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

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