drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2010
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <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                 /* go through reopen to flush pending requests */
 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
 495         adapter->hydra_version = bottom->adapter_type;
 496         adapter->timer_ticks = bottom->timer_interval;
 497
 498         if (fc_host_permanent_port_name(shost) == -1)
 499                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 500
 501         switch (bottom->fc_topology) {
 502         case FSF_TOPO_P2P:
 503                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 504                 adapter->peer_wwpn = plogi->fl_wwpn;
 505                 adapter->peer_wwnn = plogi->fl_wwnn;
 506                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 507                 break;
 508         case FSF_TOPO_FABRIC:
 509                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 510                 break;
 511         case FSF_TOPO_AL:
 512                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 513                 /* fall through */
 514         default:
 515                 dev_err(&adapter->ccw_device->dev,
 516                         "Unknown or unsupported arbitrated loop "
 517                         "fibre channel topology detected\n");
 518                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
 519                 return -EIO;
 520         }
 521
 522         return 0;
 523 }
 524
 525 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 526 {
 527         struct zfcp_adapter *adapter = req->adapter;
 528         struct fsf_qtcb *qtcb = req->qtcb;
 529         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 530         struct Scsi_Host *shost = adapter->scsi_host;
 531
 532         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 533                 return;
 534
 535         adapter->fsf_lic_version = bottom->lic_version;
 536         adapter->adapter_features = bottom->adapter_features;
 537         adapter->connection_features = bottom->connection_features;
 538         adapter->peer_wwpn = 0;
 539         adapter->peer_wwnn = 0;
 540         adapter->peer_d_id = 0;
 541
 542         switch (qtcb->header.fsf_status) {
 543         case FSF_GOOD:
 544                 if (zfcp_fsf_exchange_config_evaluate(req))
 545                         return;
 546
 547                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 548                         dev_err(&adapter->ccw_device->dev,
 549                                 "FCP adapter maximum QTCB size (%d bytes) "
 550                                 "is too small\n",
 551                                 bottom->max_qtcb_size);
 552                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
 553                         return;
 554                 }
 555                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 556                                 &adapter->status);
 557                 break;
 558         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 559                 fc_host_node_name(shost) = 0;
 560                 fc_host_port_name(shost) = 0;
 561                 fc_host_port_id(shost) = 0;
 562                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 563                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 564                 adapter->hydra_version = 0;
 565
 566                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 567                                 &adapter->status);
 568
 569                 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
 570                         &qtcb->header.fsf_status_qual.link_down_info);
 571                 break;
 572         default:
 573                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
 574                 return;
 575         }
 576
 577         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 578                 adapter->hardware_version = bottom->hardware_version;
 579                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 580                        min(FC_SERIAL_NUMBER_SIZE, 17));
 581                 EBCASC(fc_host_serial_number(shost),
 582                        min(FC_SERIAL_NUMBER_SIZE, 17));
 583         }
 584
 585         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 586                 dev_err(&adapter->ccw_device->dev,
 587                         "The FCP adapter only supports newer "
 588                         "control block versions\n");
 589                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
 590                 return;
 591         }
 592         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 593                 dev_err(&adapter->ccw_device->dev,
 594                         "The FCP adapter only supports older "
 595                         "control block versions\n");
 596                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
 597         }
 598 }
 599
 600 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 601 {
 602         struct zfcp_adapter *adapter = req->adapter;
 603         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 604         struct Scsi_Host *shost = adapter->scsi_host;
 605
 606         if (req->data)
 607                 memcpy(req->data, bottom, sizeof(*bottom));
 608
 609         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 610                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 611                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 612         } else
 613                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 614         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 615         fc_host_supported_speeds(shost) = bottom->supported_speed;
 616         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 617                FC_FC4_LIST_SIZE);
 618         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 619                FC_FC4_LIST_SIZE);
 620 }
 621
 622 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 623 {
 624         struct fsf_qtcb *qtcb = req->qtcb;
 625
 626         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 627                 return;
 628
 629         switch (qtcb->header.fsf_status) {
 630         case FSF_GOOD:
 631                 zfcp_fsf_exchange_port_evaluate(req);
 632                 break;
 633         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 634                 zfcp_fsf_exchange_port_evaluate(req);
 635                 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
 636                         &qtcb->header.fsf_status_qual.link_down_info);
 637                 break;
 638         }
 639 }
 640
 641 static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
 642 {
 643         struct zfcp_qdio_queue *req_q = &qdio->req_q;
 644
 645         spin_lock_bh(&qdio->req_q_lock);
 646         if (atomic_read(&req_q->count))
 647                 return 1;
 648         spin_unlock_bh(&qdio->req_q_lock);
 649         return 0;
 650 }
 651
 652 static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
 653 {
 654         struct zfcp_adapter *adapter = qdio->adapter;
 655         long ret;
 656
 657         spin_unlock_bh(&qdio->req_q_lock);
 658         ret = wait_event_interruptible_timeout(qdio->req_q_wq,
 659                                zfcp_fsf_sbal_check(qdio), 5 * HZ);
 660         if (ret > 0)
 661                 return 0;
 662         if (!ret) {
 663                 atomic_inc(&qdio->req_q_full);
 664                 /* assume hanging outbound queue, try queue recovery */
 665                 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
 666         }
 667
 668         spin_lock_bh(&qdio->req_q_lock);
 669         return -EIO;
 670 }
 671
 672 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 673 {
 674         struct zfcp_fsf_req *req;
 675
 676         if (likely(pool))
 677                 req = mempool_alloc(pool, GFP_ATOMIC);
 678         else
 679                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 680
 681         if (unlikely(!req))
 682                 return NULL;
 683
 684         memset(req, 0, sizeof(*req));
 685         req->pool = pool;
 686         return req;
 687 }
 688
 689 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 690 {
 691         struct fsf_qtcb *qtcb;
 692
 693         if (likely(pool))
 694                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 695         else
 696                 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
 697
 698         if (unlikely(!qtcb))
 699                 return NULL;
 700
 701         memset(qtcb, 0, sizeof(*qtcb));
 702         return qtcb;
 703 }
 704
 705 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 706                                                 u32 fsf_cmd, mempool_t *pool)
 707 {
 708         struct qdio_buffer_element *sbale;
 709         struct zfcp_qdio_queue *req_q = &qdio->req_q;
 710         struct zfcp_adapter *adapter = qdio->adapter;
 711         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 712
 713         if (unlikely(!req))
 714                 return ERR_PTR(-ENOMEM);
 715
 716         if (adapter->req_no == 0)
 717                 adapter->req_no++;
 718
 719         INIT_LIST_HEAD(&req->list);
 720         init_timer(&req->timer);
 721         init_completion(&req->completion);
 722
 723         req->adapter = adapter;
 724         req->fsf_command = fsf_cmd;
 725         req->req_id = adapter->req_no;
 726         req->queue_req.sbal_number = 1;
 727         req->queue_req.sbal_first = req_q->first;
 728         req->queue_req.sbal_last = req_q->first;
 729         req->queue_req.sbale_curr = 1;
 730
 731         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 732         sbale[0].addr = (void *) req->req_id;
 733         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 734
 735         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 736                 if (likely(pool))
 737                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 738                 else
 739                         req->qtcb = zfcp_qtcb_alloc(NULL);
 740
 741                 if (unlikely(!req->qtcb)) {
 742                         zfcp_fsf_req_free(req);
 743                         return ERR_PTR(-ENOMEM);
 744                 }
 745
 746                 req->seq_no = adapter->fsf_req_seq_no;
 747                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 748                 req->qtcb->prefix.req_id = req->req_id;
 749                 req->qtcb->prefix.ulp_info = 26;
 750                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 751                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 752                 req->qtcb->header.req_handle = req->req_id;
 753                 req->qtcb->header.fsf_command = req->fsf_command;
 754                 sbale[1].addr = (void *) req->qtcb;
 755                 sbale[1].length = sizeof(struct fsf_qtcb);
 756         }
 757
 758         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
 759                 zfcp_fsf_req_free(req);
 760                 return ERR_PTR(-EIO);
 761         }
 762
 763         return req;
 764 }
 765
 766 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 767 {
 768         struct zfcp_adapter *adapter = req->adapter;
 769         struct zfcp_qdio *qdio = adapter->qdio;
 770         int with_qtcb = (req->qtcb != NULL);
 771         int req_id = req->req_id;
 772
 773         zfcp_reqlist_add(adapter->req_list, req);
 774
 775         req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
 776         req->issued = get_clock();
 777         if (zfcp_qdio_send(qdio, &req->queue_req)) {
 778                 del_timer(&req->timer);
 779                 /* lookup request again, list might have changed */
 780                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 781                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
 782                 return -EIO;
 783         }
 784
 785         /* Don't increase for unsolicited status */
 786         if (with_qtcb)
 787                 adapter->fsf_req_seq_no++;
 788         adapter->req_no++;
 789
 790         return 0;
 791 }
 792
 793 /**
 794  * zfcp_fsf_status_read - send status read request
 795  * @adapter: pointer to struct zfcp_adapter
 796  * @req_flags: request flags
 797  * Returns: 0 on success, ERROR otherwise
 798  */
 799 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 800 {
 801         struct zfcp_adapter *adapter = qdio->adapter;
 802         struct zfcp_fsf_req *req;
 803         struct fsf_status_read_buffer *sr_buf;
 804         struct qdio_buffer_element *sbale;
 805         int retval = -EIO;
 806
 807         spin_lock_bh(&qdio->req_q_lock);
 808         if (zfcp_fsf_req_sbal_get(qdio))
 809                 goto out;
 810
 811         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 812                                   adapter->pool.status_read_req);
 813         if (IS_ERR(req)) {
 814                 retval = PTR_ERR(req);
 815                 goto out;
 816         }
 817
 818         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 819         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 820         req->queue_req.sbale_curr = 2;
 821
 822         sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 823         if (!sr_buf) {
 824                 retval = -ENOMEM;
 825                 goto failed_buf;
 826         }
 827         memset(sr_buf, 0, sizeof(*sr_buf));
 828         req->data = sr_buf;
 829         sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
 830         sbale->addr = (void *) sr_buf;
 831         sbale->length = sizeof(*sr_buf);
 832
 833         retval = zfcp_fsf_req_send(req);
 834         if (retval)
 835                 goto failed_req_send;
 836
 837         goto out;
 838
 839 failed_req_send:
 840         mempool_free(sr_buf, adapter->pool.status_read_data);
 841 failed_buf:
 842         zfcp_fsf_req_free(req);
 843         zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
 844 out:
 845         spin_unlock_bh(&qdio->req_q_lock);
 846         return retval;
 847 }
 848
 849 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 850 {
 851         struct zfcp_unit *unit = req->data;
 852         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 853
 854         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 855                 return;
 856
 857         switch (req->qtcb->header.fsf_status) {
 858         case FSF_PORT_HANDLE_NOT_VALID:
 859                 if (fsq->word[0] == fsq->word[1]) {
 860                         zfcp_erp_adapter_reopen(unit->port->adapter, 0,
 861                                                 "fsafch1", req);
 862                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 863                 }
 864                 break;
 865         case FSF_LUN_HANDLE_NOT_VALID:
 866                 if (fsq->word[0] == fsq->word[1]) {
 867                         zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
 868                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 869                 }
 870                 break;
 871         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 872                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 873                 break;
 874         case FSF_PORT_BOXED:
 875                 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
 876                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 877                 break;
 878         case FSF_LUN_BOXED:
 879                 zfcp_erp_unit_boxed(unit, "fsafch4", req);
 880                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 881                 break;
 882         case FSF_ADAPTER_STATUS_AVAILABLE:
 883                 switch (fsq->word[0]) {
 884                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 885                         zfcp_fc_test_link(unit->port);
 886                         /* fall through */
 887                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 888                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 889                         break;
 890                 }
 891                 break;
 892         case FSF_GOOD:
 893                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 894                 break;
 895         }
 896 }
 897
 898 /**
 899  * zfcp_fsf_abort_fcp_command - abort running SCSI command
 900  * @old_req_id: unsigned long
 901  * @unit: pointer to struct zfcp_unit
 902  * Returns: pointer to struct zfcp_fsf_req
 903  */
 904
 905 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 906                                                 struct zfcp_unit *unit)
 907 {
 908         struct qdio_buffer_element *sbale;
 909         struct zfcp_fsf_req *req = NULL;
 910         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
 911
 912         spin_lock_bh(&qdio->req_q_lock);
 913         if (zfcp_fsf_req_sbal_get(qdio))
 914                 goto out;
 915         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 916                                   qdio->adapter->pool.scsi_abort);
 917         if (IS_ERR(req)) {
 918                 req = NULL;
 919                 goto out;
 920         }
 921
 922         if (unlikely(!(atomic_read(&unit->status) &
 923                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 924                 goto out_error_free;
 925
 926         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 927         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 928         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 929
 930         req->data = unit;
 931         req->handler = zfcp_fsf_abort_fcp_command_handler;
 932         req->qtcb->header.lun_handle = unit->handle;
 933         req->qtcb->header.port_handle = unit->port->handle;
 934         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 935
 936         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 937         if (!zfcp_fsf_req_send(req))
 938                 goto out;
 939
 940 out_error_free:
 941         zfcp_fsf_req_free(req);
 942         req = NULL;
 943 out:
 944         spin_unlock_bh(&qdio->req_q_lock);
 945         return req;
 946 }
 947
 948 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 949 {
 950         struct zfcp_adapter *adapter = req->adapter;
 951         struct zfcp_fsf_ct_els *ct = req->data;
 952         struct fsf_qtcb_header *header = &req->qtcb->header;
 953
 954         ct->status = -EINVAL;
 955
 956         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 957                 goto skip_fsfstatus;
 958
 959         switch (header->fsf_status) {
 960         case FSF_GOOD:
 961                 zfcp_dbf_san_ct_response(req);
 962                 ct->status = 0;
 963                 break;
 964         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 965                 zfcp_fsf_class_not_supp(req);
 966                 break;
 967         case FSF_ADAPTER_STATUS_AVAILABLE:
 968                 switch (header->fsf_status_qual.word[0]){
 969                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 970                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 971                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 972                         break;
 973                 }
 974                 break;
 975         case FSF_ACCESS_DENIED:
 976                 break;
 977         case FSF_PORT_BOXED:
 978                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 979                 break;
 980         case FSF_PORT_HANDLE_NOT_VALID:
 981                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
 982                 /* fall through */
 983         case FSF_GENERIC_COMMAND_REJECTED:
 984         case FSF_PAYLOAD_SIZE_MISMATCH:
 985         case FSF_REQUEST_SIZE_TOO_LARGE:
 986         case FSF_RESPONSE_SIZE_TOO_LARGE:
 987         case FSF_SBAL_MISMATCH:
 988                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 989                 break;
 990         }
 991
 992 skip_fsfstatus:
 993         if (ct->handler)
 994                 ct->handler(ct->handler_data);
 995 }
 996
 997 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
 998                                             struct scatterlist *sg_req,
 999                                             struct scatterlist *sg_resp)
1000 {
1001         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1002         sbale[2].addr   = sg_virt(sg_req);
1003         sbale[2].length = sg_req->length;
1004         sbale[3].addr   = sg_virt(sg_resp);
1005         sbale[3].length = sg_resp->length;
1006         sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1007 }
1008
1009 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1010 {
1011         return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1012 }
1013
1014 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1015                                        struct scatterlist *sg_req,
1016                                        struct scatterlist *sg_resp,
1017                                        int max_sbals)
1018 {
1019         struct zfcp_adapter *adapter = req->adapter;
1020         struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1021                                                                &req->queue_req);
1022         u32 feat = adapter->adapter_features;
1023         int bytes;
1024
1025         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1026                 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1027                         return -EOPNOTSUPP;
1028
1029                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1030                 return 0;
1031         }
1032
1033         /* use single, unchained SBAL if it can hold the request */
1034         if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1035                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1036                 return 0;
1037         }
1038
1039         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1040                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1041                                         sg_req, max_sbals);
1042         if (bytes <= 0)
1043                 return -EIO;
1044         req->qtcb->bottom.support.req_buf_length = bytes;
1045         req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1046
1047         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1048                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1049                                         sg_resp, max_sbals);
1050         req->qtcb->bottom.support.resp_buf_length = bytes;
1051         if (bytes <= 0)
1052                 return -EIO;
1053
1054         return 0;
1055 }
1056
1057 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1058                                  struct scatterlist *sg_req,
1059                                  struct scatterlist *sg_resp,
1060                                  int max_sbals, unsigned int timeout)
1061 {
1062         int ret;
1063
1064         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1065         if (ret)
1066                 return ret;
1067
1068         /* common settings for ct/gs and els requests */
1069         if (timeout > 255)
1070                 timeout = 255; /* max value accepted by hardware */
1071         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1072         req->qtcb->bottom.support.timeout = timeout;
1073         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1074
1075         return 0;
1076 }
1077
1078 /**
1079  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1080  * @ct: pointer to struct zfcp_send_ct with data for request
1081  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1082  */
1083 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1084                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1085                      unsigned int timeout)
1086 {
1087         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1088         struct zfcp_fsf_req *req;
1089         int ret = -EIO;
1090
1091         spin_lock_bh(&qdio->req_q_lock);
1092         if (zfcp_fsf_req_sbal_get(qdio))
1093                 goto out;
1094
1095         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1096
1097         if (IS_ERR(req)) {
1098                 ret = PTR_ERR(req);
1099                 goto out;
1100         }
1101
1102         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1103         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1104                                     FSF_MAX_SBALS_PER_REQ, timeout);
1105         if (ret)
1106                 goto failed_send;
1107
1108         req->handler = zfcp_fsf_send_ct_handler;
1109         req->qtcb->header.port_handle = wka_port->handle;
1110         req->data = ct;
1111
1112         zfcp_dbf_san_ct_request(req, wka_port->d_id);
1113
1114         ret = zfcp_fsf_req_send(req);
1115         if (ret)
1116                 goto failed_send;
1117
1118         goto out;
1119
1120 failed_send:
1121         zfcp_fsf_req_free(req);
1122 out:
1123         spin_unlock_bh(&qdio->req_q_lock);
1124         return ret;
1125 }
1126
1127 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1128 {
1129         struct zfcp_fsf_ct_els *send_els = req->data;
1130         struct zfcp_port *port = send_els->port;
1131         struct fsf_qtcb_header *header = &req->qtcb->header;
1132
1133         send_els->status = -EINVAL;
1134
1135         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1136                 goto skip_fsfstatus;
1137
1138         switch (header->fsf_status) {
1139         case FSF_GOOD:
1140                 zfcp_dbf_san_els_response(req);
1141                 send_els->status = 0;
1142                 break;
1143         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1144                 zfcp_fsf_class_not_supp(req);
1145                 break;
1146         case FSF_ADAPTER_STATUS_AVAILABLE:
1147                 switch (header->fsf_status_qual.word[0]){
1148                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1149                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1150                 case FSF_SQ_RETRY_IF_POSSIBLE:
1151                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1152                         break;
1153                 }
1154                 break;
1155         case FSF_ELS_COMMAND_REJECTED:
1156         case FSF_PAYLOAD_SIZE_MISMATCH:
1157         case FSF_REQUEST_SIZE_TOO_LARGE:
1158         case FSF_RESPONSE_SIZE_TOO_LARGE:
1159                 break;
1160         case FSF_ACCESS_DENIED:
1161                 if (port)
1162                         zfcp_fsf_access_denied_port(req, port);
1163                 break;
1164         case FSF_SBAL_MISMATCH:
1165                 /* should never occure, avoided in zfcp_fsf_send_els */
1166                 /* fall through */
1167         default:
1168                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1169                 break;
1170         }
1171 skip_fsfstatus:
1172         if (send_els->handler)
1173                 send_els->handler(send_els->handler_data);
1174 }
1175
1176 /**
1177  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1178  * @els: pointer to struct zfcp_send_els with data for the command
1179  */
1180 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1181                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1182 {
1183         struct zfcp_fsf_req *req;
1184         struct zfcp_qdio *qdio = adapter->qdio;
1185         int ret = -EIO;
1186
1187         spin_lock_bh(&qdio->req_q_lock);
1188         if (zfcp_fsf_req_sbal_get(qdio))
1189                 goto out;
1190
1191         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1192
1193         if (IS_ERR(req)) {
1194                 ret = PTR_ERR(req);
1195                 goto out;
1196         }
1197
1198         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1199         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2, timeout);
1200
1201         if (ret)
1202                 goto failed_send;
1203
1204         hton24(req->qtcb->bottom.support.d_id, d_id);
1205         req->handler = zfcp_fsf_send_els_handler;
1206         req->data = els;
1207
1208         zfcp_dbf_san_els_request(req);
1209
1210         ret = zfcp_fsf_req_send(req);
1211         if (ret)
1212                 goto failed_send;
1213
1214         goto out;
1215
1216 failed_send:
1217         zfcp_fsf_req_free(req);
1218 out:
1219         spin_unlock_bh(&qdio->req_q_lock);
1220         return ret;
1221 }
1222
1223 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1224 {
1225         struct qdio_buffer_element *sbale;
1226         struct zfcp_fsf_req *req;
1227         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1228         int retval = -EIO;
1229
1230         spin_lock_bh(&qdio->req_q_lock);
1231         if (zfcp_fsf_req_sbal_get(qdio))
1232                 goto out;
1233
1234         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1235                                   qdio->adapter->pool.erp_req);
1236
1237         if (IS_ERR(req)) {
1238                 retval = PTR_ERR(req);
1239                 goto out;
1240         }
1241
1242         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1243         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1244         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1245         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1246
1247         req->qtcb->bottom.config.feature_selection =
1248                         FSF_FEATURE_CFDC |
1249                         FSF_FEATURE_LUN_SHARING |
1250                         FSF_FEATURE_NOTIFICATION_LOST |
1251                         FSF_FEATURE_UPDATE_ALERT;
1252         req->erp_action = erp_action;
1253         req->handler = zfcp_fsf_exchange_config_data_handler;
1254         erp_action->fsf_req_id = req->req_id;
1255
1256         zfcp_fsf_start_erp_timer(req);
1257         retval = zfcp_fsf_req_send(req);
1258         if (retval) {
1259                 zfcp_fsf_req_free(req);
1260                 erp_action->fsf_req_id = 0;
1261         }
1262 out:
1263         spin_unlock_bh(&qdio->req_q_lock);
1264         return retval;
1265 }
1266
1267 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1268                                        struct fsf_qtcb_bottom_config *data)
1269 {
1270         struct qdio_buffer_element *sbale;
1271         struct zfcp_fsf_req *req = NULL;
1272         int retval = -EIO;
1273
1274         spin_lock_bh(&qdio->req_q_lock);
1275         if (zfcp_fsf_req_sbal_get(qdio))
1276                 goto out_unlock;
1277
1278         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1279
1280         if (IS_ERR(req)) {
1281                 retval = PTR_ERR(req);
1282                 goto out_unlock;
1283         }
1284
1285         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1286         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1287         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1288         req->handler = zfcp_fsf_exchange_config_data_handler;
1289
1290         req->qtcb->bottom.config.feature_selection =
1291                         FSF_FEATURE_CFDC |
1292                         FSF_FEATURE_LUN_SHARING |
1293                         FSF_FEATURE_NOTIFICATION_LOST |
1294                         FSF_FEATURE_UPDATE_ALERT;
1295
1296         if (data)
1297                 req->data = data;
1298
1299         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1300         retval = zfcp_fsf_req_send(req);
1301         spin_unlock_bh(&qdio->req_q_lock);
1302         if (!retval)
1303                 wait_for_completion(&req->completion);
1304
1305         zfcp_fsf_req_free(req);
1306         return retval;
1307
1308 out_unlock:
1309         spin_unlock_bh(&qdio->req_q_lock);
1310         return retval;
1311 }
1312
1313 /**
1314  * zfcp_fsf_exchange_port_data - request information about local port
1315  * @erp_action: ERP action for the adapter for which port data is requested
1316  * Returns: 0 on success, error otherwise
1317  */
1318 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1319 {
1320         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1321         struct qdio_buffer_element *sbale;
1322         struct zfcp_fsf_req *req;
1323         int retval = -EIO;
1324
1325         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1326                 return -EOPNOTSUPP;
1327
1328         spin_lock_bh(&qdio->req_q_lock);
1329         if (zfcp_fsf_req_sbal_get(qdio))
1330                 goto out;
1331
1332         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1333                                   qdio->adapter->pool.erp_req);
1334
1335         if (IS_ERR(req)) {
1336                 retval = PTR_ERR(req);
1337                 goto out;
1338         }
1339
1340         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1341         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1342         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1343         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1344
1345         req->handler = zfcp_fsf_exchange_port_data_handler;
1346         req->erp_action = erp_action;
1347         erp_action->fsf_req_id = req->req_id;
1348
1349         zfcp_fsf_start_erp_timer(req);
1350         retval = zfcp_fsf_req_send(req);
1351         if (retval) {
1352                 zfcp_fsf_req_free(req);
1353                 erp_action->fsf_req_id = 0;
1354         }
1355 out:
1356         spin_unlock_bh(&qdio->req_q_lock);
1357         return retval;
1358 }
1359
1360 /**
1361  * zfcp_fsf_exchange_port_data_sync - request information about local port
1362  * @qdio: pointer to struct zfcp_qdio
1363  * @data: pointer to struct fsf_qtcb_bottom_port
1364  * Returns: 0 on success, error otherwise
1365  */
1366 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1367                                      struct fsf_qtcb_bottom_port *data)
1368 {
1369         struct qdio_buffer_element *sbale;
1370         struct zfcp_fsf_req *req = NULL;
1371         int retval = -EIO;
1372
1373         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1374                 return -EOPNOTSUPP;
1375
1376         spin_lock_bh(&qdio->req_q_lock);
1377         if (zfcp_fsf_req_sbal_get(qdio))
1378                 goto out_unlock;
1379
1380         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1381
1382         if (IS_ERR(req)) {
1383                 retval = PTR_ERR(req);
1384                 goto out_unlock;
1385         }
1386
1387         if (data)
1388                 req->data = data;
1389
1390         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1391         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1392         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1393
1394         req->handler = zfcp_fsf_exchange_port_data_handler;
1395         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1396         retval = zfcp_fsf_req_send(req);
1397         spin_unlock_bh(&qdio->req_q_lock);
1398
1399         if (!retval)
1400                 wait_for_completion(&req->completion);
1401
1402         zfcp_fsf_req_free(req);
1403
1404         return retval;
1405
1406 out_unlock:
1407         spin_unlock_bh(&qdio->req_q_lock);
1408         return retval;
1409 }
1410
1411 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1412 {
1413         struct zfcp_port *port = req->data;
1414         struct fsf_qtcb_header *header = &req->qtcb->header;
1415         struct fc_els_flogi *plogi;
1416
1417         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1418                 goto out;
1419
1420         switch (header->fsf_status) {
1421         case FSF_PORT_ALREADY_OPEN:
1422                 break;
1423         case FSF_ACCESS_DENIED:
1424                 zfcp_fsf_access_denied_port(req, port);
1425                 break;
1426         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1427                 dev_warn(&req->adapter->ccw_device->dev,
1428                          "Not enough FCP adapter resources to open "
1429                          "remote port 0x%016Lx\n",
1430                          (unsigned long long)port->wwpn);
1431                 zfcp_erp_port_failed(port, "fsoph_1", req);
1432                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1433                 break;
1434         case FSF_ADAPTER_STATUS_AVAILABLE:
1435                 switch (header->fsf_status_qual.word[0]) {
1436                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1437                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1438                 case FSF_SQ_NO_RETRY_POSSIBLE:
1439                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1440                         break;
1441                 }
1442                 break;
1443         case FSF_GOOD:
1444                 port->handle = header->port_handle;
1445                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1446                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1447                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1448                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1449                                   &port->status);
1450                 /* check whether D_ID has changed during open */
1451                 /*
1452                  * FIXME: This check is not airtight, as the FCP channel does
1453                  * not monitor closures of target port connections caused on
1454                  * the remote side. Thus, they might miss out on invalidating
1455                  * locally cached WWPNs (and other N_Port parameters) of gone
1456                  * target ports. So, our heroic attempt to make things safe
1457                  * could be undermined by 'open port' response data tagged with
1458                  * obsolete WWPNs. Another reason to monitor potential
1459                  * connection closures ourself at least (by interpreting
1460                  * incoming ELS' and unsolicited status). It just crosses my
1461                  * mind that one should be able to cross-check by means of
1462                  * another GID_PN straight after a port has been opened.
1463                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1464                  */
1465                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1466                 if (req->qtcb->bottom.support.els1_length >=
1467                     FSF_PLOGI_MIN_LEN)
1468                                 zfcp_fc_plogi_evaluate(port, plogi);
1469                 break;
1470         case FSF_UNKNOWN_OP_SUBTYPE:
1471                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1472                 break;
1473         }
1474
1475 out:
1476         put_device(&port->dev);
1477 }
1478
1479 /**
1480  * zfcp_fsf_open_port - create and send open port request
1481  * @erp_action: pointer to struct zfcp_erp_action
1482  * Returns: 0 on success, error otherwise
1483  */
1484 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1485 {
1486         struct qdio_buffer_element *sbale;
1487         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1488         struct zfcp_port *port = erp_action->port;
1489         struct zfcp_fsf_req *req;
1490         int retval = -EIO;
1491
1492         spin_lock_bh(&qdio->req_q_lock);
1493         if (zfcp_fsf_req_sbal_get(qdio))
1494                 goto out;
1495
1496         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1497                                   qdio->adapter->pool.erp_req);
1498
1499         if (IS_ERR(req)) {
1500                 retval = PTR_ERR(req);
1501                 goto out;
1502         }
1503
1504         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1505         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1506         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1507         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1508
1509         req->handler = zfcp_fsf_open_port_handler;
1510         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1511         req->data = port;
1512         req->erp_action = erp_action;
1513         erp_action->fsf_req_id = req->req_id;
1514         get_device(&port->dev);
1515
1516         zfcp_fsf_start_erp_timer(req);
1517         retval = zfcp_fsf_req_send(req);
1518         if (retval) {
1519                 zfcp_fsf_req_free(req);
1520                 erp_action->fsf_req_id = 0;
1521                 put_device(&port->dev);
1522         }
1523 out:
1524         spin_unlock_bh(&qdio->req_q_lock);
1525         return retval;
1526 }
1527
1528 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1529 {
1530         struct zfcp_port *port = req->data;
1531
1532         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1533                 return;
1534
1535         switch (req->qtcb->header.fsf_status) {
1536         case FSF_PORT_HANDLE_NOT_VALID:
1537                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1538                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1539                 break;
1540         case FSF_ADAPTER_STATUS_AVAILABLE:
1541                 break;
1542         case FSF_GOOD:
1543                 zfcp_erp_modify_port_status(port, "fscph_2", req,
1544                                             ZFCP_STATUS_COMMON_OPEN,
1545                                             ZFCP_CLEAR);
1546                 break;
1547         }
1548 }
1549
1550 /**
1551  * zfcp_fsf_close_port - create and send close port request
1552  * @erp_action: pointer to struct zfcp_erp_action
1553  * Returns: 0 on success, error otherwise
1554  */
1555 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1556 {
1557         struct qdio_buffer_element *sbale;
1558         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1559         struct zfcp_fsf_req *req;
1560         int retval = -EIO;
1561
1562         spin_lock_bh(&qdio->req_q_lock);
1563         if (zfcp_fsf_req_sbal_get(qdio))
1564                 goto out;
1565
1566         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1567                                   qdio->adapter->pool.erp_req);
1568
1569         if (IS_ERR(req)) {
1570                 retval = PTR_ERR(req);
1571                 goto out;
1572         }
1573
1574         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1575         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1576         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1577         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1578
1579         req->handler = zfcp_fsf_close_port_handler;
1580         req->data = erp_action->port;
1581         req->erp_action = erp_action;
1582         req->qtcb->header.port_handle = erp_action->port->handle;
1583         erp_action->fsf_req_id = req->req_id;
1584
1585         zfcp_fsf_start_erp_timer(req);
1586         retval = zfcp_fsf_req_send(req);
1587         if (retval) {
1588                 zfcp_fsf_req_free(req);
1589                 erp_action->fsf_req_id = 0;
1590         }
1591 out:
1592         spin_unlock_bh(&qdio->req_q_lock);
1593         return retval;
1594 }
1595
1596 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1597 {
1598         struct zfcp_fc_wka_port *wka_port = req->data;
1599         struct fsf_qtcb_header *header = &req->qtcb->header;
1600
1601         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1602                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1603                 goto out;
1604         }
1605
1606         switch (header->fsf_status) {
1607         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1608                 dev_warn(&req->adapter->ccw_device->dev,
1609                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1610                 /* fall through */
1611         case FSF_ADAPTER_STATUS_AVAILABLE:
1612                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1613                 /* fall through */
1614         case FSF_ACCESS_DENIED:
1615                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1616                 break;
1617         case FSF_GOOD:
1618                 wka_port->handle = header->port_handle;
1619                 /* fall through */
1620         case FSF_PORT_ALREADY_OPEN:
1621                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1622         }
1623 out:
1624         wake_up(&wka_port->completion_wq);
1625 }
1626
1627 /**
1628  * zfcp_fsf_open_wka_port - create and send open wka-port request
1629  * @wka_port: pointer to struct zfcp_fc_wka_port
1630  * Returns: 0 on success, error otherwise
1631  */
1632 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1633 {
1634         struct qdio_buffer_element *sbale;
1635         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1636         struct zfcp_fsf_req *req;
1637         int retval = -EIO;
1638
1639         spin_lock_bh(&qdio->req_q_lock);
1640         if (zfcp_fsf_req_sbal_get(qdio))
1641                 goto out;
1642
1643         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1644                                   qdio->adapter->pool.erp_req);
1645
1646         if (unlikely(IS_ERR(req))) {
1647                 retval = PTR_ERR(req);
1648                 goto out;
1649         }
1650
1651         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1652         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1653         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1654         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1655
1656         req->handler = zfcp_fsf_open_wka_port_handler;
1657         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1658         req->data = wka_port;
1659
1660         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1661         retval = zfcp_fsf_req_send(req);
1662         if (retval)
1663                 zfcp_fsf_req_free(req);
1664 out:
1665         spin_unlock_bh(&qdio->req_q_lock);
1666         return retval;
1667 }
1668
1669 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1670 {
1671         struct zfcp_fc_wka_port *wka_port = req->data;
1672
1673         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1674                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1675                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1676         }
1677
1678         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1679         wake_up(&wka_port->completion_wq);
1680 }
1681
1682 /**
1683  * zfcp_fsf_close_wka_port - create and send close wka port request
1684  * @wka_port: WKA port to open
1685  * Returns: 0 on success, error otherwise
1686  */
1687 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1688 {
1689         struct qdio_buffer_element *sbale;
1690         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1691         struct zfcp_fsf_req *req;
1692         int retval = -EIO;
1693
1694         spin_lock_bh(&qdio->req_q_lock);
1695         if (zfcp_fsf_req_sbal_get(qdio))
1696                 goto out;
1697
1698         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1699                                   qdio->adapter->pool.erp_req);
1700
1701         if (unlikely(IS_ERR(req))) {
1702                 retval = PTR_ERR(req);
1703                 goto out;
1704         }
1705
1706         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1707         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1708         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1709         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1710
1711         req->handler = zfcp_fsf_close_wka_port_handler;
1712         req->data = wka_port;
1713         req->qtcb->header.port_handle = wka_port->handle;
1714
1715         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1716         retval = zfcp_fsf_req_send(req);
1717         if (retval)
1718                 zfcp_fsf_req_free(req);
1719 out:
1720         spin_unlock_bh(&qdio->req_q_lock);
1721         return retval;
1722 }
1723
1724 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1725 {
1726         struct zfcp_port *port = req->data;
1727         struct fsf_qtcb_header *header = &req->qtcb->header;
1728         struct zfcp_unit *unit;
1729
1730         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1731                 return;
1732
1733         switch (header->fsf_status) {
1734         case FSF_PORT_HANDLE_NOT_VALID:
1735                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1736                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1737                 break;
1738         case FSF_ACCESS_DENIED:
1739                 zfcp_fsf_access_denied_port(req, port);
1740                 break;
1741         case FSF_PORT_BOXED:
1742                 /* can't use generic zfcp_erp_modify_port_status because
1743                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1744                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1745                 read_lock(&port->unit_list_lock);
1746                 list_for_each_entry(unit, &port->unit_list, list)
1747                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1748                                           &unit->status);
1749                 read_unlock(&port->unit_list_lock);
1750                 zfcp_erp_port_boxed(port, "fscpph2", req);
1751                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1752                 break;
1753         case FSF_ADAPTER_STATUS_AVAILABLE:
1754                 switch (header->fsf_status_qual.word[0]) {
1755                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1756                         /* fall through */
1757                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1758                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1759                         break;
1760                 }
1761                 break;
1762         case FSF_GOOD:
1763                 /* can't use generic zfcp_erp_modify_port_status because
1764                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1765                  */
1766                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1767                 read_lock(&port->unit_list_lock);
1768                 list_for_each_entry(unit, &port->unit_list, list)
1769                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1770                                           &unit->status);
1771                 read_unlock(&port->unit_list_lock);
1772                 break;
1773         }
1774 }
1775
1776 /**
1777  * zfcp_fsf_close_physical_port - close physical port
1778  * @erp_action: pointer to struct zfcp_erp_action
1779  * Returns: 0 on success
1780  */
1781 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1782 {
1783         struct qdio_buffer_element *sbale;
1784         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1785         struct zfcp_fsf_req *req;
1786         int retval = -EIO;
1787
1788         spin_lock_bh(&qdio->req_q_lock);
1789         if (zfcp_fsf_req_sbal_get(qdio))
1790                 goto out;
1791
1792         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1793                                   qdio->adapter->pool.erp_req);
1794
1795         if (IS_ERR(req)) {
1796                 retval = PTR_ERR(req);
1797                 goto out;
1798         }
1799
1800         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1801         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1802         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1803         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1804
1805         req->data = erp_action->port;
1806         req->qtcb->header.port_handle = erp_action->port->handle;
1807         req->erp_action = erp_action;
1808         req->handler = zfcp_fsf_close_physical_port_handler;
1809         erp_action->fsf_req_id = req->req_id;
1810
1811         zfcp_fsf_start_erp_timer(req);
1812         retval = zfcp_fsf_req_send(req);
1813         if (retval) {
1814                 zfcp_fsf_req_free(req);
1815                 erp_action->fsf_req_id = 0;
1816         }
1817 out:
1818         spin_unlock_bh(&qdio->req_q_lock);
1819         return retval;
1820 }
1821
1822 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1823 {
1824         struct zfcp_adapter *adapter = req->adapter;
1825         struct zfcp_unit *unit = req->data;
1826         struct fsf_qtcb_header *header = &req->qtcb->header;
1827         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1828         struct fsf_queue_designator *queue_designator =
1829                                 &header->fsf_status_qual.fsf_queue_designator;
1830         int exclusive, readwrite;
1831
1832         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1833                 return;
1834
1835         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1836                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1837                           ZFCP_STATUS_UNIT_SHARED |
1838                           ZFCP_STATUS_UNIT_READONLY,
1839                           &unit->status);
1840
1841         switch (header->fsf_status) {
1842
1843         case FSF_PORT_HANDLE_NOT_VALID:
1844                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1845                 /* fall through */
1846         case FSF_LUN_ALREADY_OPEN:
1847                 break;
1848         case FSF_ACCESS_DENIED:
1849                 zfcp_fsf_access_denied_unit(req, unit);
1850                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1851                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1852                 break;
1853         case FSF_PORT_BOXED:
1854                 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1855                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1856                 break;
1857         case FSF_LUN_SHARING_VIOLATION:
1858                 if (header->fsf_status_qual.word[0])
1859                         dev_warn(&adapter->ccw_device->dev,
1860                                  "LUN 0x%Lx on port 0x%Lx is already in "
1861                                  "use by CSS%d, MIF Image ID %x\n",
1862                                  (unsigned long long)unit->fcp_lun,
1863                                  (unsigned long long)unit->port->wwpn,
1864                                  queue_designator->cssid,
1865                                  queue_designator->hla);
1866                 else
1867                         zfcp_act_eval_err(adapter,
1868                                           header->fsf_status_qual.word[2]);
1869                 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1870                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1871                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1872                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1873                 break;
1874         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1875                 dev_warn(&adapter->ccw_device->dev,
1876                          "No handle is available for LUN "
1877                          "0x%016Lx on port 0x%016Lx\n",
1878                          (unsigned long long)unit->fcp_lun,
1879                          (unsigned long long)unit->port->wwpn);
1880                 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1881                 /* fall through */
1882         case FSF_INVALID_COMMAND_OPTION:
1883                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1884                 break;
1885         case FSF_ADAPTER_STATUS_AVAILABLE:
1886                 switch (header->fsf_status_qual.word[0]) {
1887                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1888                         zfcp_fc_test_link(unit->port);
1889                         /* fall through */
1890                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1891                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1892                         break;
1893                 }
1894                 break;
1895
1896         case FSF_GOOD:
1897                 unit->handle = header->lun_handle;
1898                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1899
1900                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1901                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1902                     !zfcp_ccw_priv_sch(adapter)) {
1903                         exclusive = (bottom->lun_access_info &
1904                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1905                         readwrite = (bottom->lun_access_info &
1906                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1907
1908                         if (!exclusive)
1909                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1910                                                 &unit->status);
1911
1912                         if (!readwrite) {
1913                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1914                                                 &unit->status);
1915                                 dev_info(&adapter->ccw_device->dev,
1916                                          "SCSI device at LUN 0x%016Lx on port "
1917                                          "0x%016Lx opened read-only\n",
1918                                          (unsigned long long)unit->fcp_lun,
1919                                          (unsigned long long)unit->port->wwpn);
1920                         }
1921
1922                         if (exclusive && !readwrite) {
1923                                 dev_err(&adapter->ccw_device->dev,
1924                                         "Exclusive read-only access not "
1925                                         "supported (unit 0x%016Lx, "
1926                                         "port 0x%016Lx)\n",
1927                                         (unsigned long long)unit->fcp_lun,
1928                                         (unsigned long long)unit->port->wwpn);
1929                                 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1930                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1931                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1932                         } else if (!exclusive && readwrite) {
1933                                 dev_err(&adapter->ccw_device->dev,
1934                                         "Shared read-write access not "
1935                                         "supported (unit 0x%016Lx, port "
1936                                         "0x%016Lx)\n",
1937                                         (unsigned long long)unit->fcp_lun,
1938                                         (unsigned long long)unit->port->wwpn);
1939                                 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1940                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1941                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1942                         }
1943                 }
1944                 break;
1945         }
1946 }
1947
1948 /**
1949  * zfcp_fsf_open_unit - open unit
1950  * @erp_action: pointer to struct zfcp_erp_action
1951  * Returns: 0 on success, error otherwise
1952  */
1953 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1954 {
1955         struct qdio_buffer_element *sbale;
1956         struct zfcp_adapter *adapter = erp_action->adapter;
1957         struct zfcp_qdio *qdio = adapter->qdio;
1958         struct zfcp_fsf_req *req;
1959         int retval = -EIO;
1960
1961         spin_lock_bh(&qdio->req_q_lock);
1962         if (zfcp_fsf_req_sbal_get(qdio))
1963                 goto out;
1964
1965         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1966                                   adapter->pool.erp_req);
1967
1968         if (IS_ERR(req)) {
1969                 retval = PTR_ERR(req);
1970                 goto out;
1971         }
1972
1973         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1974         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1975         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1976         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1977
1978         req->qtcb->header.port_handle = erp_action->port->handle;
1979         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1980         req->handler = zfcp_fsf_open_unit_handler;
1981         req->data = erp_action->unit;
1982         req->erp_action = erp_action;
1983         erp_action->fsf_req_id = req->req_id;
1984
1985         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1986                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1987
1988         zfcp_fsf_start_erp_timer(req);
1989         retval = zfcp_fsf_req_send(req);
1990         if (retval) {
1991                 zfcp_fsf_req_free(req);
1992                 erp_action->fsf_req_id = 0;
1993         }
1994 out:
1995         spin_unlock_bh(&qdio->req_q_lock);
1996         return retval;
1997 }
1998
1999 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2000 {
2001         struct zfcp_unit *unit = req->data;
2002
2003         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2004                 return;
2005
2006         switch (req->qtcb->header.fsf_status) {
2007         case FSF_PORT_HANDLE_NOT_VALID:
2008                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2009                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2010                 break;
2011         case FSF_LUN_HANDLE_NOT_VALID:
2012                 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2013                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2014                 break;
2015         case FSF_PORT_BOXED:
2016                 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2017                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2018                 break;
2019         case FSF_ADAPTER_STATUS_AVAILABLE:
2020                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2021                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2022                         zfcp_fc_test_link(unit->port);
2023                         /* fall through */
2024                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2025                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2026                         break;
2027                 }
2028                 break;
2029         case FSF_GOOD:
2030                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2031                 break;
2032         }
2033 }
2034
2035 /**
2036  * zfcp_fsf_close_unit - close zfcp unit
2037  * @erp_action: pointer to struct zfcp_unit
2038  * Returns: 0 on success, error otherwise
2039  */
2040 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2041 {
2042         struct qdio_buffer_element *sbale;
2043         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2044         struct zfcp_fsf_req *req;
2045         int retval = -EIO;
2046
2047         spin_lock_bh(&qdio->req_q_lock);
2048         if (zfcp_fsf_req_sbal_get(qdio))
2049                 goto out;
2050
2051         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2052                                   qdio->adapter->pool.erp_req);
2053
2054         if (IS_ERR(req)) {
2055                 retval = PTR_ERR(req);
2056                 goto out;
2057         }
2058
2059         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2060         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2061         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2062         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2063
2064         req->qtcb->header.port_handle = erp_action->port->handle;
2065         req->qtcb->header.lun_handle = erp_action->unit->handle;
2066         req->handler = zfcp_fsf_close_unit_handler;
2067         req->data = erp_action->unit;
2068         req->erp_action = erp_action;
2069         erp_action->fsf_req_id = req->req_id;
2070
2071         zfcp_fsf_start_erp_timer(req);
2072         retval = zfcp_fsf_req_send(req);
2073         if (retval) {
2074                 zfcp_fsf_req_free(req);
2075                 erp_action->fsf_req_id = 0;
2076         }
2077 out:
2078         spin_unlock_bh(&qdio->req_q_lock);
2079         return retval;
2080 }
2081
2082 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2083 {
2084         lat_rec->sum += lat;
2085         lat_rec->min = min(lat_rec->min, lat);
2086         lat_rec->max = max(lat_rec->max, lat);
2087 }
2088
2089 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2090 {
2091         struct fsf_qual_latency_info *lat_in;
2092         struct latency_cont *lat = NULL;
2093         struct zfcp_unit *unit = req->unit;
2094         struct zfcp_blk_drv_data blktrc;
2095         int ticks = req->adapter->timer_ticks;
2096
2097         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2098
2099         blktrc.flags = 0;
2100         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2101         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2102                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2103         blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2104         blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2105
2106         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2107                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2108                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2109                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2110
2111                 switch (req->qtcb->bottom.io.data_direction) {
2112                 case FSF_DATADIR_READ:
2113                         lat = &unit->latencies.read;
2114                         break;
2115                 case FSF_DATADIR_WRITE:
2116                         lat = &unit->latencies.write;
2117                         break;
2118                 case FSF_DATADIR_CMND:
2119                         lat = &unit->latencies.cmd;
2120                         break;
2121                 }
2122
2123                 if (lat) {
2124                         spin_lock(&unit->latencies.lock);
2125                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2126                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2127                         lat->counter++;
2128                         spin_unlock(&unit->latencies.lock);
2129                 }
2130         }
2131
2132         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2133                             sizeof(blktrc));
2134 }
2135
2136 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2137 {
2138         struct scsi_cmnd *scpnt;
2139         struct fcp_resp_with_ext *fcp_rsp;
2140         unsigned long flags;
2141
2142         read_lock_irqsave(&req->adapter->abort_lock, flags);
2143
2144         scpnt = req->data;
2145         if (unlikely(!scpnt)) {
2146                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2147                 return;
2148         }
2149
2150         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2151                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2152                 goto skip_fsfstatus;
2153         }
2154
2155         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2156         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2157
2158         zfcp_fsf_req_trace(req, scpnt);
2159
2160 skip_fsfstatus:
2161         zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req);
2162
2163         scpnt->host_scribble = NULL;
2164         (scpnt->scsi_done) (scpnt);
2165         /*
2166          * We must hold this lock until scsi_done has been called.
2167          * Otherwise we may call scsi_done after abort regarding this
2168          * command has completed.
2169          * Note: scsi_done must not block!
2170          */
2171         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2172 }
2173
2174 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2175 {
2176         struct fcp_resp_with_ext *fcp_rsp;
2177         struct fcp_resp_rsp_info *rsp_info;
2178
2179         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2180         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2181
2182         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2183              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2184                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2185 }
2186
2187
2188 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2189 {
2190         struct zfcp_unit *unit;
2191         struct fsf_qtcb_header *header = &req->qtcb->header;
2192
2193         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2194                 unit = req->data;
2195         else
2196                 unit = req->unit;
2197
2198         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2199                 goto skip_fsfstatus;
2200
2201         switch (header->fsf_status) {
2202         case FSF_HANDLE_MISMATCH:
2203         case FSF_PORT_HANDLE_NOT_VALID:
2204                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2205                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2206                 break;
2207         case FSF_FCPLUN_NOT_VALID:
2208         case FSF_LUN_HANDLE_NOT_VALID:
2209                 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2210                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2211                 break;
2212         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2213                 zfcp_fsf_class_not_supp(req);
2214                 break;
2215         case FSF_ACCESS_DENIED:
2216                 zfcp_fsf_access_denied_unit(req, unit);
2217                 break;
2218         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2219                 dev_err(&req->adapter->ccw_device->dev,
2220                         "Incorrect direction %d, unit 0x%016Lx on port "
2221                         "0x%016Lx closed\n",
2222                         req->qtcb->bottom.io.data_direction,
2223                         (unsigned long long)unit->fcp_lun,
2224                         (unsigned long long)unit->port->wwpn);
2225                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2226                                           req);
2227                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2228                 break;
2229         case FSF_CMND_LENGTH_NOT_VALID:
2230                 dev_err(&req->adapter->ccw_device->dev,
2231                         "Incorrect CDB length %d, unit 0x%016Lx on "
2232                         "port 0x%016Lx closed\n",
2233                         req->qtcb->bottom.io.fcp_cmnd_length,
2234                         (unsigned long long)unit->fcp_lun,
2235                         (unsigned long long)unit->port->wwpn);
2236                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2237                                           req);
2238                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2239                 break;
2240         case FSF_PORT_BOXED:
2241                 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2242                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2243                 break;
2244         case FSF_LUN_BOXED:
2245                 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2246                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2247                 break;
2248         case FSF_ADAPTER_STATUS_AVAILABLE:
2249                 if (header->fsf_status_qual.word[0] ==
2250                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2251                         zfcp_fc_test_link(unit->port);
2252                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2253                 break;
2254         }
2255 skip_fsfstatus:
2256         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2257                 zfcp_fsf_send_fcp_ctm_handler(req);
2258         else {
2259                 zfcp_fsf_send_fcp_command_task_handler(req);
2260                 req->unit = NULL;
2261                 put_device(&unit->dev);
2262         }
2263 }
2264
2265 /**
2266  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2267  * @unit: unit where command is sent to
2268  * @scsi_cmnd: scsi command to be sent
2269  */
2270 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2271                                    struct scsi_cmnd *scsi_cmnd)
2272 {
2273         struct zfcp_fsf_req *req;
2274         struct fcp_cmnd *fcp_cmnd;
2275         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2276         int real_bytes, retval = -EIO;
2277         struct zfcp_adapter *adapter = unit->port->adapter;
2278         struct zfcp_qdio *qdio = adapter->qdio;
2279
2280         if (unlikely(!(atomic_read(&unit->status) &
2281                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2282                 return -EBUSY;
2283
2284         spin_lock(&qdio->req_q_lock);
2285         if (atomic_read(&qdio->req_q.count) <= 0) {
2286                 atomic_inc(&qdio->req_q_full);
2287                 goto out;
2288         }
2289
2290         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2291                                   adapter->pool.scsi_req);
2292
2293         if (IS_ERR(req)) {
2294                 retval = PTR_ERR(req);
2295                 goto out;
2296         }
2297
2298         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2299         get_device(&unit->dev);
2300         req->unit = unit;
2301         req->data = scsi_cmnd;
2302         req->handler = zfcp_fsf_send_fcp_command_handler;
2303         req->qtcb->header.lun_handle = unit->handle;
2304         req->qtcb->header.port_handle = unit->port->handle;
2305         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2306         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2307
2308         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2309
2310         /*
2311          * set depending on data direction:
2312          *      data direction bits in SBALE (SB Type)
2313          *      data direction bits in QTCB
2314          */
2315         switch (scsi_cmnd->sc_data_direction) {
2316         case DMA_NONE:
2317                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2318                 break;
2319         case DMA_FROM_DEVICE:
2320                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2321                 break;
2322         case DMA_TO_DEVICE:
2323                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2324                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2325                 break;
2326         case DMA_BIDIRECTIONAL:
2327                 goto failed_scsi_cmnd;
2328         }
2329
2330         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2331         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2332
2333         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2334                                              scsi_sglist(scsi_cmnd),
2335                                              FSF_MAX_SBALS_PER_REQ);
2336         if (unlikely(real_bytes < 0)) {
2337                 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2338                         dev_err(&adapter->ccw_device->dev,
2339                                 "Oversize data package, unit 0x%016Lx "
2340                                 "on port 0x%016Lx closed\n",
2341                                 (unsigned long long)unit->fcp_lun,
2342                                 (unsigned long long)unit->port->wwpn);
2343                         zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2344                         retval = -EINVAL;
2345                 }
2346                 goto failed_scsi_cmnd;
2347         }
2348
2349         retval = zfcp_fsf_req_send(req);
2350         if (unlikely(retval))
2351                 goto failed_scsi_cmnd;
2352
2353         goto out;
2354
2355 failed_scsi_cmnd:
2356         put_device(&unit->dev);
2357         zfcp_fsf_req_free(req);
2358         scsi_cmnd->host_scribble = NULL;
2359 out:
2360         spin_unlock(&qdio->req_q_lock);
2361         return retval;
2362 }
2363
2364 /**
2365  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2366  * @unit: pointer to struct zfcp_unit
2367  * @tm_flags: unsigned byte for task management flags
2368  * Returns: on success pointer to struct fsf_req, NULL otherwise
2369  */
2370 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2371 {
2372         struct qdio_buffer_element *sbale;
2373         struct zfcp_fsf_req *req = NULL;
2374         struct fcp_cmnd *fcp_cmnd;
2375         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2376
2377         if (unlikely(!(atomic_read(&unit->status) &
2378                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2379                 return NULL;
2380
2381         spin_lock_bh(&qdio->req_q_lock);
2382         if (zfcp_fsf_req_sbal_get(qdio))
2383                 goto out;
2384
2385         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2386                                   qdio->adapter->pool.scsi_req);
2387
2388         if (IS_ERR(req)) {
2389                 req = NULL;
2390                 goto out;
2391         }
2392
2393         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2394         req->data = unit;
2395         req->handler = zfcp_fsf_send_fcp_command_handler;
2396         req->qtcb->header.lun_handle = unit->handle;
2397         req->qtcb->header.port_handle = unit->port->handle;
2398         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2399         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2400         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2401
2402         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2403         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2404         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2405
2406         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2407         zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2408
2409         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2410         if (!zfcp_fsf_req_send(req))
2411                 goto out;
2412
2413         zfcp_fsf_req_free(req);
2414         req = NULL;
2415 out:
2416         spin_unlock_bh(&qdio->req_q_lock);
2417         return req;
2418 }
2419
2420 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2421 {
2422 }
2423
2424 /**
2425  * zfcp_fsf_control_file - control file upload/download
2426  * @adapter: pointer to struct zfcp_adapter
2427  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2428  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2429  */
2430 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2431                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2432 {
2433         struct qdio_buffer_element *sbale;
2434         struct zfcp_qdio *qdio = adapter->qdio;
2435         struct zfcp_fsf_req *req = NULL;
2436         struct fsf_qtcb_bottom_support *bottom;
2437         int direction, retval = -EIO, bytes;
2438
2439         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2440                 return ERR_PTR(-EOPNOTSUPP);
2441
2442         switch (fsf_cfdc->command) {
2443         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2444                 direction = SBAL_FLAGS0_TYPE_WRITE;
2445                 break;
2446         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2447                 direction = SBAL_FLAGS0_TYPE_READ;
2448                 break;
2449         default:
2450                 return ERR_PTR(-EINVAL);
2451         }
2452
2453         spin_lock_bh(&qdio->req_q_lock);
2454         if (zfcp_fsf_req_sbal_get(qdio))
2455                 goto out;
2456
2457         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2458         if (IS_ERR(req)) {
2459                 retval = -EPERM;
2460                 goto out;
2461         }
2462
2463         req->handler = zfcp_fsf_control_file_handler;
2464
2465         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2466         sbale[0].flags |= direction;
2467
2468         bottom = &req->qtcb->bottom.support;
2469         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2470         bottom->option = fsf_cfdc->option;
2471
2472         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2473                                         direction, fsf_cfdc->sg,
2474                                         FSF_MAX_SBALS_PER_REQ);
2475         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2476                 zfcp_fsf_req_free(req);
2477                 goto out;
2478         }
2479
2480         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2481         retval = zfcp_fsf_req_send(req);
2482 out:
2483         spin_unlock_bh(&qdio->req_q_lock);
2484
2485         if (!retval) {
2486                 wait_for_completion(&req->completion);
2487                 return req;
2488         }
2489         return ERR_PTR(retval);
2490 }
2491
2492 /**
2493  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2494  * @adapter: pointer to struct zfcp_adapter
2495  * @sbal_idx: response queue index of SBAL to be processed
2496  */
2497 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2498 {
2499         struct zfcp_adapter *adapter = qdio->adapter;
2500         struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2501         struct qdio_buffer_element *sbale;
2502         struct zfcp_fsf_req *fsf_req;
2503         unsigned long req_id;
2504         int idx;
2505
2506         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2507
2508                 sbale = &sbal->element[idx];
2509                 req_id = (unsigned long) sbale->addr;
2510                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2511
2512                 if (!fsf_req)
2513                         /*
2514                          * Unknown request means that we have potentially memory
2515                          * corruption and must stop the machine immediately.
2516                          */
2517                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2518                               req_id, dev_name(&adapter->ccw_device->dev));
2519
2520                 fsf_req->queue_req.sbal_response = sbal_idx;
2521                 fsf_req->queue_req.qdio_inb_usage =
2522                         atomic_read(&qdio->resp_q.count);
2523                 zfcp_fsf_req_complete(fsf_req);
2524
2525                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2526                         break;
2527         }
2528 }