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(zfcp_data.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->sbal_number = 1;
 724         req->sbal_first = req_q->first;
 725         req->sbal_last = req_q->first;
 726         req->sbale_curr = 1;
 727
 728         sbale = zfcp_qdio_sbale_req(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->qdio_outb_usage = atomic_read(&adapter->req_q.count);
 778         req->issued = get_clock();
 779         if (zfcp_qdio_send(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(req);
 823         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 824         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(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(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 qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1027         u32 feat = req->adapter->adapter_features;
1028         int bytes;
1029
1030         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1031                 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1032                         return -EOPNOTSUPP;
1033
1034                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1035                 return 0;
1036         }
1037
1038         /* use single, unchained SBAL if it can hold the request */
1039         if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1040                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1041                 return 0;
1042         }
1043
1044         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1045                                         sg_req, max_sbals);
1046         if (bytes <= 0)
1047                 return -EIO;
1048         req->qtcb->bottom.support.req_buf_length = bytes;
1049         req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1050
1051         bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1052                                         sg_resp, max_sbals);
1053         if (bytes <= 0)
1054                 return -EIO;
1055         req->qtcb->bottom.support.resp_buf_length = bytes;
1056
1057         return 0;
1058 }
1059
1060 /**
1061  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1062  * @ct: pointer to struct zfcp_send_ct with data for request
1063  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1064  * @erp_action: if non-null the Generic Service request sent within ERP
1065  */
1066 int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1067                      struct zfcp_erp_action *erp_action)
1068 {
1069         struct zfcp_wka_port *wka_port = ct->wka_port;
1070         struct zfcp_adapter *adapter = wka_port->adapter;
1071         struct zfcp_fsf_req *req;
1072         int ret = -EIO;
1073
1074         spin_lock_bh(&adapter->req_q_lock);
1075         if (zfcp_fsf_req_sbal_get(adapter))
1076                 goto out;
1077
1078         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, pool);
1079
1080         if (IS_ERR(req)) {
1081                 ret = PTR_ERR(req);
1082                 goto out;
1083         }
1084
1085         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1086         ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1087                                           FSF_MAX_SBALS_PER_REQ);
1088         if (ret)
1089                 goto failed_send;
1090
1091         req->handler = zfcp_fsf_send_ct_handler;
1092         req->qtcb->header.port_handle = wka_port->handle;
1093         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1094         req->qtcb->bottom.support.timeout = ct->timeout;
1095         req->data = ct;
1096
1097         zfcp_san_dbf_event_ct_request(req);
1098
1099         if (erp_action) {
1100                 erp_action->fsf_req = req;
1101                 req->erp_action = erp_action;
1102                 zfcp_fsf_start_erp_timer(req);
1103         } else
1104                 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1105
1106         ret = zfcp_fsf_req_send(req);
1107         if (ret)
1108                 goto failed_send;
1109
1110         goto out;
1111
1112 failed_send:
1113         zfcp_fsf_req_free(req);
1114         if (erp_action)
1115                 erp_action->fsf_req = NULL;
1116 out:
1117         spin_unlock_bh(&adapter->req_q_lock);
1118         return ret;
1119 }
1120
1121 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1122 {
1123         struct zfcp_send_els *send_els = req->data;
1124         struct zfcp_port *port = send_els->port;
1125         struct fsf_qtcb_header *header = &req->qtcb->header;
1126
1127         send_els->status = -EINVAL;
1128
1129         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1130                 goto skip_fsfstatus;
1131
1132         switch (header->fsf_status) {
1133         case FSF_GOOD:
1134                 zfcp_san_dbf_event_els_response(req);
1135                 send_els->status = 0;
1136                 break;
1137         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1138                 zfcp_fsf_class_not_supp(req);
1139                 break;
1140         case FSF_ADAPTER_STATUS_AVAILABLE:
1141                 switch (header->fsf_status_qual.word[0]){
1142                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1143                         if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1144                                 zfcp_test_link(port);
1145                         /*fall through */
1146                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1147                 case FSF_SQ_RETRY_IF_POSSIBLE:
1148                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1149                         break;
1150                 }
1151                 break;
1152         case FSF_ELS_COMMAND_REJECTED:
1153         case FSF_PAYLOAD_SIZE_MISMATCH:
1154         case FSF_REQUEST_SIZE_TOO_LARGE:
1155         case FSF_RESPONSE_SIZE_TOO_LARGE:
1156                 break;
1157         case FSF_ACCESS_DENIED:
1158                 if (port)
1159                         zfcp_fsf_access_denied_port(req, port);
1160                 break;
1161         case FSF_SBAL_MISMATCH:
1162                 /* should never occure, avoided in zfcp_fsf_send_els */
1163                 /* fall through */
1164         default:
1165                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1166                 break;
1167         }
1168 skip_fsfstatus:
1169         if (send_els->handler)
1170                 send_els->handler(send_els->handler_data);
1171 }
1172
1173 /**
1174  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1175  * @els: pointer to struct zfcp_send_els with data for the command
1176  */
1177 int zfcp_fsf_send_els(struct zfcp_send_els *els)
1178 {
1179         struct zfcp_fsf_req *req;
1180         struct zfcp_adapter *adapter = els->adapter;
1181         struct fsf_qtcb_bottom_support *bottom;
1182         int ret = -EIO;
1183
1184         spin_lock_bh(&adapter->req_q_lock);
1185         if (zfcp_fsf_req_sbal_get(adapter))
1186                 goto out;
1187
1188         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, NULL);
1189
1190         if (IS_ERR(req)) {
1191                 ret = PTR_ERR(req);
1192                 goto out;
1193         }
1194
1195         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1196         ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
1197
1198         if (ret)
1199                 goto failed_send;
1200
1201         bottom = &req->qtcb->bottom.support;
1202         req->handler = zfcp_fsf_send_els_handler;
1203         bottom->d_id = els->d_id;
1204         bottom->service_class = FSF_CLASS_3;
1205         bottom->timeout = 2 * R_A_TOV;
1206         req->data = els;
1207
1208         zfcp_san_dbf_event_els_request(req);
1209
1210         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1211         ret = zfcp_fsf_req_send(req);
1212         if (ret)
1213                 goto failed_send;
1214
1215         goto out;
1216
1217 failed_send:
1218         zfcp_fsf_req_free(req);
1219 out:
1220         spin_unlock_bh(&adapter->req_q_lock);
1221         return ret;
1222 }
1223
1224 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1225 {
1226         struct qdio_buffer_element *sbale;
1227         struct zfcp_fsf_req *req;
1228         struct zfcp_adapter *adapter = erp_action->adapter;
1229         int retval = -EIO;
1230
1231         spin_lock_bh(&adapter->req_q_lock);
1232         if (zfcp_fsf_req_sbal_get(adapter))
1233                 goto out;
1234
1235         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1236                                   adapter->pool.erp_req);
1237
1238         if (IS_ERR(req)) {
1239                 retval = PTR_ERR(req);
1240                 goto out;
1241         }
1242
1243         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1244         sbale = zfcp_qdio_sbale_req(req);
1245         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1246         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1247
1248         req->qtcb->bottom.config.feature_selection =
1249                         FSF_FEATURE_CFDC |
1250                         FSF_FEATURE_LUN_SHARING |
1251                         FSF_FEATURE_NOTIFICATION_LOST |
1252                         FSF_FEATURE_UPDATE_ALERT;
1253         req->erp_action = erp_action;
1254         req->handler = zfcp_fsf_exchange_config_data_handler;
1255         erp_action->fsf_req = req;
1256
1257         zfcp_fsf_start_erp_timer(req);
1258         retval = zfcp_fsf_req_send(req);
1259         if (retval) {
1260                 zfcp_fsf_req_free(req);
1261                 erp_action->fsf_req = NULL;
1262         }
1263 out:
1264         spin_unlock_bh(&adapter->req_q_lock);
1265         return retval;
1266 }
1267
1268 int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1269                                        struct fsf_qtcb_bottom_config *data)
1270 {
1271         struct qdio_buffer_element *sbale;
1272         struct zfcp_fsf_req *req = NULL;
1273         int retval = -EIO;
1274
1275         spin_lock_bh(&adapter->req_q_lock);
1276         if (zfcp_fsf_req_sbal_get(adapter))
1277                 goto out_unlock;
1278
1279         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1280
1281         if (IS_ERR(req)) {
1282                 retval = PTR_ERR(req);
1283                 goto out_unlock;
1284         }
1285
1286         sbale = zfcp_qdio_sbale_req(req);
1287         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1288         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1289         req->handler = zfcp_fsf_exchange_config_data_handler;
1290
1291         req->qtcb->bottom.config.feature_selection =
1292                         FSF_FEATURE_CFDC |
1293                         FSF_FEATURE_LUN_SHARING |
1294                         FSF_FEATURE_NOTIFICATION_LOST |
1295                         FSF_FEATURE_UPDATE_ALERT;
1296
1297         if (data)
1298                 req->data = data;
1299
1300         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1301         retval = zfcp_fsf_req_send(req);
1302         spin_unlock_bh(&adapter->req_q_lock);
1303         if (!retval)
1304                 wait_for_completion(&req->completion);
1305
1306         zfcp_fsf_req_free(req);
1307         return retval;
1308
1309 out_unlock:
1310         spin_unlock_bh(&adapter->req_q_lock);
1311         return retval;
1312 }
1313
1314 /**
1315  * zfcp_fsf_exchange_port_data - request information about local port
1316  * @erp_action: ERP action for the adapter for which port data is requested
1317  * Returns: 0 on success, error otherwise
1318  */
1319 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1320 {
1321         struct qdio_buffer_element *sbale;
1322         struct zfcp_fsf_req *req;
1323         struct zfcp_adapter *adapter = erp_action->adapter;
1324         int retval = -EIO;
1325
1326         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1327                 return -EOPNOTSUPP;
1328
1329         spin_lock_bh(&adapter->req_q_lock);
1330         if (zfcp_fsf_req_sbal_get(adapter))
1331                 goto out;
1332
1333         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1334                                   adapter->pool.erp_req);
1335
1336         if (IS_ERR(req)) {
1337                 retval = PTR_ERR(req);
1338                 goto out;
1339         }
1340
1341         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1342         sbale = zfcp_qdio_sbale_req(req);
1343         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1344         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1345
1346         req->handler = zfcp_fsf_exchange_port_data_handler;
1347         req->erp_action = erp_action;
1348         erp_action->fsf_req = req;
1349
1350         zfcp_fsf_start_erp_timer(req);
1351         retval = zfcp_fsf_req_send(req);
1352         if (retval) {
1353                 zfcp_fsf_req_free(req);
1354                 erp_action->fsf_req = NULL;
1355         }
1356 out:
1357         spin_unlock_bh(&adapter->req_q_lock);
1358         return retval;
1359 }
1360
1361 /**
1362  * zfcp_fsf_exchange_port_data_sync - request information about local port
1363  * @adapter: pointer to struct zfcp_adapter
1364  * @data: pointer to struct fsf_qtcb_bottom_port
1365  * Returns: 0 on success, error otherwise
1366  */
1367 int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1368                                      struct fsf_qtcb_bottom_port *data)
1369 {
1370         struct qdio_buffer_element *sbale;
1371         struct zfcp_fsf_req *req = NULL;
1372         int retval = -EIO;
1373
1374         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1375                 return -EOPNOTSUPP;
1376
1377         spin_lock_bh(&adapter->req_q_lock);
1378         if (zfcp_fsf_req_sbal_get(adapter))
1379                 goto out_unlock;
1380
1381         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1382
1383         if (IS_ERR(req)) {
1384                 retval = PTR_ERR(req);
1385                 goto out_unlock;
1386         }
1387
1388         if (data)
1389                 req->data = data;
1390
1391         sbale = zfcp_qdio_sbale_req(req);
1392         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1393         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1394
1395         req->handler = zfcp_fsf_exchange_port_data_handler;
1396         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1397         retval = zfcp_fsf_req_send(req);
1398         spin_unlock_bh(&adapter->req_q_lock);
1399
1400         if (!retval)
1401                 wait_for_completion(&req->completion);
1402
1403         zfcp_fsf_req_free(req);
1404
1405         return retval;
1406
1407 out_unlock:
1408         spin_unlock_bh(&adapter->req_q_lock);
1409         return retval;
1410 }
1411
1412 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1413 {
1414         struct zfcp_port *port = req->data;
1415         struct fsf_qtcb_header *header = &req->qtcb->header;
1416         struct fsf_plogi *plogi;
1417
1418         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1419                 goto out;
1420
1421         switch (header->fsf_status) {
1422         case FSF_PORT_ALREADY_OPEN:
1423                 break;
1424         case FSF_ACCESS_DENIED:
1425                 zfcp_fsf_access_denied_port(req, port);
1426                 break;
1427         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1428                 dev_warn(&req->adapter->ccw_device->dev,
1429                          "Not enough FCP adapter resources to open "
1430                          "remote port 0x%016Lx\n",
1431                          (unsigned long long)port->wwpn);
1432                 zfcp_erp_port_failed(port, "fsoph_1", req);
1433                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1434                 break;
1435         case FSF_ADAPTER_STATUS_AVAILABLE:
1436                 switch (header->fsf_status_qual.word[0]) {
1437                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1438                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1439                 case FSF_SQ_NO_RETRY_POSSIBLE:
1440                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1441                         break;
1442                 }
1443                 break;
1444         case FSF_GOOD:
1445                 port->handle = header->port_handle;
1446                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1447                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1448                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1449                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1450                                   &port->status);
1451                 /* check whether D_ID has changed during open */
1452                 /*
1453                  * FIXME: This check is not airtight, as the FCP channel does
1454                  * not monitor closures of target port connections caused on
1455                  * the remote side. Thus, they might miss out on invalidating
1456                  * locally cached WWPNs (and other N_Port parameters) of gone
1457                  * target ports. So, our heroic attempt to make things safe
1458                  * could be undermined by 'open port' response data tagged with
1459                  * obsolete WWPNs. Another reason to monitor potential
1460                  * connection closures ourself at least (by interpreting
1461                  * incoming ELS' and unsolicited status). It just crosses my
1462                  * mind that one should be able to cross-check by means of
1463                  * another GID_PN straight after a port has been opened.
1464                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1465                  */
1466                 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1467                 if (req->qtcb->bottom.support.els1_length >=
1468                     FSF_PLOGI_MIN_LEN) {
1469                         if (plogi->serv_param.wwpn != port->wwpn)
1470                                 port->d_id = 0;
1471                         else {
1472                                 port->wwnn = plogi->serv_param.wwnn;
1473                                 zfcp_fc_plogi_evaluate(port, plogi);
1474                         }
1475                 }
1476                 break;
1477         case FSF_UNKNOWN_OP_SUBTYPE:
1478                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1479                 break;
1480         }
1481
1482 out:
1483         zfcp_port_put(port);
1484 }
1485
1486 /**
1487  * zfcp_fsf_open_port - create and send open port request
1488  * @erp_action: pointer to struct zfcp_erp_action
1489  * Returns: 0 on success, error otherwise
1490  */
1491 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1492 {
1493         struct qdio_buffer_element *sbale;
1494         struct zfcp_adapter *adapter = erp_action->adapter;
1495         struct zfcp_fsf_req *req;
1496         struct zfcp_port *port = erp_action->port;
1497         int retval = -EIO;
1498
1499         spin_lock_bh(&adapter->req_q_lock);
1500         if (zfcp_fsf_req_sbal_get(adapter))
1501                 goto out;
1502
1503         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
1504                                   adapter->pool.erp_req);
1505
1506         if (IS_ERR(req)) {
1507                 retval = PTR_ERR(req);
1508                 goto out;
1509         }
1510
1511         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1512         sbale = zfcp_qdio_sbale_req(req);
1513         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1514         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1515
1516         req->handler = zfcp_fsf_open_port_handler;
1517         req->qtcb->bottom.support.d_id = port->d_id;
1518         req->data = port;
1519         req->erp_action = erp_action;
1520         erp_action->fsf_req = req;
1521         zfcp_port_get(port);
1522
1523         zfcp_fsf_start_erp_timer(req);
1524         retval = zfcp_fsf_req_send(req);
1525         if (retval) {
1526                 zfcp_fsf_req_free(req);
1527                 erp_action->fsf_req = NULL;
1528                 zfcp_port_put(port);
1529         }
1530 out:
1531         spin_unlock_bh(&adapter->req_q_lock);
1532         return retval;
1533 }
1534
1535 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1536 {
1537         struct zfcp_port *port = req->data;
1538
1539         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1540                 return;
1541
1542         switch (req->qtcb->header.fsf_status) {
1543         case FSF_PORT_HANDLE_NOT_VALID:
1544                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1545                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1546                 break;
1547         case FSF_ADAPTER_STATUS_AVAILABLE:
1548                 break;
1549         case FSF_GOOD:
1550                 zfcp_erp_modify_port_status(port, "fscph_2", req,
1551                                             ZFCP_STATUS_COMMON_OPEN,
1552                                             ZFCP_CLEAR);
1553                 break;
1554         }
1555 }
1556
1557 /**
1558  * zfcp_fsf_close_port - create and send close port request
1559  * @erp_action: pointer to struct zfcp_erp_action
1560  * Returns: 0 on success, error otherwise
1561  */
1562 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1563 {
1564         struct qdio_buffer_element *sbale;
1565         struct zfcp_adapter *adapter = erp_action->adapter;
1566         struct zfcp_fsf_req *req;
1567         int retval = -EIO;
1568
1569         spin_lock_bh(&adapter->req_q_lock);
1570         if (zfcp_fsf_req_sbal_get(adapter))
1571                 goto out;
1572
1573         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1574                                   adapter->pool.erp_req);
1575
1576         if (IS_ERR(req)) {
1577                 retval = PTR_ERR(req);
1578                 goto out;
1579         }
1580
1581         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1582         sbale = zfcp_qdio_sbale_req(req);
1583         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1584         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1585
1586         req->handler = zfcp_fsf_close_port_handler;
1587         req->data = erp_action->port;
1588         req->erp_action = erp_action;
1589         req->qtcb->header.port_handle = erp_action->port->handle;
1590         erp_action->fsf_req = req;
1591
1592         zfcp_fsf_start_erp_timer(req);
1593         retval = zfcp_fsf_req_send(req);
1594         if (retval) {
1595                 zfcp_fsf_req_free(req);
1596                 erp_action->fsf_req = NULL;
1597         }
1598 out:
1599         spin_unlock_bh(&adapter->req_q_lock);
1600         return retval;
1601 }
1602
1603 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1604 {
1605         struct zfcp_wka_port *wka_port = req->data;
1606         struct fsf_qtcb_header *header = &req->qtcb->header;
1607
1608         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1609                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1610                 goto out;
1611         }
1612
1613         switch (header->fsf_status) {
1614         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1615                 dev_warn(&req->adapter->ccw_device->dev,
1616                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1617                 /* fall through */
1618         case FSF_ADAPTER_STATUS_AVAILABLE:
1619                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1620                 /* fall through */
1621         case FSF_ACCESS_DENIED:
1622                 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1623                 break;
1624         case FSF_GOOD:
1625                 wka_port->handle = header->port_handle;
1626                 /* fall through */
1627         case FSF_PORT_ALREADY_OPEN:
1628                 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1629         }
1630 out:
1631         wake_up(&wka_port->completion_wq);
1632 }
1633
1634 /**
1635  * zfcp_fsf_open_wka_port - create and send open wka-port request
1636  * @wka_port: pointer to struct zfcp_wka_port
1637  * Returns: 0 on success, error otherwise
1638  */
1639 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1640 {
1641         struct qdio_buffer_element *sbale;
1642         struct zfcp_adapter *adapter = wka_port->adapter;
1643         struct zfcp_fsf_req *req;
1644         int retval = -EIO;
1645
1646         spin_lock_bh(&adapter->req_q_lock);
1647         if (zfcp_fsf_req_sbal_get(adapter))
1648                 goto out;
1649
1650         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
1651                                   adapter->pool.erp_req);
1652
1653         if (unlikely(IS_ERR(req))) {
1654                 retval = PTR_ERR(req);
1655                 goto out;
1656         }
1657
1658         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1659         sbale = zfcp_qdio_sbale_req(req);
1660         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1661         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1662
1663         req->handler = zfcp_fsf_open_wka_port_handler;
1664         req->qtcb->bottom.support.d_id = wka_port->d_id;
1665         req->data = wka_port;
1666
1667         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1668         retval = zfcp_fsf_req_send(req);
1669         if (retval)
1670                 zfcp_fsf_req_free(req);
1671 out:
1672         spin_unlock_bh(&adapter->req_q_lock);
1673         return retval;
1674 }
1675
1676 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1677 {
1678         struct zfcp_wka_port *wka_port = req->data;
1679
1680         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1681                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1682                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1683         }
1684
1685         wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1686         wake_up(&wka_port->completion_wq);
1687 }
1688
1689 /**
1690  * zfcp_fsf_close_wka_port - create and send close wka port request
1691  * @erp_action: pointer to struct zfcp_erp_action
1692  * Returns: 0 on success, error otherwise
1693  */
1694 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1695 {
1696         struct qdio_buffer_element *sbale;
1697         struct zfcp_adapter *adapter = wka_port->adapter;
1698         struct zfcp_fsf_req *req;
1699         int retval = -EIO;
1700
1701         spin_lock_bh(&adapter->req_q_lock);
1702         if (zfcp_fsf_req_sbal_get(adapter))
1703                 goto out;
1704
1705         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1706                                   adapter->pool.erp_req);
1707
1708         if (unlikely(IS_ERR(req))) {
1709                 retval = PTR_ERR(req);
1710                 goto out;
1711         }
1712
1713         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1714         sbale = zfcp_qdio_sbale_req(req);
1715         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1716         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1717
1718         req->handler = zfcp_fsf_close_wka_port_handler;
1719         req->data = wka_port;
1720         req->qtcb->header.port_handle = wka_port->handle;
1721
1722         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1723         retval = zfcp_fsf_req_send(req);
1724         if (retval)
1725                 zfcp_fsf_req_free(req);
1726 out:
1727         spin_unlock_bh(&adapter->req_q_lock);
1728         return retval;
1729 }
1730
1731 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1732 {
1733         struct zfcp_port *port = req->data;
1734         struct fsf_qtcb_header *header = &req->qtcb->header;
1735         struct zfcp_unit *unit;
1736
1737         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1738                 return;
1739
1740         switch (header->fsf_status) {
1741         case FSF_PORT_HANDLE_NOT_VALID:
1742                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1743                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1744                 break;
1745         case FSF_ACCESS_DENIED:
1746                 zfcp_fsf_access_denied_port(req, port);
1747                 break;
1748         case FSF_PORT_BOXED:
1749                 /* can't use generic zfcp_erp_modify_port_status because
1750                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1751                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1752                 list_for_each_entry(unit, &port->unit_list_head, list)
1753                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1754                                           &unit->status);
1755                 zfcp_erp_port_boxed(port, "fscpph2", req);
1756                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1757                                ZFCP_STATUS_FSFREQ_RETRY;
1758
1759                 break;
1760         case FSF_ADAPTER_STATUS_AVAILABLE:
1761                 switch (header->fsf_status_qual.word[0]) {
1762                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1763                         /* fall through */
1764                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1765                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1766                         break;
1767                 }
1768                 break;
1769         case FSF_GOOD:
1770                 /* can't use generic zfcp_erp_modify_port_status because
1771                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1772                  */
1773                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1774                 list_for_each_entry(unit, &port->unit_list_head, list)
1775                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1776                                           &unit->status);
1777                 break;
1778         }
1779 }
1780
1781 /**
1782  * zfcp_fsf_close_physical_port - close physical port
1783  * @erp_action: pointer to struct zfcp_erp_action
1784  * Returns: 0 on success
1785  */
1786 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1787 {
1788         struct qdio_buffer_element *sbale;
1789         struct zfcp_adapter *adapter = erp_action->adapter;
1790         struct zfcp_fsf_req *req;
1791         int retval = -EIO;
1792
1793         spin_lock_bh(&adapter->req_q_lock);
1794         if (zfcp_fsf_req_sbal_get(adapter))
1795                 goto out;
1796
1797         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1798                                   adapter->pool.erp_req);
1799
1800         if (IS_ERR(req)) {
1801                 retval = PTR_ERR(req);
1802                 goto out;
1803         }
1804
1805         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1806         sbale = zfcp_qdio_sbale_req(req);
1807         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1808         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1809
1810         req->data = erp_action->port;
1811         req->qtcb->header.port_handle = erp_action->port->handle;
1812         req->erp_action = erp_action;
1813         req->handler = zfcp_fsf_close_physical_port_handler;
1814         erp_action->fsf_req = req;
1815
1816         zfcp_fsf_start_erp_timer(req);
1817         retval = zfcp_fsf_req_send(req);
1818         if (retval) {
1819                 zfcp_fsf_req_free(req);
1820                 erp_action->fsf_req = NULL;
1821         }
1822 out:
1823         spin_unlock_bh(&adapter->req_q_lock);
1824         return retval;
1825 }
1826
1827 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1828 {
1829         struct zfcp_adapter *adapter = req->adapter;
1830         struct zfcp_unit *unit = req->data;
1831         struct fsf_qtcb_header *header = &req->qtcb->header;
1832         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1833         struct fsf_queue_designator *queue_designator =
1834                                 &header->fsf_status_qual.fsf_queue_designator;
1835         int exclusive, readwrite;
1836
1837         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1838                 return;
1839
1840         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1841                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1842                           ZFCP_STATUS_UNIT_SHARED |
1843                           ZFCP_STATUS_UNIT_READONLY,
1844                           &unit->status);
1845
1846         switch (header->fsf_status) {
1847
1848         case FSF_PORT_HANDLE_NOT_VALID:
1849                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1850                 /* fall through */
1851         case FSF_LUN_ALREADY_OPEN:
1852                 break;
1853         case FSF_ACCESS_DENIED:
1854                 zfcp_fsf_access_denied_unit(req, unit);
1855                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1856                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1857                 break;
1858         case FSF_PORT_BOXED:
1859                 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1860                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1861                                ZFCP_STATUS_FSFREQ_RETRY;
1862                 break;
1863         case FSF_LUN_SHARING_VIOLATION:
1864                 if (header->fsf_status_qual.word[0])
1865                         dev_warn(&adapter->ccw_device->dev,
1866                                  "LUN 0x%Lx on port 0x%Lx is already in "
1867                                  "use by CSS%d, MIF Image ID %x\n",
1868                                  (unsigned long long)unit->fcp_lun,
1869                                  (unsigned long long)unit->port->wwpn,
1870                                  queue_designator->cssid,
1871                                  queue_designator->hla);
1872                 else
1873                         zfcp_act_eval_err(adapter,
1874                                           header->fsf_status_qual.word[2]);
1875                 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1876                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1877                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1878                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1879                 break;
1880         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1881                 dev_warn(&adapter->ccw_device->dev,
1882                          "No handle is available for LUN "
1883                          "0x%016Lx on port 0x%016Lx\n",
1884                          (unsigned long long)unit->fcp_lun,
1885                          (unsigned long long)unit->port->wwpn);
1886                 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1887                 /* fall through */
1888         case FSF_INVALID_COMMAND_OPTION:
1889                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1890                 break;
1891         case FSF_ADAPTER_STATUS_AVAILABLE:
1892                 switch (header->fsf_status_qual.word[0]) {
1893                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1894                         zfcp_test_link(unit->port);
1895                         /* fall through */
1896                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1897                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1898                         break;
1899                 }
1900                 break;
1901
1902         case FSF_GOOD:
1903                 unit->handle = header->lun_handle;
1904                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1905
1906                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1907                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1908                     !zfcp_ccw_priv_sch(adapter)) {
1909                         exclusive = (bottom->lun_access_info &
1910                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1911                         readwrite = (bottom->lun_access_info &
1912                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1913
1914                         if (!exclusive)
1915                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1916                                                 &unit->status);
1917
1918                         if (!readwrite) {
1919                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1920                                                 &unit->status);
1921                                 dev_info(&adapter->ccw_device->dev,
1922                                          "SCSI device at LUN 0x%016Lx on port "
1923                                          "0x%016Lx opened read-only\n",
1924                                          (unsigned long long)unit->fcp_lun,
1925                                          (unsigned long long)unit->port->wwpn);
1926                         }
1927
1928                         if (exclusive && !readwrite) {
1929                                 dev_err(&adapter->ccw_device->dev,
1930                                         "Exclusive read-only access not "
1931                                         "supported (unit 0x%016Lx, "
1932                                         "port 0x%016Lx)\n",
1933                                         (unsigned long long)unit->fcp_lun,
1934                                         (unsigned long long)unit->port->wwpn);
1935                                 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1936                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1937                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1938                         } else if (!exclusive && readwrite) {
1939                                 dev_err(&adapter->ccw_device->dev,
1940                                         "Shared read-write access not "
1941                                         "supported (unit 0x%016Lx, port "
1942                                         "0x%016Lx)\n",
1943                                         (unsigned long long)unit->fcp_lun,
1944                                         (unsigned long long)unit->port->wwpn);
1945                                 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1946                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1947                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1948                         }
1949                 }
1950                 break;
1951         }
1952 }
1953
1954 /**
1955  * zfcp_fsf_open_unit - open unit
1956  * @erp_action: pointer to struct zfcp_erp_action
1957  * Returns: 0 on success, error otherwise
1958  */
1959 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1960 {
1961         struct qdio_buffer_element *sbale;
1962         struct zfcp_adapter *adapter = erp_action->adapter;
1963         struct zfcp_fsf_req *req;
1964         int retval = -EIO;
1965
1966         spin_lock_bh(&adapter->req_q_lock);
1967         if (zfcp_fsf_req_sbal_get(adapter))
1968                 goto out;
1969
1970         req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1971                                   adapter->pool.erp_req);
1972
1973         if (IS_ERR(req)) {
1974                 retval = PTR_ERR(req);
1975                 goto out;
1976         }
1977
1978         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1979         sbale = zfcp_qdio_sbale_req(req);
1980         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1981         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1982
1983         req->qtcb->header.port_handle = erp_action->port->handle;
1984         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1985         req->handler = zfcp_fsf_open_unit_handler;
1986         req->data = erp_action->unit;
1987         req->erp_action = erp_action;
1988         erp_action->fsf_req = req;
1989
1990         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1991                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1992
1993         zfcp_fsf_start_erp_timer(req);
1994         retval = zfcp_fsf_req_send(req);
1995         if (retval) {
1996                 zfcp_fsf_req_free(req);
1997                 erp_action->fsf_req = NULL;
1998         }
1999 out:
2000         spin_unlock_bh(&adapter->req_q_lock);
2001         return retval;
2002 }
2003
2004 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2005 {
2006         struct zfcp_unit *unit = req->data;
2007
2008         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2009                 return;
2010
2011         switch (req->qtcb->header.fsf_status) {
2012         case FSF_PORT_HANDLE_NOT_VALID:
2013                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2014                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2015                 break;
2016         case FSF_LUN_HANDLE_NOT_VALID:
2017                 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2018                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2019                 break;
2020         case FSF_PORT_BOXED:
2021                 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2022                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2023                                ZFCP_STATUS_FSFREQ_RETRY;
2024                 break;
2025         case FSF_ADAPTER_STATUS_AVAILABLE:
2026                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2027                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2028                         zfcp_test_link(unit->port);
2029                         /* fall through */
2030                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2031                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2032                         break;
2033                 }
2034                 break;
2035         case FSF_GOOD:
2036                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2037                 break;
2038         }
2039 }
2040
2041 /**
2042  * zfcp_fsf_close_unit - close zfcp unit
2043  * @erp_action: pointer to struct zfcp_unit
2044  * Returns: 0 on success, error otherwise
2045  */
2046 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2047 {
2048         struct qdio_buffer_element *sbale;
2049         struct zfcp_adapter *adapter = erp_action->adapter;
2050         struct zfcp_fsf_req *req;
2051         int retval = -EIO;
2052
2053         spin_lock_bh(&adapter->req_q_lock);
2054         if (zfcp_fsf_req_sbal_get(adapter))
2055                 goto out;
2056
2057         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2058                                   adapter->pool.erp_req);
2059
2060         if (IS_ERR(req)) {
2061                 retval = PTR_ERR(req);
2062                 goto out;
2063         }
2064
2065         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2066         sbale = zfcp_qdio_sbale_req(req);
2067         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2068         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2069
2070         req->qtcb->header.port_handle = erp_action->port->handle;
2071         req->qtcb->header.lun_handle = erp_action->unit->handle;
2072         req->handler = zfcp_fsf_close_unit_handler;
2073         req->data = erp_action->unit;
2074         req->erp_action = erp_action;
2075         erp_action->fsf_req = req;
2076
2077         zfcp_fsf_start_erp_timer(req);
2078         retval = zfcp_fsf_req_send(req);
2079         if (retval) {
2080                 zfcp_fsf_req_free(req);
2081                 erp_action->fsf_req = NULL;
2082         }
2083 out:
2084         spin_unlock_bh(&adapter->req_q_lock);
2085         return retval;
2086 }
2087
2088 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2089 {
2090         lat_rec->sum += lat;
2091         lat_rec->min = min(lat_rec->min, lat);
2092         lat_rec->max = max(lat_rec->max, lat);
2093 }
2094
2095 static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
2096 {
2097         struct fsf_qual_latency_info *lat_inf;
2098         struct latency_cont *lat;
2099         struct zfcp_unit *unit = req->unit;
2100
2101         lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
2102
2103         switch (req->qtcb->bottom.io.data_direction) {
2104         case FSF_DATADIR_READ:
2105                 lat = &unit->latencies.read;
2106                 break;
2107         case FSF_DATADIR_WRITE:
2108                 lat = &unit->latencies.write;
2109                 break;
2110         case FSF_DATADIR_CMND:
2111                 lat = &unit->latencies.cmd;
2112                 break;
2113         default:
2114                 return;
2115         }
2116
2117         spin_lock(&unit->latencies.lock);
2118         zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2119         zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2120         lat->counter++;
2121         spin_unlock(&unit->latencies.lock);
2122 }
2123
2124 #ifdef CONFIG_BLK_DEV_IO_TRACE
2125 static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2126 {
2127         struct fsf_qual_latency_info *lat_inf;
2128         struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2129         struct request *req = scsi_cmnd->request;
2130         struct zfcp_blk_drv_data trace;
2131         int ticks = fsf_req->adapter->timer_ticks;
2132
2133         trace.flags = 0;
2134         trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2135         if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2136                 trace.flags |= ZFCP_BLK_LAT_VALID;
2137                 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2138                 trace.channel_lat = lat_inf->channel_lat * ticks;
2139                 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2140         }
2141         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2142                 trace.flags |= ZFCP_BLK_REQ_ERROR;
2143         trace.inb_usage = fsf_req->qdio_inb_usage;
2144         trace.outb_usage = fsf_req->qdio_outb_usage;
2145
2146         blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2147 }
2148 #else
2149 static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2150 {
2151 }
2152 #endif
2153
2154 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2155 {
2156         struct scsi_cmnd *scpnt;
2157         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2158             &(req->qtcb->bottom.io.fcp_rsp);
2159         u32 sns_len;
2160         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2161         unsigned long flags;
2162
2163         read_lock_irqsave(&req->adapter->abort_lock, flags);
2164
2165         scpnt = req->data;
2166         if (unlikely(!scpnt)) {
2167                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2168                 return;
2169         }
2170
2171         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2172                 set_host_byte(scpnt, DID_SOFT_ERROR);
2173                 goto skip_fsfstatus;
2174         }
2175
2176         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2177                 set_host_byte(scpnt, DID_ERROR);
2178                 goto skip_fsfstatus;
2179         }
2180
2181         set_msg_byte(scpnt, COMMAND_COMPLETE);
2182
2183         scpnt->result |= fcp_rsp_iu->scsi_status;
2184
2185         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2186                 zfcp_fsf_req_latency(req);
2187
2188         zfcp_fsf_trace_latency(req);
2189
2190         if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
2191                 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
2192                         set_host_byte(scpnt, DID_OK);
2193                 else {
2194                         set_host_byte(scpnt, DID_ERROR);
2195                         goto skip_fsfstatus;
2196                 }
2197         }
2198
2199         if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
2200                 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2201                           fcp_rsp_iu->fcp_rsp_len;
2202                 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
2203                 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
2204
2205                 memcpy(scpnt->sense_buffer,
2206                        zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
2207         }
2208
2209         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
2210                 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2211                 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2212                     scpnt->underflow)
2213                         set_host_byte(scpnt, DID_ERROR);
2214         }
2215 skip_fsfstatus:
2216         if (scpnt->result != 0)
2217                 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
2218         else if (scpnt->retries > 0)
2219                 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
2220         else
2221                 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
2222
2223         scpnt->host_scribble = NULL;
2224         (scpnt->scsi_done) (scpnt);
2225         /*
2226          * We must hold this lock until scsi_done has been called.
2227          * Otherwise we may call scsi_done after abort regarding this
2228          * command has completed.
2229          * Note: scsi_done must not block!
2230          */
2231         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2232 }
2233
2234 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2235 {
2236         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
2237             &(req->qtcb->bottom.io.fcp_rsp);
2238         char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
2239
2240         if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2241              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2242                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2243 }
2244
2245
2246 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2247 {
2248         struct zfcp_unit *unit;
2249         struct fsf_qtcb_header *header = &req->qtcb->header;
2250
2251         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2252                 unit = req->data;
2253         else
2254                 unit = req->unit;
2255
2256         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2257                 goto skip_fsfstatus;
2258
2259         switch (header->fsf_status) {
2260         case FSF_HANDLE_MISMATCH:
2261         case FSF_PORT_HANDLE_NOT_VALID:
2262                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2263                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2264                 break;
2265         case FSF_FCPLUN_NOT_VALID:
2266         case FSF_LUN_HANDLE_NOT_VALID:
2267                 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2268                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2269                 break;
2270         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2271                 zfcp_fsf_class_not_supp(req);
2272                 break;
2273         case FSF_ACCESS_DENIED:
2274                 zfcp_fsf_access_denied_unit(req, unit);
2275                 break;
2276         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2277                 dev_err(&req->adapter->ccw_device->dev,
2278                         "Incorrect direction %d, unit 0x%016Lx on port "
2279                         "0x%016Lx closed\n",
2280                         req->qtcb->bottom.io.data_direction,
2281                         (unsigned long long)unit->fcp_lun,
2282                         (unsigned long long)unit->port->wwpn);
2283                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2284                                           req);
2285                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2286                 break;
2287         case FSF_CMND_LENGTH_NOT_VALID:
2288                 dev_err(&req->adapter->ccw_device->dev,
2289                         "Incorrect CDB length %d, unit 0x%016Lx on "
2290                         "port 0x%016Lx closed\n",
2291                         req->qtcb->bottom.io.fcp_cmnd_length,
2292                         (unsigned long long)unit->fcp_lun,
2293                         (unsigned long long)unit->port->wwpn);
2294                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2295                                           req);
2296                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2297                 break;
2298         case FSF_PORT_BOXED:
2299                 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2300                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2301                                ZFCP_STATUS_FSFREQ_RETRY;
2302                 break;
2303         case FSF_LUN_BOXED:
2304                 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2305                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2306                                ZFCP_STATUS_FSFREQ_RETRY;
2307                 break;
2308         case FSF_ADAPTER_STATUS_AVAILABLE:
2309                 if (header->fsf_status_qual.word[0] ==
2310                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2311                         zfcp_test_link(unit->port);
2312                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2313                 break;
2314         }
2315 skip_fsfstatus:
2316         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2317                 zfcp_fsf_send_fcp_ctm_handler(req);
2318         else {
2319                 zfcp_fsf_send_fcp_command_task_handler(req);
2320                 req->unit = NULL;
2321                 zfcp_unit_put(unit);
2322         }
2323 }
2324
2325 static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2326 {
2327         u32 *fcp_dl_ptr;
2328
2329         /*
2330          * fcp_dl_addr = start address of fcp_cmnd structure +
2331          * size of fixed part + size of dynamically sized add_dcp_cdb field
2332          * SEE FCP-2 documentation
2333          */
2334         fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2335                         (fcp_cmd->add_fcp_cdb_length << 2));
2336         *fcp_dl_ptr = fcp_dl;
2337 }
2338
2339 /**
2340  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2341  * @unit: unit where command is sent to
2342  * @scsi_cmnd: scsi command to be sent
2343  */
2344 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2345                                    struct scsi_cmnd *scsi_cmnd)
2346 {
2347         struct zfcp_fsf_req *req;
2348         struct fcp_cmnd_iu *fcp_cmnd_iu;
2349         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2350         int real_bytes, retval = -EIO;
2351         struct zfcp_adapter *adapter = unit->port->adapter;
2352
2353         if (unlikely(!(atomic_read(&unit->status) &
2354                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2355                 return -EBUSY;
2356
2357         spin_lock(&adapter->req_q_lock);
2358         if (atomic_read(&adapter->req_q.count) <= 0) {
2359                 atomic_inc(&adapter->qdio_outb_full);
2360                 goto out;
2361         }
2362
2363         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2364                                   adapter->pool.scsi_req);
2365
2366         if (IS_ERR(req)) {
2367                 retval = PTR_ERR(req);
2368                 goto out;
2369         }
2370
2371         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2372         zfcp_unit_get(unit);
2373         req->unit = unit;
2374         req->data = scsi_cmnd;
2375         req->handler = zfcp_fsf_send_fcp_command_handler;
2376         req->qtcb->header.lun_handle = unit->handle;
2377         req->qtcb->header.port_handle = unit->port->handle;
2378         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2379
2380         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2381
2382         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2383         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2384         /*
2385          * set depending on data direction:
2386          *      data direction bits in SBALE (SB Type)
2387          *      data direction bits in QTCB
2388          *      data direction bits in FCP_CMND IU
2389          */
2390         switch (scsi_cmnd->sc_data_direction) {
2391         case DMA_NONE:
2392                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2393                 break;
2394         case DMA_FROM_DEVICE:
2395                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2396                 fcp_cmnd_iu->rddata = 1;
2397                 break;
2398         case DMA_TO_DEVICE:
2399                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2400                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2401                 fcp_cmnd_iu->wddata = 1;
2402                 break;
2403         case DMA_BIDIRECTIONAL:
2404                 goto failed_scsi_cmnd;
2405         }
2406
2407         if (likely((scsi_cmnd->device->simple_tags) ||
2408                    ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2409                     (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2410                 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2411         else
2412                 fcp_cmnd_iu->task_attribute = UNTAGGED;
2413
2414         if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2415                 fcp_cmnd_iu->add_fcp_cdb_length =
2416                         (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
2417
2418         memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2419
2420         req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
2421                 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
2422
2423         real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2424                                              scsi_sglist(scsi_cmnd),
2425                                              FSF_MAX_SBALS_PER_REQ);
2426         if (unlikely(real_bytes < 0)) {
2427                 if (req->sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2428                         dev_err(&adapter->ccw_device->dev,
2429                                 "Oversize data package, unit 0x%016Lx "
2430                                 "on port 0x%016Lx closed\n",
2431                                 (unsigned long long)unit->fcp_lun,
2432                                 (unsigned long long)unit->port->wwpn);
2433                         zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2434                         retval = -EINVAL;
2435                 }
2436                 goto failed_scsi_cmnd;
2437         }
2438
2439         zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2440
2441         retval = zfcp_fsf_req_send(req);
2442         if (unlikely(retval))
2443                 goto failed_scsi_cmnd;
2444
2445         goto out;
2446
2447 failed_scsi_cmnd:
2448         zfcp_unit_put(unit);
2449         zfcp_fsf_req_free(req);
2450         scsi_cmnd->host_scribble = NULL;
2451 out:
2452         spin_unlock(&adapter->req_q_lock);
2453         return retval;
2454 }
2455
2456 /**
2457  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2458  * @unit: pointer to struct zfcp_unit
2459  * @tm_flags: unsigned byte for task management flags
2460  * Returns: on success pointer to struct fsf_req, NULL otherwise
2461  */
2462 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2463 {
2464         struct qdio_buffer_element *sbale;
2465         struct zfcp_fsf_req *req = NULL;
2466         struct fcp_cmnd_iu *fcp_cmnd_iu;
2467         struct zfcp_adapter *adapter = unit->port->adapter;
2468
2469         if (unlikely(!(atomic_read(&unit->status) &
2470                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2471                 return NULL;
2472
2473         spin_lock_bh(&adapter->req_q_lock);
2474         if (zfcp_fsf_req_sbal_get(adapter))
2475                 goto out;
2476
2477         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2478                                   adapter->pool.scsi_req);
2479
2480         if (IS_ERR(req)) {
2481                 req = NULL;
2482                 goto out;
2483         }
2484
2485         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2486         req->data = unit;
2487         req->handler = zfcp_fsf_send_fcp_command_handler;
2488         req->qtcb->header.lun_handle = unit->handle;
2489         req->qtcb->header.port_handle = unit->port->handle;
2490         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2491         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2492         req->qtcb->bottom.io.fcp_cmnd_length =  sizeof(struct fcp_cmnd_iu) +
2493                                                 sizeof(u32);
2494
2495         sbale = zfcp_qdio_sbale_req(req);
2496         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2497         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2498
2499         fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2500         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2501         fcp_cmnd_iu->task_management_flags = tm_flags;
2502
2503         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2504         if (!zfcp_fsf_req_send(req))
2505                 goto out;
2506
2507         zfcp_fsf_req_free(req);
2508         req = NULL;
2509 out:
2510         spin_unlock_bh(&adapter->req_q_lock);
2511         return req;
2512 }
2513
2514 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2515 {
2516 }
2517
2518 /**
2519  * zfcp_fsf_control_file - control file upload/download
2520  * @adapter: pointer to struct zfcp_adapter
2521  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2522  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2523  */
2524 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2525                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2526 {
2527         struct qdio_buffer_element *sbale;
2528         struct zfcp_fsf_req *req = NULL;
2529         struct fsf_qtcb_bottom_support *bottom;
2530         int direction, retval = -EIO, bytes;
2531
2532         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2533                 return ERR_PTR(-EOPNOTSUPP);
2534
2535         switch (fsf_cfdc->command) {
2536         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2537                 direction = SBAL_FLAGS0_TYPE_WRITE;
2538                 break;
2539         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2540                 direction = SBAL_FLAGS0_TYPE_READ;
2541                 break;
2542         default:
2543                 return ERR_PTR(-EINVAL);
2544         }
2545
2546         spin_lock_bh(&adapter->req_q_lock);
2547         if (zfcp_fsf_req_sbal_get(adapter))
2548                 goto out;
2549
2550         req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, NULL);
2551         if (IS_ERR(req)) {
2552                 retval = -EPERM;
2553                 goto out;
2554         }
2555
2556         req->handler = zfcp_fsf_control_file_handler;
2557
2558         sbale = zfcp_qdio_sbale_req(req);
2559         sbale[0].flags |= direction;
2560
2561         bottom = &req->qtcb->bottom.support;
2562         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2563         bottom->option = fsf_cfdc->option;
2564
2565         bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2566                                         FSF_MAX_SBALS_PER_REQ);
2567         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2568                 zfcp_fsf_req_free(req);
2569                 goto out;
2570         }
2571
2572         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2573         retval = zfcp_fsf_req_send(req);
2574 out:
2575         spin_unlock_bh(&adapter->req_q_lock);
2576
2577         if (!retval) {
2578                 wait_for_completion(&req->completion);
2579                 return req;
2580         }
2581         return ERR_PTR(retval);
2582 }
2583
2584 /**
2585  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2586  * @adapter: pointer to struct zfcp_adapter
2587  * @sbal_idx: response queue index of SBAL to be processed
2588  */
2589 void zfcp_fsf_reqid_check(struct zfcp_adapter *adapter, int sbal_idx)
2590 {
2591         struct qdio_buffer *sbal = adapter->resp_q.sbal[sbal_idx];
2592         struct qdio_buffer_element *sbale;
2593         struct zfcp_fsf_req *fsf_req;
2594         unsigned long flags, req_id;
2595         int idx;
2596
2597         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2598
2599                 sbale = &sbal->element[idx];
2600                 req_id = (unsigned long) sbale->addr;
2601                 spin_lock_irqsave(&adapter->req_list_lock, flags);
2602                 fsf_req = zfcp_reqlist_find(adapter, req_id);
2603
2604                 if (!fsf_req)
2605                         /*
2606                          * Unknown request means that we have potentially memory
2607                          * corruption and must stop the machine immediately.
2608                          */
2609                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2610                               req_id, dev_name(&adapter->ccw_device->dev));
2611
2612                 list_del(&fsf_req->list);
2613                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2614
2615                 fsf_req->sbal_response = sbal_idx;
2616                 fsf_req->qdio_inb_usage = atomic_read(&adapter->resp_q.count);
2617                 zfcp_fsf_req_complete(fsf_req);
2618
2619                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2620                         break;
2621         }
2622 }