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

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2009
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include "zfcp_ext.h"
  14 #include "zfcp_dbf.h"
  15
  16 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  17 {
  18         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  19         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  20                                 "fsrth_1", NULL);
  21 }
  22
  23 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  24                                  unsigned long timeout)
  25 {
  26         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  27         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  28         fsf_req->timer.expires = jiffies + timeout;
  29         add_timer(&fsf_req->timer);
  30 }
  31
  32 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  33 {
  34         BUG_ON(!fsf_req->erp_action);
  35         fsf_req->timer.function = zfcp_erp_timeout_handler;
  36         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  37         fsf_req->timer.expires = jiffies + 30 * HZ;
  38         add_timer(&fsf_req->timer);
  39 }
  40
  41 /* association between FSF command and FSF QTCB type */
  42 static u32 fsf_qtcb_type[] = {
  43         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  44         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  45         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  46         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  47         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  48         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  49         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  50         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  51         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  52         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  53         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  54         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  56 };
  57
  58 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
  59 {
  60         u16 subtable = table >> 16;
  61         u16 rule = table & 0xffff;
  62         const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
  63
  64         if (subtable && subtable < ARRAY_SIZE(act_type))
  65                 dev_warn(&adapter->ccw_device->dev,
  66                          "Access denied according to ACT rule type %s, "
  67                          "rule %d\n", act_type[subtable], rule);
  68 }
  69
  70 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
  71                                         struct zfcp_port *port)
  72 {
  73         struct fsf_qtcb_header *header = &req->qtcb->header;
  74         dev_warn(&req->adapter->ccw_device->dev,
  75                  "Access denied to port 0x%016Lx\n",
  76                  (unsigned long long)port->wwpn);
  77         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  78         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  79         zfcp_erp_port_access_denied(port, "fspad_1", req);
  80         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  81 }
  82
  83 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
  84                                         struct zfcp_unit *unit)
  85 {
  86         struct fsf_qtcb_header *header = &req->qtcb->header;
  87         dev_warn(&req->adapter->ccw_device->dev,
  88                  "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
  89                  (unsigned long long)unit->fcp_lun,
  90                  (unsigned long long)unit->port->wwpn);
  91         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  92         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  93         zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
  94         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  95 }
  96
  97 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  98 {
  99         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
 100                 "operational because of an unsupported FC class\n");
 101         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
 102         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 103 }
 104
 105 /**
 106  * zfcp_fsf_req_free - free memory used by fsf request
 107  * @fsf_req: pointer to struct zfcp_fsf_req
 108  */
 109 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
 110 {
 111         if (likely(req->pool)) {
 112                 if (likely(req->qtcb))
 113                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
 114                 mempool_free(req, req->pool);
 115                 return;
 116         }
 117
 118         if (likely(req->qtcb))
 119                 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
 120         kfree(req);
 121 }
 122
 123 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 124 {
 125         struct fsf_status_read_buffer *sr_buf = req->data;
 126         struct zfcp_adapter *adapter = req->adapter;
 127         struct zfcp_port *port;
 128         int d_id = sr_buf->d_id & ZFCP_DID_MASK;
 129         unsigned long flags;
 130
 131         read_lock_irqsave(&zfcp_data.config_lock, flags);
 132         list_for_each_entry(port, &adapter->port_list_head, list)
 133                 if (port->d_id == d_id) {
 134                         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 135                         zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
 136                         return;
 137                 }
 138         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 139 }
 140
 141 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
 142                                          struct fsf_link_down_info *link_down)
 143 {
 144         struct zfcp_adapter *adapter = req->adapter;
 145         unsigned long flags;
 146
 147         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 148                 return;
 149
 150         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 151
 152         read_lock_irqsave(&zfcp_data.config_lock, flags);
 153         zfcp_scsi_schedule_rports_block(adapter);
 154         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 155
 156         if (!link_down)
 157                 goto out;
 158
 159         switch (link_down->error_code) {
 160         case FSF_PSQ_LINK_NO_LIGHT:
 161                 dev_warn(&req->adapter->ccw_device->dev,
 162                          "There is no light signal from the local "
 163                          "fibre channel cable\n");
 164                 break;
 165         case FSF_PSQ_LINK_WRAP_PLUG:
 166                 dev_warn(&req->adapter->ccw_device->dev,
 167                          "There is a wrap plug instead of a fibre "
 168                          "channel cable\n");
 169                 break;
 170         case FSF_PSQ_LINK_NO_FCP:
 171                 dev_warn(&req->adapter->ccw_device->dev,
 172                          "The adjacent fibre channel node does not "
 173                          "support FCP\n");
 174                 break;
 175         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 176                 dev_warn(&req->adapter->ccw_device->dev,
 177                          "The FCP device is suspended because of a "
 178                          "firmware update\n");
 179                 break;
 180         case FSF_PSQ_LINK_INVALID_WWPN:
 181                 dev_warn(&req->adapter->ccw_device->dev,
 182                          "The FCP device detected a WWPN that is "
 183                          "duplicate or not valid\n");
 184                 break;
 185         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 186                 dev_warn(&req->adapter->ccw_device->dev,
 187                          "The fibre channel fabric does not support NPIV\n");
 188                 break;
 189         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 190                 dev_warn(&req->adapter->ccw_device->dev,
 191                          "The FCP adapter cannot support more NPIV ports\n");
 192                 break;
 193         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 194                 dev_warn(&req->adapter->ccw_device->dev,
 195                          "The adjacent switch cannot support "
 196                          "more NPIV ports\n");
 197                 break;
 198         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 199                 dev_warn(&req->adapter->ccw_device->dev,
 200                          "The FCP adapter could not log in to the "
 201                          "fibre channel fabric\n");
 202                 break;
 203         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 204                 dev_warn(&req->adapter->ccw_device->dev,
 205                          "The WWPN assignment file on the FCP adapter "
 206                          "has been damaged\n");
 207                 break;
 208         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 209                 dev_warn(&req->adapter->ccw_device->dev,
 210                          "The mode table on the FCP adapter "
 211                          "has been damaged\n");
 212                 break;
 213         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 214                 dev_warn(&req->adapter->ccw_device->dev,
 215                          "All NPIV ports on the FCP adapter have "
 216                          "been assigned\n");
 217                 break;
 218         default:
 219                 dev_warn(&req->adapter->ccw_device->dev,
 220                          "The link between the FCP adapter and "
 221                          "the FC fabric is down\n");
 222         }
 223 out:
 224         zfcp_erp_adapter_failed(adapter, id, req);
 225 }
 226
 227 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 228 {
 229         struct fsf_status_read_buffer *sr_buf = req->data;
 230         struct fsf_link_down_info *ldi =
 231                 (struct fsf_link_down_info *) &sr_buf->payload;
 232
 233         switch (sr_buf->status_subtype) {
 234         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 235                 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
 236                 break;
 237         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 238                 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
 239                 break;
 240         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 241                 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
 242         };
 243 }
 244
 245 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 246 {
 247         struct zfcp_adapter *adapter = req->adapter;
 248         struct fsf_status_read_buffer *sr_buf = req->data;
 249
 250         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 251                 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
 252                 mempool_free(sr_buf, adapter->pool.status_read_data);
 253                 zfcp_fsf_req_free(req);
 254                 return;
 255         }
 256
 257         zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
 258
 259         switch (sr_buf->status_type) {
 260         case FSF_STATUS_READ_PORT_CLOSED:
 261                 zfcp_fsf_status_read_port_closed(req);
 262                 break;
 263         case FSF_STATUS_READ_INCOMING_ELS:
 264                 zfcp_fc_incoming_els(req);
 265                 break;
 266         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 267                 break;
 268         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 269                 dev_warn(&adapter->ccw_device->dev,
 270                          "The error threshold for checksum statistics "
 271                          "has been exceeded\n");
 272                 zfcp_hba_dbf_event_berr(adapter, req);
 273                 break;
 274         case FSF_STATUS_READ_LINK_DOWN:
 275                 zfcp_fsf_status_read_link_down(req);
 276                 break;
 277         case FSF_STATUS_READ_LINK_UP:
 278                 dev_info(&adapter->ccw_device->dev,
 279                          "The local link has been restored\n");
 280                 /* All ports should be marked as ready to run again */
 281                 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
 282                                                ZFCP_STATUS_COMMON_RUNNING,
 283                                                ZFCP_SET);
 284                 zfcp_erp_adapter_reopen(adapter,
 285                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 286                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 287                                         "fssrh_2", req);
 288                 break;
 289         case FSF_STATUS_READ_NOTIFICATION_LOST:
 290                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 291                         zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
 292                                                         req);
 293                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 294                         schedule_work(&adapter->scan_work);
 295                 break;
 296         case FSF_STATUS_READ_CFDC_UPDATED:
 297                 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
 298                 break;
 299         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 300                 adapter->adapter_features = sr_buf->payload.word[0];
 301                 break;
 302         }
 303
 304         mempool_free(sr_buf, adapter->pool.status_read_data);
 305         zfcp_fsf_req_free(req);
 306
 307         atomic_inc(&adapter->stat_miss);
 308         queue_work(adapter->work_queue, &adapter->stat_work);
 309 }
 310
 311 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 312 {
 313         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 314         case FSF_SQ_FCP_RSP_AVAILABLE:
 315         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 316         case FSF_SQ_NO_RETRY_POSSIBLE:
 317         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 318                 return;
 319         case FSF_SQ_COMMAND_ABORTED:
 320                 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
 321                 break;
 322         case FSF_SQ_NO_RECOM:
 323                 dev_err(&req->adapter->ccw_device->dev,
 324                         "The FCP adapter reported a problem "
 325                         "that cannot be recovered\n");
 326                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
 327                 break;
 328         }
 329         /* all non-return stats set FSFREQ_ERROR*/
 330         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 331 }
 332
 333 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 334 {
 335         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 336                 return;
 337
 338         switch (req->qtcb->header.fsf_status) {
 339         case FSF_UNKNOWN_COMMAND:
 340                 dev_err(&req->adapter->ccw_device->dev,
 341                         "The FCP adapter does not recognize the command 0x%x\n",
 342                         req->qtcb->header.fsf_command);
 343                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
 344                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 345                 break;
 346         case FSF_ADAPTER_STATUS_AVAILABLE:
 347                 zfcp_fsf_fsfstatus_qual_eval(req);
 348                 break;
 349         }
 350 }
 351
 352 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 353 {
 354         struct zfcp_adapter *adapter = req->adapter;
 355         struct fsf_qtcb *qtcb = req->qtcb;
 356         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 357
 358         zfcp_hba_dbf_event_fsf_response(req);
 359
 360         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 361                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 362                         ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
 363                 return;
 364         }
 365
 366         switch (qtcb->prefix.prot_status) {
 367         case FSF_PROT_GOOD:
 368         case FSF_PROT_FSF_STATUS_PRESENTED:
 369                 return;
 370         case FSF_PROT_QTCB_VERSION_ERROR:
 371                 dev_err(&adapter->ccw_device->dev,
 372                         "QTCB version 0x%x not supported by FCP adapter "
 373                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 374                         psq->word[0], psq->word[1]);
 375                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
 376                 break;
 377         case FSF_PROT_ERROR_STATE:
 378         case FSF_PROT_SEQ_NUMB_ERROR:
 379                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
 380                 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 381                 break;
 382         case FSF_PROT_UNSUPP_QTCB_TYPE:
 383                 dev_err(&adapter->ccw_device->dev,
 384                         "The QTCB type is not supported by the FCP adapter\n");
 385                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
 386                 break;
 387         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 388                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 389                                 &adapter->status);
 390                 break;
 391         case FSF_PROT_DUPLICATE_REQUEST_ID:
 392                 dev_err(&adapter->ccw_device->dev,
 393                         "0x%Lx is an ambiguous request identifier\n",
 394                         (unsigned long long)qtcb->bottom.support.req_handle);
 395                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
 396                 break;
 397         case FSF_PROT_LINK_DOWN:
 398                 zfcp_fsf_link_down_info_eval(req, "fspse_5",
 399                                              &psq->link_down_info);
 400                 /* FIXME: reopening adapter now? better wait for link up */
 401                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
 402                 break;
 403         case FSF_PROT_REEST_QUEUE:
 404                 /* All ports should be marked as ready to run again */
 405                 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
 406                                                ZFCP_STATUS_COMMON_RUNNING,
 407                                                ZFCP_SET);
 408                 zfcp_erp_adapter_reopen(adapter,
 409                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 410                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 411                                         "fspse_8", req);
 412                 break;
 413         default:
 414                 dev_err(&adapter->ccw_device->dev,
 415                         "0x%x is not a valid transfer protocol status\n",
 416                         qtcb->prefix.prot_status);
 417                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
 418         }
 419         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 420 }
 421
 422 /**
 423  * zfcp_fsf_req_complete - process completion of a FSF request
 424  * @fsf_req: The FSF request that has been completed.
 425  *
 426  * When a request has been completed either from the FCP adapter,
 427  * or it has been dismissed due to a queue shutdown, this function
 428  * is called to process the completion status and trigger further
 429  * events related to the FSF request.
 430  */
 431 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 432 {
 433         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 434                 zfcp_fsf_status_read_handler(req);
 435                 return;
 436         }
 437
 438         del_timer(&req->timer);
 439         zfcp_fsf_protstatus_eval(req);
 440         zfcp_fsf_fsfstatus_eval(req);
 441         req->handler(req);
 442
 443         if (req->erp_action)
 444                 zfcp_erp_notify(req->erp_action, 0);
 445
 446         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 447                 zfcp_fsf_req_free(req);
 448         else
 449                 complete(&req->completion);
 450 }
 451
 452 /**
 453  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 454  * @adapter: pointer to struct zfcp_adapter
 455  *
 456  * Never ever call this without shutting down the adapter first.
 457  * Otherwise the adapter would continue using and corrupting s390 storage.
 458  * Included BUG_ON() call to ensure this is done.
 459  * ERP is supposed to be the only user of this function.
 460  */
 461 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 462 {
 463         struct zfcp_fsf_req *req, *tmp;
 464         unsigned long flags;
 465         LIST_HEAD(remove_queue);
 466         unsigned int i;
 467
 468         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 469         spin_lock_irqsave(&adapter->req_list_lock, flags);
 470         for (i = 0; i < REQUEST_LIST_SIZE; i++)
 471                 list_splice_init(&adapter->req_list[i], &remove_queue);
 472         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 473
 474         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 475                 list_del(&req->list);
 476                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 477                 zfcp_fsf_req_complete(req);
 478         }
 479 }
 480
 481 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 482 {
 483         struct fsf_qtcb_bottom_config *bottom;
 484         struct zfcp_adapter *adapter = req->adapter;
 485         struct Scsi_Host *shost = adapter->scsi_host;
 486
 487         bottom = &req->qtcb->bottom.config;
 488
 489         if (req->data)
 490                 memcpy(req->data, bottom, sizeof(*bottom));
 491
 492         fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
 493         fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
 494         fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
 495         fc_host_speed(shost) = bottom->fc_link_speed;
 496         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 497
 498         adapter->hydra_version = bottom->adapter_type;
 499         adapter->timer_ticks = bottom->timer_interval;
 500
 501         if (fc_host_permanent_port_name(shost) == -1)
 502                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 503
 504         switch (bottom->fc_topology) {
 505         case FSF_TOPO_P2P:
 506                 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
 507                 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
 508                 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
 509                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 510                 break;
 511         case FSF_TOPO_FABRIC:
 512                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 513                 break;
 514         case FSF_TOPO_AL:
 515                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 516                 /* fall through */
 517         default:
 518                 dev_err(&adapter->ccw_device->dev,
 519                         "Unknown or unsupported arbitrated loop "
 520                         "fibre channel topology detected\n");
 521                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
 522                 return -EIO;
 523         }
 524
 525         return 0;
 526 }
 527
 528 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 529 {
 530         struct zfcp_adapter *adapter = req->adapter;
 531         struct fsf_qtcb *qtcb = req->qtcb;
 532         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 533         struct Scsi_Host *shost = adapter->scsi_host;
 534
 535         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 536                 return;
 537
 538         adapter->fsf_lic_version = bottom->lic_version;
 539         adapter->adapter_features = bottom->adapter_features;
 540         adapter->connection_features = bottom->connection_features;
 541         adapter->peer_wwpn = 0;
 542         adapter->peer_wwnn = 0;
 543         adapter->peer_d_id = 0;
 544
 545         switch (qtcb->header.fsf_status) {
 546         case FSF_GOOD:
 547                 if (zfcp_fsf_exchange_config_evaluate(req))
 548                         return;
 549
 550                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 551                         dev_err(&adapter->ccw_device->dev,
 552                                 "FCP adapter maximum QTCB size (%d bytes) "
 553                                 "is too small\n",
 554                                 bottom->max_qtcb_size);
 555                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
 556                         return;
 557                 }
 558                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 559                                 &adapter->status);
 560                 break;
 561         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 562                 fc_host_node_name(shost) = 0;
 563                 fc_host_port_name(shost) = 0;
 564                 fc_host_port_id(shost) = 0;
 565                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 566                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 567                 adapter->hydra_version = 0;
 568
 569                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 570                                 &adapter->status);
 571
 572                 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
 573                         &qtcb->header.fsf_status_qual.link_down_info);
 574                 break;
 575         default:
 576                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
 577                 return;
 578         }
 579
 580         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 581                 adapter->hardware_version = bottom->hardware_version;
 582                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 583                        min(FC_SERIAL_NUMBER_SIZE, 17));
 584                 EBCASC(fc_host_serial_number(shost),
 585                        min(FC_SERIAL_NUMBER_SIZE, 17));
 586         }
 587
 588         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 589                 dev_err(&adapter->ccw_device->dev,
 590                         "The FCP adapter only supports newer "
 591                         "control block versions\n");
 592                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
 593                 return;
 594         }
 595         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 596                 dev_err(&adapter->ccw_device->dev,
 597                         "The FCP adapter only supports older "
 598                         "control block versions\n");
 599                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
 600         }
 601 }
 602
 603 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 604 {
 605         struct zfcp_adapter *adapter = req->adapter;
 606         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 607         struct Scsi_Host *shost = adapter->scsi_host;
 608
 609         if (req->data)
 610                 memcpy(req->data, bottom, sizeof(*bottom));
 611
 612         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 613                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 614                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 615         } else
 616                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 617         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 618         fc_host_supported_speeds(shost) = bottom->supported_speed;
 619 }
 620
 621 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 622 {
 623         struct fsf_qtcb *qtcb = req->qtcb;
 624
 625         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 626                 return;
 627
 628         switch (qtcb->header.fsf_status) {
 629         case FSF_GOOD:
 630                 zfcp_fsf_exchange_port_evaluate(req);
 631                 break;
 632         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 633                 zfcp_fsf_exchange_port_evaluate(req);
 634                 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
 635                         &qtcb->header.fsf_status_qual.link_down_info);
 636                 break;
 637         }
 638 }
 639
 640 static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
 641 {
 642         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 643
 644         spin_lock_bh(&adapter->req_q_lock);
 645         if (atomic_read(&req_q->count))
 646                 return 1;
 647         spin_unlock_bh(&adapter->req_q_lock);
 648         return 0;
 649 }
 650
 651 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
 652 {
 653         long ret;
 654
 655         spin_unlock_bh(&adapter->req_q_lock);
 656         ret = wait_event_interruptible_timeout(adapter->request_wq,
 657                                zfcp_fsf_sbal_check(adapter), 5 * HZ);
 658         if (ret > 0)
 659                 return 0;
 660         if (!ret) {
 661                 atomic_inc(&adapter->qdio_outb_full);
 662                 /* assume hanging outbound queue, try queue recovery */
 663                 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
 664         }
 665
 666         spin_lock_bh(&adapter->req_q_lock);
 667         return -EIO;
 668 }
 669
 670 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 671 {
 672         struct zfcp_fsf_req *req;
 673
 674         if (likely(pool))
 675                 req = mempool_alloc(pool, GFP_ATOMIC);
 676         else
 677                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 678
 679         if (unlikely(!req))
 680                 return NULL;
 681
 682         memset(req, 0, sizeof(*req));
 683         req->pool = pool;
 684         return req;
 685 }
 686
 687 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 688 {
 689         struct fsf_qtcb *qtcb;
 690
 691         if (likely(pool))
 692                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 693         else
 694                 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
 695
 696         if (unlikely(!qtcb))
 697                 return NULL;
 698
 699         memset(qtcb, 0, sizeof(*qtcb));
 700         return qtcb;
 701 }
 702
 703 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
 704                                                 u32 fsf_cmd, mempool_t *pool)
 705 {
 706         struct qdio_buffer_element *sbale;
 707         struct zfcp_qdio_queue *req_q = &adapter->req_q;
 708         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 709
 710         if (unlikely(!req))
 711                 return ERR_PTR(-ENOMEM);
 712
 713         if (adapter->req_no == 0)
 714                 adapter->req_no++;
 715
 716         INIT_LIST_HEAD(&req->list);
 717         init_timer(&req->timer);
 718         init_completion(&req->completion);
 719
 720         req->adapter = adapter;
 721         req->fsf_command = fsf_cmd;
 722         req->req_id = adapter->req_no;
 723         req->queue_req.sbal_number = 1;
 724         req->queue_req.sbal_first = req_q->first;
 725         req->queue_req.sbal_last = req_q->first;
 726         req->queue_req.sbale_curr = 1;
 727
 728         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 729         sbale[0].addr = (void *) req->req_id;
 730         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 731
 732         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 733                 if (likely(pool))
 734                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 735                 else
 736                         req->qtcb = zfcp_qtcb_alloc(NULL);
 737
 738                 if (unlikely(!req->qtcb)) {
 739                         zfcp_fsf_req_free(req);
 740                         return ERR_PTR(-ENOMEM);
 741                 }
 742
 743                 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
 744                 req->qtcb->prefix.req_id = req->req_id;
 745                 req->qtcb->prefix.ulp_info = 26;
 746                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 747                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 748                 req->qtcb->header.req_handle = req->req_id;
 749                 req->qtcb->header.fsf_command = req->fsf_command;
 750                 req->seq_no = adapter->fsf_req_seq_no;
 751                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 752                 sbale[1].addr = (void *) req->qtcb;
 753                 sbale[1].length = sizeof(struct fsf_qtcb);
 754         }
 755
 756         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
 757                 zfcp_fsf_req_free(req);
 758                 return ERR_PTR(-EIO);
 759         }
 760
 761         return req;
 762 }
 763
 764 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 765 {
 766         struct zfcp_adapter *adapter = req->adapter;
 767         unsigned long        flags;
 768         int                  idx;
 769         int                  with_qtcb = (req->qtcb != NULL);
 770
 771         /* put allocated FSF request into hash table */
 772         spin_lock_irqsave(&adapter->req_list_lock, flags);
 773         idx = zfcp_reqlist_hash(req->req_id);
 774         list_add_tail(&req->list, &adapter->req_list[idx]);
 775         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 776
 777         req->queue_req.qdio_outb_usage = atomic_read(&adapter->req_q.count);
 778         req->issued = get_clock();
 779         if (zfcp_qdio_send(adapter, &req->queue_req)) {
 780                 del_timer(&req->timer);
 781                 spin_lock_irqsave(&adapter->req_list_lock, flags);
 782                 /* lookup request again, list might have changed */
 783                 if (zfcp_reqlist_find_safe(adapter, req))
 784                         zfcp_reqlist_remove(adapter, req);
 785                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 786                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
 787                 return -EIO;
 788         }
 789
 790         /* Don't increase for unsolicited status */
 791         if (with_qtcb)
 792                 adapter->fsf_req_seq_no++;
 793         adapter->req_no++;
 794
 795         return 0;
 796 }
 797
 798 /**
 799  * zfcp_fsf_status_read - send status read request
 800  * @adapter: pointer to struct zfcp_adapter
 801  * @req_flags: request flags
 802  * Returns: 0 on success, ERROR otherwise
 803  */
 804 int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
 805 {
 806         struct zfcp_fsf_req *req;
 807         struct fsf_status_read_buffer *sr_buf;
 808         struct qdio_buffer_element *sbale;
 809         int retval = -EIO;
 810
 811         spin_lock_bh(&adapter->req_q_lock);
 812         if (zfcp_fsf_req_sbal_get(adapter))
 813                 goto out;
 814
 815         req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 816                                   adapter->pool.status_read_req);
 817         if (IS_ERR(req)) {
 818                 retval = PTR_ERR(req);
 819                 goto out;
 820         }
 821
 822         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 823         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 824         req->queue_req.sbale_curr = 2;
 825
 826         sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 827         if (!sr_buf) {
 828                 retval = -ENOMEM;
 829                 goto failed_buf;
 830         }
 831         memset(sr_buf, 0, sizeof(*sr_buf));
 832         req->data = sr_buf;
 833         sbale = zfcp_qdio_sbale_curr(adapter, &req->queue_req);
 834         sbale->addr = (void *) sr_buf;
 835         sbale->length = sizeof(*sr_buf);
 836
 837         retval = zfcp_fsf_req_send(req);
 838         if (retval)
 839                 goto failed_req_send;
 840
 841         goto out;
 842
 843 failed_req_send:
 844         mempool_free(sr_buf, adapter->pool.status_read_data);
 845 failed_buf:
 846         zfcp_fsf_req_free(req);
 847         zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 848 out:
 849         spin_unlock_bh(&adapter->req_q_lock);
 850         return retval;
 851 }
 852
 853 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 854 {
 855         struct zfcp_unit *unit = req->data;
 856         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 857
 858         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 859                 return;
 860
 861         switch (req->qtcb->header.fsf_status) {
 862         case FSF_PORT_HANDLE_NOT_VALID:
 863                 if (fsq->word[0] == fsq->word[1]) {
 864                         zfcp_erp_adapter_reopen(unit->port->adapter, 0,
 865                                                 "fsafch1", req);
 866                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 867                 }
 868                 break;
 869         case FSF_LUN_HANDLE_NOT_VALID:
 870                 if (fsq->word[0] == fsq->word[1]) {
 871                         zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
 872                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 873                 }
 874                 break;
 875         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 876                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 877                 break;
 878         case FSF_PORT_BOXED:
 879                 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
 880                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 881                                ZFCP_STATUS_FSFREQ_RETRY;
 882                 break;
 883         case FSF_LUN_BOXED:
 884                 zfcp_erp_unit_boxed(unit, "fsafch4", req);
 885                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 886                                ZFCP_STATUS_FSFREQ_RETRY;
 887                 break;
 888         case FSF_ADAPTER_STATUS_AVAILABLE:
 889                 switch (fsq->word[0]) {
 890                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 891                         zfcp_test_link(unit->port);
 892                         /* fall through */
 893                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 894                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 895                         break;
 896                 }
 897                 break;
 898         case FSF_GOOD:
 899                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 900                 break;
 901         }
 902 }
 903
 904 /**
 905  * zfcp_fsf_abort_fcp_command - abort running SCSI command
 906  * @old_req_id: unsigned long
 907  * @unit: pointer to struct zfcp_unit
 908  * Returns: pointer to struct zfcp_fsf_req
 909  */
 910
 911 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 912                                                 struct zfcp_unit *unit)
 913 {
 914         struct qdio_buffer_element *sbale;
 915         struct zfcp_fsf_req *req = NULL;
 916         struct zfcp_adapter *adapter = unit->port->adapter;
 917
 918         spin_lock_bh(&adapter->req_q_lock);
 919         if (zfcp_fsf_req_sbal_get(adapter))
 920                 goto out;
 921         req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
 922                                   adapter->pool.scsi_abort);
 923         if (IS_ERR(req)) {
 924                 req = NULL;
 925                 goto out;
 926         }
 927
 928         if (unlikely(!(atomic_read(&unit->status) &
 929                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 930                 goto out_error_free;
 931
 932         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 933         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 934         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 935
 936         req->data = unit;
 937         req->handler = zfcp_fsf_abort_fcp_command_handler;
 938         req->qtcb->header.lun_handle = unit->handle;
 939         req->qtcb->header.port_handle = unit->port->handle;
 940         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 941
 942         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 943         if (!zfcp_fsf_req_send(req))
 944                 goto out;
 945
 946 out_error_free:
 947         zfcp_fsf_req_free(req);
 948         req = NULL;
 949 out:
 950         spin_unlock_bh(&adapter->req_q_lock);
 951         return req;
 952 }
 953
 954 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 955 {
 956         struct zfcp_adapter *adapter = req->adapter;
 957         struct zfcp_send_ct *send_ct = req->data;
 958         struct fsf_qtcb_header *header = &req->qtcb->header;
 959
 960         send_ct->status = -EINVAL;
 961
 962         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 963                 goto skip_fsfstatus;
 964
 965         switch (header->fsf_status) {
 966         case FSF_GOOD:
 967                 zfcp_san_dbf_event_ct_response(req);
 968                 send_ct->status = 0;
 969                 break;
 970         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 971                 zfcp_fsf_class_not_supp(req);
 972                 break;
 973         case FSF_ADAPTER_STATUS_AVAILABLE:
 974                 switch (header->fsf_status_qual.word[0]){
 975                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 976                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 977                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 978                         break;
 979                 }
 980                 break;
 981         case FSF_ACCESS_DENIED:
 982                 break;
 983         case FSF_PORT_BOXED:
 984                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 985                                ZFCP_STATUS_FSFREQ_RETRY;
 986                 break;
 987         case FSF_PORT_HANDLE_NOT_VALID:
 988                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
 989                 /* fall through */
 990         case FSF_GENERIC_COMMAND_REJECTED:
 991         case FSF_PAYLOAD_SIZE_MISMATCH:
 992         case FSF_REQUEST_SIZE_TOO_LARGE:
 993         case FSF_RESPONSE_SIZE_TOO_LARGE:
 994         case FSF_SBAL_MISMATCH:
 995                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 996                 break;
 997         }
 998
 999 skip_fsfstatus:
1000         if (send_ct->handler)
1001                 send_ct->handler(send_ct->handler_data);
1002 }
1003
1004 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1005                                             struct scatterlist *sg_req,
1006                                             struct scatterlist *sg_resp)
1007 {
1008         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1009         sbale[2].addr   = sg_virt(sg_req);
1010         sbale[2].length = sg_req->length;
1011         sbale[3].addr   = sg_virt(sg_resp);
1012         sbale[3].length = sg_resp->length;
1013         sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1014 }
1015
1016 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1017 {
1018         return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1019 }
1020
1021 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1022                                        struct scatterlist *sg_req,
1023                                        struct scatterlist *sg_resp,
1024                                        int max_sbals)
1025 {
1026         struct zfcp_adapter *adapter = req->adapter;
1027         struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter,
1028                                                                &req->queue_req);
1029         u32 feat = adapter->adapter_features;
1030         int bytes;
1031
1032         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1033                 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1034                         return -EOPNOTSUPP;
1035
1036                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1037                 return 0;
1038         }
1039
1040         /* use single, unchained SBAL if it can hold the request */
1041         if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1042                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1043                 return 0;
1044         }
1045
1046         bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req,
1047                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1048                                         sg_req, max_sbals);
1049         if (bytes <= 0)
1050                 return -EIO;
1051         req->qtcb->bottom.support.req_buf_length = bytes;
1052         req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1053
1054         bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req,
1055                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1056                                         sg_resp, max_sbals);
1057         if (bytes <= 0)
1058                 return -EIO;
1059         req->qtcb->bottom.support.resp_buf_length = bytes;
1060
1061         return 0;
1062 }
1063
1064 /**
1065  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1066  * @ct: pointer to struct zfcp_send_ct with data for request
1067  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1068  * @erp_action: if non-null the Generic Service request sent within ERP
1069  */
1070 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1071                      struct zfcp_erp_action *erp_action)
1072 {
1073         struct zfcp_wka_port *wka_port = ct->wka_port;
1074         struct zfcp_adapter *adapter = wka_port->adapter;
1075         struct zfcp_fsf_req *req;
1076         int ret = -EIO;
1077
1078         spin_lock_bh(&adapter->req_q_lock);
1079         if (zfcp_fsf_req_sbal_get(adapter))
1080                 goto out;
1081
1082         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, pool);
1083
1084         if (IS_ERR(req)) {
1085                 ret = PTR_ERR(req);
1086                 goto out;
1087         }
1088
1089         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1090         ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1091                                           FSF_MAX_SBALS_PER_REQ);
1092         if (ret)
1093                 goto failed_send;
1094
1095         req->handler = zfcp_fsf_send_ct_handler;
1096         req->qtcb->header.port_handle = wka_port->handle;
1097         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1098         req->qtcb->bottom.support.timeout = ct->timeout;
1099         req->data = ct;
1100
1101         zfcp_san_dbf_event_ct_request(req);
1102
1103         if (erp_action) {
1104                 erp_action->fsf_req = req;
1105                 req->erp_action = erp_action;
1106                 zfcp_fsf_start_erp_timer(req);
1107         } else
1108                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1109
1110         ret = zfcp_fsf_req_send(req);
1111         if (ret)
1112                 goto failed_send;
1113
1114         goto out;
1115
1116 failed_send:
1117         zfcp_fsf_req_free(req);
1118         if (erp_action)
1119                 erp_action->fsf_req = NULL;
1120 out:
1121         spin_unlock_bh(&adapter->req_q_lock);
1122         return ret;
1123 }
1124
1125 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1126 {
1127         struct zfcp_send_els *send_els = req->data;
1128         struct zfcp_port *port = send_els->port;
1129         struct fsf_qtcb_header *header = &req->qtcb->header;
1130
1131         send_els->status = -EINVAL;
1132
1133         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1134                 goto skip_fsfstatus;
1135
1136         switch (header->fsf_status) {
1137         case FSF_GOOD:
1138                 zfcp_san_dbf_event_els_response(req);
1139                 send_els->status = 0;
1140                 break;
1141         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1142                 zfcp_fsf_class_not_supp(req);
1143                 break;
1144         case FSF_ADAPTER_STATUS_AVAILABLE:
1145                 switch (header->fsf_status_qual.word[0]){
1146                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1147                         if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1148                                 zfcp_test_link(port);
1149                         /*fall through */
1150                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1151                 case FSF_SQ_RETRY_IF_POSSIBLE:
1152                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1153                         break;
1154                 }
1155                 break;
1156         case FSF_ELS_COMMAND_REJECTED:
1157         case FSF_PAYLOAD_SIZE_MISMATCH:
1158         case FSF_REQUEST_SIZE_TOO_LARGE:
1159         case FSF_RESPONSE_SIZE_TOO_LARGE:
1160                 break;
1161         case FSF_ACCESS_DENIED:
1162                 if (port)
1163                         zfcp_fsf_access_denied_port(req, port);
1164                 break;
1165         case FSF_SBAL_MISMATCH:
1166                 /* should never occure, avoided in zfcp_fsf_send_els */
1167                 /* fall through */
1168         default:
1169                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1170                 break;
1171         }
1172 skip_fsfstatus:
1173         if (send_els->handler)
1174                 send_els->handler(send_els->handler_data);
1175 }
1176
1177 /**
1178  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1179  * @els: pointer to struct zfcp_send_els with data for the command
1180  */
1181 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1182 {
1183         struct zfcp_fsf_req *req;
1184         struct zfcp_adapter *adapter = els->adapter;
1185         struct fsf_qtcb_bottom_support *bottom;
1186         int ret = -EIO;
1187
1188         spin_lock_bh(&adapter->req_q_lock);
1189         if (zfcp_fsf_req_sbal_get(adapter))
1190                 goto out;
1191
1192         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, NULL);
1193
1194         if (IS_ERR(req)) {
1195                 ret = PTR_ERR(req);
1196                 goto out;
1197         }
1198
1199         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1200         ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1201
1202         if (ret)
1203                 goto failed_send;
1204
1205         bottom = &req->qtcb->bottom.support;
1206         req->handler = zfcp_fsf_send_els_handler;
1207         bottom->d_id = els->d_id;
1208         bottom->service_class = FSF_CLASS_3;
1209         bottom->timeout = 2 * R_A_TOV;
1210         req->data = els;
1211
1212         zfcp_san_dbf_event_els_request(req);
1213
1214         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1215         ret = zfcp_fsf_req_send(req);
1216         if (ret)
1217                 goto failed_send;
1218
1219         goto out;
1220
1221 failed_send:
1222         zfcp_fsf_req_free(req);
1223 out:
1224         spin_unlock_bh(&adapter->req_q_lock);
1225         return ret;
1226 }
1227
1228 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1229 {
1230         struct qdio_buffer_element *sbale;
1231         struct zfcp_fsf_req *req;
1232         struct zfcp_adapter *adapter = erp_action->adapter;
1233         int retval = -EIO;
1234
1235         spin_lock_bh(&adapter->req_q_lock);
1236         if (zfcp_fsf_req_sbal_get(adapter))
1237                 goto out;
1238
1239         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1240                                   adapter->pool.erp_req);
1241
1242         if (IS_ERR(req)) {
1243                 retval = PTR_ERR(req);
1244                 goto out;
1245         }
1246
1247         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1248         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1249         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1250         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1251
1252         req->qtcb->bottom.config.feature_selection =
1253                         FSF_FEATURE_CFDC |
1254                         FSF_FEATURE_LUN_SHARING |
1255                         FSF_FEATURE_NOTIFICATION_LOST |
1256                         FSF_FEATURE_UPDATE_ALERT;
1257         req->erp_action = erp_action;
1258         req->handler = zfcp_fsf_exchange_config_data_handler;
1259         erp_action->fsf_req = req;
1260
1261         zfcp_fsf_start_erp_timer(req);
1262         retval = zfcp_fsf_req_send(req);
1263         if (retval) {
1264                 zfcp_fsf_req_free(req);
1265                 erp_action->fsf_req = NULL;
1266         }
1267 out:
1268         spin_unlock_bh(&adapter->req_q_lock);
1269         return retval;
1270 }
1271
1272 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1273                                        struct fsf_qtcb_bottom_config *data)
1274 {
1275         struct qdio_buffer_element *sbale;
1276         struct zfcp_fsf_req *req = NULL;
1277         int retval = -EIO;
1278
1279         spin_lock_bh(&adapter->req_q_lock);
1280         if (zfcp_fsf_req_sbal_get(adapter))
1281                 goto out_unlock;
1282
1283         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1284
1285         if (IS_ERR(req)) {
1286                 retval = PTR_ERR(req);
1287                 goto out_unlock;
1288         }
1289
1290         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1291         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1292         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1293         req->handler = zfcp_fsf_exchange_config_data_handler;
1294
1295         req->qtcb->bottom.config.feature_selection =
1296                         FSF_FEATURE_CFDC |
1297                         FSF_FEATURE_LUN_SHARING |
1298                         FSF_FEATURE_NOTIFICATION_LOST |
1299                         FSF_FEATURE_UPDATE_ALERT;
1300
1301         if (data)
1302                 req->data = data;
1303
1304         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1305         retval = zfcp_fsf_req_send(req);
1306         spin_unlock_bh(&adapter->req_q_lock);
1307         if (!retval)
1308                 wait_for_completion(&req->completion);
1309
1310         zfcp_fsf_req_free(req);
1311         return retval;
1312
1313 out_unlock:
1314         spin_unlock_bh(&adapter->req_q_lock);
1315         return retval;
1316 }
1317
1318 /**
1319  * zfcp_fsf_exchange_port_data - request information about local port
1320  * @erp_action: ERP action for the adapter for which port data is requested
1321  * Returns: 0 on success, error otherwise
1322  */
1323 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1324 {
1325         struct qdio_buffer_element *sbale;
1326         struct zfcp_fsf_req *req;
1327         struct zfcp_adapter *adapter = erp_action->adapter;
1328         int retval = -EIO;
1329
1330         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1331                 return -EOPNOTSUPP;
1332
1333         spin_lock_bh(&adapter->req_q_lock);
1334         if (zfcp_fsf_req_sbal_get(adapter))
1335                 goto out;
1336
1337         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1338                                   adapter->pool.erp_req);
1339
1340         if (IS_ERR(req)) {
1341                 retval = PTR_ERR(req);
1342                 goto out;
1343         }
1344
1345         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1346         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1347         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1348         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1349
1350         req->handler = zfcp_fsf_exchange_port_data_handler;
1351         req->erp_action = erp_action;
1352         erp_action->fsf_req = req;
1353
1354         zfcp_fsf_start_erp_timer(req);
1355         retval = zfcp_fsf_req_send(req);
1356         if (retval) {
1357                 zfcp_fsf_req_free(req);
1358                 erp_action->fsf_req = NULL;
1359         }
1360 out:
1361         spin_unlock_bh(&adapter->req_q_lock);
1362         return retval;
1363 }
1364
1365 /**
1366  * zfcp_fsf_exchange_port_data_sync - request information about local port
1367  * @adapter: pointer to struct zfcp_adapter
1368  * @data: pointer to struct fsf_qtcb_bottom_port
1369  * Returns: 0 on success, error otherwise
1370  */
1371 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1372                                      struct fsf_qtcb_bottom_port *data)
1373 {
1374         struct qdio_buffer_element *sbale;
1375         struct zfcp_fsf_req *req = NULL;
1376         int retval = -EIO;
1377
1378         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1379                 return -EOPNOTSUPP;
1380
1381         spin_lock_bh(&adapter->req_q_lock);
1382         if (zfcp_fsf_req_sbal_get(adapter))
1383                 goto out_unlock;
1384
1385         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1386
1387         if (IS_ERR(req)) {
1388                 retval = PTR_ERR(req);
1389                 goto out_unlock;
1390         }
1391
1392         if (data)
1393                 req->data = data;
1394
1395         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1396         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1397         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1398
1399         req->handler = zfcp_fsf_exchange_port_data_handler;
1400         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1401         retval = zfcp_fsf_req_send(req);
1402         spin_unlock_bh(&adapter->req_q_lock);
1403
1404         if (!retval)
1405                 wait_for_completion(&req->completion);
1406
1407         zfcp_fsf_req_free(req);
1408
1409         return retval;
1410
1411 out_unlock:
1412         spin_unlock_bh(&adapter->req_q_lock);
1413         return retval;
1414 }
1415
1416 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1417 {
1418         struct zfcp_port *port = req->data;
1419         struct fsf_qtcb_header *header = &req->qtcb->header;
1420         struct fsf_plogi *plogi;
1421
1422         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1423                 goto out;
1424
1425         switch (header->fsf_status) {
1426         case FSF_PORT_ALREADY_OPEN:
1427                 break;
1428         case FSF_ACCESS_DENIED:
1429                 zfcp_fsf_access_denied_port(req, port);
1430                 break;
1431         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1432                 dev_warn(&req->adapter->ccw_device->dev,
1433                          "Not enough FCP adapter resources to open "
1434                          "remote port 0x%016Lx\n",
1435                          (unsigned long long)port->wwpn);
1436                 zfcp_erp_port_failed(port, "fsoph_1", req);
1437                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1438                 break;
1439         case FSF_ADAPTER_STATUS_AVAILABLE:
1440                 switch (header->fsf_status_qual.word[0]) {
1441                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1442                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1443                 case FSF_SQ_NO_RETRY_POSSIBLE:
1444                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1445                         break;
1446                 }
1447                 break;
1448         case FSF_GOOD:
1449                 port->handle = header->port_handle;
1450                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1451                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1452                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1453                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1454                                   &port->status);
1455                 /* check whether D_ID has changed during open */
1456                 /*
1457                  * FIXME: This check is not airtight, as the FCP channel does
1458                  * not monitor closures of target port connections caused on
1459                  * the remote side. Thus, they might miss out on invalidating
1460                  * locally cached WWPNs (and other N_Port parameters) of gone
1461                  * target ports. So, our heroic attempt to make things safe
1462                  * could be undermined by 'open port' response data tagged with
1463                  * obsolete WWPNs. Another reason to monitor potential
1464                  * connection closures ourself at least (by interpreting
1465                  * incoming ELS' and unsolicited status). It just crosses my
1466                  * mind that one should be able to cross-check by means of
1467                  * another GID_PN straight after a port has been opened.
1468                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1469                  */
1470                 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1471                 if (req->qtcb->bottom.support.els1_length >=
1472                     FSF_PLOGI_MIN_LEN) {
1473                         if (plogi->serv_param.wwpn != port->wwpn)
1474                                 port->d_id = 0;
1475                         else {
1476                                 port->wwnn = plogi->serv_param.wwnn;
1477                                 zfcp_fc_plogi_evaluate(port, plogi);
1478                         }
1479                 }
1480                 break;
1481         case FSF_UNKNOWN_OP_SUBTYPE:
1482                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1483                 break;
1484         }
1485
1486 out:
1487         zfcp_port_put(port);
1488 }
1489
1490 /**
1491  * zfcp_fsf_open_port - create and send open port request
1492  * @erp_action: pointer to struct zfcp_erp_action
1493  * Returns: 0 on success, error otherwise
1494  */
1495 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1496 {
1497         struct qdio_buffer_element *sbale;
1498         struct zfcp_adapter *adapter = erp_action->adapter;
1499         struct zfcp_fsf_req *req;
1500         struct zfcp_port *port = erp_action->port;
1501         int retval = -EIO;
1502
1503         spin_lock_bh(&adapter->req_q_lock);
1504         if (zfcp_fsf_req_sbal_get(adapter))
1505                 goto out;
1506
1507         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
1508                                   adapter->pool.erp_req);
1509
1510         if (IS_ERR(req)) {
1511                 retval = PTR_ERR(req);
1512                 goto out;
1513         }
1514
1515         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1516         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1517         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1518         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1519
1520         req->handler = zfcp_fsf_open_port_handler;
1521         req->qtcb->bottom.support.d_id = port->d_id;
1522         req->data = port;
1523         req->erp_action = erp_action;
1524         erp_action->fsf_req = req;
1525         zfcp_port_get(port);
1526
1527         zfcp_fsf_start_erp_timer(req);
1528         retval = zfcp_fsf_req_send(req);
1529         if (retval) {
1530                 zfcp_fsf_req_free(req);
1531                 erp_action->fsf_req = NULL;
1532                 zfcp_port_put(port);
1533         }
1534 out:
1535         spin_unlock_bh(&adapter->req_q_lock);
1536         return retval;
1537 }
1538
1539 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1540 {
1541         struct zfcp_port *port = req->data;
1542
1543         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1544                 return;
1545
1546         switch (req->qtcb->header.fsf_status) {
1547         case FSF_PORT_HANDLE_NOT_VALID:
1548                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1549                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1550                 break;
1551         case FSF_ADAPTER_STATUS_AVAILABLE:
1552                 break;
1553         case FSF_GOOD:
1554                 zfcp_erp_modify_port_status(port, "fscph_2", req,
1555                                             ZFCP_STATUS_COMMON_OPEN,
1556                                             ZFCP_CLEAR);
1557                 break;
1558         }
1559 }
1560
1561 /**
1562  * zfcp_fsf_close_port - create and send close port request
1563  * @erp_action: pointer to struct zfcp_erp_action
1564  * Returns: 0 on success, error otherwise
1565  */
1566 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1567 {
1568         struct qdio_buffer_element *sbale;
1569         struct zfcp_adapter *adapter = erp_action->adapter;
1570         struct zfcp_fsf_req *req;
1571         int retval = -EIO;
1572
1573         spin_lock_bh(&adapter->req_q_lock);
1574         if (zfcp_fsf_req_sbal_get(adapter))
1575                 goto out;
1576
1577         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1578                                   adapter->pool.erp_req);
1579
1580         if (IS_ERR(req)) {
1581                 retval = PTR_ERR(req);
1582                 goto out;
1583         }
1584
1585         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1586         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1587         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1588         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1589
1590         req->handler = zfcp_fsf_close_port_handler;
1591         req->data = erp_action->port;
1592         req->erp_action = erp_action;
1593         req->qtcb->header.port_handle = erp_action->port->handle;
1594         erp_action->fsf_req = req;
1595
1596         zfcp_fsf_start_erp_timer(req);
1597         retval = zfcp_fsf_req_send(req);
1598         if (retval) {
1599                 zfcp_fsf_req_free(req);
1600                 erp_action->fsf_req = NULL;
1601         }
1602 out:
1603         spin_unlock_bh(&adapter->req_q_lock);
1604         return retval;
1605 }
1606
1607 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1608 {
1609         struct zfcp_wka_port *wka_port = req->data;
1610         struct fsf_qtcb_header *header = &req->qtcb->header;
1611
1612         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1613                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1614                 goto out;
1615         }
1616
1617         switch (header->fsf_status) {
1618         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1619                 dev_warn(&req->adapter->ccw_device->dev,
1620                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1621                 /* fall through */
1622         case FSF_ADAPTER_STATUS_AVAILABLE:
1623                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1624                 /* fall through */
1625         case FSF_ACCESS_DENIED:
1626                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1627                 break;
1628         case FSF_GOOD:
1629                 wka_port->handle = header->port_handle;
1630                 /* fall through */
1631         case FSF_PORT_ALREADY_OPEN:
1632                 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1633         }
1634 out:
1635         wake_up(&wka_port->completion_wq);
1636 }
1637
1638 /**
1639  * zfcp_fsf_open_wka_port - create and send open wka-port request
1640  * @wka_port: pointer to struct zfcp_wka_port
1641  * Returns: 0 on success, error otherwise
1642  */
1643 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1644 {
1645         struct qdio_buffer_element *sbale;
1646         struct zfcp_adapter *adapter = wka_port->adapter;
1647         struct zfcp_fsf_req *req;
1648         int retval = -EIO;
1649
1650         spin_lock_bh(&adapter->req_q_lock);
1651         if (zfcp_fsf_req_sbal_get(adapter))
1652                 goto out;
1653
1654         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
1655                                   adapter->pool.erp_req);
1656
1657         if (unlikely(IS_ERR(req))) {
1658                 retval = PTR_ERR(req);
1659                 goto out;
1660         }
1661
1662         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1663         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1664         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1665         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1666
1667         req->handler = zfcp_fsf_open_wka_port_handler;
1668         req->qtcb->bottom.support.d_id = wka_port->d_id;
1669         req->data = wka_port;
1670
1671         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1672         retval = zfcp_fsf_req_send(req);
1673         if (retval)
1674                 zfcp_fsf_req_free(req);
1675 out:
1676         spin_unlock_bh(&adapter->req_q_lock);
1677         return retval;
1678 }
1679
1680 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1681 {
1682         struct zfcp_wka_port *wka_port = req->data;
1683
1684         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1685                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1686                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1687         }
1688
1689         wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1690         wake_up(&wka_port->completion_wq);
1691 }
1692
1693 /**
1694  * zfcp_fsf_close_wka_port - create and send close wka port request
1695  * @erp_action: pointer to struct zfcp_erp_action
1696  * Returns: 0 on success, error otherwise
1697  */
1698 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1699 {
1700         struct qdio_buffer_element *sbale;
1701         struct zfcp_adapter *adapter = wka_port->adapter;
1702         struct zfcp_fsf_req *req;
1703         int retval = -EIO;
1704
1705         spin_lock_bh(&adapter->req_q_lock);
1706         if (zfcp_fsf_req_sbal_get(adapter))
1707                 goto out;
1708
1709         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1710                                   adapter->pool.erp_req);
1711
1712         if (unlikely(IS_ERR(req))) {
1713                 retval = PTR_ERR(req);
1714                 goto out;
1715         }
1716
1717         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1718         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1719         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1720         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1721
1722         req->handler = zfcp_fsf_close_wka_port_handler;
1723         req->data = wka_port;
1724         req->qtcb->header.port_handle = wka_port->handle;
1725
1726         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1727         retval = zfcp_fsf_req_send(req);
1728         if (retval)
1729                 zfcp_fsf_req_free(req);
1730 out:
1731         spin_unlock_bh(&adapter->req_q_lock);
1732         return retval;
1733 }
1734
1735 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1736 {
1737         struct zfcp_port *port = req->data;
1738         struct fsf_qtcb_header *header = &req->qtcb->header;
1739         struct zfcp_unit *unit;
1740
1741         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1742                 return;
1743
1744         switch (header->fsf_status) {
1745         case FSF_PORT_HANDLE_NOT_VALID:
1746                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1747                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1748                 break;
1749         case FSF_ACCESS_DENIED:
1750                 zfcp_fsf_access_denied_port(req, port);
1751                 break;
1752         case FSF_PORT_BOXED:
1753                 /* can't use generic zfcp_erp_modify_port_status because
1754                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1755                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1756                 list_for_each_entry(unit, &port->unit_list_head, list)
1757                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1758                                           &unit->status);
1759                 zfcp_erp_port_boxed(port, "fscpph2", req);
1760                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1761                                ZFCP_STATUS_FSFREQ_RETRY;
1762
1763                 break;
1764         case FSF_ADAPTER_STATUS_AVAILABLE:
1765                 switch (header->fsf_status_qual.word[0]) {
1766                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1767                         /* fall through */
1768                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1769                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1770                         break;
1771                 }
1772                 break;
1773         case FSF_GOOD:
1774                 /* can't use generic zfcp_erp_modify_port_status because
1775                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1776                  */
1777                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1778                 list_for_each_entry(unit, &port->unit_list_head, list)
1779                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1780                                           &unit->status);
1781                 break;
1782         }
1783 }
1784
1785 /**
1786  * zfcp_fsf_close_physical_port - close physical port
1787  * @erp_action: pointer to struct zfcp_erp_action
1788  * Returns: 0 on success
1789  */
1790 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1791 {
1792         struct qdio_buffer_element *sbale;
1793         struct zfcp_adapter *adapter = erp_action->adapter;
1794         struct zfcp_fsf_req *req;
1795         int retval = -EIO;
1796
1797         spin_lock_bh(&adapter->req_q_lock);
1798         if (zfcp_fsf_req_sbal_get(adapter))
1799                 goto out;
1800
1801         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1802                                   adapter->pool.erp_req);
1803
1804         if (IS_ERR(req)) {
1805                 retval = PTR_ERR(req);
1806                 goto out;
1807         }
1808
1809         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1810         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1811         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1812         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1813
1814         req->data = erp_action->port;
1815         req->qtcb->header.port_handle = erp_action->port->handle;
1816         req->erp_action = erp_action;
1817         req->handler = zfcp_fsf_close_physical_port_handler;
1818         erp_action->fsf_req = req;
1819
1820         zfcp_fsf_start_erp_timer(req);
1821         retval = zfcp_fsf_req_send(req);
1822         if (retval) {
1823                 zfcp_fsf_req_free(req);
1824                 erp_action->fsf_req = NULL;
1825         }
1826 out:
1827         spin_unlock_bh(&adapter->req_q_lock);
1828         return retval;
1829 }
1830
1831 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1832 {
1833         struct zfcp_adapter *adapter = req->adapter;
1834         struct zfcp_unit *unit = req->data;
1835         struct fsf_qtcb_header *header = &req->qtcb->header;
1836         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1837         struct fsf_queue_designator *queue_designator =
1838                                 &header->fsf_status_qual.fsf_queue_designator;
1839         int exclusive, readwrite;
1840
1841         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1842                 return;
1843
1844         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1845                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1846                           ZFCP_STATUS_UNIT_SHARED |
1847                           ZFCP_STATUS_UNIT_READONLY,
1848                           &unit->status);
1849
1850         switch (header->fsf_status) {
1851
1852         case FSF_PORT_HANDLE_NOT_VALID:
1853                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1854                 /* fall through */
1855         case FSF_LUN_ALREADY_OPEN:
1856                 break;
1857         case FSF_ACCESS_DENIED:
1858                 zfcp_fsf_access_denied_unit(req, unit);
1859                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1860                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1861                 break;
1862         case FSF_PORT_BOXED:
1863                 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1864                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1865                                ZFCP_STATUS_FSFREQ_RETRY;
1866                 break;
1867         case FSF_LUN_SHARING_VIOLATION:
1868                 if (header->fsf_status_qual.word[0])
1869                         dev_warn(&adapter->ccw_device->dev,
1870                                  "LUN 0x%Lx on port 0x%Lx is already in "
1871                                  "use by CSS%d, MIF Image ID %x\n",
1872                                  (unsigned long long)unit->fcp_lun,
1873                                  (unsigned long long)unit->port->wwpn,
1874                                  queue_designator->cssid,
1875                                  queue_designator->hla);
1876                 else
1877                         zfcp_act_eval_err(adapter,
1878                                           header->fsf_status_qual.word[2]);
1879                 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1880                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1881                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1882                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1883                 break;
1884         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1885                 dev_warn(&adapter->ccw_device->dev,
1886                          "No handle is available for LUN "
1887                          "0x%016Lx on port 0x%016Lx\n",
1888                          (unsigned long long)unit->fcp_lun,
1889                          (unsigned long long)unit->port->wwpn);
1890                 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1891                 /* fall through */
1892         case FSF_INVALID_COMMAND_OPTION:
1893                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1894                 break;
1895         case FSF_ADAPTER_STATUS_AVAILABLE:
1896                 switch (header->fsf_status_qual.word[0]) {
1897                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1898                         zfcp_test_link(unit->port);
1899                         /* fall through */
1900                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1901                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1902                         break;
1903                 }
1904                 break;
1905
1906         case FSF_GOOD:
1907                 unit->handle = header->lun_handle;
1908                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1909
1910                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1911                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1912                     !zfcp_ccw_priv_sch(adapter)) {
1913                         exclusive = (bottom->lun_access_info &
1914                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1915                         readwrite = (bottom->lun_access_info &
1916                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1917
1918                         if (!exclusive)
1919                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1920                                                 &unit->status);
1921
1922                         if (!readwrite) {
1923                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1924                                                 &unit->status);
1925                                 dev_info(&adapter->ccw_device->dev,
1926                                          "SCSI device at LUN 0x%016Lx on port "
1927                                          "0x%016Lx opened read-only\n",
1928                                          (unsigned long long)unit->fcp_lun,
1929                                          (unsigned long long)unit->port->wwpn);
1930                         }
1931
1932                         if (exclusive && !readwrite) {
1933                                 dev_err(&adapter->ccw_device->dev,
1934                                         "Exclusive read-only access not "
1935                                         "supported (unit 0x%016Lx, "
1936                                         "port 0x%016Lx)\n",
1937                                         (unsigned long long)unit->fcp_lun,
1938                                         (unsigned long long)unit->port->wwpn);
1939                                 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1940                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1941                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1942                         } else if (!exclusive && readwrite) {
1943                                 dev_err(&adapter->ccw_device->dev,
1944                                         "Shared read-write access not "
1945                                         "supported (unit 0x%016Lx, port "
1946                                         "0x%016Lx)\n",
1947                                         (unsigned long long)unit->fcp_lun,
1948                                         (unsigned long long)unit->port->wwpn);
1949                                 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1950                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1951                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1952                         }
1953                 }
1954                 break;
1955         }
1956 }
1957
1958 /**
1959  * zfcp_fsf_open_unit - open unit
1960  * @erp_action: pointer to struct zfcp_erp_action
1961  * Returns: 0 on success, error otherwise
1962  */
1963 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1964 {
1965         struct qdio_buffer_element *sbale;
1966         struct zfcp_adapter *adapter = erp_action->adapter;
1967         struct zfcp_fsf_req *req;
1968         int retval = -EIO;
1969
1970         spin_lock_bh(&adapter->req_q_lock);
1971         if (zfcp_fsf_req_sbal_get(adapter))
1972                 goto out;
1973
1974         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1975                                   adapter->pool.erp_req);
1976
1977         if (IS_ERR(req)) {
1978                 retval = PTR_ERR(req);
1979                 goto out;
1980         }
1981
1982         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1983         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
1984         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1985         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1986
1987         req->qtcb->header.port_handle = erp_action->port->handle;
1988         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1989         req->handler = zfcp_fsf_open_unit_handler;
1990         req->data = erp_action->unit;
1991         req->erp_action = erp_action;
1992         erp_action->fsf_req = req;
1993
1994         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1995                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1996
1997         zfcp_fsf_start_erp_timer(req);
1998         retval = zfcp_fsf_req_send(req);
1999         if (retval) {
2000                 zfcp_fsf_req_free(req);
2001                 erp_action->fsf_req = NULL;
2002         }
2003 out:
2004         spin_unlock_bh(&adapter->req_q_lock);
2005         return retval;
2006 }
2007
2008 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2009 {
2010         struct zfcp_unit *unit = req->data;
2011
2012         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2013                 return;
2014
2015         switch (req->qtcb->header.fsf_status) {
2016         case FSF_PORT_HANDLE_NOT_VALID:
2017                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2018                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2019                 break;
2020         case FSF_LUN_HANDLE_NOT_VALID:
2021                 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2022                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2023                 break;
2024         case FSF_PORT_BOXED:
2025                 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2026                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2027                                ZFCP_STATUS_FSFREQ_RETRY;
2028                 break;
2029         case FSF_ADAPTER_STATUS_AVAILABLE:
2030                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2031                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2032                         zfcp_test_link(unit->port);
2033                         /* fall through */
2034                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2035                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2036                         break;
2037                 }
2038                 break;
2039         case FSF_GOOD:
2040                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2041                 break;
2042         }
2043 }
2044
2045 /**
2046  * zfcp_fsf_close_unit - close zfcp unit
2047  * @erp_action: pointer to struct zfcp_unit
2048  * Returns: 0 on success, error otherwise
2049  */
2050 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2051 {
2052         struct qdio_buffer_element *sbale;
2053         struct zfcp_adapter *adapter = erp_action->adapter;
2054         struct zfcp_fsf_req *req;
2055         int retval = -EIO;
2056
2057         spin_lock_bh(&adapter->req_q_lock);
2058         if (zfcp_fsf_req_sbal_get(adapter))
2059                 goto out;
2060
2061         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2062                                   adapter->pool.erp_req);
2063
2064         if (IS_ERR(req)) {
2065                 retval = PTR_ERR(req);
2066                 goto out;
2067         }
2068
2069         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2070         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
2071         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2072         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2073
2074         req->qtcb->header.port_handle = erp_action->port->handle;
2075         req->qtcb->header.lun_handle = erp_action->unit->handle;
2076         req->handler = zfcp_fsf_close_unit_handler;
2077         req->data = erp_action->unit;
2078         req->erp_action = erp_action;
2079         erp_action->fsf_req = req;
2080
2081         zfcp_fsf_start_erp_timer(req);
2082         retval = zfcp_fsf_req_send(req);
2083         if (retval) {
2084                 zfcp_fsf_req_free(req);
2085                 erp_action->fsf_req = NULL;
2086         }
2087 out:
2088         spin_unlock_bh(&adapter->req_q_lock);
2089         return retval;
2090 }
2091
2092 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2093 {
2094         lat_rec->sum += lat;
2095         lat_rec->min = min(lat_rec->min, lat);
2096         lat_rec->max = max(lat_rec->max, lat);
2097 }
2098
2099 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2100 {
2101         struct fsf_qual_latency_info *lat_inf;
2102         struct latency_cont *lat;
2103         struct zfcp_unit *unit = req->unit;
2104
2105         lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2106
2107         switch (req->qtcb->bottom.io.data_direction) {
2108         case FSF_DATADIR_READ:
2109                 lat = &unit->latencies.read;
2110                 break;
2111         case FSF_DATADIR_WRITE:
2112                 lat = &unit->latencies.write;
2113                 break;
2114         case FSF_DATADIR_CMND:
2115                 lat = &unit->latencies.cmd;
2116                 break;
2117         default:
2118                 return;
2119         }
2120
2121         spin_lock(&unit->latencies.lock);
2122         zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2123         zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2124         lat->counter++;
2125         spin_unlock(&unit->latencies.lock);
2126 }
2127
2128 #ifdef CONFIG_BLK_DEV_IO_TRACE
2129 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2130 {
2131         struct fsf_qual_latency_info *lat_inf;
2132         struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2133         struct request *req = scsi_cmnd->request;
2134         struct zfcp_blk_drv_data trace;
2135         int ticks = fsf_req->adapter->timer_ticks;
2136
2137         trace.flags = 0;
2138         trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2139         if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2140                 trace.flags |= ZFCP_BLK_LAT_VALID;
2141                 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2142                 trace.channel_lat = lat_inf->channel_lat * ticks;
2143                 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2144         }
2145         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2146                 trace.flags |= ZFCP_BLK_REQ_ERROR;
2147         trace.inb_usage = fsf_req->queue_req.qdio_inb_usage;
2148         trace.outb_usage = fsf_req->queue_req.qdio_outb_usage;
2149
2150         blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2151 }
2152 #else
2153 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2154 {
2155 }
2156 #endif
2157
2158 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2159 {
2160         struct scsi_cmnd *scpnt;
2161         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2162             &(req->qtcb->bottom.io.fcp_rsp);
2163         u32 sns_len;
2164         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2165         unsigned long flags;
2166
2167         read_lock_irqsave(&req->adapter->abort_lock, flags);
2168
2169         scpnt = req->data;
2170         if (unlikely(!scpnt)) {
2171                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2172                 return;
2173         }
2174
2175         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2176                 set_host_byte(scpnt, DID_SOFT_ERROR);
2177                 goto skip_fsfstatus;
2178         }
2179
2180         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2181                 set_host_byte(scpnt, DID_ERROR);
2182                 goto skip_fsfstatus;
2183         }
2184
2185         set_msg_byte(scpnt, COMMAND_COMPLETE);
2186
2187         scpnt->result |= fcp_rsp_iu->scsi_status;
2188
2189         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2190                 zfcp_fsf_req_latency(req);
2191
2192         zfcp_fsf_trace_latency(req);
2193
2194         if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2195                 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2196                         set_host_byte(scpnt, DID_OK);
2197                 else {
2198                         set_host_byte(scpnt, DID_ERROR);
2199                         goto skip_fsfstatus;
2200                 }
2201         }
2202
2203         if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2204                 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2205                           fcp_rsp_iu->fcp_rsp_len;
2206                 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2207                 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2208
2209                 memcpy(scpnt->sense_buffer,
2210                        zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2211         }
2212
2213         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2214                 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2215                 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2216                     scpnt->underflow)
2217                         set_host_byte(scpnt, DID_ERROR);
2218         }
2219 skip_fsfstatus:
2220         if (scpnt->result != 0)
2221                 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2222         else if (scpnt->retries > 0)
2223                 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2224         else
2225                 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2226
2227         scpnt->host_scribble = NULL;
2228         (scpnt->scsi_done) (scpnt);
2229         /*
2230          * We must hold this lock until scsi_done has been called.
2231          * Otherwise we may call scsi_done after abort regarding this
2232          * command has completed.
2233          * Note: scsi_done must not block!
2234          */
2235         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2236 }
2237
2238 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2239 {
2240         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2241             &(req->qtcb->bottom.io.fcp_rsp);
2242         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2243
2244         if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2245              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2246                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2247 }
2248
2249
2250 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2251 {
2252         struct zfcp_unit *unit;
2253         struct fsf_qtcb_header *header = &req->qtcb->header;
2254
2255         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2256                 unit = req->data;
2257         else
2258                 unit = req->unit;
2259
2260         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2261                 goto skip_fsfstatus;
2262
2263         switch (header->fsf_status) {
2264         case FSF_HANDLE_MISMATCH:
2265         case FSF_PORT_HANDLE_NOT_VALID:
2266                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2267                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2268                 break;
2269         case FSF_FCPLUN_NOT_VALID:
2270         case FSF_LUN_HANDLE_NOT_VALID:
2271                 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2272                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2273                 break;
2274         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2275                 zfcp_fsf_class_not_supp(req);
2276                 break;
2277         case FSF_ACCESS_DENIED:
2278                 zfcp_fsf_access_denied_unit(req, unit);
2279                 break;
2280         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2281                 dev_err(&req->adapter->ccw_device->dev,
2282                         "Incorrect direction %d, unit 0x%016Lx on port "
2283                         "0x%016Lx closed\n",
2284                         req->qtcb->bottom.io.data_direction,
2285                         (unsigned long long)unit->fcp_lun,
2286                         (unsigned long long)unit->port->wwpn);
2287                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2288                                           req);
2289                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2290                 break;
2291         case FSF_CMND_LENGTH_NOT_VALID:
2292                 dev_err(&req->adapter->ccw_device->dev,
2293                         "Incorrect CDB length %d, unit 0x%016Lx on "
2294                         "port 0x%016Lx closed\n",
2295                         req->qtcb->bottom.io.fcp_cmnd_length,
2296                         (unsigned long long)unit->fcp_lun,
2297                         (unsigned long long)unit->port->wwpn);
2298                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2299                                           req);
2300                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2301                 break;
2302         case FSF_PORT_BOXED:
2303                 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2304                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2305                                ZFCP_STATUS_FSFREQ_RETRY;
2306                 break;
2307         case FSF_LUN_BOXED:
2308                 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2309                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2310                                ZFCP_STATUS_FSFREQ_RETRY;
2311                 break;
2312         case FSF_ADAPTER_STATUS_AVAILABLE:
2313                 if (header->fsf_status_qual.word[0] ==
2314                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2315                         zfcp_test_link(unit->port);
2316                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2317                 break;
2318         }
2319 skip_fsfstatus:
2320         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2321                 zfcp_fsf_send_fcp_ctm_handler(req);
2322         else {
2323                 zfcp_fsf_send_fcp_command_task_handler(req);
2324                 req->unit = NULL;
2325                 zfcp_unit_put(unit);
2326         }
2327 }
2328
2329 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2330 {
2331         u32 *fcp_dl_ptr;
2332
2333         /*
2334          * fcp_dl_addr = start address of fcp_cmnd structure +
2335          * size of fixed part + size of dynamically sized add_dcp_cdb field
2336          * SEE FCP-2 documentation
2337          */
2338         fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2339                         (fcp_cmd->add_fcp_cdb_length << 2));
2340         *fcp_dl_ptr = fcp_dl;
2341 }
2342
2343 /**
2344  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2345  * @unit: unit where command is sent to
2346  * @scsi_cmnd: scsi command to be sent
2347  */
2348 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2349                                    struct scsi_cmnd *scsi_cmnd)
2350 {
2351         struct zfcp_fsf_req *req;
2352         struct fcp_cmnd_iu *fcp_cmnd_iu;
2353         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2354         int real_bytes, retval = -EIO;
2355         struct zfcp_adapter *adapter = unit->port->adapter;
2356
2357         if (unlikely(!(atomic_read(&unit->status) &
2358                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2359                 return -EBUSY;
2360
2361         spin_lock(&adapter->req_q_lock);
2362         if (atomic_read(&adapter->req_q.count) <= 0) {
2363                 atomic_inc(&adapter->qdio_outb_full);
2364                 goto out;
2365         }
2366
2367         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2368                                   adapter->pool.scsi_req);
2369
2370         if (IS_ERR(req)) {
2371                 retval = PTR_ERR(req);
2372                 goto out;
2373         }
2374
2375         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2376         zfcp_unit_get(unit);
2377         req->unit = unit;
2378         req->data = scsi_cmnd;
2379         req->handler = zfcp_fsf_send_fcp_command_handler;
2380         req->qtcb->header.lun_handle = unit->handle;
2381         req->qtcb->header.port_handle = unit->port->handle;
2382         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2383
2384         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2385
2386         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2387         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2388         /*
2389          * set depending on data direction:
2390          *      data direction bits in SBALE (SB Type)
2391          *      data direction bits in QTCB
2392          *      data direction bits in FCP_CMND IU
2393          */
2394         switch (scsi_cmnd->sc_data_direction) {
2395         case DMA_NONE:
2396                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2397                 break;
2398         case DMA_FROM_DEVICE:
2399                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2400                 fcp_cmnd_iu->rddata = 1;
2401                 break;
2402         case DMA_TO_DEVICE:
2403                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2404                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2405                 fcp_cmnd_iu->wddata = 1;
2406                 break;
2407         case DMA_BIDIRECTIONAL:
2408                 goto failed_scsi_cmnd;
2409         }
2410
2411         if (likely((scsi_cmnd->device->simple_tags) ||
2412                    ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2413                     (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2414                 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2415         else
2416                 fcp_cmnd_iu->task_attribute = UNTAGGED;
2417
2418         if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2419                 fcp_cmnd_iu->add_fcp_cdb_length =
2420                         (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2421
2422         memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2423
2424         req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2425                 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2426
2427         real_bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req, sbtype,
2428                                              scsi_sglist(scsi_cmnd),
2429                                              FSF_MAX_SBALS_PER_REQ);
2430         if (unlikely(real_bytes < 0)) {
2431                 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2432                         dev_err(&adapter->ccw_device->dev,
2433                                 "Oversize data package, unit 0x%016Lx "
2434                                 "on port 0x%016Lx closed\n",
2435                                 (unsigned long long)unit->fcp_lun,
2436                                 (unsigned long long)unit->port->wwpn);
2437                         zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2438                         retval = -EINVAL;
2439                 }
2440                 goto failed_scsi_cmnd;
2441         }
2442
2443         zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2444
2445         retval = zfcp_fsf_req_send(req);
2446         if (unlikely(retval))
2447                 goto failed_scsi_cmnd;
2448
2449         goto out;
2450
2451 failed_scsi_cmnd:
2452         zfcp_unit_put(unit);
2453         zfcp_fsf_req_free(req);
2454         scsi_cmnd->host_scribble = NULL;
2455 out:
2456         spin_unlock(&adapter->req_q_lock);
2457         return retval;
2458 }
2459
2460 /**
2461  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2462  * @unit: pointer to struct zfcp_unit
2463  * @tm_flags: unsigned byte for task management flags
2464  * Returns: on success pointer to struct fsf_req, NULL otherwise
2465  */
2466 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2467 {
2468         struct qdio_buffer_element *sbale;
2469         struct zfcp_fsf_req *req = NULL;
2470         struct fcp_cmnd_iu *fcp_cmnd_iu;
2471         struct zfcp_adapter *adapter = unit->port->adapter;
2472
2473         if (unlikely(!(atomic_read(&unit->status) &
2474                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2475                 return NULL;
2476
2477         spin_lock_bh(&adapter->req_q_lock);
2478         if (zfcp_fsf_req_sbal_get(adapter))
2479                 goto out;
2480
2481         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2482                                   adapter->pool.scsi_req);
2483
2484         if (IS_ERR(req)) {
2485                 req = NULL;
2486                 goto out;
2487         }
2488
2489         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2490         req->data = unit;
2491         req->handler = zfcp_fsf_send_fcp_command_handler;
2492         req->qtcb->header.lun_handle = unit->handle;
2493         req->qtcb->header.port_handle = unit->port->handle;
2494         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2495         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2496         req->qtcb->bottom.io.fcp_cmnd_length =  sizeof(struct fcp_cmnd_iu) +
2497                                                 sizeof(u32);
2498
2499         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
2500         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2501         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2502
2503         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2504         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2505         fcp_cmnd_iu->task_management_flags = tm_flags;
2506
2507         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2508         if (!zfcp_fsf_req_send(req))
2509                 goto out;
2510
2511         zfcp_fsf_req_free(req);
2512         req = NULL;
2513 out:
2514         spin_unlock_bh(&adapter->req_q_lock);
2515         return req;
2516 }
2517
2518 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2519 {
2520 }
2521
2522 /**
2523  * zfcp_fsf_control_file - control file upload/download
2524  * @adapter: pointer to struct zfcp_adapter
2525  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2526  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2527  */
2528 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2529                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2530 {
2531         struct qdio_buffer_element *sbale;
2532         struct zfcp_fsf_req *req = NULL;
2533         struct fsf_qtcb_bottom_support *bottom;
2534         int direction, retval = -EIO, bytes;
2535
2536         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2537                 return ERR_PTR(-EOPNOTSUPP);
2538
2539         switch (fsf_cfdc->command) {
2540         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2541                 direction = SBAL_FLAGS0_TYPE_WRITE;
2542                 break;
2543         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2544                 direction = SBAL_FLAGS0_TYPE_READ;
2545                 break;
2546         default:
2547                 return ERR_PTR(-EINVAL);
2548         }
2549
2550         spin_lock_bh(&adapter->req_q_lock);
2551         if (zfcp_fsf_req_sbal_get(adapter))
2552                 goto out;
2553
2554         req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, NULL);
2555         if (IS_ERR(req)) {
2556                 retval = -EPERM;
2557                 goto out;
2558         }
2559
2560         req->handler = zfcp_fsf_control_file_handler;
2561
2562         sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
2563         sbale[0].flags |= direction;
2564
2565         bottom = &req->qtcb->bottom.support;
2566         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2567         bottom->option = fsf_cfdc->option;
2568
2569         bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req, direction,
2570                                         fsf_cfdc->sg, FSF_MAX_SBALS_PER_REQ);
2571         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2572                 zfcp_fsf_req_free(req);
2573                 goto out;
2574         }
2575
2576         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2577         retval = zfcp_fsf_req_send(req);
2578 out:
2579         spin_unlock_bh(&adapter->req_q_lock);
2580
2581         if (!retval) {
2582                 wait_for_completion(&req->completion);
2583                 return req;
2584         }
2585         return ERR_PTR(retval);
2586 }
2587
2588 /**
2589  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2590  * @adapter: pointer to struct zfcp_adapter
2591  * @sbal_idx: response queue index of SBAL to be processed
2592  */
2593 void zfcp_fsf_reqid_check(struct zfcp_adapter *adapter, int sbal_idx)
2594 {
2595         struct qdio_buffer *sbal = adapter->resp_q.sbal[sbal_idx];
2596         struct qdio_buffer_element *sbale;
2597         struct zfcp_fsf_req *fsf_req;
2598         unsigned long flags, req_id;
2599         int idx;
2600
2601         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2602
2603                 sbale = &sbal->element[idx];
2604                 req_id = (unsigned long) sbale->addr;
2605                 spin_lock_irqsave(&adapter->req_list_lock, flags);
2606                 fsf_req = zfcp_reqlist_find(adapter, req_id);
2607
2608                 if (!fsf_req)
2609                         /*
2610                          * Unknown request means that we have potentially memory
2611                          * corruption and must stop the machine immediately.
2612                          */
2613                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2614                               req_id, dev_name(&adapter->ccw_device->dev));
2615
2616                 list_del(&fsf_req->list);
2617                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2618
2619                 fsf_req->queue_req.sbal_response = sbal_idx;
2620                 fsf_req->queue_req.qdio_inb_usage =
2621                         atomic_read(&adapter->resp_q.count);
2622                 zfcp_fsf_req_complete(fsf_req);
2623
2624                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2625                         break;
2626         }
2627 }