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 struct kmem_cache *zfcp_fsf_qtcb_cache;
  22
  23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  24 {
  25         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  26         zfcp_qdio_siosl(adapter);
  27         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  28                                 "fsrth_1");
  29 }
  30
  31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  32                                  unsigned long timeout)
  33 {
  34         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  35         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  36         fsf_req->timer.expires = jiffies + timeout;
  37         add_timer(&fsf_req->timer);
  38 }
  39
  40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  41 {
  42         BUG_ON(!fsf_req->erp_action);
  43         fsf_req->timer.function = zfcp_erp_timeout_handler;
  44         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  45         fsf_req->timer.expires = jiffies + 30 * HZ;
  46         add_timer(&fsf_req->timer);
  47 }
  48
  49 /* association between FSF command and FSF QTCB type */
  50 static u32 fsf_qtcb_type[] = {
  51         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  52         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  56         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  61         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  62         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  63         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  64 };
  65
  66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  67 {
  68         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  69                 "operational because of an unsupported FC class\n");
  70         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  71         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  72 }
  73
  74 /**
  75  * zfcp_fsf_req_free - free memory used by fsf request
  76  * @fsf_req: pointer to struct zfcp_fsf_req
  77  */
  78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  79 {
  80         if (likely(req->pool)) {
  81                 if (likely(req->qtcb))
  82                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  83                 mempool_free(req, req->pool);
  84                 return;
  85         }
  86
  87         if (likely(req->qtcb))
  88                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  89         kfree(req);
  90 }
  91
  92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  93 {
  94         unsigned long flags;
  95         struct fsf_status_read_buffer *sr_buf = req->data;
  96         struct zfcp_adapter *adapter = req->adapter;
  97         struct zfcp_port *port;
  98         int d_id = ntoh24(sr_buf->d_id);
  99
 100         read_lock_irqsave(&adapter->port_list_lock, flags);
 101         list_for_each_entry(port, &adapter->port_list, list)
 102                 if (port->d_id == d_id) {
 103                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 104                         break;
 105                 }
 106         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 107 }
 108
 109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 110                                          struct fsf_link_down_info *link_down)
 111 {
 112         struct zfcp_adapter *adapter = req->adapter;
 113
 114         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 115                 return;
 116
 117         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 118
 119         zfcp_scsi_schedule_rports_block(adapter);
 120
 121         if (!link_down)
 122                 goto out;
 123
 124         switch (link_down->error_code) {
 125         case FSF_PSQ_LINK_NO_LIGHT:
 126                 dev_warn(&req->adapter->ccw_device->dev,
 127                          "There is no light signal from the local "
 128                          "fibre channel cable\n");
 129                 break;
 130         case FSF_PSQ_LINK_WRAP_PLUG:
 131                 dev_warn(&req->adapter->ccw_device->dev,
 132                          "There is a wrap plug instead of a fibre "
 133                          "channel cable\n");
 134                 break;
 135         case FSF_PSQ_LINK_NO_FCP:
 136                 dev_warn(&req->adapter->ccw_device->dev,
 137                          "The adjacent fibre channel node does not "
 138                          "support FCP\n");
 139                 break;
 140         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 141                 dev_warn(&req->adapter->ccw_device->dev,
 142                          "The FCP device is suspended because of a "
 143                          "firmware update\n");
 144                 break;
 145         case FSF_PSQ_LINK_INVALID_WWPN:
 146                 dev_warn(&req->adapter->ccw_device->dev,
 147                          "The FCP device detected a WWPN that is "
 148                          "duplicate or not valid\n");
 149                 break;
 150         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 151                 dev_warn(&req->adapter->ccw_device->dev,
 152                          "The fibre channel fabric does not support NPIV\n");
 153                 break;
 154         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 155                 dev_warn(&req->adapter->ccw_device->dev,
 156                          "The FCP adapter cannot support more NPIV ports\n");
 157                 break;
 158         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 159                 dev_warn(&req->adapter->ccw_device->dev,
 160                          "The adjacent switch cannot support "
 161                          "more NPIV ports\n");
 162                 break;
 163         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "The FCP adapter could not log in to the "
 166                          "fibre channel fabric\n");
 167                 break;
 168         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The WWPN assignment file on the FCP adapter "
 171                          "has been damaged\n");
 172                 break;
 173         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The mode table on the FCP adapter "
 176                          "has been damaged\n");
 177                 break;
 178         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "All NPIV ports on the FCP adapter have "
 181                          "been assigned\n");
 182                 break;
 183         default:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "The link between the FCP adapter and "
 186                          "the FC fabric is down\n");
 187         }
 188 out:
 189         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 190 }
 191
 192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 193 {
 194         struct fsf_status_read_buffer *sr_buf = req->data;
 195         struct fsf_link_down_info *ldi =
 196                 (struct fsf_link_down_info *) &sr_buf->payload;
 197
 198         switch (sr_buf->status_subtype) {
 199         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 200                 zfcp_fsf_link_down_info_eval(req, ldi);
 201                 break;
 202         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 203                 zfcp_fsf_link_down_info_eval(req, ldi);
 204                 break;
 205         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 206                 zfcp_fsf_link_down_info_eval(req, NULL);
 207         };
 208 }
 209
 210 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 211 {
 212         struct zfcp_adapter *adapter = req->adapter;
 213         struct fsf_status_read_buffer *sr_buf = req->data;
 214
 215         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 216                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 217                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 218                 zfcp_fsf_req_free(req);
 219                 return;
 220         }
 221
 222         zfcp_dbf_hba_fsf_uss("fssrh_2", req);
 223
 224         switch (sr_buf->status_type) {
 225         case FSF_STATUS_READ_PORT_CLOSED:
 226                 zfcp_fsf_status_read_port_closed(req);
 227                 break;
 228         case FSF_STATUS_READ_INCOMING_ELS:
 229                 zfcp_fc_incoming_els(req);
 230                 break;
 231         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 232                 break;
 233         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 234                 dev_warn(&adapter->ccw_device->dev,
 235                          "The error threshold for checksum statistics "
 236                          "has been exceeded\n");
 237                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 238                 break;
 239         case FSF_STATUS_READ_LINK_DOWN:
 240                 zfcp_fsf_status_read_link_down(req);
 241                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 242                 break;
 243         case FSF_STATUS_READ_LINK_UP:
 244                 dev_info(&adapter->ccw_device->dev,
 245                          "The local link has been restored\n");
 246                 /* All ports should be marked as ready to run again */
 247                 zfcp_erp_set_adapter_status(adapter,
 248                                             ZFCP_STATUS_COMMON_RUNNING);
 249                 zfcp_erp_adapter_reopen(adapter,
 250                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 251                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 252                                         "fssrh_2");
 253                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 254
 255                 break;
 256         case FSF_STATUS_READ_NOTIFICATION_LOST:
 257                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 258                         zfcp_cfdc_adapter_access_changed(adapter);
 259                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 260                         queue_work(adapter->work_queue, &adapter->scan_work);
 261                 break;
 262         case FSF_STATUS_READ_CFDC_UPDATED:
 263                 zfcp_cfdc_adapter_access_changed(adapter);
 264                 break;
 265         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 266                 adapter->adapter_features = sr_buf->payload.word[0];
 267                 break;
 268         }
 269
 270         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 271         zfcp_fsf_req_free(req);
 272
 273         atomic_inc(&adapter->stat_miss);
 274         queue_work(adapter->work_queue, &adapter->stat_work);
 275 }
 276
 277 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 278 {
 279         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 280         case FSF_SQ_FCP_RSP_AVAILABLE:
 281         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 282         case FSF_SQ_NO_RETRY_POSSIBLE:
 283         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 284                 return;
 285         case FSF_SQ_COMMAND_ABORTED:
 286                 break;
 287         case FSF_SQ_NO_RECOM:
 288                 dev_err(&req->adapter->ccw_device->dev,
 289                         "The FCP adapter reported a problem "
 290                         "that cannot be recovered\n");
 291                 zfcp_qdio_siosl(req->adapter);
 292                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 293                 break;
 294         }
 295         /* all non-return stats set FSFREQ_ERROR*/
 296         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 297 }
 298
 299 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 300 {
 301         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 302                 return;
 303
 304         switch (req->qtcb->header.fsf_status) {
 305         case FSF_UNKNOWN_COMMAND:
 306                 dev_err(&req->adapter->ccw_device->dev,
 307                         "The FCP adapter does not recognize the command 0x%x\n",
 308                         req->qtcb->header.fsf_command);
 309                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 310                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 311                 break;
 312         case FSF_ADAPTER_STATUS_AVAILABLE:
 313                 zfcp_fsf_fsfstatus_qual_eval(req);
 314                 break;
 315         }
 316 }
 317
 318 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 319 {
 320         struct zfcp_adapter *adapter = req->adapter;
 321         struct fsf_qtcb *qtcb = req->qtcb;
 322         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 323
 324         zfcp_dbf_hba_fsf_response(req);
 325
 326         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 327                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 328                 return;
 329         }
 330
 331         switch (qtcb->prefix.prot_status) {
 332         case FSF_PROT_GOOD:
 333         case FSF_PROT_FSF_STATUS_PRESENTED:
 334                 return;
 335         case FSF_PROT_QTCB_VERSION_ERROR:
 336                 dev_err(&adapter->ccw_device->dev,
 337                         "QTCB version 0x%x not supported by FCP adapter "
 338                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 339                         psq->word[0], psq->word[1]);
 340                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 341                 break;
 342         case FSF_PROT_ERROR_STATE:
 343         case FSF_PROT_SEQ_NUMB_ERROR:
 344                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 345                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 346                 break;
 347         case FSF_PROT_UNSUPP_QTCB_TYPE:
 348                 dev_err(&adapter->ccw_device->dev,
 349                         "The QTCB type is not supported by the FCP adapter\n");
 350                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 351                 break;
 352         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 353                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 354                                 &adapter->status);
 355                 break;
 356         case FSF_PROT_DUPLICATE_REQUEST_ID:
 357                 dev_err(&adapter->ccw_device->dev,
 358                         "0x%Lx is an ambiguous request identifier\n",
 359                         (unsigned long long)qtcb->bottom.support.req_handle);
 360                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 361                 break;
 362         case FSF_PROT_LINK_DOWN:
 363                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 364                 /* go through reopen to flush pending requests */
 365                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 366                 break;
 367         case FSF_PROT_REEST_QUEUE:
 368                 /* All ports should be marked as ready to run again */
 369                 zfcp_erp_set_adapter_status(adapter,
 370                                             ZFCP_STATUS_COMMON_RUNNING);
 371                 zfcp_erp_adapter_reopen(adapter,
 372                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 373                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 374                                         "fspse_8");
 375                 break;
 376         default:
 377                 dev_err(&adapter->ccw_device->dev,
 378                         "0x%x is not a valid transfer protocol status\n",
 379                         qtcb->prefix.prot_status);
 380                 zfcp_qdio_siosl(adapter);
 381                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 382         }
 383         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 384 }
 385
 386 /**
 387  * zfcp_fsf_req_complete - process completion of a FSF request
 388  * @fsf_req: The FSF request that has been completed.
 389  *
 390  * When a request has been completed either from the FCP adapter,
 391  * or it has been dismissed due to a queue shutdown, this function
 392  * is called to process the completion status and trigger further
 393  * events related to the FSF request.
 394  */
 395 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 396 {
 397         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 398                 zfcp_fsf_status_read_handler(req);
 399                 return;
 400         }
 401
 402         del_timer(&req->timer);
 403         zfcp_fsf_protstatus_eval(req);
 404         zfcp_fsf_fsfstatus_eval(req);
 405         req->handler(req);
 406
 407         if (req->erp_action)
 408                 zfcp_erp_notify(req->erp_action, 0);
 409
 410         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 411                 zfcp_fsf_req_free(req);
 412         else
 413                 complete(&req->completion);
 414 }
 415
 416 /**
 417  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 418  * @adapter: pointer to struct zfcp_adapter
 419  *
 420  * Never ever call this without shutting down the adapter first.
 421  * Otherwise the adapter would continue using and corrupting s390 storage.
 422  * Included BUG_ON() call to ensure this is done.
 423  * ERP is supposed to be the only user of this function.
 424  */
 425 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 426 {
 427         struct zfcp_fsf_req *req, *tmp;
 428         LIST_HEAD(remove_queue);
 429
 430         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 431         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 432
 433         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 434                 list_del(&req->list);
 435                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 436                 zfcp_fsf_req_complete(req);
 437         }
 438 }
 439
 440 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 441 {
 442         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 443         struct zfcp_adapter *adapter = req->adapter;
 444         struct Scsi_Host *shost = adapter->scsi_host;
 445         struct fc_els_flogi *nsp, *plogi;
 446
 447         /* adjust pointers for missing command code */
 448         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 449                                         - sizeof(u32));
 450         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 451                                         - sizeof(u32));
 452
 453         if (req->data)
 454                 memcpy(req->data, bottom, sizeof(*bottom));
 455
 456         fc_host_port_name(shost) = nsp->fl_wwpn;
 457         fc_host_node_name(shost) = nsp->fl_wwnn;
 458         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 459         fc_host_speed(shost) = bottom->fc_link_speed;
 460         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 461
 462         adapter->hydra_version = bottom->adapter_type;
 463         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 464         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 465                                          (u16)FSF_STATUS_READS_RECOM);
 466
 467         if (fc_host_permanent_port_name(shost) == -1)
 468                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 469
 470         switch (bottom->fc_topology) {
 471         case FSF_TOPO_P2P:
 472                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 473                 adapter->peer_wwpn = plogi->fl_wwpn;
 474                 adapter->peer_wwnn = plogi->fl_wwnn;
 475                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 476                 break;
 477         case FSF_TOPO_FABRIC:
 478                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 479                 break;
 480         case FSF_TOPO_AL:
 481                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 482                 /* fall through */
 483         default:
 484                 dev_err(&adapter->ccw_device->dev,
 485                         "Unknown or unsupported arbitrated loop "
 486                         "fibre channel topology detected\n");
 487                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 488                 return -EIO;
 489         }
 490
 491         zfcp_scsi_set_prot(adapter);
 492
 493         return 0;
 494 }
 495
 496 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 497 {
 498         struct zfcp_adapter *adapter = req->adapter;
 499         struct fsf_qtcb *qtcb = req->qtcb;
 500         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 501         struct Scsi_Host *shost = adapter->scsi_host;
 502
 503         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 504                 return;
 505
 506         adapter->fsf_lic_version = bottom->lic_version;
 507         adapter->adapter_features = bottom->adapter_features;
 508         adapter->connection_features = bottom->connection_features;
 509         adapter->peer_wwpn = 0;
 510         adapter->peer_wwnn = 0;
 511         adapter->peer_d_id = 0;
 512
 513         switch (qtcb->header.fsf_status) {
 514         case FSF_GOOD:
 515                 if (zfcp_fsf_exchange_config_evaluate(req))
 516                         return;
 517
 518                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 519                         dev_err(&adapter->ccw_device->dev,
 520                                 "FCP adapter maximum QTCB size (%d bytes) "
 521                                 "is too small\n",
 522                                 bottom->max_qtcb_size);
 523                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 524                         return;
 525                 }
 526                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 527                                 &adapter->status);
 528                 break;
 529         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 530                 fc_host_node_name(shost) = 0;
 531                 fc_host_port_name(shost) = 0;
 532                 fc_host_port_id(shost) = 0;
 533                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 534                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 535                 adapter->hydra_version = 0;
 536
 537                 zfcp_fsf_link_down_info_eval(req,
 538                         &qtcb->header.fsf_status_qual.link_down_info);
 539                 break;
 540         default:
 541                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 542                 return;
 543         }
 544
 545         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 546                 adapter->hardware_version = bottom->hardware_version;
 547                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 548                        min(FC_SERIAL_NUMBER_SIZE, 17));
 549                 EBCASC(fc_host_serial_number(shost),
 550                        min(FC_SERIAL_NUMBER_SIZE, 17));
 551         }
 552
 553         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 554                 dev_err(&adapter->ccw_device->dev,
 555                         "The FCP adapter only supports newer "
 556                         "control block versions\n");
 557                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 558                 return;
 559         }
 560         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 561                 dev_err(&adapter->ccw_device->dev,
 562                         "The FCP adapter only supports older "
 563                         "control block versions\n");
 564                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 565         }
 566 }
 567
 568 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 569 {
 570         struct zfcp_adapter *adapter = req->adapter;
 571         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 572         struct Scsi_Host *shost = adapter->scsi_host;
 573
 574         if (req->data)
 575                 memcpy(req->data, bottom, sizeof(*bottom));
 576
 577         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 578                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 579                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 580         } else
 581                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 582         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 583         fc_host_supported_speeds(shost) = bottom->supported_speed;
 584         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 585                FC_FC4_LIST_SIZE);
 586         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 587                FC_FC4_LIST_SIZE);
 588 }
 589
 590 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 591 {
 592         struct fsf_qtcb *qtcb = req->qtcb;
 593
 594         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 595                 return;
 596
 597         switch (qtcb->header.fsf_status) {
 598         case FSF_GOOD:
 599                 zfcp_fsf_exchange_port_evaluate(req);
 600                 break;
 601         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 602                 zfcp_fsf_exchange_port_evaluate(req);
 603                 zfcp_fsf_link_down_info_eval(req,
 604                         &qtcb->header.fsf_status_qual.link_down_info);
 605                 break;
 606         }
 607 }
 608
 609 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 610 {
 611         struct zfcp_fsf_req *req;
 612
 613         if (likely(pool))
 614                 req = mempool_alloc(pool, GFP_ATOMIC);
 615         else
 616                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 617
 618         if (unlikely(!req))
 619                 return NULL;
 620
 621         memset(req, 0, sizeof(*req));
 622         req->pool = pool;
 623         return req;
 624 }
 625
 626 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 627 {
 628         struct fsf_qtcb *qtcb;
 629
 630         if (likely(pool))
 631                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 632         else
 633                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 634
 635         if (unlikely(!qtcb))
 636                 return NULL;
 637
 638         memset(qtcb, 0, sizeof(*qtcb));
 639         return qtcb;
 640 }
 641
 642 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 643                                                 u32 fsf_cmd, u8 sbtype,
 644                                                 mempool_t *pool)
 645 {
 646         struct zfcp_adapter *adapter = qdio->adapter;
 647         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 648
 649         if (unlikely(!req))
 650                 return ERR_PTR(-ENOMEM);
 651
 652         if (adapter->req_no == 0)
 653                 adapter->req_no++;
 654
 655         INIT_LIST_HEAD(&req->list);
 656         init_timer(&req->timer);
 657         init_completion(&req->completion);
 658
 659         req->adapter = adapter;
 660         req->fsf_command = fsf_cmd;
 661         req->req_id = adapter->req_no;
 662
 663         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 664                 if (likely(pool))
 665                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 666                 else
 667                         req->qtcb = zfcp_qtcb_alloc(NULL);
 668
 669                 if (unlikely(!req->qtcb)) {
 670                         zfcp_fsf_req_free(req);
 671                         return ERR_PTR(-ENOMEM);
 672                 }
 673
 674                 req->seq_no = adapter->fsf_req_seq_no;
 675                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 676                 req->qtcb->prefix.req_id = req->req_id;
 677                 req->qtcb->prefix.ulp_info = 26;
 678                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 679                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 680                 req->qtcb->header.req_handle = req->req_id;
 681                 req->qtcb->header.fsf_command = req->fsf_command;
 682         }
 683
 684         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 685                            req->qtcb, sizeof(struct fsf_qtcb));
 686
 687         return req;
 688 }
 689
 690 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 691 {
 692         struct zfcp_adapter *adapter = req->adapter;
 693         struct zfcp_qdio *qdio = adapter->qdio;
 694         int with_qtcb = (req->qtcb != NULL);
 695         int req_id = req->req_id;
 696
 697         zfcp_reqlist_add(adapter->req_list, req);
 698
 699         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 700         req->issued = get_clock();
 701         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 702                 del_timer(&req->timer);
 703                 /* lookup request again, list might have changed */
 704                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 705                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 706                 return -EIO;
 707         }
 708
 709         /* Don't increase for unsolicited status */
 710         if (with_qtcb)
 711                 adapter->fsf_req_seq_no++;
 712         adapter->req_no++;
 713
 714         return 0;
 715 }
 716
 717 /**
 718  * zfcp_fsf_status_read - send status read request
 719  * @adapter: pointer to struct zfcp_adapter
 720  * @req_flags: request flags
 721  * Returns: 0 on success, ERROR otherwise
 722  */
 723 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 724 {
 725         struct zfcp_adapter *adapter = qdio->adapter;
 726         struct zfcp_fsf_req *req;
 727         struct fsf_status_read_buffer *sr_buf;
 728         struct page *page;
 729         int retval = -EIO;
 730
 731         spin_lock_irq(&qdio->req_q_lock);
 732         if (zfcp_qdio_sbal_get(qdio))
 733                 goto out;
 734
 735         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
 736                                   adapter->pool.status_read_req);
 737         if (IS_ERR(req)) {
 738                 retval = PTR_ERR(req);
 739                 goto out;
 740         }
 741
 742         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 743         if (!page) {
 744                 retval = -ENOMEM;
 745                 goto failed_buf;
 746         }
 747         sr_buf = page_address(page);
 748         memset(sr_buf, 0, sizeof(*sr_buf));
 749         req->data = sr_buf;
 750
 751         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 752         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 753
 754         retval = zfcp_fsf_req_send(req);
 755         if (retval)
 756                 goto failed_req_send;
 757
 758         goto out;
 759
 760 failed_req_send:
 761         req->data = NULL;
 762         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 763 failed_buf:
 764         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 765         zfcp_fsf_req_free(req);
 766 out:
 767         spin_unlock_irq(&qdio->req_q_lock);
 768         return retval;
 769 }
 770
 771 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 772 {
 773         struct scsi_device *sdev = req->data;
 774         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 775         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 776
 777         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 778                 return;
 779
 780         switch (req->qtcb->header.fsf_status) {
 781         case FSF_PORT_HANDLE_NOT_VALID:
 782                 if (fsq->word[0] == fsq->word[1]) {
 783                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 784                                                 "fsafch1");
 785                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 786                 }
 787                 break;
 788         case FSF_LUN_HANDLE_NOT_VALID:
 789                 if (fsq->word[0] == fsq->word[1]) {
 790                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 791                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 792                 }
 793                 break;
 794         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 795                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 796                 break;
 797         case FSF_PORT_BOXED:
 798                 zfcp_erp_set_port_status(zfcp_sdev->port,
 799                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 800                 zfcp_erp_port_reopen(zfcp_sdev->port,
 801                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 802                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 803                 break;
 804         case FSF_LUN_BOXED:
 805                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 806                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 807                                     "fsafch4");
 808                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 809                 break;
 810         case FSF_ADAPTER_STATUS_AVAILABLE:
 811                 switch (fsq->word[0]) {
 812                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 813                         zfcp_fc_test_link(zfcp_sdev->port);
 814                         /* fall through */
 815                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 816                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 817                         break;
 818                 }
 819                 break;
 820         case FSF_GOOD:
 821                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 822                 break;
 823         }
 824 }
 825
 826 /**
 827  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 828  * @scmnd: The SCSI command to abort
 829  * Returns: pointer to struct zfcp_fsf_req
 830  */
 831
 832 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 833 {
 834         struct zfcp_fsf_req *req = NULL;
 835         struct scsi_device *sdev = scmnd->device;
 836         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 837         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 838         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 839
 840         spin_lock_irq(&qdio->req_q_lock);
 841         if (zfcp_qdio_sbal_get(qdio))
 842                 goto out;
 843         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 844                                   SBAL_SFLAGS0_TYPE_READ,
 845                                   qdio->adapter->pool.scsi_abort);
 846         if (IS_ERR(req)) {
 847                 req = NULL;
 848                 goto out;
 849         }
 850
 851         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 852                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 853                 goto out_error_free;
 854
 855         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 856
 857         req->data = sdev;
 858         req->handler = zfcp_fsf_abort_fcp_command_handler;
 859         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 860         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 861         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 862
 863         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 864         if (!zfcp_fsf_req_send(req))
 865                 goto out;
 866
 867 out_error_free:
 868         zfcp_fsf_req_free(req);
 869         req = NULL;
 870 out:
 871         spin_unlock_irq(&qdio->req_q_lock);
 872         return req;
 873 }
 874
 875 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 876 {
 877         struct zfcp_adapter *adapter = req->adapter;
 878         struct zfcp_fsf_ct_els *ct = req->data;
 879         struct fsf_qtcb_header *header = &req->qtcb->header;
 880
 881         ct->status = -EINVAL;
 882
 883         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 884                 goto skip_fsfstatus;
 885
 886         switch (header->fsf_status) {
 887         case FSF_GOOD:
 888                 zfcp_dbf_san_res("fsscth1", req);
 889                 ct->status = 0;
 890                 break;
 891         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 892                 zfcp_fsf_class_not_supp(req);
 893                 break;
 894         case FSF_ADAPTER_STATUS_AVAILABLE:
 895                 switch (header->fsf_status_qual.word[0]){
 896                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 897                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 898                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 899                         break;
 900                 }
 901                 break;
 902         case FSF_ACCESS_DENIED:
 903                 break;
 904         case FSF_PORT_BOXED:
 905                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 906                 break;
 907         case FSF_PORT_HANDLE_NOT_VALID:
 908                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 909                 /* fall through */
 910         case FSF_GENERIC_COMMAND_REJECTED:
 911         case FSF_PAYLOAD_SIZE_MISMATCH:
 912         case FSF_REQUEST_SIZE_TOO_LARGE:
 913         case FSF_RESPONSE_SIZE_TOO_LARGE:
 914         case FSF_SBAL_MISMATCH:
 915                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 916                 break;
 917         }
 918
 919 skip_fsfstatus:
 920         if (ct->handler)
 921                 ct->handler(ct->handler_data);
 922 }
 923
 924 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 925                                             struct zfcp_qdio_req *q_req,
 926                                             struct scatterlist *sg_req,
 927                                             struct scatterlist *sg_resp)
 928 {
 929         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 930         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 931         zfcp_qdio_set_sbale_last(qdio, q_req);
 932 }
 933
 934 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 935                                        struct scatterlist *sg_req,
 936                                        struct scatterlist *sg_resp)
 937 {
 938         struct zfcp_adapter *adapter = req->adapter;
 939         u32 feat = adapter->adapter_features;
 940         int bytes;
 941
 942         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
 943                 if (!zfcp_qdio_sg_one_sbale(sg_req) ||
 944                     !zfcp_qdio_sg_one_sbale(sg_resp))
 945                         return -EOPNOTSUPP;
 946
 947                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 948                                                 sg_req, sg_resp);
 949                 return 0;
 950         }
 951
 952         /* use single, unchained SBAL if it can hold the request */
 953         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 954                 zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
 955                                                 sg_req, sg_resp);
 956                 return 0;
 957         }
 958
 959         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, sg_req);
 960         if (bytes <= 0)
 961                 return -EIO;
 962         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 963         req->qtcb->bottom.support.req_buf_length = bytes;
 964         zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
 965
 966         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
 967                                         sg_resp);
 968         req->qtcb->bottom.support.resp_buf_length = bytes;
 969         if (bytes <= 0)
 970                 return -EIO;
 971         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
 972
 973         return 0;
 974 }
 975
 976 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
 977                                  struct scatterlist *sg_req,
 978                                  struct scatterlist *sg_resp,
 979                                  unsigned int timeout)
 980 {
 981         int ret;
 982
 983         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
 984         if (ret)
 985                 return ret;
 986
 987         /* common settings for ct/gs and els requests */
 988         if (timeout > 255)
 989                 timeout = 255; /* max value accepted by hardware */
 990         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
 991         req->qtcb->bottom.support.timeout = timeout;
 992         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
 993
 994         return 0;
 995 }
 996
 997 /**
 998  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
 999  * @ct: pointer to struct zfcp_send_ct with data for request
1000  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1001  */
1002 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1003                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1004                      unsigned int timeout)
1005 {
1006         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1007         struct zfcp_fsf_req *req;
1008         int ret = -EIO;
1009
1010         spin_lock_irq(&qdio->req_q_lock);
1011         if (zfcp_qdio_sbal_get(qdio))
1012                 goto out;
1013
1014         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1015                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1016
1017         if (IS_ERR(req)) {
1018                 ret = PTR_ERR(req);
1019                 goto out;
1020         }
1021
1022         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1023         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1024         if (ret)
1025                 goto failed_send;
1026
1027         req->handler = zfcp_fsf_send_ct_handler;
1028         req->qtcb->header.port_handle = wka_port->handle;
1029         req->data = ct;
1030
1031         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1032
1033         ret = zfcp_fsf_req_send(req);
1034         if (ret)
1035                 goto failed_send;
1036
1037         goto out;
1038
1039 failed_send:
1040         zfcp_fsf_req_free(req);
1041 out:
1042         spin_unlock_irq(&qdio->req_q_lock);
1043         return ret;
1044 }
1045
1046 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1047 {
1048         struct zfcp_fsf_ct_els *send_els = req->data;
1049         struct zfcp_port *port = send_els->port;
1050         struct fsf_qtcb_header *header = &req->qtcb->header;
1051
1052         send_els->status = -EINVAL;
1053
1054         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1055                 goto skip_fsfstatus;
1056
1057         switch (header->fsf_status) {
1058         case FSF_GOOD:
1059                 zfcp_dbf_san_res("fsselh1", req);
1060                 send_els->status = 0;
1061                 break;
1062         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1063                 zfcp_fsf_class_not_supp(req);
1064                 break;
1065         case FSF_ADAPTER_STATUS_AVAILABLE:
1066                 switch (header->fsf_status_qual.word[0]){
1067                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1068                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1069                 case FSF_SQ_RETRY_IF_POSSIBLE:
1070                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1071                         break;
1072                 }
1073                 break;
1074         case FSF_ELS_COMMAND_REJECTED:
1075         case FSF_PAYLOAD_SIZE_MISMATCH:
1076         case FSF_REQUEST_SIZE_TOO_LARGE:
1077         case FSF_RESPONSE_SIZE_TOO_LARGE:
1078                 break;
1079         case FSF_ACCESS_DENIED:
1080                 if (port) {
1081                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1082                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1083                 }
1084                 break;
1085         case FSF_SBAL_MISMATCH:
1086                 /* should never occur, avoided in zfcp_fsf_send_els */
1087                 /* fall through */
1088         default:
1089                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1090                 break;
1091         }
1092 skip_fsfstatus:
1093         if (send_els->handler)
1094                 send_els->handler(send_els->handler_data);
1095 }
1096
1097 /**
1098  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1099  * @els: pointer to struct zfcp_send_els with data for the command
1100  */
1101 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1102                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1103 {
1104         struct zfcp_fsf_req *req;
1105         struct zfcp_qdio *qdio = adapter->qdio;
1106         int ret = -EIO;
1107
1108         spin_lock_irq(&qdio->req_q_lock);
1109         if (zfcp_qdio_sbal_get(qdio))
1110                 goto out;
1111
1112         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1113                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1114
1115         if (IS_ERR(req)) {
1116                 ret = PTR_ERR(req);
1117                 goto out;
1118         }
1119
1120         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1121
1122         zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1123
1124         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1125
1126         if (ret)
1127                 goto failed_send;
1128
1129         hton24(req->qtcb->bottom.support.d_id, d_id);
1130         req->handler = zfcp_fsf_send_els_handler;
1131         req->data = els;
1132
1133         zfcp_dbf_san_req("fssels1", req, d_id);
1134
1135         ret = zfcp_fsf_req_send(req);
1136         if (ret)
1137                 goto failed_send;
1138
1139         goto out;
1140
1141 failed_send:
1142         zfcp_fsf_req_free(req);
1143 out:
1144         spin_unlock_irq(&qdio->req_q_lock);
1145         return ret;
1146 }
1147
1148 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1149 {
1150         struct zfcp_fsf_req *req;
1151         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1152         int retval = -EIO;
1153
1154         spin_lock_irq(&qdio->req_q_lock);
1155         if (zfcp_qdio_sbal_get(qdio))
1156                 goto out;
1157
1158         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1159                                   SBAL_SFLAGS0_TYPE_READ,
1160                                   qdio->adapter->pool.erp_req);
1161
1162         if (IS_ERR(req)) {
1163                 retval = PTR_ERR(req);
1164                 goto out;
1165         }
1166
1167         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1168         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1169
1170         req->qtcb->bottom.config.feature_selection =
1171                         FSF_FEATURE_CFDC |
1172                         FSF_FEATURE_LUN_SHARING |
1173                         FSF_FEATURE_NOTIFICATION_LOST |
1174                         FSF_FEATURE_UPDATE_ALERT;
1175         req->erp_action = erp_action;
1176         req->handler = zfcp_fsf_exchange_config_data_handler;
1177         erp_action->fsf_req_id = req->req_id;
1178
1179         zfcp_fsf_start_erp_timer(req);
1180         retval = zfcp_fsf_req_send(req);
1181         if (retval) {
1182                 zfcp_fsf_req_free(req);
1183                 erp_action->fsf_req_id = 0;
1184         }
1185 out:
1186         spin_unlock_irq(&qdio->req_q_lock);
1187         return retval;
1188 }
1189
1190 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1191                                        struct fsf_qtcb_bottom_config *data)
1192 {
1193         struct zfcp_fsf_req *req = NULL;
1194         int retval = -EIO;
1195
1196         spin_lock_irq(&qdio->req_q_lock);
1197         if (zfcp_qdio_sbal_get(qdio))
1198                 goto out_unlock;
1199
1200         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1201                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1202
1203         if (IS_ERR(req)) {
1204                 retval = PTR_ERR(req);
1205                 goto out_unlock;
1206         }
1207
1208         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1209         req->handler = zfcp_fsf_exchange_config_data_handler;
1210
1211         req->qtcb->bottom.config.feature_selection =
1212                         FSF_FEATURE_CFDC |
1213                         FSF_FEATURE_LUN_SHARING |
1214                         FSF_FEATURE_NOTIFICATION_LOST |
1215                         FSF_FEATURE_UPDATE_ALERT;
1216
1217         if (data)
1218                 req->data = data;
1219
1220         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1221         retval = zfcp_fsf_req_send(req);
1222         spin_unlock_irq(&qdio->req_q_lock);
1223         if (!retval)
1224                 wait_for_completion(&req->completion);
1225
1226         zfcp_fsf_req_free(req);
1227         return retval;
1228
1229 out_unlock:
1230         spin_unlock_irq(&qdio->req_q_lock);
1231         return retval;
1232 }
1233
1234 /**
1235  * zfcp_fsf_exchange_port_data - request information about local port
1236  * @erp_action: ERP action for the adapter for which port data is requested
1237  * Returns: 0 on success, error otherwise
1238  */
1239 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1240 {
1241         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1242         struct zfcp_fsf_req *req;
1243         int retval = -EIO;
1244
1245         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1246                 return -EOPNOTSUPP;
1247
1248         spin_lock_irq(&qdio->req_q_lock);
1249         if (zfcp_qdio_sbal_get(qdio))
1250                 goto out;
1251
1252         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1253                                   SBAL_SFLAGS0_TYPE_READ,
1254                                   qdio->adapter->pool.erp_req);
1255
1256         if (IS_ERR(req)) {
1257                 retval = PTR_ERR(req);
1258                 goto out;
1259         }
1260
1261         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1262         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1263
1264         req->handler = zfcp_fsf_exchange_port_data_handler;
1265         req->erp_action = erp_action;
1266         erp_action->fsf_req_id = req->req_id;
1267
1268         zfcp_fsf_start_erp_timer(req);
1269         retval = zfcp_fsf_req_send(req);
1270         if (retval) {
1271                 zfcp_fsf_req_free(req);
1272                 erp_action->fsf_req_id = 0;
1273         }
1274 out:
1275         spin_unlock_irq(&qdio->req_q_lock);
1276         return retval;
1277 }
1278
1279 /**
1280  * zfcp_fsf_exchange_port_data_sync - request information about local port
1281  * @qdio: pointer to struct zfcp_qdio
1282  * @data: pointer to struct fsf_qtcb_bottom_port
1283  * Returns: 0 on success, error otherwise
1284  */
1285 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1286                                      struct fsf_qtcb_bottom_port *data)
1287 {
1288         struct zfcp_fsf_req *req = NULL;
1289         int retval = -EIO;
1290
1291         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1292                 return -EOPNOTSUPP;
1293
1294         spin_lock_irq(&qdio->req_q_lock);
1295         if (zfcp_qdio_sbal_get(qdio))
1296                 goto out_unlock;
1297
1298         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1299                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1300
1301         if (IS_ERR(req)) {
1302                 retval = PTR_ERR(req);
1303                 goto out_unlock;
1304         }
1305
1306         if (data)
1307                 req->data = data;
1308
1309         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1310
1311         req->handler = zfcp_fsf_exchange_port_data_handler;
1312         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1313         retval = zfcp_fsf_req_send(req);
1314         spin_unlock_irq(&qdio->req_q_lock);
1315
1316         if (!retval)
1317                 wait_for_completion(&req->completion);
1318
1319         zfcp_fsf_req_free(req);
1320
1321         return retval;
1322
1323 out_unlock:
1324         spin_unlock_irq(&qdio->req_q_lock);
1325         return retval;
1326 }
1327
1328 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1329 {
1330         struct zfcp_port *port = req->data;
1331         struct fsf_qtcb_header *header = &req->qtcb->header;
1332         struct fc_els_flogi *plogi;
1333
1334         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1335                 goto out;
1336
1337         switch (header->fsf_status) {
1338         case FSF_PORT_ALREADY_OPEN:
1339                 break;
1340         case FSF_ACCESS_DENIED:
1341                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1342                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1343                 break;
1344         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1345                 dev_warn(&req->adapter->ccw_device->dev,
1346                          "Not enough FCP adapter resources to open "
1347                          "remote port 0x%016Lx\n",
1348                          (unsigned long long)port->wwpn);
1349                 zfcp_erp_set_port_status(port,
1350                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1351                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1352                 break;
1353         case FSF_ADAPTER_STATUS_AVAILABLE:
1354                 switch (header->fsf_status_qual.word[0]) {
1355                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1356                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1357                 case FSF_SQ_NO_RETRY_POSSIBLE:
1358                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1359                         break;
1360                 }
1361                 break;
1362         case FSF_GOOD:
1363                 port->handle = header->port_handle;
1364                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1365                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1366                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1367                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1368                                   &port->status);
1369                 /* check whether D_ID has changed during open */
1370                 /*
1371                  * FIXME: This check is not airtight, as the FCP channel does
1372                  * not monitor closures of target port connections caused on
1373                  * the remote side. Thus, they might miss out on invalidating
1374                  * locally cached WWPNs (and other N_Port parameters) of gone
1375                  * target ports. So, our heroic attempt to make things safe
1376                  * could be undermined by 'open port' response data tagged with
1377                  * obsolete WWPNs. Another reason to monitor potential
1378                  * connection closures ourself at least (by interpreting
1379                  * incoming ELS' and unsolicited status). It just crosses my
1380                  * mind that one should be able to cross-check by means of
1381                  * another GID_PN straight after a port has been opened.
1382                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1383                  */
1384                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1385                 if (req->qtcb->bottom.support.els1_length >=
1386                     FSF_PLOGI_MIN_LEN)
1387                                 zfcp_fc_plogi_evaluate(port, plogi);
1388                 break;
1389         case FSF_UNKNOWN_OP_SUBTYPE:
1390                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1391                 break;
1392         }
1393
1394 out:
1395         put_device(&port->dev);
1396 }
1397
1398 /**
1399  * zfcp_fsf_open_port - create and send open port request
1400  * @erp_action: pointer to struct zfcp_erp_action
1401  * Returns: 0 on success, error otherwise
1402  */
1403 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1404 {
1405         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1406         struct zfcp_port *port = erp_action->port;
1407         struct zfcp_fsf_req *req;
1408         int retval = -EIO;
1409
1410         spin_lock_irq(&qdio->req_q_lock);
1411         if (zfcp_qdio_sbal_get(qdio))
1412                 goto out;
1413
1414         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1415                                   SBAL_SFLAGS0_TYPE_READ,
1416                                   qdio->adapter->pool.erp_req);
1417
1418         if (IS_ERR(req)) {
1419                 retval = PTR_ERR(req);
1420                 goto out;
1421         }
1422
1423         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1424         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1425
1426         req->handler = zfcp_fsf_open_port_handler;
1427         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1428         req->data = port;
1429         req->erp_action = erp_action;
1430         erp_action->fsf_req_id = req->req_id;
1431         get_device(&port->dev);
1432
1433         zfcp_fsf_start_erp_timer(req);
1434         retval = zfcp_fsf_req_send(req);
1435         if (retval) {
1436                 zfcp_fsf_req_free(req);
1437                 erp_action->fsf_req_id = 0;
1438                 put_device(&port->dev);
1439         }
1440 out:
1441         spin_unlock_irq(&qdio->req_q_lock);
1442         return retval;
1443 }
1444
1445 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1446 {
1447         struct zfcp_port *port = req->data;
1448
1449         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1450                 return;
1451
1452         switch (req->qtcb->header.fsf_status) {
1453         case FSF_PORT_HANDLE_NOT_VALID:
1454                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1455                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1456                 break;
1457         case FSF_ADAPTER_STATUS_AVAILABLE:
1458                 break;
1459         case FSF_GOOD:
1460                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1461                 break;
1462         }
1463 }
1464
1465 /**
1466  * zfcp_fsf_close_port - create and send close port request
1467  * @erp_action: pointer to struct zfcp_erp_action
1468  * Returns: 0 on success, error otherwise
1469  */
1470 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1471 {
1472         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1473         struct zfcp_fsf_req *req;
1474         int retval = -EIO;
1475
1476         spin_lock_irq(&qdio->req_q_lock);
1477         if (zfcp_qdio_sbal_get(qdio))
1478                 goto out;
1479
1480         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1481                                   SBAL_SFLAGS0_TYPE_READ,
1482                                   qdio->adapter->pool.erp_req);
1483
1484         if (IS_ERR(req)) {
1485                 retval = PTR_ERR(req);
1486                 goto out;
1487         }
1488
1489         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1490         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1491
1492         req->handler = zfcp_fsf_close_port_handler;
1493         req->data = erp_action->port;
1494         req->erp_action = erp_action;
1495         req->qtcb->header.port_handle = erp_action->port->handle;
1496         erp_action->fsf_req_id = req->req_id;
1497
1498         zfcp_fsf_start_erp_timer(req);
1499         retval = zfcp_fsf_req_send(req);
1500         if (retval) {
1501                 zfcp_fsf_req_free(req);
1502                 erp_action->fsf_req_id = 0;
1503         }
1504 out:
1505         spin_unlock_irq(&qdio->req_q_lock);
1506         return retval;
1507 }
1508
1509 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1510 {
1511         struct zfcp_fc_wka_port *wka_port = req->data;
1512         struct fsf_qtcb_header *header = &req->qtcb->header;
1513
1514         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1515                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1516                 goto out;
1517         }
1518
1519         switch (header->fsf_status) {
1520         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1521                 dev_warn(&req->adapter->ccw_device->dev,
1522                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1523                 /* fall through */
1524         case FSF_ADAPTER_STATUS_AVAILABLE:
1525                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1526                 /* fall through */
1527         case FSF_ACCESS_DENIED:
1528                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1529                 break;
1530         case FSF_GOOD:
1531                 wka_port->handle = header->port_handle;
1532                 /* fall through */
1533         case FSF_PORT_ALREADY_OPEN:
1534                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1535         }
1536 out:
1537         wake_up(&wka_port->completion_wq);
1538 }
1539
1540 /**
1541  * zfcp_fsf_open_wka_port - create and send open wka-port request
1542  * @wka_port: pointer to struct zfcp_fc_wka_port
1543  * Returns: 0 on success, error otherwise
1544  */
1545 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1546 {
1547         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1548         struct zfcp_fsf_req *req;
1549         int retval = -EIO;
1550
1551         spin_lock_irq(&qdio->req_q_lock);
1552         if (zfcp_qdio_sbal_get(qdio))
1553                 goto out;
1554
1555         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1556                                   SBAL_SFLAGS0_TYPE_READ,
1557                                   qdio->adapter->pool.erp_req);
1558
1559         if (IS_ERR(req)) {
1560                 retval = PTR_ERR(req);
1561                 goto out;
1562         }
1563
1564         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1565         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1566
1567         req->handler = zfcp_fsf_open_wka_port_handler;
1568         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1569         req->data = wka_port;
1570
1571         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1572         retval = zfcp_fsf_req_send(req);
1573         if (retval)
1574                 zfcp_fsf_req_free(req);
1575 out:
1576         spin_unlock_irq(&qdio->req_q_lock);
1577         return retval;
1578 }
1579
1580 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1581 {
1582         struct zfcp_fc_wka_port *wka_port = req->data;
1583
1584         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1585                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1586                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1587         }
1588
1589         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1590         wake_up(&wka_port->completion_wq);
1591 }
1592
1593 /**
1594  * zfcp_fsf_close_wka_port - create and send close wka port request
1595  * @wka_port: WKA port to open
1596  * Returns: 0 on success, error otherwise
1597  */
1598 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1599 {
1600         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1601         struct zfcp_fsf_req *req;
1602         int retval = -EIO;
1603
1604         spin_lock_irq(&qdio->req_q_lock);
1605         if (zfcp_qdio_sbal_get(qdio))
1606                 goto out;
1607
1608         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1609                                   SBAL_SFLAGS0_TYPE_READ,
1610                                   qdio->adapter->pool.erp_req);
1611
1612         if (IS_ERR(req)) {
1613                 retval = PTR_ERR(req);
1614                 goto out;
1615         }
1616
1617         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1618         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1619
1620         req->handler = zfcp_fsf_close_wka_port_handler;
1621         req->data = wka_port;
1622         req->qtcb->header.port_handle = wka_port->handle;
1623
1624         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1625         retval = zfcp_fsf_req_send(req);
1626         if (retval)
1627                 zfcp_fsf_req_free(req);
1628 out:
1629         spin_unlock_irq(&qdio->req_q_lock);
1630         return retval;
1631 }
1632
1633 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1634 {
1635         struct zfcp_port *port = req->data;
1636         struct fsf_qtcb_header *header = &req->qtcb->header;
1637         struct scsi_device *sdev;
1638
1639         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1640                 return;
1641
1642         switch (header->fsf_status) {
1643         case FSF_PORT_HANDLE_NOT_VALID:
1644                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1645                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1646                 break;
1647         case FSF_ACCESS_DENIED:
1648                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1649                 break;
1650         case FSF_PORT_BOXED:
1651                 /* can't use generic zfcp_erp_modify_port_status because
1652                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1653                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1654                 shost_for_each_device(sdev, port->adapter->scsi_host)
1655                         if (sdev_to_zfcp(sdev)->port == port)
1656                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1657                                                   &sdev_to_zfcp(sdev)->status);
1658                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1659                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1660                                      "fscpph2");
1661                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1662                 break;
1663         case FSF_ADAPTER_STATUS_AVAILABLE:
1664                 switch (header->fsf_status_qual.word[0]) {
1665                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1666                         /* fall through */
1667                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1668                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1669                         break;
1670                 }
1671                 break;
1672         case FSF_GOOD:
1673                 /* can't use generic zfcp_erp_modify_port_status because
1674                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1675                  */
1676                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1677                 shost_for_each_device(sdev, port->adapter->scsi_host)
1678                         if (sdev_to_zfcp(sdev)->port == port)
1679                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1680                                                   &sdev_to_zfcp(sdev)->status);
1681                 break;
1682         }
1683 }
1684
1685 /**
1686  * zfcp_fsf_close_physical_port - close physical port
1687  * @erp_action: pointer to struct zfcp_erp_action
1688  * Returns: 0 on success
1689  */
1690 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1691 {
1692         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1693         struct zfcp_fsf_req *req;
1694         int retval = -EIO;
1695
1696         spin_lock_irq(&qdio->req_q_lock);
1697         if (zfcp_qdio_sbal_get(qdio))
1698                 goto out;
1699
1700         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1701                                   SBAL_SFLAGS0_TYPE_READ,
1702                                   qdio->adapter->pool.erp_req);
1703
1704         if (IS_ERR(req)) {
1705                 retval = PTR_ERR(req);
1706                 goto out;
1707         }
1708
1709         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1710         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1711
1712         req->data = erp_action->port;
1713         req->qtcb->header.port_handle = erp_action->port->handle;
1714         req->erp_action = erp_action;
1715         req->handler = zfcp_fsf_close_physical_port_handler;
1716         erp_action->fsf_req_id = req->req_id;
1717
1718         zfcp_fsf_start_erp_timer(req);
1719         retval = zfcp_fsf_req_send(req);
1720         if (retval) {
1721                 zfcp_fsf_req_free(req);
1722                 erp_action->fsf_req_id = 0;
1723         }
1724 out:
1725         spin_unlock_irq(&qdio->req_q_lock);
1726         return retval;
1727 }
1728
1729 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1730 {
1731         struct zfcp_adapter *adapter = req->adapter;
1732         struct scsi_device *sdev = req->data;
1733         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1734         struct fsf_qtcb_header *header = &req->qtcb->header;
1735         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1736
1737         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1738                 return;
1739
1740         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1741                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1742                           ZFCP_STATUS_LUN_SHARED |
1743                           ZFCP_STATUS_LUN_READONLY,
1744                           &zfcp_sdev->status);
1745
1746         switch (header->fsf_status) {
1747
1748         case FSF_PORT_HANDLE_NOT_VALID:
1749                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1750                 /* fall through */
1751         case FSF_LUN_ALREADY_OPEN:
1752                 break;
1753         case FSF_ACCESS_DENIED:
1754                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1755                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1756                 break;
1757         case FSF_PORT_BOXED:
1758                 zfcp_erp_set_port_status(zfcp_sdev->port,
1759                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1760                 zfcp_erp_port_reopen(zfcp_sdev->port,
1761                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1762                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1763                 break;
1764         case FSF_LUN_SHARING_VIOLATION:
1765                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1766                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1767                 break;
1768         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1769                 dev_warn(&adapter->ccw_device->dev,
1770                          "No handle is available for LUN "
1771                          "0x%016Lx on port 0x%016Lx\n",
1772                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1773                          (unsigned long long)zfcp_sdev->port->wwpn);
1774                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1775                 /* fall through */
1776         case FSF_INVALID_COMMAND_OPTION:
1777                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1778                 break;
1779         case FSF_ADAPTER_STATUS_AVAILABLE:
1780                 switch (header->fsf_status_qual.word[0]) {
1781                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1782                         zfcp_fc_test_link(zfcp_sdev->port);
1783                         /* fall through */
1784                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1785                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1786                         break;
1787                 }
1788                 break;
1789
1790         case FSF_GOOD:
1791                 zfcp_sdev->lun_handle = header->lun_handle;
1792                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1793                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1794                 break;
1795         }
1796 }
1797
1798 /**
1799  * zfcp_fsf_open_lun - open LUN
1800  * @erp_action: pointer to struct zfcp_erp_action
1801  * Returns: 0 on success, error otherwise
1802  */
1803 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1804 {
1805         struct zfcp_adapter *adapter = erp_action->adapter;
1806         struct zfcp_qdio *qdio = adapter->qdio;
1807         struct zfcp_fsf_req *req;
1808         int retval = -EIO;
1809
1810         spin_lock_irq(&qdio->req_q_lock);
1811         if (zfcp_qdio_sbal_get(qdio))
1812                 goto out;
1813
1814         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1815                                   SBAL_SFLAGS0_TYPE_READ,
1816                                   adapter->pool.erp_req);
1817
1818         if (IS_ERR(req)) {
1819                 retval = PTR_ERR(req);
1820                 goto out;
1821         }
1822
1823         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1824         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1825
1826         req->qtcb->header.port_handle = erp_action->port->handle;
1827         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1828         req->handler = zfcp_fsf_open_lun_handler;
1829         req->data = erp_action->sdev;
1830         req->erp_action = erp_action;
1831         erp_action->fsf_req_id = req->req_id;
1832
1833         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1834                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1835
1836         zfcp_fsf_start_erp_timer(req);
1837         retval = zfcp_fsf_req_send(req);
1838         if (retval) {
1839                 zfcp_fsf_req_free(req);
1840                 erp_action->fsf_req_id = 0;
1841         }
1842 out:
1843         spin_unlock_irq(&qdio->req_q_lock);
1844         return retval;
1845 }
1846
1847 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1848 {
1849         struct scsi_device *sdev = req->data;
1850         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1851
1852         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1853                 return;
1854
1855         switch (req->qtcb->header.fsf_status) {
1856         case FSF_PORT_HANDLE_NOT_VALID:
1857                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1858                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1859                 break;
1860         case FSF_LUN_HANDLE_NOT_VALID:
1861                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1862                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1863                 break;
1864         case FSF_PORT_BOXED:
1865                 zfcp_erp_set_port_status(zfcp_sdev->port,
1866                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1867                 zfcp_erp_port_reopen(zfcp_sdev->port,
1868                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1869                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1870                 break;
1871         case FSF_ADAPTER_STATUS_AVAILABLE:
1872                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1873                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1874                         zfcp_fc_test_link(zfcp_sdev->port);
1875                         /* fall through */
1876                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1877                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1878                         break;
1879                 }
1880                 break;
1881         case FSF_GOOD:
1882                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1883                 break;
1884         }
1885 }
1886
1887 /**
1888  * zfcp_fsf_close_LUN - close LUN
1889  * @erp_action: pointer to erp_action triggering the "close LUN"
1890  * Returns: 0 on success, error otherwise
1891  */
1892 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1893 {
1894         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1895         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1896         struct zfcp_fsf_req *req;
1897         int retval = -EIO;
1898
1899         spin_lock_irq(&qdio->req_q_lock);
1900         if (zfcp_qdio_sbal_get(qdio))
1901                 goto out;
1902
1903         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1904                                   SBAL_SFLAGS0_TYPE_READ,
1905                                   qdio->adapter->pool.erp_req);
1906
1907         if (IS_ERR(req)) {
1908                 retval = PTR_ERR(req);
1909                 goto out;
1910         }
1911
1912         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1913         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1914
1915         req->qtcb->header.port_handle = erp_action->port->handle;
1916         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1917         req->handler = zfcp_fsf_close_lun_handler;
1918         req->data = erp_action->sdev;
1919         req->erp_action = erp_action;
1920         erp_action->fsf_req_id = req->req_id;
1921
1922         zfcp_fsf_start_erp_timer(req);
1923         retval = zfcp_fsf_req_send(req);
1924         if (retval) {
1925                 zfcp_fsf_req_free(req);
1926                 erp_action->fsf_req_id = 0;
1927         }
1928 out:
1929         spin_unlock_irq(&qdio->req_q_lock);
1930         return retval;
1931 }
1932
1933 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1934 {
1935         lat_rec->sum += lat;
1936         lat_rec->min = min(lat_rec->min, lat);
1937         lat_rec->max = max(lat_rec->max, lat);
1938 }
1939
1940 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1941 {
1942         struct fsf_qual_latency_info *lat_in;
1943         struct latency_cont *lat = NULL;
1944         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scsi->device);
1945         struct zfcp_blk_drv_data blktrc;
1946         int ticks = req->adapter->timer_ticks;
1947
1948         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1949
1950         blktrc.flags = 0;
1951         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1952         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1953                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1954         blktrc.inb_usage = 0;
1955         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1956
1957         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1958             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1959                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1960                 blktrc.channel_lat = lat_in->channel_lat * ticks;
1961                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1962
1963                 switch (req->qtcb->bottom.io.data_direction) {
1964                 case FSF_DATADIR_DIF_READ_STRIP:
1965                 case FSF_DATADIR_DIF_READ_CONVERT:
1966                 case FSF_DATADIR_READ:
1967                         lat = &zfcp_sdev->latencies.read;
1968                         break;
1969                 case FSF_DATADIR_DIF_WRITE_INSERT:
1970                 case FSF_DATADIR_DIF_WRITE_CONVERT:
1971                 case FSF_DATADIR_WRITE:
1972                         lat = &zfcp_sdev->latencies.write;
1973                         break;
1974                 case FSF_DATADIR_CMND:
1975                         lat = &zfcp_sdev->latencies.cmd;
1976                         break;
1977                 }
1978
1979                 if (lat) {
1980                         spin_lock(&zfcp_sdev->latencies.lock);
1981                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
1982                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
1983                         lat->counter++;
1984                         spin_unlock(&zfcp_sdev->latencies.lock);
1985                 }
1986         }
1987
1988         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
1989                             sizeof(blktrc));
1990 }
1991
1992 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
1993 {
1994         struct scsi_cmnd *scmnd = req->data;
1995         struct scsi_device *sdev = scmnd->device;
1996         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1997         struct fsf_qtcb_header *header = &req->qtcb->header;
1998
1999         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2000                 return;
2001
2002         switch (header->fsf_status) {
2003         case FSF_HANDLE_MISMATCH:
2004         case FSF_PORT_HANDLE_NOT_VALID:
2005                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2006                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2007                 break;
2008         case FSF_FCPLUN_NOT_VALID:
2009         case FSF_LUN_HANDLE_NOT_VALID:
2010                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2011                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2012                 break;
2013         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2014                 zfcp_fsf_class_not_supp(req);
2015                 break;
2016         case FSF_ACCESS_DENIED:
2017                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2018                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2019                 break;
2020         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2021                 dev_err(&req->adapter->ccw_device->dev,
2022                         "Incorrect direction %d, LUN 0x%016Lx on port "
2023                         "0x%016Lx closed\n",
2024                         req->qtcb->bottom.io.data_direction,
2025                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2026                         (unsigned long long)zfcp_sdev->port->wwpn);
2027                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2028                                           "fssfch3");
2029                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2030                 break;
2031         case FSF_CMND_LENGTH_NOT_VALID:
2032                 dev_err(&req->adapter->ccw_device->dev,
2033                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2034                         "port 0x%016Lx closed\n",
2035                         req->qtcb->bottom.io.fcp_cmnd_length,
2036                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2037                         (unsigned long long)zfcp_sdev->port->wwpn);
2038                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2039                                           "fssfch4");
2040                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2041                 break;
2042         case FSF_PORT_BOXED:
2043                 zfcp_erp_set_port_status(zfcp_sdev->port,
2044                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2045                 zfcp_erp_port_reopen(zfcp_sdev->port,
2046                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2047                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2048                 break;
2049         case FSF_LUN_BOXED:
2050                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2051                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2052                                     "fssfch6");
2053                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2054                 break;
2055         case FSF_ADAPTER_STATUS_AVAILABLE:
2056                 if (header->fsf_status_qual.word[0] ==
2057                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2058                         zfcp_fc_test_link(zfcp_sdev->port);
2059                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2060                 break;
2061         }
2062 }
2063
2064 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2065 {
2066         struct scsi_cmnd *scpnt;
2067         struct fcp_resp_with_ext *fcp_rsp;
2068         unsigned long flags;
2069
2070         read_lock_irqsave(&req->adapter->abort_lock, flags);
2071
2072         scpnt = req->data;
2073         if (unlikely(!scpnt)) {
2074                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2075                 return;
2076         }
2077
2078         zfcp_fsf_fcp_handler_common(req);
2079
2080         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2081                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2082                 goto skip_fsfstatus;
2083         }
2084
2085         switch (req->qtcb->header.fsf_status) {
2086         case FSF_INCONSISTENT_PROT_DATA:
2087         case FSF_INVALID_PROT_PARM:
2088                 set_host_byte(scpnt, DID_ERROR);
2089                 goto skip_fsfstatus;
2090         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2091                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2092                 goto skip_fsfstatus;
2093         case FSF_APP_TAG_CHECK_FAILURE:
2094                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2095                 goto skip_fsfstatus;
2096         case FSF_REF_TAG_CHECK_FAILURE:
2097                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2098                 goto skip_fsfstatus;
2099         }
2100         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2101         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2102
2103 skip_fsfstatus:
2104         zfcp_fsf_req_trace(req, scpnt);
2105         zfcp_dbf_scsi_result(scpnt, req);
2106
2107         scpnt->host_scribble = NULL;
2108         (scpnt->scsi_done) (scpnt);
2109         /*
2110          * We must hold this lock until scsi_done has been called.
2111          * Otherwise we may call scsi_done after abort regarding this
2112          * command has completed.
2113          * Note: scsi_done must not block!
2114          */
2115         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2116 }
2117
2118 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2119 {
2120         switch (scsi_get_prot_op(scsi_cmnd)) {
2121         case SCSI_PROT_NORMAL:
2122                 switch (scsi_cmnd->sc_data_direction) {
2123                 case DMA_NONE:
2124                         *data_dir = FSF_DATADIR_CMND;
2125                         break;
2126                 case DMA_FROM_DEVICE:
2127                         *data_dir = FSF_DATADIR_READ;
2128                         break;
2129                 case DMA_TO_DEVICE:
2130                         *data_dir = FSF_DATADIR_WRITE;
2131                         break;
2132                 case DMA_BIDIRECTIONAL:
2133                         return -EINVAL;
2134                 }
2135                 break;
2136
2137         case SCSI_PROT_READ_STRIP:
2138                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2139                 break;
2140         case SCSI_PROT_WRITE_INSERT:
2141                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2142                 break;
2143         case SCSI_PROT_READ_PASS:
2144                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2145                 break;
2146         case SCSI_PROT_WRITE_PASS:
2147                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2148                 break;
2149         default:
2150                 return -EINVAL;
2151         }
2152
2153         return 0;
2154 }
2155
2156 /**
2157  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2158  * @scsi_cmnd: scsi command to be sent
2159  */
2160 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2161 {
2162         struct zfcp_fsf_req *req;
2163         struct fcp_cmnd *fcp_cmnd;
2164         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2165         int real_bytes, retval = -EIO, dix_bytes = 0;
2166         struct scsi_device *sdev = scsi_cmnd->device;
2167         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2168         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2169         struct zfcp_qdio *qdio = adapter->qdio;
2170         struct fsf_qtcb_bottom_io *io;
2171         unsigned long flags;
2172
2173         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2174                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2175                 return -EBUSY;
2176
2177         spin_lock_irqsave(&qdio->req_q_lock, flags);
2178         if (atomic_read(&qdio->req_q_free) <= 0) {
2179                 atomic_inc(&qdio->req_q_full);
2180                 goto out;
2181         }
2182
2183         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2184                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2185
2186         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2187                                   sbtype, adapter->pool.scsi_req);
2188
2189         if (IS_ERR(req)) {
2190                 retval = PTR_ERR(req);
2191                 goto out;
2192         }
2193
2194         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2195
2196         io = &req->qtcb->bottom.io;
2197         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2198         req->data = scsi_cmnd;
2199         req->handler = zfcp_fsf_fcp_cmnd_handler;
2200         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2201         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2202         io->service_class = FSF_CLASS_3;
2203         io->fcp_cmnd_length = FCP_CMND_LEN;
2204
2205         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2206                 io->data_block_length = scsi_cmnd->device->sector_size;
2207                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2208         }
2209
2210         zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction);
2211
2212         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2213         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2214
2215         if (scsi_prot_sg_count(scsi_cmnd)) {
2216                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2217                                        scsi_prot_sg_count(scsi_cmnd));
2218                 dix_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2219                                                 scsi_prot_sglist(scsi_cmnd));
2220                 io->prot_data_length = dix_bytes;
2221         }
2222
2223         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2224                                              scsi_sglist(scsi_cmnd));
2225
2226         if (unlikely(real_bytes < 0) || unlikely(dix_bytes < 0))
2227                 goto failed_scsi_cmnd;
2228
2229         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2230
2231         retval = zfcp_fsf_req_send(req);
2232         if (unlikely(retval))
2233                 goto failed_scsi_cmnd;
2234
2235         goto out;
2236
2237 failed_scsi_cmnd:
2238         zfcp_fsf_req_free(req);
2239         scsi_cmnd->host_scribble = NULL;
2240 out:
2241         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2242         return retval;
2243 }
2244
2245 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2246 {
2247         struct fcp_resp_with_ext *fcp_rsp;
2248         struct fcp_resp_rsp_info *rsp_info;
2249
2250         zfcp_fsf_fcp_handler_common(req);
2251
2252         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2253         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2254
2255         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2256              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2257                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2258 }
2259
2260 /**
2261  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2262  * @scmnd: SCSI command to send the task management command for
2263  * @tm_flags: unsigned byte for task management flags
2264  * Returns: on success pointer to struct fsf_req, NULL otherwise
2265  */
2266 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2267                                             u8 tm_flags)
2268 {
2269         struct zfcp_fsf_req *req = NULL;
2270         struct fcp_cmnd *fcp_cmnd;
2271         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2272         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2273
2274         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2275                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2276                 return NULL;
2277
2278         spin_lock_irq(&qdio->req_q_lock);
2279         if (zfcp_qdio_sbal_get(qdio))
2280                 goto out;
2281
2282         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2283                                   SBAL_SFLAGS0_TYPE_WRITE,
2284                                   qdio->adapter->pool.scsi_req);
2285
2286         if (IS_ERR(req)) {
2287                 req = NULL;
2288                 goto out;
2289         }
2290
2291         req->data = scmnd;
2292         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2293         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2294         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2295         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2296         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2297         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2298
2299         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2300
2301         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2302         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2303
2304         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2305         if (!zfcp_fsf_req_send(req))
2306                 goto out;
2307
2308         zfcp_fsf_req_free(req);
2309         req = NULL;
2310 out:
2311         spin_unlock_irq(&qdio->req_q_lock);
2312         return req;
2313 }
2314
2315 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2316 {
2317 }
2318
2319 /**
2320  * zfcp_fsf_control_file - control file upload/download
2321  * @adapter: pointer to struct zfcp_adapter
2322  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2323  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2324  */
2325 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2326                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2327 {
2328         struct zfcp_qdio *qdio = adapter->qdio;
2329         struct zfcp_fsf_req *req = NULL;
2330         struct fsf_qtcb_bottom_support *bottom;
2331         int retval = -EIO, bytes;
2332         u8 direction;
2333
2334         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2335                 return ERR_PTR(-EOPNOTSUPP);
2336
2337         switch (fsf_cfdc->command) {
2338         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2339                 direction = SBAL_SFLAGS0_TYPE_WRITE;
2340                 break;
2341         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2342                 direction = SBAL_SFLAGS0_TYPE_READ;
2343                 break;
2344         default:
2345                 return ERR_PTR(-EINVAL);
2346         }
2347
2348         spin_lock_irq(&qdio->req_q_lock);
2349         if (zfcp_qdio_sbal_get(qdio))
2350                 goto out;
2351
2352         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2353         if (IS_ERR(req)) {
2354                 retval = -EPERM;
2355                 goto out;
2356         }
2357
2358         req->handler = zfcp_fsf_control_file_handler;
2359
2360         bottom = &req->qtcb->bottom.support;
2361         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2362         bottom->option = fsf_cfdc->option;
2363
2364         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2365
2366         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2367                 zfcp_fsf_req_free(req);
2368                 goto out;
2369         }
2370         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2371
2372         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2373         retval = zfcp_fsf_req_send(req);
2374 out:
2375         spin_unlock_irq(&qdio->req_q_lock);
2376
2377         if (!retval) {
2378                 wait_for_completion(&req->completion);
2379                 return req;
2380         }
2381         return ERR_PTR(retval);
2382 }
2383
2384 /**
2385  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2386  * @adapter: pointer to struct zfcp_adapter
2387  * @sbal_idx: response queue index of SBAL to be processed
2388  */
2389 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2390 {
2391         struct zfcp_adapter *adapter = qdio->adapter;
2392         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2393         struct qdio_buffer_element *sbale;
2394         struct zfcp_fsf_req *fsf_req;
2395         unsigned long req_id;
2396         int idx;
2397
2398         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2399
2400                 sbale = &sbal->element[idx];
2401                 req_id = (unsigned long) sbale->addr;
2402                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2403
2404                 if (!fsf_req) {
2405                         /*
2406                          * Unknown request means that we have potentially memory
2407                          * corruption and must stop the machine immediately.
2408                          */
2409                         zfcp_qdio_siosl(adapter);
2410                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2411                               req_id, dev_name(&adapter->ccw_device->dev));
2412                 }
2413
2414                 fsf_req->qdio_req.sbal_response = sbal_idx;
2415                 zfcp_fsf_req_complete(fsf_req);
2416
2417                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2418                         break;
2419         }
2420 }
2421
2422 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2423                                       struct qdio_buffer *sbal)
2424 {
2425         struct qdio_buffer_element *sbale = &sbal->element[0];
2426         u64 req_id = (unsigned long) sbale->addr;
2427
2428         return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2429 }