lx on port "
2243                         "0x%016Lx closed\n",
2244                         req->qtcb->bottom.io.data_direction,
2245                         (unsigned long long)unit->fcp_lun,
2246                         (unsigned long long)unit->port->wwpn);
2247                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2248                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2249                 break;
2250         case FSF_CMND_LENGTH_NOT_VALID:
2251                 dev_err(&req->adapter->ccw_device->dev,
2252                         "Incorrect CDB length %d, unit 0x%016Lx on "
2253                         "port 0x%016Lx closed\n",
2254                         req->qtcb->bottom.io.fcp_cmnd_length,
2255                         (unsigned long long)unit->fcp_lun,
2256                         (unsigned long long)unit->port->wwpn);
2257                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2258                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2259                 break;
2260         case FSF_PORT_BOXED:
2261                 zfcp_erp_port_boxed(unit->port, 53, req);
2262                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2263                                ZFCP_STATUS_FSFREQ_RETRY;
2264                 break;
2265         case FSF_LUN_BOXED:
2266                 zfcp_erp_unit_boxed(unit, 54, req);
2267                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2268                                ZFCP_STATUS_FSFREQ_RETRY;
2269                 break;
2270         case FSF_ADAPTER_STATUS_AVAILABLE:
2271                 if (header->fsf_status_qual.word[0] ==
2272                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2273                         zfcp_test_link(unit->port);
2274                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2275                 break;
2276         }
2277 skip_fsfstatus:
2278         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2279                 zfcp_fsf_send_fcp_ctm_handler(req);
2280         else {
2281                 zfcp_fsf_send_fcp_command_task_handler(req);
2282                 req->unit = NULL;
2283                 zfcp_unit_put(unit);
2284         }
2285 }
2286
2287 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2288 {
2289         u32 *fcp_dl_ptr;
2290
2291         /*
2292          * fcp_dl_addr = start address of fcp_cmnd structure +
2293          * size of fixed part + size of dynamically sized add_dcp_cdb field
2294          * SEE FCP-2 documentation
2295          */
2296         fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2297                         (fcp_cmd->add_fcp_cdb_length << 2));
2298         *fcp_dl_ptr = fcp_dl;
2299 }
2300
2301 /**
2302  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2303  * @adapter: adapter where scsi command is issued
2304  * @unit: unit where command is sent to
2305  * @scsi_cmnd: scsi command to be sent
2306  * @timer: timer to be started when request is initiated
2307  * @req_flags: flags for fsf_request
2308  */
2309 int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2310                                    struct zfcp_unit *unit,
2311                                    struct scsi_cmnd *scsi_cmnd,
2312                                    int use_timer, int req_flags)
2313 {
2314         struct zfcp_fsf_req *req;
2315         struct fcp_cmnd_iu *fcp_cmnd_iu;
2316         unsigned int sbtype;
2317         int real_bytes, retval = -EIO;
2318
2319         if (unlikely(!(atomic_read(&unit->status) &
2320                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2321                 return -EBUSY;
2322
2323         spin_lock(&adapter->req_q_lock);
2324         if (!zfcp_fsf_sbal_available(adapter))
2325                 goto out;
2326         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2327                                   adapter->pool.fsf_req_scsi);
2328         if (IS_ERR(req)) {
2329                 retval = PTR_ERR(req);
2330                 goto out;
2331         }
2332
2333         zfcp_unit_get(unit);
2334         req->unit = unit;
2335         req->data = scsi_cmnd;
2336         req->handler = zfcp_fsf_send_fcp_command_handler;
2337         req->qtcb->header.lun_handle = unit->handle;
2338         req->qtcb->header.port_handle = unit->port->handle;
2339         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2340
2341         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2342
2343         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2344         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2345         /*
2346          * set depending on data direction:
2347          *      data direction bits in SBALE (SB Type)
2348          *      data direction bits in QTCB
2349          *      data direction bits in FCP_CMND IU
2350          */
2351         switch (scsi_cmnd->sc_data_direction) {
2352         case DMA_NONE:
2353                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2354                 sbtype = SBAL_FLAGS0_TYPE_READ;
2355                 break;
2356         case DMA_FROM_DEVICE:
2357                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2358                 sbtype = SBAL_FLAGS0_TYPE_READ;
2359                 fcp_cmnd_iu->rddata = 1;
2360                 break;
2361         case DMA_TO_DEVICE:
2362                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2363                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2364                 fcp_cmnd_iu->wddata = 1;
2365                 break;
2366         case DMA_BIDIRECTIONAL:
2367         default:
2368                 retval = -EIO;
2369                 goto failed_scsi_cmnd;
2370         }
2371
2372         if (likely((scsi_cmnd->device->simple_tags) ||
2373                    ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2374                     (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2375                 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2376         else
2377                 fcp_cmnd_iu->task_attribute = UNTAGGED;
2378
2379         if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2380                 fcp_cmnd_iu->add_fcp_cdb_length =
2381                         (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2382
2383         memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2384
2385         req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2386                 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2387
2388         real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2389                                              scsi_sglist(scsi_cmnd),
2390                                              FSF_MAX_SBALS_PER_REQ);
2391         if (unlikely(real_bytes < 0)) {
2392                 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2393                         retval = -EIO;
2394                 else {
2395                         dev_err(&adapter->ccw_device->dev,
2396                                 "Oversize data package, unit 0x%016Lx "
2397                                 "on port 0x%016Lx closed\n",
2398                                 (unsigned long long)unit->fcp_lun,
2399                                 (unsigned long long)unit->port->wwpn);
2400                         zfcp_erp_unit_shutdown(unit, 0, 131, req);
2401                         retval = -EINVAL;
2402                 }
2403                 goto failed_scsi_cmnd;
2404         }
2405
2406         zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2407
2408         if (use_timer)
2409                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2410
2411         retval = zfcp_fsf_req_send(req);
2412         if (unlikely(retval))
2413                 goto failed_scsi_cmnd;
2414
2415         goto out;
2416
2417 failed_scsi_cmnd:
2418         zfcp_unit_put(unit);
2419         zfcp_fsf_req_free(req);
2420         scsi_cmnd->host_scribble = NULL;
2421 out:
2422         spin_unlock(&adapter->req_q_lock);
2423         return retval;
2424 }
2425
2426 /**
2427  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2428  * @adapter: pointer to struct zfcp-adapter
2429  * @unit: pointer to struct zfcp_unit
2430  * @tm_flags: unsigned byte for task management flags
2431  * @req_flags: int request flags
2432  * Returns: on success pointer to struct fsf_req, NULL otherwise
2433  */
2434 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2435                                            struct zfcp_unit *unit,
2436                                            u8 tm_flags, int req_flags)
2437 {
2438         struct qdio_buffer_element *sbale;
2439         struct zfcp_fsf_req *req = NULL;
2440         struct fcp_cmnd_iu *fcp_cmnd_iu;
2441
2442         if (unlikely(!(atomic_read(&unit->status) &
2443                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2444                 return NULL;
2445
2446         spin_lock(&adapter->req_q_lock);
2447         if (!zfcp_fsf_sbal_available(adapter))
2448                 goto out;
2449         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2450                                   adapter->pool.fsf_req_scsi);
2451         if (IS_ERR(req)) {
2452                 req = NULL;
2453                 goto out;
2454         }
2455
2456         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2457         req->data = unit;
2458         req->handler = zfcp_fsf_send_fcp_command_handler;
2459         req->qtcb->header.lun_handle = unit->handle;
2460         req->qtcb->header.port_handle = unit->port->handle;
2461         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2462         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2463         req->qtcb->bottom.io.fcp_cmnd_length =  sizeof(struct fcp_cmnd_iu) +
2464                                                 sizeof(u32);
2465
2466         sbale = zfcp_qdio_sbale_req(req);
2467         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2468         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2469
2470         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2471         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2472         fcp_cmnd_iu->task_management_flags = tm_flags;
2473
2474         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2475         if (!zfcp_fsf_req_send(req))
2476                 goto out;
2477
2478         zfcp_fsf_req_free(req);
2479         req = NULL;
2480 out:
2481         spin_unlock(&adapter->req_q_lock);
2482         return req;
2483 }
2484
2485 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2486 {
2487         if (req->qtcb->header.fsf_status != FSF_GOOD)
2488                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2489 }
2490
2491 /**
2492  * zfcp_fsf_control_file - control file upload/download
2493  * @adapter: pointer to struct zfcp_adapter
2494  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2495  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2496  */
2497 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2498                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2499 {
2500         struct qdio_buffer_element *sbale;
2501         struct zfcp_fsf_req *req = NULL;
2502         struct fsf_qtcb_bottom_support *bottom;
2503         int direction, retval = -EIO, bytes;
2504
2505         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2506                 return ERR_PTR(-EOPNOTSUPP);
2507
2508         switch (fsf_cfdc->command) {
2509         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2510                 direction = SBAL_FLAGS0_TYPE_WRITE;
2511                 break;
2512         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2513                 direction = SBAL_FLAGS0_TYPE_READ;
2514                 break;
2515         default:
2516                 return ERR_PTR(-EINVAL);
2517         }
2518
2519         spin_lock_bh(&adapter->req_q_lock);
2520         if (zfcp_fsf_req_sbal_get(adapter))
2521                 goto out;
2522
2523         req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
2524         if (IS_ERR(req)) {
2525                 retval = -EPERM;
2526                 goto out;
2527         }
2528
2529         req->handler = zfcp_fsf_control_file_handler;
2530
2531         sbale = zfcp_qdio_sbale_req(req);
2532         sbale[0].flags |= direction;
2533
2534         bottom = &req->qtcb->bottom.support;
2535         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2536         bottom->option = fsf_cfdc->option;
2537
2538         bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2539                                         FSF_MAX_SBALS_PER_REQ);
2540         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2541                 retval = -ENOMEM;
2542                 zfcp_fsf_req_free(req);
2543                 goto out;
2544         }
2545
2546         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2547         retval = zfcp_fsf_req_send(req);
2548 out:
2549         spin_unlock_bh(&adapter->req_q_lock);
2550
2551         if (!retval) {
2552                 wait_event(req->completion_wq,
2553                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2554                 return req;
2555         }
2556         return ERR_PTR(retval);
2557 }