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

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