SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2009
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <scsi/fc/fc_els.h>
  14 #include "zfcp_ext.h"
  15 #include "zfcp_fc.h"
  16 #include "zfcp_dbf.h"
  17
  18 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  19 {
  20         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  21         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  22                                 "fsrth_1", NULL);
  23 }
  24
  25 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  26                                  unsigned long timeout)
  27 {
  28         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  29         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  30         fsf_req->timer.expires = jiffies + timeout;
  31         add_timer(&fsf_req->timer);
  32 }
  33
  34 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  35 {
  36         BUG_ON(!fsf_req->erp_action);
  37         fsf_req->timer.function = zfcp_erp_timeout_handler;
  38         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  39         fsf_req->timer.expires = jiffies + 30 * HZ;
  40         add_timer(&fsf_req->timer);
  41 }
  42
  43 /* association between FSF command and FSF QTCB type */
  44 static u32 fsf_qtcb_type[] = {
  45         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  46         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  47         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  48         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  49         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  50         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  51         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  52         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  55         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  56         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  58 };
  59
  60 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
  61 {
  62         u16 subtable = table >> 16;
  63         u16 rule = table & 0xffff;
  64         const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
  65
  66         if (subtable && subtable < ARRAY_SIZE(act_type))
  67                 dev_warn(&adapter->ccw_device->dev,
  68                          "Access denied according to ACT rule type %s, "
  69                          "rule %d\n", act_type[subtable], rule);
  70 }
  71
  72 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
  73                                         struct zfcp_port *port)
  74 {
  75         struct fsf_qtcb_header *header = &req->qtcb->header;
  76         dev_warn(&req->adapter->ccw_device->dev,
  77                  "Access denied to port 0x%016Lx\n",
  78                  (unsigned long long)port->wwpn);
  79         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  80         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  81         zfcp_erp_port_access_denied(port, "fspad_1", req);
  82         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  83 }
  84
  85 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
  86                                         struct zfcp_unit *unit)
  87 {
  88         struct fsf_qtcb_header *header = &req->qtcb->header;
  89         dev_warn(&req->adapter->ccw_device->dev,
  90                  "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
  91                  (unsigned long long)unit->fcp_lun,
  92                  (unsigned long long)unit->port->wwpn);
  93         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  94         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  95         zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
  96         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  97 }
  98
  99 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
 100 {
 101         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
 102                 "operational because of an unsupported FC class\n");
 103         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
 104         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 105 }
 106
 107 /**
 108  * zfcp_fsf_req_free - free memory used by fsf request
 109  * @fsf_req: pointer to struct zfcp_fsf_req
 110  */
 111 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
 112 {
 113         if (likely(req->pool)) {
 114                 if (likely(req->qtcb))
 115                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
 116                 mempool_free(req, req->pool);
 117                 return;
 118         }
 119
 120         if (likely(req->qtcb))
 121                 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
 122         kfree(req);
 123 }
 124
 125 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 126 {
 127         unsigned long flags;
 128         struct fsf_status_read_buffer *sr_buf = req->data;
 129         struct zfcp_adapter *adapter = req->adapter;
 130         struct zfcp_port *port;
 131         int d_id = ntoh24(sr_buf->d_id);
 132
 133         read_lock_irqsave(&adapter->port_list_lock, flags);
 134         list_for_each_entry(port, &adapter->port_list, list)
 135                 if (port->d_id == d_id) {
 136                         zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
 137                         break;
 138                 }
 139         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 140 }
 141
 142 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
 143                                          struct fsf_link_down_info *link_down)
 144 {
 145         struct zfcp_adapter *adapter = req->adapter;
 146
 147         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 148                 return;
 149
 150         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 151
 152         zfcp_scsi_schedule_rports_block(adapter);
 153
 154         if (!link_down)
 155                 goto out;
 156
 157         switch (link_down->error_code) {
 158         case FSF_PSQ_LINK_NO_LIGHT:
 159                 dev_warn(&req->adapter->ccw_device->dev,
 160                          "There is no light signal from the local "
 161                          "fibre channel cable\n");
 162                 break;
 163         case FSF_PSQ_LINK_WRAP_PLUG:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "There is a wrap plug instead of a fibre "
 166                          "channel cable\n");
 167                 break;
 168         case FSF_PSQ_LINK_NO_FCP:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The adjacent fibre channel node does not "
 171                          "support FCP\n");
 172                 break;
 173         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The FCP device is suspended because of a "
 176                          "firmware update\n");
 177                 break;
 178         case FSF_PSQ_LINK_INVALID_WWPN:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "The FCP device detected a WWPN that is "
 181                          "duplicate or not valid\n");
 182                 break;
 183         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "The fibre channel fabric does not support NPIV\n");
 186                 break;
 187         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 188                 dev_warn(&req->adapter->ccw_device->dev,
 189                          "The FCP adapter cannot support more NPIV ports\n");
 190                 break;
 191         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 192                 dev_warn(&req->adapter->ccw_device->dev,
 193                          "The adjacent switch cannot support "
 194                          "more NPIV ports\n");
 195                 break;
 196         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 197                 dev_warn(&req->adapter->ccw_device->dev,
 198                          "The FCP adapter could not log in to the "
 199                          "fibre channel fabric\n");
 200                 break;
 201         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 202                 dev_warn(&req->adapter->ccw_device->dev,
 203                          "The WWPN assignment file on the FCP adapter "
 204                          "has been damaged\n");
 205                 break;
 206         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 207                 dev_warn(&req->adapter->ccw_device->dev,
 208                          "The mode table on the FCP adapter "
 209                          "has been damaged\n");
 210                 break;
 211         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 212                 dev_warn(&req->adapter->ccw_device->dev,
 213                          "All NPIV ports on the FCP adapter have "
 214                          "been assigned\n");
 215                 break;
 216         default:
 217                 dev_warn(&req->adapter->ccw_device->dev,
 218                          "The link between the FCP adapter and "
 219                          "the FC fabric is down\n");
 220         }
 221 out:
 222         zfcp_erp_adapter_failed(adapter, id, req);
 223 }
 224
 225 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 226 {
 227         struct fsf_status_read_buffer *sr_buf = req->data;
 228         struct fsf_link_down_info *ldi =
 229                 (struct fsf_link_down_info *) &sr_buf->payload;
 230
 231         switch (sr_buf->status_subtype) {
 232         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 233                 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
 234                 break;
 235         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 236                 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
 237                 break;
 238         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 239                 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
 240         };
 241 }
 242
 243 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 244 {
 245         struct zfcp_adapter *adapter = req->adapter;
 246         struct fsf_status_read_buffer *sr_buf = req->data;
 247
 248         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 249                 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
 250                 mempool_free(sr_buf, adapter->pool.status_read_data);
 251                 zfcp_fsf_req_free(req);
 252                 return;
 253         }
 254
 255         zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
 256
 257         switch (sr_buf->status_type) {
 258         case FSF_STATUS_READ_PORT_CLOSED:
 259                 zfcp_fsf_status_read_port_closed(req);
 260                 break;
 261         case FSF_STATUS_READ_INCOMING_ELS:
 262                 zfcp_fc_incoming_els(req);
 263                 break;
 264         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 265                 break;
 266         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 267                 dev_warn(&adapter->ccw_device->dev,
 268                          "The error threshold for checksum statistics "
 269                          "has been exceeded\n");
 270                 zfcp_dbf_hba_berr(adapter->dbf, req);
 271                 break;
 272         case FSF_STATUS_READ_LINK_DOWN:
 273                 zfcp_fsf_status_read_link_down(req);
 274                 break;
 275         case FSF_STATUS_READ_LINK_UP:
 276                 dev_info(&adapter->ccw_device->dev,
 277                          "The local link has been restored\n");
 278                 /* All ports should be marked as ready to run again */
 279                 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
 280                                                ZFCP_STATUS_COMMON_RUNNING,
 281                                                ZFCP_SET);
 282                 zfcp_erp_adapter_reopen(adapter,
 283                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 284                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 285                                         "fssrh_2", req);
 286                 break;
 287         case FSF_STATUS_READ_NOTIFICATION_LOST:
 288                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 289                         zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
 290                                                         req);
 291                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 292                         queue_work(adapter->work_queue, &adapter->scan_work);
 293                 break;
 294         case FSF_STATUS_READ_CFDC_UPDATED:
 295                 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
 296                 break;
 297         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 298                 adapter->adapter_features = sr_buf->payload.word[0];
 299                 break;
 300         }
 301
 302         mempool_free(sr_buf, adapter->pool.status_read_data);
 303         zfcp_fsf_req_free(req);
 304
 305         atomic_inc(&adapter->stat_miss);
 306         queue_work(adapter->work_queue, &adapter->stat_work);
 307 }
 308
 309 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 310 {
 311         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 312         case FSF_SQ_FCP_RSP_AVAILABLE:
 313         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 314         case FSF_SQ_NO_RETRY_POSSIBLE:
 315         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 316                 return;
 317         case FSF_SQ_COMMAND_ABORTED:
 318                 break;
 319         case FSF_SQ_NO_RECOM:
 320                 dev_err(&req->adapter->ccw_device->dev,
 321                         "The FCP adapter reported a problem "
 322                         "that cannot be recovered\n");
 323                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
 324                 break;
 325         }
 326         /* all non-return stats set FSFREQ_ERROR*/
 327         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 328 }
 329
 330 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 331 {
 332         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 333                 return;
 334
 335         switch (req->qtcb->header.fsf_status) {
 336         case FSF_UNKNOWN_COMMAND:
 337                 dev_err(&req->adapter->ccw_device->dev,
 338                         "The FCP adapter does not recognize the command 0x%x\n",
 339                         req->qtcb->header.fsf_command);
 340                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
 341                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 342                 break;
 343         case FSF_ADAPTER_STATUS_AVAILABLE:
 344                 zfcp_fsf_fsfstatus_qual_eval(req);
 345                 break;
 346         }
 347 }
 348
 349 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 350 {
 351         struct zfcp_adapter *adapter = req->adapter;
 352         struct fsf_qtcb *qtcb = req->qtcb;
 353         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 354
 355         zfcp_dbf_hba_fsf_response(req);
 356
 357         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 358                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 359                 return;
 360         }
 361
 362         switch (qtcb->prefix.prot_status) {
 363         case FSF_PROT_GOOD:
 364         case FSF_PROT_FSF_STATUS_PRESENTED:
 365                 return;
 366         case FSF_PROT_QTCB_VERSION_ERROR:
 367                 dev_err(&adapter->ccw_device->dev,
 368                         "QTCB version 0x%x not supported by FCP adapter "
 369                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 370                         psq->word[0], psq->word[1]);
 371                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
 372                 break;
 373         case FSF_PROT_ERROR_STATE:
 374         case FSF_PROT_SEQ_NUMB_ERROR:
 375                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
 376                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 377                 break;
 378         case FSF_PROT_UNSUPP_QTCB_TYPE:
 379                 dev_err(&adapter->ccw_device->dev,
 380                         "The QTCB type is not supported by the FCP adapter\n");
 381                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
 382                 break;
 383         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 384                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 385                                 &adapter->status);
 386                 break;
 387         case FSF_PROT_DUPLICATE_REQUEST_ID:
 388                 dev_err(&adapter->ccw_device->dev,
 389                         "0x%Lx is an ambiguous request identifier\n",
 390                         (unsigned long long)qtcb->bottom.support.req_handle);
 391                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
 392                 break;
 393         case FSF_PROT_LINK_DOWN:
 394                 zfcp_fsf_link_down_info_eval(req, "fspse_5",
 395                                              &psq->link_down_info);
 396                 /* FIXME: reopening adapter now? better wait for link up */
 397                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
 398                 break;
 399         case FSF_PROT_REEST_QUEUE:
 400                 /* All ports should be marked as ready to run again */
 401                 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
 402                                                ZFCP_STATUS_COMMON_RUNNING,
 403                                                ZFCP_SET);
 404                 zfcp_erp_adapter_reopen(adapter,
 405                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 406                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 407                                         "fspse_8", req);
 408                 break;
 409         default:
 410                 dev_err(&adapter->ccw_device->dev,
 411                         "0x%x is not a valid transfer protocol status\n",
 412                         qtcb->prefix.prot_status);
 413                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
 414         }
 415         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 416 }
 417
 418 /**
 419  * zfcp_fsf_req_complete - process completion of a FSF request
 420  * @fsf_req: The FSF request that has been completed.
 421  *
 422  * When a request has been completed either from the FCP adapter,
 423  * or it has been dismissed due to a queue shutdown, this function
 424  * is called to process the completion status and trigger further
 425  * events related to the FSF request.
 426  */
 427 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 428 {
 429         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 430                 zfcp_fsf_status_read_handler(req);
 431                 return;
 432         }
 433
 434         del_timer(&req->timer);
 435         zfcp_fsf_protstatus_eval(req);
 436         zfcp_fsf_fsfstatus_eval(req);
 437         req->handler(req);
 438
 439         if (req->erp_action)
 440                 zfcp_erp_notify(req->erp_action, 0);
 441
 442         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 443                 zfcp_fsf_req_free(req);
 444         else
 445                 complete(&req->completion);
 446 }
 447
 448 /**
 449  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 450  * @adapter: pointer to struct zfcp_adapter
 451  *
 452  * Never ever call this without shutting down the adapter first.
 453  * Otherwise the adapter would continue using and corrupting s390 storage.
 454  * Included BUG_ON() call to ensure this is done.
 455  * ERP is supposed to be the only user of this function.
 456  */
 457 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 458 {
 459         struct zfcp_fsf_req *req, *tmp;
 460         unsigned long flags;
 461         LIST_HEAD(remove_queue);
 462         unsigned int i;
 463
 464         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 465         spin_lock_irqsave(&adapter->req_list_lock, flags);
 466         for (i = 0; i < REQUEST_LIST_SIZE; i++)
 467                 list_splice_init(&adapter->req_list[i], &remove_queue);
 468         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 469
 470         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 471                 list_del(&req->list);
 472                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 473                 zfcp_fsf_req_complete(req);
 474         }
 475 }
 476
 477 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 478 {
 479         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 480         struct zfcp_adapter *adapter = req->adapter;
 481         struct Scsi_Host *shost = adapter->scsi_host;
 482         struct fc_els_flogi *nsp, *plogi;
 483
 484         /* adjust pointers for missing command code */
 485         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 486                                         - sizeof(u32));
 487         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 488                                         - sizeof(u32));
 489
 490         if (req->data)
 491                 memcpy(req->data, bottom, sizeof(*bottom));
 492
 493         fc_host_port_name(shost) = nsp->fl_wwpn;
 494         fc_host_node_name(shost) = nsp->fl_wwnn;
 495         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 496         fc_host_speed(shost) = bottom->fc_link_speed;
 497         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 498         fc_host_supported_fc4s(shost)[2] = 1; /* FCP */
 499         fc_host_active_fc4s(shost)[2] = 1; /* FCP */
 500
 501         adapter->hydra_version = bottom->adapter_type;
 502         adapter->timer_ticks = bottom->timer_interval;
 503
 504         if (fc_host_permanent_port_name(shost) == -1)
 505                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 506
 507         switch (bottom->fc_topology) {
 508         case FSF_TOPO_P2P:
 509                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 510                 adapter->peer_wwpn = plogi->fl_wwpn;
 511                 adapter->peer_wwnn = plogi->fl_wwnn;
 512                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 513                 break;
 514         case FSF_TOPO_FABRIC:
 515                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 516                 break;
 517         case FSF_TOPO_AL:
 518                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 519                 /* fall through */
 520         default:
 521                 dev_err(&adapter->ccw_device->dev,
 522                         "Unknown or unsupported arbitrated loop "
 523                         "fibre channel topology detected\n");
 524                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
 525                 return -EIO;
 526         }
 527
 528         return 0;
 529 }
 530
 531 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 532 {
 533         struct zfcp_adapter *adapter = req->adapter;
 534         struct fsf_qtcb *qtcb = req->qtcb;
 535         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 536         struct Scsi_Host *shost = adapter->scsi_host;
 537
 538         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 539                 return;
 540
 541         adapter->fsf_lic_version = bottom->lic_version;
 542         adapter->adapter_features = bottom->adapter_features;
 543         adapter->connection_features = bottom->connection_features;
 544         adapter->peer_wwpn = 0;
 545         adapter->peer_wwnn = 0;
 546         adapter->peer_d_id = 0;
 547
 548         switch (qtcb->header.fsf_status) {
 549         case FSF_GOOD:
 550                 if (zfcp_fsf_exchange_config_evaluate(req))
 551                         return;
 552
 553                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 554                         dev_err(&adapter->ccw_device->dev,
 555                                 "FCP adapter maximum QTCB size (%d bytes) "
 556                                 "is too small\n",
 557                                 bottom->max_qtcb_size);
 558                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
 559                         return;
 560                 }
 561                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 562                                 &adapter->status);
 563                 break;
 564         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 565                 fc_host_node_name(shost) = 0;
 566                 fc_host_port_name(shost) = 0;
 567                 fc_host_port_id(shost) = 0;
 568                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 569                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 570                 adapter->hydra_version = 0;
 571
 572                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 573                                 &adapter->status);
 574
 575                 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
 576                         &qtcb->header.fsf_status_qual.link_down_info);
 577                 break;
 578         default:
 579                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
 580                 return;
 581         }
 582
 583         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 584                 adapter->hardware_version = bottom->hardware_version;
 585                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 586                        min(FC_SERIAL_NUMBER_SIZE, 17));
 587                 EBCASC(fc_host_serial_number(shost),
 588                        min(FC_SERIAL_NUMBER_SIZE, 17));
 589         }
 590
 591         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 592                 dev_err(&adapter->ccw_device->dev,
 593                         "The FCP adapter only supports newer "
 594                         "control block versions\n");
 595                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
 596                 return;
 597         }
 598         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 599                 dev_err(&adapter->ccw_device->dev,
 600                         "The FCP adapter only supports older "
 601                         "control block versions\n");
 602                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
 603         }
 604 }
 605
 606 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 607 {
 608         struct zfcp_adapter *adapter = req->adapter;
 609         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 610         struct Scsi_Host *shost = adapter->scsi_host;
 611
 612         if (req->data)
 613                 memcpy(req->data, bottom, sizeof(*bottom));
 614
 615         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 616                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 617                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 618         } else
 619                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 620         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 621         fc_host_supported_speeds(shost) = bottom->supported_speed;
 622 }
 623
 624 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 625 {
 626         struct fsf_qtcb *qtcb = req->qtcb;
 627
 628         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 629                 return;
 630
 631         switch (qtcb->header.fsf_status) {
 632         case FSF_GOOD:
 633                 zfcp_fsf_exchange_port_evaluate(req);
 634                 break;
 635         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 636                 zfcp_fsf_exchange_port_evaluate(req);
 637                 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
 638                         &qtcb->header.fsf_status_qual.link_down_info);
 639                 break;
 640         }
 641 }
 642
 643 static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
 644 {
 645         struct zfcp_qdio_queue *req_q = &qdio->req_q;
 646
 647         spin_lock_bh(&qdio->req_q_lock);
 648         if (atomic_read(&req_q->count))
 649                 return 1;
 650         spin_unlock_bh(&qdio->req_q_lock);
 651         return 0;
 652 }
 653
 654 static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
 655 {
 656         struct zfcp_adapter *adapter = qdio->adapter;
 657         long ret;
 658
 659         spin_unlock_bh(&qdio->req_q_lock);
 660         ret = wait_event_interruptible_timeout(qdio->req_q_wq,
 661                                zfcp_fsf_sbal_check(qdio), 5 * HZ);
 662         if (ret > 0)
 663                 return 0;
 664         if (!ret) {
 665                 atomic_inc(&qdio->req_q_full);
 666                 /* assume hanging outbound queue, try queue recovery */
 667                 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
 668         }
 669
 670         spin_lock_bh(&qdio->req_q_lock);
 671         return -EIO;
 672 }
 673
 674 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 675 {
 676         struct zfcp_fsf_req *req;
 677
 678         if (likely(pool))
 679                 req = mempool_alloc(pool, GFP_ATOMIC);
 680         else
 681                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 682
 683         if (unlikely(!req))
 684                 return NULL;
 685
 686         memset(req, 0, sizeof(*req));
 687         req->pool = pool;
 688         return req;
 689 }
 690
 691 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 692 {
 693         struct fsf_qtcb *qtcb;
 694
 695         if (likely(pool))
 696                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 697         else
 698                 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
 699
 700         if (unlikely(!qtcb))
 701                 return NULL;
 702
 703         memset(qtcb, 0, sizeof(*qtcb));
 704         return qtcb;
 705 }
 706
 707 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 708                                                 u32 fsf_cmd, mempool_t *pool)
 709 {
 710         struct qdio_buffer_element *sbale;
 711         struct zfcp_qdio_queue *req_q = &qdio->req_q;
 712         struct zfcp_adapter *adapter = qdio->adapter;
 713         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 714
 715         if (unlikely(!req))
 716                 return ERR_PTR(-ENOMEM);
 717
 718         if (adapter->req_no == 0)
 719                 adapter->req_no++;
 720
 721         INIT_LIST_HEAD(&req->list);
 722         init_timer(&req->timer);
 723         init_completion(&req->completion);
 724
 725         req->adapter = adapter;
 726         req->fsf_command = fsf_cmd;
 727         req->req_id = adapter->req_no;
 728         req->queue_req.sbal_number = 1;
 729         req->queue_req.sbal_first = req_q->first;
 730         req->queue_req.sbal_last = req_q->first;
 731         req->queue_req.sbale_curr = 1;
 732
 733         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 734         sbale[0].addr = (void *) req->req_id;
 735         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 736
 737         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 738                 if (likely(pool))
 739                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 740                 else
 741                         req->qtcb = zfcp_qtcb_alloc(NULL);
 742
 743                 if (unlikely(!req->qtcb)) {
 744                         zfcp_fsf_req_free(req);
 745                         return ERR_PTR(-ENOMEM);
 746                 }
 747
 748                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 749                 req->qtcb->prefix.req_id = req->req_id;
 750                 req->qtcb->prefix.ulp_info = 26;
 751                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 752                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 753                 req->qtcb->header.req_handle = req->req_id;
 754                 req->qtcb->header.fsf_command = req->fsf_command;
 755                 req->seq_no = adapter->fsf_req_seq_no;
 756                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 757                 sbale[1].addr = (void *) req->qtcb;
 758                 sbale[1].length = sizeof(struct fsf_qtcb);
 759         }
 760
 761         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
 762                 zfcp_fsf_req_free(req);
 763                 return ERR_PTR(-EIO);
 764         }
 765
 766         return req;
 767 }
 768
 769 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 770 {
 771         struct zfcp_adapter *adapter = req->adapter;
 772         struct zfcp_qdio *qdio = adapter->qdio;
 773         unsigned long        flags;
 774         int                  idx;
 775         int                  with_qtcb = (req->qtcb != NULL);
 776
 777         /* put allocated FSF request into hash table */
 778         spin_lock_irqsave(&adapter->req_list_lock, flags);
 779         idx = zfcp_reqlist_hash(req->req_id);
 780         list_add_tail(&req->list, &adapter->req_list[idx]);
 781         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 782
 783         req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
 784         req->issued = get_clock();
 785         if (zfcp_qdio_send(qdio, &req->queue_req)) {
 786                 del_timer(&req->timer);
 787                 spin_lock_irqsave(&adapter->req_list_lock, flags);
 788                 /* lookup request again, list might have changed */
 789                 if (zfcp_reqlist_find_safe(adapter, req))
 790                         zfcp_reqlist_remove(adapter, req);
 791                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 792                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
 793                 return -EIO;
 794         }
 795
 796         /* Don't increase for unsolicited status */
 797         if (with_qtcb)
 798                 adapter->fsf_req_seq_no++;
 799         adapter->req_no++;
 800
 801         return 0;
 802 }
 803
 804 /**
 805  * zfcp_fsf_status_read - send status read request
 806  * @adapter: pointer to struct zfcp_adapter
 807  * @req_flags: request flags
 808  * Returns: 0 on success, ERROR otherwise
 809  */
 810 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 811 {
 812         struct zfcp_adapter *adapter = qdio->adapter;
 813         struct zfcp_fsf_req *req;
 814         struct fsf_status_read_buffer *sr_buf;
 815         struct qdio_buffer_element *sbale;
 816         int retval = -EIO;
 817
 818         spin_lock_bh(&qdio->req_q_lock);
 819         if (zfcp_fsf_req_sbal_get(qdio))
 820                 goto out;
 821
 822         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 823                                   adapter->pool.status_read_req);
 824         if (IS_ERR(req)) {
 825                 retval = PTR_ERR(req);
 826                 goto out;
 827         }
 828
 829         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 830         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 831         req->queue_req.sbale_curr = 2;
 832
 833         sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 834         if (!sr_buf) {
 835                 retval = -ENOMEM;
 836                 goto failed_buf;
 837         }
 838         memset(sr_buf, 0, sizeof(*sr_buf));
 839         req->data = sr_buf;
 840         sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
 841         sbale->addr = (void *) sr_buf;
 842         sbale->length = sizeof(*sr_buf);
 843
 844         retval = zfcp_fsf_req_send(req);
 845         if (retval)
 846                 goto failed_req_send;
 847
 848         goto out;
 849
 850 failed_req_send:
 851         mempool_free(sr_buf, adapter->pool.status_read_data);
 852 failed_buf:
 853         zfcp_fsf_req_free(req);
 854         zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
 855 out:
 856         spin_unlock_bh(&qdio->req_q_lock);
 857         return retval;
 858 }
 859
 860 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 861 {
 862         struct zfcp_unit *unit = req->data;
 863         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 864
 865         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 866                 return;
 867
 868         switch (req->qtcb->header.fsf_status) {
 869         case FSF_PORT_HANDLE_NOT_VALID:
 870                 if (fsq->word[0] == fsq->word[1]) {
 871                         zfcp_erp_adapter_reopen(unit->port->adapter, 0,
 872                                                 "fsafch1", req);
 873                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 874                 }
 875                 break;
 876         case FSF_LUN_HANDLE_NOT_VALID:
 877                 if (fsq->word[0] == fsq->word[1]) {
 878                         zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
 879                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 880                 }
 881                 break;
 882         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 883                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 884                 break;
 885         case FSF_PORT_BOXED:
 886                 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
 887                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 888                 break;
 889         case FSF_LUN_BOXED:
 890                 zfcp_erp_unit_boxed(unit, "fsafch4", req);
 891                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 892                 break;
 893         case FSF_ADAPTER_STATUS_AVAILABLE:
 894                 switch (fsq->word[0]) {
 895                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 896                         zfcp_fc_test_link(unit->port);
 897                         /* fall through */
 898                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 899                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 900                         break;
 901                 }
 902                 break;
 903         case FSF_GOOD:
 904                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 905                 break;
 906         }
 907 }
 908
 909 /**
 910  * zfcp_fsf_abort_fcp_command - abort running SCSI command
 911  * @old_req_id: unsigned long
 912  * @unit: pointer to struct zfcp_unit
 913  * Returns: pointer to struct zfcp_fsf_req
 914  */
 915
 916 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 917                                                 struct zfcp_unit *unit)
 918 {
 919         struct qdio_buffer_element *sbale;
 920         struct zfcp_fsf_req *req = NULL;
 921         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
 922
 923         spin_lock_bh(&qdio->req_q_lock);
 924         if (zfcp_fsf_req_sbal_get(qdio))
 925                 goto out;
 926         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 927                                   qdio->adapter->pool.scsi_abort);
 928         if (IS_ERR(req)) {
 929                 req = NULL;
 930                 goto out;
 931         }
 932
 933         if (unlikely(!(atomic_read(&unit->status) &
 934                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 935                 goto out_error_free;
 936
 937         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 938         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 939         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 940
 941         req->data = unit;
 942         req->handler = zfcp_fsf_abort_fcp_command_handler;
 943         req->qtcb->header.lun_handle = unit->handle;
 944         req->qtcb->header.port_handle = unit->port->handle;
 945         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 946
 947         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 948         if (!zfcp_fsf_req_send(req))
 949                 goto out;
 950
 951 out_error_free:
 952         zfcp_fsf_req_free(req);
 953         req = NULL;
 954 out:
 955         spin_unlock_bh(&qdio->req_q_lock);
 956         return req;
 957 }
 958
 959 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 960 {
 961         struct zfcp_adapter *adapter = req->adapter;
 962         struct zfcp_fsf_ct_els *ct = req->data;
 963         struct fsf_qtcb_header *header = &req->qtcb->header;
 964
 965         ct->status = -EINVAL;
 966
 967         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 968                 goto skip_fsfstatus;
 969
 970         switch (header->fsf_status) {
 971         case FSF_GOOD:
 972                 zfcp_dbf_san_ct_response(req);
 973                 ct->status = 0;
 974                 break;
 975         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 976                 zfcp_fsf_class_not_supp(req);
 977                 break;
 978         case FSF_ADAPTER_STATUS_AVAILABLE:
 979                 switch (header->fsf_status_qual.word[0]){
 980                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 981                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 982                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 983                         break;
 984                 }
 985                 break;
 986         case FSF_ACCESS_DENIED:
 987                 break;
 988         case FSF_PORT_BOXED:
 989                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 990                 break;
 991         case FSF_PORT_HANDLE_NOT_VALID:
 992                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
 993                 /* fall through */
 994         case FSF_GENERIC_COMMAND_REJECTED:
 995         case FSF_PAYLOAD_SIZE_MISMATCH:
 996         case FSF_REQUEST_SIZE_TOO_LARGE:
 997         case FSF_RESPONSE_SIZE_TOO_LARGE:
 998         case FSF_SBAL_MISMATCH:
 999                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1000                 break;
1001         }
1002
1003 skip_fsfstatus:
1004         if (ct->handler)
1005                 ct->handler(ct->handler_data);
1006 }
1007
1008 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1009                                             struct scatterlist *sg_req,
1010                                             struct scatterlist *sg_resp)
1011 {
1012         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1013         sbale[2].addr   = sg_virt(sg_req);
1014         sbale[2].length = sg_req->length;
1015         sbale[3].addr   = sg_virt(sg_resp);
1016         sbale[3].length = sg_resp->length;
1017         sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1018 }
1019
1020 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1021 {
1022         return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1023 }
1024
1025 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1026                                        struct scatterlist *sg_req,
1027                                        struct scatterlist *sg_resp,
1028                                        int max_sbals)
1029 {
1030         struct zfcp_adapter *adapter = req->adapter;
1031         struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1032                                                                &req->queue_req);
1033         u32 feat = adapter->adapter_features;
1034         int bytes;
1035
1036         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1037                 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1038                         return -EOPNOTSUPP;
1039
1040                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1041                 return 0;
1042         }
1043
1044         /* use single, unchained SBAL if it can hold the request */
1045         if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1046                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1047                 return 0;
1048         }
1049
1050         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1051                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1052                                         sg_req, max_sbals);
1053         if (bytes <= 0)
1054                 return -EIO;
1055         req->qtcb->bottom.support.req_buf_length = bytes;
1056         req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1057
1058         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1059                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1060                                         sg_resp, max_sbals);
1061         req->qtcb->bottom.support.resp_buf_length = bytes;
1062         if (bytes <= 0)
1063                 return -EIO;
1064
1065         return 0;
1066 }
1067
1068 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1069                                  struct scatterlist *sg_req,
1070                                  struct scatterlist *sg_resp,
1071                                  int max_sbals)
1072 {
1073         int ret;
1074         unsigned int fcp_chan_timeout;
1075
1076         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1077         if (ret)
1078                 return ret;
1079
1080         /* common settings for ct/gs and els requests */
1081         fcp_chan_timeout = 2 * FC_DEF_R_A_TOV / 1000;
1082         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1083         req->qtcb->bottom.support.timeout = fcp_chan_timeout;
1084         zfcp_fsf_start_timer(req, (fcp_chan_timeout + 10) * HZ);
1085
1086         return 0;
1087 }
1088
1089 /**
1090  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1091  * @ct: pointer to struct zfcp_send_ct with data for request
1092  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1093  */
1094 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1095                      struct zfcp_fsf_ct_els *ct, mempool_t *pool)
1096 {
1097         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1098         struct zfcp_fsf_req *req;
1099         int ret = -EIO;
1100
1101         spin_lock_bh(&qdio->req_q_lock);
1102         if (zfcp_fsf_req_sbal_get(qdio))
1103                 goto out;
1104
1105         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1106
1107         if (IS_ERR(req)) {
1108                 ret = PTR_ERR(req);
1109                 goto out;
1110         }
1111
1112         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1113         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1114                                     FSF_MAX_SBALS_PER_REQ);
1115         if (ret)
1116                 goto failed_send;
1117
1118         req->handler = zfcp_fsf_send_ct_handler;
1119         req->qtcb->header.port_handle = wka_port->handle;
1120         req->data = ct;
1121
1122         zfcp_dbf_san_ct_request(req, wka_port->d_id);
1123
1124         ret = zfcp_fsf_req_send(req);
1125         if (ret)
1126                 goto failed_send;
1127
1128         goto out;
1129
1130 failed_send:
1131         zfcp_fsf_req_free(req);
1132 out:
1133         spin_unlock_bh(&qdio->req_q_lock);
1134         return ret;
1135 }
1136
1137 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1138 {
1139         struct zfcp_fsf_ct_els *send_els = req->data;
1140         struct zfcp_port *port = send_els->port;
1141         struct fsf_qtcb_header *header = &req->qtcb->header;
1142
1143         send_els->status = -EINVAL;
1144
1145         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1146                 goto skip_fsfstatus;
1147
1148         switch (header->fsf_status) {
1149         case FSF_GOOD:
1150                 zfcp_dbf_san_els_response(req);
1151                 send_els->status = 0;
1152                 break;
1153         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1154                 zfcp_fsf_class_not_supp(req);
1155                 break;
1156         case FSF_ADAPTER_STATUS_AVAILABLE:
1157                 switch (header->fsf_status_qual.word[0]){
1158                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1159                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1160                 case FSF_SQ_RETRY_IF_POSSIBLE:
1161                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1162                         break;
1163                 }
1164                 break;
1165         case FSF_ELS_COMMAND_REJECTED:
1166         case FSF_PAYLOAD_SIZE_MISMATCH:
1167         case FSF_REQUEST_SIZE_TOO_LARGE:
1168         case FSF_RESPONSE_SIZE_TOO_LARGE:
1169                 break;
1170         case FSF_ACCESS_DENIED:
1171                 if (port)
1172                         zfcp_fsf_access_denied_port(req, port);
1173                 break;
1174         case FSF_SBAL_MISMATCH:
1175                 /* should never occure, avoided in zfcp_fsf_send_els */
1176                 /* fall through */
1177         default:
1178                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1179                 break;
1180         }
1181 skip_fsfstatus:
1182         if (send_els->handler)
1183                 send_els->handler(send_els->handler_data);
1184 }
1185
1186 /**
1187  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1188  * @els: pointer to struct zfcp_send_els with data for the command
1189  */
1190 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1191                       struct zfcp_fsf_ct_els *els)
1192 {
1193         struct zfcp_fsf_req *req;
1194         struct zfcp_qdio *qdio = adapter->qdio;
1195         int ret = -EIO;
1196
1197         spin_lock_bh(&qdio->req_q_lock);
1198         if (zfcp_fsf_req_sbal_get(qdio))
1199                 goto out;
1200
1201         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1202
1203         if (IS_ERR(req)) {
1204                 ret = PTR_ERR(req);
1205                 goto out;
1206         }
1207
1208         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1209         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
1210
1211         if (ret)
1212                 goto failed_send;
1213
1214         hton24(req->qtcb->bottom.support.d_id, d_id);
1215         req->handler = zfcp_fsf_send_els_handler;
1216         req->data = els;
1217
1218         zfcp_dbf_san_els_request(req);
1219
1220         ret = zfcp_fsf_req_send(req);
1221         if (ret)
1222                 goto failed_send;
1223
1224         goto out;
1225
1226 failed_send:
1227         zfcp_fsf_req_free(req);
1228 out:
1229         spin_unlock_bh(&qdio->req_q_lock);
1230         return ret;
1231 }
1232
1233 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1234 {
1235         struct qdio_buffer_element *sbale;
1236         struct zfcp_fsf_req *req;
1237         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1238         int retval = -EIO;
1239
1240         spin_lock_bh(&qdio->req_q_lock);
1241         if (zfcp_fsf_req_sbal_get(qdio))
1242                 goto out;
1243
1244         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1245                                   qdio->adapter->pool.erp_req);
1246
1247         if (IS_ERR(req)) {
1248                 retval = PTR_ERR(req);
1249                 goto out;
1250         }
1251
1252         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1253         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1254         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1255         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1256
1257         req->qtcb->bottom.config.feature_selection =
1258                         FSF_FEATURE_CFDC |
1259                         FSF_FEATURE_LUN_SHARING |
1260                         FSF_FEATURE_NOTIFICATION_LOST |
1261                         FSF_FEATURE_UPDATE_ALERT;
1262         req->erp_action = erp_action;
1263         req->handler = zfcp_fsf_exchange_config_data_handler;
1264         erp_action->fsf_req = req;
1265
1266         zfcp_fsf_start_erp_timer(req);
1267         retval = zfcp_fsf_req_send(req);
1268         if (retval) {
1269                 zfcp_fsf_req_free(req);
1270                 erp_action->fsf_req = NULL;
1271         }
1272 out:
1273         spin_unlock_bh(&qdio->req_q_lock);
1274         return retval;
1275 }
1276
1277 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1278                                        struct fsf_qtcb_bottom_config *data)
1279 {
1280         struct qdio_buffer_element *sbale;
1281         struct zfcp_fsf_req *req = NULL;
1282         int retval = -EIO;
1283
1284         spin_lock_bh(&qdio->req_q_lock);
1285         if (zfcp_fsf_req_sbal_get(qdio))
1286                 goto out_unlock;
1287
1288         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1289
1290         if (IS_ERR(req)) {
1291                 retval = PTR_ERR(req);
1292                 goto out_unlock;
1293         }
1294
1295         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1296         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1297         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1298         req->handler = zfcp_fsf_exchange_config_data_handler;
1299
1300         req->qtcb->bottom.config.feature_selection =
1301                         FSF_FEATURE_CFDC |
1302                         FSF_FEATURE_LUN_SHARING |
1303                         FSF_FEATURE_NOTIFICATION_LOST |
1304                         FSF_FEATURE_UPDATE_ALERT;
1305
1306         if (data)
1307                 req->data = data;
1308
1309         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1310         retval = zfcp_fsf_req_send(req);
1311         spin_unlock_bh(&qdio->req_q_lock);
1312         if (!retval)
1313                 wait_for_completion(&req->completion);
1314
1315         zfcp_fsf_req_free(req);
1316         return retval;
1317
1318 out_unlock:
1319         spin_unlock_bh(&qdio->req_q_lock);
1320         return retval;
1321 }
1322
1323 /**
1324  * zfcp_fsf_exchange_port_data - request information about local port
1325  * @erp_action: ERP action for the adapter for which port data is requested
1326  * Returns: 0 on success, error otherwise
1327  */
1328 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1329 {
1330         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1331         struct qdio_buffer_element *sbale;
1332         struct zfcp_fsf_req *req;
1333         int retval = -EIO;
1334
1335         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1336                 return -EOPNOTSUPP;
1337
1338         spin_lock_bh(&qdio->req_q_lock);
1339         if (zfcp_fsf_req_sbal_get(qdio))
1340                 goto out;
1341
1342         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1343                                   qdio->adapter->pool.erp_req);
1344
1345         if (IS_ERR(req)) {
1346                 retval = PTR_ERR(req);
1347                 goto out;
1348         }
1349
1350         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1351         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1352         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1353         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1354
1355         req->handler = zfcp_fsf_exchange_port_data_handler;
1356         req->erp_action = erp_action;
1357         erp_action->fsf_req = req;
1358
1359         zfcp_fsf_start_erp_timer(req);
1360         retval = zfcp_fsf_req_send(req);
1361         if (retval) {
1362                 zfcp_fsf_req_free(req);
1363                 erp_action->fsf_req = NULL;
1364         }
1365 out:
1366         spin_unlock_bh(&qdio->req_q_lock);
1367         return retval;
1368 }
1369
1370 /**
1371  * zfcp_fsf_exchange_port_data_sync - request information about local port
1372  * @qdio: pointer to struct zfcp_qdio
1373  * @data: pointer to struct fsf_qtcb_bottom_port
1374  * Returns: 0 on success, error otherwise
1375  */
1376 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1377                                      struct fsf_qtcb_bottom_port *data)
1378 {
1379         struct qdio_buffer_element *sbale;
1380         struct zfcp_fsf_req *req = NULL;
1381         int retval = -EIO;
1382
1383         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1384                 return -EOPNOTSUPP;
1385
1386         spin_lock_bh(&qdio->req_q_lock);
1387         if (zfcp_fsf_req_sbal_get(qdio))
1388                 goto out_unlock;
1389
1390         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1391
1392         if (IS_ERR(req)) {
1393                 retval = PTR_ERR(req);
1394                 goto out_unlock;
1395         }
1396
1397         if (data)
1398                 req->data = data;
1399
1400         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1401         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1402         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1403
1404         req->handler = zfcp_fsf_exchange_port_data_handler;
1405         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1406         retval = zfcp_fsf_req_send(req);
1407         spin_unlock_bh(&qdio->req_q_lock);
1408
1409         if (!retval)
1410                 wait_for_completion(&req->completion);
1411
1412         zfcp_fsf_req_free(req);
1413
1414         return retval;
1415
1416 out_unlock:
1417         spin_unlock_bh(&qdio->req_q_lock);
1418         return retval;
1419 }
1420
1421 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1422 {
1423         struct zfcp_port *port = req->data;
1424         struct fsf_qtcb_header *header = &req->qtcb->header;
1425         struct fc_els_flogi *plogi;
1426
1427         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1428                 goto out;
1429
1430         switch (header->fsf_status) {
1431         case FSF_PORT_ALREADY_OPEN:
1432                 break;
1433         case FSF_ACCESS_DENIED:
1434                 zfcp_fsf_access_denied_port(req, port);
1435                 break;
1436         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1437                 dev_warn(&req->adapter->ccw_device->dev,
1438                          "Not enough FCP adapter resources to open "
1439                          "remote port 0x%016Lx\n",
1440                          (unsigned long long)port->wwpn);
1441                 zfcp_erp_port_failed(port, "fsoph_1", req);
1442                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1443                 break;
1444         case FSF_ADAPTER_STATUS_AVAILABLE:
1445                 switch (header->fsf_status_qual.word[0]) {
1446                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1447                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1448                 case FSF_SQ_NO_RETRY_POSSIBLE:
1449                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1450                         break;
1451                 }
1452                 break;
1453         case FSF_GOOD:
1454                 port->handle = header->port_handle;
1455                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1456                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1457                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1458                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1459                                   &port->status);
1460                 /* check whether D_ID has changed during open */
1461                 /*
1462                  * FIXME: This check is not airtight, as the FCP channel does
1463                  * not monitor closures of target port connections caused on
1464                  * the remote side. Thus, they might miss out on invalidating
1465                  * locally cached WWPNs (and other N_Port parameters) of gone
1466                  * target ports. So, our heroic attempt to make things safe
1467                  * could be undermined by 'open port' response data tagged with
1468                  * obsolete WWPNs. Another reason to monitor potential
1469                  * connection closures ourself at least (by interpreting
1470                  * incoming ELS' and unsolicited status). It just crosses my
1471                  * mind that one should be able to cross-check by means of
1472                  * another GID_PN straight after a port has been opened.
1473                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1474                  */
1475                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1476                 if (req->qtcb->bottom.support.els1_length >=
1477                     FSF_PLOGI_MIN_LEN)
1478                                 zfcp_fc_plogi_evaluate(port, plogi);
1479                 break;
1480         case FSF_UNKNOWN_OP_SUBTYPE:
1481                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1482                 break;
1483         }
1484
1485 out:
1486         put_device(&port->sysfs_device);
1487 }
1488
1489 /**
1490  * zfcp_fsf_open_port - create and send open port request
1491  * @erp_action: pointer to struct zfcp_erp_action
1492  * Returns: 0 on success, error otherwise
1493  */
1494 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1495 {
1496         struct qdio_buffer_element *sbale;
1497         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1498         struct zfcp_port *port = erp_action->port;
1499         struct zfcp_fsf_req *req;
1500         int retval = -EIO;
1501
1502         spin_lock_bh(&qdio->req_q_lock);
1503         if (zfcp_fsf_req_sbal_get(qdio))
1504                 goto out;
1505
1506         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1507                                   qdio->adapter->pool.erp_req);
1508
1509         if (IS_ERR(req)) {
1510                 retval = PTR_ERR(req);
1511                 goto out;
1512         }
1513
1514         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1515         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1516         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1517         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1518
1519         req->handler = zfcp_fsf_open_port_handler;
1520         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1521         req->data = port;
1522         req->erp_action = erp_action;
1523         erp_action->fsf_req = req;
1524         get_device(&port->sysfs_device);
1525
1526         zfcp_fsf_start_erp_timer(req);
1527         retval = zfcp_fsf_req_send(req);
1528         if (retval) {
1529                 zfcp_fsf_req_free(req);
1530                 erp_action->fsf_req = NULL;
1531                 put_device(&port->sysfs_device);
1532         }
1533 out:
1534         spin_unlock_bh(&qdio->req_q_lock);
1535         return retval;
1536 }
1537
1538 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1539 {
1540         struct zfcp_port *port = req->data;
1541
1542         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1543                 return;
1544
1545         switch (req->qtcb->header.fsf_status) {
1546         case FSF_PORT_HANDLE_NOT_VALID:
1547                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1548                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1549                 break;
1550         case FSF_ADAPTER_STATUS_AVAILABLE:
1551                 break;
1552         case FSF_GOOD:
1553                 zfcp_erp_modify_port_status(port, "fscph_2", req,
1554                                             ZFCP_STATUS_COMMON_OPEN,
1555                                             ZFCP_CLEAR);
1556                 break;
1557         }
1558 }
1559
1560 /**
1561  * zfcp_fsf_close_port - create and send close port request
1562  * @erp_action: pointer to struct zfcp_erp_action
1563  * Returns: 0 on success, error otherwise
1564  */
1565 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1566 {
1567         struct qdio_buffer_element *sbale;
1568         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1569         struct zfcp_fsf_req *req;
1570         int retval = -EIO;
1571
1572         spin_lock_bh(&qdio->req_q_lock);
1573         if (zfcp_fsf_req_sbal_get(qdio))
1574                 goto out;
1575
1576         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1577                                   qdio->adapter->pool.erp_req);
1578
1579         if (IS_ERR(req)) {
1580                 retval = PTR_ERR(req);
1581                 goto out;
1582         }
1583
1584         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1585         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1586         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1587         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1588
1589         req->handler = zfcp_fsf_close_port_handler;
1590         req->data = erp_action->port;
1591         req->erp_action = erp_action;
1592         req->qtcb->header.port_handle = erp_action->port->handle;
1593         erp_action->fsf_req = req;
1594
1595         zfcp_fsf_start_erp_timer(req);
1596         retval = zfcp_fsf_req_send(req);
1597         if (retval) {
1598                 zfcp_fsf_req_free(req);
1599                 erp_action->fsf_req = NULL;
1600         }
1601 out:
1602         spin_unlock_bh(&qdio->req_q_lock);
1603         return retval;
1604 }
1605
1606 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1607 {
1608         struct zfcp_fc_wka_port *wka_port = req->data;
1609         struct fsf_qtcb_header *header = &req->qtcb->header;
1610
1611         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1612                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1613                 goto out;
1614         }
1615
1616         switch (header->fsf_status) {
1617         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1618                 dev_warn(&req->adapter->ccw_device->dev,
1619                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1620                 /* fall through */
1621         case FSF_ADAPTER_STATUS_AVAILABLE:
1622                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1623                 /* fall through */
1624         case FSF_ACCESS_DENIED:
1625                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1626                 break;
1627         case FSF_GOOD:
1628                 wka_port->handle = header->port_handle;
1629                 /* fall through */
1630         case FSF_PORT_ALREADY_OPEN:
1631                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1632         }
1633 out:
1634         wake_up(&wka_port->completion_wq);
1635 }
1636
1637 /**
1638  * zfcp_fsf_open_wka_port - create and send open wka-port request
1639  * @wka_port: pointer to struct zfcp_fc_wka_port
1640  * Returns: 0 on success, error otherwise
1641  */
1642 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1643 {
1644         struct qdio_buffer_element *sbale;
1645         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1646         struct zfcp_fsf_req *req;
1647         int retval = -EIO;
1648
1649         spin_lock_bh(&qdio->req_q_lock);
1650         if (zfcp_fsf_req_sbal_get(qdio))
1651                 goto out;
1652
1653         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1654                                   qdio->adapter->pool.erp_req);
1655
1656         if (unlikely(IS_ERR(req))) {
1657                 retval = PTR_ERR(req);
1658                 goto out;
1659         }
1660
1661         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1662         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1663         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1664         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1665
1666         req->handler = zfcp_fsf_open_wka_port_handler;
1667         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1668         req->data = wka_port;
1669
1670         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1671         retval = zfcp_fsf_req_send(req);
1672         if (retval)
1673                 zfcp_fsf_req_free(req);
1674 out:
1675         spin_unlock_bh(&qdio->req_q_lock);
1676         return retval;
1677 }
1678
1679 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1680 {
1681         struct zfcp_fc_wka_port *wka_port = req->data;
1682
1683         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1684                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1685                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1686         }
1687
1688         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1689         wake_up(&wka_port->completion_wq);
1690 }
1691
1692 /**
1693  * zfcp_fsf_close_wka_port - create and send close wka port request
1694  * @wka_port: WKA port to open
1695  * Returns: 0 on success, error otherwise
1696  */
1697 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1698 {
1699         struct qdio_buffer_element *sbale;
1700         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1701         struct zfcp_fsf_req *req;
1702         int retval = -EIO;
1703
1704         spin_lock_bh(&qdio->req_q_lock);
1705         if (zfcp_fsf_req_sbal_get(qdio))
1706                 goto out;
1707
1708         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1709                                   qdio->adapter->pool.erp_req);
1710
1711         if (unlikely(IS_ERR(req))) {
1712                 retval = PTR_ERR(req);
1713                 goto out;
1714         }
1715
1716         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1717         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1718         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1719         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1720
1721         req->handler = zfcp_fsf_close_wka_port_handler;
1722         req->data = wka_port;
1723         req->qtcb->header.port_handle = wka_port->handle;
1724
1725         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1726         retval = zfcp_fsf_req_send(req);
1727         if (retval)
1728                 zfcp_fsf_req_free(req);
1729 out:
1730         spin_unlock_bh(&qdio->req_q_lock);
1731         return retval;
1732 }
1733
1734 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1735 {
1736         struct zfcp_port *port = req->data;
1737         struct fsf_qtcb_header *header = &req->qtcb->header;
1738         struct zfcp_unit *unit;
1739
1740         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1741                 return;
1742
1743         switch (header->fsf_status) {
1744         case FSF_PORT_HANDLE_NOT_VALID:
1745                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1746                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1747                 break;
1748         case FSF_ACCESS_DENIED:
1749                 zfcp_fsf_access_denied_port(req, port);
1750                 break;
1751         case FSF_PORT_BOXED:
1752                 /* can't use generic zfcp_erp_modify_port_status because
1753                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1754                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1755                 read_lock(&port->unit_list_lock);
1756                 list_for_each_entry(unit, &port->unit_list, list)
1757                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1758                                           &unit->status);
1759                 read_unlock(&port->unit_list_lock);
1760                 zfcp_erp_port_boxed(port, "fscpph2", req);
1761                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1762                 break;
1763         case FSF_ADAPTER_STATUS_AVAILABLE:
1764                 switch (header->fsf_status_qual.word[0]) {
1765                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1766                         /* fall through */
1767                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1768                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1769                         break;
1770                 }
1771                 break;
1772         case FSF_GOOD:
1773                 /* can't use generic zfcp_erp_modify_port_status because
1774                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1775                  */
1776                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1777                 read_lock(&port->unit_list_lock);
1778                 list_for_each_entry(unit, &port->unit_list, list)
1779                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1780                                           &unit->status);
1781                 read_unlock(&port->unit_list_lock);
1782                 break;
1783         }
1784 }
1785
1786 /**
1787  * zfcp_fsf_close_physical_port - close physical port
1788  * @erp_action: pointer to struct zfcp_erp_action
1789  * Returns: 0 on success
1790  */
1791 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1792 {
1793         struct qdio_buffer_element *sbale;
1794         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1795         struct zfcp_fsf_req *req;
1796         int retval = -EIO;
1797
1798         spin_lock_bh(&qdio->req_q_lock);
1799         if (zfcp_fsf_req_sbal_get(qdio))
1800                 goto out;
1801
1802         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1803                                   qdio->adapter->pool.erp_req);
1804
1805         if (IS_ERR(req)) {
1806                 retval = PTR_ERR(req);
1807                 goto out;
1808         }
1809
1810         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1811         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1812         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1813         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1814
1815         req->data = erp_action->port;
1816         req->qtcb->header.port_handle = erp_action->port->handle;
1817         req->erp_action = erp_action;
1818         req->handler = zfcp_fsf_close_physical_port_handler;
1819         erp_action->fsf_req = req;
1820
1821         zfcp_fsf_start_erp_timer(req);
1822         retval = zfcp_fsf_req_send(req);
1823         if (retval) {
1824                 zfcp_fsf_req_free(req);
1825                 erp_action->fsf_req = NULL;
1826         }
1827 out:
1828         spin_unlock_bh(&qdio->req_q_lock);
1829         return retval;
1830 }
1831
1832 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1833 {
1834         struct zfcp_adapter *adapter = req->adapter;
1835         struct zfcp_unit *unit = req->data;
1836         struct fsf_qtcb_header *header = &req->qtcb->header;
1837         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1838         struct fsf_queue_designator *queue_designator =
1839                                 &header->fsf_status_qual.fsf_queue_designator;
1840         int exclusive, readwrite;
1841
1842         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1843                 return;
1844
1845         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1846                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1847                           ZFCP_STATUS_UNIT_SHARED |
1848                           ZFCP_STATUS_UNIT_READONLY,
1849                           &unit->status);
1850
1851         switch (header->fsf_status) {
1852
1853         case FSF_PORT_HANDLE_NOT_VALID:
1854                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1855                 /* fall through */
1856         case FSF_LUN_ALREADY_OPEN:
1857                 break;
1858         case FSF_ACCESS_DENIED:
1859                 zfcp_fsf_access_denied_unit(req, unit);
1860                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1861                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1862                 break;
1863         case FSF_PORT_BOXED:
1864                 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1865                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1866                 break;
1867         case FSF_LUN_SHARING_VIOLATION:
1868                 if (header->fsf_status_qual.word[0])
1869                         dev_warn(&adapter->ccw_device->dev,
1870                                  "LUN 0x%Lx on port 0x%Lx is already in "
1871                                  "use by CSS%d, MIF Image ID %x\n",
1872                                  (unsigned long long)unit->fcp_lun,
1873                                  (unsigned long long)unit->port->wwpn,
1874                                  queue_designator->cssid,
1875                                  queue_designator->hla);
1876                 else
1877                         zfcp_act_eval_err(adapter,
1878                                           header->fsf_status_qual.word[2]);
1879                 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1880                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1881                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1882                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1883                 break;
1884         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1885                 dev_warn(&adapter->ccw_device->dev,
1886                          "No handle is available for LUN "
1887                          "0x%016Lx on port 0x%016Lx\n",
1888                          (unsigned long long)unit->fcp_lun,
1889                          (unsigned long long)unit->port->wwpn);
1890                 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1891                 /* fall through */
1892         case FSF_INVALID_COMMAND_OPTION:
1893                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1894                 break;
1895         case FSF_ADAPTER_STATUS_AVAILABLE:
1896                 switch (header->fsf_status_qual.word[0]) {
1897                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1898                         zfcp_fc_test_link(unit->port);
1899                         /* fall through */
1900                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1901                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1902                         break;
1903                 }
1904                 break;
1905
1906         case FSF_GOOD:
1907                 unit->handle = header->lun_handle;
1908                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1909
1910                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1911                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1912                     !zfcp_ccw_priv_sch(adapter)) {
1913                         exclusive = (bottom->lun_access_info &
1914                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1915                         readwrite = (bottom->lun_access_info &
1916                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1917
1918                         if (!exclusive)
1919                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1920                                                 &unit->status);
1921
1922                         if (!readwrite) {
1923                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1924                                                 &unit->status);
1925                                 dev_info(&adapter->ccw_device->dev,
1926                                          "SCSI device at LUN 0x%016Lx on port "
1927                                          "0x%016Lx opened read-only\n",
1928                                          (unsigned long long)unit->fcp_lun,
1929                                          (unsigned long long)unit->port->wwpn);
1930                         }
1931
1932                         if (exclusive && !readwrite) {
1933                                 dev_err(&adapter->ccw_device->dev,
1934                                         "Exclusive read-only access not "
1935                                         "supported (unit 0x%016Lx, "
1936                                         "port 0x%016Lx)\n",
1937                                         (unsigned long long)unit->fcp_lun,
1938                                         (unsigned long long)unit->port->wwpn);
1939                                 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1940                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1941                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1942                         } else if (!exclusive && readwrite) {
1943                                 dev_err(&adapter->ccw_device->dev,
1944                                         "Shared read-write access not "
1945                                         "supported (unit 0x%016Lx, port "
1946                                         "0x%016Lx)\n",
1947                                         (unsigned long long)unit->fcp_lun,
1948                                         (unsigned long long)unit->port->wwpn);
1949                                 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1950                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1951                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1952                         }
1953                 }
1954                 break;
1955         }
1956 }
1957
1958 /**
1959  * zfcp_fsf_open_unit - open unit
1960  * @erp_action: pointer to struct zfcp_erp_action
1961  * Returns: 0 on success, error otherwise
1962  */
1963 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1964 {
1965         struct qdio_buffer_element *sbale;
1966         struct zfcp_adapter *adapter = erp_action->adapter;
1967         struct zfcp_qdio *qdio = adapter->qdio;
1968         struct zfcp_fsf_req *req;
1969         int retval = -EIO;
1970
1971         spin_lock_bh(&qdio->req_q_lock);
1972         if (zfcp_fsf_req_sbal_get(qdio))
1973                 goto out;
1974
1975         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1976                                   adapter->pool.erp_req);
1977
1978         if (IS_ERR(req)) {
1979                 retval = PTR_ERR(req);
1980                 goto out;
1981         }
1982
1983         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1984         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1985         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1986         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1987
1988         req->qtcb->header.port_handle = erp_action->port->handle;
1989         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1990         req->handler = zfcp_fsf_open_unit_handler;
1991         req->data = erp_action->unit;
1992         req->erp_action = erp_action;
1993         erp_action->fsf_req = req;
1994
1995         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1996                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1997
1998         zfcp_fsf_start_erp_timer(req);
1999         retval = zfcp_fsf_req_send(req);
2000         if (retval) {
2001                 zfcp_fsf_req_free(req);
2002                 erp_action->fsf_req = NULL;
2003         }
2004 out:
2005         spin_unlock_bh(&qdio->req_q_lock);
2006         return retval;
2007 }
2008
2009 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2010 {
2011         struct zfcp_unit *unit = req->data;
2012
2013         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2014                 return;
2015
2016         switch (req->qtcb->header.fsf_status) {
2017         case FSF_PORT_HANDLE_NOT_VALID:
2018                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2019                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2020                 break;
2021         case FSF_LUN_HANDLE_NOT_VALID:
2022                 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2023                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2024                 break;
2025         case FSF_PORT_BOXED:
2026                 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2027                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2028                 break;
2029         case FSF_ADAPTER_STATUS_AVAILABLE:
2030                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2031                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2032                         zfcp_fc_test_link(unit->port);
2033                         /* fall through */
2034                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2035                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2036                         break;
2037                 }
2038                 break;
2039         case FSF_GOOD:
2040                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2041                 break;
2042         }
2043 }
2044
2045 /**
2046  * zfcp_fsf_close_unit - close zfcp unit
2047  * @erp_action: pointer to struct zfcp_unit
2048  * Returns: 0 on success, error otherwise
2049  */
2050 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2051 {
2052         struct qdio_buffer_element *sbale;
2053         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2054         struct zfcp_fsf_req *req;
2055         int retval = -EIO;
2056
2057         spin_lock_bh(&qdio->req_q_lock);
2058         if (zfcp_fsf_req_sbal_get(qdio))
2059                 goto out;
2060
2061         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2062                                   qdio->adapter->pool.erp_req);
2063
2064         if (IS_ERR(req)) {
2065                 retval = PTR_ERR(req);
2066                 goto out;
2067         }
2068
2069         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2070         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2071         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2072         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2073
2074         req->qtcb->header.port_handle = erp_action->port->handle;
2075         req->qtcb->header.lun_handle = erp_action->unit->handle;
2076         req->handler = zfcp_fsf_close_unit_handler;
2077         req->data = erp_action->unit;
2078         req->erp_action = erp_action;
2079         erp_action->fsf_req = req;
2080
2081         zfcp_fsf_start_erp_timer(req);
2082         retval = zfcp_fsf_req_send(req);
2083         if (retval) {
2084                 zfcp_fsf_req_free(req);
2085                 erp_action->fsf_req = NULL;
2086         }
2087 out:
2088         spin_unlock_bh(&qdio->req_q_lock);
2089         return retval;
2090 }
2091
2092 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2093 {
2094         lat_rec->sum += lat;
2095         lat_rec->min = min(lat_rec->min, lat);
2096         lat_rec->max = max(lat_rec->max, lat);
2097 }
2098
2099 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2100 {
2101         struct fsf_qual_latency_info *lat_in;
2102         struct latency_cont *lat = NULL;
2103         struct zfcp_unit *unit = req->unit;
2104         struct zfcp_blk_drv_data blktrc;
2105         int ticks = req->adapter->timer_ticks;
2106
2107         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2108
2109         blktrc.flags = 0;
2110         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2111         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2112                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2113         blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2114         blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2115
2116         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2117                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2118                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2119                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2120
2121                 switch (req->qtcb->bottom.io.data_direction) {
2122                 case FSF_DATADIR_READ:
2123                         lat = &unit->latencies.read;
2124                         break;
2125                 case FSF_DATADIR_WRITE:
2126                         lat = &unit->latencies.write;
2127                         break;
2128                 case FSF_DATADIR_CMND:
2129                         lat = &unit->latencies.cmd;
2130                         break;
2131                 }
2132
2133                 if (lat) {
2134                         spin_lock(&unit->latencies.lock);
2135                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2136                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2137                         lat->counter++;
2138                         spin_unlock(&unit->latencies.lock);
2139                 }
2140         }
2141
2142         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2143                             sizeof(blktrc));
2144 }
2145
2146 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2147 {
2148         struct scsi_cmnd *scpnt;
2149         struct fcp_resp_with_ext *fcp_rsp;
2150         unsigned long flags;
2151
2152         read_lock_irqsave(&req->adapter->abort_lock, flags);
2153
2154         scpnt = req->data;
2155         if (unlikely(!scpnt)) {
2156                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2157                 return;
2158         }
2159
2160         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2161                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2162                 goto skip_fsfstatus;
2163         }
2164
2165         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2166         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2167
2168         zfcp_fsf_req_trace(req, scpnt);
2169
2170 skip_fsfstatus:
2171         if (scpnt->result != 0)
2172                 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2173         else if (scpnt->retries > 0)
2174                 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2175         else
2176                 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2177
2178         scpnt->host_scribble = NULL;
2179         (scpnt->scsi_done) (scpnt);
2180         /*
2181          * We must hold this lock until scsi_done has been called.
2182          * Otherwise we may call scsi_done after abort regarding this
2183          * command has completed.
2184          * Note: scsi_done must not block!
2185          */
2186         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2187 }
2188
2189 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2190 {
2191         struct fcp_resp_with_ext *fcp_rsp;
2192         struct fcp_resp_rsp_info *rsp_info;
2193
2194         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2195         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2196
2197         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2198              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2199                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2200 }
2201
2202
2203 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2204 {
2205         struct zfcp_unit *unit;
2206         struct fsf_qtcb_header *header = &req->qtcb->header;
2207
2208         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2209                 unit = req->data;
2210         else
2211                 unit = req->unit;
2212
2213         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2214                 goto skip_fsfstatus;
2215
2216         switch (header->fsf_status) {
2217         case FSF_HANDLE_MISMATCH:
2218         case FSF_PORT_HANDLE_NOT_VALID:
2219                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2220                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2221                 break;
2222         case FSF_FCPLUN_NOT_VALID:
2223         case FSF_LUN_HANDLE_NOT_VALID:
2224                 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2225                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2226                 break;
2227         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2228                 zfcp_fsf_class_not_supp(req);
2229                 break;
2230         case FSF_ACCESS_DENIED:
2231                 zfcp_fsf_access_denied_unit(req, unit);
2232                 break;
2233         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2234                 dev_err(&req->adapter->ccw_device->dev,
2235                         "Incorrect direction %d, unit 0x%016Lx on port "
2236                         "0x%016Lx closed\n",
2237                         req->qtcb->bottom.io.data_direction,
2238                         (unsigned long long)unit->fcp_lun,
2239                         (unsigned long long)unit->port->wwpn);
2240                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2241                                           req);
2242                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2243                 break;
2244         case FSF_CMND_LENGTH_NOT_VALID:
2245                 dev_err(&req->adapter->ccw_device->dev,
2246                         "Incorrect CDB length %d, unit 0x%016Lx on "
2247                         "port 0x%016Lx closed\n",
2248                         req->qtcb->bottom.io.fcp_cmnd_length,
2249                         (unsigned long long)unit->fcp_lun,
2250                         (unsigned long long)unit->port->wwpn);
2251                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2252                                           req);
2253                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2254                 break;
2255         case FSF_PORT_BOXED:
2256                 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2257                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2258                 break;
2259         case FSF_LUN_BOXED:
2260                 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2261                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2262                 break;
2263         case FSF_ADAPTER_STATUS_AVAILABLE:
2264                 if (header->fsf_status_qual.word[0] ==
2265                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2266                         zfcp_fc_test_link(unit->port);
2267                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2268                 break;
2269         }
2270 skip_fsfstatus:
2271         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2272                 zfcp_fsf_send_fcp_ctm_handler(req);
2273         else {
2274                 zfcp_fsf_send_fcp_command_task_handler(req);
2275                 req->unit = NULL;
2276                 put_device(&unit->sysfs_device);
2277         }
2278 }
2279
2280 /**
2281  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2282  * @unit: unit where command is sent to
2283  * @scsi_cmnd: scsi command to be sent
2284  */
2285 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2286                                    struct scsi_cmnd *scsi_cmnd)
2287 {
2288         struct zfcp_fsf_req *req;
2289         struct fcp_cmnd *fcp_cmnd;
2290         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2291         int real_bytes, retval = -EIO;
2292         struct zfcp_adapter *adapter = unit->port->adapter;
2293         struct zfcp_qdio *qdio = adapter->qdio;
2294
2295         if (unlikely(!(atomic_read(&unit->status) &
2296                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2297                 return -EBUSY;
2298
2299         spin_lock(&qdio->req_q_lock);
2300         if (atomic_read(&qdio->req_q.count) <= 0) {
2301                 atomic_inc(&qdio->req_q_full);
2302                 goto out;
2303         }
2304
2305         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2306                                   adapter->pool.scsi_req);
2307
2308         if (IS_ERR(req)) {
2309                 retval = PTR_ERR(req);
2310                 goto out;
2311         }
2312
2313         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2314         get_device(&unit->sysfs_device);
2315         req->unit = unit;
2316         req->data = scsi_cmnd;
2317         req->handler = zfcp_fsf_send_fcp_command_handler;
2318         req->qtcb->header.lun_handle = unit->handle;
2319         req->qtcb->header.port_handle = unit->port->handle;
2320         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2321         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2322
2323         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2324
2325         /*
2326          * set depending on data direction:
2327          *      data direction bits in SBALE (SB Type)
2328          *      data direction bits in QTCB
2329          */
2330         switch (scsi_cmnd->sc_data_direction) {
2331         case DMA_NONE:
2332                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2333                 break;
2334         case DMA_FROM_DEVICE:
2335                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2336                 break;
2337         case DMA_TO_DEVICE:
2338                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2339                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2340                 break;
2341         case DMA_BIDIRECTIONAL:
2342                 goto failed_scsi_cmnd;
2343         }
2344
2345         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2346         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2347
2348         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2349                                              scsi_sglist(scsi_cmnd),
2350                                              FSF_MAX_SBALS_PER_REQ);
2351         if (unlikely(real_bytes < 0)) {
2352                 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2353                         dev_err(&adapter->ccw_device->dev,
2354                                 "Oversize data package, unit 0x%016Lx "
2355                                 "on port 0x%016Lx closed\n",
2356                                 (unsigned long long)unit->fcp_lun,
2357                                 (unsigned long long)unit->port->wwpn);
2358                         zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2359                         retval = -EINVAL;
2360                 }
2361                 goto failed_scsi_cmnd;
2362         }
2363
2364         retval = zfcp_fsf_req_send(req);
2365         if (unlikely(retval))
2366                 goto failed_scsi_cmnd;
2367
2368         goto out;
2369
2370 failed_scsi_cmnd:
2371         put_device(&unit->sysfs_device);
2372         zfcp_fsf_req_free(req);
2373         scsi_cmnd->host_scribble = NULL;
2374 out:
2375         spin_unlock(&qdio->req_q_lock);
2376         return retval;
2377 }
2378
2379 /**
2380  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2381  * @unit: pointer to struct zfcp_unit
2382  * @tm_flags: unsigned byte for task management flags
2383  * Returns: on success pointer to struct fsf_req, NULL otherwise
2384  */
2385 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2386 {
2387         struct qdio_buffer_element *sbale;
2388         struct zfcp_fsf_req *req = NULL;
2389         struct fcp_cmnd *fcp_cmnd;
2390         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2391
2392         if (unlikely(!(atomic_read(&unit->status) &
2393                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2394                 return NULL;
2395
2396         spin_lock_bh(&qdio->req_q_lock);
2397         if (zfcp_fsf_req_sbal_get(qdio))
2398                 goto out;
2399
2400         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2401                                   qdio->adapter->pool.scsi_req);
2402
2403         if (IS_ERR(req)) {
2404                 req = NULL;
2405                 goto out;
2406         }
2407
2408         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2409         req->data = unit;
2410         req->handler = zfcp_fsf_send_fcp_command_handler;
2411         req->qtcb->header.lun_handle = unit->handle;
2412         req->qtcb->header.port_handle = unit->port->handle;
2413         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2414         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2415         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2416
2417         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2418         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2419         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2420
2421         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2422         zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2423
2424         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2425         if (!zfcp_fsf_req_send(req))
2426                 goto out;
2427
2428         zfcp_fsf_req_free(req);
2429         req = NULL;
2430 out:
2431         spin_unlock_bh(&qdio->req_q_lock);
2432         return req;
2433 }
2434
2435 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2436 {
2437 }
2438
2439 /**
2440  * zfcp_fsf_control_file - control file upload/download
2441  * @adapter: pointer to struct zfcp_adapter
2442  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2443  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2444  */
2445 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2446                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2447 {
2448         struct qdio_buffer_element *sbale;
2449         struct zfcp_qdio *qdio = adapter->qdio;
2450         struct zfcp_fsf_req *req = NULL;
2451         struct fsf_qtcb_bottom_support *bottom;
2452         int direction, retval = -EIO, bytes;
2453
2454         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2455                 return ERR_PTR(-EOPNOTSUPP);
2456
2457         switch (fsf_cfdc->command) {
2458         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2459                 direction = SBAL_FLAGS0_TYPE_WRITE;
2460                 break;
2461         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2462                 direction = SBAL_FLAGS0_TYPE_READ;
2463                 break;
2464         default:
2465                 return ERR_PTR(-EINVAL);
2466         }
2467
2468         spin_lock_bh(&qdio->req_q_lock);
2469         if (zfcp_fsf_req_sbal_get(qdio))
2470                 goto out;
2471
2472         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2473         if (IS_ERR(req)) {
2474                 retval = -EPERM;
2475                 goto out;
2476         }
2477
2478         req->handler = zfcp_fsf_control_file_handler;
2479
2480         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2481         sbale[0].flags |= direction;
2482
2483         bottom = &req->qtcb->bottom.support;
2484         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2485         bottom->option = fsf_cfdc->option;
2486
2487         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2488                                         direction, fsf_cfdc->sg,
2489                                         FSF_MAX_SBALS_PER_REQ);
2490         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2491                 zfcp_fsf_req_free(req);
2492                 goto out;
2493         }
2494
2495         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2496         retval = zfcp_fsf_req_send(req);
2497 out:
2498         spin_unlock_bh(&qdio->req_q_lock);
2499
2500         if (!retval) {
2501                 wait_for_completion(&req->completion);
2502                 return req;
2503         }
2504         return ERR_PTR(retval);
2505 }
2506
2507 /**
2508  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2509  * @adapter: pointer to struct zfcp_adapter
2510  * @sbal_idx: response queue index of SBAL to be processed
2511  */
2512 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2513 {
2514         struct zfcp_adapter *adapter = qdio->adapter;
2515         struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2516         struct qdio_buffer_element *sbale;
2517         struct zfcp_fsf_req *fsf_req;
2518         unsigned long flags, req_id;
2519         int idx;
2520
2521         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2522
2523                 sbale = &sbal->element[idx];
2524                 req_id = (unsigned long) sbale->addr;
2525                 spin_lock_irqsave(&adapter->req_list_lock, flags);
2526                 fsf_req = zfcp_reqlist_find(adapter, req_id);
2527
2528                 if (!fsf_req)
2529                         /*
2530                          * Unknown request means that we have potentially memory
2531                          * corruption and must stop the machine immediately.
2532                          */
2533                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2534                               req_id, dev_name(&adapter->ccw_device->dev));
2535
2536                 list_del(&fsf_req->list);
2537                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2538
2539                 fsf_req->queue_req.sbal_response = sbal_idx;
2540                 fsf_req->queue_req.qdio_inb_usage =
2541                         atomic_read(&qdio->resp_q.count);
2542                 zfcp_fsf_req_complete(fsf_req);
2543
2544                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2545                         break;
2546         }
2547 }