git.oblomov.eu Git - linux-2.6/blob - drivers/s390/scsi/zfcp_fsf.c

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