drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2010
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <linux/slab.h>
  14 #include <scsi/fc/fc_els.h>
  15 #include "zfcp_ext.h"
  16 #include "zfcp_fc.h"
  17 #include "zfcp_dbf.h"
  18 #include "zfcp_qdio.h"
  19 #include "zfcp_reqlist.h"
  20
  21 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  22 {
  23         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  24         zfcp_qdio_siosl(adapter);
  25         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  26                                 "fsrth_1", NULL);
  27 }
  28
  29 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  30                                  unsigned long timeout)
  31 {
  32         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  33         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  34         fsf_req->timer.expires = jiffies + timeout;
  35         add_timer(&fsf_req->timer);
  36 }
  37
  38 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  39 {
  40         BUG_ON(!fsf_req->erp_action);
  41         fsf_req->timer.function = zfcp_erp_timeout_handler;
  42         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  43         fsf_req->timer.expires = jiffies + 30 * HZ;
  44         add_timer(&fsf_req->timer);
  45 }
  46
  47 /* association between FSF command and FSF QTCB type */
  48 static u32 fsf_qtcb_type[] = {
  49         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  50         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  51         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  52         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  56         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  59         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  60         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  61         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  62 };
  63
  64 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  65 {
  66         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  67                 "operational because of an unsupported FC class\n");
  68         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
  69         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  70 }
  71
  72 /**
  73  * zfcp_fsf_req_free - free memory used by fsf request
  74  * @fsf_req: pointer to struct zfcp_fsf_req
  75  */
  76 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  77 {
  78         if (likely(req->pool)) {
  79                 if (likely(req->qtcb))
  80                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  81                 mempool_free(req, req->pool);
  82                 return;
  83         }
  84
  85         if (likely(req->qtcb))
  86                 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
  87         kfree(req);
  88 }
  89
  90 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  91 {
  92         unsigned long flags;
  93         struct fsf_status_read_buffer *sr_buf = req->data;
  94         struct zfcp_adapter *adapter = req->adapter;
  95         struct zfcp_port *port;
  96         int d_id = ntoh24(sr_buf->d_id);
  97
  98         read_lock_irqsave(&adapter->port_list_lock, flags);
  99         list_for_each_entry(port, &adapter->port_list, list)
 100                 if (port->d_id == d_id) {
 101                         zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
 102                         break;
 103                 }
 104         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 105 }
 106
 107 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 108                                          struct fsf_link_down_info *link_down)
 109 {
 110         struct zfcp_adapter *adapter = req->adapter;
 111
 112         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 113                 return;
 114
 115         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 116
 117         zfcp_scsi_schedule_rports_block(adapter);
 118
 119         if (!link_down)
 120                 goto out;
 121
 122         switch (link_down->error_code) {
 123         case FSF_PSQ_LINK_NO_LIGHT:
 124                 dev_warn(&req->adapter->ccw_device->dev,
 125                          "There is no light signal from the local "
 126                          "fibre channel cable\n");
 127                 break;
 128         case FSF_PSQ_LINK_WRAP_PLUG:
 129                 dev_warn(&req->adapter->ccw_device->dev,
 130                          "There is a wrap plug instead of a fibre "
 131                          "channel cable\n");
 132                 break;
 133         case FSF_PSQ_LINK_NO_FCP:
 134                 dev_warn(&req->adapter->ccw_device->dev,
 135                          "The adjacent fibre channel node does not "
 136                          "support FCP\n");
 137                 break;
 138         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 139                 dev_warn(&req->adapter->ccw_device->dev,
 140                          "The FCP device is suspended because of a "
 141                          "firmware update\n");
 142                 break;
 143         case FSF_PSQ_LINK_INVALID_WWPN:
 144                 dev_warn(&req->adapter->ccw_device->dev,
 145                          "The FCP device detected a WWPN that is "
 146                          "duplicate or not valid\n");
 147                 break;
 148         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 149                 dev_warn(&req->adapter->ccw_device->dev,
 150                          "The fibre channel fabric does not support NPIV\n");
 151                 break;
 152         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 153                 dev_warn(&req->adapter->ccw_device->dev,
 154                          "The FCP adapter cannot support more NPIV ports\n");
 155                 break;
 156         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 157                 dev_warn(&req->adapter->ccw_device->dev,
 158                          "The adjacent switch cannot support "
 159                          "more NPIV ports\n");
 160                 break;
 161         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 162                 dev_warn(&req->adapter->ccw_device->dev,
 163                          "The FCP adapter could not log in to the "
 164                          "fibre channel fabric\n");
 165                 break;
 166         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 167                 dev_warn(&req->adapter->ccw_device->dev,
 168                          "The WWPN assignment file on the FCP adapter "
 169                          "has been damaged\n");
 170                 break;
 171         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 172                 dev_warn(&req->adapter->ccw_device->dev,
 173                          "The mode table on the FCP adapter "
 174                          "has been damaged\n");
 175                 break;
 176         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 177                 dev_warn(&req->adapter->ccw_device->dev,
 178                          "All NPIV ports on the FCP adapter have "
 179                          "been assigned\n");
 180                 break;
 181         default:
 182                 dev_warn(&req->adapter->ccw_device->dev,
 183                          "The link between the FCP adapter and "
 184                          "the FC fabric is down\n");
 185         }
 186 out:
 187         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 188 }
 189
 190 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 191 {
 192         struct fsf_status_read_buffer *sr_buf = req->data;
 193         struct fsf_link_down_info *ldi =
 194                 (struct fsf_link_down_info *) &sr_buf->payload;
 195
 196         switch (sr_buf->status_subtype) {
 197         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 198                 zfcp_fsf_link_down_info_eval(req, ldi);
 199                 break;
 200         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 201                 zfcp_fsf_link_down_info_eval(req, ldi);
 202                 break;
 203         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 204                 zfcp_fsf_link_down_info_eval(req, NULL);
 205         };
 206 }
 207
 208 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 209 {
 210         struct zfcp_adapter *adapter = req->adapter;
 211         struct fsf_status_read_buffer *sr_buf = req->data;
 212
 213         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 214                 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
 215                 mempool_free(sr_buf, adapter->pool.status_read_data);
 216                 zfcp_fsf_req_free(req);
 217                 return;
 218         }
 219
 220         zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
 221
 222         switch (sr_buf->status_type) {
 223         case FSF_STATUS_READ_PORT_CLOSED:
 224                 zfcp_fsf_status_read_port_closed(req);
 225                 break;
 226         case FSF_STATUS_READ_INCOMING_ELS:
 227                 zfcp_fc_incoming_els(req);
 228                 break;
 229         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 230                 break;
 231         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 232                 dev_warn(&adapter->ccw_device->dev,
 233                          "The error threshold for checksum statistics "
 234                          "has been exceeded\n");
 235                 zfcp_dbf_hba_berr(adapter->dbf, req);
 236                 break;
 237         case FSF_STATUS_READ_LINK_DOWN:
 238                 zfcp_fsf_status_read_link_down(req);
 239                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 240                 break;
 241         case FSF_STATUS_READ_LINK_UP:
 242                 dev_info(&adapter->ccw_device->dev,
 243                          "The local link has been restored\n");
 244                 /* All ports should be marked as ready to run again */
 245                 zfcp_erp_set_adapter_status(adapter,
 246                                             ZFCP_STATUS_COMMON_RUNNING);
 247                 zfcp_erp_adapter_reopen(adapter,
 248                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 249                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 250                                         "fssrh_2", req);
 251                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 252
 253                 break;
 254         case FSF_STATUS_READ_NOTIFICATION_LOST:
 255                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 256                         zfcp_cfdc_adapter_access_changed(adapter);
 257                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 258                         queue_work(adapter->work_queue, &adapter->scan_work);
 259                 break;
 260         case FSF_STATUS_READ_CFDC_UPDATED:
 261                 zfcp_cfdc_adapter_access_changed(adapter);
 262                 break;
 263         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 264                 adapter->adapter_features = sr_buf->payload.word[0];
 265                 break;
 266         }
 267
 268         mempool_free(sr_buf, adapter->pool.status_read_data);
 269         zfcp_fsf_req_free(req);
 270
 271         atomic_inc(&adapter->stat_miss);
 272         queue_work(adapter->work_queue, &adapter->stat_work);
 273 }
 274
 275 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 276 {
 277         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 278         case FSF_SQ_FCP_RSP_AVAILABLE:
 279         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 280         case FSF_SQ_NO_RETRY_POSSIBLE:
 281         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 282                 return;
 283         case FSF_SQ_COMMAND_ABORTED:
 284                 break;
 285         case FSF_SQ_NO_RECOM:
 286                 dev_err(&req->adapter->ccw_device->dev,
 287                         "The FCP adapter reported a problem "
 288                         "that cannot be recovered\n");
 289                 zfcp_qdio_siosl(req->adapter);
 290                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
 291                 break;
 292         }
 293         /* all non-return stats set FSFREQ_ERROR*/
 294         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 295 }
 296
 297 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 298 {
 299         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 300                 return;
 301
 302         switch (req->qtcb->header.fsf_status) {
 303         case FSF_UNKNOWN_COMMAND:
 304                 dev_err(&req->adapter->ccw_device->dev,
 305                         "The FCP adapter does not recognize the command 0x%x\n",
 306                         req->qtcb->header.fsf_command);
 307                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
 308                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 309                 break;
 310         case FSF_ADAPTER_STATUS_AVAILABLE:
 311                 zfcp_fsf_fsfstatus_qual_eval(req);
 312                 break;
 313         }
 314 }
 315
 316 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 317 {
 318         struct zfcp_adapter *adapter = req->adapter;
 319         struct fsf_qtcb *qtcb = req->qtcb;
 320         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 321
 322         zfcp_dbf_hba_fsf_response(req);
 323
 324         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 325                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 326                 return;
 327         }
 328
 329         switch (qtcb->prefix.prot_status) {
 330         case FSF_PROT_GOOD:
 331         case FSF_PROT_FSF_STATUS_PRESENTED:
 332                 return;
 333         case FSF_PROT_QTCB_VERSION_ERROR:
 334                 dev_err(&adapter->ccw_device->dev,
 335                         "QTCB version 0x%x not supported by FCP adapter "
 336                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 337                         psq->word[0], psq->word[1]);
 338                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
 339                 break;
 340         case FSF_PROT_ERROR_STATE:
 341         case FSF_PROT_SEQ_NUMB_ERROR:
 342                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
 343                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 344                 break;
 345         case FSF_PROT_UNSUPP_QTCB_TYPE:
 346                 dev_err(&adapter->ccw_device->dev,
 347                         "The QTCB type is not supported by the FCP adapter\n");
 348                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
 349                 break;
 350         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 351                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 352                                 &adapter->status);
 353                 break;
 354         case FSF_PROT_DUPLICATE_REQUEST_ID:
 355                 dev_err(&adapter->ccw_device->dev,
 356                         "0x%Lx is an ambiguous request identifier\n",
 357                         (unsigned long long)qtcb->bottom.support.req_handle);
 358                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
 359                 break;
 360         case FSF_PROT_LINK_DOWN:
 361                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 362                 /* go through reopen to flush pending requests */
 363                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
 364                 break;
 365         case FSF_PROT_REEST_QUEUE:
 366                 /* All ports should be marked as ready to run again */
 367                 zfcp_erp_set_adapter_status(adapter,
 368                                             ZFCP_STATUS_COMMON_RUNNING);
 369                 zfcp_erp_adapter_reopen(adapter,
 370                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 371                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 372                                         "fspse_8", req);
 373                 break;
 374         default:
 375                 dev_err(&adapter->ccw_device->dev,
 376                         "0x%x is not a valid transfer protocol status\n",
 377                         qtcb->prefix.prot_status);
 378                 zfcp_qdio_siosl(adapter);
 379                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
 380         }
 381         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 382 }
 383
 384 /**
 385  * zfcp_fsf_req_complete - process completion of a FSF request
 386  * @fsf_req: The FSF request that has been completed.
 387  *
 388  * When a request has been completed either from the FCP adapter,
 389  * or it has been dismissed due to a queue shutdown, this function
 390  * is called to process the completion status and trigger further
 391  * events related to the FSF request.
 392  */
 393 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 394 {
 395         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 396                 zfcp_fsf_status_read_handler(req);
 397                 return;
 398         }
 399
 400         del_timer(&req->timer);
 401         zfcp_fsf_protstatus_eval(req);
 402         zfcp_fsf_fsfstatus_eval(req);
 403         req->handler(req);
 404
 405         if (req->erp_action)
 406                 zfcp_erp_notify(req->erp_action, 0);
 407
 408         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 409                 zfcp_fsf_req_free(req);
 410         else
 411                 complete(&req->completion);
 412 }
 413
 414 /**
 415  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 416  * @adapter: pointer to struct zfcp_adapter
 417  *
 418  * Never ever call this without shutting down the adapter first.
 419  * Otherwise the adapter would continue using and corrupting s390 storage.
 420  * Included BUG_ON() call to ensure this is done.
 421  * ERP is supposed to be the only user of this function.
 422  */
 423 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 424 {
 425         struct zfcp_fsf_req *req, *tmp;
 426         LIST_HEAD(remove_queue);
 427
 428         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 429         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 430
 431         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 432                 list_del(&req->list);
 433                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 434                 zfcp_fsf_req_complete(req);
 435         }
 436 }
 437
 438 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 439 {
 440         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 441         struct zfcp_adapter *adapter = req->adapter;
 442         struct Scsi_Host *shost = adapter->scsi_host;
 443         struct fc_els_flogi *nsp, *plogi;
 444
 445         /* adjust pointers for missing command code */
 446         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 447                                         - sizeof(u32));
 448         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 449                                         - sizeof(u32));
 450
 451         if (req->data)
 452                 memcpy(req->data, bottom, sizeof(*bottom));
 453
 454         fc_host_port_name(shost) = nsp->fl_wwpn;
 455         fc_host_node_name(shost) = nsp->fl_wwnn;
 456         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 457         fc_host_speed(shost) = bottom->fc_link_speed;
 458         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 459
 460         adapter->hydra_version = bottom->adapter_type;
 461         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 462         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 463                                          (u16)FSF_STATUS_READS_RECOM);
 464
 465         if (fc_host_permanent_port_name(shost) == -1)
 466                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 467
 468         switch (bottom->fc_topology) {
 469         case FSF_TOPO_P2P:
 470                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 471                 adapter->peer_wwpn = plogi->fl_wwpn;
 472                 adapter->peer_wwnn = plogi->fl_wwnn;
 473                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 474                 break;
 475         case FSF_TOPO_FABRIC:
 476                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 477                 break;
 478         case FSF_TOPO_AL:
 479                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 480                 /* fall through */
 481         default:
 482                 dev_err(&adapter->ccw_device->dev,
 483                         "Unknown or unsupported arbitrated loop "
 484                         "fibre channel topology detected\n");
 485                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
 486                 return -EIO;
 487         }
 488
 489         zfcp_scsi_set_prot(adapter);
 490
 491         return 0;
 492 }
 493
 494 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 495 {
 496         struct zfcp_adapter *adapter = req->adapter;
 497         struct fsf_qtcb *qtcb = req->qtcb;
 498         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 499         struct Scsi_Host *shost = adapter->scsi_host;
 500
 501         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 502                 return;
 503
 504         adapter->fsf_lic_version = bottom->lic_version;
 505         adapter->adapter_features = bottom->adapter_features;
 506         adapter->connection_features = bottom->connection_features;
 507         adapter->peer_wwpn = 0;
 508         adapter->peer_wwnn = 0;
 509         adapter->peer_d_id = 0;
 510
 511         switch (qtcb->header.fsf_status) {
 512         case FSF_GOOD:
 513                 if (zfcp_fsf_exchange_config_evaluate(req))
 514                         return;
 515
 516                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 517                         dev_err(&adapter->ccw_device->dev,
 518                                 "FCP adapter maximum QTCB size (%d bytes) "
 519                                 "is too small\n",
 520                                 bottom->max_qtcb_size);
 521                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
 522                         return;
 523                 }
 524                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 525                                 &adapter->status);
 526                 break;
 527         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 528                 fc_host_node_name(shost) = 0;
 529                 fc_host_port_name(shost) = 0;
 530                 fc_host_port_id(shost) = 0;
 531                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 532                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 533                 adapter->hydra_version = 0;
 534
 535                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 536                                 &adapter->status);
 537
 538                 zfcp_fsf_link_down_info_eval(req,
 539                         &qtcb->header.fsf_status_qual.link_down_info);
 540                 break;
 541         default:
 542                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
 543                 return;
 544         }
 545
 546         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 547                 adapter->hardware_version = bottom->hardware_version;
 548                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 549                        min(FC_SERIAL_NUMBER_SIZE, 17));
 550                 EBCASC(fc_host_serial_number(shost),
 551                        min(FC_SERIAL_NUMBER_SIZE, 17));
 552         }
 553
 554         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 555                 dev_err(&adapter->ccw_device->dev,
 556                         "The FCP adapter only supports newer "
 557                         "control block versions\n");
 558                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
 559                 return;
 560         }
 561         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 562                 dev_err(&adapter->ccw_device->dev,
 563                         "The FCP adapter only supports older "
 564                         "control block versions\n");
 565                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
 566         }
 567 }
 568
 569 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 570 {
 571         struct zfcp_adapter *adapter = req->adapter;
 572         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 573         struct Scsi_Host *shost = adapter->scsi_host;
 574
 575         if (req->data)
 576                 memcpy(req->data, bottom, sizeof(*bottom));
 577
 578         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 579                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 580                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 581         } else
 582                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 583         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 584         fc_host_supported_speeds(shost) = bottom->supported_speed;
 585         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 586                FC_FC4_LIST_SIZE);
 587         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 588                FC_FC4_LIST_SIZE);
 589 }
 590
 591 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 592 {
 593         struct fsf_qtcb *qtcb = req->qtcb;
 594
 595         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 596                 return;
 597
 598         switch (qtcb->header.fsf_status) {
 599         case FSF_GOOD:
 600                 zfcp_fsf_exchange_port_evaluate(req);
 601                 break;
 602         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 603                 zfcp_fsf_exchange_port_evaluate(req);
 604                 zfcp_fsf_link_down_info_eval(req,
 605                         &qtcb->header.fsf_status_qual.link_down_info);
 606                 break;
 607         }
 608 }
 609
 610 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 611 {
 612         struct zfcp_fsf_req *req;
 613
 614         if (likely(pool))
 615                 req = mempool_alloc(pool, GFP_ATOMIC);
 616         else
 617                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 618
 619         if (unlikely(!req))
 620                 return NULL;
 621
 622         memset(req, 0, sizeof(*req));
 623         req->pool = pool;
 624         return req;
 625 }
 626
 627 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 628 {
 629         struct fsf_qtcb *qtcb;
 630
 631         if (likely(pool))
 632                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 633         else
 634                 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
 635
 636         if (unlikely(!qtcb))
 637                 return NULL;
 638
 639         memset(qtcb, 0, sizeof(*qtcb));
 640         return qtcb;
 641 }
 642
 643 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 644                                                 u32 fsf_cmd, u32 sbtype,
 645                                                 mempool_t *pool)
 646 {
 647         struct zfcp_adapter *adapter = qdio->adapter;
 648         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 649
 650         if (unlikely(!req))
 651                 return ERR_PTR(-ENOMEM);
 652
 653         if (adapter->req_no == 0)
 654                 adapter->req_no++;
 655
 656         INIT_LIST_HEAD(&req->list);
 657         init_timer(&req->timer);
 658         init_completion(&req->completion);
 659
 660         req->adapter = adapter;
 661         req->fsf_command = fsf_cmd;
 662         req->req_id = adapter->req_no;
 663
 664         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 665                 if (likely(pool))
 666                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 667                 else
 668                         req->qtcb = zfcp_qtcb_alloc(NULL);
 669
 670                 if (unlikely(!req->qtcb)) {
 671                         zfcp_fsf_req_free(req);
 672                         return ERR_PTR(-ENOMEM);
 673                 }
 674
 675                 req->seq_no = adapter->fsf_req_seq_no;
 676                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 677                 req->qtcb->prefix.req_id = req->req_id;
 678                 req->qtcb->prefix.ulp_info = 26;
 679                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 680                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 681                 req->qtcb->header.req_handle = req->req_id;
 682                 req->qtcb->header.fsf_command = req->fsf_command;
 683         }
 684
 685         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 686                            req->qtcb, sizeof(struct fsf_qtcb));
 687
 688         return req;
 689 }
 690
 691 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 692 {
 693         struct zfcp_adapter *adapter = req->adapter;
 694         struct zfcp_qdio *qdio = adapter->qdio;
 695         int with_qtcb = (req->qtcb != NULL);
 696         int req_id = req->req_id;
 697
 698         zfcp_reqlist_add(adapter->req_list, req);
 699
 700         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 701         req->issued = get_clock();
 702         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 703                 del_timer(&req->timer);
 704                 /* lookup request again, list might have changed */
 705                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 706                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
 707                 return -EIO;
 708         }
 709
 710         /* Don't increase for unsolicited status */
 711         if (with_qtcb)
 712                 adapter->fsf_req_seq_no++;
 713         adapter->req_no++;
 714
 715         return 0;
 716 }
 717
 718 /**
 719  * zfcp_fsf_status_read - send status read request
 720  * @adapter: pointer to struct zfcp_adapter
 721  * @req_flags: request flags
 722  * Returns: 0 on success, ERROR otherwise
 723  */
 724 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 725 {
 726         struct zfcp_adapter *adapter = qdio->adapter;
 727         struct zfcp_fsf_req *req;
 728         struct fsf_status_read_buffer *sr_buf;
 729         int retval = -EIO;
 730
 731         spin_lock_irq(&qdio->req_q_lock);
 732         if (zfcp_qdio_sbal_get(qdio))
 733                 goto out;
 734
 735         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
 736                                   adapter->pool.status_read_req);
 737         if (IS_ERR(req)) {
 738                 retval = PTR_ERR(req);
 739                 goto out;
 740         }
 741
 742         sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 743         if (!sr_buf) {
 744                 retval = -ENOMEM;
 745                 goto failed_buf;
 746         }
 747         memset(sr_buf, 0, sizeof(*sr_buf));
 748         req->data = sr_buf;
 749
 750         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 751         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 752
 753         retval = zfcp_fsf_req_send(req);
 754         if (retval)
 755                 goto failed_req_send;
 756
 757         goto out;
 758
 759 failed_req_send:
 760         mempool_free(sr_buf, adapter->pool.status_read_data);
 761 failed_buf:
 762         zfcp_fsf_req_free(req);
 763         zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
 764 out:
 765         spin_unlock_irq(&qdio->req_q_lock);
 766         return retval;
 767 }
 768
 769 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 770 {
 771         struct scsi_device *sdev = req->data;
 772         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 773         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 774
 775         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 776                 return;
 777
 778         switch (req->qtcb->header.fsf_status) {
 779         case FSF_PORT_HANDLE_NOT_VALID:
 780                 if (fsq->word[0] == fsq->word[1]) {
 781                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 782                                                 "fsafch1", req);
 783                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 784                 }
 785                 break;
 786         case FSF_LUN_HANDLE_NOT_VALID:
 787                 if (fsq->word[0] == fsq->word[1]) {
 788                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2",
 789                                              req);
 790                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 791                 }
 792                 break;
 793         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 794                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 795                 break;
 796         case FSF_PORT_BOXED:
 797                 zfcp_erp_set_port_status(zfcp_sdev->port,
 798                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 799                 zfcp_erp_port_reopen(zfcp_sdev->port,
 800                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3",
 801                                      req);
 802                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 803                 break;
 804         case FSF_LUN_BOXED:
 805                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 806                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 807                                     "fsafch4", req);
 808                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 809                 break;
 810         case FSF_ADAPTER_STATUS_AVAILABLE:
 811                 switch (fsq->word[0]) {
 812                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 813                         zfcp_fc_test_link(zfcp_sdev->port);
 814                         /* fall through */
 815                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 816                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 817                         break;
 818                 }
 819                 break;
 820         case FSF_GOOD:
 821                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 822                 break;
 823         }
 824 }
 825
 826 /**
 827  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 828  * @scmnd: The SCSI command to abort
 829  * Returns: pointer to struct zfcp_fsf_req
 830  */
 831
 832 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 833 {
 834         struct zfcp_fsf_req *req = NULL;
 835         struct scsi_device *sdev = scmnd->device;
 836         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 837         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 838         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 839
 840         spin_lock_irq(&qdio->req_q_lock);
 841         if (zfcp_qdio_sbal_get(qdio))
 842                 goto out;
 843         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 844                                   SBAL_FLAGS0_TYPE_READ,
 845                                   qdio->adapter->pool.scsi_abort);
 846         if (IS_ERR(req)) {
 847                 req = NULL;
 848                 goto out;
 849         }
 850
 851         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 852                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 853                 goto out_error_free;
 854
 855         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 856
 857         req->data = zfcp_sdev;
 858         req->handler = zfcp_fsf_abort_fcp_command_handler;
 859         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 860         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 861         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 862
 863         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 864         if (!zfcp_fsf_req_send(req))
 865                 goto out;
 866
 867 out_error_free:
 868         zfcp_fsf_req_free(req);
 869         req = NULL;
 870 out:
 871         spin_unlock_irq(&qdio->req_q_lock);
 872         return req;
 873 }
 874
 875 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 876 {
 877         struct zfcp_adapter *adapter = req->adapter;
 878         struct zfcp_fsf_ct_els *ct = req->data;
 879         struct fsf_qtcb_header *header = &req->qtcb->header;
 880
 881         ct->status = -EINVAL;
 882
 883         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 884                 goto skip_fsfstatus;
 885
 886         switch (header->fsf_status) {
 887         case FSF_GOOD:
 888                 zfcp_dbf_san_ct_response(req);
 889                 ct->status = 0;
 890                 break;
 891         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 892                 zfcp_fsf_class_not_supp(req);
 893                 break;
 894         case FSF_ADAPTER_STATUS_AVAILABLE:
 895                 switch (header->fsf_status_qual.word[0]){
 896                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 897                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 898                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 899                         break;
 900                 }
 901                 break;
 902         case FSF_ACCESS_DENIED:
 903                 break;
 904         case FSF_PORT_BOXED:
 905                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 906                 break;
 907         case FSF_PORT_HANDLE_NOT_VALID:
 908                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
 909                 /* fall through */
 910         case FSF_GENERIC_COMMAND_REJECTED:
 911         case FSF_PAYLOAD_SIZE_MISMATCH:
 912         case FSF_REQUEST_SIZE_TOO_LARGE:
 913         case FSF_RESPONSE_SIZE_TOO_LARGE:
 914         case FSF_SBAL_MISMATCH:
 915                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 916                 break;
 917         }
 918
 919 skip_fsfstatus:
 920         if (ct->handler)
 921                 ct->handler(ct->handler_data);
 922 }
 923
 924 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 925                                             struct zfcp_qdio_req *q_req,
 926                                             struct scatterlist *sg_req,
 927                                             struct scatterlist *sg_resp)
 928 {
 929         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 930         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 931         zfcp_qdio_set_sbale_last(qdio, q_req);
 932 }
 933
 934 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 935                                        struct scatterlist *sg_req,
 936                                        struct scatterlist *sg_resp)
 937 {
 938         struct zfcp_adapter *adapter = req->adapter;
 939         u32 feat = adapter->adapter_features;
 940         int bytes;
 941
 942         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
 943                 if (!zfcp_qdio_sg_one_sbale(sg_req) ||
 944                     !zfcp_qdio_sg_one_sbale(sg_resp))
 945                         return -EOPNOTSUPP;
 946
 947                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 948                                                 sg_req, sg_resp);
 949                 return 0;
 950         }
 951
 952         /* use single, unchained SBAL if it can hold the request */
 953         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 954                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 955                                                 sg_req, sg_resp);
 956                 return 0;
 957         }
 958
 959         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, sg_req);
 960         if (bytes <= 0)
 961                 return -EIO;
 962         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 963         req->qtcb->bottom.support.req_buf_length = bytes;
 964         zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
 965
 966         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
 967                                         sg_resp);
 968         req->qtcb->bottom.support.resp_buf_length = bytes;
 969         if (bytes <= 0)
 970                 return -EIO;
 971         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 972
 973         return 0;
 974 }
 975
 976 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
 977                                  struct scatterlist *sg_req,
 978                                  struct scatterlist *sg_resp,
 979                                  unsigned int timeout)
 980 {
 981         int ret;
 982
 983         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
 984         if (ret)
 985                 return ret;
 986
 987         /* common settings for ct/gs and els requests */
 988         if (timeout > 255)
 989                 timeout = 255; /* max value accepted by hardware */
 990         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
 991         req->qtcb->bottom.support.timeout = timeout;
 992         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
 993
 994         return 0;
 995 }
 996
 997 /**
 998  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
 999  * @ct: pointer to struct zfcp_send_ct with data for request
1000  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1001  */
1002 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1003                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1004                      unsigned int timeout)
1005 {
1006         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1007         struct zfcp_fsf_req *req;
1008         int ret = -EIO;
1009
1010         spin_lock_irq(&qdio->req_q_lock);
1011         if (zfcp_qdio_sbal_get(qdio))
1012                 goto out;
1013
1014         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1015                                   SBAL_FLAGS0_TYPE_WRITE_READ, pool);
1016
1017         if (IS_ERR(req)) {
1018                 ret = PTR_ERR(req);
1019                 goto out;
1020         }
1021
1022         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1023         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1024         if (ret)
1025                 goto failed_send;
1026
1027         req->handler = zfcp_fsf_send_ct_handler;
1028         req->qtcb->header.port_handle = wka_port->handle;
1029         req->data = ct;
1030
1031         zfcp_dbf_san_ct_request(req, wka_port->d_id);
1032
1033         ret = zfcp_fsf_req_send(req);
1034         if (ret)
1035                 goto failed_send;
1036
1037         goto out;
1038
1039 failed_send:
1040         zfcp_fsf_req_free(req);
1041 out:
1042         spin_unlock_irq(&qdio->req_q_lock);
1043         return ret;
1044 }
1045
1046 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1047 {
1048         struct zfcp_fsf_ct_els *send_els = req->data;
1049         struct zfcp_port *port = send_els->port;
1050         struct fsf_qtcb_header *header = &req->qtcb->header;
1051
1052         send_els->status = -EINVAL;
1053
1054         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1055                 goto skip_fsfstatus;
1056
1057         switch (header->fsf_status) {
1058         case FSF_GOOD:
1059                 zfcp_dbf_san_els_response(req);
1060                 send_els->status = 0;
1061                 break;
1062         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1063                 zfcp_fsf_class_not_supp(req);
1064                 break;
1065         case FSF_ADAPTER_STATUS_AVAILABLE:
1066                 switch (header->fsf_status_qual.word[0]){
1067                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1068                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1069                 case FSF_SQ_RETRY_IF_POSSIBLE:
1070                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1071                         break;
1072                 }
1073                 break;
1074         case FSF_ELS_COMMAND_REJECTED:
1075         case FSF_PAYLOAD_SIZE_MISMATCH:
1076         case FSF_REQUEST_SIZE_TOO_LARGE:
1077         case FSF_RESPONSE_SIZE_TOO_LARGE:
1078                 break;
1079         case FSF_ACCESS_DENIED:
1080                 if (port) {
1081                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1082                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1083                 }
1084                 break;
1085         case FSF_SBAL_MISMATCH:
1086                 /* should never occure, avoided in zfcp_fsf_send_els */
1087                 /* fall through */
1088         default:
1089                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1090                 break;
1091         }
1092 skip_fsfstatus:
1093         if (send_els->handler)
1094                 send_els->handler(send_els->handler_data);
1095 }
1096
1097 /**
1098  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1099  * @els: pointer to struct zfcp_send_els with data for the command
1100  */
1101 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1102                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1103 {
1104         struct zfcp_fsf_req *req;
1105         struct zfcp_qdio *qdio = adapter->qdio;
1106         int ret = -EIO;
1107
1108         spin_lock_irq(&qdio->req_q_lock);
1109         if (zfcp_qdio_sbal_get(qdio))
1110                 goto out;
1111
1112         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1113                                   SBAL_FLAGS0_TYPE_WRITE_READ, NULL);
1114
1115         if (IS_ERR(req)) {
1116                 ret = PTR_ERR(req);
1117                 goto out;
1118         }
1119
1120         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1121
1122         zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1123
1124         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1125
1126         if (ret)
1127                 goto failed_send;
1128
1129         hton24(req->qtcb->bottom.support.d_id, d_id);
1130         req->handler = zfcp_fsf_send_els_handler;
1131         req->data = els;
1132
1133         zfcp_dbf_san_els_request(req);
1134
1135         ret = zfcp_fsf_req_send(req);
1136         if (ret)
1137                 goto failed_send;
1138
1139         goto out;
1140
1141 failed_send:
1142         zfcp_fsf_req_free(req);
1143 out:
1144         spin_unlock_irq(&qdio->req_q_lock);
1145         return ret;
1146 }
1147
1148 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1149 {
1150         struct zfcp_fsf_req *req;
1151         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1152         int retval = -EIO;
1153
1154         spin_lock_irq(&qdio->req_q_lock);
1155         if (zfcp_qdio_sbal_get(qdio))
1156                 goto out;
1157
1158         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1159                                   SBAL_FLAGS0_TYPE_READ,
1160                                   qdio->adapter->pool.erp_req);
1161
1162         if (IS_ERR(req)) {
1163                 retval = PTR_ERR(req);
1164                 goto out;
1165         }
1166
1167         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1168         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1169
1170         req->qtcb->bottom.config.feature_selection =
1171                         FSF_FEATURE_CFDC |
1172                         FSF_FEATURE_LUN_SHARING |
1173                         FSF_FEATURE_NOTIFICATION_LOST |
1174                         FSF_FEATURE_UPDATE_ALERT;
1175         req->erp_action = erp_action;
1176         req->handler = zfcp_fsf_exchange_config_data_handler;
1177         erp_action->fsf_req_id = req->req_id;
1178
1179         zfcp_fsf_start_erp_timer(req);
1180         retval = zfcp_fsf_req_send(req);
1181         if (retval) {
1182                 zfcp_fsf_req_free(req);
1183                 erp_action->fsf_req_id = 0;
1184         }
1185 out:
1186         spin_unlock_irq(&qdio->req_q_lock);
1187         return retval;
1188 }
1189
1190 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1191                                        struct fsf_qtcb_bottom_config *data)
1192 {
1193         struct zfcp_fsf_req *req = NULL;
1194         int retval = -EIO;
1195
1196         spin_lock_irq(&qdio->req_q_lock);
1197         if (zfcp_qdio_sbal_get(qdio))
1198                 goto out_unlock;
1199
1200         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1201                                   SBAL_FLAGS0_TYPE_READ, NULL);
1202
1203         if (IS_ERR(req)) {
1204                 retval = PTR_ERR(req);
1205                 goto out_unlock;
1206         }
1207
1208         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1209         req->handler = zfcp_fsf_exchange_config_data_handler;
1210
1211         req->qtcb->bottom.config.feature_selection =
1212                         FSF_FEATURE_CFDC |
1213                         FSF_FEATURE_LUN_SHARING |
1214                         FSF_FEATURE_NOTIFICATION_LOST |
1215                         FSF_FEATURE_UPDATE_ALERT;
1216
1217         if (data)
1218                 req->data = data;
1219
1220         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1221         retval = zfcp_fsf_req_send(req);
1222         spin_unlock_irq(&qdio->req_q_lock);
1223         if (!retval)
1224                 wait_for_completion(&req->completion);
1225
1226         zfcp_fsf_req_free(req);
1227         return retval;
1228
1229 out_unlock:
1230         spin_unlock_irq(&qdio->req_q_lock);
1231         return retval;
1232 }
1233
1234 /**
1235  * zfcp_fsf_exchange_port_data - request information about local port
1236  * @erp_action: ERP action for the adapter for which port data is requested
1237  * Returns: 0 on success, error otherwise
1238  */
1239 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1240 {
1241         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1242         struct zfcp_fsf_req *req;
1243         int retval = -EIO;
1244
1245         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1246                 return -EOPNOTSUPP;
1247
1248         spin_lock_irq(&qdio->req_q_lock);
1249         if (zfcp_qdio_sbal_get(qdio))
1250                 goto out;
1251
1252         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1253                                   SBAL_FLAGS0_TYPE_READ,
1254                                   qdio->adapter->pool.erp_req);
1255
1256         if (IS_ERR(req)) {
1257                 retval = PTR_ERR(req);
1258                 goto out;
1259         }
1260
1261         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1262         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1263
1264         req->handler = zfcp_fsf_exchange_port_data_handler;
1265         req->erp_action = erp_action;
1266         erp_action->fsf_req_id = req->req_id;
1267
1268         zfcp_fsf_start_erp_timer(req);
1269         retval = zfcp_fsf_req_send(req);
1270         if (retval) {
1271                 zfcp_fsf_req_free(req);
1272                 erp_action->fsf_req_id = 0;
1273         }
1274 out:
1275         spin_unlock_irq(&qdio->req_q_lock);
1276         return retval;
1277 }
1278
1279 /**
1280  * zfcp_fsf_exchange_port_data_sync - request information about local port
1281  * @qdio: pointer to struct zfcp_qdio
1282  * @data: pointer to struct fsf_qtcb_bottom_port
1283  * Returns: 0 on success, error otherwise
1284  */
1285 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1286                                      struct fsf_qtcb_bottom_port *data)
1287 {
1288         struct zfcp_fsf_req *req = NULL;
1289         int retval = -EIO;
1290
1291         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1292                 return -EOPNOTSUPP;
1293
1294         spin_lock_irq(&qdio->req_q_lock);
1295         if (zfcp_qdio_sbal_get(qdio))
1296                 goto out_unlock;
1297
1298         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1299                                   SBAL_FLAGS0_TYPE_READ, NULL);
1300
1301         if (IS_ERR(req)) {
1302                 retval = PTR_ERR(req);
1303                 goto out_unlock;
1304         }
1305
1306         if (data)
1307                 req->data = data;
1308
1309         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1310
1311         req->handler = zfcp_fsf_exchange_port_data_handler;
1312         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1313         retval = zfcp_fsf_req_send(req);
1314         spin_unlock_irq(&qdio->req_q_lock);
1315
1316         if (!retval)
1317                 wait_for_completion(&req->completion);
1318
1319         zfcp_fsf_req_free(req);
1320
1321         return retval;
1322
1323 out_unlock:
1324         spin_unlock_irq(&qdio->req_q_lock);
1325         return retval;
1326 }
1327
1328 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1329 {
1330         struct zfcp_port *port = req->data;
1331         struct fsf_qtcb_header *header = &req->qtcb->header;
1332         struct fc_els_flogi *plogi;
1333
1334         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1335                 goto out;
1336
1337         switch (header->fsf_status) {
1338         case FSF_PORT_ALREADY_OPEN:
1339                 break;
1340         case FSF_ACCESS_DENIED:
1341                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1342                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1343                 break;
1344         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1345                 dev_warn(&req->adapter->ccw_device->dev,
1346                          "Not enough FCP adapter resources to open "
1347                          "remote port 0x%016Lx\n",
1348                          (unsigned long long)port->wwpn);
1349                 zfcp_erp_set_port_status(port,
1350                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1351                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1352                 break;
1353         case FSF_ADAPTER_STATUS_AVAILABLE:
1354                 switch (header->fsf_status_qual.word[0]) {
1355                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1356                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1357                 case FSF_SQ_NO_RETRY_POSSIBLE:
1358                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1359                         break;
1360                 }
1361                 break;
1362         case FSF_GOOD:
1363                 port->handle = header->port_handle;
1364                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1365                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1366                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1367                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1368                                   &port->status);
1369                 /* check whether D_ID has changed during open */
1370                 /*
1371                  * FIXME: This check is not airtight, as the FCP channel does
1372                  * not monitor closures of target port connections caused on
1373                  * the remote side. Thus, they might miss out on invalidating
1374                  * locally cached WWPNs (and other N_Port parameters) of gone
1375                  * target ports. So, our heroic attempt to make things safe
1376                  * could be undermined by 'open port' response data tagged with
1377                  * obsolete WWPNs. Another reason to monitor potential
1378                  * connection closures ourself at least (by interpreting
1379                  * incoming ELS' and unsolicited status). It just crosses my
1380                  * mind that one should be able to cross-check by means of
1381                  * another GID_PN straight after a port has been opened.
1382                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1383                  */
1384                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1385                 if (req->qtcb->bottom.support.els1_length >=
1386                     FSF_PLOGI_MIN_LEN)
1387                                 zfcp_fc_plogi_evaluate(port, plogi);
1388                 break;
1389         case FSF_UNKNOWN_OP_SUBTYPE:
1390                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1391                 break;
1392         }
1393
1394 out:
1395         put_device(&port->dev);
1396 }
1397
1398 /**
1399  * zfcp_fsf_open_port - create and send open port request
1400  * @erp_action: pointer to struct zfcp_erp_action
1401  * Returns: 0 on success, error otherwise
1402  */
1403 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1404 {
1405         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1406         struct zfcp_port *port = erp_action->port;
1407         struct zfcp_fsf_req *req;
1408         int retval = -EIO;
1409
1410         spin_lock_irq(&qdio->req_q_lock);
1411         if (zfcp_qdio_sbal_get(qdio))
1412                 goto out;
1413
1414         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1415                                   SBAL_FLAGS0_TYPE_READ,
1416                                   qdio->adapter->pool.erp_req);
1417
1418         if (IS_ERR(req)) {
1419                 retval = PTR_ERR(req);
1420                 goto out;
1421         }
1422
1423         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1424         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1425
1426         req->handler = zfcp_fsf_open_port_handler;
1427         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1428         req->data = port;
1429         req->erp_action = erp_action;
1430         erp_action->fsf_req_id = req->req_id;
1431         get_device(&port->dev);
1432
1433         zfcp_fsf_start_erp_timer(req);
1434         retval = zfcp_fsf_req_send(req);
1435         if (retval) {
1436                 zfcp_fsf_req_free(req);
1437                 erp_action->fsf_req_id = 0;
1438                 put_device(&port->dev);
1439         }
1440 out:
1441         spin_unlock_irq(&qdio->req_q_lock);
1442         return retval;
1443 }
1444
1445 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1446 {
1447         struct zfcp_port *port = req->data;
1448
1449         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1450                 return;
1451
1452         switch (req->qtcb->header.fsf_status) {
1453         case FSF_PORT_HANDLE_NOT_VALID:
1454                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1455                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1456                 break;
1457         case FSF_ADAPTER_STATUS_AVAILABLE:
1458                 break;
1459         case FSF_GOOD:
1460                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1461                 break;
1462         }
1463 }
1464
1465 /**
1466  * zfcp_fsf_close_port - create and send close port request
1467  * @erp_action: pointer to struct zfcp_erp_action
1468  * Returns: 0 on success, error otherwise
1469  */
1470 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1471 {
1472         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1473         struct zfcp_fsf_req *req;
1474         int retval = -EIO;
1475
1476         spin_lock_irq(&qdio->req_q_lock);
1477         if (zfcp_qdio_sbal_get(qdio))
1478                 goto out;
1479
1480         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1481                                   SBAL_FLAGS0_TYPE_READ,
1482                                   qdio->adapter->pool.erp_req);
1483
1484         if (IS_ERR(req)) {
1485                 retval = PTR_ERR(req);
1486                 goto out;
1487         }
1488
1489         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1490         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1491
1492         req->handler = zfcp_fsf_close_port_handler;
1493         req->data = erp_action->port;
1494         req->erp_action = erp_action;
1495         req->qtcb->header.port_handle = erp_action->port->handle;
1496         erp_action->fsf_req_id = req->req_id;
1497
1498         zfcp_fsf_start_erp_timer(req);
1499         retval = zfcp_fsf_req_send(req);
1500         if (retval) {
1501                 zfcp_fsf_req_free(req);
1502                 erp_action->fsf_req_id = 0;
1503         }
1504 out:
1505         spin_unlock_irq(&qdio->req_q_lock);
1506         return retval;
1507 }
1508
1509 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1510 {
1511         struct zfcp_fc_wka_port *wka_port = req->data;
1512         struct fsf_qtcb_header *header = &req->qtcb->header;
1513
1514         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1515                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1516                 goto out;
1517         }
1518
1519         switch (header->fsf_status) {
1520         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1521                 dev_warn(&req->adapter->ccw_device->dev,
1522                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1523                 /* fall through */
1524         case FSF_ADAPTER_STATUS_AVAILABLE:
1525                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1526                 /* fall through */
1527         case FSF_ACCESS_DENIED:
1528                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1529                 break;
1530         case FSF_GOOD:
1531                 wka_port->handle = header->port_handle;
1532                 /* fall through */
1533         case FSF_PORT_ALREADY_OPEN:
1534                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1535         }
1536 out:
1537         wake_up(&wka_port->completion_wq);
1538 }
1539
1540 /**
1541  * zfcp_fsf_open_wka_port - create and send open wka-port request
1542  * @wka_port: pointer to struct zfcp_fc_wka_port
1543  * Returns: 0 on success, error otherwise
1544  */
1545 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1546 {
1547         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1548         struct zfcp_fsf_req *req;
1549         int retval = -EIO;
1550
1551         spin_lock_irq(&qdio->req_q_lock);
1552         if (zfcp_qdio_sbal_get(qdio))
1553                 goto out;
1554
1555         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1556                                   SBAL_FLAGS0_TYPE_READ,
1557                                   qdio->adapter->pool.erp_req);
1558
1559         if (unlikely(IS_ERR(req))) {
1560                 retval = PTR_ERR(req);
1561                 goto out;
1562         }
1563
1564         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1565         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1566
1567         req->handler = zfcp_fsf_open_wka_port_handler;
1568         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1569         req->data = wka_port;
1570
1571         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1572         retval = zfcp_fsf_req_send(req);
1573         if (retval)
1574                 zfcp_fsf_req_free(req);
1575 out:
1576         spin_unlock_irq(&qdio->req_q_lock);
1577         return retval;
1578 }
1579
1580 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1581 {
1582         struct zfcp_fc_wka_port *wka_port = req->data;
1583
1584         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1585                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1586                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1587         }
1588
1589         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1590         wake_up(&wka_port->completion_wq);
1591 }
1592
1593 /**
1594  * zfcp_fsf_close_wka_port - create and send close wka port request
1595  * @wka_port: WKA port to open
1596  * Returns: 0 on success, error otherwise
1597  */
1598 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1599 {
1600         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1601         struct zfcp_fsf_req *req;
1602         int retval = -EIO;
1603
1604         spin_lock_irq(&qdio->req_q_lock);
1605         if (zfcp_qdio_sbal_get(qdio))
1606                 goto out;
1607
1608         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1609                                   SBAL_FLAGS0_TYPE_READ,
1610                                   qdio->adapter->pool.erp_req);
1611
1612         if (unlikely(IS_ERR(req))) {
1613                 retval = PTR_ERR(req);
1614                 goto out;
1615         }
1616
1617         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1618         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1619
1620         req->handler = zfcp_fsf_close_wka_port_handler;
1621         req->data = wka_port;
1622         req->qtcb->header.port_handle = wka_port->handle;
1623
1624         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1625         retval = zfcp_fsf_req_send(req);
1626         if (retval)
1627                 zfcp_fsf_req_free(req);
1628 out:
1629         spin_unlock_irq(&qdio->req_q_lock);
1630         return retval;
1631 }
1632
1633 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1634 {
1635         struct zfcp_port *port = req->data;
1636         struct fsf_qtcb_header *header = &req->qtcb->header;
1637         struct scsi_device *sdev;
1638
1639         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1640                 return;
1641
1642         switch (header->fsf_status) {
1643         case FSF_PORT_HANDLE_NOT_VALID:
1644                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1645                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1646                 break;
1647         case FSF_ACCESS_DENIED:
1648                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1649                 break;
1650         case FSF_PORT_BOXED:
1651                 /* can't use generic zfcp_erp_modify_port_status because
1652                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1653                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1654                 shost_for_each_device(sdev, port->adapter->scsi_host)
1655                         if (sdev_to_zfcp(sdev)->port == port)
1656                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1657                                                   &sdev_to_zfcp(sdev)->status);
1658                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1659                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1660                                      "fscpph2", req);
1661                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1662                 break;
1663         case FSF_ADAPTER_STATUS_AVAILABLE:
1664                 switch (header->fsf_status_qual.word[0]) {
1665                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1666                         /* fall through */
1667                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1668                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1669                         break;
1670                 }
1671                 break;
1672         case FSF_GOOD:
1673                 /* can't use generic zfcp_erp_modify_port_status because
1674                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1675                  */
1676                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1677                 shost_for_each_device(sdev, port->adapter->scsi_host)
1678                         if (sdev_to_zfcp(sdev)->port == port)
1679                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1680                                                   &sdev_to_zfcp(sdev)->status);
1681                 break;
1682         }
1683 }
1684
1685 /**
1686  * zfcp_fsf_close_physical_port - close physical port
1687  * @erp_action: pointer to struct zfcp_erp_action
1688  * Returns: 0 on success
1689  */
1690 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1691 {
1692         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1693         struct zfcp_fsf_req *req;
1694         int retval = -EIO;
1695
1696         spin_lock_irq(&qdio->req_q_lock);
1697         if (zfcp_qdio_sbal_get(qdio))
1698                 goto out;
1699
1700         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1701                                   SBAL_FLAGS0_TYPE_READ,
1702                                   qdio->adapter->pool.erp_req);
1703
1704         if (IS_ERR(req)) {
1705                 retval = PTR_ERR(req);
1706                 goto out;
1707         }
1708
1709         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1710         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1711
1712         req->data = erp_action->port;
1713         req->qtcb->header.port_handle = erp_action->port->handle;
1714         req->erp_action = erp_action;
1715         req->handler = zfcp_fsf_close_physical_port_handler;
1716         erp_action->fsf_req_id = req->req_id;
1717
1718         zfcp_fsf_start_erp_timer(req);
1719         retval = zfcp_fsf_req_send(req);
1720         if (retval) {
1721                 zfcp_fsf_req_free(req);
1722                 erp_action->fsf_req_id = 0;
1723         }
1724 out:
1725         spin_unlock_irq(&qdio->req_q_lock);
1726         return retval;
1727 }
1728
1729 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1730 {
1731         struct zfcp_adapter *adapter = req->adapter;
1732         struct scsi_device *sdev = req->data;
1733         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1734         struct fsf_qtcb_header *header = &req->qtcb->header;
1735         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1736
1737         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1738                 return;
1739
1740         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1741                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1742                           ZFCP_STATUS_LUN_SHARED |
1743                           ZFCP_STATUS_LUN_READONLY,
1744                           &zfcp_sdev->status);
1745
1746         switch (header->fsf_status) {
1747
1748         case FSF_PORT_HANDLE_NOT_VALID:
1749                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1", req);
1750                 /* fall through */
1751         case FSF_LUN_ALREADY_OPEN:
1752                 break;
1753         case FSF_ACCESS_DENIED:
1754                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1755                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1756                 break;
1757         case FSF_PORT_BOXED:
1758                 zfcp_erp_set_port_status(zfcp_sdev->port,
1759                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1760                 zfcp_erp_port_reopen(zfcp_sdev->port,
1761                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2",
1762                                      req);
1763                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1764                 break;
1765         case FSF_LUN_SHARING_VIOLATION:
1766                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1767                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1768                 break;
1769         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1770                 dev_warn(&adapter->ccw_device->dev,
1771                          "No handle is available for LUN "
1772                          "0x%016Lx on port 0x%016Lx\n",
1773                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1774                          (unsigned long long)zfcp_sdev->port->wwpn);
1775                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1776                 /* fall through */
1777         case FSF_INVALID_COMMAND_OPTION:
1778                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1779                 break;
1780         case FSF_ADAPTER_STATUS_AVAILABLE:
1781                 switch (header->fsf_status_qual.word[0]) {
1782                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1783                         zfcp_fc_test_link(zfcp_sdev->port);
1784                         /* fall through */
1785                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1786                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1787                         break;
1788                 }
1789                 break;
1790
1791         case FSF_GOOD:
1792                 zfcp_sdev->lun_handle = header->lun_handle;
1793                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1794                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1795                 break;
1796         }
1797 }
1798
1799 /**
1800  * zfcp_fsf_open_lun - open LUN
1801  * @erp_action: pointer to struct zfcp_erp_action
1802  * Returns: 0 on success, error otherwise
1803  */
1804 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1805 {
1806         struct zfcp_adapter *adapter = erp_action->adapter;
1807         struct zfcp_qdio *qdio = adapter->qdio;
1808         struct zfcp_fsf_req *req;
1809         int retval = -EIO;
1810
1811         spin_lock_irq(&qdio->req_q_lock);
1812         if (zfcp_qdio_sbal_get(qdio))
1813                 goto out;
1814
1815         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1816                                   SBAL_FLAGS0_TYPE_READ,
1817                                   adapter->pool.erp_req);
1818
1819         if (IS_ERR(req)) {
1820                 retval = PTR_ERR(req);
1821                 goto out;
1822         }
1823
1824         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1825         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1826
1827         req->qtcb->header.port_handle = erp_action->port->handle;
1828         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1829         req->handler = zfcp_fsf_open_lun_handler;
1830         req->data = erp_action->sdev;
1831         req->erp_action = erp_action;
1832         erp_action->fsf_req_id = req->req_id;
1833
1834         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1835                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1836
1837         zfcp_fsf_start_erp_timer(req);
1838         retval = zfcp_fsf_req_send(req);
1839         if (retval) {
1840                 zfcp_fsf_req_free(req);
1841                 erp_action->fsf_req_id = 0;
1842         }
1843 out:
1844         spin_unlock_irq(&qdio->req_q_lock);
1845         return retval;
1846 }
1847
1848 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1849 {
1850         struct scsi_device *sdev = req->data;
1851         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1852
1853         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1854                 return;
1855
1856         switch (req->qtcb->header.fsf_status) {
1857         case FSF_PORT_HANDLE_NOT_VALID:
1858                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1",
1859                                         req);
1860                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1861                 break;
1862         case FSF_LUN_HANDLE_NOT_VALID:
1863                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2", req);
1864                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1865                 break;
1866         case FSF_PORT_BOXED:
1867                 zfcp_erp_set_port_status(zfcp_sdev->port,
1868                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1869                 zfcp_erp_port_reopen(zfcp_sdev->port,
1870                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3",
1871                                      req);
1872                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1873                 break;
1874         case FSF_ADAPTER_STATUS_AVAILABLE:
1875                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1876                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1877                         zfcp_fc_test_link(zfcp_sdev->port);
1878                         /* fall through */
1879                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1880                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1881                         break;
1882                 }
1883                 break;
1884         case FSF_GOOD:
1885                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1886                 break;
1887         }
1888 }
1889
1890 /**
1891  * zfcp_fsf_close_LUN - close LUN
1892  * @erp_action: pointer to erp_action triggering the "close LUN"
1893  * Returns: 0 on success, error otherwise
1894  */
1895 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1896 {
1897         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1898         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1899         struct zfcp_fsf_req *req;
1900         int retval = -EIO;
1901
1902         spin_lock_irq(&qdio->req_q_lock);
1903         if (zfcp_qdio_sbal_get(qdio))
1904                 goto out;
1905
1906         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1907                                   SBAL_FLAGS0_TYPE_READ,
1908                                   qdio->adapter->pool.erp_req);
1909
1910         if (IS_ERR(req)) {
1911                 retval = PTR_ERR(req);
1912                 goto out;
1913         }
1914
1915         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1916         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1917
1918         req->qtcb->header.port_handle = erp_action->port->handle;
1919         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1920         req->handler = zfcp_fsf_close_lun_handler;
1921         req->data = erp_action->sdev;
1922         req->erp_action = erp_action;
1923         erp_action->fsf_req_id = req->req_id;
1924
1925         zfcp_fsf_start_erp_timer(req);
1926         retval = zfcp_fsf_req_send(req);
1927         if (retval) {
1928                 zfcp_fsf_req_free(req);
1929                 erp_action->fsf_req_id = 0;
1930         }
1931 out:
1932         spin_unlock_irq(&qdio->req_q_lock);
1933         return retval;
1934 }
1935
1936 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1937 {
1938         lat_rec->sum += lat;
1939         lat_rec->min = min(lat_rec->min, lat);
1940         lat_rec->max = max(lat_rec->max, lat);
1941 }
1942
1943 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1944 {
1945         struct fsf_qual_latency_info *lat_in;
1946         struct latency_cont *lat = NULL;
1947         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scsi->device);
1948         struct zfcp_blk_drv_data blktrc;
1949         int ticks = req->adapter->timer_ticks;
1950
1951         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1952
1953         blktrc.flags = 0;
1954         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1955         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1956                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1957         blktrc.inb_usage = 0;
1958         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1959
1960         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1961             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1962                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1963                 blktrc.channel_lat = lat_in->channel_lat * ticks;
1964                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1965
1966                 switch (req->qtcb->bottom.io.data_direction) {
1967                 case FSF_DATADIR_DIF_READ_STRIP:
1968                 case FSF_DATADIR_DIF_READ_CONVERT:
1969                 case FSF_DATADIR_READ:
1970                         lat = &zfcp_sdev->latencies.read;
1971                         break;
1972                 case FSF_DATADIR_DIF_WRITE_INSERT:
1973                 case FSF_DATADIR_DIF_WRITE_CONVERT:
1974                 case FSF_DATADIR_WRITE:
1975                         lat = &zfcp_sdev->latencies.write;
1976                         break;
1977                 case FSF_DATADIR_CMND:
1978                         lat = &zfcp_sdev->latencies.cmd;
1979                         break;
1980                 }
1981
1982                 if (lat) {
1983                         spin_lock(&zfcp_sdev->latencies.lock);
1984                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
1985                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
1986                         lat->counter++;
1987                         spin_unlock(&zfcp_sdev->latencies.lock);
1988                 }
1989         }
1990
1991         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
1992                             sizeof(blktrc));
1993 }
1994
1995 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
1996 {
1997         struct scsi_cmnd *scmnd = req->data;
1998         struct scsi_device *sdev = scmnd->device;
1999         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2000         struct fsf_qtcb_header *header = &req->qtcb->header;
2001
2002         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2003                 return;
2004
2005         switch (header->fsf_status) {
2006         case FSF_HANDLE_MISMATCH:
2007         case FSF_PORT_HANDLE_NOT_VALID:
2008                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1",
2009                                         req);
2010                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2011                 break;
2012         case FSF_FCPLUN_NOT_VALID:
2013         case FSF_LUN_HANDLE_NOT_VALID:
2014                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2", req);
2015                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2016                 break;
2017         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2018                 zfcp_fsf_class_not_supp(req);
2019                 break;
2020         case FSF_ACCESS_DENIED:
2021                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2022                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2023                 break;
2024         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2025                 dev_err(&req->adapter->ccw_device->dev,
2026                         "Incorrect direction %d, LUN 0x%016Lx on port "
2027                         "0x%016Lx closed\n",
2028                         req->qtcb->bottom.io.data_direction,
2029                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2030                         (unsigned long long)zfcp_sdev->port->wwpn);
2031                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2032                                           "fssfch3", req);
2033                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2034                 break;
2035         case FSF_CMND_LENGTH_NOT_VALID:
2036                 dev_err(&req->adapter->ccw_device->dev,
2037                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2038                         "port 0x%016Lx closed\n",
2039                         req->qtcb->bottom.io.fcp_cmnd_length,
2040                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2041                         (unsigned long long)zfcp_sdev->port->wwpn);
2042                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2043                                           "fssfch4", req);
2044                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2045                 break;
2046         case FSF_PORT_BOXED:
2047                 zfcp_erp_set_port_status(zfcp_sdev->port,
2048                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2049                 zfcp_erp_port_reopen(zfcp_sdev->port,
2050                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5",
2051                                      req);
2052                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2053                 break;
2054         case FSF_LUN_BOXED:
2055                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2056                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2057                                     "fssfch6", req);
2058                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2059                 break;
2060         case FSF_ADAPTER_STATUS_AVAILABLE:
2061                 if (header->fsf_status_qual.word[0] ==
2062                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2063                         zfcp_fc_test_link(zfcp_sdev->port);
2064                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2065                 break;
2066         }
2067 }
2068
2069 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2070 {
2071         struct scsi_cmnd *scpnt;
2072         struct fcp_resp_with_ext *fcp_rsp;
2073         unsigned long flags;
2074
2075         zfcp_fsf_fcp_handler_common(req);
2076
2077         read_lock_irqsave(&req->adapter->abort_lock, flags);
2078
2079         scpnt = req->data;
2080         if (unlikely(!scpnt)) {
2081                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2082                 return;
2083         }
2084
2085         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2086                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2087                 goto skip_fsfstatus;
2088         }
2089
2090         switch (req->qtcb->header.fsf_status) {
2091         case FSF_INCONSISTENT_PROT_DATA:
2092         case FSF_INVALID_PROT_PARM:
2093                 set_host_byte(scpnt, DID_ERROR);
2094                 goto skip_fsfstatus;
2095         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2096                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2097                 goto skip_fsfstatus;
2098         case FSF_APP_TAG_CHECK_FAILURE:
2099                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2100                 goto skip_fsfstatus;
2101         case FSF_REF_TAG_CHECK_FAILURE:
2102                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2103                 goto skip_fsfstatus;
2104         }
2105         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2106         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2107
2108 skip_fsfstatus:
2109         zfcp_fsf_req_trace(req, scpnt);
2110         zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req);
2111
2112         scpnt->host_scribble = NULL;
2113         (scpnt->scsi_done) (scpnt);
2114         /*
2115          * We must hold this lock until scsi_done has been called.
2116          * Otherwise we may call scsi_done after abort regarding this
2117          * command has completed.
2118          * Note: scsi_done must not block!
2119          */
2120         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2121 }
2122
2123 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2124 {
2125         switch (scsi_get_prot_op(scsi_cmnd)) {
2126         case SCSI_PROT_NORMAL:
2127                 switch (scsi_cmnd->sc_data_direction) {
2128                 case DMA_NONE:
2129                         *data_dir = FSF_DATADIR_CMND;
2130                         break;
2131                 case DMA_FROM_DEVICE:
2132                         *data_dir = FSF_DATADIR_READ;
2133                         break;
2134                 case DMA_TO_DEVICE:
2135                         *data_dir = FSF_DATADIR_WRITE;
2136                         break;
2137                 case DMA_BIDIRECTIONAL:
2138                         return -EINVAL;
2139                 }
2140                 break;
2141
2142         case SCSI_PROT_READ_STRIP:
2143                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2144                 break;
2145         case SCSI_PROT_WRITE_INSERT:
2146                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2147                 break;
2148         case SCSI_PROT_READ_PASS:
2149                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2150                 break;
2151         case SCSI_PROT_WRITE_PASS:
2152                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2153                 break;
2154         default:
2155                 return -EINVAL;
2156         }
2157
2158         return 0;
2159 }
2160
2161 /**
2162  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2163  * @scsi_cmnd: scsi command to be sent
2164  */
2165 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2166 {
2167         struct zfcp_fsf_req *req;
2168         struct fcp_cmnd *fcp_cmnd;
2169         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2170         int real_bytes, retval = -EIO, dix_bytes = 0;
2171         struct scsi_device *sdev = scsi_cmnd->device;
2172         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2173         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2174         struct zfcp_qdio *qdio = adapter->qdio;
2175         struct fsf_qtcb_bottom_io *io;
2176
2177         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2178                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2179                 return -EBUSY;
2180
2181         spin_lock(&qdio->req_q_lock);
2182         if (atomic_read(&qdio->req_q_free) <= 0) {
2183                 atomic_inc(&qdio->req_q_full);
2184                 goto out;
2185         }
2186
2187         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2188                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2189
2190         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2191                                   sbtype, adapter->pool.scsi_req);
2192
2193         if (IS_ERR(req)) {
2194                 retval = PTR_ERR(req);
2195                 goto out;
2196         }
2197
2198         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2199
2200         io = &req->qtcb->bottom.io;
2201         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2202         req->data = scsi_cmnd;
2203         req->handler = zfcp_fsf_fcp_cmnd_handler;
2204         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2205         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2206         io->service_class = FSF_CLASS_3;
2207         io->fcp_cmnd_length = FCP_CMND_LEN;
2208
2209         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2210                 io->data_block_length = scsi_cmnd->device->sector_size;
2211                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2212         }
2213
2214         zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction);
2215
2216         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2217         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2218
2219         if (scsi_prot_sg_count(scsi_cmnd)) {
2220                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2221                                        scsi_prot_sg_count(scsi_cmnd));
2222                 dix_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2223                                                 scsi_prot_sglist(scsi_cmnd));
2224                 io->prot_data_length = dix_bytes;
2225         }
2226
2227         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2228                                              scsi_sglist(scsi_cmnd));
2229
2230         if (unlikely(real_bytes < 0) || unlikely(dix_bytes < 0))
2231                 goto failed_scsi_cmnd;
2232
2233         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2234
2235         retval = zfcp_fsf_req_send(req);
2236         if (unlikely(retval))
2237                 goto failed_scsi_cmnd;
2238
2239         goto out;
2240
2241 failed_scsi_cmnd:
2242         zfcp_fsf_req_free(req);
2243         scsi_cmnd->host_scribble = NULL;
2244 out:
2245         spin_unlock(&qdio->req_q_lock);
2246         return retval;
2247 }
2248
2249 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2250 {
2251         struct fcp_resp_with_ext *fcp_rsp;
2252         struct fcp_resp_rsp_info *rsp_info;
2253
2254         zfcp_fsf_fcp_handler_common(req);
2255
2256         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2257         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2258
2259         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2260              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2261                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2262 }
2263
2264 /**
2265  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2266  * @scmnd: SCSI command to send the task management command for
2267  * @tm_flags: unsigned byte for task management flags
2268  * Returns: on success pointer to struct fsf_req, NULL otherwise
2269  */
2270 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2271                                             u8 tm_flags)
2272 {
2273         struct zfcp_fsf_req *req = NULL;
2274         struct fcp_cmnd *fcp_cmnd;
2275         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2276         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2277
2278         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2279                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2280                 return NULL;
2281
2282         spin_lock_irq(&qdio->req_q_lock);
2283         if (zfcp_qdio_sbal_get(qdio))
2284                 goto out;
2285
2286         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2287                                   SBAL_FLAGS0_TYPE_WRITE,
2288                                   qdio->adapter->pool.scsi_req);
2289
2290         if (IS_ERR(req)) {
2291                 req = NULL;
2292                 goto out;
2293         }
2294
2295         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2296         req->data = scmnd;
2297         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2298         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2299         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2300         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2301         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2302         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2303
2304         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2305
2306         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2307         zfcp_fc_fcp_tm(fcp_cmnd, scmnd->device, tm_flags);
2308
2309         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2310         if (!zfcp_fsf_req_send(req))
2311                 goto out;
2312
2313         zfcp_fsf_req_free(req);
2314         req = NULL;
2315 out:
2316         spin_unlock_irq(&qdio->req_q_lock);
2317         return req;
2318 }
2319
2320 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2321 {
2322 }
2323
2324 /**
2325  * zfcp_fsf_control_file - control file upload/download
2326  * @adapter: pointer to struct zfcp_adapter
2327  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2328  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2329  */
2330 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2331                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2332 {
2333         struct zfcp_qdio *qdio = adapter->qdio;
2334         struct zfcp_fsf_req *req = NULL;
2335         struct fsf_qtcb_bottom_support *bottom;
2336         int direction, retval = -EIO, bytes;
2337
2338         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2339                 return ERR_PTR(-EOPNOTSUPP);
2340
2341         switch (fsf_cfdc->command) {
2342         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2343                 direction = SBAL_FLAGS0_TYPE_WRITE;
2344                 break;
2345         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2346                 direction = SBAL_FLAGS0_TYPE_READ;
2347                 break;
2348         default:
2349                 return ERR_PTR(-EINVAL);
2350         }
2351
2352         spin_lock_irq(&qdio->req_q_lock);
2353         if (zfcp_qdio_sbal_get(qdio))
2354                 goto out;
2355
2356         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2357         if (IS_ERR(req)) {
2358                 retval = -EPERM;
2359                 goto out;
2360         }
2361
2362         req->handler = zfcp_fsf_control_file_handler;
2363
2364         bottom = &req->qtcb->bottom.support;
2365         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2366         bottom->option = fsf_cfdc->option;
2367
2368         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2369
2370         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2371                 zfcp_fsf_req_free(req);
2372                 goto out;
2373         }
2374         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2375
2376         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2377         retval = zfcp_fsf_req_send(req);
2378 out:
2379         spin_unlock_irq(&qdio->req_q_lock);
2380
2381         if (!retval) {
2382                 wait_for_completion(&req->completion);
2383                 return req;
2384         }
2385         return ERR_PTR(retval);
2386 }
2387
2388 /**
2389  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2390  * @adapter: pointer to struct zfcp_adapter
2391  * @sbal_idx: response queue index of SBAL to be processed
2392  */
2393 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2394 {
2395         struct zfcp_adapter *adapter = qdio->adapter;
2396         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2397         struct qdio_buffer_element *sbale;
2398         struct zfcp_fsf_req *fsf_req;
2399         unsigned long req_id;
2400         int idx;
2401
2402         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2403
2404                 sbale = &sbal->element[idx];
2405                 req_id = (unsigned long) sbale->addr;
2406                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2407
2408                 if (!fsf_req) {
2409                         /*
2410                          * Unknown request means that we have potentially memory
2411                          * corruption and must stop the machine immediately.
2412                          */
2413                         zfcp_qdio_siosl(adapter);
2414                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2415                               req_id, dev_name(&adapter->ccw_device->dev));
2416                 }
2417
2418                 fsf_req->qdio_req.sbal_response = sbal_idx;
2419                 zfcp_fsf_req_complete(fsf_req);
2420
2421                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2422                         break;
2423         }
2424 }