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                 zfcp_fsf_link_down_info_eval(req,
 536                         &qtcb->header.fsf_status_qual.link_down_info);
 537                 break;
 538         default:
 539                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
 540                 return;
 541         }
 542
 543         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 544                 adapter->hardware_version = bottom->hardware_version;
 545                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 546                        min(FC_SERIAL_NUMBER_SIZE, 17));
 547                 EBCASC(fc_host_serial_number(shost),
 548                        min(FC_SERIAL_NUMBER_SIZE, 17));
 549         }
 550
 551         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 552                 dev_err(&adapter->ccw_device->dev,
 553                         "The FCP adapter only supports newer "
 554                         "control block versions\n");
 555                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
 556                 return;
 557         }
 558         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 559                 dev_err(&adapter->ccw_device->dev,
 560                         "The FCP adapter only supports older "
 561                         "control block versions\n");
 562                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
 563         }
 564 }
 565
 566 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 567 {
 568         struct zfcp_adapter *adapter = req->adapter;
 569         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 570         struct Scsi_Host *shost = adapter->scsi_host;
 571
 572         if (req->data)
 573                 memcpy(req->data, bottom, sizeof(*bottom));
 574
 575         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 576                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 577                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 578         } else
 579                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 580         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 581         fc_host_supported_speeds(shost) = bottom->supported_speed;
 582         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 583                FC_FC4_LIST_SIZE);
 584         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 585                FC_FC4_LIST_SIZE);
 586 }
 587
 588 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 589 {
 590         struct fsf_qtcb *qtcb = req->qtcb;
 591
 592         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 593                 return;
 594
 595         switch (qtcb->header.fsf_status) {
 596         case FSF_GOOD:
 597                 zfcp_fsf_exchange_port_evaluate(req);
 598                 break;
 599         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 600                 zfcp_fsf_exchange_port_evaluate(req);
 601                 zfcp_fsf_link_down_info_eval(req,
 602                         &qtcb->header.fsf_status_qual.link_down_info);
 603                 break;
 604         }
 605 }
 606
 607 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 608 {
 609         struct zfcp_fsf_req *req;
 610
 611         if (likely(pool))
 612                 req = mempool_alloc(pool, GFP_ATOMIC);
 613         else
 614                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 615
 616         if (unlikely(!req))
 617                 return NULL;
 618
 619         memset(req, 0, sizeof(*req));
 620         req->pool = pool;
 621         return req;
 622 }
 623
 624 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 625 {
 626         struct fsf_qtcb *qtcb;
 627
 628         if (likely(pool))
 629                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 630         else
 631                 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
 632
 633         if (unlikely(!qtcb))
 634                 return NULL;
 635
 636         memset(qtcb, 0, sizeof(*qtcb));
 637         return qtcb;
 638 }
 639
 640 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 641                                                 u32 fsf_cmd, u32 sbtype,
 642                                                 mempool_t *pool)
 643 {
 644         struct zfcp_adapter *adapter = qdio->adapter;
 645         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 646
 647         if (unlikely(!req))
 648                 return ERR_PTR(-ENOMEM);
 649
 650         if (adapter->req_no == 0)
 651                 adapter->req_no++;
 652
 653         INIT_LIST_HEAD(&req->list);
 654         init_timer(&req->timer);
 655         init_completion(&req->completion);
 656
 657         req->adapter = adapter;
 658         req->fsf_command = fsf_cmd;
 659         req->req_id = adapter->req_no;
 660
 661         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 662                 if (likely(pool))
 663                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 664                 else
 665                         req->qtcb = zfcp_qtcb_alloc(NULL);
 666
 667                 if (unlikely(!req->qtcb)) {
 668                         zfcp_fsf_req_free(req);
 669                         return ERR_PTR(-ENOMEM);
 670                 }
 671
 672                 req->seq_no = adapter->fsf_req_seq_no;
 673                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 674                 req->qtcb->prefix.req_id = req->req_id;
 675                 req->qtcb->prefix.ulp_info = 26;
 676                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 677                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 678                 req->qtcb->header.req_handle = req->req_id;
 679                 req->qtcb->header.fsf_command = req->fsf_command;
 680         }
 681
 682         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 683                            req->qtcb, sizeof(struct fsf_qtcb));
 684
 685         return req;
 686 }
 687
 688 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 689 {
 690         struct zfcp_adapter *adapter = req->adapter;
 691         struct zfcp_qdio *qdio = adapter->qdio;
 692         int with_qtcb = (req->qtcb != NULL);
 693         int req_id = req->req_id;
 694
 695         zfcp_reqlist_add(adapter->req_list, req);
 696
 697         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 698         req->issued = get_clock();
 699         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 700                 del_timer(&req->timer);
 701                 /* lookup request again, list might have changed */
 702                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 703                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
 704                 return -EIO;
 705         }
 706
 707         /* Don't increase for unsolicited status */
 708         if (with_qtcb)
 709                 adapter->fsf_req_seq_no++;
 710         adapter->req_no++;
 711
 712         return 0;
 713 }
 714
 715 /**
 716  * zfcp_fsf_status_read - send status read request
 717  * @adapter: pointer to struct zfcp_adapter
 718  * @req_flags: request flags
 719  * Returns: 0 on success, ERROR otherwise
 720  */
 721 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 722 {
 723         struct zfcp_adapter *adapter = qdio->adapter;
 724         struct zfcp_fsf_req *req;
 725         struct fsf_status_read_buffer *sr_buf;
 726         int retval = -EIO;
 727
 728         spin_lock_irq(&qdio->req_q_lock);
 729         if (zfcp_qdio_sbal_get(qdio))
 730                 goto out;
 731
 732         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
 733                                   adapter->pool.status_read_req);
 734         if (IS_ERR(req)) {
 735                 retval = PTR_ERR(req);
 736                 goto out;
 737         }
 738
 739         sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 740         if (!sr_buf) {
 741                 retval = -ENOMEM;
 742                 goto failed_buf;
 743         }
 744         memset(sr_buf, 0, sizeof(*sr_buf));
 745         req->data = sr_buf;
 746
 747         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 748         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 749
 750         retval = zfcp_fsf_req_send(req);
 751         if (retval)
 752                 goto failed_req_send;
 753
 754         goto out;
 755
 756 failed_req_send:
 757         mempool_free(sr_buf, adapter->pool.status_read_data);
 758 failed_buf:
 759         zfcp_fsf_req_free(req);
 760         zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
 761 out:
 762         spin_unlock_irq(&qdio->req_q_lock);
 763         return retval;
 764 }
 765
 766 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 767 {
 768         struct scsi_device *sdev = req->data;
 769         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 770         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 771
 772         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 773                 return;
 774
 775         switch (req->qtcb->header.fsf_status) {
 776         case FSF_PORT_HANDLE_NOT_VALID:
 777                 if (fsq->word[0] == fsq->word[1]) {
 778                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 779                                                 "fsafch1", req);
 780                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 781                 }
 782                 break;
 783         case FSF_LUN_HANDLE_NOT_VALID:
 784                 if (fsq->word[0] == fsq->word[1]) {
 785                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2",
 786                                              req);
 787                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 788                 }
 789                 break;
 790         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 791                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 792                 break;
 793         case FSF_PORT_BOXED:
 794                 zfcp_erp_set_port_status(zfcp_sdev->port,
 795                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 796                 zfcp_erp_port_reopen(zfcp_sdev->port,
 797                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3",
 798                                      req);
 799                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 800                 break;
 801         case FSF_LUN_BOXED:
 802                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 803                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 804                                     "fsafch4", req);
 805                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 806                 break;
 807         case FSF_ADAPTER_STATUS_AVAILABLE:
 808                 switch (fsq->word[0]) {
 809                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 810                         zfcp_fc_test_link(zfcp_sdev->port);
 811                         /* fall through */
 812                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 813                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 814                         break;
 815                 }
 816                 break;
 817         case FSF_GOOD:
 818                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 819                 break;
 820         }
 821 }
 822
 823 /**
 824  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 825  * @scmnd: The SCSI command to abort
 826  * Returns: pointer to struct zfcp_fsf_req
 827  */
 828
 829 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 830 {
 831         struct zfcp_fsf_req *req = NULL;
 832         struct scsi_device *sdev = scmnd->device;
 833         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 834         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 835         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 836
 837         spin_lock_irq(&qdio->req_q_lock);
 838         if (zfcp_qdio_sbal_get(qdio))
 839                 goto out;
 840         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 841                                   SBAL_FLAGS0_TYPE_READ,
 842                                   qdio->adapter->pool.scsi_abort);
 843         if (IS_ERR(req)) {
 844                 req = NULL;
 845                 goto out;
 846         }
 847
 848         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 849                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 850                 goto out_error_free;
 851
 852         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 853
 854         req->data = sdev;
 855         req->handler = zfcp_fsf_abort_fcp_command_handler;
 856         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 857         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 858         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 859
 860         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 861         if (!zfcp_fsf_req_send(req))
 862                 goto out;
 863
 864 out_error_free:
 865         zfcp_fsf_req_free(req);
 866         req = NULL;
 867 out:
 868         spin_unlock_irq(&qdio->req_q_lock);
 869         return req;
 870 }
 871
 872 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 873 {
 874         struct zfcp_adapter *adapter = req->adapter;
 875         struct zfcp_fsf_ct_els *ct = req->data;
 876         struct fsf_qtcb_header *header = &req->qtcb->header;
 877
 878         ct->status = -EINVAL;
 879
 880         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 881                 goto skip_fsfstatus;
 882
 883         switch (header->fsf_status) {
 884         case FSF_GOOD:
 885                 zfcp_dbf_san_res("fsscth1", req);
 886                 ct->status = 0;
 887                 break;
 888         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 889                 zfcp_fsf_class_not_supp(req);
 890                 break;
 891         case FSF_ADAPTER_STATUS_AVAILABLE:
 892                 switch (header->fsf_status_qual.word[0]){
 893                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 894                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 895                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 896                         break;
 897                 }
 898                 break;
 899         case FSF_ACCESS_DENIED:
 900                 break;
 901         case FSF_PORT_BOXED:
 902                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 903                 break;
 904         case FSF_PORT_HANDLE_NOT_VALID:
 905                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
 906                 /* fall through */
 907         case FSF_GENERIC_COMMAND_REJECTED:
 908         case FSF_PAYLOAD_SIZE_MISMATCH:
 909         case FSF_REQUEST_SIZE_TOO_LARGE:
 910         case FSF_RESPONSE_SIZE_TOO_LARGE:
 911         case FSF_SBAL_MISMATCH:
 912                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 913                 break;
 914         }
 915
 916 skip_fsfstatus:
 917         if (ct->handler)
 918                 ct->handler(ct->handler_data);
 919 }
 920
 921 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 922                                             struct zfcp_qdio_req *q_req,
 923                                             struct scatterlist *sg_req,
 924                                             struct scatterlist *sg_resp)
 925 {
 926         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 927         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 928         zfcp_qdio_set_sbale_last(qdio, q_req);
 929 }
 930
 931 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 932                                        struct scatterlist *sg_req,
 933                                        struct scatterlist *sg_resp)
 934 {
 935         struct zfcp_adapter *adapter = req->adapter;
 936         u32 feat = adapter->adapter_features;
 937         int bytes;
 938
 939         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
 940                 if (!zfcp_qdio_sg_one_sbale(sg_req) ||
 941                     !zfcp_qdio_sg_one_sbale(sg_resp))
 942                         return -EOPNOTSUPP;
 943
 944                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 945                                                 sg_req, sg_resp);
 946                 return 0;
 947         }
 948
 949         /* use single, unchained SBAL if it can hold the request */
 950         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 951                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 952                                                 sg_req, sg_resp);
 953                 return 0;
 954         }
 955
 956         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, sg_req);
 957         if (bytes <= 0)
 958                 return -EIO;
 959         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 960         req->qtcb->bottom.support.req_buf_length = bytes;
 961         zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
 962
 963         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
 964                                         sg_resp);
 965         req->qtcb->bottom.support.resp_buf_length = bytes;
 966         if (bytes <= 0)
 967                 return -EIO;
 968         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 969
 970         return 0;
 971 }
 972
 973 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
 974                                  struct scatterlist *sg_req,
 975                                  struct scatterlist *sg_resp,
 976                                  unsigned int timeout)
 977 {
 978         int ret;
 979
 980         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
 981         if (ret)
 982                 return ret;
 983
 984         /* common settings for ct/gs and els requests */
 985         if (timeout > 255)
 986                 timeout = 255; /* max value accepted by hardware */
 987         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
 988         req->qtcb->bottom.support.timeout = timeout;
 989         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
 990
 991         return 0;
 992 }
 993
 994 /**
 995  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
 996  * @ct: pointer to struct zfcp_send_ct with data for request
 997  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
 998  */
 999 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1000                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1001                      unsigned int timeout)
1002 {
1003         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1004         struct zfcp_fsf_req *req;
1005         int ret = -EIO;
1006
1007         spin_lock_irq(&qdio->req_q_lock);
1008         if (zfcp_qdio_sbal_get(qdio))
1009                 goto out;
1010
1011         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1012                                   SBAL_FLAGS0_TYPE_WRITE_READ, pool);
1013
1014         if (IS_ERR(req)) {
1015                 ret = PTR_ERR(req);
1016                 goto out;
1017         }
1018
1019         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1020         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1021         if (ret)
1022                 goto failed_send;
1023
1024         req->handler = zfcp_fsf_send_ct_handler;
1025         req->qtcb->header.port_handle = wka_port->handle;
1026         req->data = ct;
1027
1028         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1029
1030         ret = zfcp_fsf_req_send(req);
1031         if (ret)
1032                 goto failed_send;
1033
1034         goto out;
1035
1036 failed_send:
1037         zfcp_fsf_req_free(req);
1038 out:
1039         spin_unlock_irq(&qdio->req_q_lock);
1040         return ret;
1041 }
1042
1043 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1044 {
1045         struct zfcp_fsf_ct_els *send_els = req->data;
1046         struct zfcp_port *port = send_els->port;
1047         struct fsf_qtcb_header *header = &req->qtcb->header;
1048
1049         send_els->status = -EINVAL;
1050
1051         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1052                 goto skip_fsfstatus;
1053
1054         switch (header->fsf_status) {
1055         case FSF_GOOD:
1056                 zfcp_dbf_san_res("fsselh1", req);
1057                 send_els->status = 0;
1058                 break;
1059         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1060                 zfcp_fsf_class_not_supp(req);
1061                 break;
1062         case FSF_ADAPTER_STATUS_AVAILABLE:
1063                 switch (header->fsf_status_qual.word[0]){
1064                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1065                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1066                 case FSF_SQ_RETRY_IF_POSSIBLE:
1067                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1068                         break;
1069                 }
1070                 break;
1071         case FSF_ELS_COMMAND_REJECTED:
1072         case FSF_PAYLOAD_SIZE_MISMATCH:
1073         case FSF_REQUEST_SIZE_TOO_LARGE:
1074         case FSF_RESPONSE_SIZE_TOO_LARGE:
1075                 break;
1076         case FSF_ACCESS_DENIED:
1077                 if (port) {
1078                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1079                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1080                 }
1081                 break;
1082         case FSF_SBAL_MISMATCH:
1083                 /* should never occure, avoided in zfcp_fsf_send_els */
1084                 /* fall through */
1085         default:
1086                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1087                 break;
1088         }
1089 skip_fsfstatus:
1090         if (send_els->handler)
1091                 send_els->handler(send_els->handler_data);
1092 }
1093
1094 /**
1095  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1096  * @els: pointer to struct zfcp_send_els with data for the command
1097  */
1098 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1099                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1100 {
1101         struct zfcp_fsf_req *req;
1102         struct zfcp_qdio *qdio = adapter->qdio;
1103         int ret = -EIO;
1104
1105         spin_lock_irq(&qdio->req_q_lock);
1106         if (zfcp_qdio_sbal_get(qdio))
1107                 goto out;
1108
1109         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1110                                   SBAL_FLAGS0_TYPE_WRITE_READ, NULL);
1111
1112         if (IS_ERR(req)) {
1113                 ret = PTR_ERR(req);
1114                 goto out;
1115         }
1116
1117         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1118
1119         zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1120
1121         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1122
1123         if (ret)
1124                 goto failed_send;
1125
1126         hton24(req->qtcb->bottom.support.d_id, d_id);
1127         req->handler = zfcp_fsf_send_els_handler;
1128         req->data = els;
1129
1130         zfcp_dbf_san_req("fssels1", req, d_id);
1131
1132         ret = zfcp_fsf_req_send(req);
1133         if (ret)
1134                 goto failed_send;
1135
1136         goto out;
1137
1138 failed_send:
1139         zfcp_fsf_req_free(req);
1140 out:
1141         spin_unlock_irq(&qdio->req_q_lock);
1142         return ret;
1143 }
1144
1145 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1146 {
1147         struct zfcp_fsf_req *req;
1148         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1149         int retval = -EIO;
1150
1151         spin_lock_irq(&qdio->req_q_lock);
1152         if (zfcp_qdio_sbal_get(qdio))
1153                 goto out;
1154
1155         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1156                                   SBAL_FLAGS0_TYPE_READ,
1157                                   qdio->adapter->pool.erp_req);
1158
1159         if (IS_ERR(req)) {
1160                 retval = PTR_ERR(req);
1161                 goto out;
1162         }
1163
1164         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1165         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1166
1167         req->qtcb->bottom.config.feature_selection =
1168                         FSF_FEATURE_CFDC |
1169                         FSF_FEATURE_LUN_SHARING |
1170                         FSF_FEATURE_NOTIFICATION_LOST |
1171                         FSF_FEATURE_UPDATE_ALERT;
1172         req->erp_action = erp_action;
1173         req->handler = zfcp_fsf_exchange_config_data_handler;
1174         erp_action->fsf_req_id = req->req_id;
1175
1176         zfcp_fsf_start_erp_timer(req);
1177         retval = zfcp_fsf_req_send(req);
1178         if (retval) {
1179                 zfcp_fsf_req_free(req);
1180                 erp_action->fsf_req_id = 0;
1181         }
1182 out:
1183         spin_unlock_irq(&qdio->req_q_lock);
1184         return retval;
1185 }
1186
1187 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1188                                        struct fsf_qtcb_bottom_config *data)
1189 {
1190         struct zfcp_fsf_req *req = NULL;
1191         int retval = -EIO;
1192
1193         spin_lock_irq(&qdio->req_q_lock);
1194         if (zfcp_qdio_sbal_get(qdio))
1195                 goto out_unlock;
1196
1197         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1198                                   SBAL_FLAGS0_TYPE_READ, NULL);
1199
1200         if (IS_ERR(req)) {
1201                 retval = PTR_ERR(req);
1202                 goto out_unlock;
1203         }
1204
1205         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1206         req->handler = zfcp_fsf_exchange_config_data_handler;
1207
1208         req->qtcb->bottom.config.feature_selection =
1209                         FSF_FEATURE_CFDC |
1210                         FSF_FEATURE_LUN_SHARING |
1211                         FSF_FEATURE_NOTIFICATION_LOST |
1212                         FSF_FEATURE_UPDATE_ALERT;
1213
1214         if (data)
1215                 req->data = data;
1216
1217         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1218         retval = zfcp_fsf_req_send(req);
1219         spin_unlock_irq(&qdio->req_q_lock);
1220         if (!retval)
1221                 wait_for_completion(&req->completion);
1222
1223         zfcp_fsf_req_free(req);
1224         return retval;
1225
1226 out_unlock:
1227         spin_unlock_irq(&qdio->req_q_lock);
1228         return retval;
1229 }
1230
1231 /**
1232  * zfcp_fsf_exchange_port_data - request information about local port
1233  * @erp_action: ERP action for the adapter for which port data is requested
1234  * Returns: 0 on success, error otherwise
1235  */
1236 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1237 {
1238         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1239         struct zfcp_fsf_req *req;
1240         int retval = -EIO;
1241
1242         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1243                 return -EOPNOTSUPP;
1244
1245         spin_lock_irq(&qdio->req_q_lock);
1246         if (zfcp_qdio_sbal_get(qdio))
1247                 goto out;
1248
1249         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1250                                   SBAL_FLAGS0_TYPE_READ,
1251                                   qdio->adapter->pool.erp_req);
1252
1253         if (IS_ERR(req)) {
1254                 retval = PTR_ERR(req);
1255                 goto out;
1256         }
1257
1258         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1259         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1260
1261         req->handler = zfcp_fsf_exchange_port_data_handler;
1262         req->erp_action = erp_action;
1263         erp_action->fsf_req_id = req->req_id;
1264
1265         zfcp_fsf_start_erp_timer(req);
1266         retval = zfcp_fsf_req_send(req);
1267         if (retval) {
1268                 zfcp_fsf_req_free(req);
1269                 erp_action->fsf_req_id = 0;
1270         }
1271 out:
1272         spin_unlock_irq(&qdio->req_q_lock);
1273         return retval;
1274 }
1275
1276 /**
1277  * zfcp_fsf_exchange_port_data_sync - request information about local port
1278  * @qdio: pointer to struct zfcp_qdio
1279  * @data: pointer to struct fsf_qtcb_bottom_port
1280  * Returns: 0 on success, error otherwise
1281  */
1282 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1283                                      struct fsf_qtcb_bottom_port *data)
1284 {
1285         struct zfcp_fsf_req *req = NULL;
1286         int retval = -EIO;
1287
1288         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1289                 return -EOPNOTSUPP;
1290
1291         spin_lock_irq(&qdio->req_q_lock);
1292         if (zfcp_qdio_sbal_get(qdio))
1293                 goto out_unlock;
1294
1295         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1296                                   SBAL_FLAGS0_TYPE_READ, NULL);
1297
1298         if (IS_ERR(req)) {
1299                 retval = PTR_ERR(req);
1300                 goto out_unlock;
1301         }
1302
1303         if (data)
1304                 req->data = data;
1305
1306         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1307
1308         req->handler = zfcp_fsf_exchange_port_data_handler;
1309         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1310         retval = zfcp_fsf_req_send(req);
1311         spin_unlock_irq(&qdio->req_q_lock);
1312
1313         if (!retval)
1314                 wait_for_completion(&req->completion);
1315
1316         zfcp_fsf_req_free(req);
1317
1318         return retval;
1319
1320 out_unlock:
1321         spin_unlock_irq(&qdio->req_q_lock);
1322         return retval;
1323 }
1324
1325 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1326 {
1327         struct zfcp_port *port = req->data;
1328         struct fsf_qtcb_header *header = &req->qtcb->header;
1329         struct fc_els_flogi *plogi;
1330
1331         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1332                 goto out;
1333
1334         switch (header->fsf_status) {
1335         case FSF_PORT_ALREADY_OPEN:
1336                 break;
1337         case FSF_ACCESS_DENIED:
1338                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1339                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1340                 break;
1341         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1342                 dev_warn(&req->adapter->ccw_device->dev,
1343                          "Not enough FCP adapter resources to open "
1344                          "remote port 0x%016Lx\n",
1345                          (unsigned long long)port->wwpn);
1346                 zfcp_erp_set_port_status(port,
1347                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1348                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1349                 break;
1350         case FSF_ADAPTER_STATUS_AVAILABLE:
1351                 switch (header->fsf_status_qual.word[0]) {
1352                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1353                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1354                 case FSF_SQ_NO_RETRY_POSSIBLE:
1355                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1356                         break;
1357                 }
1358                 break;
1359         case FSF_GOOD:
1360                 port->handle = header->port_handle;
1361                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1362                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1363                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1364                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1365                                   &port->status);
1366                 /* check whether D_ID has changed during open */
1367                 /*
1368                  * FIXME: This check is not airtight, as the FCP channel does
1369                  * not monitor closures of target port connections caused on
1370                  * the remote side. Thus, they might miss out on invalidating
1371                  * locally cached WWPNs (and other N_Port parameters) of gone
1372                  * target ports. So, our heroic attempt to make things safe
1373                  * could be undermined by 'open port' response data tagged with
1374                  * obsolete WWPNs. Another reason to monitor potential
1375                  * connection closures ourself at least (by interpreting
1376                  * incoming ELS' and unsolicited status). It just crosses my
1377                  * mind that one should be able to cross-check by means of
1378                  * another GID_PN straight after a port has been opened.
1379                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1380                  */
1381                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1382                 if (req->qtcb->bottom.support.els1_length >=
1383                     FSF_PLOGI_MIN_LEN)
1384                                 zfcp_fc_plogi_evaluate(port, plogi);
1385                 break;
1386         case FSF_UNKNOWN_OP_SUBTYPE:
1387                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1388                 break;
1389         }
1390
1391 out:
1392         put_device(&port->dev);
1393 }
1394
1395 /**
1396  * zfcp_fsf_open_port - create and send open port request
1397  * @erp_action: pointer to struct zfcp_erp_action
1398  * Returns: 0 on success, error otherwise
1399  */
1400 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1401 {
1402         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1403         struct zfcp_port *port = erp_action->port;
1404         struct zfcp_fsf_req *req;
1405         int retval = -EIO;
1406
1407         spin_lock_irq(&qdio->req_q_lock);
1408         if (zfcp_qdio_sbal_get(qdio))
1409                 goto out;
1410
1411         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1412                                   SBAL_FLAGS0_TYPE_READ,
1413                                   qdio->adapter->pool.erp_req);
1414
1415         if (IS_ERR(req)) {
1416                 retval = PTR_ERR(req);
1417                 goto out;
1418         }
1419
1420         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1421         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1422
1423         req->handler = zfcp_fsf_open_port_handler;
1424         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1425         req->data = port;
1426         req->erp_action = erp_action;
1427         erp_action->fsf_req_id = req->req_id;
1428         get_device(&port->dev);
1429
1430         zfcp_fsf_start_erp_timer(req);
1431         retval = zfcp_fsf_req_send(req);
1432         if (retval) {
1433                 zfcp_fsf_req_free(req);
1434                 erp_action->fsf_req_id = 0;
1435                 put_device(&port->dev);
1436         }
1437 out:
1438         spin_unlock_irq(&qdio->req_q_lock);
1439         return retval;
1440 }
1441
1442 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1443 {
1444         struct zfcp_port *port = req->data;
1445
1446         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1447                 return;
1448
1449         switch (req->qtcb->header.fsf_status) {
1450         case FSF_PORT_HANDLE_NOT_VALID:
1451                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1452                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1453                 break;
1454         case FSF_ADAPTER_STATUS_AVAILABLE:
1455                 break;
1456         case FSF_GOOD:
1457                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1458                 break;
1459         }
1460 }
1461
1462 /**
1463  * zfcp_fsf_close_port - create and send close port request
1464  * @erp_action: pointer to struct zfcp_erp_action
1465  * Returns: 0 on success, error otherwise
1466  */
1467 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1468 {
1469         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1470         struct zfcp_fsf_req *req;
1471         int retval = -EIO;
1472
1473         spin_lock_irq(&qdio->req_q_lock);
1474         if (zfcp_qdio_sbal_get(qdio))
1475                 goto out;
1476
1477         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1478                                   SBAL_FLAGS0_TYPE_READ,
1479                                   qdio->adapter->pool.erp_req);
1480
1481         if (IS_ERR(req)) {
1482                 retval = PTR_ERR(req);
1483                 goto out;
1484         }
1485
1486         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1487         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1488
1489         req->handler = zfcp_fsf_close_port_handler;
1490         req->data = erp_action->port;
1491         req->erp_action = erp_action;
1492         req->qtcb->header.port_handle = erp_action->port->handle;
1493         erp_action->fsf_req_id = req->req_id;
1494
1495         zfcp_fsf_start_erp_timer(req);
1496         retval = zfcp_fsf_req_send(req);
1497         if (retval) {
1498                 zfcp_fsf_req_free(req);
1499                 erp_action->fsf_req_id = 0;
1500         }
1501 out:
1502         spin_unlock_irq(&qdio->req_q_lock);
1503         return retval;
1504 }
1505
1506 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1507 {
1508         struct zfcp_fc_wka_port *wka_port = req->data;
1509         struct fsf_qtcb_header *header = &req->qtcb->header;
1510
1511         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1512                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1513                 goto out;
1514         }
1515
1516         switch (header->fsf_status) {
1517         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1518                 dev_warn(&req->adapter->ccw_device->dev,
1519                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1520                 /* fall through */
1521         case FSF_ADAPTER_STATUS_AVAILABLE:
1522                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1523                 /* fall through */
1524         case FSF_ACCESS_DENIED:
1525                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1526                 break;
1527         case FSF_GOOD:
1528                 wka_port->handle = header->port_handle;
1529                 /* fall through */
1530         case FSF_PORT_ALREADY_OPEN:
1531                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1532         }
1533 out:
1534         wake_up(&wka_port->completion_wq);
1535 }
1536
1537 /**
1538  * zfcp_fsf_open_wka_port - create and send open wka-port request
1539  * @wka_port: pointer to struct zfcp_fc_wka_port
1540  * Returns: 0 on success, error otherwise
1541  */
1542 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1543 {
1544         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1545         struct zfcp_fsf_req *req;
1546         int retval = -EIO;
1547
1548         spin_lock_irq(&qdio->req_q_lock);
1549         if (zfcp_qdio_sbal_get(qdio))
1550                 goto out;
1551
1552         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1553                                   SBAL_FLAGS0_TYPE_READ,
1554                                   qdio->adapter->pool.erp_req);
1555
1556         if (unlikely(IS_ERR(req))) {
1557                 retval = PTR_ERR(req);
1558                 goto out;
1559         }
1560
1561         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1562         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1563
1564         req->handler = zfcp_fsf_open_wka_port_handler;
1565         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1566         req->data = wka_port;
1567
1568         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1569         retval = zfcp_fsf_req_send(req);
1570         if (retval)
1571                 zfcp_fsf_req_free(req);
1572 out:
1573         spin_unlock_irq(&qdio->req_q_lock);
1574         return retval;
1575 }
1576
1577 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1578 {
1579         struct zfcp_fc_wka_port *wka_port = req->data;
1580
1581         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1582                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1583                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1584         }
1585
1586         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1587         wake_up(&wka_port->completion_wq);
1588 }
1589
1590 /**
1591  * zfcp_fsf_close_wka_port - create and send close wka port request
1592  * @wka_port: WKA port to open
1593  * Returns: 0 on success, error otherwise
1594  */
1595 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1596 {
1597         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1598         struct zfcp_fsf_req *req;
1599         int retval = -EIO;
1600
1601         spin_lock_irq(&qdio->req_q_lock);
1602         if (zfcp_qdio_sbal_get(qdio))
1603                 goto out;
1604
1605         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1606                                   SBAL_FLAGS0_TYPE_READ,
1607                                   qdio->adapter->pool.erp_req);
1608
1609         if (unlikely(IS_ERR(req))) {
1610                 retval = PTR_ERR(req);
1611                 goto out;
1612         }
1613
1614         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1615         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1616
1617         req->handler = zfcp_fsf_close_wka_port_handler;
1618         req->data = wka_port;
1619         req->qtcb->header.port_handle = wka_port->handle;
1620
1621         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1622         retval = zfcp_fsf_req_send(req);
1623         if (retval)
1624                 zfcp_fsf_req_free(req);
1625 out:
1626         spin_unlock_irq(&qdio->req_q_lock);
1627         return retval;
1628 }
1629
1630 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1631 {
1632         struct zfcp_port *port = req->data;
1633         struct fsf_qtcb_header *header = &req->qtcb->header;
1634         struct scsi_device *sdev;
1635
1636         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1637                 return;
1638
1639         switch (header->fsf_status) {
1640         case FSF_PORT_HANDLE_NOT_VALID:
1641                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1642                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1643                 break;
1644         case FSF_ACCESS_DENIED:
1645                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1646                 break;
1647         case FSF_PORT_BOXED:
1648                 /* can't use generic zfcp_erp_modify_port_status because
1649                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1650                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1651                 shost_for_each_device(sdev, port->adapter->scsi_host)
1652                         if (sdev_to_zfcp(sdev)->port == port)
1653                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1654                                                   &sdev_to_zfcp(sdev)->status);
1655                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1656                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1657                                      "fscpph2", req);
1658                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1659                 break;
1660         case FSF_ADAPTER_STATUS_AVAILABLE:
1661                 switch (header->fsf_status_qual.word[0]) {
1662                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1663                         /* fall through */
1664                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1665                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1666                         break;
1667                 }
1668                 break;
1669         case FSF_GOOD:
1670                 /* can't use generic zfcp_erp_modify_port_status because
1671                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1672                  */
1673                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1674                 shost_for_each_device(sdev, port->adapter->scsi_host)
1675                         if (sdev_to_zfcp(sdev)->port == port)
1676                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1677                                                   &sdev_to_zfcp(sdev)->status);
1678                 break;
1679         }
1680 }
1681
1682 /**
1683  * zfcp_fsf_close_physical_port - close physical port
1684  * @erp_action: pointer to struct zfcp_erp_action
1685  * Returns: 0 on success
1686  */
1687 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1688 {
1689         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1690         struct zfcp_fsf_req *req;
1691         int retval = -EIO;
1692
1693         spin_lock_irq(&qdio->req_q_lock);
1694         if (zfcp_qdio_sbal_get(qdio))
1695                 goto out;
1696
1697         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1698                                   SBAL_FLAGS0_TYPE_READ,
1699                                   qdio->adapter->pool.erp_req);
1700
1701         if (IS_ERR(req)) {
1702                 retval = PTR_ERR(req);
1703                 goto out;
1704         }
1705
1706         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1707         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1708
1709         req->data = erp_action->port;
1710         req->qtcb->header.port_handle = erp_action->port->handle;
1711         req->erp_action = erp_action;
1712         req->handler = zfcp_fsf_close_physical_port_handler;
1713         erp_action->fsf_req_id = req->req_id;
1714
1715         zfcp_fsf_start_erp_timer(req);
1716         retval = zfcp_fsf_req_send(req);
1717         if (retval) {
1718                 zfcp_fsf_req_free(req);
1719                 erp_action->fsf_req_id = 0;
1720         }
1721 out:
1722         spin_unlock_irq(&qdio->req_q_lock);
1723         return retval;
1724 }
1725
1726 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1727 {
1728         struct zfcp_adapter *adapter = req->adapter;
1729         struct scsi_device *sdev = req->data;
1730         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1731         struct fsf_qtcb_header *header = &req->qtcb->header;
1732         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1733
1734         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1735                 return;
1736
1737         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1738                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1739                           ZFCP_STATUS_LUN_SHARED |
1740                           ZFCP_STATUS_LUN_READONLY,
1741                           &zfcp_sdev->status);
1742
1743         switch (header->fsf_status) {
1744
1745         case FSF_PORT_HANDLE_NOT_VALID:
1746                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1", req);
1747                 /* fall through */
1748         case FSF_LUN_ALREADY_OPEN:
1749                 break;
1750         case FSF_ACCESS_DENIED:
1751                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1752                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1753                 break;
1754         case FSF_PORT_BOXED:
1755                 zfcp_erp_set_port_status(zfcp_sdev->port,
1756                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1757                 zfcp_erp_port_reopen(zfcp_sdev->port,
1758                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2",
1759                                      req);
1760                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1761                 break;
1762         case FSF_LUN_SHARING_VIOLATION:
1763                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1764                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1765                 break;
1766         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1767                 dev_warn(&adapter->ccw_device->dev,
1768                          "No handle is available for LUN "
1769                          "0x%016Lx on port 0x%016Lx\n",
1770                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1771                          (unsigned long long)zfcp_sdev->port->wwpn);
1772                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1773                 /* fall through */
1774         case FSF_INVALID_COMMAND_OPTION:
1775                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1776                 break;
1777         case FSF_ADAPTER_STATUS_AVAILABLE:
1778                 switch (header->fsf_status_qual.word[0]) {
1779                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1780                         zfcp_fc_test_link(zfcp_sdev->port);
1781                         /* fall through */
1782                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1783                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1784                         break;
1785                 }
1786                 break;
1787
1788         case FSF_GOOD:
1789                 zfcp_sdev->lun_handle = header->lun_handle;
1790                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1791                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1792                 break;
1793         }
1794 }
1795
1796 /**
1797  * zfcp_fsf_open_lun - open LUN
1798  * @erp_action: pointer to struct zfcp_erp_action
1799  * Returns: 0 on success, error otherwise
1800  */
1801 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1802 {
1803         struct zfcp_adapter *adapter = erp_action->adapter;
1804         struct zfcp_qdio *qdio = adapter->qdio;
1805         struct zfcp_fsf_req *req;
1806         int retval = -EIO;
1807
1808         spin_lock_irq(&qdio->req_q_lock);
1809         if (zfcp_qdio_sbal_get(qdio))
1810                 goto out;
1811
1812         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1813                                   SBAL_FLAGS0_TYPE_READ,
1814                                   adapter->pool.erp_req);
1815
1816         if (IS_ERR(req)) {
1817                 retval = PTR_ERR(req);
1818                 goto out;
1819         }
1820
1821         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1822         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1823
1824         req->qtcb->header.port_handle = erp_action->port->handle;
1825         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1826         req->handler = zfcp_fsf_open_lun_handler;
1827         req->data = erp_action->sdev;
1828         req->erp_action = erp_action;
1829         erp_action->fsf_req_id = req->req_id;
1830
1831         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1832                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1833
1834         zfcp_fsf_start_erp_timer(req);
1835         retval = zfcp_fsf_req_send(req);
1836         if (retval) {
1837                 zfcp_fsf_req_free(req);
1838                 erp_action->fsf_req_id = 0;
1839         }
1840 out:
1841         spin_unlock_irq(&qdio->req_q_lock);
1842         return retval;
1843 }
1844
1845 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1846 {
1847         struct scsi_device *sdev = req->data;
1848         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1849
1850         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1851                 return;
1852
1853         switch (req->qtcb->header.fsf_status) {
1854         case FSF_PORT_HANDLE_NOT_VALID:
1855                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1",
1856                                         req);
1857                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1858                 break;
1859         case FSF_LUN_HANDLE_NOT_VALID:
1860                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2", req);
1861                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1862                 break;
1863         case FSF_PORT_BOXED:
1864                 zfcp_erp_set_port_status(zfcp_sdev->port,
1865                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1866                 zfcp_erp_port_reopen(zfcp_sdev->port,
1867                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3",
1868                                      req);
1869                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1870                 break;
1871         case FSF_ADAPTER_STATUS_AVAILABLE:
1872                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1873                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1874                         zfcp_fc_test_link(zfcp_sdev->port);
1875                         /* fall through */
1876                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1877                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1878                         break;
1879                 }
1880                 break;
1881         case FSF_GOOD:
1882                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1883                 break;
1884         }
1885 }
1886
1887 /**
1888  * zfcp_fsf_close_LUN - close LUN
1889  * @erp_action: pointer to erp_action triggering the "close LUN"
1890  * Returns: 0 on success, error otherwise
1891  */
1892 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1893 {
1894         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1895         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1896         struct zfcp_fsf_req *req;
1897         int retval = -EIO;
1898
1899         spin_lock_irq(&qdio->req_q_lock);
1900         if (zfcp_qdio_sbal_get(qdio))
1901                 goto out;
1902
1903         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1904                                   SBAL_FLAGS0_TYPE_READ,
1905                                   qdio->adapter->pool.erp_req);
1906
1907         if (IS_ERR(req)) {
1908                 retval = PTR_ERR(req);
1909                 goto out;
1910         }
1911
1912         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1913         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1914
1915         req->qtcb->header.port_handle = erp_action->port->handle;
1916         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1917         req->handler = zfcp_fsf_close_lun_handler;
1918         req->data = erp_action->sdev;
1919         req->erp_action = erp_action;
1920         erp_action->fsf_req_id = req->req_id;
1921
1922         zfcp_fsf_start_erp_timer(req);
1923         retval = zfcp_fsf_req_send(req);
1924         if (retval) {
1925                 zfcp_fsf_req_free(req);
1926                 erp_action->fsf_req_id = 0;
1927         }
1928 out:
1929         spin_unlock_irq(&qdio->req_q_lock);
1930         return retval;
1931 }
1932
1933 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1934 {
1935         lat_rec->sum += lat;
1936         lat_rec->min = min(lat_rec->min, lat);
1937         lat_rec->max = max(lat_rec->max, lat);
1938 }
1939
1940 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1941 {
1942         struct fsf_qual_latency_info *lat_in;
1943         struct latency_cont *lat = NULL;
1944         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scsi->device);
1945         struct zfcp_blk_drv_data blktrc;
1946         int ticks = req->adapter->timer_ticks;
1947
1948         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1949
1950         blktrc.flags = 0;
1951         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1952         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1953                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1954         blktrc.inb_usage = 0;
1955         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1956
1957         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1958             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1959                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1960                 blktrc.channel_lat = lat_in->channel_lat * ticks;
1961                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1962
1963                 switch (req->qtcb->bottom.io.data_direction) {
1964                 case FSF_DATADIR_DIF_READ_STRIP:
1965                 case FSF_DATADIR_DIF_READ_CONVERT:
1966                 case FSF_DATADIR_READ:
1967                         lat = &zfcp_sdev->latencies.read;
1968                         break;
1969                 case FSF_DATADIR_DIF_WRITE_INSERT:
1970                 case FSF_DATADIR_DIF_WRITE_CONVERT:
1971                 case FSF_DATADIR_WRITE:
1972                         lat = &zfcp_sdev->latencies.write;
1973                         break;
1974                 case FSF_DATADIR_CMND:
1975                         lat = &zfcp_sdev->latencies.cmd;
1976                         break;
1977                 }
1978
1979                 if (lat) {
1980                         spin_lock(&zfcp_sdev->latencies.lock);
1981                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
1982                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
1983                         lat->counter++;
1984                         spin_unlock(&zfcp_sdev->latencies.lock);
1985                 }
1986         }
1987
1988         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
1989                             sizeof(blktrc));
1990 }
1991
1992 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
1993 {
1994         struct scsi_cmnd *scmnd = req->data;
1995         struct scsi_device *sdev = scmnd->device;
1996         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1997         struct fsf_qtcb_header *header = &req->qtcb->header;
1998
1999         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2000                 return;
2001
2002         switch (header->fsf_status) {
2003         case FSF_HANDLE_MISMATCH:
2004         case FSF_PORT_HANDLE_NOT_VALID:
2005                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1",
2006                                         req);
2007                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2008                 break;
2009         case FSF_FCPLUN_NOT_VALID:
2010         case FSF_LUN_HANDLE_NOT_VALID:
2011                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2", req);
2012                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2013                 break;
2014         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2015                 zfcp_fsf_class_not_supp(req);
2016                 break;
2017         case FSF_ACCESS_DENIED:
2018                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2019                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2020                 break;
2021         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2022                 dev_err(&req->adapter->ccw_device->dev,
2023                         "Incorrect direction %d, LUN 0x%016Lx on port "
2024                         "0x%016Lx closed\n",
2025                         req->qtcb->bottom.io.data_direction,
2026                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2027                         (unsigned long long)zfcp_sdev->port->wwpn);
2028                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2029                                           "fssfch3", req);
2030                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2031                 break;
2032         case FSF_CMND_LENGTH_NOT_VALID:
2033                 dev_err(&req->adapter->ccw_device->dev,
2034                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2035                         "port 0x%016Lx closed\n",
2036                         req->qtcb->bottom.io.fcp_cmnd_length,
2037                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2038                         (unsigned long long)zfcp_sdev->port->wwpn);
2039                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2040                                           "fssfch4", req);
2041                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2042                 break;
2043         case FSF_PORT_BOXED:
2044                 zfcp_erp_set_port_status(zfcp_sdev->port,
2045                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2046                 zfcp_erp_port_reopen(zfcp_sdev->port,
2047                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5",
2048                                      req);
2049                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2050                 break;
2051         case FSF_LUN_BOXED:
2052                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2053                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2054                                     "fssfch6", req);
2055                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2056                 break;
2057         case FSF_ADAPTER_STATUS_AVAILABLE:
2058                 if (header->fsf_status_qual.word[0] ==
2059                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2060                         zfcp_fc_test_link(zfcp_sdev->port);
2061                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2062                 break;
2063         }
2064 }
2065
2066 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2067 {
2068         struct scsi_cmnd *scpnt;
2069         struct fcp_resp_with_ext *fcp_rsp;
2070         unsigned long flags;
2071
2072         read_lock_irqsave(&req->adapter->abort_lock, flags);
2073
2074         scpnt = req->data;
2075         if (unlikely(!scpnt)) {
2076                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2077                 return;
2078         }
2079
2080         zfcp_fsf_fcp_handler_common(req);
2081
2082         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2083                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2084                 goto skip_fsfstatus;
2085         }
2086
2087         switch (req->qtcb->header.fsf_status) {
2088         case FSF_INCONSISTENT_PROT_DATA:
2089         case FSF_INVALID_PROT_PARM:
2090                 set_host_byte(scpnt, DID_ERROR);
2091                 goto skip_fsfstatus;
2092         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2093                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2094                 goto skip_fsfstatus;
2095         case FSF_APP_TAG_CHECK_FAILURE:
2096                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2097                 goto skip_fsfstatus;
2098         case FSF_REF_TAG_CHECK_FAILURE:
2099                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2100                 goto skip_fsfstatus;
2101         }
2102         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2103         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2104
2105 skip_fsfstatus:
2106         zfcp_fsf_req_trace(req, scpnt);
2107         zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req);
2108
2109         scpnt->host_scribble = NULL;
2110         (scpnt->scsi_done) (scpnt);
2111         /*
2112          * We must hold this lock until scsi_done has been called.
2113          * Otherwise we may call scsi_done after abort regarding this
2114          * command has completed.
2115          * Note: scsi_done must not block!
2116          */
2117         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2118 }
2119
2120 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2121 {
2122         switch (scsi_get_prot_op(scsi_cmnd)) {
2123         case SCSI_PROT_NORMAL:
2124                 switch (scsi_cmnd->sc_data_direction) {
2125                 case DMA_NONE:
2126                         *data_dir = FSF_DATADIR_CMND;
2127                         break;
2128                 case DMA_FROM_DEVICE:
2129                         *data_dir = FSF_DATADIR_READ;
2130                         break;
2131                 case DMA_TO_DEVICE:
2132                         *data_dir = FSF_DATADIR_WRITE;
2133                         break;
2134                 case DMA_BIDIRECTIONAL:
2135                         return -EINVAL;
2136                 }
2137                 break;
2138
2139         case SCSI_PROT_READ_STRIP:
2140                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2141                 break;
2142         case SCSI_PROT_WRITE_INSERT:
2143                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2144                 break;
2145         case SCSI_PROT_READ_PASS:
2146                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2147                 break;
2148         case SCSI_PROT_WRITE_PASS:
2149                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2150                 break;
2151         default:
2152                 return -EINVAL;
2153         }
2154
2155         return 0;
2156 }
2157
2158 /**
2159  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2160  * @scsi_cmnd: scsi command to be sent
2161  */
2162 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2163 {
2164         struct zfcp_fsf_req *req;
2165         struct fcp_cmnd *fcp_cmnd;
2166         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2167         int real_bytes, retval = -EIO, dix_bytes = 0;
2168         struct scsi_device *sdev = scsi_cmnd->device;
2169         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2170         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2171         struct zfcp_qdio *qdio = adapter->qdio;
2172         struct fsf_qtcb_bottom_io *io;
2173         unsigned long flags;
2174
2175         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2176                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2177                 return -EBUSY;
2178
2179         spin_lock_irqsave(&qdio->req_q_lock, flags);
2180         if (atomic_read(&qdio->req_q_free) <= 0) {
2181                 atomic_inc(&qdio->req_q_full);
2182                 goto out;
2183         }
2184
2185         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2186                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2187
2188         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2189                                   sbtype, adapter->pool.scsi_req);
2190
2191         if (IS_ERR(req)) {
2192                 retval = PTR_ERR(req);
2193                 goto out;
2194         }
2195
2196         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2197
2198         io = &req->qtcb->bottom.io;
2199         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2200         req->data = scsi_cmnd;
2201         req->handler = zfcp_fsf_fcp_cmnd_handler;
2202         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2203         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2204         io->service_class = FSF_CLASS_3;
2205         io->fcp_cmnd_length = FCP_CMND_LEN;
2206
2207         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2208                 io->data_block_length = scsi_cmnd->device->sector_size;
2209                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2210         }
2211
2212         zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction);
2213
2214         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2215         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2216
2217         if (scsi_prot_sg_count(scsi_cmnd)) {
2218                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2219                                        scsi_prot_sg_count(scsi_cmnd));
2220                 dix_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2221                                                 scsi_prot_sglist(scsi_cmnd));
2222                 io->prot_data_length = dix_bytes;
2223         }
2224
2225         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2226                                              scsi_sglist(scsi_cmnd));
2227
2228         if (unlikely(real_bytes < 0) || unlikely(dix_bytes < 0))
2229                 goto failed_scsi_cmnd;
2230
2231         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2232
2233         retval = zfcp_fsf_req_send(req);
2234         if (unlikely(retval))
2235                 goto failed_scsi_cmnd;
2236
2237         goto out;
2238
2239 failed_scsi_cmnd:
2240         zfcp_fsf_req_free(req);
2241         scsi_cmnd->host_scribble = NULL;
2242 out:
2243         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2244         return retval;
2245 }
2246
2247 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2248 {
2249         struct fcp_resp_with_ext *fcp_rsp;
2250         struct fcp_resp_rsp_info *rsp_info;
2251
2252         zfcp_fsf_fcp_handler_common(req);
2253
2254         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2255         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2256
2257         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2258              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2259                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2260 }
2261
2262 /**
2263  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2264  * @scmnd: SCSI command to send the task management command for
2265  * @tm_flags: unsigned byte for task management flags
2266  * Returns: on success pointer to struct fsf_req, NULL otherwise
2267  */
2268 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2269                                             u8 tm_flags)
2270 {
2271         struct zfcp_fsf_req *req = NULL;
2272         struct fcp_cmnd *fcp_cmnd;
2273         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2274         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2275
2276         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2277                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2278                 return NULL;
2279
2280         spin_lock_irq(&qdio->req_q_lock);
2281         if (zfcp_qdio_sbal_get(qdio))
2282                 goto out;
2283
2284         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2285                                   SBAL_FLAGS0_TYPE_WRITE,
2286                                   qdio->adapter->pool.scsi_req);
2287
2288         if (IS_ERR(req)) {
2289                 req = NULL;
2290                 goto out;
2291         }
2292
2293         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2294         req->data = scmnd;
2295         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2296         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2297         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2298         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2299         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2300         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2301
2302         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2303
2304         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2305         zfcp_fc_fcp_tm(fcp_cmnd, scmnd->device, tm_flags);
2306
2307         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2308         if (!zfcp_fsf_req_send(req))
2309                 goto out;
2310
2311         zfcp_fsf_req_free(req);
2312         req = NULL;
2313 out:
2314         spin_unlock_irq(&qdio->req_q_lock);
2315         return req;
2316 }
2317
2318 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2319 {
2320 }
2321
2322 /**
2323  * zfcp_fsf_control_file - control file upload/download
2324  * @adapter: pointer to struct zfcp_adapter
2325  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2326  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2327  */
2328 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2329                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2330 {
2331         struct zfcp_qdio *qdio = adapter->qdio;
2332         struct zfcp_fsf_req *req = NULL;
2333         struct fsf_qtcb_bottom_support *bottom;
2334         int direction, retval = -EIO, bytes;
2335
2336         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2337                 return ERR_PTR(-EOPNOTSUPP);
2338
2339         switch (fsf_cfdc->command) {
2340         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2341                 direction = SBAL_FLAGS0_TYPE_WRITE;
2342                 break;
2343         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2344                 direction = SBAL_FLAGS0_TYPE_READ;
2345                 break;
2346         default:
2347                 return ERR_PTR(-EINVAL);
2348         }
2349
2350         spin_lock_irq(&qdio->req_q_lock);
2351         if (zfcp_qdio_sbal_get(qdio))
2352                 goto out;
2353
2354         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2355         if (IS_ERR(req)) {
2356                 retval = -EPERM;
2357                 goto out;
2358         }
2359
2360         req->handler = zfcp_fsf_control_file_handler;
2361
2362         bottom = &req->qtcb->bottom.support;
2363         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2364         bottom->option = fsf_cfdc->option;
2365
2366         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2367
2368         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2369                 zfcp_fsf_req_free(req);
2370                 goto out;
2371         }
2372         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2373
2374         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2375         retval = zfcp_fsf_req_send(req);
2376 out:
2377         spin_unlock_irq(&qdio->req_q_lock);
2378
2379         if (!retval) {
2380                 wait_for_completion(&req->completion);
2381                 return req;
2382         }
2383         return ERR_PTR(retval);
2384 }
2385
2386 /**
2387  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2388  * @adapter: pointer to struct zfcp_adapter
2389  * @sbal_idx: response queue index of SBAL to be processed
2390  */
2391 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2392 {
2393         struct zfcp_adapter *adapter = qdio->adapter;
2394         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2395         struct qdio_buffer_element *sbale;
2396         struct zfcp_fsf_req *fsf_req;
2397         unsigned long req_id;
2398         int idx;
2399
2400         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2401
2402                 sbale = &sbal->element[idx];
2403                 req_id = (unsigned long) sbale->addr;
2404                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2405
2406                 if (!fsf_req) {
2407                         /*
2408                          * Unknown request means that we have potentially memory
2409                          * corruption and must stop the machine immediately.
2410                          */
2411                         zfcp_qdio_siosl(adapter);
2412                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2413                               req_id, dev_name(&adapter->ccw_device->dev));
2414                 }
2415
2416                 fsf_req->qdio_req.sbal_response = sbal_idx;
2417                 zfcp_fsf_req_complete(fsf_req);
2418
2419                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2420                         break;
2421         }
2422 }