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

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2009
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <scsi/fc/fc_els.h>
  14 #include "zfcp_ext.h"
  15 #include "zfcp_fc.h"
  16 #include "zfcp_dbf.h"
  17
  18 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  19 {
  20         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  21         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  22                                 "fsrth_1", NULL);
  23 }
  24
  25 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  26                                  unsigned long timeout)
  27 {
  28         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  29         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  30         fsf_req->timer.expires = jiffies + timeout;
  31         add_timer(&fsf_req->timer);
  32 }
  33
  34 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  35 {
  36         BUG_ON(!fsf_req->erp_action);
  37         fsf_req->timer.function = zfcp_erp_timeout_handler;
  38         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  39         fsf_req->timer.expires = jiffies + 30 * HZ;
  40         add_timer(&fsf_req->timer);
  41 }
  42
  43 /* association between FSF command and FSF QTCB type */
  44 static u32 fsf_qtcb_type[] = {
  45         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  46         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  47         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  48         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  49         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  50         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  51         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  52         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  55         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  56         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  58 };
  59
  60 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
  61 {
  62         u16 subtable = table >> 16;
  63         u16 rule = table & 0xffff;
  64         const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
  65
  66         if (subtable && subtable < ARRAY_SIZE(act_type))
  67                 dev_warn(&adapter->ccw_device->dev,
  68                          "Access denied according to ACT rule type %s, "
  69                          "rule %d\n", act_type[subtable], rule);
  70 }
  71
  72 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
  73                                         struct zfcp_port *port)
  74 {
  75         struct fsf_qtcb_header *header = &req->qtcb->header;
  76         dev_warn(&req->adapter->ccw_device->dev,
  77                  "Access denied to port 0x%016Lx\n",
  78                  (unsigned long long)port->wwpn);
  79         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  80         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  81         zfcp_erp_port_access_denied(port, "fspad_1", req);
  82         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  83 }
  84
  85 static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
  86                                         struct zfcp_unit *unit)
  87 {
  88         struct fsf_qtcb_header *header = &req->qtcb->header;
  89         dev_warn(&req->adapter->ccw_device->dev,
  90                  "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
  91                  (unsigned long long)unit->fcp_lun,
  92                  (unsigned long long)unit->port->wwpn);
  93         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
  94         zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
  95         zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
  96         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  97 }
  98
  99 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
 100 {
 101         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
 102                 "operational because of an unsupported FC class\n");
 103         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
 104         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 105 }
 106
 107 /**
 108  * zfcp_fsf_req_free - free memory used by fsf request
 109  * @fsf_req: pointer to struct zfcp_fsf_req
 110  */
 111 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
 112 {
 113         if (likely(req->pool)) {
 114                 if (likely(req->qtcb))
 115                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
 116                 mempool_free(req, req->pool);
 117                 return;
 118         }
 119
 120         if (likely(req->qtcb))
 121                 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
 122         kfree(req);
 123 }
 124
 125 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 126 {
 127         unsigned long flags;
 128         struct fsf_status_read_buffer *sr_buf = req->data;
 129         struct zfcp_adapter *adapter = req->adapter;
 130         struct zfcp_port *port;
 131         int d_id = ntoh24(sr_buf->d_id);
 132
 133         read_lock_irqsave(&adapter->port_list_lock, flags);
 134         list_for_each_entry(port, &adapter->port_list, list)
 135                 if (port->d_id == d_id) {
 136                         zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
 137                         break;
 138                 }
 139         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 140 }
 141
 142 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
 143                                          struct fsf_link_down_info *link_down)
 144 {
 145         struct zfcp_adapter *adapter = req->adapter;
 146
 147         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 148                 return;
 149
 150         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 151
 152         zfcp_scsi_schedule_rports_block(adapter);
 153
 154         if (!link_down)
 155                 goto out;
 156
 157         switch (link_down->error_code) {
 158         case FSF_PSQ_LINK_NO_LIGHT:
 159                 dev_warn(&req->adapter->ccw_device->dev,
 160                          "There is no light signal from the local "
 161                          "fibre channel cable\n");
 162                 break;
 163         case FSF_PSQ_LINK_WRAP_PLUG:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "There is a wrap plug instead of a fibre "
 166                          "channel cable\n");
 167                 break;
 168         case FSF_PSQ_LINK_NO_FCP:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The adjacent fibre channel node does not "
 171                          "support FCP\n");
 172                 break;
 173         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The FCP device is suspended because of a "
 176                          "firmware update\n");
 177                 break;
 178         case FSF_PSQ_LINK_INVALID_WWPN:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "The FCP device detected a WWPN that is "
 181                          "duplicate or not valid\n");
 182                 break;
 183         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "The fibre channel fabric does not support NPIV\n");
 186                 break;
 187         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 188                 dev_warn(&req->adapter->ccw_device->dev,
 189                          "The FCP adapter cannot support more NPIV ports\n");
 190                 break;
 191         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 192                 dev_warn(&req->adapter->ccw_device->dev,
 193                          "The adjacent switch cannot support "
 194                          "more NPIV ports\n");
 195                 break;
 196         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 197                 dev_warn(&req->adapter->ccw_device->dev,
 198                          "The FCP adapter could not log in to the "
 199                          "fibre channel fabric\n");
 200                 break;
 201         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 202                 dev_warn(&req->adapter->ccw_device->dev,
 203                          "The WWPN assignment file on the FCP adapter "
 204                          "has been damaged\n");
 205                 break;
 206         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 207                 dev_warn(&req->adapter->ccw_device->dev,
 208                          "The mode table on the FCP adapter "
 209                          "has been damaged\n");
 210                 break;
 211         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 212                 dev_warn(&req->adapter->ccw_device->dev,
 213                          "All NPIV ports on the FCP adapter have "
 214                          "been assigned\n");
 215                 break;
 216         default:
 217                 dev_warn(&req->adapter->ccw_device->dev,
 218                          "The link between the FCP adapter and "
 219                          "the FC fabric is down\n");
 220         }
 221 out:
 222         zfcp_erp_adapter_failed(adapter, id, req);
 223 }
 224
 225 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 226 {
 227         struct fsf_status_read_buffer *sr_buf = req->data;
 228         struct fsf_link_down_info *ldi =
 229                 (struct fsf_link_down_info *) &sr_buf->payload;
 230
 231         switch (sr_buf->status_subtype) {
 232         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 233                 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
 234                 break;
 235         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 236                 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
 237                 break;
 238         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 239                 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
 240         };
 241 }
 242
 243 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 244 {
 245         struct zfcp_adapter *adapter = req->adapter;
 246         struct fsf_status_read_buffer *sr_buf = req->data;
 247
 248         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 249                 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
 250                 mempool_free(sr_buf, adapter->pool.status_read_data);
 251                 zfcp_fsf_req_free(req);
 252                 return;
 253         }
 254
 255         zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
 256
 257         switch (sr_buf->status_type) {
 258         case FSF_STATUS_READ_PORT_CLOSED:
 259                 zfcp_fsf_status_read_port_closed(req);
 260                 break;
 261         case FSF_STATUS_READ_INCOMING_ELS:
 262                 zfcp_fc_incoming_els(req);
 263                 break;
 264         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 265                 break;
 266         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 267                 dev_warn(&adapter->ccw_device->dev,
 268                          "The error threshold for checksum statistics "
 269                          "has been exceeded\n");
 270                 zfcp_dbf_hba_berr(adapter->dbf, req);
 271                 break;
 272         case FSF_STATUS_READ_LINK_DOWN:
 273                 zfcp_fsf_status_read_link_down(req);
 274                 break;
 275         case FSF_STATUS_READ_LINK_UP:
 276                 dev_info(&adapter->ccw_device->dev,
 277                          "The local link has been restored\n");
 278                 /* All ports should be marked as ready to run again */
 279                 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
 280                                                ZFCP_STATUS_COMMON_RUNNING,
 281                                                ZFCP_SET);
 282                 zfcp_erp_adapter_reopen(adapter,
 283                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 284                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 285                                         "fssrh_2", req);
 286                 break;
 287         case FSF_STATUS_READ_NOTIFICATION_LOST:
 288                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 289                         zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
 290                                                         req);
 291                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 292                         queue_work(adapter->work_queue, &adapter->scan_work);
 293                 break;
 294         case FSF_STATUS_READ_CFDC_UPDATED:
 295                 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
 296                 break;
 297         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 298                 adapter->adapter_features = sr_buf->payload.word[0];
 299                 break;
 300         }
 301
 302         mempool_free(sr_buf, adapter->pool.status_read_data);
 303         zfcp_fsf_req_free(req);
 304
 305         atomic_inc(&adapter->stat_miss);
 306         queue_work(adapter->work_queue, &adapter->stat_work);
 307 }
 308
 309 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 310 {
 311         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 312         case FSF_SQ_FCP_RSP_AVAILABLE:
 313         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 314         case FSF_SQ_NO_RETRY_POSSIBLE:
 315         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 316                 return;
 317         case FSF_SQ_COMMAND_ABORTED:
 318                 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
 319                 break;
 320         case FSF_SQ_NO_RECOM:
 321                 dev_err(&req->adapter->ccw_device->dev,
 322                         "The FCP adapter reported a problem "
 323                         "that cannot be recovered\n");
 324                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
 325                 break;
 326         }
 327         /* all non-return stats set FSFREQ_ERROR*/
 328         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 329 }
 330
 331 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 332 {
 333         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 334                 return;
 335
 336         switch (req->qtcb->header.fsf_status) {
 337         case FSF_UNKNOWN_COMMAND:
 338                 dev_err(&req->adapter->ccw_device->dev,
 339                         "The FCP adapter does not recognize the command 0x%x\n",
 340                         req->qtcb->header.fsf_command);
 341                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
 342                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 343                 break;
 344         case FSF_ADAPTER_STATUS_AVAILABLE:
 345                 zfcp_fsf_fsfstatus_qual_eval(req);
 346                 break;
 347         }
 348 }
 349
 350 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 351 {
 352         struct zfcp_adapter *adapter = req->adapter;
 353         struct fsf_qtcb *qtcb = req->qtcb;
 354         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 355
 356         zfcp_dbf_hba_fsf_response(req);
 357
 358         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 359                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 360                         ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
 361                 return;
 362         }
 363
 364         switch (qtcb->prefix.prot_status) {
 365         case FSF_PROT_GOOD:
 366         case FSF_PROT_FSF_STATUS_PRESENTED:
 367                 return;
 368         case FSF_PROT_QTCB_VERSION_ERROR:
 369                 dev_err(&adapter->ccw_device->dev,
 370                         "QTCB version 0x%x not supported by FCP adapter "
 371                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 372                         psq->word[0], psq->word[1]);
 373                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
 374                 break;
 375         case FSF_PROT_ERROR_STATE:
 376         case FSF_PROT_SEQ_NUMB_ERROR:
 377                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
 378                 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 379                 break;
 380         case FSF_PROT_UNSUPP_QTCB_TYPE:
 381                 dev_err(&adapter->ccw_device->dev,
 382                         "The QTCB type is not supported by the FCP adapter\n");
 383                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
 384                 break;
 385         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 386                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 387                                 &adapter->status);
 388                 break;
 389         case FSF_PROT_DUPLICATE_REQUEST_ID:
 390                 dev_err(&adapter->ccw_device->dev,
 391                         "0x%Lx is an ambiguous request identifier\n",
 392                         (unsigned long long)qtcb->bottom.support.req_handle);
 393                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
 394                 break;
 395         case FSF_PROT_LINK_DOWN:
 396                 zfcp_fsf_link_down_info_eval(req, "fspse_5",
 397                                              &psq->link_down_info);
 398                 /* FIXME: reopening adapter now? better wait for link up */
 399                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
 400                 break;
 401         case FSF_PROT_REEST_QUEUE:
 402                 /* All ports should be marked as ready to run again */
 403                 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
 404                                                ZFCP_STATUS_COMMON_RUNNING,
 405                                                ZFCP_SET);
 406                 zfcp_erp_adapter_reopen(adapter,
 407                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 408                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 409                                         "fspse_8", req);
 410                 break;
 411         default:
 412                 dev_err(&adapter->ccw_device->dev,
 413                         "0x%x is not a valid transfer protocol status\n",
 414                         qtcb->prefix.prot_status);
 415                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
 416         }
 417         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 418 }
 419
 420 /**
 421  * zfcp_fsf_req_complete - process completion of a FSF request
 422  * @fsf_req: The FSF request that has been completed.
 423  *
 424  * When a request has been completed either from the FCP adapter,
 425  * or it has been dismissed due to a queue shutdown, this function
 426  * is called to process the completion status and trigger further
 427  * events related to the FSF request.
 428  */
 429 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 430 {
 431         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 432                 zfcp_fsf_status_read_handler(req);
 433                 return;
 434         }
 435
 436         del_timer(&req->timer);
 437         zfcp_fsf_protstatus_eval(req);
 438         zfcp_fsf_fsfstatus_eval(req);
 439         req->handler(req);
 440
 441         if (req->erp_action)
 442                 zfcp_erp_notify(req->erp_action, 0);
 443
 444         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 445                 zfcp_fsf_req_free(req);
 446         else
 447                 complete(&req->completion);
 448 }
 449
 450 /**
 451  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 452  * @adapter: pointer to struct zfcp_adapter
 453  *
 454  * Never ever call this without shutting down the adapter first.
 455  * Otherwise the adapter would continue using and corrupting s390 storage.
 456  * Included BUG_ON() call to ensure this is done.
 457  * ERP is supposed to be the only user of this function.
 458  */
 459 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 460 {
 461         struct zfcp_fsf_req *req, *tmp;
 462         unsigned long flags;
 463         LIST_HEAD(remove_queue);
 464         unsigned int i;
 465
 466         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 467         spin_lock_irqsave(&adapter->req_list_lock, flags);
 468         for (i = 0; i < REQUEST_LIST_SIZE; i++)
 469                 list_splice_init(&adapter->req_list[i], &remove_queue);
 470         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 471
 472         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 473                 list_del(&req->list);
 474                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 475                 zfcp_fsf_req_complete(req);
 476         }
 477 }
 478
 479 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 480 {
 481         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 482         struct zfcp_adapter *adapter = req->adapter;
 483         struct Scsi_Host *shost = adapter->scsi_host;
 484         struct fc_els_flogi *nsp, *plogi;
 485
 486         /* adjust pointers for missing command code */
 487         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 488                                         - sizeof(u32));
 489         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 490                                         - sizeof(u32));
 491
 492         if (req->data)
 493                 memcpy(req->data, bottom, sizeof(*bottom));
 494
 495         fc_host_port_name(shost) = nsp->fl_wwpn;
 496         fc_host_node_name(shost) = nsp->fl_wwnn;
 497         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 498         fc_host_speed(shost) = bottom->fc_link_speed;
 499         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 500
 501         adapter->hydra_version = bottom->adapter_type;
 502         adapter->timer_ticks = bottom->timer_interval;
 503
 504         if (fc_host_permanent_port_name(shost) == -1)
 505                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 506
 507         switch (bottom->fc_topology) {
 508         case FSF_TOPO_P2P:
 509                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 510                 adapter->peer_wwpn = plogi->fl_wwpn;
 511                 adapter->peer_wwnn = plogi->fl_wwnn;
 512                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 513                 break;
 514         case FSF_TOPO_FABRIC:
 515                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 516                 break;
 517         case FSF_TOPO_AL:
 518                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 519                 /* fall through */
 520         default:
 521                 dev_err(&adapter->ccw_device->dev,
 522                         "Unknown or unsupported arbitrated loop "
 523                         "fibre channel topology detected\n");
 524                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
 525                 return -EIO;
 526         }
 527
 528         return 0;
 529 }
 530
 531 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 532 {
 533         struct zfcp_adapter *adapter = req->adapter;
 534         struct fsf_qtcb *qtcb = req->qtcb;
 535         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 536         struct Scsi_Host *shost = adapter->scsi_host;
 537
 538         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 539                 return;
 540
 541         adapter->fsf_lic_version = bottom->lic_version;
 542         adapter->adapter_features = bottom->adapter_features;
 543         adapter->connection_features = bottom->connection_features;
 544         adapter->peer_wwpn = 0;
 545         adapter->peer_wwnn = 0;
 546         adapter->peer_d_id = 0;
 547
 548         switch (qtcb->header.fsf_status) {
 549         case FSF_GOOD:
 550                 if (zfcp_fsf_exchange_config_evaluate(req))
 551                         return;
 552
 553                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 554                         dev_err(&adapter->ccw_device->dev,
 555                                 "FCP adapter maximum QTCB size (%d bytes) "
 556                                 "is too small\n",
 557                                 bottom->max_qtcb_size);
 558                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
 559                         return;
 560                 }
 561                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 562                                 &adapter->status);
 563                 break;
 564         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 565                 fc_host_node_name(shost) = 0;
 566                 fc_host_port_name(shost) = 0;
 567                 fc_host_port_id(shost) = 0;
 568                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 569                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 570                 adapter->hydra_version = 0;
 571
 572                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 573                                 &adapter->status);
 574
 575                 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
 576                         &qtcb->header.fsf_status_qual.link_down_info);
 577                 break;
 578         default:
 579                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
 580                 return;
 581         }
 582
 583         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 584                 adapter->hardware_version = bottom->hardware_version;
 585                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 586                        min(FC_SERIAL_NUMBER_SIZE, 17));
 587                 EBCASC(fc_host_serial_number(shost),
 588                        min(FC_SERIAL_NUMBER_SIZE, 17));
 589         }
 590
 591         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 592                 dev_err(&adapter->ccw_device->dev,
 593                         "The FCP adapter only supports newer "
 594                         "control block versions\n");
 595                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
 596                 return;
 597         }
 598         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 599                 dev_err(&adapter->ccw_device->dev,
 600                         "The FCP adapter only supports older "
 601                         "control block versions\n");
 602                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
 603         }
 604 }
 605
 606 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 607 {
 608         struct zfcp_adapter *adapter = req->adapter;
 609         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 610         struct Scsi_Host *shost = adapter->scsi_host;
 611
 612         if (req->data)
 613                 memcpy(req->data, bottom, sizeof(*bottom));
 614
 615         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 616                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 617                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 618         } else
 619                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 620         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 621         fc_host_supported_speeds(shost) = bottom->supported_speed;
 622 }
 623
 624 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 625 {
 626         struct fsf_qtcb *qtcb = req->qtcb;
 627
 628         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 629                 return;
 630
 631         switch (qtcb->header.fsf_status) {
 632         case FSF_GOOD:
 633                 zfcp_fsf_exchange_port_evaluate(req);
 634                 break;
 635         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 636                 zfcp_fsf_exchange_port_evaluate(req);
 637                 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
 638                         &qtcb->header.fsf_status_qual.link_down_info);
 639                 break;
 640         }
 641 }
 642
 643 static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
 644 {
 645         struct zfcp_qdio_queue *req_q = &qdio->req_q;
 646
 647         spin_lock_bh(&qdio->req_q_lock);
 648         if (atomic_read(&req_q->count))
 649                 return 1;
 650         spin_unlock_bh(&qdio->req_q_lock);
 651         return 0;
 652 }
 653
 654 static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
 655 {
 656         struct zfcp_adapter *adapter = qdio->adapter;
 657         long ret;
 658
 659         spin_unlock_bh(&qdio->req_q_lock);
 660         ret = wait_event_interruptible_timeout(qdio->req_q_wq,
 661                                zfcp_fsf_sbal_check(qdio), 5 * HZ);
 662         if (ret > 0)
 663                 return 0;
 664         if (!ret) {
 665                 atomic_inc(&qdio->req_q_full);
 666                 /* assume hanging outbound queue, try queue recovery */
 667                 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
 668         }
 669
 670         spin_lock_bh(&qdio->req_q_lock);
 671         return -EIO;
 672 }
 673
 674 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 675 {
 676         struct zfcp_fsf_req *req;
 677
 678         if (likely(pool))
 679                 req = mempool_alloc(pool, GFP_ATOMIC);
 680         else
 681                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 682
 683         if (unlikely(!req))
 684                 return NULL;
 685
 686         memset(req, 0, sizeof(*req));
 687         req->pool = pool;
 688         return req;
 689 }
 690
 691 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 692 {
 693         struct fsf_qtcb *qtcb;
 694
 695         if (likely(pool))
 696                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 697         else
 698                 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
 699
 700         if (unlikely(!qtcb))
 701                 return NULL;
 702
 703         memset(qtcb, 0, sizeof(*qtcb));
 704         return qtcb;
 705 }
 706
 707 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 708                                                 u32 fsf_cmd, mempool_t *pool)
 709 {
 710         struct qdio_buffer_element *sbale;
 711         struct zfcp_qdio_queue *req_q = &qdio->req_q;
 712         struct zfcp_adapter *adapter = qdio->adapter;
 713         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 714
 715         if (unlikely(!req))
 716                 return ERR_PTR(-ENOMEM);
 717
 718         if (adapter->req_no == 0)
 719                 adapter->req_no++;
 720
 721         INIT_LIST_HEAD(&req->list);
 722         init_timer(&req->timer);
 723         init_completion(&req->completion);
 724
 725         req->adapter = adapter;
 726         req->fsf_command = fsf_cmd;
 727         req->req_id = adapter->req_no;
 728         req->queue_req.sbal_number = 1;
 729         req->queue_req.sbal_first = req_q->first;
 730         req->queue_req.sbal_last = req_q->first;
 731         req->queue_req.sbale_curr = 1;
 732
 733         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 734         sbale[0].addr = (void *) req->req_id;
 735         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 736
 737         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 738                 if (likely(pool))
 739                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 740                 else
 741                         req->qtcb = zfcp_qtcb_alloc(NULL);
 742
 743                 if (unlikely(!req->qtcb)) {
 744                         zfcp_fsf_req_free(req);
 745                         return ERR_PTR(-ENOMEM);
 746                 }
 747
 748                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 749                 req->qtcb->prefix.req_id = req->req_id;
 750                 req->qtcb->prefix.ulp_info = 26;
 751                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 752                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 753                 req->qtcb->header.req_handle = req->req_id;
 754                 req->qtcb->header.fsf_command = req->fsf_command;
 755                 req->seq_no = adapter->fsf_req_seq_no;
 756                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 757                 sbale[1].addr = (void *) req->qtcb;
 758                 sbale[1].length = sizeof(struct fsf_qtcb);
 759         }
 760
 761         if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
 762                 zfcp_fsf_req_free(req);
 763                 return ERR_PTR(-EIO);
 764         }
 765
 766         return req;
 767 }
 768
 769 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 770 {
 771         struct zfcp_adapter *adapter = req->adapter;
 772         struct zfcp_qdio *qdio = adapter->qdio;
 773         unsigned long        flags;
 774         int                  idx;
 775         int                  with_qtcb = (req->qtcb != NULL);
 776
 777         /* put allocated FSF request into hash table */
 778         spin_lock_irqsave(&adapter->req_list_lock, flags);
 779         idx = zfcp_reqlist_hash(req->req_id);
 780         list_add_tail(&req->list, &adapter->req_list[idx]);
 781         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 782
 783         req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
 784         req->issued = get_clock();
 785         if (zfcp_qdio_send(qdio, &req->queue_req)) {
 786                 del_timer(&req->timer);
 787                 spin_lock_irqsave(&adapter->req_list_lock, flags);
 788                 /* lookup request again, list might have changed */
 789                 if (zfcp_reqlist_find_safe(adapter, req))
 790                         zfcp_reqlist_remove(adapter, req);
 791                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 792                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
 793                 return -EIO;
 794         }
 795
 796         /* Don't increase for unsolicited status */
 797         if (with_qtcb)
 798                 adapter->fsf_req_seq_no++;
 799         adapter->req_no++;
 800
 801         return 0;
 802 }
 803
 804 /**
 805  * zfcp_fsf_status_read - send status read request
 806  * @adapter: pointer to struct zfcp_adapter
 807  * @req_flags: request flags
 808  * Returns: 0 on success, ERROR otherwise
 809  */
 810 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 811 {
 812         struct zfcp_adapter *adapter = qdio->adapter;
 813         struct zfcp_fsf_req *req;
 814         struct fsf_status_read_buffer *sr_buf;
 815         struct qdio_buffer_element *sbale;
 816         int retval = -EIO;
 817
 818         spin_lock_bh(&qdio->req_q_lock);
 819         if (zfcp_fsf_req_sbal_get(qdio))
 820                 goto out;
 821
 822         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 823                                   adapter->pool.status_read_req);
 824         if (IS_ERR(req)) {
 825                 retval = PTR_ERR(req);
 826                 goto out;
 827         }
 828
 829         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 830         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 831         req->queue_req.sbale_curr = 2;
 832
 833         sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 834         if (!sr_buf) {
 835                 retval = -ENOMEM;
 836                 goto failed_buf;
 837         }
 838         memset(sr_buf, 0, sizeof(*sr_buf));
 839         req->data = sr_buf;
 840         sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
 841         sbale->addr = (void *) sr_buf;
 842         sbale->length = sizeof(*sr_buf);
 843
 844         retval = zfcp_fsf_req_send(req);
 845         if (retval)
 846                 goto failed_req_send;
 847
 848         goto out;
 849
 850 failed_req_send:
 851         mempool_free(sr_buf, adapter->pool.status_read_data);
 852 failed_buf:
 853         zfcp_fsf_req_free(req);
 854         zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
 855 out:
 856         spin_unlock_bh(&qdio->req_q_lock);
 857         return retval;
 858 }
 859
 860 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 861 {
 862         struct zfcp_unit *unit = req->data;
 863         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 864
 865         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 866                 return;
 867
 868         switch (req->qtcb->header.fsf_status) {
 869         case FSF_PORT_HANDLE_NOT_VALID:
 870                 if (fsq->word[0] == fsq->word[1]) {
 871                         zfcp_erp_adapter_reopen(unit->port->adapter, 0,
 872                                                 "fsafch1", req);
 873                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 874                 }
 875                 break;
 876         case FSF_LUN_HANDLE_NOT_VALID:
 877                 if (fsq->word[0] == fsq->word[1]) {
 878                         zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
 879                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 880                 }
 881                 break;
 882         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 883                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 884                 break;
 885         case FSF_PORT_BOXED:
 886                 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
 887                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 888                                ZFCP_STATUS_FSFREQ_RETRY;
 889                 break;
 890         case FSF_LUN_BOXED:
 891                 zfcp_erp_unit_boxed(unit, "fsafch4", req);
 892                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 893                                ZFCP_STATUS_FSFREQ_RETRY;
 894                 break;
 895         case FSF_ADAPTER_STATUS_AVAILABLE:
 896                 switch (fsq->word[0]) {
 897                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 898                         zfcp_fc_test_link(unit->port);
 899                         /* fall through */
 900                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 901                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 902                         break;
 903                 }
 904                 break;
 905         case FSF_GOOD:
 906                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 907                 break;
 908         }
 909 }
 910
 911 /**
 912  * zfcp_fsf_abort_fcp_command - abort running SCSI command
 913  * @old_req_id: unsigned long
 914  * @unit: pointer to struct zfcp_unit
 915  * Returns: pointer to struct zfcp_fsf_req
 916  */
 917
 918 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 919                                                 struct zfcp_unit *unit)
 920 {
 921         struct qdio_buffer_element *sbale;
 922         struct zfcp_fsf_req *req = NULL;
 923         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
 924
 925         spin_lock_bh(&qdio->req_q_lock);
 926         if (zfcp_fsf_req_sbal_get(qdio))
 927                 goto out;
 928         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 929                                   qdio->adapter->pool.scsi_abort);
 930         if (IS_ERR(req)) {
 931                 req = NULL;
 932                 goto out;
 933         }
 934
 935         if (unlikely(!(atomic_read(&unit->status) &
 936                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 937                 goto out_error_free;
 938
 939         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 940         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 941         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 942
 943         req->data = unit;
 944         req->handler = zfcp_fsf_abort_fcp_command_handler;
 945         req->qtcb->header.lun_handle = unit->handle;
 946         req->qtcb->header.port_handle = unit->port->handle;
 947         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 948
 949         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 950         if (!zfcp_fsf_req_send(req))
 951                 goto out;
 952
 953 out_error_free:
 954         zfcp_fsf_req_free(req);
 955         req = NULL;
 956 out:
 957         spin_unlock_bh(&qdio->req_q_lock);
 958         return req;
 959 }
 960
 961 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 962 {
 963         struct zfcp_adapter *adapter = req->adapter;
 964         struct zfcp_fsf_ct_els *ct = req->data;
 965         struct fsf_qtcb_header *header = &req->qtcb->header;
 966
 967         ct->status = -EINVAL;
 968
 969         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 970                 goto skip_fsfstatus;
 971
 972         switch (header->fsf_status) {
 973         case FSF_GOOD:
 974                 zfcp_dbf_san_ct_response(req);
 975                 ct->status = 0;
 976                 break;
 977         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 978                 zfcp_fsf_class_not_supp(req);
 979                 break;
 980         case FSF_ADAPTER_STATUS_AVAILABLE:
 981                 switch (header->fsf_status_qual.word[0]){
 982                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 983                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 984                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 985                         break;
 986                 }
 987                 break;
 988         case FSF_ACCESS_DENIED:
 989                 break;
 990         case FSF_PORT_BOXED:
 991                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 992                                ZFCP_STATUS_FSFREQ_RETRY;
 993                 break;
 994         case FSF_PORT_HANDLE_NOT_VALID:
 995                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
 996                 /* fall through */
 997         case FSF_GENERIC_COMMAND_REJECTED:
 998         case FSF_PAYLOAD_SIZE_MISMATCH:
 999         case FSF_REQUEST_SIZE_TOO_LARGE:
1000         case FSF_RESPONSE_SIZE_TOO_LARGE:
1001         case FSF_SBAL_MISMATCH:
1002                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1003                 break;
1004         }
1005
1006 skip_fsfstatus:
1007         if (ct->handler)
1008                 ct->handler(ct->handler_data);
1009 }
1010
1011 static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1012                                             struct scatterlist *sg_req,
1013                                             struct scatterlist *sg_resp)
1014 {
1015         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1016         sbale[2].addr   = sg_virt(sg_req);
1017         sbale[2].length = sg_req->length;
1018         sbale[3].addr   = sg_virt(sg_resp);
1019         sbale[3].length = sg_resp->length;
1020         sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1021 }
1022
1023 static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1024 {
1025         return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1026 }
1027
1028 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1029                                        struct scatterlist *sg_req,
1030                                        struct scatterlist *sg_resp,
1031                                        int max_sbals)
1032 {
1033         struct zfcp_adapter *adapter = req->adapter;
1034         struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
1035                                                                &req->queue_req);
1036         u32 feat = adapter->adapter_features;
1037         int bytes;
1038
1039         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1040                 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
1041                         return -EOPNOTSUPP;
1042
1043                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1044                 return 0;
1045         }
1046
1047         /* use single, unchained SBAL if it can hold the request */
1048         if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1049                 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1050                 return 0;
1051         }
1052
1053         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1054                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1055                                         sg_req, max_sbals);
1056         if (bytes <= 0)
1057                 return -EIO;
1058         req->qtcb->bottom.support.req_buf_length = bytes;
1059         req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1060
1061         bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
1062                                         SBAL_FLAGS0_TYPE_WRITE_READ,
1063                                         sg_resp, max_sbals);
1064         req->qtcb->bottom.support.resp_buf_length = bytes;
1065         if (bytes <= 0)
1066                 return -EIO;
1067
1068         return 0;
1069 }
1070
1071 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1072                                  struct scatterlist *sg_req,
1073                                  struct scatterlist *sg_resp,
1074                                  int max_sbals)
1075 {
1076         int ret;
1077         unsigned int fcp_chan_timeout;
1078
1079         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1080         if (ret)
1081                 return ret;
1082
1083         /* common settings for ct/gs and els requests */
1084         fcp_chan_timeout = 2 * FC_DEF_R_A_TOV / 1000;
1085         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1086         req->qtcb->bottom.support.timeout = fcp_chan_timeout;
1087         zfcp_fsf_start_timer(req, (fcp_chan_timeout + 10) * HZ);
1088
1089         return 0;
1090 }
1091
1092 /**
1093  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1094  * @ct: pointer to struct zfcp_send_ct with data for request
1095  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1096  */
1097 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1098                      struct zfcp_fsf_ct_els *ct, mempool_t *pool)
1099 {
1100         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1101         struct zfcp_fsf_req *req;
1102         int ret = -EIO;
1103
1104         spin_lock_bh(&qdio->req_q_lock);
1105         if (zfcp_fsf_req_sbal_get(qdio))
1106                 goto out;
1107
1108         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
1109
1110         if (IS_ERR(req)) {
1111                 ret = PTR_ERR(req);
1112                 goto out;
1113         }
1114
1115         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1116         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1117                                     FSF_MAX_SBALS_PER_REQ);
1118         if (ret)
1119                 goto failed_send;
1120
1121         req->handler = zfcp_fsf_send_ct_handler;
1122         req->qtcb->header.port_handle = wka_port->handle;
1123         req->data = ct;
1124
1125         zfcp_dbf_san_ct_request(req, wka_port->d_id);
1126
1127         ret = zfcp_fsf_req_send(req);
1128         if (ret)
1129                 goto failed_send;
1130
1131         goto out;
1132
1133 failed_send:
1134         zfcp_fsf_req_free(req);
1135 out:
1136         spin_unlock_bh(&qdio->req_q_lock);
1137         return ret;
1138 }
1139
1140 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1141 {
1142         struct zfcp_fsf_ct_els *send_els = req->data;
1143         struct zfcp_port *port = send_els->port;
1144         struct fsf_qtcb_header *header = &req->qtcb->header;
1145
1146         send_els->status = -EINVAL;
1147
1148         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1149                 goto skip_fsfstatus;
1150
1151         switch (header->fsf_status) {
1152         case FSF_GOOD:
1153                 zfcp_dbf_san_els_response(req);
1154                 send_els->status = 0;
1155                 break;
1156         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1157                 zfcp_fsf_class_not_supp(req);
1158                 break;
1159         case FSF_ADAPTER_STATUS_AVAILABLE:
1160                 switch (header->fsf_status_qual.word[0]){
1161                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1162                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1163                 case FSF_SQ_RETRY_IF_POSSIBLE:
1164                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1165                         break;
1166                 }
1167                 break;
1168         case FSF_ELS_COMMAND_REJECTED:
1169         case FSF_PAYLOAD_SIZE_MISMATCH:
1170         case FSF_REQUEST_SIZE_TOO_LARGE:
1171         case FSF_RESPONSE_SIZE_TOO_LARGE:
1172                 break;
1173         case FSF_ACCESS_DENIED:
1174                 if (port)
1175                         zfcp_fsf_access_denied_port(req, port);
1176                 break;
1177         case FSF_SBAL_MISMATCH:
1178                 /* should never occure, avoided in zfcp_fsf_send_els */
1179                 /* fall through */
1180         default:
1181                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1182                 break;
1183         }
1184 skip_fsfstatus:
1185         if (send_els->handler)
1186                 send_els->handler(send_els->handler_data);
1187 }
1188
1189 /**
1190  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1191  * @els: pointer to struct zfcp_send_els with data for the command
1192  */
1193 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1194                       struct zfcp_fsf_ct_els *els)
1195 {
1196         struct zfcp_fsf_req *req;
1197         struct zfcp_qdio *qdio = adapter->qdio;
1198         int ret = -EIO;
1199
1200         spin_lock_bh(&qdio->req_q_lock);
1201         if (zfcp_fsf_req_sbal_get(qdio))
1202                 goto out;
1203
1204         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
1205
1206         if (IS_ERR(req)) {
1207                 ret = PTR_ERR(req);
1208                 goto out;
1209         }
1210
1211         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1212         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
1213
1214         if (ret)
1215                 goto failed_send;
1216
1217         hton24(req->qtcb->bottom.support.d_id, d_id);
1218         req->handler = zfcp_fsf_send_els_handler;
1219         req->data = els;
1220
1221         zfcp_dbf_san_els_request(req);
1222
1223         ret = zfcp_fsf_req_send(req);
1224         if (ret)
1225                 goto failed_send;
1226
1227         goto out;
1228
1229 failed_send:
1230         zfcp_fsf_req_free(req);
1231 out:
1232         spin_unlock_bh(&qdio->req_q_lock);
1233         return ret;
1234 }
1235
1236 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1237 {
1238         struct qdio_buffer_element *sbale;
1239         struct zfcp_fsf_req *req;
1240         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1241         int retval = -EIO;
1242
1243         spin_lock_bh(&qdio->req_q_lock);
1244         if (zfcp_fsf_req_sbal_get(qdio))
1245                 goto out;
1246
1247         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1248                                   qdio->adapter->pool.erp_req);
1249
1250         if (IS_ERR(req)) {
1251                 retval = PTR_ERR(req);
1252                 goto out;
1253         }
1254
1255         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1256         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1257         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1258         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1259
1260         req->qtcb->bottom.config.feature_selection =
1261                         FSF_FEATURE_CFDC |
1262                         FSF_FEATURE_LUN_SHARING |
1263                         FSF_FEATURE_NOTIFICATION_LOST |
1264                         FSF_FEATURE_UPDATE_ALERT;
1265         req->erp_action = erp_action;
1266         req->handler = zfcp_fsf_exchange_config_data_handler;
1267         erp_action->fsf_req = req;
1268
1269         zfcp_fsf_start_erp_timer(req);
1270         retval = zfcp_fsf_req_send(req);
1271         if (retval) {
1272                 zfcp_fsf_req_free(req);
1273                 erp_action->fsf_req = NULL;
1274         }
1275 out:
1276         spin_unlock_bh(&qdio->req_q_lock);
1277         return retval;
1278 }
1279
1280 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1281                                        struct fsf_qtcb_bottom_config *data)
1282 {
1283         struct qdio_buffer_element *sbale;
1284         struct zfcp_fsf_req *req = NULL;
1285         int retval = -EIO;
1286
1287         spin_lock_bh(&qdio->req_q_lock);
1288         if (zfcp_fsf_req_sbal_get(qdio))
1289                 goto out_unlock;
1290
1291         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
1292
1293         if (IS_ERR(req)) {
1294                 retval = PTR_ERR(req);
1295                 goto out_unlock;
1296         }
1297
1298         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1299         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1300         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1301         req->handler = zfcp_fsf_exchange_config_data_handler;
1302
1303         req->qtcb->bottom.config.feature_selection =
1304                         FSF_FEATURE_CFDC |
1305                         FSF_FEATURE_LUN_SHARING |
1306                         FSF_FEATURE_NOTIFICATION_LOST |
1307                         FSF_FEATURE_UPDATE_ALERT;
1308
1309         if (data)
1310                 req->data = data;
1311
1312         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1313         retval = zfcp_fsf_req_send(req);
1314         spin_unlock_bh(&qdio->req_q_lock);
1315         if (!retval)
1316                 wait_for_completion(&req->completion);
1317
1318         zfcp_fsf_req_free(req);
1319         return retval;
1320
1321 out_unlock:
1322         spin_unlock_bh(&qdio->req_q_lock);
1323         return retval;
1324 }
1325
1326 /**
1327  * zfcp_fsf_exchange_port_data - request information about local port
1328  * @erp_action: ERP action for the adapter for which port data is requested
1329  * Returns: 0 on success, error otherwise
1330  */
1331 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1332 {
1333         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1334         struct qdio_buffer_element *sbale;
1335         struct zfcp_fsf_req *req;
1336         int retval = -EIO;
1337
1338         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1339                 return -EOPNOTSUPP;
1340
1341         spin_lock_bh(&qdio->req_q_lock);
1342         if (zfcp_fsf_req_sbal_get(qdio))
1343                 goto out;
1344
1345         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1346                                   qdio->adapter->pool.erp_req);
1347
1348         if (IS_ERR(req)) {
1349                 retval = PTR_ERR(req);
1350                 goto out;
1351         }
1352
1353         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1354         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1355         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1356         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1357
1358         req->handler = zfcp_fsf_exchange_port_data_handler;
1359         req->erp_action = erp_action;
1360         erp_action->fsf_req = req;
1361
1362         zfcp_fsf_start_erp_timer(req);
1363         retval = zfcp_fsf_req_send(req);
1364         if (retval) {
1365                 zfcp_fsf_req_free(req);
1366                 erp_action->fsf_req = NULL;
1367         }
1368 out:
1369         spin_unlock_bh(&qdio->req_q_lock);
1370         return retval;
1371 }
1372
1373 /**
1374  * zfcp_fsf_exchange_port_data_sync - request information about local port
1375  * @qdio: pointer to struct zfcp_qdio
1376  * @data: pointer to struct fsf_qtcb_bottom_port
1377  * Returns: 0 on success, error otherwise
1378  */
1379 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1380                                      struct fsf_qtcb_bottom_port *data)
1381 {
1382         struct qdio_buffer_element *sbale;
1383         struct zfcp_fsf_req *req = NULL;
1384         int retval = -EIO;
1385
1386         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1387                 return -EOPNOTSUPP;
1388
1389         spin_lock_bh(&qdio->req_q_lock);
1390         if (zfcp_fsf_req_sbal_get(qdio))
1391                 goto out_unlock;
1392
1393         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
1394
1395         if (IS_ERR(req)) {
1396                 retval = PTR_ERR(req);
1397                 goto out_unlock;
1398         }
1399
1400         if (data)
1401                 req->data = data;
1402
1403         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1404         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1405         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1406
1407         req->handler = zfcp_fsf_exchange_port_data_handler;
1408         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1409         retval = zfcp_fsf_req_send(req);
1410         spin_unlock_bh(&qdio->req_q_lock);
1411
1412         if (!retval)
1413                 wait_for_completion(&req->completion);
1414
1415         zfcp_fsf_req_free(req);
1416
1417         return retval;
1418
1419 out_unlock:
1420         spin_unlock_bh(&qdio->req_q_lock);
1421         return retval;
1422 }
1423
1424 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1425 {
1426         struct zfcp_port *port = req->data;
1427         struct fsf_qtcb_header *header = &req->qtcb->header;
1428         struct fc_els_flogi *plogi;
1429
1430         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1431                 goto out;
1432
1433         switch (header->fsf_status) {
1434         case FSF_PORT_ALREADY_OPEN:
1435                 break;
1436         case FSF_ACCESS_DENIED:
1437                 zfcp_fsf_access_denied_port(req, port);
1438                 break;
1439         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1440                 dev_warn(&req->adapter->ccw_device->dev,
1441                          "Not enough FCP adapter resources to open "
1442                          "remote port 0x%016Lx\n",
1443                          (unsigned long long)port->wwpn);
1444                 zfcp_erp_port_failed(port, "fsoph_1", req);
1445                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1446                 break;
1447         case FSF_ADAPTER_STATUS_AVAILABLE:
1448                 switch (header->fsf_status_qual.word[0]) {
1449                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1450                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1451                 case FSF_SQ_NO_RETRY_POSSIBLE:
1452                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1453                         break;
1454                 }
1455                 break;
1456         case FSF_GOOD:
1457                 port->handle = header->port_handle;
1458                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1459                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1460                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1461                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1462                                   &port->status);
1463                 /* check whether D_ID has changed during open */
1464                 /*
1465                  * FIXME: This check is not airtight, as the FCP channel does
1466                  * not monitor closures of target port connections caused on
1467                  * the remote side. Thus, they might miss out on invalidating
1468                  * locally cached WWPNs (and other N_Port parameters) of gone
1469                  * target ports. So, our heroic attempt to make things safe
1470                  * could be undermined by 'open port' response data tagged with
1471                  * obsolete WWPNs. Another reason to monitor potential
1472                  * connection closures ourself at least (by interpreting
1473                  * incoming ELS' and unsolicited status). It just crosses my
1474                  * mind that one should be able to cross-check by means of
1475                  * another GID_PN straight after a port has been opened.
1476                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1477                  */
1478                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1479                 if (req->qtcb->bottom.support.els1_length >=
1480                     FSF_PLOGI_MIN_LEN)
1481                                 zfcp_fc_plogi_evaluate(port, plogi);
1482                 break;
1483         case FSF_UNKNOWN_OP_SUBTYPE:
1484                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1485                 break;
1486         }
1487
1488 out:
1489         put_device(&port->sysfs_device);
1490 }
1491
1492 /**
1493  * zfcp_fsf_open_port - create and send open port request
1494  * @erp_action: pointer to struct zfcp_erp_action
1495  * Returns: 0 on success, error otherwise
1496  */
1497 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1498 {
1499         struct qdio_buffer_element *sbale;
1500         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1501         struct zfcp_port *port = erp_action->port;
1502         struct zfcp_fsf_req *req;
1503         int retval = -EIO;
1504
1505         spin_lock_bh(&qdio->req_q_lock);
1506         if (zfcp_fsf_req_sbal_get(qdio))
1507                 goto out;
1508
1509         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1510                                   qdio->adapter->pool.erp_req);
1511
1512         if (IS_ERR(req)) {
1513                 retval = PTR_ERR(req);
1514                 goto out;
1515         }
1516
1517         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1518         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1519         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1520         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1521
1522         req->handler = zfcp_fsf_open_port_handler;
1523         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1524         req->data = port;
1525         req->erp_action = erp_action;
1526         erp_action->fsf_req = req;
1527         get_device(&port->sysfs_device);
1528
1529         zfcp_fsf_start_erp_timer(req);
1530         retval = zfcp_fsf_req_send(req);
1531         if (retval) {
1532                 zfcp_fsf_req_free(req);
1533                 erp_action->fsf_req = NULL;
1534                 put_device(&port->sysfs_device);
1535         }
1536 out:
1537         spin_unlock_bh(&qdio->req_q_lock);
1538         return retval;
1539 }
1540
1541 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1542 {
1543         struct zfcp_port *port = req->data;
1544
1545         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1546                 return;
1547
1548         switch (req->qtcb->header.fsf_status) {
1549         case FSF_PORT_HANDLE_NOT_VALID:
1550                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
1551                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1552                 break;
1553         case FSF_ADAPTER_STATUS_AVAILABLE:
1554                 break;
1555         case FSF_GOOD:
1556                 zfcp_erp_modify_port_status(port, "fscph_2", req,
1557                                             ZFCP_STATUS_COMMON_OPEN,
1558                                             ZFCP_CLEAR);
1559                 break;
1560         }
1561 }
1562
1563 /**
1564  * zfcp_fsf_close_port - create and send close port request
1565  * @erp_action: pointer to struct zfcp_erp_action
1566  * Returns: 0 on success, error otherwise
1567  */
1568 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1569 {
1570         struct qdio_buffer_element *sbale;
1571         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1572         struct zfcp_fsf_req *req;
1573         int retval = -EIO;
1574
1575         spin_lock_bh(&qdio->req_q_lock);
1576         if (zfcp_fsf_req_sbal_get(qdio))
1577                 goto out;
1578
1579         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1580                                   qdio->adapter->pool.erp_req);
1581
1582         if (IS_ERR(req)) {
1583                 retval = PTR_ERR(req);
1584                 goto out;
1585         }
1586
1587         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1588         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1589         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1590         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1591
1592         req->handler = zfcp_fsf_close_port_handler;
1593         req->data = erp_action->port;
1594         req->erp_action = erp_action;
1595         req->qtcb->header.port_handle = erp_action->port->handle;
1596         erp_action->fsf_req = req;
1597
1598         zfcp_fsf_start_erp_timer(req);
1599         retval = zfcp_fsf_req_send(req);
1600         if (retval) {
1601                 zfcp_fsf_req_free(req);
1602                 erp_action->fsf_req = NULL;
1603         }
1604 out:
1605         spin_unlock_bh(&qdio->req_q_lock);
1606         return retval;
1607 }
1608
1609 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1610 {
1611         struct zfcp_fc_wka_port *wka_port = req->data;
1612         struct fsf_qtcb_header *header = &req->qtcb->header;
1613
1614         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1615                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1616                 goto out;
1617         }
1618
1619         switch (header->fsf_status) {
1620         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1621                 dev_warn(&req->adapter->ccw_device->dev,
1622                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1623                 /* fall through */
1624         case FSF_ADAPTER_STATUS_AVAILABLE:
1625                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1626                 /* fall through */
1627         case FSF_ACCESS_DENIED:
1628                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1629                 break;
1630         case FSF_GOOD:
1631                 wka_port->handle = header->port_handle;
1632                 /* fall through */
1633         case FSF_PORT_ALREADY_OPEN:
1634                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1635         }
1636 out:
1637         wake_up(&wka_port->completion_wq);
1638 }
1639
1640 /**
1641  * zfcp_fsf_open_wka_port - create and send open wka-port request
1642  * @wka_port: pointer to struct zfcp_fc_wka_port
1643  * Returns: 0 on success, error otherwise
1644  */
1645 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1646 {
1647         struct qdio_buffer_element *sbale;
1648         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1649         struct zfcp_fsf_req *req;
1650         int retval = -EIO;
1651
1652         spin_lock_bh(&qdio->req_q_lock);
1653         if (zfcp_fsf_req_sbal_get(qdio))
1654                 goto out;
1655
1656         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1657                                   qdio->adapter->pool.erp_req);
1658
1659         if (unlikely(IS_ERR(req))) {
1660                 retval = PTR_ERR(req);
1661                 goto out;
1662         }
1663
1664         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1665         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1666         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1667         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1668
1669         req->handler = zfcp_fsf_open_wka_port_handler;
1670         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1671         req->data = wka_port;
1672
1673         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1674         retval = zfcp_fsf_req_send(req);
1675         if (retval)
1676                 zfcp_fsf_req_free(req);
1677 out:
1678         spin_unlock_bh(&qdio->req_q_lock);
1679         return retval;
1680 }
1681
1682 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1683 {
1684         struct zfcp_fc_wka_port *wka_port = req->data;
1685
1686         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1687                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1688                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
1689         }
1690
1691         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1692         wake_up(&wka_port->completion_wq);
1693 }
1694
1695 /**
1696  * zfcp_fsf_close_wka_port - create and send close wka port request
1697  * @wka_port: WKA port to open
1698  * Returns: 0 on success, error otherwise
1699  */
1700 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1701 {
1702         struct qdio_buffer_element *sbale;
1703         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1704         struct zfcp_fsf_req *req;
1705         int retval = -EIO;
1706
1707         spin_lock_bh(&qdio->req_q_lock);
1708         if (zfcp_fsf_req_sbal_get(qdio))
1709                 goto out;
1710
1711         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1712                                   qdio->adapter->pool.erp_req);
1713
1714         if (unlikely(IS_ERR(req))) {
1715                 retval = PTR_ERR(req);
1716                 goto out;
1717         }
1718
1719         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1720         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1721         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1722         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1723
1724         req->handler = zfcp_fsf_close_wka_port_handler;
1725         req->data = wka_port;
1726         req->qtcb->header.port_handle = wka_port->handle;
1727
1728         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1729         retval = zfcp_fsf_req_send(req);
1730         if (retval)
1731                 zfcp_fsf_req_free(req);
1732 out:
1733         spin_unlock_bh(&qdio->req_q_lock);
1734         return retval;
1735 }
1736
1737 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1738 {
1739         struct zfcp_port *port = req->data;
1740         struct fsf_qtcb_header *header = &req->qtcb->header;
1741         struct zfcp_unit *unit;
1742
1743         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1744                 return;
1745
1746         switch (header->fsf_status) {
1747         case FSF_PORT_HANDLE_NOT_VALID:
1748                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
1749                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1750                 break;
1751         case FSF_ACCESS_DENIED:
1752                 zfcp_fsf_access_denied_port(req, port);
1753                 break;
1754         case FSF_PORT_BOXED:
1755                 /* can't use generic zfcp_erp_modify_port_status because
1756                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1757                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1758                 read_lock(&port->unit_list_lock);
1759                 list_for_each_entry(unit, &port->unit_list, list)
1760                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1761                                           &unit->status);
1762                 read_unlock(&port->unit_list_lock);
1763                 zfcp_erp_port_boxed(port, "fscpph2", req);
1764                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1765                                ZFCP_STATUS_FSFREQ_RETRY;
1766
1767                 break;
1768         case FSF_ADAPTER_STATUS_AVAILABLE:
1769                 switch (header->fsf_status_qual.word[0]) {
1770                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1771                         /* fall through */
1772                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1773                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1774                         break;
1775                 }
1776                 break;
1777         case FSF_GOOD:
1778                 /* can't use generic zfcp_erp_modify_port_status because
1779                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1780                  */
1781                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1782                 read_lock(&port->unit_list_lock);
1783                 list_for_each_entry(unit, &port->unit_list, list)
1784                         atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1785                                           &unit->status);
1786                 read_unlock(&port->unit_list_lock);
1787                 break;
1788         }
1789 }
1790
1791 /**
1792  * zfcp_fsf_close_physical_port - close physical port
1793  * @erp_action: pointer to struct zfcp_erp_action
1794  * Returns: 0 on success
1795  */
1796 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1797 {
1798         struct qdio_buffer_element *sbale;
1799         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1800         struct zfcp_fsf_req *req;
1801         int retval = -EIO;
1802
1803         spin_lock_bh(&qdio->req_q_lock);
1804         if (zfcp_fsf_req_sbal_get(qdio))
1805                 goto out;
1806
1807         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1808                                   qdio->adapter->pool.erp_req);
1809
1810         if (IS_ERR(req)) {
1811                 retval = PTR_ERR(req);
1812                 goto out;
1813         }
1814
1815         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1816         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1817         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1818         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1819
1820         req->data = erp_action->port;
1821         req->qtcb->header.port_handle = erp_action->port->handle;
1822         req->erp_action = erp_action;
1823         req->handler = zfcp_fsf_close_physical_port_handler;
1824         erp_action->fsf_req = req;
1825
1826         zfcp_fsf_start_erp_timer(req);
1827         retval = zfcp_fsf_req_send(req);
1828         if (retval) {
1829                 zfcp_fsf_req_free(req);
1830                 erp_action->fsf_req = NULL;
1831         }
1832 out:
1833         spin_unlock_bh(&qdio->req_q_lock);
1834         return retval;
1835 }
1836
1837 static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1838 {
1839         struct zfcp_adapter *adapter = req->adapter;
1840         struct zfcp_unit *unit = req->data;
1841         struct fsf_qtcb_header *header = &req->qtcb->header;
1842         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1843         struct fsf_queue_designator *queue_designator =
1844                                 &header->fsf_status_qual.fsf_queue_designator;
1845         int exclusive, readwrite;
1846
1847         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1848                 return;
1849
1850         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1851                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1852                           ZFCP_STATUS_UNIT_SHARED |
1853                           ZFCP_STATUS_UNIT_READONLY,
1854                           &unit->status);
1855
1856         switch (header->fsf_status) {
1857
1858         case FSF_PORT_HANDLE_NOT_VALID:
1859                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
1860                 /* fall through */
1861         case FSF_LUN_ALREADY_OPEN:
1862                 break;
1863         case FSF_ACCESS_DENIED:
1864                 zfcp_fsf_access_denied_unit(req, unit);
1865                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1866                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1867                 break;
1868         case FSF_PORT_BOXED:
1869                 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
1870                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1871                                ZFCP_STATUS_FSFREQ_RETRY;
1872                 break;
1873         case FSF_LUN_SHARING_VIOLATION:
1874                 if (header->fsf_status_qual.word[0])
1875                         dev_warn(&adapter->ccw_device->dev,
1876                                  "LUN 0x%Lx on port 0x%Lx is already in "
1877                                  "use by CSS%d, MIF Image ID %x\n",
1878                                  (unsigned long long)unit->fcp_lun,
1879                                  (unsigned long long)unit->port->wwpn,
1880                                  queue_designator->cssid,
1881                                  queue_designator->hla);
1882                 else
1883                         zfcp_act_eval_err(adapter,
1884                                           header->fsf_status_qual.word[2]);
1885                 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1886                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1887                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1888                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1889                 break;
1890         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1891                 dev_warn(&adapter->ccw_device->dev,
1892                          "No handle is available for LUN "
1893                          "0x%016Lx on port 0x%016Lx\n",
1894                          (unsigned long long)unit->fcp_lun,
1895                          (unsigned long long)unit->port->wwpn);
1896                 zfcp_erp_unit_failed(unit, "fsouh_4", req);
1897                 /* fall through */
1898         case FSF_INVALID_COMMAND_OPTION:
1899                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1900                 break;
1901         case FSF_ADAPTER_STATUS_AVAILABLE:
1902                 switch (header->fsf_status_qual.word[0]) {
1903                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1904                         zfcp_fc_test_link(unit->port);
1905                         /* fall through */
1906                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1907                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908                         break;
1909                 }
1910                 break;
1911
1912         case FSF_GOOD:
1913                 unit->handle = header->lun_handle;
1914                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1915
1916                 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1917                     (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1918                     !zfcp_ccw_priv_sch(adapter)) {
1919                         exclusive = (bottom->lun_access_info &
1920                                         FSF_UNIT_ACCESS_EXCLUSIVE);
1921                         readwrite = (bottom->lun_access_info &
1922                                         FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1923
1924                         if (!exclusive)
1925                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1926                                                 &unit->status);
1927
1928                         if (!readwrite) {
1929                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1930                                                 &unit->status);
1931                                 dev_info(&adapter->ccw_device->dev,
1932                                          "SCSI device at LUN 0x%016Lx on port "
1933                                          "0x%016Lx opened read-only\n",
1934                                          (unsigned long long)unit->fcp_lun,
1935                                          (unsigned long long)unit->port->wwpn);
1936                         }
1937
1938                         if (exclusive && !readwrite) {
1939                                 dev_err(&adapter->ccw_device->dev,
1940                                         "Exclusive read-only access not "
1941                                         "supported (unit 0x%016Lx, "
1942                                         "port 0x%016Lx)\n",
1943                                         (unsigned long long)unit->fcp_lun,
1944                                         (unsigned long long)unit->port->wwpn);
1945                                 zfcp_erp_unit_failed(unit, "fsouh_5", req);
1946                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1947                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1948                         } else if (!exclusive && readwrite) {
1949                                 dev_err(&adapter->ccw_device->dev,
1950                                         "Shared read-write access not "
1951                                         "supported (unit 0x%016Lx, port "
1952                                         "0x%016Lx)\n",
1953                                         (unsigned long long)unit->fcp_lun,
1954                                         (unsigned long long)unit->port->wwpn);
1955                                 zfcp_erp_unit_failed(unit, "fsouh_7", req);
1956                                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1957                                 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1958                         }
1959                 }
1960                 break;
1961         }
1962 }
1963
1964 /**
1965  * zfcp_fsf_open_unit - open unit
1966  * @erp_action: pointer to struct zfcp_erp_action
1967  * Returns: 0 on success, error otherwise
1968  */
1969 int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1970 {
1971         struct qdio_buffer_element *sbale;
1972         struct zfcp_adapter *adapter = erp_action->adapter;
1973         struct zfcp_qdio *qdio = adapter->qdio;
1974         struct zfcp_fsf_req *req;
1975         int retval = -EIO;
1976
1977         spin_lock_bh(&qdio->req_q_lock);
1978         if (zfcp_fsf_req_sbal_get(qdio))
1979                 goto out;
1980
1981         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1982                                   adapter->pool.erp_req);
1983
1984         if (IS_ERR(req)) {
1985                 retval = PTR_ERR(req);
1986                 goto out;
1987         }
1988
1989         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1990         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1991         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1992         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1993
1994         req->qtcb->header.port_handle = erp_action->port->handle;
1995         req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1996         req->handler = zfcp_fsf_open_unit_handler;
1997         req->data = erp_action->unit;
1998         req->erp_action = erp_action;
1999         erp_action->fsf_req = req;
2000
2001         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2002                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2003
2004         zfcp_fsf_start_erp_timer(req);
2005         retval = zfcp_fsf_req_send(req);
2006         if (retval) {
2007                 zfcp_fsf_req_free(req);
2008                 erp_action->fsf_req = NULL;
2009         }
2010 out:
2011         spin_unlock_bh(&qdio->req_q_lock);
2012         return retval;
2013 }
2014
2015 static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
2016 {
2017         struct zfcp_unit *unit = req->data;
2018
2019         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2020                 return;
2021
2022         switch (req->qtcb->header.fsf_status) {
2023         case FSF_PORT_HANDLE_NOT_VALID:
2024                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
2025                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2026                 break;
2027         case FSF_LUN_HANDLE_NOT_VALID:
2028                 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
2029                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2030                 break;
2031         case FSF_PORT_BOXED:
2032                 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
2033                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2034                                ZFCP_STATUS_FSFREQ_RETRY;
2035                 break;
2036         case FSF_ADAPTER_STATUS_AVAILABLE:
2037                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2038                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2039                         zfcp_fc_test_link(unit->port);
2040                         /* fall through */
2041                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2042                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2043                         break;
2044                 }
2045                 break;
2046         case FSF_GOOD:
2047                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2048                 break;
2049         }
2050 }
2051
2052 /**
2053  * zfcp_fsf_close_unit - close zfcp unit
2054  * @erp_action: pointer to struct zfcp_unit
2055  * Returns: 0 on success, error otherwise
2056  */
2057 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2058 {
2059         struct qdio_buffer_element *sbale;
2060         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2061         struct zfcp_fsf_req *req;
2062         int retval = -EIO;
2063
2064         spin_lock_bh(&qdio->req_q_lock);
2065         if (zfcp_fsf_req_sbal_get(qdio))
2066                 goto out;
2067
2068         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2069                                   qdio->adapter->pool.erp_req);
2070
2071         if (IS_ERR(req)) {
2072                 retval = PTR_ERR(req);
2073                 goto out;
2074         }
2075
2076         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2077         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2078         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2079         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2080
2081         req->qtcb->header.port_handle = erp_action->port->handle;
2082         req->qtcb->header.lun_handle = erp_action->unit->handle;
2083         req->handler = zfcp_fsf_close_unit_handler;
2084         req->data = erp_action->unit;
2085         req->erp_action = erp_action;
2086         erp_action->fsf_req = req;
2087
2088         zfcp_fsf_start_erp_timer(req);
2089         retval = zfcp_fsf_req_send(req);
2090         if (retval) {
2091                 zfcp_fsf_req_free(req);
2092                 erp_action->fsf_req = NULL;
2093         }
2094 out:
2095         spin_unlock_bh(&qdio->req_q_lock);
2096         return retval;
2097 }
2098
2099 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2100 {
2101         lat_rec->sum += lat;
2102         lat_rec->min = min(lat_rec->min, lat);
2103         lat_rec->max = max(lat_rec->max, lat);
2104 }
2105
2106 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2107 {
2108         struct fsf_qual_latency_info *lat_in;
2109         struct latency_cont *lat = NULL;
2110         struct zfcp_unit *unit = req->unit;
2111         struct zfcp_blk_drv_data blktrc;
2112         int ticks = req->adapter->timer_ticks;
2113
2114         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2115
2116         blktrc.flags = 0;
2117         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2118         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2119                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2120         blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2121         blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2122
2123         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2124                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2125                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2126                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2127
2128                 switch (req->qtcb->bottom.io.data_direction) {
2129                 case FSF_DATADIR_READ:
2130                         lat = &unit->latencies.read;
2131                         break;
2132                 case FSF_DATADIR_WRITE:
2133                         lat = &unit->latencies.write;
2134                         break;
2135                 case FSF_DATADIR_CMND:
2136                         lat = &unit->latencies.cmd;
2137                         break;
2138                 }
2139
2140                 if (lat) {
2141                         spin_lock(&unit->latencies.lock);
2142                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2143                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2144                         lat->counter++;
2145                         spin_unlock(&unit->latencies.lock);
2146                 }
2147         }
2148
2149         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2150                             sizeof(blktrc));
2151 }
2152
2153 static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
2154 {
2155         struct scsi_cmnd *scpnt;
2156         struct fcp_resp_with_ext *fcp_rsp;
2157         unsigned long flags;
2158
2159         read_lock_irqsave(&req->adapter->abort_lock, flags);
2160
2161         scpnt = req->data;
2162         if (unlikely(!scpnt)) {
2163                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2164                 return;
2165         }
2166
2167         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
2168                 set_host_byte(scpnt, DID_SOFT_ERROR);
2169                 goto skip_fsfstatus;
2170         }
2171
2172         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2173                 set_host_byte(scpnt, DID_ERROR);
2174                 goto skip_fsfstatus;
2175         }
2176
2177         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2178         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2179
2180         zfcp_fsf_req_trace(req, scpnt);
2181
2182 skip_fsfstatus:
2183         if (scpnt->result != 0)
2184                 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
2185         else if (scpnt->retries > 0)
2186                 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
2187         else
2188                 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
2189
2190         scpnt->host_scribble = NULL;
2191         (scpnt->scsi_done) (scpnt);
2192         /*
2193          * We must hold this lock until scsi_done has been called.
2194          * Otherwise we may call scsi_done after abort regarding this
2195          * command has completed.
2196          * Note: scsi_done must not block!
2197          */
2198         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2199 }
2200
2201 static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
2202 {
2203         struct fcp_resp_with_ext *fcp_rsp;
2204         struct fcp_resp_rsp_info *rsp_info;
2205
2206         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2207         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2208
2209         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2210              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2211                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2212 }
2213
2214
2215 static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2216 {
2217         struct zfcp_unit *unit;
2218         struct fsf_qtcb_header *header = &req->qtcb->header;
2219
2220         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2221                 unit = req->data;
2222         else
2223                 unit = req->unit;
2224
2225         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2226                 goto skip_fsfstatus;
2227
2228         switch (header->fsf_status) {
2229         case FSF_HANDLE_MISMATCH:
2230         case FSF_PORT_HANDLE_NOT_VALID:
2231                 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
2232                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2233                 break;
2234         case FSF_FCPLUN_NOT_VALID:
2235         case FSF_LUN_HANDLE_NOT_VALID:
2236                 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
2237                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2238                 break;
2239         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2240                 zfcp_fsf_class_not_supp(req);
2241                 break;
2242         case FSF_ACCESS_DENIED:
2243                 zfcp_fsf_access_denied_unit(req, unit);
2244                 break;
2245         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2246                 dev_err(&req->adapter->ccw_device->dev,
2247                         "Incorrect direction %d, unit 0x%016Lx on port "
2248                         "0x%016Lx closed\n",
2249                         req->qtcb->bottom.io.data_direction,
2250                         (unsigned long long)unit->fcp_lun,
2251                         (unsigned long long)unit->port->wwpn);
2252                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2253                                           req);
2254                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2255                 break;
2256         case FSF_CMND_LENGTH_NOT_VALID:
2257                 dev_err(&req->adapter->ccw_device->dev,
2258                         "Incorrect CDB length %d, unit 0x%016Lx on "
2259                         "port 0x%016Lx closed\n",
2260                         req->qtcb->bottom.io.fcp_cmnd_length,
2261                         (unsigned long long)unit->fcp_lun,
2262                         (unsigned long long)unit->port->wwpn);
2263                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2264                                           req);
2265                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2266                 break;
2267         case FSF_PORT_BOXED:
2268                 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
2269                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2270                                ZFCP_STATUS_FSFREQ_RETRY;
2271                 break;
2272         case FSF_LUN_BOXED:
2273                 zfcp_erp_unit_boxed(unit, "fssfch6", req);
2274                 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2275                                ZFCP_STATUS_FSFREQ_RETRY;
2276                 break;
2277         case FSF_ADAPTER_STATUS_AVAILABLE:
2278                 if (header->fsf_status_qual.word[0] ==
2279                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2280                         zfcp_fc_test_link(unit->port);
2281                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2282                 break;
2283         }
2284 skip_fsfstatus:
2285         if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2286                 zfcp_fsf_send_fcp_ctm_handler(req);
2287         else {
2288                 zfcp_fsf_send_fcp_command_task_handler(req);
2289                 req->unit = NULL;
2290                 put_device(&unit->sysfs_device);
2291         }
2292 }
2293
2294 /**
2295  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2296  * @unit: unit where command is sent to
2297  * @scsi_cmnd: scsi command to be sent
2298  */
2299 int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2300                                    struct scsi_cmnd *scsi_cmnd)
2301 {
2302         struct zfcp_fsf_req *req;
2303         struct fcp_cmnd *fcp_cmnd;
2304         unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
2305         int real_bytes, retval = -EIO;
2306         struct zfcp_adapter *adapter = unit->port->adapter;
2307         struct zfcp_qdio *qdio = adapter->qdio;
2308
2309         if (unlikely(!(atomic_read(&unit->status) &
2310                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2311                 return -EBUSY;
2312
2313         spin_lock(&qdio->req_q_lock);
2314         if (atomic_read(&qdio->req_q.count) <= 0) {
2315                 atomic_inc(&qdio->req_q_full);
2316                 goto out;
2317         }
2318
2319         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2320                                   adapter->pool.scsi_req);
2321
2322         if (IS_ERR(req)) {
2323                 retval = PTR_ERR(req);
2324                 goto out;
2325         }
2326
2327         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2328         get_device(&unit->sysfs_device);
2329         req->unit = unit;
2330         req->data = scsi_cmnd;
2331         req->handler = zfcp_fsf_send_fcp_command_handler;
2332         req->qtcb->header.lun_handle = unit->handle;
2333         req->qtcb->header.port_handle = unit->port->handle;
2334         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2335         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2336
2337         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2338
2339         /*
2340          * set depending on data direction:
2341          *      data direction bits in SBALE (SB Type)
2342          *      data direction bits in QTCB
2343          */
2344         switch (scsi_cmnd->sc_data_direction) {
2345         case DMA_NONE:
2346                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2347                 break;
2348         case DMA_FROM_DEVICE:
2349                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2350                 break;
2351         case DMA_TO_DEVICE:
2352                 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2353                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2354                 break;
2355         case DMA_BIDIRECTIONAL:
2356                 goto failed_scsi_cmnd;
2357         }
2358
2359         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2360         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2361
2362         real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
2363                                              scsi_sglist(scsi_cmnd),
2364                                              FSF_MAX_SBALS_PER_REQ);
2365         if (unlikely(real_bytes < 0)) {
2366                 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
2367                         dev_err(&adapter->ccw_device->dev,
2368                                 "Oversize data package, unit 0x%016Lx "
2369                                 "on port 0x%016Lx closed\n",
2370                                 (unsigned long long)unit->fcp_lun,
2371                                 (unsigned long long)unit->port->wwpn);
2372                         zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
2373                         retval = -EINVAL;
2374                 }
2375                 goto failed_scsi_cmnd;
2376         }
2377
2378         retval = zfcp_fsf_req_send(req);
2379         if (unlikely(retval))
2380                 goto failed_scsi_cmnd;
2381
2382         goto out;
2383
2384 failed_scsi_cmnd:
2385         put_device(&unit->sysfs_device);
2386         zfcp_fsf_req_free(req);
2387         scsi_cmnd->host_scribble = NULL;
2388 out:
2389         spin_unlock(&qdio->req_q_lock);
2390         return retval;
2391 }
2392
2393 /**
2394  * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2395  * @unit: pointer to struct zfcp_unit
2396  * @tm_flags: unsigned byte for task management flags
2397  * Returns: on success pointer to struct fsf_req, NULL otherwise
2398  */
2399 struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
2400 {
2401         struct qdio_buffer_element *sbale;
2402         struct zfcp_fsf_req *req = NULL;
2403         struct fcp_cmnd *fcp_cmnd;
2404         struct zfcp_qdio *qdio = unit->port->adapter->qdio;
2405
2406         if (unlikely(!(atomic_read(&unit->status) &
2407                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2408                 return NULL;
2409
2410         spin_lock_bh(&qdio->req_q_lock);
2411         if (zfcp_fsf_req_sbal_get(qdio))
2412                 goto out;
2413
2414         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2415                                   qdio->adapter->pool.scsi_req);
2416
2417         if (IS_ERR(req)) {
2418                 req = NULL;
2419                 goto out;
2420         }
2421
2422         req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2423         req->data = unit;
2424         req->handler = zfcp_fsf_send_fcp_command_handler;
2425         req->qtcb->header.lun_handle = unit->handle;
2426         req->qtcb->header.port_handle = unit->port->handle;
2427         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2428         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2429         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2430
2431         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2432         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2433         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2434
2435         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2436         zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
2437
2438         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2439         if (!zfcp_fsf_req_send(req))
2440                 goto out;
2441
2442         zfcp_fsf_req_free(req);
2443         req = NULL;
2444 out:
2445         spin_unlock_bh(&qdio->req_q_lock);
2446         return req;
2447 }
2448
2449 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2450 {
2451 }
2452
2453 /**
2454  * zfcp_fsf_control_file - control file upload/download
2455  * @adapter: pointer to struct zfcp_adapter
2456  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2457  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2458  */
2459 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2460                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2461 {
2462         struct qdio_buffer_element *sbale;
2463         struct zfcp_qdio *qdio = adapter->qdio;
2464         struct zfcp_fsf_req *req = NULL;
2465         struct fsf_qtcb_bottom_support *bottom;
2466         int direction, retval = -EIO, bytes;
2467
2468         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2469                 return ERR_PTR(-EOPNOTSUPP);
2470
2471         switch (fsf_cfdc->command) {
2472         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2473                 direction = SBAL_FLAGS0_TYPE_WRITE;
2474                 break;
2475         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2476                 direction = SBAL_FLAGS0_TYPE_READ;
2477                 break;
2478         default:
2479                 return ERR_PTR(-EINVAL);
2480         }
2481
2482         spin_lock_bh(&qdio->req_q_lock);
2483         if (zfcp_fsf_req_sbal_get(qdio))
2484                 goto out;
2485
2486         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
2487         if (IS_ERR(req)) {
2488                 retval = -EPERM;
2489                 goto out;
2490         }
2491
2492         req->handler = zfcp_fsf_control_file_handler;
2493
2494         sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
2495         sbale[0].flags |= direction;
2496
2497         bottom = &req->qtcb->bottom.support;
2498         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2499         bottom->option = fsf_cfdc->option;
2500
2501         bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2502                                         direction, fsf_cfdc->sg,
2503                                         FSF_MAX_SBALS_PER_REQ);
2504         if (bytes != ZFCP_CFDC_MAX_SIZE) {
2505                 zfcp_fsf_req_free(req);
2506                 goto out;
2507         }
2508
2509         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2510         retval = zfcp_fsf_req_send(req);
2511 out:
2512         spin_unlock_bh(&qdio->req_q_lock);
2513
2514         if (!retval) {
2515                 wait_for_completion(&req->completion);
2516                 return req;
2517         }
2518         return ERR_PTR(retval);
2519 }
2520
2521 /**
2522  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2523  * @adapter: pointer to struct zfcp_adapter
2524  * @sbal_idx: response queue index of SBAL to be processed
2525  */
2526 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2527 {
2528         struct zfcp_adapter *adapter = qdio->adapter;
2529         struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
2530         struct qdio_buffer_element *sbale;
2531         struct zfcp_fsf_req *fsf_req;
2532         unsigned long flags, req_id;
2533         int idx;
2534
2535         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2536
2537                 sbale = &sbal->element[idx];
2538                 req_id = (unsigned long) sbale->addr;
2539                 spin_lock_irqsave(&adapter->req_list_lock, flags);
2540                 fsf_req = zfcp_reqlist_find(adapter, req_id);
2541
2542                 if (!fsf_req)
2543                         /*
2544                          * Unknown request means that we have potentially memory
2545                          * corruption and must stop the machine immediately.
2546                          */
2547                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2548                               req_id, dev_name(&adapter->ccw_device->dev));
2549
2550                 list_del(&fsf_req->list);
2551                 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2552
2553                 fsf_req->queue_req.sbal_response = sbal_idx;
2554                 fsf_req->queue_req.qdio_inb_usage =
2555                         atomic_read(&qdio->resp_q.count);
2556                 zfcp_fsf_req_complete(fsf_req);
2557
2558                 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2559                         break;
2560         }
2561 }