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");
  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");
  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");
 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_uss("fssrh_1", req);
 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_uss("fssrh_2", req);
 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_bit_err("fssrh_3", 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");
 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");
 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");
 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");
 339                 break;
 340         case FSF_PROT_ERROR_STATE:
 341         case FSF_PROT_SEQ_NUMB_ERROR:
 342                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 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");
 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");
 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");
 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");
 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");
 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");
 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");
 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");
 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");
 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");
 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");
 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         req->data = NULL;
 758         mempool_free(sr_buf, adapter->pool.status_read_data);
 759 failed_buf:
 760         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 761         zfcp_fsf_req_free(req);
 762 out:
 763         spin_unlock_irq(&qdio->req_q_lock);
 764         return retval;
 765 }
 766
 767 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 768 {
 769         struct scsi_device *sdev = req->data;
 770         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 771         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 772
 773         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 774                 return;
 775
 776         switch (req->qtcb->header.fsf_status) {
 777         case FSF_PORT_HANDLE_NOT_VALID:
 778                 if (fsq->word[0] == fsq->word[1]) {
 779                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 780                                                 "fsafch1");
 781                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 782                 }
 783                 break;
 784         case FSF_LUN_HANDLE_NOT_VALID:
 785                 if (fsq->word[0] == fsq->word[1]) {
 786                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 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->status |= ZFCP_STATUS_FSFREQ_ERROR;
 799                 break;
 800         case FSF_LUN_BOXED:
 801                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 802                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 803                                     "fsafch4");
 804                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 805                 break;
 806         case FSF_ADAPTER_STATUS_AVAILABLE:
 807                 switch (fsq->word[0]) {
 808                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 809                         zfcp_fc_test_link(zfcp_sdev->port);
 810                         /* fall through */
 811                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 812                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 813                         break;
 814                 }
 815                 break;
 816         case FSF_GOOD:
 817                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 818                 break;
 819         }
 820 }
 821
 822 /**
 823  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 824  * @scmnd: The SCSI command to abort
 825  * Returns: pointer to struct zfcp_fsf_req
 826  */
 827
 828 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 829 {
 830         struct zfcp_fsf_req *req = NULL;
 831         struct scsi_device *sdev = scmnd->device;
 832         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 833         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 834         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 835
 836         spin_lock_irq(&qdio->req_q_lock);
 837         if (zfcp_qdio_sbal_get(qdio))
 838                 goto out;
 839         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 840                                   SBAL_FLAGS0_TYPE_READ,
 841                                   qdio->adapter->pool.scsi_abort);
 842         if (IS_ERR(req)) {
 843                 req = NULL;
 844                 goto out;
 845         }
 846
 847         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 848                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 849                 goto out_error_free;
 850
 851         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 852
 853         req->data = sdev;
 854         req->handler = zfcp_fsf_abort_fcp_command_handler;
 855         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 856         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 857         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 858
 859         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 860         if (!zfcp_fsf_req_send(req))
 861                 goto out;
 862
 863 out_error_free:
 864         zfcp_fsf_req_free(req);
 865         req = NULL;
 866 out:
 867         spin_unlock_irq(&qdio->req_q_lock);
 868         return req;
 869 }
 870
 871 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 872 {
 873         struct zfcp_adapter *adapter = req->adapter;
 874         struct zfcp_fsf_ct_els *ct = req->data;
 875         struct fsf_qtcb_header *header = &req->qtcb->header;
 876
 877         ct->status = -EINVAL;
 878
 879         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 880                 goto skip_fsfstatus;
 881
 882         switch (header->fsf_status) {
 883         case FSF_GOOD:
 884                 zfcp_dbf_san_res("fsscth1", req);
 885                 ct->status = 0;
 886                 break;
 887         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 888                 zfcp_fsf_class_not_supp(req);
 889                 break;
 890         case FSF_ADAPTER_STATUS_AVAILABLE:
 891                 switch (header->fsf_status_qual.word[0]){
 892                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 893                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 894                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 895                         break;
 896                 }
 897                 break;
 898         case FSF_ACCESS_DENIED:
 899                 break;
 900         case FSF_PORT_BOXED:
 901                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 902                 break;
 903         case FSF_PORT_HANDLE_NOT_VALID:
 904                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 905                 /* fall through */
 906         case FSF_GENERIC_COMMAND_REJECTED:
 907         case FSF_PAYLOAD_SIZE_MISMATCH:
 908         case FSF_REQUEST_SIZE_TOO_LARGE:
 909         case FSF_RESPONSE_SIZE_TOO_LARGE:
 910         case FSF_SBAL_MISMATCH:
 911                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 912                 break;
 913         }
 914
 915 skip_fsfstatus:
 916         if (ct->handler)
 917                 ct->handler(ct->handler_data);
 918 }
 919
 920 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 921                                             struct zfcp_qdio_req *q_req,
 922                                             struct scatterlist *sg_req,
 923                                             struct scatterlist *sg_resp)
 924 {
 925         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 926         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 927         zfcp_qdio_set_sbale_last(qdio, q_req);
 928 }
 929
 930 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 931                                        struct scatterlist *sg_req,
 932                                        struct scatterlist *sg_resp)
 933 {
 934         struct zfcp_adapter *adapter = req->adapter;
 935         u32 feat = adapter->adapter_features;
 936         int bytes;
 937
 938         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
 939                 if (!zfcp_qdio_sg_one_sbale(sg_req) ||
 940                     !zfcp_qdio_sg_one_sbale(sg_resp))
 941                         return -EOPNOTSUPP;
 942
 943                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 944                                                 sg_req, sg_resp);
 945                 return 0;
 946         }
 947
 948         /* use single, unchained SBAL if it can hold the request */
 949         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 950                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 951                                                 sg_req, sg_resp);
 952                 return 0;
 953         }
 954
 955         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, sg_req);
 956         if (bytes <= 0)
 957                 return -EIO;
 958         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 959         req->qtcb->bottom.support.req_buf_length = bytes;
 960         zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
 961
 962         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
 963                                         sg_resp);
 964         req->qtcb->bottom.support.resp_buf_length = bytes;
 965         if (bytes <= 0)
 966                 return -EIO;
 967         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 968
 969         return 0;
 970 }
 971
 972 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
 973                                  struct scatterlist *sg_req,
 974                                  struct scatterlist *sg_resp,
 975                                  unsigned int timeout)
 976 {
 977         int ret;
 978
 979         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
 980         if (ret)
 981                 return ret;
 982
 983         /* common settings for ct/gs and els requests */
 984         if (timeout > 255)
 985                 timeout = 255; /* max value accepted by hardware */
 986         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
 987         req->qtcb->bottom.support.timeout = timeout;
 988         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
 989
 990         return 0;
 991 }
 992
 993 /**
 994  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
 995  * @ct: pointer to struct zfcp_send_ct with data for request
 996  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
 997  */
 998 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
 999                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1000                      unsigned int timeout)
1001 {
1002         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1003         struct zfcp_fsf_req *req;
1004         int ret = -EIO;
1005
1006         spin_lock_irq(&qdio->req_q_lock);
1007         if (zfcp_qdio_sbal_get(qdio))
1008                 goto out;
1009
1010         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1011                                   SBAL_FLAGS0_TYPE_WRITE_READ, pool);
1012
1013         if (IS_ERR(req)) {
1014                 ret = PTR_ERR(req);
1015                 goto out;
1016         }
1017
1018         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1019         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1020         if (ret)
1021                 goto failed_send;
1022
1023         req->handler = zfcp_fsf_send_ct_handler;
1024         req->qtcb->header.port_handle = wka_port->handle;
1025         req->data = ct;
1026
1027         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1028
1029         ret = zfcp_fsf_req_send(req);
1030         if (ret)
1031                 goto failed_send;
1032
1033         goto out;
1034
1035 failed_send:
1036         zfcp_fsf_req_free(req);
1037 out:
1038         spin_unlock_irq(&qdio->req_q_lock);
1039         return ret;
1040 }
1041
1042 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1043 {
1044         struct zfcp_fsf_ct_els *send_els = req->data;
1045         struct zfcp_port *port = send_els->port;
1046         struct fsf_qtcb_header *header = &req->qtcb->header;
1047
1048         send_els->status = -EINVAL;
1049
1050         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1051                 goto skip_fsfstatus;
1052
1053         switch (header->fsf_status) {
1054         case FSF_GOOD:
1055                 zfcp_dbf_san_res("fsselh1", req);
1056                 send_els->status = 0;
1057                 break;
1058         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1059                 zfcp_fsf_class_not_supp(req);
1060                 break;
1061         case FSF_ADAPTER_STATUS_AVAILABLE:
1062                 switch (header->fsf_status_qual.word[0]){
1063                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1064                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1065                 case FSF_SQ_RETRY_IF_POSSIBLE:
1066                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1067                         break;
1068                 }
1069                 break;
1070         case FSF_ELS_COMMAND_REJECTED:
1071         case FSF_PAYLOAD_SIZE_MISMATCH:
1072         case FSF_REQUEST_SIZE_TOO_LARGE:
1073         case FSF_RESPONSE_SIZE_TOO_LARGE:
1074                 break;
1075         case FSF_ACCESS_DENIED:
1076                 if (port) {
1077                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1078                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1079                 }
1080                 break;
1081         case FSF_SBAL_MISMATCH:
1082                 /* should never occure, avoided in zfcp_fsf_send_els */
1083                 /* fall through */
1084         default:
1085                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1086                 break;
1087         }
1088 skip_fsfstatus:
1089         if (send_els->handler)
1090                 send_els->handler(send_els->handler_data);
1091 }
1092
1093 /**
1094  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1095  * @els: pointer to struct zfcp_send_els with data for the command
1096  */
1097 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1098                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1099 {
1100         struct zfcp_fsf_req *req;
1101         struct zfcp_qdio *qdio = adapter->qdio;
1102         int ret = -EIO;
1103
1104         spin_lock_irq(&qdio->req_q_lock);
1105         if (zfcp_qdio_sbal_get(qdio))
1106                 goto out;
1107
1108         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1109                                   SBAL_FLAGS0_TYPE_WRITE_READ, NULL);
1110
1111         if (IS_ERR(req)) {
1112                 ret = PTR_ERR(req);
1113                 goto out;
1114         }
1115
1116         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1117
1118         zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1119
1120         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1121
1122         if (ret)
1123                 goto failed_send;
1124
1125         hton24(req->qtcb->bottom.support.d_id, d_id);
1126         req->handler = zfcp_fsf_send_els_handler;
1127         req->data = els;
1128
1129         zfcp_dbf_san_req("fssels1", req, d_id);
1130
1131         ret = zfcp_fsf_req_send(req);
1132         if (ret)
1133                 goto failed_send;
1134
1135         goto out;
1136
1137 failed_send:
1138         zfcp_fsf_req_free(req);
1139 out:
1140         spin_unlock_irq(&qdio->req_q_lock);
1141         return ret;
1142 }
1143
1144 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1145 {
1146         struct zfcp_fsf_req *req;
1147         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1148         int retval = -EIO;
1149
1150         spin_lock_irq(&qdio->req_q_lock);
1151         if (zfcp_qdio_sbal_get(qdio))
1152                 goto out;
1153
1154         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1155                                   SBAL_FLAGS0_TYPE_READ,
1156                                   qdio->adapter->pool.erp_req);
1157
1158         if (IS_ERR(req)) {
1159                 retval = PTR_ERR(req);
1160                 goto out;
1161         }
1162
1163         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1164         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1165
1166         req->qtcb->bottom.config.feature_selection =
1167                         FSF_FEATURE_CFDC |
1168                         FSF_FEATURE_LUN_SHARING |
1169                         FSF_FEATURE_NOTIFICATION_LOST |
1170                         FSF_FEATURE_UPDATE_ALERT;
1171         req->erp_action = erp_action;
1172         req->handler = zfcp_fsf_exchange_config_data_handler;
1173         erp_action->fsf_req_id = req->req_id;
1174
1175         zfcp_fsf_start_erp_timer(req);
1176         retval = zfcp_fsf_req_send(req);
1177         if (retval) {
1178                 zfcp_fsf_req_free(req);
1179                 erp_action->fsf_req_id = 0;
1180         }
1181 out:
1182         spin_unlock_irq(&qdio->req_q_lock);
1183         return retval;
1184 }
1185
1186 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1187                                        struct fsf_qtcb_bottom_config *data)
1188 {
1189         struct zfcp_fsf_req *req = NULL;
1190         int retval = -EIO;
1191
1192         spin_lock_irq(&qdio->req_q_lock);
1193         if (zfcp_qdio_sbal_get(qdio))
1194                 goto out_unlock;
1195
1196         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1197                                   SBAL_FLAGS0_TYPE_READ, NULL);
1198
1199         if (IS_ERR(req)) {
1200                 retval = PTR_ERR(req);
1201                 goto out_unlock;
1202         }
1203
1204         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1205         req->handler = zfcp_fsf_exchange_config_data_handler;
1206
1207         req->qtcb->bottom.config.feature_selection =
1208                         FSF_FEATURE_CFDC |
1209                         FSF_FEATURE_LUN_SHARING |
1210                         FSF_FEATURE_NOTIFICATION_LOST |
1211                         FSF_FEATURE_UPDATE_ALERT;
1212
1213         if (data)
1214                 req->data = data;
1215
1216         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1217         retval = zfcp_fsf_req_send(req);
1218         spin_unlock_irq(&qdio->req_q_lock);
1219         if (!retval)
1220                 wait_for_completion(&req->completion);
1221
1222         zfcp_fsf_req_free(req);
1223         return retval;
1224
1225 out_unlock:
1226         spin_unlock_irq(&qdio->req_q_lock);
1227         return retval;
1228 }
1229
1230 /**
1231  * zfcp_fsf_exchange_port_data - request information about local port
1232  * @erp_action: ERP action for the adapter for which port data is requested
1233  * Returns: 0 on success, error otherwise
1234  */
1235 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1236 {
1237         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1238         struct zfcp_fsf_req *req;
1239         int retval = -EIO;
1240
1241         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1242                 return -EOPNOTSUPP;
1243
1244         spin_lock_irq(&qdio->req_q_lock);
1245         if (zfcp_qdio_sbal_get(qdio))
1246                 goto out;
1247
1248         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1249                                   SBAL_FLAGS0_TYPE_READ,
1250                                   qdio->adapter->pool.erp_req);
1251
1252         if (IS_ERR(req)) {
1253                 retval = PTR_ERR(req);
1254                 goto out;
1255         }
1256
1257         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1258         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1259
1260         req->handler = zfcp_fsf_exchange_port_data_handler;
1261         req->erp_action = erp_action;
1262         erp_action->fsf_req_id = req->req_id;
1263
1264         zfcp_fsf_start_erp_timer(req);
1265         retval = zfcp_fsf_req_send(req);
1266         if (retval) {
1267                 zfcp_fsf_req_free(req);
1268                 erp_action->fsf_req_id = 0;
1269         }
1270 out:
1271         spin_unlock_irq(&qdio->req_q_lock);
1272         return retval;
1273 }
1274
1275 /**
1276  * zfcp_fsf_exchange_port_data_sync - request information about local port
1277  * @qdio: pointer to struct zfcp_qdio
1278  * @data: pointer to struct fsf_qtcb_bottom_port
1279  * Returns: 0 on success, error otherwise
1280  */
1281 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1282                                      struct fsf_qtcb_bottom_port *data)
1283 {
1284         struct zfcp_fsf_req *req = NULL;
1285         int retval = -EIO;
1286
1287         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1288                 return -EOPNOTSUPP;
1289
1290         spin_lock_irq(&qdio->req_q_lock);
1291         if (zfcp_qdio_sbal_get(qdio))
1292                 goto out_unlock;
1293
1294         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1295                                   SBAL_FLAGS0_TYPE_READ, NULL);
1296
1297         if (IS_ERR(req)) {
1298                 retval = PTR_ERR(req);
1299                 goto out_unlock;
1300         }
1301
1302         if (data)
1303                 req->data = data;
1304
1305         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1306
1307         req->handler = zfcp_fsf_exchange_port_data_handler;
1308         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1309         retval = zfcp_fsf_req_send(req);
1310         spin_unlock_irq(&qdio->req_q_lock);
1311
1312         if (!retval)
1313                 wait_for_completion(&req->completion);
1314
1315         zfcp_fsf_req_free(req);
1316
1317         return retval;
1318
1319 out_unlock:
1320         spin_unlock_irq(&qdio->req_q_lock);
1321         return retval;
1322 }
1323
1324 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1325 {
1326         struct zfcp_port *port = req->data;
1327         struct fsf_qtcb_header *header = &req->qtcb->header;
1328         struct fc_els_flogi *plogi;
1329
1330         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1331                 goto out;
1332
1333         switch (header->fsf_status) {
1334         case FSF_PORT_ALREADY_OPEN:
1335                 break;
1336         case FSF_ACCESS_DENIED:
1337                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1338                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1339                 break;
1340         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1341                 dev_warn(&req->adapter->ccw_device->dev,
1342                          "Not enough FCP adapter resources to open "
1343                          "remote port 0x%016Lx\n",
1344                          (unsigned long long)port->wwpn);
1345                 zfcp_erp_set_port_status(port,
1346                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1347                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1348                 break;
1349         case FSF_ADAPTER_STATUS_AVAILABLE:
1350                 switch (header->fsf_status_qual.word[0]) {
1351                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1352                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1353                 case FSF_SQ_NO_RETRY_POSSIBLE:
1354                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1355                         break;
1356                 }
1357                 break;
1358         case FSF_GOOD:
1359                 port->handle = header->port_handle;
1360                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1361                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1362                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1363                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1364                                   &port->status);
1365                 /* check whether D_ID has changed during open */
1366                 /*
1367                  * FIXME: This check is not airtight, as the FCP channel does
1368                  * not monitor closures of target port connections caused on
1369                  * the remote side. Thus, they might miss out on invalidating
1370                  * locally cached WWPNs (and other N_Port parameters) of gone
1371                  * target ports. So, our heroic attempt to make things safe
1372                  * could be undermined by 'open port' response data tagged with
1373                  * obsolete WWPNs. Another reason to monitor potential
1374                  * connection closures ourself at least (by interpreting
1375                  * incoming ELS' and unsolicited status). It just crosses my
1376                  * mind that one should be able to cross-check by means of
1377                  * another GID_PN straight after a port has been opened.
1378                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1379                  */
1380                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1381                 if (req->qtcb->bottom.support.els1_length >=
1382                     FSF_PLOGI_MIN_LEN)
1383                                 zfcp_fc_plogi_evaluate(port, plogi);
1384                 break;
1385         case FSF_UNKNOWN_OP_SUBTYPE:
1386                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1387                 break;
1388         }
1389
1390 out:
1391         put_device(&port->dev);
1392 }
1393
1394 /**
1395  * zfcp_fsf_open_port - create and send open port request
1396  * @erp_action: pointer to struct zfcp_erp_action
1397  * Returns: 0 on success, error otherwise
1398  */
1399 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1400 {
1401         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1402         struct zfcp_port *port = erp_action->port;
1403         struct zfcp_fsf_req *req;
1404         int retval = -EIO;
1405
1406         spin_lock_irq(&qdio->req_q_lock);
1407         if (zfcp_qdio_sbal_get(qdio))
1408                 goto out;
1409
1410         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1411                                   SBAL_FLAGS0_TYPE_READ,
1412                                   qdio->adapter->pool.erp_req);
1413
1414         if (IS_ERR(req)) {
1415                 retval = PTR_ERR(req);
1416                 goto out;
1417         }
1418
1419         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1420         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1421
1422         req->handler = zfcp_fsf_open_port_handler;
1423         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1424         req->data = port;
1425         req->erp_action = erp_action;
1426         erp_action->fsf_req_id = req->req_id;
1427         get_device(&port->dev);
1428
1429         zfcp_fsf_start_erp_timer(req);
1430         retval = zfcp_fsf_req_send(req);
1431         if (retval) {
1432                 zfcp_fsf_req_free(req);
1433                 erp_action->fsf_req_id = 0;
1434                 put_device(&port->dev);
1435         }
1436 out:
1437         spin_unlock_irq(&qdio->req_q_lock);
1438         return retval;
1439 }
1440
1441 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1442 {
1443         struct zfcp_port *port = req->data;
1444
1445         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1446                 return;
1447
1448         switch (req->qtcb->header.fsf_status) {
1449         case FSF_PORT_HANDLE_NOT_VALID:
1450                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1451                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1452                 break;
1453         case FSF_ADAPTER_STATUS_AVAILABLE:
1454                 break;
1455         case FSF_GOOD:
1456                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1457                 break;
1458         }
1459 }
1460
1461 /**
1462  * zfcp_fsf_close_port - create and send close port request
1463  * @erp_action: pointer to struct zfcp_erp_action
1464  * Returns: 0 on success, error otherwise
1465  */
1466 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1467 {
1468         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1469         struct zfcp_fsf_req *req;
1470         int retval = -EIO;
1471
1472         spin_lock_irq(&qdio->req_q_lock);
1473         if (zfcp_qdio_sbal_get(qdio))
1474                 goto out;
1475
1476         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1477                                   SBAL_FLAGS0_TYPE_READ,
1478                                   qdio->adapter->pool.erp_req);
1479
1480         if (IS_ERR(req)) {
1481                 retval = PTR_ERR(req);
1482                 goto out;
1483         }
1484
1485         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1486         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1487
1488         req->handler = zfcp_fsf_close_port_handler;
1489         req->data = erp_action->port;
1490         req->erp_action = erp_action;
1491         req->qtcb->header.port_handle = erp_action->port->handle;
1492         erp_action->fsf_req_id = req->req_id;
1493
1494         zfcp_fsf_start_erp_timer(req);
1495         retval = zfcp_fsf_req_send(req);
1496         if (retval) {
1497                 zfcp_fsf_req_free(req);
1498                 erp_action->fsf_req_id = 0;
1499         }
1500 out:
1501         spin_unlock_irq(&qdio->req_q_lock);
1502         return retval;
1503 }
1504
1505 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1506 {
1507         struct zfcp_fc_wka_port *wka_port = req->data;
1508         struct fsf_qtcb_header *header = &req->qtcb->header;
1509
1510         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1511                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1512                 goto out;
1513         }
1514
1515         switch (header->fsf_status) {
1516         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1517                 dev_warn(&req->adapter->ccw_device->dev,
1518                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1519                 /* fall through */
1520         case FSF_ADAPTER_STATUS_AVAILABLE:
1521                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1522                 /* fall through */
1523         case FSF_ACCESS_DENIED:
1524                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1525                 break;
1526         case FSF_GOOD:
1527                 wka_port->handle = header->port_handle;
1528                 /* fall through */
1529         case FSF_PORT_ALREADY_OPEN:
1530                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1531         }
1532 out:
1533         wake_up(&wka_port->completion_wq);
1534 }
1535
1536 /**
1537  * zfcp_fsf_open_wka_port - create and send open wka-port request
1538  * @wka_port: pointer to struct zfcp_fc_wka_port
1539  * Returns: 0 on success, error otherwise
1540  */
1541 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1542 {
1543         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1544         struct zfcp_fsf_req *req;
1545         int retval = -EIO;
1546
1547         spin_lock_irq(&qdio->req_q_lock);
1548         if (zfcp_qdio_sbal_get(qdio))
1549                 goto out;
1550
1551         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1552                                   SBAL_FLAGS0_TYPE_READ,
1553                                   qdio->adapter->pool.erp_req);
1554
1555         if (unlikely(IS_ERR(req))) {
1556                 retval = PTR_ERR(req);
1557                 goto out;
1558         }
1559
1560         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1561         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1562
1563         req->handler = zfcp_fsf_open_wka_port_handler;
1564         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1565         req->data = wka_port;
1566
1567         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1568         retval = zfcp_fsf_req_send(req);
1569         if (retval)
1570                 zfcp_fsf_req_free(req);
1571 out:
1572         spin_unlock_irq(&qdio->req_q_lock);
1573         return retval;
1574 }
1575
1576 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1577 {
1578         struct zfcp_fc_wka_port *wka_port = req->data;
1579
1580         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1581                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1582                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1583         }
1584
1585         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1586         wake_up(&wka_port->completion_wq);
1587 }
1588
1589 /**
1590  * zfcp_fsf_close_wka_port - create and send close wka port request
1591  * @wka_port: WKA port to open
1592  * Returns: 0 on success, error otherwise
1593  */
1594 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1595 {
1596         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1597         struct zfcp_fsf_req *req;
1598         int retval = -EIO;
1599
1600         spin_lock_irq(&qdio->req_q_lock);
1601         if (zfcp_qdio_sbal_get(qdio))
1602                 goto out;
1603
1604         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1605                                   SBAL_FLAGS0_TYPE_READ,
1606                                   qdio->adapter->pool.erp_req);
1607
1608         if (unlikely(IS_ERR(req))) {
1609                 retval = PTR_ERR(req);
1610                 goto out;
1611         }
1612
1613         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1614         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1615
1616         req->handler = zfcp_fsf_close_wka_port_handler;
1617         req->data = wka_port;
1618         req->qtcb->header.port_handle = wka_port->handle;
1619
1620         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1621         retval = zfcp_fsf_req_send(req);
1622         if (retval)
1623                 zfcp_fsf_req_free(req);
1624 out:
1625         spin_unlock_irq(&qdio->req_q_lock);
1626         return retval;
1627 }
1628
1629 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1630 {
1631         struct zfcp_port *port = req->data;
1632         struct fsf_qtcb_header *header = &req->qtcb->header;
1633         struct scsi_device *sdev;
1634
1635         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1636                 return;
1637
1638         switch (header->fsf_status) {
1639         case FSF_PORT_HANDLE_NOT_VALID:
1640                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1641                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1642                 break;
1643         case FSF_ACCESS_DENIED:
1644                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1645                 break;
1646         case FSF_PORT_BOXED:
1647                 /* can't use generic zfcp_erp_modify_port_status because
1648                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1649                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1650                 shost_for_each_device(sdev, port->adapter->scsi_host)
1651                         if (sdev_to_zfcp(sdev)->port == port)
1652                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1653                                                   &sdev_to_zfcp(sdev)->status);
1654                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1655                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1656                                      "fscpph2");
1657                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1658                 break;
1659         case FSF_ADAPTER_STATUS_AVAILABLE:
1660                 switch (header->fsf_status_qual.word[0]) {
1661                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1662                         /* fall through */
1663                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1664                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1665                         break;
1666                 }
1667                 break;
1668         case FSF_GOOD:
1669                 /* can't use generic zfcp_erp_modify_port_status because
1670                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1671                  */
1672                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1673                 shost_for_each_device(sdev, port->adapter->scsi_host)
1674                         if (sdev_to_zfcp(sdev)->port == port)
1675                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1676                                                   &sdev_to_zfcp(sdev)->status);
1677                 break;
1678         }
1679 }
1680
1681 /**
1682  * zfcp_fsf_close_physical_port - close physical port
1683  * @erp_action: pointer to struct zfcp_erp_action
1684  * Returns: 0 on success
1685  */
1686 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1687 {
1688         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1689         struct zfcp_fsf_req *req;
1690         int retval = -EIO;
1691
1692         spin_lock_irq(&qdio->req_q_lock);
1693         if (zfcp_qdio_sbal_get(qdio))
1694                 goto out;
1695
1696         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1697                                   SBAL_FLAGS0_TYPE_READ,
1698                                   qdio->adapter->pool.erp_req);
1699
1700         if (IS_ERR(req)) {
1701                 retval = PTR_ERR(req);
1702                 goto out;
1703         }
1704
1705         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1706         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1707
1708         req->data = erp_action->port;
1709         req->qtcb->header.port_handle = erp_action->port->handle;
1710         req->erp_action = erp_action;
1711         req->handler = zfcp_fsf_close_physical_port_handler;
1712         erp_action->fsf_req_id = req->req_id;
1713
1714         zfcp_fsf_start_erp_timer(req);
1715         retval = zfcp_fsf_req_send(req);
1716         if (retval) {
1717                 zfcp_fsf_req_free(req);
1718                 erp_action->fsf_req_id = 0;
1719         }
1720 out:
1721         spin_unlock_irq(&qdio->req_q_lock);
1722         return retval;
1723 }
1724
1725 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1726 {
1727         struct zfcp_adapter *adapter = req->adapter;
1728         struct scsi_device *sdev = req->data;
1729         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1730         struct fsf_qtcb_header *header = &req->qtcb->header;
1731         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1732
1733         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1734                 return;
1735
1736         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1737                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1738                           ZFCP_STATUS_LUN_SHARED |
1739                           ZFCP_STATUS_LUN_READONLY,
1740                           &zfcp_sdev->status);
1741
1742         switch (header->fsf_status) {
1743
1744         case FSF_PORT_HANDLE_NOT_VALID:
1745                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1746                 /* fall through */
1747         case FSF_LUN_ALREADY_OPEN:
1748                 break;
1749         case FSF_ACCESS_DENIED:
1750                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1751                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1752                 break;
1753         case FSF_PORT_BOXED:
1754                 zfcp_erp_set_port_status(zfcp_sdev->port,
1755                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1756                 zfcp_erp_port_reopen(zfcp_sdev->port,
1757                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1758                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1759                 break;
1760         case FSF_LUN_SHARING_VIOLATION:
1761                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1762                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1763                 break;
1764         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1765                 dev_warn(&adapter->ccw_device->dev,
1766                          "No handle is available for LUN "
1767                          "0x%016Lx on port 0x%016Lx\n",
1768                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1769                          (unsigned long long)zfcp_sdev->port->wwpn);
1770                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1771                 /* fall through */
1772         case FSF_INVALID_COMMAND_OPTION:
1773                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1774                 break;
1775         case FSF_ADAPTER_STATUS_AVAILABLE:
1776                 switch (header->fsf_status_qual.word[0]) {
1777                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1778                         zfcp_fc_test_link(zfcp_sdev->port);
1779                         /* fall through */
1780                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1781                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1782                         break;
1783                 }
1784                 break;
1785
1786         case FSF_GOOD:
1787                 zfcp_sdev->lun_handle = header->lun_handle;
1788                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1789                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1790                 break;
1791         }
1792 }
1793
1794 /**
1795  * zfcp_fsf_open_lun - open LUN
1796  * @erp_action: pointer to struct zfcp_erp_action
1797  * Returns: 0 on success, error otherwise
1798  */
1799 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1800 {
1801         struct zfcp_adapter *adapter = erp_action->adapter;
1802         struct zfcp_qdio *qdio = adapter->qdio;
1803         struct zfcp_fsf_req *req;
1804         int retval = -EIO;
1805
1806         spin_lock_irq(&qdio->req_q_lock);
1807         if (zfcp_qdio_sbal_get(qdio))
1808                 goto out;
1809
1810         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1811                                   SBAL_FLAGS0_TYPE_READ,
1812                                   adapter->pool.erp_req);
1813
1814         if (IS_ERR(req)) {
1815                 retval = PTR_ERR(req);
1816                 goto out;
1817         }
1818
1819         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1820         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1821
1822         req->qtcb->header.port_handle = erp_action->port->handle;
1823         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1824         req->handler = zfcp_fsf_open_lun_handler;
1825         req->data = erp_action->sdev;
1826         req->erp_action = erp_action;
1827         erp_action->fsf_req_id = req->req_id;
1828
1829         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1830                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1831
1832         zfcp_fsf_start_erp_timer(req);
1833         retval = zfcp_fsf_req_send(req);
1834         if (retval) {
1835                 zfcp_fsf_req_free(req);
1836                 erp_action->fsf_req_id = 0;
1837         }
1838 out:
1839         spin_unlock_irq(&qdio->req_q_lock);
1840         return retval;
1841 }
1842
1843 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1844 {
1845         struct scsi_device *sdev = req->data;
1846         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1847
1848         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1849                 return;
1850
1851         switch (req->qtcb->header.fsf_status) {
1852         case FSF_PORT_HANDLE_NOT_VALID:
1853                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1854                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1855                 break;
1856         case FSF_LUN_HANDLE_NOT_VALID:
1857                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1858                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1859                 break;
1860         case FSF_PORT_BOXED:
1861                 zfcp_erp_set_port_status(zfcp_sdev->port,
1862                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1863                 zfcp_erp_port_reopen(zfcp_sdev->port,
1864                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1865                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1866                 break;
1867         case FSF_ADAPTER_STATUS_AVAILABLE:
1868                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1869                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1870                         zfcp_fc_test_link(zfcp_sdev->port);
1871                         /* fall through */
1872                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1873                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1874                         break;
1875                 }
1876                 break;
1877         case FSF_GOOD:
1878                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1879                 break;
1880         }
1881 }
1882
1883 /**
1884  * zfcp_fsf_close_LUN - close LUN
1885  * @erp_action: pointer to erp_action triggering the "close LUN"
1886  * Returns: 0 on success, error otherwise
1887  */
1888 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1889 {
1890         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1891         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1892         struct zfcp_fsf_req *req;
1893         int retval = -EIO;
1894
1895         spin_lock_irq(&qdio->req_q_lock);
1896         if (zfcp_qdio_sbal_get(qdio))
1897                 goto out;
1898
1899         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1900                                   SBAL_FLAGS0_TYPE_READ,
1901                                   qdio->adapter->pool.erp_req);
1902
1903         if (IS_ERR(req)) {
1904                 retval = PTR_ERR(req);
1905                 goto out;
1906         }
1907
1908         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1909         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1910
1911         req->qtcb->header.port_handle = erp_action->port->handle;
1912         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1913         req->handler = zfcp_fsf_close_lun_handler;
1914         req->data = erp_action->sdev;
1915         req->erp_action = erp_action;
1916         erp_action->fsf_req_id = req->req_id;
1917
1918         zfcp_fsf_start_erp_timer(req);
1919         retval = zfcp_fsf_req_send(req);
1920         if (retval) {
1921                 zfcp_fsf_req_free(req);
1922                 erp_action->fsf_req_id = 0;
1923         }
1924 out:
1925         spin_unlock_irq(&qdio->req_q_lock);
1926         return retval;
1927 }
1928
1929 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1930 {
1931         lat_rec->sum += lat;
1932         lat_rec->min = min(lat_rec->min, lat);
1933         lat_rec->max = max(lat_rec->max, lat);
1934 }
1935
1936 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1937 {
1938         struct fsf_qual_latency_info *lat_in;
1939         struct latency_cont *lat = NULL;
1940         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scsi->device);
1941         struct zfcp_blk_drv_data blktrc;
1942         int ticks = req->adapter->timer_ticks;
1943
1944         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1945
1946         blktrc.flags = 0;
1947         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1948         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1949                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1950         blktrc.inb_usage = 0;
1951         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1952
1953         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1954             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1955                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1956                 blktrc.channel_lat = lat_in->channel_lat * ticks;
1957                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1958
1959                 switch (req->qtcb->bottom.io.data_direction) {
1960                 case FSF_DATADIR_DIF_READ_STRIP:
1961                 case FSF_DATADIR_DIF_READ_CONVERT:
1962                 case FSF_DATADIR_READ:
1963                         lat = &zfcp_sdev->latencies.read;
1964                         break;
1965                 case FSF_DATADIR_DIF_WRITE_INSERT:
1966                 case FSF_DATADIR_DIF_WRITE_CONVERT:
1967                 case FSF_DATADIR_WRITE:
1968                         lat = &zfcp_sdev->latencies.write;
1969                         break;
1970                 case FSF_DATADIR_CMND:
1971                         lat = &zfcp_sdev->latencies.cmd;
1972                         break;
1973                 }
1974
1975                 if (lat) {
1976                         spin_lock(&zfcp_sdev->latencies.lock);
1977                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
1978                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
1979                         lat->counter++;
1980                         spin_unlock(&zfcp_sdev->latencies.lock);
1981                 }
1982         }
1983
1984         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
1985                             sizeof(blktrc));
1986 }
1987
1988 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
1989 {
1990         struct scsi_cmnd *scmnd = req->data;
1991         struct scsi_device *sdev = scmnd->device;
1992         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1993         struct fsf_qtcb_header *header = &req->qtcb->header;
1994
1995         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1996                 return;
1997
1998         switch (header->fsf_status) {
1999         case FSF_HANDLE_MISMATCH:
2000         case FSF_PORT_HANDLE_NOT_VALID:
2001                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2002                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2003                 break;
2004         case FSF_FCPLUN_NOT_VALID:
2005         case FSF_LUN_HANDLE_NOT_VALID:
2006                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2007                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2008                 break;
2009         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2010                 zfcp_fsf_class_not_supp(req);
2011                 break;
2012         case FSF_ACCESS_DENIED:
2013                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2014                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2015                 break;
2016         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2017                 dev_err(&req->adapter->ccw_device->dev,
2018                         "Incorrect direction %d, LUN 0x%016Lx on port "
2019                         "0x%016Lx closed\n",
2020                         req->qtcb->bottom.io.data_direction,
2021                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2022                         (unsigned long long)zfcp_sdev->port->wwpn);
2023                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2024                                           "fssfch3");
2025                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2026                 break;
2027         case FSF_CMND_LENGTH_NOT_VALID:
2028                 dev_err(&req->adapter->ccw_device->dev,
2029                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2030                         "port 0x%016Lx closed\n",
2031                         req->qtcb->bottom.io.fcp_cmnd_length,
2032                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2033                         (unsigned long long)zfcp_sdev->port->wwpn);
2034                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2035                                           "fssfch4");
2036                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2037                 break;
2038         case FSF_PORT_BOXED:
2039                 zfcp_erp_set_port_status(zfcp_sdev->port,
2040                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2041                 zfcp_erp_port_reopen(zfcp_sdev->port,
2042                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2043                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2044                 break;
2045         case FSF_LUN_BOXED:
2046                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2047                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2048                                     "fssfch6");
2049                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2050                 break;
2051         case FSF_ADAPTER_STATUS_AVAILABLE:
2052                 if (header->fsf_status_qual.word[0] ==
2053                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2054                         zfcp_fc_test_link(zfcp_sdev->port);
2055                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2056                 break;
2057         }
2058 }
2059
2060 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2061 {
2062         struct scsi_cmnd *scpnt;
2063         struct fcp_resp_with_ext *fcp_rsp;
2064         unsigned long flags;
2065
2066         read_lock_irqsave(&req->adapter->abort_lock, flags);
2067
2068         scpnt = req->data;
2069         if (unlikely(!scpnt)) {
2070                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2071                 return;
2072         }
2073
2074         zfcp_fsf_fcp_handler_common(req);
2075
2076         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2077                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2078                 goto skip_fsfstatus;
2079         }
2080
2081         switch (req->qtcb->header.fsf_status) {
2082         case FSF_INCONSISTENT_PROT_DATA:
2083         case FSF_INVALID_PROT_PARM:
2084                 set_host_byte(scpnt, DID_ERROR);
2085                 goto skip_fsfstatus;
2086         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2087                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2088                 goto skip_fsfstatus;
2089         case FSF_APP_TAG_CHECK_FAILURE:
2090                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2091                 goto skip_fsfstatus;
2092         case FSF_REF_TAG_CHECK_FAILURE:
2093                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2094                 goto skip_fsfstatus;
2095         }
2096         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2097         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2098
2099 skip_fsfstatus:
2100         zfcp_fsf_req_trace(req, scpnt);
2101         zfcp_dbf_scsi_result(scpnt, req);
2102
2103         scpnt->host_scribble = NULL;
2104         (scpnt->scsi_done) (scpnt);
2105         /*
2106          * We must hold this lock until scsi_done has been called.
2107          * Otherwise we may call scsi_done after abort regarding this
2108          * command has completed.
2109          * Note: scsi_done must not block!
2110          */
2111         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2112 }
2113
2114 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2115 {
2116         switch (scsi_get_prot_op(scsi_cmnd)) {
2117         case SCSI_PROT_NORMAL:
2118                 switch (scsi_cmnd->sc_data_direction) {
2119                 case DMA_NONE:
2120                         *data_dir = FSF_DATADIR_CMND;
2121                         break;
2122                 case DMA_FROM_DEVICE:
2123                         *data_dir = FSF_DATADIR_READ;
2124                         break;
2125                 case DMA_TO_DEVICE:
2126                         *data_dir = FSF_DATADIR_WRITE;
2127                         break;
2128                 case DMA_BIDIRECTIONAL:
2129                         return -EINVAL;
2130                 }
2131                 break;
2132
2133         case SCSI_PROT_READ_STRIP:
2134                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2135                 break;
2136         case SCSI_PROT_WRITE_INSERT:
2137                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2138                 break;
2139         case SCSI_PROT_READ_PASS:
2140                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2141                 break;
2142         case SCSI_PROT_WRITE_PASS:
2143                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2144                 break;
2145         default:
2146                 return -EINVAL;
2147         }
2148
2149         return 0;
2150 }
2151
2152 /**
2153  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2154  * @scsi_cmnd: scsi command to be sent
2155  */
2156 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2157 {
2158         struct zfcp_fsf_req *req;
2159         struct fcp_cmnd *fcp_cmnd;
2160         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2161         int real_bytes, retval = -EIO, dix_bytes = 0;
2162         struct scsi_device *sdev = scsi_cmnd->device;
2163         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2164         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2165         struct zfcp_qdio *qdio = adapter->qdio;
2166         struct fsf_qtcb_bottom_io *io;
2167         unsigned long flags;
2168
2169         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2170                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2171                 return -EBUSY;
2172
2173         spin_lock_irqsave(&qdio->req_q_lock, flags);
2174         if (atomic_read(&qdio->req_q_free) <= 0) {
2175                 atomic_inc(&qdio->req_q_full);
2176                 goto out;
2177         }
2178
2179         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2180                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2181
2182         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2183                                   sbtype, adapter->pool.scsi_req);
2184
2185         if (IS_ERR(req)) {
2186                 retval = PTR_ERR(req);
2187                 goto out;
2188         }
2189
2190         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2191
2192         io = &req->qtcb->bottom.io;
2193         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2194         req->data = scsi_cmnd;
2195         req->handler = zfcp_fsf_fcp_cmnd_handler;
2196         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2197         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2198         io->service_class = FSF_CLASS_3;
2199         io->fcp_cmnd_length = FCP_CMND_LEN;
2200
2201         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2202                 io->data_block_length = scsi_cmnd->device->sector_size;
2203                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2204         }
2205
2206         zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction);
2207
2208         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2209         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2210
2211         if (scsi_prot_sg_count(scsi_cmnd)) {
2212                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2213                                        scsi_prot_sg_count(scsi_cmnd));
2214                 dix_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2215                                                 scsi_prot_sglist(scsi_cmnd));
2216                 io->prot_data_length = dix_bytes;
2217         }
2218
2219         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2220                                              scsi_sglist(scsi_cmnd));
2221
2222         if (unlikely(real_bytes < 0) || unlikely(dix_bytes < 0))
2223                 goto failed_scsi_cmnd;
2224
2225         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2226
2227         retval = zfcp_fsf_req_send(req);
2228         if (unlikely(retval))
2229                 goto failed_scsi_cmnd;
2230
2231         goto out;
2232
2233 failed_scsi_cmnd:
2234         zfcp_fsf_req_free(req);
2235         scsi_cmnd->host_scribble = NULL;
2236 out:
2237         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2238         return retval;
2239 }
2240
2241 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2242 {
2243         struct fcp_resp_with_ext *fcp_rsp;
2244         struct fcp_resp_rsp_info *rsp_info;
2245
2246         zfcp_fsf_fcp_handler_common(req);
2247
2248         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2249         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2250
2251         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2252              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2253                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2254 }
2255
2256 /**
2257  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2258  * @scmnd: SCSI command to send the task management command for
2259  * @tm_flags: unsigned byte for task management flags
2260  * Returns: on success pointer to struct fsf_req, NULL otherwise
2261  */
2262 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2263                                             u8 tm_flags)
2264 {
2265         struct zfcp_fsf_req *req = NULL;
2266         struct fcp_cmnd *fcp_cmnd;
2267         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2268         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2269
2270         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2271                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2272                 return NULL;
2273
2274         spin_lock_irq(&qdio->req_q_lock);
2275         if (zfcp_qdio_sbal_get(qdio))
2276                 goto out;
2277
2278         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2279                                   SBAL_FLAGS0_TYPE_WRITE,
2280                                   qdio->adapter->pool.scsi_req);
2281
2282         if (IS_ERR(req)) {
2283                 req = NULL;
2284                 goto out;
2285         }
2286
2287         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2288         req->data = scmnd;
2289         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2290         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2291         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2292         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2293         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2294         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2295
2296         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2297
2298         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2299         zfcp_fc_fcp_tm(fcp_cmnd, scmnd->device, tm_flags);
2300
2301         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2302         if (!zfcp_fsf_req_send(req))
2303                 goto out;
2304
2305         zfcp_fsf_req_free(req);
2306         req = NULL;
2307 out:
2308         spin_unlock_irq(&qdio->req_q_lock);
2309         return req;
2310 }
2311
2312 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2313 {
2314 }
2315
2316 /**
2317  * zfcp_fsf_control_file - control file upload/download
2318  * @adapter: pointer to struct zfcp_adapter
2319  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2320  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2321  */
2322 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2323                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2324 {
2325         struct zfcp_qdio *qdio = adapter->qdio;
2326         struct zfcp_fsf_req *req = NULL;
2327         struct fsf_qtcb_bottom_support *bottom;
2328         int direction, retval = -EIO, bytes;
2329
2330         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2331                 return ERR_PTR(-EOPNOTSUPP);
2332
2333         switch (fsf_cfdc->command) {
2334         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2335                 direction = SBAL_FLAGS0_TYPE_WRITE;
2336                 break;
2337         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2338                 direction = SBAL_FLAGS0_TYPE_READ;
2339                 break;
2340         default:
2341                 return ERR_PTR(-EINVAL);
2342         }
2343
2344         spin_lock_irq(&qdio->req_q_lock);
2345         if (zfcp_qdio_sbal_get(qdio))
2346                 goto out;
2347
2348         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2349         if (IS_ERR(req)) {
2350                 retval = -EPERM;
2351                 goto out;
2352         }
2353
2354         req->handler = zfcp_fsf_control_file_handler;
2355
2356         bottom = &req->qtcb->bottom.support;
2357         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2358         bottom->option = fsf_cfdc->option;
2359
2360         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2361
2362         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2363                 zfcp_fsf_req_free(req);
2364                 goto out;
2365         }
2366         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2367
2368         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2369         retval = zfcp_fsf_req_send(req);
2370 out:
2371         spin_unlock_irq(&qdio->req_q_lock);
2372
2373         if (!retval) {
2374                 wait_for_completion(&req->completion);
2375                 return req;
2376         }
2377         return ERR_PTR(retval);
2378 }
2379
2380 /**
2381  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2382  * @adapter: pointer to struct zfcp_adapter
2383  * @sbal_idx: response queue index of SBAL to be processed
2384  */
2385 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2386 {
2387         struct zfcp_adapter *adapter = qdio->adapter;
2388         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2389         struct qdio_buffer_element *sbale;
2390         struct zfcp_fsf_req *fsf_req;
2391         unsigned long req_id;
2392         int idx;
2393
2394         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2395
2396                 sbale = &sbal->element[idx];
2397                 req_id = (unsigned long) sbale->addr;
2398                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2399
2400                 if (!fsf_req) {
2401                         /*
2402                          * Unknown request means that we have potentially memory
2403                          * corruption and must stop the machine immediately.
2404                          */
2405                         zfcp_qdio_siosl(adapter);
2406                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2407                               req_id, dev_name(&adapter->ccw_device->dev));
2408                 }
2409
2410                 fsf_req->qdio_req.sbal_response = sbal_idx;
2411                 zfcp_fsf_req_complete(fsf_req);
2412
2413                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2414                         break;
2415         }
2416 }
2417
2418 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2419                                       struct qdio_buffer *sbal)
2420 {
2421         struct qdio_buffer_element *sbale = &sbal->element[0];
2422         u64 req_id = (unsigned long) sbale->addr;
2423
2424         return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2425 }