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, unsigned int timeout)
1072 {
1073         int ret;
1074
1075         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1076         if (ret)
1077                 return ret;
1078
1079         /* common settings for ct/gs and els requests */
1080         if (timeout > 255)
1081                 timeout = 255; /* max value accepted by hardware */
1082         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1083         req->qtcb->bottom.support.timeout = timeout;
1084         zfcp_fsf_start_timer(req, (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                      unsigned int timeout)
1097 {
1098         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1099         struct zfcp_fsf_req *req;
1100         int ret = -EIO;
1101
1102         spin_lock_bh(&qdio->req_q_lock);
1103         if (zfcp_fsf_req_sbal_get(qdio))
1104                 goto out;
1105
1106         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1107
1108         if (IS_ERR(req)) {
1109                 ret = PTR_ERR(req);
1110                 goto out;
1111         }
1112
1113         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1114         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1115                                     FSF_MAX_SBALS_PER_REQ, timeout);
1116         if (ret)
1117                 goto failed_send;
1118
1119         req->handler = zfcp_fsf_send_ct_handler;
1120         req->qtcb->header.port_handle = wka_port->handle;
1121         req->data = ct;
1122
1123         zfcp_dbf_san_ct_request(req, wka_port->d_id);
1124
1125         ret = zfcp_fsf_req_send(req);
1126         if (ret)
1127                 goto failed_send;
1128
1129         goto out;
1130
1131 failed_send:
1132         zfcp_fsf_req_free(req);
1133 out:
1134         spin_unlock_bh(&qdio->req_q_lock);
1135         return ret;
1136 }
1137
1138 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1139 {
1140         struct zfcp_fsf_ct_els *send_els = req->data;
1141         struct zfcp_port *port = send_els->port;
1142         struct fsf_qtcb_header *header = &req->qtcb->header;
1143
1144         send_els->status = -EINVAL;
1145
1146         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1147                 goto skip_fsfstatus;
1148
1149         switch (header->fsf_status) {
1150         case FSF_GOOD:
1151                 zfcp_dbf_san_els_response(req);
1152                 send_els->status = 0;
1153                 break;
1154         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1155                 zfcp_fsf_class_not_supp(req);
1156                 break;
1157         case FSF_ADAPTER_STATUS_AVAILABLE:
1158                 switch (header->fsf_status_qual.word[0]){
1159                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1160                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1161                 case FSF_SQ_RETRY_IF_POSSIBLE:
1162                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1163                         break;
1164                 }
1165                 break;
1166         case FSF_ELS_COMMAND_REJECTED:
1167         case FSF_PAYLOAD_SIZE_MISMATCH:
1168         case FSF_REQUEST_SIZE_TOO_LARGE:
1169         case FSF_RESPONSE_SIZE_TOO_LARGE:
1170                 break;
1171         case FSF_ACCESS_DENIED:
1172                 if (port)
1173                         zfcp_fsf_access_denied_port(req, port);
1174                 break;
1175         case FSF_SBAL_MISMATCH:
1176                 /* should never occure, avoided in zfcp_fsf_send_els */
1177                 /* fall through */
1178         default:
1179                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1180                 break;
1181         }
1182 skip_fsfstatus:
1183         if (send_els->handler)
1184                 send_els->handler(send_els->handler_data);
1185 }
1186
1187 /**
1188  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1189  * @els: pointer to struct zfcp_send_els with data for the command
1190  */
1191 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1192                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1193 {
1194         struct zfcp_fsf_req *req;
1195         struct zfcp_qdio *qdio = adapter->qdio;
1196         int ret = -EIO;
1197
1198         spin_lock_bh(&qdio->req_q_lock);
1199         if (zfcp_fsf_req_sbal_get(qdio))
1200                 goto out;
1201
1202         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1203
1204         if (IS_ERR(req)) {
1205                 ret = PTR_ERR(req);
1206                 goto out;
1207         }
1208
1209         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1210         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2, timeout);
1211
1212         if (ret)
1213                 goto failed_send;
1214
1215         hton24(req->qtcb->bottom.support.d_id, d_id);
1216         req->handler = zfcp_fsf_send_els_handler;
1217         req->data = els;
1218
1219         zfcp_dbf_san_els_request(req);
1220
1221         ret = zfcp_fsf_req_send(req);
1222         if (ret)
1223                 goto failed_send;
1224
1225         goto out;
1226
1227 failed_send:
1228         zfcp_fsf_req_free(req);
1229 out:
1230         spin_unlock_bh(&qdio->req_q_lock);
1231         return ret;
1232 }
1233
1234 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1235 {
1236         struct qdio_buffer_element *sbale;
1237         struct zfcp_fsf_req *req;
1238         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1239         int retval = -EIO;
1240
1241         spin_lock_bh(&qdio->req_q_lock);
1242         if (zfcp_fsf_req_sbal_get(qdio))
1243                 goto out;
1244
1245         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1246                                   qdio->adapter->pool.erp_req);
1247
1248         if (IS_ERR(req)) {
1249                 retval = PTR_ERR(req);
1250                 goto out;
1251         }
1252
1253         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1254         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1255         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1256         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1257
1258         req->qtcb->bottom.config.feature_selection =
1259                         FSF_FEATURE_CFDC |
1260                         FSF_FEATURE_LUN_SHARING |
1261                         FSF_FEATURE_NOTIFICATION_LOST |
1262                         FSF_FEATURE_UPDATE_ALERT;
1263         req->erp_action = erp_action;
1264         req->handler = zfcp_fsf_exchange_config_data_handler;
1265         erp_action->fsf_req = req;
1266
1267         zfcp_fsf_start_erp_timer(req);
1268         retval = zfcp_fsf_req_send(req);
1269         if (retval) {
1270                 zfcp_fsf_req_free(req);
1271                 erp_action->fsf_req = NULL;
1272         }
1273 out:
1274         spin_unlock_bh(&qdio->req_q_lock);
1275         return retval;
1276 }
1277
1278 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1279                                        struct fsf_qtcb_bottom_config *data)
1280 {
1281         struct qdio_buffer_element *sbale;
1282         struct zfcp_fsf_req *req = NULL;
1283         int retval = -EIO;
1284
1285         spin_lock_bh(&qdio->req_q_lock);
1286         if (zfcp_fsf_req_sbal_get(qdio))
1287                 goto out_unlock;
1288
1289         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1290
1291         if (IS_ERR(req)) {
1292                 retval = PTR_ERR(req);
1293                 goto out_unlock;
1294         }
1295
1296         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1297         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1298         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1299         req->handler = zfcp_fsf_exchange_config_data_handler;
1300
1301         req->qtcb->bottom.config.feature_selection =
1302                         FSF_FEATURE_CFDC |
1303                         FSF_FEATURE_LUN_SHARING |
1304                         FSF_FEATURE_NOTIFICATION_LOST |
1305                         FSF_FEATURE_UPDATE_ALERT;
1306
1307         if (data)
1308                 req->data = data;
1309
1310         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1311         retval = zfcp_fsf_req_send(req);
1312         spin_unlock_bh(&qdio->req_q_lock);
1313         if (!retval)
1314                 wait_for_completion(&req->completion);
1315
1316         zfcp_fsf_req_free(req);
1317         return retval;
1318
1319 out_unlock:
1320         spin_unlock_bh(&qdio->req_q_lock);
1321         return retval;
1322 }
1323
1324 /**
1325  * zfcp_fsf_exchange_port_data - request information about local port
1326  * @erp_action: ERP action for the adapter for which port data is requested
1327  * Returns: 0 on success, error otherwise
1328  */
1329 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1330 {
1331         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1332         struct qdio_buffer_element *sbale;
1333         struct zfcp_fsf_req *req;
1334         int retval = -EIO;
1335
1336         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1337                 return -EOPNOTSUPP;
1338
1339         spin_lock_bh(&qdio->req_q_lock);
1340         if (zfcp_fsf_req_sbal_get(qdio))
1341                 goto out;
1342
1343         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1344                                   qdio->adapter->pool.erp_req);
1345
1346         if (IS_ERR(req)) {
1347                 retval = PTR_ERR(req);
1348                 goto out;
1349         }
1350
1351         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1352         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1353         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1354         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1355
1356         req->handler = zfcp_fsf_exchange_port_data_handler;
1357         req->erp_action = erp_action;
1358         erp_action->fsf_req = req;
1359
1360         zfcp_fsf_start_erp_timer(req);
1361         retval = zfcp_fsf_req_send(req);
1362         if (retval) {
1363                 zfcp_fsf_req_free(req);
1364                 erp_action->fsf_req = NULL;
1365         }
1366 out:
1367         spin_unlock_bh(&qdio->req_q_lock);
1368         return retval;
1369 }
1370
1371 /**
1372  * zfcp_fsf_exchange_port_data_sync - request information about local port
1373  * @qdio: pointer to struct zfcp_qdio
1374  * @data: pointer to struct fsf_qtcb_bottom_port
1375  * Returns: 0 on success, error otherwise
1376  */
1377 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1378                                      struct fsf_qtcb_bottom_port *data)
1379 {
1380         struct qdio_buffer_element *sbale;
1381         struct zfcp_fsf_req *req = NULL;
1382         int retval = -EIO;
1383
1384         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1385                 return -EOPNOTSUPP;
1386
1387         spin_lock_bh(&qdio->req_q_lock);
1388         if (zfcp_fsf_req_sbal_get(qdio))
1389                 goto out_unlock;
1390
1391         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1392
1393         if (IS_ERR(req)) {
1394                 retval = PTR_ERR(req);
1395                 goto out_unlock;
1396         }
1397
1398         if (data)
1399                 req->data = data;
1400
1401         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1402         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1403         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1404
1405         req->handler = zfcp_fsf_exchange_port_data_handler;
1406         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1407         retval = zfcp_fsf_req_send(req);
1408         spin_unlock_bh(&qdio->req_q_lock);
1409
1410         if (!retval)
1411                 wait_for_completion(&req->completion);
1412
1413         zfcp_fsf_req_free(req);
1414
1415         return retval;
1416
1417 out_unlock:
1418         spin_unlock_bh(&qdio->req_q_lock);
1419         return retval;
1420 }
1421
1422 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1423 {
1424         struct zfcp_port *port = req->data;
1425         struct fsf_qtcb_header *header = &req->qtcb->header;
1426         struct fc_els_flogi *plogi;
1427
1428         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1429                 goto out;
1430
1431         switch (header->fsf_status) {
1432         case FSF_PORT_ALREADY_OPEN:
1433                 break;
1434         case FSF_ACCESS_DENIED:
1435                 zfcp_fsf_access_denied_port(req, port);
1436                 break;
1437         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1438                 dev_warn(&req->adapter->ccw_device->dev,
1439                          "Not enough FCP adapter resources to open "
1440                          "remote port 0x%016Lx\n",
1441                          (unsigned long long)port->wwpn);
1442                 zfcp_erp_port_failed(port, "fsoph_1", req);
1443                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1444                 break;
1445         case FSF_ADAPTER_STATUS_AVAILABLE:
1446                 switch (header->fsf_status_qual.word[0]) {
1447                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1448                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1449                 case FSF_SQ_NO_RETRY_POSSIBLE:
1450                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1451                         break;
1452                 }
1453                 break;
1454         case FSF_GOOD:
1455                 port->handle = header->port_handle;
1456                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1457                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1458                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1459                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1460                                   &port->status);
1461                 /* check whether D_ID has changed during open */
1462                 /*
1463                  * FIXME: This check is not airtight, as the FCP channel does
1464                  * not monitor closures of target port connections caused on
1465                  * the remote side. Thus, they might miss out on invalidating
1466                  * locally cached WWPNs (and other N_Port parameters) of gone
1467                  * target ports. So, our heroic attempt to make things safe
1468                  * could be undermined by 'open port' response data tagged with
1469                  * obsolete WWPNs. Another reason to monitor potential
1470                  * connection closures ourself at least (by interpreting
1471                  * incoming ELS' and unsolicited status). It just crosses my
1472                  * mind that one should be able to cross-check by means of
1473                  * another GID_PN straight after a port has been opened.
1474                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1475                  */
1476                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1477                 if (req->qtcb->bottom.support.els1_length >=
1478                     FSF_PLOGI_MIN_LEN)
1479                                 zfcp_fc_plogi_evaluate(port, plogi);
1480                 break;
1481         case FSF_UNKNOWN_OP_SUBTYPE:
1482                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1483                 break;
1484         }
1485
1486 out:
1487         put_device(&port->sysfs_device);
1488 }
1489
1490 /**
1491  * zfcp_fsf_open_port - create and send open port request
1492  * @erp_action: pointer to struct zfcp_erp_action
1493  * Returns: 0 on success, error otherwise
1494  */
1495 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1496 {
1497         struct qdio_buffer_element *sbale;
1498         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1499         struct zfcp_port *port = erp_action->port;
1500         struct zfcp_fsf_req *req;
1501         int retval = -EIO;
1502
1503         spin_lock_bh(&qdio->req_q_lock);
1504         if (zfcp_fsf_req_sbal_get(qdio))
1505                 goto out;
1506
1507         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1508                                   qdio->adapter->pool.erp_req);
1509
1510         if (IS_ERR(req)) {
1511                 retval = PTR_ERR(req);
1512                 goto out;
1513         }
1514
1515         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1516         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1517         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1518         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1519
1520         req->handler = zfcp_fsf_open_port_handler;
1521         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1522         req->data = port;
1523         req->erp_action = erp_action;
1524         erp_action->fsf_req = req;
1525         get_device(&port->sysfs_device);
1526
1527         zfcp_fsf_start_erp_timer(req);
1528         retval = zfcp_fsf_req_send(req);
1529         if (retval) {
1530                 zfcp_fsf_req_free(req);
1531                 erp_action->fsf_req = NULL;
1532                 put_device(&port->sysfs_device);
1533         }
1534 out:
1535         spin_unlock_bh(&qdio->req_q_lock);
1536         return retval;
1537 }
1538
1539 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1540 {
1541         struct zfcp_port *port = req->data;
1542
1543         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1544                 return;
1545
1546         switch (req->qtcb->header.fsf_status) {
1547         case FSF_PORT_HANDLE_NOT_VALID:
1548                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1549                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1550                 break;
1551         case FSF_ADAPTER_STATUS_AVAILABLE:
1552                 break;
1553         case FSF_GOOD:
1554                 zfcp_erp_modify_port_status(port, "fscph_2", req,
1555                                             ZFCP_STATUS_COMMON_OPEN,
1556                                             ZFCP_CLEAR);
1557                 break;
1558         }
1559 }
1560
1561 /**
1562  * zfcp_fsf_close_port - create and send close port request
1563  * @erp_action: pointer to struct zfcp_erp_action
1564  * Returns: 0 on success, error otherwise
1565  */
1566 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1567 {
1568         struct qdio_buffer_element *sbale;
1569         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1570         struct zfcp_fsf_req *req;
1571         int retval = -EIO;
1572
1573         spin_lock_bh(&qdio->req_q_lock);
1574         if (zfcp_fsf_req_sbal_get(qdio))
1575                 goto out;
1576
1577         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1578                                   qdio->adapter->pool.erp_req);
1579
1580         if (IS_ERR(req)) {
1581                 retval = PTR_ERR(req);
1582                 goto out;
1583         }
1584
1585         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1586         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1587         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1588         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1589
1590         req->handler = zfcp_fsf_close_port_handler;
1591         req->data = erp_action->port;
1592         req->erp_action = erp_action;
1593         req->qtcb->header.port_handle = erp_action->port->handle;
1594         erp_action->fsf_req = req;
1595
1596         zfcp_fsf_start_erp_timer(req);
1597         retval = zfcp_fsf_req_send(req);
1598         if (retval) {
1599                 zfcp_fsf_req_free(req);
1600                 erp_action->fsf_req = NULL;
1601         }
1602 out:
1603         spin_unlock_bh(&qdio->req_q_lock);
1604         return retval;
1605 }
1606
1607 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1608 {
1609         struct zfcp_fc_wka_port *wka_port = req->data;
1610         struct fsf_qtcb_header *header = &req->qtcb->header;
1611
1612         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1613                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1614                 goto out;
1615         }
1616
1617         switch (header->fsf_status) {
1618         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1619                 dev_warn(&req->adapter->ccw_device->dev,
1620                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1621                 /* fall through */
1622         case FSF_ADAPTER_STATUS_AVAILABLE:
1623                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1624                 /* fall through */
1625         case FSF_ACCESS_DENIED:
1626                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1627                 break;
1628         case FSF_GOOD:
1629                 wka_port->handle = header->port_handle;
1630                 /* fall through */
1631         case FSF_PORT_ALREADY_OPEN:
1632                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1633         }
1634 out:
1635         wake_up(&wka_port->completion_wq);
1636 }
1637
1638 /**
1639  * zfcp_fsf_open_wka_port - create and send open wka-port request
1640  * @wka_port: pointer to struct zfcp_fc_wka_port
1641  * Returns: 0 on success, error otherwise
1642  */
1643 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1644 {
1645         struct qdio_buffer_element *sbale;
1646         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1647         struct zfcp_fsf_req *req;
1648         int retval = -EIO;
1649
1650         spin_lock_bh(&qdio->req_q_lock);
1651         if (zfcp_fsf_req_sbal_get(qdio))
1652                 goto out;
1653
1654         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1655                                   qdio->adapter->pool.erp_req);
1656
1657         if (unlikely(IS_ERR(req))) {
1658                 retval = PTR_ERR(req);
1659                 goto out;
1660         }
1661
1662         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1663         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1664         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1665         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1666
1667         req->handler = zfcp_fsf_open_wka_port_handler;
1668         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1669         req->data = wka_port;
1670
1671         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1672         retval = zfcp_fsf_req_send(req);
1673         if (retval)
1674                 zfcp_fsf_req_free(req);
1675 out:
1676         spin_unlock_bh(&qdio->req_q_lock);
1677         return retval;
1678 }
1679
1680 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1681 {
1682         struct zfcp_fc_wka_port *wka_port = req->data;
1683
1684         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1685                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1686                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1687         }
1688
1689         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1690         wake_up(&wka_port->completion_wq);
1691 }
1692
1693 /**
1694  * zfcp_fsf_close_wka_port - create and send close wka port request
1695  * @wka_port: WKA port to open
1696  * Returns: 0 on success, error otherwise
1697  */
1698 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1699 {
1700         struct qdio_buffer_element *sbale;
1701         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1702         struct zfcp_fsf_req *req;
1703         int retval = -EIO;
1704
1705         spin_lock_bh(&qdio->req_q_lock);
1706         if (zfcp_fsf_req_sbal_get(qdio))
1707                 goto out;
1708
1709         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1710                                   qdio->adapter->pool.erp_req);
1711
1712         if (unlikely(IS_ERR(req))) {
1713                 retval = PTR_ERR(req);
1714                 goto out;
1715         }
1716
1717         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1718         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1719         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1720         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1721
1722         req->handler = zfcp_fsf_close_wka_port_handler;
1723         req->data = wka_port;
1724         req->qtcb->header.port_handle = wka_port->handle;
1725
1726         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1727         retval = zfcp_fsf_req_send(req);
1728         if (retval)
1729                 zfcp_fsf_req_free(req);
1730 out:
1731         spin_unlock_bh(&qdio->req_q_lock);
1732         return retval;
1733 }
1734
1735 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1736 {
1737         struct zfcp_port *port = req->data;
1738         struct fsf_qtcb_header *header = &req->qtcb->header;
1739         struct zfcp_unit *unit;
1740
1741         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1742                 return;
1743
1744         switch (header->fsf_status) {
1745         case FSF_PORT_HANDLE_NOT_VALID:
1746                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1747                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1748                 break;
1749         case FSF_ACCESS_DENIED:
1750                 zfcp_fsf_access_denied_port(req, port);
1751                 break;
1752         case FSF_PORT_BOXED:
1753                 /* can't use generic zfcp_erp_modify_port_status because
1754                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1755                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1756                 read_lock(&port->unit_list_lock);
1757                 list_for_each_entry(unit, &port->unit_list, list)
1758                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1759                                           &unit->status);
1760                 read_unlock(&port->unit_list_lock);
1761                 zfcp_erp_port_boxed(port, "fscpph2", req);
1762                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1763                 break;
1764         case FSF_ADAPTER_STATUS_AVAILABLE:
1765                 switch (header->fsf_status_qual.word[0]) {
1766                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1767                         /* fall through */
1768                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1769                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1770                         break;
1771                 }
1772                 break;
1773         case FSF_GOOD:
1774                 /* can't use generic zfcp_erp_modify_port_status because
1775                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1776                  */
1777                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1778                 read_lock(&port->unit_list_lock);
1779                 list_for_each_entry(unit, &port->unit_list, list)
1780                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1781                                           &unit->status);
1782                 read_unlock(&port->unit_list_lock);
1783                 break;
1784         }
1785 }
1786
1787 /**
1788  * zfcp_fsf_close_physical_port - close physical port
1789  * @erp_action: pointer to struct zfcp_erp_action
1790  * Returns: 0 on success
1791  */
1792 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1793 {
1794         struct qdio_buffer_element *sbale;
1795         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1796         struct zfcp_fsf_req *req;
1797         int retval = -EIO;
1798
1799         spin_lock_bh(&qdio->req_q_lock);
1800         if (zfcp_fsf_req_sbal_get(qdio))
1801                 goto out;
1802
1803         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1804                                   qdio->adapter->pool.erp_req);
1805
1806         if (IS_ERR(req)) {
1807                 retval = PTR_ERR(req);
1808                 goto out;
1809         }
1810
1811         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1812         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1813         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1814         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1815
1816         req->data = erp_action->port;
1817         req->qtcb->header.port_handle = erp_action->port->handle;
1818         req->erp_action = erp_action;
1819         req->handler = zfcp_fsf_close_physical_port_handler;
1820         erp_action->fsf_req = req;
1821
1822         zfcp_fsf_start_erp_timer(req);
1823         retval = zfcp_fsf_req_send(req);
1824         if (retval) {
1825                 zfcp_fsf_req_free(req);
1826                 erp_action->fsf_req = NULL;
1827         }
1828 out:
1829         spin_unlock_bh(&qdio->req_q_lock);
1830         return retval;
1831 }
1832
1833 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1834 {
1835         struct zfcp_adapter *adapter = req->adapter;
1836         struct zfcp_unit *unit = req->data;
1837         struct fsf_qtcb_header *header = &req->qtcb->header;
1838         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1839         struct fsf_queue_designator *queue_designator =
1840                                 &header->fsf_status_qual.fsf_queue_designator;
1841         int exclusive, readwrite;
1842
1843         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1844                 return;
1845
1846         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1847                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1848                           ZFCP_STATUS_UNIT_SHARED |
1849                           ZFCP_STATUS_UNIT_READONLY,
1850                           &unit->status);
1851
1852         switch (header->fsf_status) {
1853
1854         case FSF_PORT_HANDLE_NOT_VALID:
1855                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1856                 /* fall through */
1857         case FSF_LUN_ALREADY_OPEN:
1858                 break;
1859         case FSF_ACCESS_DENIED:
1860                 zfcp_fsf_access_denied_unit(req, unit);
1861                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1862                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1863                 break;
1864         case FSF_PORT_BOXED:
1865                 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1866                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1867                 break;
1868         case FSF_LUN_SHARING_VIOLATION:
1869                 if (header->fsf_status_qual.word[0])
1870                         dev_warn(&adapter->ccw_device->dev,
1871                                  "LUN 0x%Lx on port 0x%Lx is already in "
1872                                  "use by CSS%d, MIF Image ID %x\n",
1873                                  (unsigned long long)unit->fcp_lun,
1874                                  (unsigned long long)unit->port->wwpn,
1875                                  queue_designator->cssid,
1876                                  queue_designator->hla);
1877                 else
1878                         zfcp_act_eval_err(adapter,
1879                                           header->fsf_status_qual.word[2]);
1880                 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1881                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1882                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1883                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1884                 break;
1885         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1886                 dev_warn(&adapter->ccw_device->dev,
1887                          "No handle is available for LUN "
1888                          "0x%016Lx on port 0x%016Lx\n",
1889                          (unsigned long long)unit->fcp_lun,
1890                          (unsigned long long)unit->port->wwpn);
1891                 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1892                 /* fall through */
1893         case FSF_INVALID_COMMAND_OPTION:
1894                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1895                 break;
1896         case FSF_ADAPTER_STATUS_AVAILABLE:
1897                 switch (header->fsf_status_qual.word[0]) {
1898                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1899                         zfcp_fc_test_link(unit->port);
1900                         /* fall through */
1901                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1902                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1903                         break;
1904                 }
1905                 break;
1906
1907         case FSF_GOOD:
1908                 unit->handle = header->lun_handle;
1909                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1910
1911                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1912                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1913                     !zfcp_ccw_priv_sch(adapter)) {
1914                         exclusive = (bottom->lun_access_info &
1915                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1916                         readwrite = (bottom->lun_access_info &
1917                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1918
1919                         if (!exclusive)
1920                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1921                                                 &unit->status);
1922
1923                         if (!readwrite) {
1924                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1925                                                 &unit->status);
1926                                 dev_info(&adapter->ccw_device->dev,
1927                                          "SCSI device at LUN 0x%016Lx on port "
1928                                          "0x%016Lx opened read-only\n",
1929                                          (unsigned long long)unit->fcp_lun,
1930                                          (unsigned long long)unit->port->wwpn);
1931                         }
1932
1933                         if (exclusive && !readwrite) {
1934                                 dev_err(&adapter->ccw_device->dev,
1935                                         "Exclusive read-only access not "
1936                                         "supported (unit 0x%016Lx, "
1937                                         "port 0x%016Lx)\n",
1938                                         (unsigned long long)unit->fcp_lun,
1939                                         (unsigned long long)unit->port->wwpn);
1940                                 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1941                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1942                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1943                         } else if (!exclusive && readwrite) {
1944                                 dev_err(&adapter->ccw_device->dev,
1945                                         "Shared read-write access not "
1946                                         "supported (unit 0x%016Lx, port "
1947                                         "0x%016Lx)\n",
1948                                         (unsigned long long)unit->fcp_lun,
1949                                         (unsigned long long)unit->port->wwpn);
1950                                 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1951                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1952                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1953                         }
1954                 }
1955                 break;
1956         }
1957 }
1958
1959 /**
1960  * zfcp_fsf_open_unit - open unit
1961  * @erp_action: pointer to struct zfcp_erp_action
1962  * Returns: 0 on success, error otherwise
1963  */
1964 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1965 {
1966         struct qdio_buffer_element *sbale;
1967         struct zfcp_adapter *adapter = erp_action->adapter;
1968         struct zfcp_qdio *qdio = adapter->qdio;
1969         struct zfcp_fsf_req *req;
1970         int retval = -EIO;
1971
1972         spin_lock_bh(&qdio->req_q_lock);
1973         if (zfcp_fsf_req_sbal_get(qdio))
1974                 goto out;
1975
1976         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1977                                   adapter->pool.erp_req);
1978
1979         if (IS_ERR(req)) {
1980                 retval = PTR_ERR(req);
1981                 goto out;
1982         }
1983
1984         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1985         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1986         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1987         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1988
1989         req->qtcb->header.port_handle = erp_action->port->handle;
1990         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1991         req->handler = zfcp_fsf_open_unit_handler;
1992         req->data = erp_action->unit;
1993         req->erp_action = erp_action;
1994         erp_action->fsf_req = req;
1995
1996         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1997                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1998
1999         zfcp_fsf_start_erp_timer(req);
2000         retval = zfcp_fsf_req_send(req);
2001         if (retval) {
2002                 zfcp_fsf_req_free(req);
2003                 erp_action->fsf_req = NULL;
2004         }
2005 out:
2006         spin_unlock_bh(&qdio->req_q_lock);
2007         return retval;
2008 }
2009
2010 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2011 {
2012         struct zfcp_unit *unit = req->data;
2013
2014         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2015                 return;
2016
2017         switch (req->qtcb->header.fsf_status) {
2018         case FSF_PORT_HANDLE_NOT_VALID:
2019                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2020                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2021                 break;
2022         case FSF_LUN_HANDLE_NOT_VALID:
2023                 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2024                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2025                 break;
2026         case FSF_PORT_BOXED:
2027                 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2028                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2029                 break;
2030         case FSF_ADAPTER_STATUS_AVAILABLE:
2031                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2032                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2033                         zfcp_fc_test_link(unit->port);
2034                         /* fall through */
2035                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2036                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2037                         break;
2038                 }
2039                 break;
2040         case FSF_GOOD:
2041                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2042                 break;
2043         }
2044 }
2045
2046 /**
2047  * zfcp_fsf_close_unit - close zfcp unit
2048  * @erp_action: pointer to struct zfcp_unit
2049  * Returns: 0 on success, error otherwise
2050  */
2051 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2052 {
2053         struct qdio_buffer_element *sbale;
2054         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2055         struct zfcp_fsf_req *req;
2056         int retval = -EIO;
2057
2058         spin_lock_bh(&qdio->req_q_lock);
2059         if (zfcp_fsf_req_sbal_get(qdio))
2060                 goto out;
2061
2062         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2063                                   qdio->adapter->pool.erp_req);
2064
2065         if (IS_ERR(req)) {
2066                 retval = PTR_ERR(req);
2067                 goto out;
2068         }
2069
2070         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2071         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2072         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2073         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2074
2075         req->qtcb->header.port_handle = erp_action->port->handle;
2076         req->qtcb->header.lun_handle = erp_action->unit->handle;
2077         req->handler = zfcp_fsf_close_unit_handler;
2078         req->data = erp_action->unit;
2079         req->erp_action = erp_action;
2080         erp_action->fsf_req = req;
2081
2082         zfcp_fsf_start_erp_timer(req);
2083         retval = zfcp_fsf_req_send(req);
2084         if (retval) {
2085                 zfcp_fsf_req_free(req);
2086                 erp_action->fsf_req = NULL;
2087         }
2088 out:
2089         spin_unlock_bh(&qdio->req_q_lock);
2090         return retval;
2091 }
2092
2093 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2094 {
2095         lat_rec->sum += lat;
2096         lat_rec->min = min(lat_rec->min, lat);
2097         lat_rec->max = max(lat_rec->max, lat);
2098 }
2099
2100 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2101 {
2102         struct fsf_qual_latency_info *lat_in;
2103         struct latency_cont *lat = NULL;
2104         struct zfcp_unit *unit = req->unit;
2105         struct zfcp_blk_drv_data blktrc;
2106         int ticks = req->adapter->timer_ticks;
2107
2108         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2109
2110         blktrc.flags = 0;
2111         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2112         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2113                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2114         blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2115         blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2116
2117         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2118                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2119                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2120                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2121
2122                 switch (req->qtcb->bottom.io.data_direction) {
2123                 case FSF_DATADIR_READ:
2124                         lat = &unit->latencies.read;
2125                         break;
2126                 case FSF_DATADIR_WRITE:
2127                         lat = &unit->latencies.write;
2128                         break;
2129                 case FSF_DATADIR_CMND:
2130                         lat = &unit->latencies.cmd;
2131                         break;
2132                 }
2133
2134                 if (lat) {
2135                         spin_lock(&unit->latencies.lock);
2136                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2137                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2138                         lat->counter++;
2139                         spin_unlock(&unit->latencies.lock);
2140                 }
2141         }
2142
2143         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2144                             sizeof(blktrc));
2145 }
2146
2147 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2148 {
2149         struct scsi_cmnd *scpnt;
2150         struct fcp_resp_with_ext *fcp_rsp;
2151         unsigned long flags;
2152
2153         read_lock_irqsave(&req->adapter->abort_lock, flags);
2154
2155         scpnt = req->data;
2156         if (unlikely(!scpnt)) {
2157                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2158                 return;
2159         }
2160
2161         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2162                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2163                 goto skip_fsfstatus;
2164         }
2165
2166         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2167         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2168
2169         zfcp_fsf_req_trace(req, scpnt);
2170
2171 skip_fsfstatus:
2172         if (scpnt->result != 0)
2173                 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2174         else if (scpnt->retries > 0)
2175                 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2176         else
2177                 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2178
2179         scpnt->host_scribble = NULL;
2180         (scpnt->scsi_done) (scpnt);
2181         /*
2182          * We must hold this lock until scsi_done has been called.
2183          * Otherwise we may call scsi_done after abort regarding this
2184          * command has completed.
2185          * Note: scsi_done must not block!
2186          */
2187         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2188 }
2189
2190 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2191 {
2192         struct fcp_resp_with_ext *fcp_rsp;
2193         struct fcp_resp_rsp_info *rsp_info;
2194
2195         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2196         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2197
2198         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2199              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2200                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2201 }
2202
2203
2204 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2205 {
2206         struct zfcp_unit *unit;
2207         struct fsf_qtcb_header *header = &req->qtcb->header;
2208
2209         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2210                 unit = req->data;
2211         else
2212                 unit = req->unit;
2213
2214         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2215                 goto skip_fsfstatus;
2216
2217         switch (header->fsf_status) {
2218         case FSF_HANDLE_MISMATCH:
2219         case FSF_PORT_HANDLE_NOT_VALID:
2220                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2221                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2222                 break;
2223         case FSF_FCPLUN_NOT_VALID:
2224         case FSF_LUN_HANDLE_NOT_VALID:
2225                 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2226                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2227                 break;
2228         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2229                 zfcp_fsf_class_not_supp(req);
2230                 break;
2231         case FSF_ACCESS_DENIED:
2232                 zfcp_fsf_access_denied_unit(req, unit);
2233                 break;
2234         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2235                 dev_err(&req->adapter->ccw_device->dev,
2236                         "Incorrect direction %d, unit 0x%016Lx on port "
2237                         "0x%016Lx closed\n",
2238                         req->qtcb->bottom.io.data_direction,
2239                         (unsigned long long)unit->fcp_lun,
2240                         (unsigned long long)unit->port->wwpn);
2241                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2242                                           req);
2243                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2244                 break;
2245         case FSF_CMND_LENGTH_NOT_VALID:
2246                 dev_err(&req->adapter->ccw_device->dev,
2247                         "Incorrect CDB length %d, unit 0x%016Lx on "
2248                         "port 0x%016Lx closed\n",
2249                         req->qtcb->bottom.io.fcp_cmnd_length,
2250                         (unsigned long long)unit->fcp_lun,
2251                         (unsigned long long)unit->port->wwpn);
2252                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2253                                           req);
2254                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2255                 break;
2256         case FSF_PORT_BOXED:
2257                 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2258                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2259                 break;
2260         case FSF_LUN_BOXED:
2261                 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2262                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2263                 break;
2264         case FSF_ADAPTER_STATUS_AVAILABLE:
2265                 if (header->fsf_status_qual.word[0] ==
2266                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2267                         zfcp_fc_test_link(unit->port);
2268                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2269                 break;
2270         }
2271 skip_fsfstatus:
2272         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2273                 zfcp_fsf_send_fcp_ctm_handler(req);
2274         else {
2275                 zfcp_fsf_send_fcp_command_task_handler(req);
2276                 req->unit = NULL;
2277                 put_device(&unit->sysfs_device);
2278         }
2279 }
2280
2281 /**
2282  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2283  * @unit: unit where command is sent to
2284  * @scsi_cmnd: scsi command to be sent
2285  */
2286 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2287                                    struct scsi_cmnd *scsi_cmnd)
2288 {
2289         struct zfcp_fsf_req *req;
2290         struct fcp_cmnd *fcp_cmnd;
2291         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2292         int real_bytes, retval = -EIO;
2293         struct zfcp_adapter *adapter = unit->port->adapter;
2294         struct zfcp_qdio *qdio = adapter->qdio;
2295
2296         if (unlikely(!(atomic_read(&unit->status) &
2297                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2298                 return -EBUSY;
2299
2300         spin_lock(&qdio->req_q_lock);
2301         if (atomic_read(&qdio->req_q.count) <= 0) {
2302                 atomic_inc(&qdio->req_q_full);
2303                 goto out;
2304         }
2305
2306         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2307                                   adapter->pool.scsi_req);
2308
2309         if (IS_ERR(req)) {
2310                 retval = PTR_ERR(req);
2311                 goto out;
2312         }
2313
2314         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2315         get_device(&unit->sysfs_device);
2316         req->unit = unit;
2317         req->data = scsi_cmnd;
2318         req->handler = zfcp_fsf_send_fcp_command_handler;
2319         req->qtcb->header.lun_handle = unit->handle;
2320         req->qtcb->header.port_handle = unit->port->handle;
2321         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2322         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2323
2324         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2325
2326         /*
2327          * set depending on data direction:
2328          *      data direction bits in SBALE (SB Type)
2329          *      data direction bits in QTCB
2330          */
2331         switch (scsi_cmnd->sc_data_direction) {
2332         case DMA_NONE:
2333                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2334                 break;
2335         case DMA_FROM_DEVICE:
2336                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2337                 break;
2338         case DMA_TO_DEVICE:
2339                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2340                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2341                 break;
2342         case DMA_BIDIRECTIONAL:
2343                 goto failed_scsi_cmnd;
2344         }
2345
2346         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2347         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2348
2349         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2350                                              scsi_sglist(scsi_cmnd),
2351                                              FSF_MAX_SBALS_PER_REQ);
2352         if (unlikely(real_bytes < 0)) {
2353                 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2354                         dev_err(&adapter->ccw_device->dev,
2355                                 "Oversize data package, unit 0x%016Lx "
2356                                 "on port 0x%016Lx closed\n",
2357                                 (unsigned long long)unit->fcp_lun,
2358                                 (unsigned long long)unit->port->wwpn);
2359                         zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2360                         retval = -EINVAL;
2361                 }
2362                 goto failed_scsi_cmnd;
2363         }
2364
2365         retval = zfcp_fsf_req_send(req);
2366         if (unlikely(retval))
2367                 goto failed_scsi_cmnd;
2368
2369         goto out;
2370
2371 failed_scsi_cmnd:
2372         put_device(&unit->sysfs_device);
2373         zfcp_fsf_req_free(req);
2374         scsi_cmnd->host_scribble = NULL;
2375 out:
2376         spin_unlock(&qdio->req_q_lock);
2377         return retval;
2378 }
2379
2380 /**
2381  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2382  * @unit: pointer to struct zfcp_unit
2383  * @tm_flags: unsigned byte for task management flags
2384  * Returns: on success pointer to struct fsf_req, NULL otherwise
2385  */
2386 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2387 {
2388         struct qdio_buffer_element *sbale;
2389         struct zfcp_fsf_req *req = NULL;
2390         struct fcp_cmnd *fcp_cmnd;
2391         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2392
2393         if (unlikely(!(atomic_read(&unit->status) &
2394                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2395                 return NULL;
2396
2397         spin_lock_bh(&qdio->req_q_lock);
2398         if (zfcp_fsf_req_sbal_get(qdio))
2399                 goto out;
2400
2401         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2402                                   qdio->adapter->pool.scsi_req);
2403
2404         if (IS_ERR(req)) {
2405                 req = NULL;
2406                 goto out;
2407         }
2408
2409         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2410         req->data = unit;
2411         req->handler = zfcp_fsf_send_fcp_command_handler;
2412         req->qtcb->header.lun_handle = unit->handle;
2413         req->qtcb->header.port_handle = unit->port->handle;
2414         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2415         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2416         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2417
2418         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2419         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2420         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2421
2422         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2423         zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2424
2425         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2426         if (!zfcp_fsf_req_send(req))
2427                 goto out;
2428
2429         zfcp_fsf_req_free(req);
2430         req = NULL;
2431 out:
2432         spin_unlock_bh(&qdio->req_q_lock);
2433         return req;
2434 }
2435
2436 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2437 {
2438 }
2439
2440 /**
2441  * zfcp_fsf_control_file - control file upload/download
2442  * @adapter: pointer to struct zfcp_adapter
2443  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2444  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2445  */
2446 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2447                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2448 {
2449         struct qdio_buffer_element *sbale;
2450         struct zfcp_qdio *qdio = adapter->qdio;
2451         struct zfcp_fsf_req *req = NULL;
2452         struct fsf_qtcb_bottom_support *bottom;
2453         int direction, retval = -EIO, bytes;
2454
2455         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2456                 return ERR_PTR(-EOPNOTSUPP);
2457
2458         switch (fsf_cfdc->command) {
2459         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2460                 direction = SBAL_FLAGS0_TYPE_WRITE;
2461                 break;
2462         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2463                 direction = SBAL_FLAGS0_TYPE_READ;
2464                 break;
2465         default:
2466                 return ERR_PTR(-EINVAL);
2467         }
2468
2469         spin_lock_bh(&qdio->req_q_lock);
2470         if (zfcp_fsf_req_sbal_get(qdio))
2471                 goto out;
2472
2473         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2474         if (IS_ERR(req)) {
2475                 retval = -EPERM;
2476                 goto out;
2477         }
2478
2479         req->handler = zfcp_fsf_control_file_handler;
2480
2481         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2482         sbale[0].flags |= direction;
2483
2484         bottom = &req->qtcb->bottom.support;
2485         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2486         bottom->option = fsf_cfdc->option;
2487
2488         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2489                                         direction, fsf_cfdc->sg,
2490                                         FSF_MAX_SBALS_PER_REQ);
2491         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2492                 zfcp_fsf_req_free(req);
2493                 goto out;
2494         }
2495
2496         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2497         retval = zfcp_fsf_req_send(req);
2498 out:
2499         spin_unlock_bh(&qdio->req_q_lock);
2500
2501         if (!retval) {
2502                 wait_for_completion(&req->completion);
2503                 return req;
2504         }
2505         return ERR_PTR(retval);
2506 }
2507
2508 /**
2509  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2510  * @adapter: pointer to struct zfcp_adapter
2511  * @sbal_idx: response queue index of SBAL to be processed
2512  */
2513 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2514 {
2515         struct zfcp_adapter *adapter = qdio->adapter;
2516         struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2517         struct qdio_buffer_element *sbale;
2518         struct zfcp_fsf_req *fsf_req;
2519         unsigned long flags, req_id;
2520         int idx;
2521
2522         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2523
2524                 sbale = &sbal->element[idx];
2525                 req_id = (unsigned long) sbale->addr;
2526                 spin_lock_irqsave(&adapter->req_list_lock, flags);
2527                 fsf_req = zfcp_reqlist_find(adapter, req_id);
2528
2529                 if (!fsf_req)
2530                         /*
2531                          * Unknown request means that we have potentially memory
2532                          * corruption and must stop the machine immediately.
2533                          */
2534                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2535                               req_id, dev_name(&adapter->ccw_device->dev));
2536
2537                 list_del(&fsf_req->list);
2538                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2539
2540                 fsf_req->queue_req.sbal_response = sbal_idx;
2541                 fsf_req->queue_req.qdio_inb_usage =
2542                         atomic_read(&qdio->resp_q.count);
2543                 zfcp_fsf_req_complete(fsf_req);
2544
2545                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2546                         break;
2547         }
2548 }