drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  *
   3  * linux/drivers/s390/scsi/zfcp_fsf.c
   4  *
   5  * FCP adapter driver for IBM eServer zSeries
   6  *
   7  * (C) Copyright IBM Corp. 2002, 2004
   8  *
   9  * Author(s): Martin Peschke <mpeschke@de.ibm.com>
  10  *            Raimund Schroeder <raimund.schroeder@de.ibm.com>
  11  *            Aron Zeh
  12  *            Wolfgang Taphorn
  13  *            Stefan Bader <stefan.bader@de.ibm.com>
  14  *            Heiko Carstens <heiko.carstens@de.ibm.com>
  15  *            Andreas Herrmann <aherrman@de.ibm.com>
  16  *            Volker Sameske <sameske@de.ibm.com>
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #define ZFCP_FSF_C_REVISION "$Revision: 1.92 $"
  34
  35 #include "zfcp_ext.h"
  36
  37 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
  38 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
  39 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
  40 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
  41 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
  42 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
  43 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
  44 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
  45 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
  46 static int zfcp_fsf_send_fcp_command_task_management_handler(
  47         struct zfcp_fsf_req *);
  48 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
  49 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
  50 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
  51 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
  52 static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
  53 static inline int zfcp_fsf_req_sbal_check(
  54         unsigned long *, struct zfcp_qdio_queue *, int);
  55 static inline int zfcp_use_one_sbal(
  56         struct scatterlist *, int, struct scatterlist *, int);
  57 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
  58 static int zfcp_fsf_req_send(struct zfcp_fsf_req *, struct timer_list *);
  59 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
  60 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
  61 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
  62 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
  63 static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
  64 static void zfcp_fsf_req_free(struct zfcp_fsf_req *);
  65
  66 /* association between FSF command and FSF QTCB type */
  67 static u32 fsf_qtcb_type[] = {
  68         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  69         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  70         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  71         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  72         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  73         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  74         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  75         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  76         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  77         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  78         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  79         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  80         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  81 };
  82
  83 static const char zfcp_act_subtable_type[5][8] = {
  84         "unknown", "OS", "WWPN", "DID", "LUN"
  85 };
  86
  87 /****************************************************************/
  88 /*************** FSF related Functions  *************************/
  89 /****************************************************************/
  90
  91 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_FSF
  92
  93 /*
  94  * function:    zfcp_fsf_req_alloc
  95  *
  96  * purpose:     Obtains an fsf_req and potentially a qtcb (for all but
  97  *              unsolicited requests) via helper functions
  98  *              Does some initial fsf request set-up.
  99  *
 100  * returns:     pointer to allocated fsf_req if successfull
 101  *              NULL otherwise
 102  *
 103  * locks:       none
 104  *
 105  */
 106 static struct zfcp_fsf_req *
 107 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
 108 {
 109         size_t size;
 110         void *ptr;
 111         struct zfcp_fsf_req *fsf_req = NULL;
 112
 113         if (req_flags & ZFCP_REQ_NO_QTCB)
 114                 size = sizeof(struct zfcp_fsf_req);
 115         else
 116                 size = sizeof(struct zfcp_fsf_req_pool_element);
 117
 118         if (likely(pool != NULL))
 119                 ptr = mempool_alloc(pool, GFP_ATOMIC);
 120         else
 121                 ptr = kmalloc(size, GFP_ATOMIC);
 122
 123         if (unlikely(NULL == ptr))
 124                 goto out;
 125
 126         memset(ptr, 0, size);
 127
 128         if (req_flags & ZFCP_REQ_NO_QTCB) {
 129                 fsf_req = (struct zfcp_fsf_req *) ptr;
 130         } else {
 131                 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req;
 132                 fsf_req->qtcb =
 133                         &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb;
 134         }
 135
 136         fsf_req->pool = pool;
 137
 138  out:
 139         return fsf_req;
 140 }
 141
 142 /*
 143  * function:    zfcp_fsf_req_free
 144  *
 145  * purpose:     Frees the memory of an fsf_req (and potentially a qtcb) or
 146  *              returns it into the pool via helper functions.
 147  *
 148  * returns:     sod all
 149  *
 150  * locks:       none
 151  */
 152 static void
 153 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
 154 {
 155         if (likely(fsf_req->pool != NULL))
 156                 mempool_free(fsf_req, fsf_req->pool);
 157                 else
 158                         kfree(fsf_req);
 159 }
 160
 161 /*
 162  * function:
 163  *
 164  * purpose:
 165  *
 166  * returns:
 167  *
 168  * note: qdio queues shall be down (no ongoing inbound processing)
 169  */
 170 int
 171 zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 172 {
 173         int retval = 0;
 174         struct zfcp_fsf_req *fsf_req, *tmp;
 175
 176         list_for_each_entry_safe(fsf_req, tmp, &adapter->fsf_req_list_head,
 177                                  list)
 178             zfcp_fsf_req_dismiss(fsf_req);
 179         /* wait_event_timeout? */
 180         while (!list_empty(&adapter->fsf_req_list_head)) {
 181                 ZFCP_LOG_DEBUG("fsf req list of adapter %s not yet empty\n",
 182                                zfcp_get_busid_by_adapter(adapter));
 183                 /* wait for woken intiators to clean up their requests */
 184                 msleep(jiffies_to_msecs(ZFCP_FSFREQ_CLEANUP_TIMEOUT));
 185         }
 186
 187         /* consistency check */
 188         if (atomic_read(&adapter->fsf_reqs_active)) {
 189                 ZFCP_LOG_NORMAL("bug: There are still %d FSF requests pending "
 190                                 "on adapter %s after cleanup.\n",
 191                                 atomic_read(&adapter->fsf_reqs_active),
 192                                 zfcp_get_busid_by_adapter(adapter));
 193                 atomic_set(&adapter->fsf_reqs_active, 0);
 194         }
 195
 196         return retval;
 197 }
 198
 199 /*
 200  * function:
 201  *
 202  * purpose:
 203  *
 204  * returns:
 205  */
 206 static void
 207 zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
 208 {
 209         fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 210         zfcp_fsf_req_complete(fsf_req);
 211 }
 212
 213 /*
 214  * function:    zfcp_fsf_req_complete
 215  *
 216  * purpose:     Updates active counts and timers for openfcp-reqs
 217  *              May cleanup request after req_eval returns
 218  *
 219  * returns:     0 - success
 220  *              !0 - failure
 221  *
 222  * context:
 223  */
 224 int
 225 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
 226 {
 227         int retval = 0;
 228         int cleanup;
 229         struct zfcp_adapter *adapter = fsf_req->adapter;
 230
 231         /* do some statistics */
 232         atomic_dec(&adapter->fsf_reqs_active);
 233
 234         if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 235                 ZFCP_LOG_DEBUG("Status read response received\n");
 236                 /*
 237                  * Note: all cleanup handling is done in the callchain of
 238                  * the function call-chain below.
 239                  */
 240                 zfcp_fsf_status_read_handler(fsf_req);
 241                 goto out;
 242         } else
 243                 zfcp_fsf_protstatus_eval(fsf_req);
 244
 245         /*
 246          * fsf_req may be deleted due to waking up functions, so
 247          * cleanup is saved here and used later
 248          */
 249         if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 250                 cleanup = 1;
 251         else
 252                 cleanup = 0;
 253
 254         fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
 255
 256         /* cleanup request if requested by initiator */
 257         if (likely(cleanup)) {
 258                 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
 259                 /*
 260                  * lock must not be held here since it will be
 261                  * grabed by the called routine, too
 262                  */
 263                 zfcp_fsf_req_cleanup(fsf_req);
 264         } else {
 265                 /* notify initiator waiting for the requests completion */
 266                 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
 267                 /*
 268                  * FIXME: Race! We must not access fsf_req here as it might have been
 269                  * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
 270                  * flag. It's an improbable case. But, we have the same paranoia for
 271                  * the cleanup flag already.
 272                  * Might better be handled using complete()?
 273                  * (setting the flag and doing wakeup ought to be atomic
 274                  *  with regard to checking the flag as long as waitqueue is
 275                  *  part of the to be released structure)
 276                  */
 277                 wake_up(&fsf_req->completion_wq);
 278         }
 279
 280  out:
 281         return retval;
 282 }
 283
 284 /*
 285  * function:    zfcp_fsf_protstatus_eval
 286  *
 287  * purpose:     evaluates the QTCB of the finished FSF request
 288  *              and initiates appropriate actions
 289  *              (usually calling FSF command specific handlers)
 290  *
 291  * returns:
 292  *
 293  * context:
 294  *
 295  * locks:
 296  */
 297 static int
 298 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
 299 {
 300         int retval = 0;
 301         struct zfcp_adapter *adapter = fsf_req->adapter;
 302
 303         ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb);
 304
 305         if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 306                 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
 307                                (unsigned long) fsf_req);
 308                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 309                         ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
 310                 zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0);
 311                 goto skip_protstatus;
 312         }
 313
 314         /* log additional information provided by FSF (if any) */
 315         if (unlikely(fsf_req->qtcb->header.log_length)) {
 316                 /* do not trust them ;-) */
 317                 if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
 318                         ZFCP_LOG_NORMAL
 319                             ("bug: ULP (FSF logging) log data starts "
 320                              "beyond end of packet header. Ignored. "
 321                              "(start=%i, size=%li)\n",
 322                              fsf_req->qtcb->header.log_start,
 323                              sizeof(struct fsf_qtcb));
 324                         goto forget_log;
 325                 }
 326                 if ((size_t) (fsf_req->qtcb->header.log_start +
 327                      fsf_req->qtcb->header.log_length)
 328                     > sizeof(struct fsf_qtcb)) {
 329                         ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
 330                                         "beyond end of packet header. Ignored. "
 331                                         "(start=%i, length=%i, size=%li)\n",
 332                                         fsf_req->qtcb->header.log_start,
 333                                         fsf_req->qtcb->header.log_length,
 334                                         sizeof(struct fsf_qtcb));
 335                         goto forget_log;
 336                 }
 337                 ZFCP_LOG_TRACE("ULP log data: \n");
 338                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
 339                               (char *) fsf_req->qtcb +
 340                               fsf_req->qtcb->header.log_start,
 341                               fsf_req->qtcb->header.log_length);
 342         }
 343  forget_log:
 344
 345         /* evaluate FSF Protocol Status */
 346         switch (fsf_req->qtcb->prefix.prot_status) {
 347
 348         case FSF_PROT_GOOD:
 349                 ZFCP_LOG_TRACE("FSF_PROT_GOOD\n");
 350                 break;
 351
 352         case FSF_PROT_FSF_STATUS_PRESENTED:
 353                 ZFCP_LOG_TRACE("FSF_PROT_FSF_STATUS_PRESENTED\n");
 354                 break;
 355
 356         case FSF_PROT_QTCB_VERSION_ERROR:
 357                 ZFCP_LOG_FLAGS(0, "FSF_PROT_QTCB_VERSION_ERROR\n");
 358                 ZFCP_LOG_NORMAL("error: The adapter %s contains "
 359                                 "microcode of version 0x%x, the device driver "
 360                                 "only supports 0x%x. Aborting.\n",
 361                                 zfcp_get_busid_by_adapter(adapter),
 362                                 fsf_req->qtcb->prefix.prot_status_qual.
 363                                 version_error.fsf_version, ZFCP_QTCB_VERSION);
 364                 /* stop operation for this adapter */
 365                 debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err");
 366                 zfcp_erp_adapter_shutdown(adapter, 0);
 367                 zfcp_cmd_dbf_event_fsf("qverserr", fsf_req,
 368                                        &fsf_req->qtcb->prefix.prot_status_qual,
 369                                        sizeof (union fsf_prot_status_qual));
 370                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 371                 break;
 372
 373         case FSF_PROT_SEQ_NUMB_ERROR:
 374                 ZFCP_LOG_FLAGS(0, "FSF_PROT_SEQ_NUMB_ERROR\n");
 375                 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
 376                                 "driver (0x%x) and adapter %s (0x%x). "
 377                                 "Restarting all operations on this adapter.\n",
 378                                 fsf_req->qtcb->prefix.req_seq_no,
 379                                 zfcp_get_busid_by_adapter(adapter),
 380                                 fsf_req->qtcb->prefix.prot_status_qual.
 381                                 sequence_error.exp_req_seq_no);
 382                 debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err");
 383                 /* restart operation on this adapter */
 384                 zfcp_erp_adapter_reopen(adapter, 0);
 385                 zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req,
 386                                        &fsf_req->qtcb->prefix.prot_status_qual,
 387                                        sizeof (union fsf_prot_status_qual));
 388                 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 389                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 390                 break;
 391
 392         case FSF_PROT_UNSUPP_QTCB_TYPE:
 393                 ZFCP_LOG_FLAGS(0, "FSF_PROT_UNSUP_QTCB_TYPE\n");
 394                 ZFCP_LOG_NORMAL("error: Packet header type used by the "
 395                                 "device driver is incompatible with "
 396                                 "that used on adapter %s. "
 397                                 "Stopping all operations on this adapter.\n",
 398                                 zfcp_get_busid_by_adapter(adapter));
 399                 debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb");
 400                 zfcp_erp_adapter_shutdown(adapter, 0);
 401                 zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req,
 402                                        &fsf_req->qtcb->prefix.prot_status_qual,
 403                                        sizeof (union fsf_prot_status_qual));
 404                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 405                 break;
 406
 407         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 408                 ZFCP_LOG_FLAGS(1, "FSF_PROT_HOST_CONNECTION_INITIALIZING\n");
 409                 zfcp_cmd_dbf_event_fsf("hconinit", fsf_req,
 410                                        &fsf_req->qtcb->prefix.prot_status_qual,
 411                                        sizeof (union fsf_prot_status_qual));
 412                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 413                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 414                                 &(adapter->status));
 415                 debug_text_event(adapter->erp_dbf, 3, "prot_con_init");
 416                 break;
 417
 418         case FSF_PROT_DUPLICATE_REQUEST_ID:
 419                 ZFCP_LOG_FLAGS(0, "FSF_PROT_DUPLICATE_REQUEST_IDS\n");
 420                 if (fsf_req->qtcb) {
 421                         ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
 422                                         "to the adapter %s is ambiguous. "
 423                                         "Stopping all operations on this "
 424                                         "adapter.\n",
 425                                         *(unsigned long long *)
 426                                         (&fsf_req->qtcb->bottom.support.
 427                                          req_handle),
 428                                         zfcp_get_busid_by_adapter(adapter));
 429                 } else {
 430                         ZFCP_LOG_NORMAL("bug: The request identifier %p "
 431                                         "to the adapter %s is ambiguous. "
 432                                         "Stopping all operations on this "
 433                                         "adapter. "
 434                                         "(bug: got this for an unsolicited "
 435                                         "status read request)\n",
 436                                         fsf_req,
 437                                         zfcp_get_busid_by_adapter(adapter));
 438                 }
 439                 debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id");
 440                 zfcp_erp_adapter_shutdown(adapter, 0);
 441                 zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req,
 442                                        &fsf_req->qtcb->prefix.prot_status_qual,
 443                                        sizeof (union fsf_prot_status_qual));
 444                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 445                 break;
 446
 447         case FSF_PROT_LINK_DOWN:
 448                 ZFCP_LOG_FLAGS(1, "FSF_PROT_LINK_DOWN\n");
 449                 /*
 450                  * 'test and set' is not atomic here -
 451                  * it's ok as long as calls to our response queue handler
 452                  * (and thus execution of this code here) are serialized
 453                  * by the qdio module
 454                  */
 455                 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
 456                                       &adapter->status)) {
 457                         switch (fsf_req->qtcb->prefix.prot_status_qual.
 458                                 locallink_error.code) {
 459                         case FSF_PSQ_LINK_NOLIGHT:
 460                                 ZFCP_LOG_INFO("The local link to adapter %s "
 461                                               "is down (no light detected).\n",
 462                                               zfcp_get_busid_by_adapter(
 463                                                       adapter));
 464                                 break;
 465                         case FSF_PSQ_LINK_WRAPPLUG:
 466                                 ZFCP_LOG_INFO("The local link to adapter %s "
 467                                               "is down (wrap plug detected).\n",
 468                                               zfcp_get_busid_by_adapter(
 469                                                       adapter));
 470                                 break;
 471                         case FSF_PSQ_LINK_NOFCP:
 472                                 ZFCP_LOG_INFO("The local link to adapter %s "
 473                                               "is down (adjacent node on "
 474                                               "link does not support FCP).\n",
 475                                               zfcp_get_busid_by_adapter(
 476                                                       adapter));
 477                                 break;
 478                         default:
 479                                 ZFCP_LOG_INFO("The local link to adapter %s "
 480                                               "is down "
 481                                               "(warning: unknown reason "
 482                                               "code).\n",
 483                                               zfcp_get_busid_by_adapter(
 484                                                       adapter));
 485                                 break;
 486
 487                         }
 488                         /*
 489                          * Due to the 'erp failed' flag the adapter won't
 490                          * be recovered but will be just set to 'blocked'
 491                          * state. All subordinary devices will have state
 492                          * 'blocked' and 'erp failed', too.
 493                          * Thus the adapter is still able to provide
 494                          * 'link up' status without being flooded with
 495                          * requests.
 496                          * (note: even 'close port' is not permitted)
 497                          */
 498                         ZFCP_LOG_INFO("Stopping all operations for adapter "
 499                                       "%s.\n",
 500                                       zfcp_get_busid_by_adapter(adapter));
 501                         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 502                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 503                                         &adapter->status);
 504                         zfcp_erp_adapter_reopen(adapter, 0);
 505                         debug_text_event(adapter->erp_dbf, 1, "prot_link_down");
 506                 }
 507                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 508                 break;
 509
 510         case FSF_PROT_REEST_QUEUE:
 511                 ZFCP_LOG_FLAGS(1, "FSF_PROT_REEST_QUEUE\n");
 512                 debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue");
 513                 ZFCP_LOG_INFO("The local link to adapter with "
 514                               "%s was re-plugged. "
 515                               "Re-starting operations on this adapter.\n",
 516                               zfcp_get_busid_by_adapter(adapter));
 517                 /* All ports should be marked as ready to run again */
 518                 zfcp_erp_modify_adapter_status(adapter,
 519                                                ZFCP_STATUS_COMMON_RUNNING,
 520                                                ZFCP_SET);
 521                 zfcp_erp_adapter_reopen(adapter,
 522                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
 523                                         | ZFCP_STATUS_COMMON_ERP_FAILED);
 524                 zfcp_cmd_dbf_event_fsf("reestque", fsf_req,
 525                                        &fsf_req->qtcb->prefix.prot_status_qual,
 526                                        sizeof (union fsf_prot_status_qual));
 527                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 528                 break;
 529
 530         case FSF_PROT_ERROR_STATE:
 531                 ZFCP_LOG_FLAGS(0, "FSF_PROT_ERROR_STATE\n");
 532                 ZFCP_LOG_NORMAL("error: The adapter %s "
 533                                 "has entered the error state. "
 534                                 "Restarting all operations on this "
 535                                 "adapter.\n",
 536                                 zfcp_get_busid_by_adapter(adapter));
 537                 debug_text_event(adapter->erp_dbf, 0, "prot_err_sta");
 538                 /* restart operation on this adapter */
 539                 zfcp_erp_adapter_reopen(adapter, 0);
 540                 zfcp_cmd_dbf_event_fsf("proterrs", fsf_req,
 541                                        &fsf_req->qtcb->prefix.prot_status_qual,
 542                                        sizeof (union fsf_prot_status_qual));
 543                 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 544                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 545                 break;
 546
 547         default:
 548                 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
 549                                 "provided by the adapter %s "
 550                                 "is not compatible with the device driver. "
 551                                 "Stopping all operations on this adapter. "
 552                                 "(debug info 0x%x).\n",
 553                                 zfcp_get_busid_by_adapter(adapter),
 554                                 fsf_req->qtcb->prefix.prot_status);
 555                 debug_text_event(adapter->erp_dbf, 0, "prot_inval:");
 556                 debug_exception(adapter->erp_dbf, 0,
 557                                 &fsf_req->qtcb->prefix.prot_status,
 558                                 sizeof (u32));
 559                 zfcp_erp_adapter_shutdown(adapter, 0);
 560                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 561         }
 562
 563  skip_protstatus:
 564         /*
 565          * always call specific handlers to give them a chance to do
 566          * something meaningful even in error cases
 567          */
 568         zfcp_fsf_fsfstatus_eval(fsf_req);
 569         return retval;
 570 }
 571
 572 /*
 573  * function:    zfcp_fsf_fsfstatus_eval
 574  *
 575  * purpose:     evaluates FSF status of completed FSF request
 576  *              and acts accordingly
 577  *
 578  * returns:
 579  */
 580 static int
 581 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
 582 {
 583         int retval = 0;
 584
 585         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
 586                 goto skip_fsfstatus;
 587         }
 588
 589         /* evaluate FSF Status */
 590         switch (fsf_req->qtcb->header.fsf_status) {
 591         case FSF_UNKNOWN_COMMAND:
 592                 ZFCP_LOG_FLAGS(0, "FSF_UNKNOWN_COMMAND\n");
 593                 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
 594                                 "not known by the adapter %s "
 595                                 "Stopping all operations on this adapter. "
 596                                 "(debug info 0x%x).\n",
 597                                 zfcp_get_busid_by_adapter(fsf_req->adapter),
 598                                 fsf_req->qtcb->header.fsf_command);
 599                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
 600                                      "fsf_s_unknown");
 601                 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
 602                 zfcp_cmd_dbf_event_fsf("unknownc", fsf_req,
 603                                        &fsf_req->qtcb->header.fsf_status_qual,
 604                                        sizeof (union fsf_status_qual));
 605                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 606                 break;
 607
 608         case FSF_FCP_RSP_AVAILABLE:
 609                 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
 610                 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
 611                                "SCSI stack.\n");
 612                 debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp");
 613                 break;
 614
 615         case FSF_ADAPTER_STATUS_AVAILABLE:
 616                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
 617                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus");
 618                 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
 619                 break;
 620
 621         default:
 622                 break;
 623         }
 624
 625  skip_fsfstatus:
 626         /*
 627          * always call specific handlers to give them a chance to do
 628          * something meaningful even in error cases
 629          */
 630         zfcp_fsf_req_dispatch(fsf_req);
 631
 632         return retval;
 633 }
 634
 635 /*
 636  * function:    zfcp_fsf_fsfstatus_qual_eval
 637  *
 638  * purpose:     evaluates FSF status-qualifier of completed FSF request
 639  *              and acts accordingly
 640  *
 641  * returns:
 642  */
 643 static int
 644 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
 645 {
 646         int retval = 0;
 647
 648         switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
 649         case FSF_SQ_FCP_RSP_AVAILABLE:
 650                 ZFCP_LOG_FLAGS(2, "FSF_SQ_FCP_RSP_AVAILABLE\n");
 651                 debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp");
 652                 break;
 653         case FSF_SQ_RETRY_IF_POSSIBLE:
 654                 ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
 655                 /* The SCSI-stack may now issue retries or escalate */
 656                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry");
 657                 zfcp_cmd_dbf_event_fsf("sqretry", fsf_req,
 658                                        &fsf_req->qtcb->header.fsf_status_qual,
 659                                        sizeof (union fsf_status_qual));
 660                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 661                 break;
 662         case FSF_SQ_COMMAND_ABORTED:
 663                 ZFCP_LOG_FLAGS(2, "FSF_SQ_COMMAND_ABORTED\n");
 664                 /* Carry the aborted state on to upper layer */
 665                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort");
 666                 zfcp_cmd_dbf_event_fsf("sqabort", fsf_req,
 667                                        &fsf_req->qtcb->header.fsf_status_qual,
 668                                        sizeof (union fsf_status_qual));
 669                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
 670                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 671                 break;
 672         case FSF_SQ_NO_RECOM:
 673                 ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RECOM\n");
 674                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
 675                                      "fsf_sq_no_rec");
 676                 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
 677                                 "problem on the adapter %s "
 678                                 "Stopping all operations on this adapter. ",
 679                                 zfcp_get_busid_by_adapter(fsf_req->adapter));
 680                 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
 681                 zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req,
 682                                        &fsf_req->qtcb->header.fsf_status_qual,
 683                                        sizeof (union fsf_status_qual));
 684                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 685                 break;
 686         case FSF_SQ_ULP_PROGRAMMING_ERROR:
 687                 ZFCP_LOG_FLAGS(0, "FSF_SQ_ULP_PROGRAMMING_ERROR\n");
 688                 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
 689                                 "(adapter %s)\n",
 690                                 zfcp_get_busid_by_adapter(fsf_req->adapter));
 691                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
 692                                      "fsf_sq_ulp_err");
 693                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 694                 break;
 695         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 696         case FSF_SQ_NO_RETRY_POSSIBLE:
 697         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 698                 /* dealt with in the respective functions */
 699                 break;
 700         default:
 701                 ZFCP_LOG_NORMAL("bug: Additional status info could "
 702                                 "not be interpreted properly.\n");
 703                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
 704                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
 705                               sizeof (union fsf_status_qual));
 706                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:");
 707                 debug_exception(fsf_req->adapter->erp_dbf, 0,
 708                                 &fsf_req->qtcb->header.fsf_status_qual.word[0],
 709                                 sizeof (u32));
 710                 zfcp_cmd_dbf_event_fsf("squndef", fsf_req,
 711                                        &fsf_req->qtcb->header.fsf_status_qual,
 712                                        sizeof (union fsf_status_qual));
 713                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 714                 break;
 715         }
 716
 717         return retval;
 718 }
 719
 720 /*
 721  * function:    zfcp_fsf_req_dispatch
 722  *
 723  * purpose:     calls the appropriate command specific handler
 724  *
 725  * returns:
 726  */
 727 static int
 728 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
 729 {
 730         struct zfcp_erp_action *erp_action = fsf_req->erp_action;
 731         struct zfcp_adapter *adapter = fsf_req->adapter;
 732         int retval = 0;
 733
 734         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
 735                 ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb);
 736                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
 737                               (char *) fsf_req->qtcb, sizeof(struct fsf_qtcb));
 738         }
 739
 740         switch (fsf_req->fsf_command) {
 741
 742         case FSF_QTCB_FCP_CMND:
 743                 ZFCP_LOG_FLAGS(3, "FSF_QTCB_FCP_CMND\n");
 744                 zfcp_fsf_send_fcp_command_handler(fsf_req);
 745                 break;
 746
 747         case FSF_QTCB_ABORT_FCP_CMND:
 748                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_ABORT_FCP_CMND\n");
 749                 zfcp_fsf_abort_fcp_command_handler(fsf_req);
 750                 break;
 751
 752         case FSF_QTCB_SEND_GENERIC:
 753                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_GENERIC\n");
 754                 zfcp_fsf_send_ct_handler(fsf_req);
 755                 break;
 756
 757         case FSF_QTCB_OPEN_PORT_WITH_DID:
 758                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_PORT_WITH_DID\n");
 759                 zfcp_fsf_open_port_handler(fsf_req);
 760                 break;
 761
 762         case FSF_QTCB_OPEN_LUN:
 763                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_LUN\n");
 764                 zfcp_fsf_open_unit_handler(fsf_req);
 765                 break;
 766
 767         case FSF_QTCB_CLOSE_LUN:
 768                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_LUN\n");
 769                 zfcp_fsf_close_unit_handler(fsf_req);
 770                 break;
 771
 772         case FSF_QTCB_CLOSE_PORT:
 773                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PORT\n");
 774                 zfcp_fsf_close_port_handler(fsf_req);
 775                 break;
 776
 777         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 778                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PHYSICAL_PORT\n");
 779                 zfcp_fsf_close_physical_port_handler(fsf_req);
 780                 break;
 781
 782         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 783                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_CONFIG_DATA\n");
 784                 zfcp_fsf_exchange_config_data_handler(fsf_req);
 785                 break;
 786
 787         case FSF_QTCB_EXCHANGE_PORT_DATA:
 788                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_PORT_DATA\n");
 789                 zfcp_fsf_exchange_port_data_handler(fsf_req);
 790                 break;
 791
 792         case FSF_QTCB_SEND_ELS:
 793                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_ELS\n");
 794                 zfcp_fsf_send_els_handler(fsf_req);
 795                 break;
 796
 797         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 798                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_DOWNLOAD_CONTROL_FILE\n");
 799                 zfcp_fsf_control_file_handler(fsf_req);
 800                 break;
 801
 802         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 803                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UPLOAD_CONTROL_FILE\n");
 804                 zfcp_fsf_control_file_handler(fsf_req);
 805                 break;
 806
 807         default:
 808                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UNKNOWN\n");
 809                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 810                 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
 811                                 "not supported by the adapter %s\n",
 812                                 zfcp_get_busid_by_adapter(fsf_req->adapter));
 813                 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
 814                         ZFCP_LOG_NORMAL
 815                             ("bug: Command issued by the device driver differs "
 816                              "from the command returned by the adapter %s "
 817                              "(debug info 0x%x, 0x%x).\n",
 818                              zfcp_get_busid_by_adapter(fsf_req->adapter),
 819                              fsf_req->fsf_command,
 820                              fsf_req->qtcb->header.fsf_command);
 821         }
 822
 823         if (!erp_action)
 824                 return retval;
 825
 826         debug_text_event(adapter->erp_dbf, 3, "a_frh");
 827         debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
 828         zfcp_erp_async_handler(erp_action, 0);
 829
 830         return retval;
 831 }
 832
 833 /*
 834  * function:    zfcp_fsf_status_read
 835  *
 836  * purpose:     initiates a Status Read command at the specified adapter
 837  *
 838  * returns:
 839  */
 840 int
 841 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
 842 {
 843         struct zfcp_fsf_req *fsf_req;
 844         struct fsf_status_read_buffer *status_buffer;
 845         unsigned long lock_flags;
 846         volatile struct qdio_buffer_element *sbale;
 847         int retval = 0;
 848
 849         /* setup new FSF request */
 850         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 851                                      req_flags | ZFCP_REQ_NO_QTCB,
 852                                      adapter->pool.fsf_req_status_read,
 853                                      &lock_flags, &fsf_req);
 854         if (retval < 0) {
 855                 ZFCP_LOG_INFO("error: Could not create unsolicited status "
 856                               "buffer for adapter %s.\n",
 857                               zfcp_get_busid_by_adapter(adapter));
 858                 goto failed_req_create;
 859         }
 860
 861         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
 862         sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
 863         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 864         fsf_req->sbale_curr = 2;
 865
 866         status_buffer =
 867                 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
 868         if (!status_buffer) {
 869                 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
 870                 goto failed_buf;
 871         }
 872         memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
 873         fsf_req->data.status_read.buffer = status_buffer;
 874
 875         /* insert pointer to respective buffer */
 876         sbale = zfcp_qdio_sbale_curr(fsf_req);
 877         sbale->addr = (void *) status_buffer;
 878         sbale->length = sizeof(struct fsf_status_read_buffer);
 879
 880         /* start QDIO request for this FSF request */
 881         retval = zfcp_fsf_req_send(fsf_req, NULL);
 882         if (retval) {
 883                 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
 884                                "environment.\n");
 885                 goto failed_req_send;
 886         }
 887
 888         ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
 889                        zfcp_get_busid_by_adapter(adapter));
 890         goto out;
 891
 892  failed_req_send:
 893         mempool_free(status_buffer, adapter->pool.data_status_read);
 894
 895  failed_buf:
 896         zfcp_fsf_req_free(fsf_req);
 897  failed_req_create:
 898  out:
 899         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
 900         return retval;
 901 }
 902
 903 static int
 904 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
 905 {
 906         struct fsf_status_read_buffer *status_buffer;
 907         struct zfcp_adapter *adapter;
 908         struct zfcp_port *port;
 909         unsigned long flags;
 910
 911         status_buffer = fsf_req->data.status_read.buffer;
 912         adapter = fsf_req->adapter;
 913
 914         read_lock_irqsave(&zfcp_data.config_lock, flags);
 915         list_for_each_entry(port, &adapter->port_list_head, list)
 916             if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
 917                 break;
 918         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 919
 920         if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
 921                 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
 922                                 "nonexisting port with d_id 0x%08x on "
 923                                 "adapter %s. Ignored.\n",
 924                                 status_buffer->d_id & ZFCP_DID_MASK,
 925                                 zfcp_get_busid_by_adapter(adapter));
 926                 goto out;
 927         }
 928
 929         switch (status_buffer->status_subtype) {
 930
 931         case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
 932                 ZFCP_LOG_FLAGS(2, "FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT\n");
 933                 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
 934                 zfcp_erp_port_reopen(port, 0);
 935                 break;
 936
 937         case FSF_STATUS_READ_SUB_ERROR_PORT:
 938                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SUB_ERROR_PORT\n");
 939                 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
 940                 zfcp_erp_port_shutdown(port, 0);
 941                 break;
 942
 943         default:
 944                 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
 945                 debug_exception(adapter->erp_dbf, 0,
 946                                 &status_buffer->status_subtype, sizeof (u32));
 947                 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
 948                                 "for a reopen indication on port with "
 949                                 "d_id 0x%08x on the adapter %s. "
 950                                 "Ignored. (debug info 0x%x)\n",
 951                                 status_buffer->d_id,
 952                                 zfcp_get_busid_by_adapter(adapter),
 953                                 status_buffer->status_subtype);
 954         }
 955  out:
 956         return 0;
 957 }
 958
 959 /*
 960  * function:    zfcp_fsf_status_read_handler
 961  *
 962  * purpose:     is called for finished Open Port command
 963  *
 964  * returns:
 965  */
 966 static int
 967 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
 968 {
 969         int retval = 0;
 970         struct zfcp_adapter *adapter = fsf_req->adapter;
 971         struct fsf_status_read_buffer *status_buffer =
 972             fsf_req->data.status_read.buffer;
 973
 974         if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 975                 mempool_free(status_buffer, adapter->pool.data_status_read);
 976                 zfcp_fsf_req_cleanup(fsf_req);
 977                 goto out;
 978         }
 979
 980         switch (status_buffer->status_type) {
 981
 982         case FSF_STATUS_READ_PORT_CLOSED:
 983                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_PORT_CLOSED\n");
 984                 debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:");
 985                 debug_event(adapter->erp_dbf, 3,
 986                             &status_buffer->d_id, sizeof (u32));
 987                 zfcp_fsf_status_read_port_closed(fsf_req);
 988                 break;
 989
 990         case FSF_STATUS_READ_INCOMING_ELS:
 991                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_INCOMING_ELS\n");
 992                 debug_text_event(adapter->erp_dbf, 3, "unsol_els:");
 993                 zfcp_fsf_incoming_els(fsf_req);
 994                 break;
 995
 996         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 997                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SENSE_DATA_AVAIL\n");
 998                 debug_text_event(adapter->erp_dbf, 3, "unsol_sense:");
 999                 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
1000                               zfcp_get_busid_by_adapter(adapter));
1001                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer,
1002                               sizeof(struct fsf_status_read_buffer));
1003                 break;
1004
1005         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
1006                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_BIT_ERROR_THRESHOLD\n");
1007                 debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:");
1008                 ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
1009                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
1010                               (char *) status_buffer,
1011                               sizeof (struct fsf_status_read_buffer));
1012                 break;
1013
1014         case FSF_STATUS_READ_LINK_DOWN:
1015                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_DOWN\n");
1016                 debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:");
1017                 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
1018                               zfcp_get_busid_by_adapter(adapter));
1019                 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
1020                                 &adapter->status);
1021                 zfcp_erp_adapter_failed(adapter);
1022                 break;
1023
1024         case FSF_STATUS_READ_LINK_UP:
1025                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_UP\n");
1026                 debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:");
1027                 ZFCP_LOG_INFO("Local link to adapter %s was replugged. "
1028                               "Restarting operations on this adapter\n",
1029                               zfcp_get_busid_by_adapter(adapter));
1030                 /* All ports should be marked as ready to run again */
1031                 zfcp_erp_modify_adapter_status(adapter,
1032                                                ZFCP_STATUS_COMMON_RUNNING,
1033                                                ZFCP_SET);
1034                 zfcp_erp_adapter_reopen(adapter,
1035                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
1036                                         | ZFCP_STATUS_COMMON_ERP_FAILED);
1037                 break;
1038
1039         case FSF_STATUS_READ_CFDC_UPDATED:
1040                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_UPDATED\n");
1041                 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:");
1042                 ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n",
1043                               zfcp_get_busid_by_adapter(adapter));
1044                 zfcp_erp_adapter_access_changed(adapter);
1045                 break;
1046
1047         case FSF_STATUS_READ_CFDC_HARDENED:
1048                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_HARDENED\n");
1049                 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:");
1050                 switch (status_buffer->status_subtype) {
1051                 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
1052                         ZFCP_LOG_INFO("CFDC of adapter %s saved on SE\n",
1053                                       zfcp_get_busid_by_adapter(adapter));
1054                         break;
1055                 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
1056                         ZFCP_LOG_INFO("CFDC of adapter %s has been copied "
1057                                       "to the secondary SE\n",
1058                                 zfcp_get_busid_by_adapter(adapter));
1059                         break;
1060                 default:
1061                         ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n",
1062                                       zfcp_get_busid_by_adapter(adapter));
1063                 }
1064                 break;
1065
1066         default:
1067                 debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:");
1068                 debug_exception(adapter->erp_dbf, 0,
1069                                 &status_buffer->status_type, sizeof (u32));
1070                 ZFCP_LOG_NORMAL("bug: An unsolicited status packet of unknown "
1071                                 "type was received (debug info 0x%x)\n",
1072                                 status_buffer->status_type);
1073                 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1074                                status_buffer);
1075                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1076                               (char *) status_buffer,
1077                               sizeof (struct fsf_status_read_buffer));
1078                 break;
1079         }
1080         mempool_free(status_buffer, adapter->pool.data_status_read);
1081         zfcp_fsf_req_cleanup(fsf_req);
1082         /*
1083          * recycle buffer and start new request repeat until outbound
1084          * queue is empty or adapter shutdown is requested
1085          */
1086         /*
1087          * FIXME(qdio):
1088          * we may wait in the req_create for 5s during shutdown, so
1089          * qdio_cleanup will have to wait at least that long before returning
1090          * with failure to allow us a proper cleanup under all circumstances
1091          */
1092         /*
1093          * FIXME:
1094          * allocation failure possible? (Is this code needed?)
1095          */
1096         retval = zfcp_fsf_status_read(adapter, 0);
1097         if (retval < 0) {
1098                 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1099                               "request for the adapter %s.\n",
1100                               zfcp_get_busid_by_adapter(adapter));
1101                 /* temporary fix to avoid status read buffer shortage */
1102                 adapter->status_read_failed++;
1103                 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1104                     < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1105                         ZFCP_LOG_INFO("restart adapter %s due to status read "
1106                                       "buffer shortage\n",
1107                                       zfcp_get_busid_by_adapter(adapter));
1108                         zfcp_erp_adapter_reopen(adapter, 0);
1109                 }
1110         }
1111  out:
1112         return retval;
1113 }
1114
1115 /*
1116  * function:    zfcp_fsf_abort_fcp_command
1117  *
1118  * purpose:     tells FSF to abort a running SCSI command
1119  *
1120  * returns:     address of initiated FSF request
1121  *              NULL - request could not be initiated
1122  *
1123  * FIXME(design): should be watched by a timeout !!!
1124  * FIXME(design) shouldn't this be modified to return an int
1125  *               also...don't know how though
1126  */
1127 struct zfcp_fsf_req *
1128 zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1129                            struct zfcp_adapter *adapter,
1130                            struct zfcp_unit *unit, int req_flags)
1131 {
1132         volatile struct qdio_buffer_element *sbale;
1133         unsigned long lock_flags;
1134         struct zfcp_fsf_req *fsf_req = NULL;
1135         int retval = 0;
1136
1137         /* setup new FSF request */
1138         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1139                                      req_flags, adapter->pool.fsf_req_abort,
1140                                      &lock_flags, &fsf_req);
1141         if (retval < 0) {
1142                 ZFCP_LOG_INFO("error: Failed to create an abort command "
1143                               "request for lun 0x%016Lx on port 0x%016Lx "
1144                               "on adapter %s.\n",
1145                               unit->fcp_lun,
1146                               unit->port->wwpn,
1147                               zfcp_get_busid_by_adapter(adapter));
1148                 goto out;
1149         }
1150
1151         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1152         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1153         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1154
1155         fsf_req->data.abort_fcp_command.unit = unit;
1156
1157         /* set handles of unit and its parent port in QTCB */
1158         fsf_req->qtcb->header.lun_handle = unit->handle;
1159         fsf_req->qtcb->header.port_handle = unit->port->handle;
1160
1161         /* set handle of request which should be aborted */
1162         fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1163
1164         /* start QDIO request for this FSF request */
1165
1166         zfcp_fsf_start_scsi_er_timer(adapter);
1167         retval = zfcp_fsf_req_send(fsf_req, NULL);
1168         if (retval) {
1169                 del_timer(&adapter->scsi_er_timer);
1170                 ZFCP_LOG_INFO("error: Failed to send abort command request "
1171                               "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1172                               zfcp_get_busid_by_adapter(adapter),
1173                               unit->port->wwpn, unit->fcp_lun);
1174                 zfcp_fsf_req_free(fsf_req);
1175                 fsf_req = NULL;
1176                 goto out;
1177         }
1178
1179         ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1180                        "(adapter%s, port d_id=0x%08x, "
1181                        "unit x%016Lx, old_req_id=0x%lx)\n",
1182                        zfcp_get_busid_by_adapter(adapter),
1183                        unit->port->d_id,
1184                        unit->fcp_lun, old_req_id);
1185  out:
1186         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1187         return fsf_req;
1188 }
1189
1190 /*
1191  * function:    zfcp_fsf_abort_fcp_command_handler
1192  *
1193  * purpose:     is called for finished Abort FCP Command request
1194  *
1195  * returns:
1196  */
1197 static int
1198 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1199 {
1200         int retval = -EINVAL;
1201         struct zfcp_unit *unit = new_fsf_req->data.abort_fcp_command.unit;
1202         unsigned char status_qual =
1203             new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1204
1205         del_timer(&new_fsf_req->adapter->scsi_er_timer);
1206
1207         if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1208                 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1209                 goto skip_fsfstatus;
1210         }
1211
1212         /* evaluate FSF status in QTCB */
1213         switch (new_fsf_req->qtcb->header.fsf_status) {
1214
1215         case FSF_PORT_HANDLE_NOT_VALID:
1216                 if (status_qual >> 4 != status_qual % 0xf) {
1217                         ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
1218                         debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1219                                          "fsf_s_phand_nv0");
1220                         /*
1221                          * In this case a command that was sent prior to a port
1222                          * reopen was aborted (handles are different). This is
1223                          * fine.
1224                          */
1225                 } else {
1226                         ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
1227                         ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1228                                       "port 0x%016Lx on adapter %s invalid. "
1229                                       "This may happen occasionally.\n",
1230                                       unit->port->handle,
1231                                       unit->port->wwpn,
1232                                       zfcp_get_busid_by_unit(unit));
1233                         ZFCP_LOG_INFO("status qualifier:\n");
1234                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1235                                       (char *) &new_fsf_req->qtcb->header.
1236                                       fsf_status_qual,
1237                                       sizeof (union fsf_status_qual));
1238                         /* Let's hope this sorts out the mess */
1239                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1240                                          "fsf_s_phand_nv1");
1241                         zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1242                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1243                 }
1244                 break;
1245
1246         case FSF_LUN_HANDLE_NOT_VALID:
1247                 if (status_qual >> 4 != status_qual % 0xf) {
1248                         /* 2 */
1249                         ZFCP_LOG_FLAGS(0, "FSF_LUN_HANDLE_NOT_VALID\n");
1250                         debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1251                                          "fsf_s_lhand_nv0");
1252                         /*
1253                          * In this case a command that was sent prior to a unit
1254                          * reopen was aborted (handles are different).
1255                          * This is fine.
1256                          */
1257                 } else {
1258                         ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
1259                         ZFCP_LOG_INFO
1260                             ("Warning: Temporary LUN identifier 0x%x of LUN "
1261                              "0x%016Lx on port 0x%016Lx on adapter %s is "
1262                              "invalid. This may happen in rare cases. "
1263                              "Trying to re-establish link.\n",
1264                              unit->handle,
1265                              unit->fcp_lun,
1266                              unit->port->wwpn,
1267                              zfcp_get_busid_by_unit(unit));
1268                         ZFCP_LOG_DEBUG("Status qualifier data:\n");
1269                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1270                                       (char *) &new_fsf_req->qtcb->header.
1271                                       fsf_status_qual,
1272                                       sizeof (union fsf_status_qual));
1273                         /* Let's hope this sorts out the mess */
1274                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1275                                          "fsf_s_lhand_nv1");
1276                         zfcp_erp_port_reopen(unit->port, 0);
1277                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1278                 }
1279                 break;
1280
1281         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1282                 ZFCP_LOG_FLAGS(2, "FSF_FCP_COMMAND_DOES_NOT_EXIST\n");
1283                 retval = 0;
1284                 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1285                                  "fsf_s_no_exist");
1286                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1287                 break;
1288
1289         case FSF_PORT_BOXED:
1290                 /* 2 */
1291                 ZFCP_LOG_FLAGS(0, "FSF_PORT_BOXED\n");
1292                 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1293                               "be reopened\n", unit->port->wwpn,
1294                               zfcp_get_busid_by_unit(unit));
1295                 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1296                                  "fsf_s_pboxed");
1297                 zfcp_erp_port_reopen(unit->port, 0);
1298                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1299                     | ZFCP_STATUS_FSFREQ_RETRY;
1300                 break;
1301
1302         case FSF_LUN_BOXED:
1303                 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
1304                 ZFCP_LOG_INFO(
1305                         "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1306                         "to be reopened\n",
1307                         unit->fcp_lun, unit->port->wwpn,
1308                         zfcp_get_busid_by_unit(unit));
1309                 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
1310                 zfcp_erp_unit_reopen(unit, 0);
1311                 zfcp_cmd_dbf_event_fsf("unitbox", new_fsf_req,
1312                         &new_fsf_req->qtcb->header.fsf_status_qual,
1313                         sizeof(union fsf_status_qual));
1314                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1315                         | ZFCP_STATUS_FSFREQ_RETRY;
1316                 break;
1317
1318         case FSF_ADAPTER_STATUS_AVAILABLE:
1319                 /* 2 */
1320                 ZFCP_LOG_FLAGS(0, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1321                 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1322                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1323                         ZFCP_LOG_FLAGS(2,
1324                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1325                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1326                                          "fsf_sq_ltest");
1327                         /* reopening link to port */
1328                         zfcp_erp_port_reopen(unit->port, 0);
1329                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1330                         break;
1331                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1332                         ZFCP_LOG_FLAGS(2,
1333                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1334                         /* SCSI stack will escalate */
1335                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1336                                          "fsf_sq_ulp");
1337                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1338                         break;
1339                 default:
1340                         ZFCP_LOG_NORMAL
1341                             ("bug: Wrong status qualifier 0x%x arrived.\n",
1342                              new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1343                         debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1344                                          "fsf_sq_inval:");
1345                         debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1346                                         &new_fsf_req->qtcb->header.
1347                                         fsf_status_qual.word[0], sizeof (u32));
1348                         break;
1349                 }
1350                 break;
1351
1352         case FSF_GOOD:
1353                 /* 3 */
1354                 ZFCP_LOG_FLAGS(0, "FSF_GOOD\n");
1355                 retval = 0;
1356                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1357                 break;
1358
1359         default:
1360                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1361                                 "(debug info 0x%x)\n",
1362                                 new_fsf_req->qtcb->header.fsf_status);
1363                 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1364                                  "fsf_s_inval:");
1365                 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1366                                 &new_fsf_req->qtcb->header.fsf_status,
1367                                 sizeof (u32));
1368                 break;
1369         }
1370  skip_fsfstatus:
1371         return retval;
1372 }
1373
1374 /**
1375  * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1376  *      one SBALE
1377  * Two scatter-gather lists are passed, one for the reqeust and one for the
1378  * response.
1379  */
1380 static inline int
1381 zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1382                   struct scatterlist *resp, int resp_count)
1383 {
1384         return ((req_count == 1) &&
1385                 (resp_count == 1) &&
1386                 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1387                   PAGE_MASK) ==
1388                  ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1389                                    req[0].length - 1) & PAGE_MASK)) &&
1390                 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1391                   PAGE_MASK) ==
1392                  ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1393                                    resp[0].length - 1) & PAGE_MASK)));
1394 }
1395
1396 /**
1397  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1398  * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1399  *      the request
1400  * @pool: pointer to memory pool, if non-null this pool is used to allocate
1401  *      a struct zfcp_fsf_req
1402  * @erp_action: pointer to erp_action, if non-null the Generic Service request
1403  *      is sent within error recovery
1404  */
1405 int
1406 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1407                  struct zfcp_erp_action *erp_action)
1408 {
1409         volatile struct qdio_buffer_element *sbale;
1410         struct zfcp_port *port;
1411         struct zfcp_adapter *adapter;
1412         struct zfcp_fsf_req *fsf_req;
1413         unsigned long lock_flags;
1414         int bytes;
1415         int ret = 0;
1416
1417         port = ct->port;
1418         adapter = port->adapter;
1419
1420         ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1421                                   ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1422                                   pool, &lock_flags, &fsf_req);
1423         if (ret < 0) {
1424                 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1425                               "adapter: %s\n",
1426                               zfcp_get_busid_by_adapter(adapter));
1427                 goto failed_req;
1428         }
1429
1430         if (erp_action != NULL) {
1431                 erp_action->fsf_req = fsf_req;
1432                 fsf_req->erp_action = erp_action;
1433         }
1434
1435         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1436         if (zfcp_use_one_sbal(ct->req, ct->req_count,
1437                               ct->resp, ct->resp_count)){
1438                 /* both request buffer and response buffer
1439                    fit into one sbale each */
1440                 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1441                 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1442                 sbale[2].length = ct->req[0].length;
1443                 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1444                 sbale[3].length = ct->resp[0].length;
1445                 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1446         } else if (adapter->supported_features &
1447                    FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1448                 /* try to use chained SBALs */
1449                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1450                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1451                                                 ct->req, ct->req_count,
1452                                                 ZFCP_MAX_SBALS_PER_CT_REQ);
1453                 if (bytes <= 0) {
1454                         ZFCP_LOG_INFO("error: creation of CT request failed "
1455                                       "on adapter %s\n",
1456                                       zfcp_get_busid_by_adapter(adapter));
1457                         if (bytes == 0)
1458                                 ret = -ENOMEM;
1459                         else
1460                                 ret = bytes;
1461
1462                         goto failed_send;
1463                 }
1464                 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1465                 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1466                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1467                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1468                                                 ct->resp, ct->resp_count,
1469                                                 ZFCP_MAX_SBALS_PER_CT_REQ);
1470                 if (bytes <= 0) {
1471                         ZFCP_LOG_INFO("error: creation of CT request failed "
1472                                       "on adapter %s\n",
1473                                       zfcp_get_busid_by_adapter(adapter));
1474                         if (bytes == 0)
1475                                 ret = -ENOMEM;
1476                         else
1477                                 ret = bytes;
1478
1479                         goto failed_send;
1480                 }
1481                 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1482         } else {
1483                 /* reject send generic request */
1484                 ZFCP_LOG_INFO(
1485                         "error: microcode does not support chained SBALs,"
1486                         "CT request too big (adapter %s)\n",
1487                         zfcp_get_busid_by_adapter(adapter));
1488                 ret = -EOPNOTSUPP;
1489                 goto failed_send;
1490         }
1491
1492         /* settings in QTCB */
1493         fsf_req->qtcb->header.port_handle = port->handle;
1494         fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1495         fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1496         fsf_req->data.send_ct = ct;
1497
1498         /* start QDIO request for this FSF request */
1499         ret = zfcp_fsf_req_send(fsf_req, ct->timer);
1500         if (ret) {
1501                 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1502                                "(adapter %s, port 0x%016Lx)\n",
1503                                zfcp_get_busid_by_adapter(adapter), port->wwpn);
1504                 goto failed_send;
1505         }
1506
1507         ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1508                        zfcp_get_busid_by_adapter(adapter), port->wwpn);
1509         goto out;
1510
1511  failed_send:
1512         zfcp_fsf_req_free(fsf_req);
1513         if (erp_action != NULL) {
1514                 erp_action->fsf_req = NULL;
1515         }
1516  failed_req:
1517  out:
1518         write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1519                                 lock_flags);
1520         return ret;
1521 }
1522
1523 /**
1524  * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1525  * @fsf_req: pointer to struct zfcp_fsf_req
1526  *
1527  * Data specific for the Generic Service request is passed by
1528  * fsf_req->data.send_ct
1529  * Usually a specific handler for the request is called via
1530  * fsf_req->data.send_ct->handler at end of this function.
1531  */
1532 static int
1533 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1534 {
1535         struct zfcp_port *port;
1536         struct zfcp_adapter *adapter;
1537         struct zfcp_send_ct *send_ct;
1538         struct fsf_qtcb_header *header;
1539         struct fsf_qtcb_bottom_support *bottom;
1540         int retval = -EINVAL;
1541         u16 subtable, rule, counter;
1542
1543         adapter = fsf_req->adapter;
1544         send_ct = fsf_req->data.send_ct;
1545         port = send_ct->port;
1546         header = &fsf_req->qtcb->header;
1547         bottom = &fsf_req->qtcb->bottom.support;
1548
1549         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1550                 goto skip_fsfstatus;
1551
1552         /* evaluate FSF status in QTCB */
1553         switch (header->fsf_status) {
1554
1555         case FSF_GOOD:
1556                 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n");
1557                 retval = 0;
1558                 break;
1559
1560         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1561                 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
1562                 if (adapter->fc_service_class <= 3) {
1563                         ZFCP_LOG_INFO("error: adapter %s does not support fc "
1564                                       "class %d.\n",
1565                                       zfcp_get_busid_by_port(port),
1566                                       adapter->fc_service_class);
1567                 } else {
1568                         ZFCP_LOG_INFO("bug: The fibre channel class at the "
1569                                       "adapter %s is invalid. "
1570                                       "(debug info %d)\n",
1571                                       zfcp_get_busid_by_port(port),
1572                                       adapter->fc_service_class);
1573                 }
1574                 /* stop operation for this adapter */
1575                 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1576                 zfcp_erp_adapter_shutdown(adapter, 0);
1577                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1578                 break;
1579
1580         case FSF_ADAPTER_STATUS_AVAILABLE:
1581                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1582                 switch (header->fsf_status_qual.word[0]){
1583                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1584                         ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1585                         /* reopening link to port */
1586                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1587                         zfcp_test_link(port);
1588                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1589                         break;
1590                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1591                         ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1592                         /* ERP strategy will escalate */
1593                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1594                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1595                         break;
1596                 default:
1597                         ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1598                                       "arrived.\n",
1599                                       header->fsf_status_qual.word[0]);
1600                         break;
1601                 }
1602                 break;
1603
1604         case FSF_ACCESS_DENIED:
1605                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
1606                 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1607                                 "command (adapter %s, port d_id=0x%08x)\n",
1608                                 zfcp_get_busid_by_port(port), port->d_id);
1609                 for (counter = 0; counter < 2; counter++) {
1610                         subtable = header->fsf_status_qual.halfword[counter * 2];
1611                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1612                         switch (subtable) {
1613                         case FSF_SQ_CFDC_SUBTABLE_OS:
1614                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1615                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1616                         case FSF_SQ_CFDC_SUBTABLE_LUN:
1617                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1618                                         zfcp_act_subtable_type[subtable], rule);
1619                                 break;
1620                         }
1621                 }
1622                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1623                 zfcp_erp_port_access_denied(port);
1624                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1625                 break;
1626
1627         case FSF_GENERIC_COMMAND_REJECTED:
1628                 ZFCP_LOG_FLAGS(2, "FSF_GENERIC_COMMAND_REJECTED\n");
1629                 ZFCP_LOG_INFO("generic service command rejected "
1630                               "(adapter %s, port d_id=0x%08x)\n",
1631                               zfcp_get_busid_by_port(port), port->d_id);
1632                 ZFCP_LOG_INFO("status qualifier:\n");
1633                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1634                               (char *) &header->fsf_status_qual,
1635                               sizeof (union fsf_status_qual));
1636                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1637                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1638                 break;
1639
1640         case FSF_PORT_HANDLE_NOT_VALID:
1641                 ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
1642                 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1643                                "0x%016Lx on adapter %s invalid. This may "
1644                                "happen occasionally.\n", port->handle,
1645                                port->wwpn, zfcp_get_busid_by_port(port));
1646                 ZFCP_LOG_INFO("status qualifier:\n");
1647                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1648                               (char *) &header->fsf_status_qual,
1649                               sizeof (union fsf_status_qual));
1650                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1651                 zfcp_erp_adapter_reopen(adapter, 0);
1652                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1653                 break;
1654
1655         case FSF_PORT_BOXED:
1656                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
1657                 ZFCP_LOG_INFO("port needs to be reopened "
1658                               "(adapter %s, port d_id=0x%08x)\n",
1659                               zfcp_get_busid_by_port(port), port->d_id);
1660                 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
1661                 zfcp_erp_port_reopen(port, 0);
1662                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1663                     | ZFCP_STATUS_FSFREQ_RETRY;
1664                 break;
1665
1666         /* following states should never occure, all cases avoided
1667            in zfcp_fsf_send_ct - but who knows ... */
1668         case FSF_PAYLOAD_SIZE_MISMATCH:
1669                 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
1670                 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1671                               "req_buf_length=%d, resp_buf_length=%d)\n",
1672                               zfcp_get_busid_by_adapter(adapter),
1673                               bottom->req_buf_length, bottom->resp_buf_length);
1674                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1675                 break;
1676         case FSF_REQUEST_SIZE_TOO_LARGE:
1677                 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
1678                 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1679                               "req_buf_length=%d)\n",
1680                               zfcp_get_busid_by_adapter(adapter),
1681                               bottom->req_buf_length);
1682                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1683                 break;
1684         case FSF_RESPONSE_SIZE_TOO_LARGE:
1685                 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
1686                 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1687                               "resp_buf_length=%d)\n",
1688                               zfcp_get_busid_by_adapter(adapter),
1689                               bottom->resp_buf_length);
1690                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1691                 break;
1692         case FSF_SBAL_MISMATCH:
1693                 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n");
1694                 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1695                               "resp_buf_length=%d)\n",
1696                               zfcp_get_busid_by_adapter(adapter),
1697                               bottom->req_buf_length, bottom->resp_buf_length);
1698                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1699                 break;
1700
1701        default:
1702                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1703                                 "(debug info 0x%x)\n", header->fsf_status);
1704                 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1705                 debug_exception(adapter->erp_dbf, 0,
1706                                 &header->fsf_status_qual.word[0], sizeof (u32));
1707                 break;
1708         }
1709
1710 skip_fsfstatus:
1711         send_ct->status = retval;
1712
1713         if (send_ct->handler != NULL)
1714                 send_ct->handler(send_ct->handler_data);
1715
1716         return retval;
1717 }
1718
1719 /**
1720  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1721  * @els: pointer to struct zfcp_send_els which contains all needed data for
1722  *      the command.
1723  */
1724 int
1725 zfcp_fsf_send_els(struct zfcp_send_els *els)
1726 {
1727         volatile struct qdio_buffer_element *sbale;
1728         struct zfcp_fsf_req *fsf_req;
1729         fc_id_t d_id;
1730         struct zfcp_adapter *adapter;
1731         unsigned long lock_flags;
1732         int bytes;
1733         int ret = 0;
1734
1735         d_id = els->d_id;
1736         adapter = els->adapter;
1737
1738         ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1739                                   ZFCP_REQ_AUTO_CLEANUP,
1740                                   NULL, &lock_flags, &fsf_req);
1741         if (ret < 0) {
1742                 ZFCP_LOG_INFO("error: creation of ELS request failed "
1743                               "(adapter %s, port d_id: 0x%08x)\n",
1744                               zfcp_get_busid_by_adapter(adapter), d_id);
1745                 goto failed_req;
1746         }
1747
1748         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1749         if (zfcp_use_one_sbal(els->req, els->req_count,
1750                               els->resp, els->resp_count)){
1751                 /* both request buffer and response buffer
1752                    fit into one sbale each */
1753                 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1754                 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1755                 sbale[2].length = els->req[0].length;
1756                 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1757                 sbale[3].length = els->resp[0].length;
1758                 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1759         } else if (adapter->supported_features &
1760                    FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1761                 /* try to use chained SBALs */
1762                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1763                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1764                                                 els->req, els->req_count,
1765                                                 ZFCP_MAX_SBALS_PER_ELS_REQ);
1766                 if (bytes <= 0) {
1767                         ZFCP_LOG_INFO("error: creation of ELS request failed "
1768                                       "(adapter %s, port d_id: 0x%08x)\n",
1769                                       zfcp_get_busid_by_adapter(adapter), d_id);
1770                         if (bytes == 0) {
1771                                 ret = -ENOMEM;
1772                         } else {
1773                                 ret = bytes;
1774                         }
1775                         goto failed_send;
1776                 }
1777                 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1778                 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1779                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1780                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1781                                                 els->resp, els->resp_count,
1782                                                 ZFCP_MAX_SBALS_PER_ELS_REQ);
1783                 if (bytes <= 0) {
1784                         ZFCP_LOG_INFO("error: creation of ELS request failed "
1785                                       "(adapter %s, port d_id: 0x%08x)\n",
1786                                       zfcp_get_busid_by_adapter(adapter), d_id);
1787                         if (bytes == 0) {
1788                                 ret = -ENOMEM;
1789                         } else {
1790                                 ret = bytes;
1791                         }
1792                         goto failed_send;
1793                 }
1794                 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1795         } else {
1796                 /* reject request */
1797                 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1798                               ", ELS request too big (adapter %s, "
1799                               "port d_id: 0x%08x)\n",
1800                               zfcp_get_busid_by_adapter(adapter), d_id);
1801                 ret = -EOPNOTSUPP;
1802                 goto failed_send;
1803         }
1804
1805         /* settings in QTCB */
1806         fsf_req->qtcb->bottom.support.d_id = d_id;
1807         fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1808         fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1809         fsf_req->data.send_els = els;
1810
1811         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1812
1813         /* start QDIO request for this FSF request */
1814         ret = zfcp_fsf_req_send(fsf_req, els->timer);
1815         if (ret) {
1816                 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1817                                "(adapter %s, port d_id: 0x%08x)\n",
1818                                zfcp_get_busid_by_adapter(adapter), d_id);
1819                 goto failed_send;
1820         }
1821
1822         ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1823                        "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1824         goto out;
1825
1826  failed_send:
1827         zfcp_fsf_req_free(fsf_req);
1828
1829  failed_req:
1830  out:
1831         write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1832                                 lock_flags);
1833
1834         return ret;
1835 }
1836
1837 /**
1838  * zfcp_fsf_send_els_handler - handler for ELS commands
1839  * @fsf_req: pointer to struct zfcp_fsf_req
1840  *
1841  * Data specific for the ELS command is passed by
1842  * fsf_req->data.send_els
1843  * Usually a specific handler for the command is called via
1844  * fsf_req->data.send_els->handler at end of this function.
1845  */
1846 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1847 {
1848         struct zfcp_adapter *adapter;
1849         fc_id_t d_id;
1850         struct zfcp_port *port;
1851         struct fsf_qtcb_header *header;
1852         struct fsf_qtcb_bottom_support *bottom;
1853         struct zfcp_send_els *send_els;
1854         int retval = -EINVAL;
1855         u16 subtable, rule, counter;
1856
1857         send_els = fsf_req->data.send_els;
1858         adapter = send_els->adapter;
1859         d_id = send_els->d_id;
1860         header = &fsf_req->qtcb->header;
1861         bottom = &fsf_req->qtcb->bottom.support;
1862
1863         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1864                 goto skip_fsfstatus;
1865
1866         switch (header->fsf_status) {
1867
1868         case FSF_GOOD:
1869                 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
1870                 retval = 0;
1871                 break;
1872
1873         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1874                 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
1875                 if (adapter->fc_service_class <= 3) {
1876                         ZFCP_LOG_INFO("error: adapter %s does "
1877                                       "not support fibrechannel class %d.\n",
1878                                       zfcp_get_busid_by_adapter(adapter),
1879                                       adapter->fc_service_class);
1880                 } else {
1881                         ZFCP_LOG_INFO("bug: The fibrechannel class at "
1882                                       "adapter %s is invalid. "
1883                                       "(debug info %d)\n",
1884                                       zfcp_get_busid_by_adapter(adapter),
1885                                       adapter->fc_service_class);
1886                 }
1887                 /* stop operation for this adapter */
1888                 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1889                 zfcp_erp_adapter_shutdown(adapter, 0);
1890                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1891                 break;
1892
1893         case FSF_ADAPTER_STATUS_AVAILABLE:
1894                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1895                 switch (header->fsf_status_qual.word[0]){
1896                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1897                         ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1898                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1899                         if (send_els->ls_code != ZFCP_LS_ADISC) {
1900                                 read_lock(&zfcp_data.config_lock);
1901                                 port = zfcp_get_port_by_did(adapter, d_id);
1902                                 if (port)
1903                                         zfcp_test_link(port);
1904                                 read_unlock(&zfcp_data.config_lock);
1905                         }
1906                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1907                         break;
1908                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1909                         ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1910                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1911                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1912                         retval =
1913                           zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1914                                               (struct zfcp_ls_rjt_par *)
1915                                               &header->fsf_status_qual.word[2]);
1916                         break;
1917                 case FSF_SQ_RETRY_IF_POSSIBLE:
1918                         ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
1919                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1920                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1921                         break;
1922                 default:
1923                         ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1924                                       header->fsf_status_qual.word[0]);
1925                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1926                                 (char*)header->fsf_status_qual.word, 16);
1927                 }
1928                 break;
1929
1930         case FSF_ELS_COMMAND_REJECTED:
1931                 ZFCP_LOG_FLAGS(2, "FSF_ELS_COMMAND_REJECTED\n");
1932                 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1933                               "prohibited sending "
1934                               "(adapter: %s, port d_id: 0x%08x)\n",
1935                               zfcp_get_busid_by_adapter(adapter), d_id);
1936
1937                 break;
1938
1939         case FSF_PAYLOAD_SIZE_MISMATCH:
1940                 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
1941                 ZFCP_LOG_INFO(
1942                         "ELS request size and ELS response size must be either "
1943                         "both 0, or both greater than 0 "
1944                         "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1945                         zfcp_get_busid_by_adapter(adapter),
1946                         bottom->req_buf_length,
1947                         bottom->resp_buf_length);
1948                 break;
1949
1950         case FSF_REQUEST_SIZE_TOO_LARGE:
1951                 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
1952                 ZFCP_LOG_INFO(
1953                         "Length of the ELS request buffer, "
1954                         "specified in QTCB bottom, "
1955                         "exceeds the size of the buffers "
1956                         "that have been allocated for ELS request data "
1957                         "(adapter: %s, req_buf_length=%d)\n",
1958                         zfcp_get_busid_by_adapter(adapter),
1959                         bottom->req_buf_length);
1960                 break;
1961
1962         case FSF_RESPONSE_SIZE_TOO_LARGE:
1963                 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
1964                 ZFCP_LOG_INFO(
1965                         "Length of the ELS response buffer, "
1966                         "specified in QTCB bottom, "
1967                         "exceeds the size of the buffers "
1968                         "that have been allocated for ELS response data "
1969                         "(adapter: %s, resp_buf_length=%d)\n",
1970                         zfcp_get_busid_by_adapter(adapter),
1971                         bottom->resp_buf_length);
1972                 break;
1973
1974         case FSF_SBAL_MISMATCH:
1975                 /* should never occure, avoided in zfcp_fsf_send_els */
1976                 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n");
1977                 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1978                               "resp_buf_length=%d)\n",
1979                               zfcp_get_busid_by_adapter(adapter),
1980                               bottom->req_buf_length, bottom->resp_buf_length);
1981                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1982                 break;
1983
1984         case FSF_ACCESS_DENIED:
1985                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
1986                 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1987                                 "(adapter %s, port d_id=0x%08x)\n",
1988                                 zfcp_get_busid_by_adapter(adapter), d_id);
1989                 for (counter = 0; counter < 2; counter++) {
1990                         subtable = header->fsf_status_qual.halfword[counter * 2];
1991                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1992                         switch (subtable) {
1993                         case FSF_SQ_CFDC_SUBTABLE_OS:
1994                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1995                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1996                         case FSF_SQ_CFDC_SUBTABLE_LUN:
1997                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1998                                         zfcp_act_subtable_type[subtable], rule);
1999                                 break;
2000                         }
2001                 }
2002                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
2003                 read_lock(&zfcp_data.config_lock);
2004                 port = zfcp_get_port_by_did(adapter, d_id);
2005                 if (port != NULL)
2006                         zfcp_erp_port_access_denied(port);
2007                 read_unlock(&zfcp_data.config_lock);
2008                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2009                 break;
2010
2011         default:
2012                 ZFCP_LOG_NORMAL(
2013                         "bug: An unknown FSF Status was presented "
2014                         "(adapter: %s, fsf_status=0x%08x)\n",
2015                         zfcp_get_busid_by_adapter(adapter),
2016                         header->fsf_status);
2017                 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
2018                 debug_exception(adapter->erp_dbf, 0,
2019                         &header->fsf_status_qual.word[0], sizeof(u32));
2020                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2021                 break;
2022         }
2023
2024 skip_fsfstatus:
2025         send_els->status = retval;
2026
2027         if (send_els->handler != 0)
2028                 send_els->handler(send_els->handler_data);
2029
2030         return retval;
2031 }
2032
2033 /*
2034  * function:
2035  *
2036  * purpose:
2037  *
2038  * returns:     address of initiated FSF request
2039  *              NULL - request could not be initiated
2040  */
2041 int
2042 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
2043 {
2044         volatile struct qdio_buffer_element *sbale;
2045         unsigned long lock_flags;
2046         int retval = 0;
2047
2048         /* setup new FSF request */
2049         retval = zfcp_fsf_req_create(erp_action->adapter,
2050                                      FSF_QTCB_EXCHANGE_CONFIG_DATA,
2051                                      ZFCP_REQ_AUTO_CLEANUP,
2052                                      erp_action->adapter->pool.fsf_req_erp,
2053                                      &lock_flags, &(erp_action->fsf_req));
2054         if (retval < 0) {
2055                 ZFCP_LOG_INFO("error: Could not create exchange configuration "
2056                               "data request for adapter %s.\n",
2057                               zfcp_get_busid_by_adapter(erp_action->adapter));
2058                 goto out;
2059         }
2060
2061         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2062                                     erp_action->fsf_req->sbal_curr, 0);
2063         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2064         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2065
2066         erp_action->fsf_req->erp_action = erp_action;
2067         erp_action->fsf_req->qtcb->bottom.config.feature_selection =
2068                 (FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING);
2069
2070         /* start QDIO request for this FSF request */
2071         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2072         if (retval) {
2073                 ZFCP_LOG_INFO
2074                     ("error: Could not send exchange configuration data "
2075                      "command on the adapter %s\n",
2076                      zfcp_get_busid_by_adapter(erp_action->adapter));
2077                 zfcp_fsf_req_free(erp_action->fsf_req);
2078                 erp_action->fsf_req = NULL;
2079                 goto out;
2080         }
2081
2082         ZFCP_LOG_DEBUG("exchange configuration data request initiated "
2083                        "(adapter %s)\n",
2084                        zfcp_get_busid_by_adapter(erp_action->adapter));
2085
2086  out:
2087         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2088                                 lock_flags);
2089         return retval;
2090 }
2091
2092 /**
2093  * zfcp_fsf_exchange_config_evaluate
2094  * @fsf_req: fsf_req which belongs to xchg config data request
2095  * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
2096  *
2097  * returns: -EIO on error, 0 otherwise
2098  */
2099 static int
2100 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2101 {
2102         struct fsf_qtcb_bottom_config *bottom;
2103         struct zfcp_adapter *adapter = fsf_req->adapter;
2104
2105         bottom = &fsf_req->qtcb->bottom.config;
2106         ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
2107                        bottom->low_qtcb_version, bottom->high_qtcb_version);
2108         adapter->fsf_lic_version = bottom->lic_version;
2109         adapter->supported_features = bottom->supported_features;
2110         adapter->peer_wwpn = 0;
2111         adapter->peer_wwnn = 0;
2112         adapter->peer_d_id = 0;
2113
2114         if (xchg_ok) {
2115                 adapter->wwnn = bottom->nport_serv_param.wwnn;
2116                 adapter->wwpn = bottom->nport_serv_param.wwpn;
2117                 adapter->s_id = bottom->s_id & ZFCP_DID_MASK;
2118                 adapter->fc_topology = bottom->fc_topology;
2119                 adapter->fc_link_speed = bottom->fc_link_speed;
2120                 adapter->hydra_version = bottom->adapter_type;
2121         } else {
2122                 adapter->wwnn = 0;
2123                 adapter->wwpn = 0;
2124                 adapter->s_id = 0;
2125                 adapter->fc_topology = 0;
2126                 adapter->fc_link_speed = 0;
2127                 adapter->hydra_version = 0;
2128         }
2129
2130         if (adapter->fc_topology == FSF_TOPO_P2P) {
2131                 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
2132                 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
2133                 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
2134         }
2135
2136         if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){
2137                 adapter->hardware_version = bottom->hardware_version;
2138                 memcpy(adapter->serial_number, bottom->serial_number, 17);
2139                 EBCASC(adapter->serial_number, sizeof(adapter->serial_number));
2140         }
2141
2142         ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n"
2143                       "WWNN 0x%016Lx, "
2144                       "WWPN 0x%016Lx, "
2145                       "S_ID 0x%08x,\n"
2146                       "adapter version 0x%x, "
2147                       "LIC version 0x%x, "
2148                       "FC link speed %d Gb/s\n",
2149                       zfcp_get_busid_by_adapter(adapter),
2150                       adapter->wwnn,
2151                       adapter->wwpn,
2152                       (unsigned int) adapter->s_id,
2153                       adapter->hydra_version,
2154                       adapter->fsf_lic_version,
2155                       adapter->fc_link_speed);
2156         if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2157                 ZFCP_LOG_NORMAL("error: the adapter %s "
2158                                 "only supports newer control block "
2159                                 "versions in comparison to this device "
2160                                 "driver (try updated device driver)\n",
2161                                 zfcp_get_busid_by_adapter(adapter));
2162                 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2163                 zfcp_erp_adapter_shutdown(adapter, 0);
2164                 return -EIO;
2165         }
2166         if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2167                 ZFCP_LOG_NORMAL("error: the adapter %s "
2168                                 "only supports older control block "
2169                                 "versions than this device driver uses"
2170                                 "(consider a microcode upgrade)\n",
2171                                 zfcp_get_busid_by_adapter(adapter));
2172                 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2173                 zfcp_erp_adapter_shutdown(adapter, 0);
2174                 return -EIO;
2175         }
2176         return 0;
2177 }
2178
2179 /*
2180  * function:    zfcp_fsf_exchange_config_data_handler
2181  *
2182  * purpose:     is called for finished Exchange Configuration Data command
2183  *
2184  * returns:
2185  */
2186 static int
2187 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2188 {
2189         struct fsf_qtcb_bottom_config *bottom;
2190         struct zfcp_adapter *adapter = fsf_req->adapter;
2191
2192         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2193                 return -EIO;
2194
2195         switch (fsf_req->qtcb->header.fsf_status) {
2196
2197         case FSF_GOOD:
2198                 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
2199
2200                 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2201                         return -EIO;
2202
2203                 switch (adapter->fc_topology) {
2204                 case FSF_TOPO_P2P:
2205                         ZFCP_LOG_FLAGS(1, "FSF_TOPO_P2P\n");
2206                         ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
2207                                         "configuration detected at adapter %s\n"
2208                                         "Peer WWNN 0x%016llx, "
2209                                         "peer WWPN 0x%016llx, "
2210                                         "peer d_id 0x%06x\n",
2211                                         zfcp_get_busid_by_adapter(adapter),
2212                                         adapter->peer_wwnn,
2213                                         adapter->peer_wwpn,
2214                                         adapter->peer_d_id);
2215                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2216                                          "top-p-to-p");
2217                         break;
2218                 case FSF_TOPO_AL:
2219                         ZFCP_LOG_FLAGS(1, "FSF_TOPO_AL\n");
2220                         ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2221                                         "topology detected at adapter %s "
2222                                         "unsupported, shutting down adapter\n",
2223                                         zfcp_get_busid_by_adapter(adapter));
2224                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2225                                          "top-al");
2226                         zfcp_erp_adapter_shutdown(adapter, 0);
2227                         return -EIO;
2228                 case FSF_TOPO_FABRIC:
2229                         ZFCP_LOG_FLAGS(1, "FSF_TOPO_FABRIC\n");
2230                         ZFCP_LOG_INFO("Switched fabric fibrechannel "
2231                                       "network detected at adapter %s.\n",
2232                                       zfcp_get_busid_by_adapter(adapter));
2233                         break;
2234                 default:
2235                         ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2236                                         "reported by the exchange "
2237                                         "configuration command for "
2238                                         "the adapter %s is not "
2239                                         "of a type known to the zfcp "
2240                                         "driver, shutting down adapter\n",
2241                                         zfcp_get_busid_by_adapter(adapter));
2242                         adapter->fc_topology = FSF_TOPO_ERROR;
2243                         debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2244                                              "unknown-topo");
2245                         zfcp_erp_adapter_shutdown(adapter, 0);
2246                         return -EIO;
2247                 }
2248                 bottom = &fsf_req->qtcb->bottom.config;
2249                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2250                         ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2251                                         "allowed by the adapter %s "
2252                                         "is lower than the minimum "
2253                                         "required by the driver (%ld bytes).\n",
2254                                         bottom->max_qtcb_size,
2255                                         zfcp_get_busid_by_adapter(adapter),
2256                                         sizeof(struct fsf_qtcb));
2257                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2258                                          "qtcb-size");
2259                         debug_event(fsf_req->adapter->erp_dbf, 0,
2260                                     &bottom->max_qtcb_size, sizeof (u32));
2261                         zfcp_erp_adapter_shutdown(adapter, 0);
2262                         return -EIO;
2263                 }
2264                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2265                                 &adapter->status);
2266                 break;
2267         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2268                 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2269
2270                 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2271                         return -EIO;
2272
2273                 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
2274                               zfcp_get_busid_by_adapter(adapter));
2275                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
2276                                 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
2277                                 &adapter->status);
2278                 zfcp_erp_adapter_failed(adapter);
2279                 break;
2280         default:
2281                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2282                 debug_event(fsf_req->adapter->erp_dbf, 0,
2283                             &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2284                 zfcp_erp_adapter_shutdown(adapter, 0);
2285                 return -EIO;
2286         }
2287         return 0;
2288 }
2289
2290 /**
2291  * zfcp_fsf_exchange_port_data - request information about local port
2292  * @adapter: for which port data is requested
2293  * @data: response to exchange port data request
2294  */
2295 int
2296 zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter,
2297                             struct fsf_qtcb_bottom_port *data)
2298 {
2299         volatile struct qdio_buffer_element *sbale;
2300         int retval = 0;
2301         unsigned long lock_flags;
2302         struct zfcp_fsf_req *fsf_req;
2303         struct timer_list *timer;
2304
2305         if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){
2306                 ZFCP_LOG_INFO("error: exchange port data "
2307                               "command not supported by adapter %s\n",
2308                               zfcp_get_busid_by_adapter(adapter));
2309                 return -EOPNOTSUPP;
2310         }
2311
2312         timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
2313         if (!timer)
2314                 return -ENOMEM;
2315
2316         /* setup new FSF request */
2317         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2318                                      0, 0, &lock_flags, &fsf_req);
2319         if (retval < 0) {
2320                 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2321                               "exchange port data request for"
2322                               "the adapter %s.\n",
2323                               zfcp_get_busid_by_adapter(adapter));
2324                 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2325                                         lock_flags);
2326                 goto out;
2327         }
2328
2329         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2330         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2331         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2332
2333         fsf_req->data.port_data = data;
2334
2335         init_timer(timer);
2336         timer->function = zfcp_fsf_request_timeout_handler;
2337         timer->data = (unsigned long) adapter;
2338         timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2339
2340         retval = zfcp_fsf_req_send(fsf_req, timer);
2341         if (retval) {
2342                 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2343                               "command on the adapter %s\n",
2344                               zfcp_get_busid_by_adapter(adapter));
2345                 zfcp_fsf_req_free(fsf_req);
2346                 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2347                                         lock_flags);
2348                 goto out;
2349         }
2350
2351         ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n",
2352                        zfcp_get_busid_by_adapter(adapter));
2353
2354         write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2355                                 lock_flags);
2356
2357         wait_event(fsf_req->completion_wq,
2358                    fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2359         del_timer_sync(timer);
2360         zfcp_fsf_req_cleanup(fsf_req);
2361  out:
2362         kfree(timer);
2363         return retval;
2364 }
2365
2366
2367 /**
2368  * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2369  * @fsf_req: pointer to struct zfcp_fsf_req
2370  */
2371 static void
2372 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2373 {
2374         struct fsf_qtcb_bottom_port *bottom;
2375         struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data;
2376
2377         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2378                 return;
2379
2380         switch (fsf_req->qtcb->header.fsf_status) {
2381         case FSF_GOOD:
2382                 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n");
2383                 bottom = &fsf_req->qtcb->bottom.port;
2384                 memcpy(data, bottom, sizeof(*data));
2385                 break;
2386
2387         default:
2388                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng");
2389                 debug_event(fsf_req->adapter->erp_dbf, 0,
2390                             &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2391         }
2392 }
2393
2394
2395 /*
2396  * function:    zfcp_fsf_open_port
2397  *
2398  * purpose:
2399  *
2400  * returns:     address of initiated FSF request
2401  *              NULL - request could not be initiated
2402  */
2403 int
2404 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2405 {
2406         volatile struct qdio_buffer_element *sbale;
2407         unsigned long lock_flags;
2408         int retval = 0;
2409
2410         /* setup new FSF request */
2411         retval = zfcp_fsf_req_create(erp_action->adapter,
2412                                      FSF_QTCB_OPEN_PORT_WITH_DID,
2413                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2414                                      erp_action->adapter->pool.fsf_req_erp,
2415                                      &lock_flags, &(erp_action->fsf_req));
2416         if (retval < 0) {
2417                 ZFCP_LOG_INFO("error: Could not create open port request "
2418                               "for port 0x%016Lx on adapter %s.\n",
2419                               erp_action->port->wwpn,
2420                               zfcp_get_busid_by_adapter(erp_action->adapter));
2421                 goto out;
2422         }
2423
2424         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2425                                     erp_action->fsf_req->sbal_curr, 0);
2426         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2427         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2428
2429         erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2430         atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2431         erp_action->fsf_req->data.open_port.port = erp_action->port;
2432         erp_action->fsf_req->erp_action = erp_action;
2433
2434         /* start QDIO request for this FSF request */
2435         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2436         if (retval) {
2437                 ZFCP_LOG_INFO("error: Could not send open port request for "
2438                               "port 0x%016Lx on adapter %s.\n",
2439                               erp_action->port->wwpn,
2440                               zfcp_get_busid_by_adapter(erp_action->adapter));
2441                 zfcp_fsf_req_free(erp_action->fsf_req);
2442                 erp_action->fsf_req = NULL;
2443                 goto out;
2444         }
2445
2446         ZFCP_LOG_DEBUG("open port request initiated "
2447                        "(adapter %s,  port 0x%016Lx)\n",
2448                        zfcp_get_busid_by_adapter(erp_action->adapter),
2449                        erp_action->port->wwpn);
2450  out:
2451         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2452                                 lock_flags);
2453         return retval;
2454 }
2455
2456 /*
2457  * function:    zfcp_fsf_open_port_handler
2458  *
2459  * purpose:     is called for finished Open Port command
2460  *
2461  * returns:
2462  */
2463 static int
2464 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2465 {
2466         int retval = -EINVAL;
2467         struct zfcp_port *port;
2468         struct fsf_plogi *plogi;
2469         struct fsf_qtcb_header *header;
2470         u16 subtable, rule, counter;
2471
2472         port = fsf_req->data.open_port.port;
2473         header = &fsf_req->qtcb->header;
2474
2475         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2476                 /* don't change port status in our bookkeeping */
2477                 goto skip_fsfstatus;
2478         }
2479
2480         /* evaluate FSF status in QTCB */
2481         switch (header->fsf_status) {
2482
2483         case FSF_PORT_ALREADY_OPEN:
2484                 ZFCP_LOG_FLAGS(0, "FSF_PORT_ALREADY_OPEN\n");
2485                 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2486                                 "is already open.\n",
2487                                 port->wwpn, zfcp_get_busid_by_port(port));
2488                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2489                                      "fsf_s_popen");
2490                 /*
2491                  * This is a bug, however operation should continue normally
2492                  * if it is simply ignored
2493                  */
2494                 break;
2495
2496         case FSF_ACCESS_DENIED:
2497                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
2498                 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2499                                 "on adapter %s\n",
2500                                 port->wwpn, zfcp_get_busid_by_port(port));
2501                 for (counter = 0; counter < 2; counter++) {
2502                         subtable = header->fsf_status_qual.halfword[counter * 2];
2503                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2504                         switch (subtable) {
2505                         case FSF_SQ_CFDC_SUBTABLE_OS:
2506                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2507                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2508                         case FSF_SQ_CFDC_SUBTABLE_LUN:
2509                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2510                                         zfcp_act_subtable_type[subtable], rule);
2511                                 break;
2512                         }
2513                 }
2514                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2515                 zfcp_erp_port_access_denied(port);
2516                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2517                 break;
2518
2519         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2520                 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED\n");
2521                 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2522                               "The remote port 0x%016Lx on adapter %s "
2523                               "could not be opened. Disabling it.\n",
2524                               port->wwpn, zfcp_get_busid_by_port(port));
2525                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2526                                  "fsf_s_max_ports");
2527                 zfcp_erp_port_failed(port);
2528                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2529                 break;
2530
2531         case FSF_ADAPTER_STATUS_AVAILABLE:
2532                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2533                 switch (header->fsf_status_qual.word[0]) {
2534                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2535                         ZFCP_LOG_FLAGS(2,
2536                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
2537                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2538                                          "fsf_sq_ltest");
2539                         /* ERP strategy will escalate */
2540                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2541                         break;
2542                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2543                         /* ERP strategy will escalate */
2544                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2545                                          "fsf_sq_ulp");
2546                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2547                         break;
2548                 case FSF_SQ_NO_RETRY_POSSIBLE:
2549                         ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RETRY_POSSIBLE\n");
2550                         ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2551                                         "adapter %s could not be opened. "
2552                                         "Disabling it.\n",
2553                                         port->wwpn,
2554                                         zfcp_get_busid_by_port(port));
2555                         debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2556                                              "fsf_sq_no_retry");
2557                         zfcp_erp_port_failed(port);
2558                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2559                         break;
2560                 default:
2561                         ZFCP_LOG_NORMAL
2562                             ("bug: Wrong status qualifier 0x%x arrived.\n",
2563                              header->fsf_status_qual.word[0]);
2564                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2565                                          "fsf_sq_inval:");
2566                         debug_exception(
2567                                 fsf_req->adapter->erp_dbf, 0,
2568                                 &header->fsf_status_qual.word[0],
2569                                 sizeof (u32));
2570                         break;
2571                 }
2572                 break;
2573
2574         case FSF_GOOD:
2575                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2576                 /* save port handle assigned by FSF */
2577                 port->handle = header->port_handle;
2578                 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2579                               "was opened, it's port handle is 0x%x\n",
2580                               port->wwpn, zfcp_get_busid_by_port(port),
2581                               port->handle);
2582                 /* mark port as open */
2583                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2584                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2585                 retval = 0;
2586                 /* check whether D_ID has changed during open */
2587                 /*
2588                  * FIXME: This check is not airtight, as the FCP channel does
2589                  * not monitor closures of target port connections caused on
2590                  * the remote side. Thus, they might miss out on invalidating
2591                  * locally cached WWPNs (and other N_Port parameters) of gone
2592                  * target ports. So, our heroic attempt to make things safe
2593                  * could be undermined by 'open port' response data tagged with
2594                  * obsolete WWPNs. Another reason to monitor potential
2595                  * connection closures ourself at least (by interpreting
2596                  * incoming ELS' and unsolicited status). It just crosses my
2597                  * mind that one should be able to cross-check by means of
2598                  * another GID_PN straight after a port has been opened.
2599                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
2600                  */
2601                 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2602                 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2603                 {
2604                         if (fsf_req->qtcb->bottom.support.els1_length <
2605                             ((((unsigned long) &plogi->serv_param.wwpn) -
2606                               ((unsigned long) plogi)) + sizeof (u64))) {
2607                                 ZFCP_LOG_INFO(
2608                                         "warning: insufficient length of "
2609                                         "PLOGI payload (%i)\n",
2610                                         fsf_req->qtcb->bottom.support.els1_length);
2611                                 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2612                                                  "fsf_s_short_plogi:");
2613                                 /* skip sanity check and assume wwpn is ok */
2614                         } else {
2615                                 if (plogi->serv_param.wwpn != port->wwpn) {
2616                                         ZFCP_LOG_INFO("warning: d_id of port "
2617                                                       "0x%016Lx changed during "
2618                                                       "open\n", port->wwpn);
2619                                         debug_text_event(
2620                                                 fsf_req->adapter->erp_dbf, 0,
2621                                                 "fsf_s_did_change:");
2622                                         atomic_clear_mask(
2623                                                 ZFCP_STATUS_PORT_DID_DID,
2624                                                 &port->status);
2625                                 } else
2626                                         port->wwnn = plogi->serv_param.wwnn;
2627                         }
2628                 }
2629                 break;
2630
2631         case FSF_UNKNOWN_OP_SUBTYPE:
2632                 /* should never occure, subtype not set in zfcp_fsf_open_port */
2633                 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
2634                 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2635                               "op_subtype=0x%x)\n",
2636                               zfcp_get_busid_by_port(port),
2637                               fsf_req->qtcb->bottom.support.operation_subtype);
2638                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2639                 break;
2640
2641         default:
2642                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2643                                 "(debug info 0x%x)\n",
2644                                 header->fsf_status);
2645                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2646                 debug_exception(fsf_req->adapter->erp_dbf, 0,
2647                                 &header->fsf_status, sizeof (u32));
2648                 break;
2649         }
2650
2651  skip_fsfstatus:
2652         atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2653         return retval;
2654 }
2655
2656 /*
2657  * function:    zfcp_fsf_close_port
2658  *
2659  * purpose:     submit FSF command "close port"
2660  *
2661  * returns:     address of initiated FSF request
2662  *              NULL - request could not be initiated
2663  */
2664 int
2665 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2666 {
2667         volatile struct qdio_buffer_element *sbale;
2668         unsigned long lock_flags;
2669         int retval = 0;
2670
2671         /* setup new FSF request */
2672         retval = zfcp_fsf_req_create(erp_action->adapter,
2673                                      FSF_QTCB_CLOSE_PORT,
2674                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2675                                      erp_action->adapter->pool.fsf_req_erp,
2676                                      &lock_flags, &(erp_action->fsf_req));
2677         if (retval < 0) {
2678                 ZFCP_LOG_INFO("error: Could not create a close port request "
2679                               "for port 0x%016Lx on adapter %s.\n",
2680                               erp_action->port->wwpn,
2681                               zfcp_get_busid_by_adapter(erp_action->adapter));
2682                 goto out;
2683         }
2684
2685         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2686                                     erp_action->fsf_req->sbal_curr, 0);
2687         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2688         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2689
2690         atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2691         erp_action->fsf_req->data.close_port.port = erp_action->port;
2692         erp_action->fsf_req->erp_action = erp_action;
2693         erp_action->fsf_req->qtcb->header.port_handle =
2694             erp_action->port->handle;
2695
2696         /* start QDIO request for this FSF request */
2697         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2698         if (retval) {
2699                 ZFCP_LOG_INFO("error: Could not send a close port request for "
2700                               "port 0x%016Lx on adapter %s.\n",
2701                               erp_action->port->wwpn,
2702                               zfcp_get_busid_by_adapter(erp_action->adapter));
2703                 zfcp_fsf_req_free(erp_action->fsf_req);
2704                 erp_action->fsf_req = NULL;
2705                 goto out;
2706         }
2707
2708         ZFCP_LOG_TRACE("close port request initiated "
2709                        "(adapter %s, port 0x%016Lx)\n",
2710                        zfcp_get_busid_by_adapter(erp_action->adapter),
2711                        erp_action->port->wwpn);
2712  out:
2713         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2714                                 lock_flags);
2715         return retval;
2716 }
2717
2718 /*
2719  * function:    zfcp_fsf_close_port_handler
2720  *
2721  * purpose:     is called for finished Close Port FSF command
2722  *
2723  * returns:
2724  */
2725 static int
2726 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2727 {
2728         int retval = -EINVAL;
2729         struct zfcp_port *port;
2730
2731         port = fsf_req->data.close_port.port;
2732
2733         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2734                 /* don't change port status in our bookkeeping */
2735                 goto skip_fsfstatus;
2736         }
2737
2738         /* evaluate FSF status in QTCB */
2739         switch (fsf_req->qtcb->header.fsf_status) {
2740
2741         case FSF_PORT_HANDLE_NOT_VALID:
2742                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
2743                 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2744                               "0x%016Lx on adapter %s invalid. This may happen "
2745                               "occasionally.\n", port->handle,
2746                               port->wwpn, zfcp_get_busid_by_port(port));
2747                 ZFCP_LOG_DEBUG("status qualifier:\n");
2748                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2749                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
2750                               sizeof (union fsf_status_qual));
2751                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2752                                  "fsf_s_phand_nv");
2753                 zfcp_erp_adapter_reopen(port->adapter, 0);
2754                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2755                 break;
2756
2757         case FSF_ADAPTER_STATUS_AVAILABLE:
2758                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2759                 /* Note: FSF has actually closed the port in this case.
2760                  * The status code is just daft. Fingers crossed for a change
2761                  */
2762                 retval = 0;
2763                 break;
2764
2765         case FSF_GOOD:
2766                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2767                 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2768                                "port handle 0x%x\n", port->wwpn,
2769                                zfcp_get_busid_by_port(port), port->handle);
2770                 zfcp_erp_modify_port_status(port,
2771                                             ZFCP_STATUS_COMMON_OPEN,
2772                                             ZFCP_CLEAR);
2773                 retval = 0;
2774                 break;
2775
2776         default:
2777                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2778                                 "(debug info 0x%x)\n",
2779                                 fsf_req->qtcb->header.fsf_status);
2780                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2781                 debug_exception(fsf_req->adapter->erp_dbf, 0,
2782                                 &fsf_req->qtcb->header.fsf_status,
2783                                 sizeof (u32));
2784                 break;
2785         }
2786
2787  skip_fsfstatus:
2788         atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2789         return retval;
2790 }
2791
2792 /*
2793  * function:    zfcp_fsf_close_physical_port
2794  *
2795  * purpose:     submit FSF command "close physical port"
2796  *
2797  * returns:     address of initiated FSF request
2798  *              NULL - request could not be initiated
2799  */
2800 int
2801 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2802 {
2803         int retval = 0;
2804         unsigned long lock_flags;
2805         volatile struct qdio_buffer_element *sbale;
2806
2807         /* setup new FSF request */
2808         retval = zfcp_fsf_req_create(erp_action->adapter,
2809                                      FSF_QTCB_CLOSE_PHYSICAL_PORT,
2810                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2811                                      erp_action->adapter->pool.fsf_req_erp,
2812                                      &lock_flags, &erp_action->fsf_req);
2813         if (retval < 0) {
2814                 ZFCP_LOG_INFO("error: Could not create close physical port "
2815                               "request (adapter %s, port 0x%016Lx)\n",
2816                               zfcp_get_busid_by_adapter(erp_action->adapter),
2817                               erp_action->port->wwpn);
2818
2819                 goto out;
2820         }
2821
2822         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2823                                     erp_action->fsf_req->sbal_curr, 0);
2824         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2825         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2826
2827         /* mark port as being closed */
2828         atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2829                         &erp_action->port->status);
2830         /* save a pointer to this port */
2831         erp_action->fsf_req->data.close_physical_port.port = erp_action->port;
2832         /* port to be closeed */
2833         erp_action->fsf_req->qtcb->header.port_handle =
2834             erp_action->port->handle;
2835         erp_action->fsf_req->erp_action = erp_action;
2836
2837         /* start QDIO request for this FSF request */
2838         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2839         if (retval) {
2840                 ZFCP_LOG_INFO("error: Could not send close physical port "
2841                               "request (adapter %s, port 0x%016Lx)\n",
2842                               zfcp_get_busid_by_adapter(erp_action->adapter),
2843                               erp_action->port->wwpn);
2844                 zfcp_fsf_req_free(erp_action->fsf_req);
2845                 erp_action->fsf_req = NULL;
2846                 goto out;
2847         }
2848
2849         ZFCP_LOG_TRACE("close physical port request initiated "
2850                        "(adapter %s, port 0x%016Lx)\n",
2851                        zfcp_get_busid_by_adapter(erp_action->adapter),
2852                        erp_action->port->wwpn);
2853  out:
2854         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2855                                 lock_flags);
2856         return retval;
2857 }
2858
2859 /*
2860  * function:    zfcp_fsf_close_physical_port_handler
2861  *
2862  * purpose:     is called for finished Close Physical Port FSF command
2863  *
2864  * returns:
2865  */
2866 static int
2867 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2868 {
2869         int retval = -EINVAL;
2870         struct zfcp_port *port;
2871         struct zfcp_unit *unit;
2872         struct fsf_qtcb_header *header;
2873         u16 subtable, rule, counter;
2874
2875         port = fsf_req->data.close_physical_port.port;
2876         header = &fsf_req->qtcb->header;
2877
2878         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2879                 /* don't change port status in our bookkeeping */
2880                 goto skip_fsfstatus;
2881         }
2882
2883         /* evaluate FSF status in QTCB */
2884         switch (header->fsf_status) {
2885
2886         case FSF_PORT_HANDLE_NOT_VALID:
2887                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
2888                 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2889                               "(adapter %s, port 0x%016Lx). "
2890                               "This may happen occasionally.\n",
2891                               port->handle,
2892                               zfcp_get_busid_by_port(port),
2893                               port->wwpn);
2894                 ZFCP_LOG_DEBUG("status qualifier:\n");
2895                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2896                               (char *) &header->fsf_status_qual,
2897                               sizeof (union fsf_status_qual));
2898                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2899                                  "fsf_s_phand_nv");
2900                 zfcp_erp_adapter_reopen(port->adapter, 0);
2901                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2902                 break;
2903
2904         case FSF_ACCESS_DENIED:
2905                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
2906                 ZFCP_LOG_NORMAL("Access denied, cannot close "
2907                                 "physical port 0x%016Lx on adapter %s\n",
2908                                 port->wwpn, zfcp_get_busid_by_port(port));
2909                 for (counter = 0; counter < 2; counter++) {
2910                         subtable = header->fsf_status_qual.halfword[counter * 2];
2911                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2912                         switch (subtable) {
2913                         case FSF_SQ_CFDC_SUBTABLE_OS:
2914                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2915                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2916                         case FSF_SQ_CFDC_SUBTABLE_LUN:
2917                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2918                                         zfcp_act_subtable_type[subtable], rule);
2919                                 break;
2920                         }
2921                 }
2922                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2923                 zfcp_erp_port_access_denied(port);
2924                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2925                 break;
2926
2927         case FSF_PORT_BOXED:
2928                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
2929                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2930                                "%s needs to be reopened but it was attempted "
2931                                "to close it physically.\n",
2932                                port->wwpn,
2933                                zfcp_get_busid_by_port(port));
2934                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2935                 zfcp_erp_port_reopen(port, 0);
2936                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2937                         ZFCP_STATUS_FSFREQ_RETRY;
2938                 break;
2939
2940         case FSF_ADAPTER_STATUS_AVAILABLE:
2941                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2942                 switch (header->fsf_status_qual.word[0]) {
2943                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2944                         ZFCP_LOG_FLAGS(2,
2945                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
2946                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2947                                          "fsf_sq_ltest");
2948                         /* This will now be escalated by ERP */
2949                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2950                         break;
2951                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2952                         ZFCP_LOG_FLAGS(2,
2953                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
2954                         /* ERP strategy will escalate */
2955                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2956                                          "fsf_sq_ulp");
2957                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2958                         break;
2959                 default:
2960                         ZFCP_LOG_NORMAL
2961                             ("bug: Wrong status qualifier 0x%x arrived.\n",
2962                              header->fsf_status_qual.word[0]);
2963                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2964                                          "fsf_sq_inval:");
2965                         debug_exception(
2966                                 fsf_req->adapter->erp_dbf, 0,
2967                                 &header->fsf_status_qual.word[0], sizeof (u32));
2968                         break;
2969                 }
2970                 break;
2971
2972         case FSF_GOOD:
2973                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2974                 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2975                                "physically closed, port handle 0x%x\n",
2976                                port->wwpn,
2977                                zfcp_get_busid_by_port(port), port->handle);
2978                 /* can't use generic zfcp_erp_modify_port_status because
2979                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2980                  */
2981                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2982                 list_for_each_entry(unit, &port->unit_list_head, list)
2983                     atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2984                 retval = 0;
2985                 break;
2986
2987         default:
2988                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2989                                 "(debug info 0x%x)\n",
2990                                 header->fsf_status);
2991                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2992                 debug_exception(fsf_req->adapter->erp_dbf, 0,
2993                                 &header->fsf_status, sizeof (u32));
2994                 break;
2995         }
2996
2997  skip_fsfstatus:
2998         atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2999         return retval;
3000 }
3001
3002 /*
3003  * function:    zfcp_fsf_open_unit
3004  *
3005  * purpose:
3006  *
3007  * returns:
3008  *
3009  * assumptions: This routine does not check whether the associated
3010  *              remote port has already been opened. This should be
3011  *              done by calling routines. Otherwise some status
3012  *              may be presented by FSF
3013  */
3014 int
3015 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
3016 {
3017         volatile struct qdio_buffer_element *sbale;
3018         unsigned long lock_flags;
3019         int retval = 0;
3020
3021         /* setup new FSF request */
3022         retval = zfcp_fsf_req_create(erp_action->adapter,
3023                                      FSF_QTCB_OPEN_LUN,
3024                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3025                                      erp_action->adapter->pool.fsf_req_erp,
3026                                      &lock_flags, &(erp_action->fsf_req));
3027         if (retval < 0) {
3028                 ZFCP_LOG_INFO("error: Could not create open unit request for "
3029                               "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3030                               erp_action->unit->fcp_lun,
3031                               erp_action->unit->port->wwpn,
3032                               zfcp_get_busid_by_adapter(erp_action->adapter));
3033                 goto out;
3034         }
3035
3036         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3037                                     erp_action->fsf_req->sbal_curr, 0);
3038         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3039         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3040
3041         erp_action->fsf_req->qtcb->header.port_handle =
3042                 erp_action->port->handle;
3043         erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
3044                 erp_action->unit->fcp_lun;
3045         erp_action->fsf_req->qtcb->bottom.support.option =
3046                 FSF_OPEN_LUN_SUPPRESS_BOXING;
3047         atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
3048         erp_action->fsf_req->data.open_unit.unit = erp_action->unit;
3049         erp_action->fsf_req->erp_action = erp_action;
3050
3051         /* start QDIO request for this FSF request */
3052         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3053         if (retval) {
3054                 ZFCP_LOG_INFO("error: Could not send an open unit request "
3055                               "on the adapter %s, port 0x%016Lx for "
3056                               "unit 0x%016Lx\n",
3057                               zfcp_get_busid_by_adapter(erp_action->adapter),
3058                               erp_action->port->wwpn,
3059                               erp_action->unit->fcp_lun);
3060                 zfcp_fsf_req_free(erp_action->fsf_req);
3061                 erp_action->fsf_req = NULL;
3062                 goto out;
3063         }
3064
3065         ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
3066                        "port 0x%016Lx, unit 0x%016Lx)\n",
3067                        zfcp_get_busid_by_adapter(erp_action->adapter),
3068                        erp_action->port->wwpn, erp_action->unit->fcp_lun);
3069  out:
3070         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3071                                 lock_flags);
3072         return retval;
3073 }
3074
3075 /*
3076  * function:    zfcp_fsf_open_unit_handler
3077  *
3078  * purpose:     is called for finished Open LUN command
3079  *
3080  * returns:
3081  */
3082 static int
3083 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
3084 {
3085         int retval = -EINVAL;
3086         struct zfcp_adapter *adapter;
3087         struct zfcp_unit *unit;
3088         struct fsf_qtcb_header *header;
3089         struct fsf_qtcb_bottom_support *bottom;
3090         struct fsf_queue_designator *queue_designator;
3091         u16 subtable, rule, counter;
3092         u32 allowed, exclusive, readwrite;
3093
3094         unit = fsf_req->data.open_unit.unit;
3095
3096         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3097                 /* don't change unit status in our bookkeeping */
3098                 goto skip_fsfstatus;
3099         }
3100
3101         adapter = fsf_req->adapter;
3102         header = &fsf_req->qtcb->header;
3103         bottom = &fsf_req->qtcb->bottom.support;
3104         queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3105
3106         allowed   = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED;
3107         exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE;
3108         readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER;
3109
3110         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3111                           ZFCP_STATUS_UNIT_SHARED |
3112                           ZFCP_STATUS_UNIT_READONLY,
3113                           &unit->status);
3114
3115         /* evaluate FSF status in QTCB */
3116         switch (header->fsf_status) {
3117
3118         case FSF_PORT_HANDLE_NOT_VALID:
3119                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3120                 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3121                               "for port 0x%016Lx on adapter %s invalid "
3122                               "This may happen occasionally\n",
3123                               unit->port->handle,
3124                               unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3125                 ZFCP_LOG_DEBUG("status qualifier:\n");
3126                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3127                               (char *) &header->fsf_status_qual,
3128                               sizeof (union fsf_status_qual));
3129                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3130                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3131                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3132                 break;
3133
3134         case FSF_LUN_ALREADY_OPEN:
3135                 ZFCP_LOG_FLAGS(0, "FSF_LUN_ALREADY_OPEN\n");
3136                 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3137                                 "remote port 0x%016Lx on adapter %s twice.\n",
3138                                 unit->fcp_lun,
3139                                 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3140                 debug_text_exception(adapter->erp_dbf, 0,
3141                                      "fsf_s_uopen");
3142                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3143                 break;
3144
3145         case FSF_ACCESS_DENIED:
3146                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
3147                 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3148                                 "remote port 0x%016Lx on adapter %s\n",
3149                                 unit->fcp_lun, unit->port->wwpn,
3150                                 zfcp_get_busid_by_unit(unit));
3151                 for (counter = 0; counter < 2; counter++) {
3152                         subtable = header->fsf_status_qual.halfword[counter * 2];
3153                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3154                         switch (subtable) {
3155                         case FSF_SQ_CFDC_SUBTABLE_OS:
3156                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3157                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3158                         case FSF_SQ_CFDC_SUBTABLE_LUN:
3159                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3160                                         zfcp_act_subtable_type[subtable], rule);
3161                                 break;
3162                         }
3163                 }
3164                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3165                 zfcp_erp_unit_access_denied(unit);
3166                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3167                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3168                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3169                 break;
3170
3171         case FSF_PORT_BOXED:
3172                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
3173                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3174                                "needs to be reopened\n",
3175                                unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3176                 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3177                 zfcp_erp_port_reopen(unit->port, 0);
3178                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3179                         ZFCP_STATUS_FSFREQ_RETRY;
3180                 break;
3181
3182         case FSF_LUN_SHARING_VIOLATION:
3183                 ZFCP_LOG_FLAGS(2, "FSF_LUN_SHARING_VIOLATION\n");
3184                 if (header->fsf_status_qual.word[0] != 0) {
3185                         ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3186                                         "with WWPN 0x%Lx "
3187                                         "connected to the adapter %s "
3188                                         "is already in use in LPAR%d, CSS%d\n",
3189                                         unit->fcp_lun,
3190                                         unit->port->wwpn,
3191                                         zfcp_get_busid_by_unit(unit),
3192                                         queue_designator->hla,
3193                                         queue_designator->cssid);
3194                 } else {
3195                         subtable = header->fsf_status_qual.halfword[4];
3196                         rule = header->fsf_status_qual.halfword[5];
3197                         switch (subtable) {
3198                         case FSF_SQ_CFDC_SUBTABLE_OS:
3199                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3200                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3201                         case FSF_SQ_CFDC_SUBTABLE_LUN:
3202                                 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3203                                                 "remote port with WWPN 0x%Lx "
3204                                                 "connected to the adapter %s "
3205                                                 "is denied (%s rule %d)\n",
3206                                                 unit->fcp_lun,
3207                                                 unit->port->wwpn,
3208                                                 zfcp_get_busid_by_unit(unit),
3209                                                 zfcp_act_subtable_type[subtable],
3210                                                 rule);
3211                                 break;
3212                         }
3213                 }
3214                 ZFCP_LOG_DEBUG("status qualifier:\n");
3215                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3216                               (char *) &header->fsf_status_qual,
3217                               sizeof (union fsf_status_qual));
3218                 debug_text_event(adapter->erp_dbf, 2,
3219                                  "fsf_s_l_sh_vio");
3220                 zfcp_erp_unit_access_denied(unit);
3221                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3222                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3223                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3224                 break;
3225
3226         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3227                 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED\n");
3228                 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3229                               "There is no handle (temporary port identifier) "
3230                               "available for unit 0x%016Lx on port 0x%016Lx "
3231                               "on adapter %s\n",
3232                               unit->fcp_lun,
3233                               unit->port->wwpn,
3234                               zfcp_get_busid_by_unit(unit));
3235                 debug_text_event(adapter->erp_dbf, 1,
3236                                  "fsf_s_max_units");
3237                 zfcp_erp_unit_failed(unit);
3238                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3239                 break;
3240
3241         case FSF_ADAPTER_STATUS_AVAILABLE:
3242                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
3243                 switch (header->fsf_status_qual.word[0]) {
3244                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3245                         ZFCP_LOG_FLAGS(2,
3246                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
3247                         /* Re-establish link to port */
3248                         debug_text_event(adapter->erp_dbf, 1,
3249                                          "fsf_sq_ltest");
3250                         zfcp_erp_port_reopen(unit->port, 0);
3251                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3252                         break;
3253                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3254                         ZFCP_LOG_FLAGS(2,
3255                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
3256                         /* ERP strategy will escalate */
3257                         debug_text_event(adapter->erp_dbf, 1,
3258                                          "fsf_sq_ulp");
3259                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3260                         break;
3261                 default:
3262                         ZFCP_LOG_NORMAL
3263                             ("bug: Wrong status qualifier 0x%x arrived.\n",
3264                              header->fsf_status_qual.word[0]);
3265                         debug_text_event(adapter->erp_dbf, 0,
3266                                          "fsf_sq_inval:");
3267                         debug_exception(adapter->erp_dbf, 0,
3268                                         &header->fsf_status_qual.word[0],
3269                                 sizeof (u32));
3270                 }
3271                 break;
3272
3273         case FSF_INVALID_COMMAND_OPTION:
3274                 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
3275                 ZFCP_LOG_NORMAL(
3276                         "Invalid option 0x%x has been specified "
3277                         "in QTCB bottom sent to the adapter %s\n",
3278                         bottom->option,
3279                         zfcp_get_busid_by_adapter(adapter));
3280                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3281                 retval = -EINVAL;
3282                 break;
3283
3284         case FSF_GOOD:
3285                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
3286                 /* save LUN handle assigned by FSF */
3287                 unit->handle = header->lun_handle;
3288                 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3289                                "adapter %s opened, port handle 0x%x\n",
3290                                unit->fcp_lun,
3291                                unit->port->wwpn,
3292                                zfcp_get_busid_by_unit(unit),
3293                                unit->handle);
3294                 /* mark unit as open */
3295                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3296
3297                 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){
3298                         if (!exclusive)
3299                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3300                                                 &unit->status);
3301
3302                         if (!readwrite) {
3303                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3304                                                 &unit->status);
3305                                 ZFCP_LOG_NORMAL("read-only access for unit "
3306                                                 "(adapter %s, wwpn=0x%016Lx, "
3307                                                 "fcp_lun=0x%016Lx)\n",
3308                                                 zfcp_get_busid_by_unit(unit),
3309                                                 unit->port->wwpn,
3310                                                 unit->fcp_lun);
3311                         }
3312
3313                         if (exclusive && !readwrite) {
3314                                 ZFCP_LOG_NORMAL("exclusive access of read-only "
3315                                                 "unit not supported\n");
3316                                 zfcp_erp_unit_failed(unit);
3317                                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3318                                 zfcp_erp_unit_shutdown(unit, 0);
3319                         } else if (!exclusive && readwrite) {
3320                                 ZFCP_LOG_NORMAL("shared access of read-write "
3321                                                 "unit not supported\n");
3322                                 zfcp_erp_unit_failed(unit);
3323                                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3324                                 zfcp_erp_unit_shutdown(unit, 0);
3325                         }
3326                 }
3327
3328                 retval = 0;
3329                 break;
3330
3331         default:
3332                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3333                                 "(debug info 0x%x)\n",
3334                                 header->fsf_status);
3335                 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3336                 debug_exception(adapter->erp_dbf, 0,
3337                                 &header->fsf_status, sizeof (u32));
3338                 break;
3339         }
3340
3341  skip_fsfstatus:
3342         atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3343         return retval;
3344 }
3345
3346 /*
3347  * function:    zfcp_fsf_close_unit
3348  *
3349  * purpose:
3350  *
3351  * returns:     address of fsf_req - request successfully initiated
3352  *              NULL -
3353  *
3354  * assumptions: This routine does not check whether the associated
3355  *              remote port/lun has already been opened. This should be
3356  *              done by calling routines. Otherwise some status
3357  *              may be presented by FSF
3358  */
3359 int
3360 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3361 {
3362         volatile struct qdio_buffer_element *sbale;
3363         unsigned long lock_flags;
3364         int retval = 0;
3365
3366         /* setup new FSF request */
3367         retval = zfcp_fsf_req_create(erp_action->adapter,
3368                                      FSF_QTCB_CLOSE_LUN,
3369                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3370                                      erp_action->adapter->pool.fsf_req_erp,
3371                                      &lock_flags, &(erp_action->fsf_req));
3372         if (retval < 0) {
3373                 ZFCP_LOG_INFO("error: Could not create close unit request for "
3374                               "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3375                               erp_action->unit->fcp_lun,
3376                               erp_action->port->wwpn,
3377                               zfcp_get_busid_by_adapter(erp_action->adapter));
3378                 goto out;
3379         }
3380
3381         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3382                                     erp_action->fsf_req->sbal_curr, 0);
3383         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3384         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3385
3386         erp_action->fsf_req->qtcb->header.port_handle =
3387             erp_action->port->handle;
3388         erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3389         atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3390         erp_action->fsf_req->data.close_unit.unit = erp_action->unit;
3391         erp_action->fsf_req->erp_action = erp_action;
3392
3393         /* start QDIO request for this FSF request */
3394         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3395         if (retval) {
3396                 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3397                               "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3398                               erp_action->unit->fcp_lun,
3399                               erp_action->port->wwpn,
3400                               zfcp_get_busid_by_adapter(erp_action->adapter));
3401                 zfcp_fsf_req_free(erp_action->fsf_req);
3402                 erp_action->fsf_req = NULL;
3403                 goto out;
3404         }
3405
3406         ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3407                        "port 0x%016Lx, unit 0x%016Lx)\n",
3408                        zfcp_get_busid_by_adapter(erp_action->adapter),
3409                        erp_action->port->wwpn, erp_action->unit->fcp_lun);
3410  out:
3411         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3412                                 lock_flags);
3413         return retval;
3414 }
3415
3416 /*
3417  * function:    zfcp_fsf_close_unit_handler
3418  *
3419  * purpose:     is called for finished Close LUN FSF command
3420  *
3421  * returns:
3422  */
3423 static int
3424 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3425 {
3426         int retval = -EINVAL;
3427         struct zfcp_unit *unit;
3428
3429         unit = fsf_req->data.close_unit.unit;   /* restore unit */
3430
3431         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3432                 /* don't change unit status in our bookkeeping */
3433                 goto skip_fsfstatus;
3434         }
3435
3436         /* evaluate FSF status in QTCB */
3437         switch (fsf_req->qtcb->header.fsf_status) {
3438
3439         case FSF_PORT_HANDLE_NOT_VALID:
3440                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3441                 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3442                               "0x%016Lx on adapter %s invalid. This may "
3443                               "happen in rare circumstances\n",
3444                               unit->port->handle,
3445                               unit->port->wwpn,
3446                               zfcp_get_busid_by_unit(unit));
3447                 ZFCP_LOG_DEBUG("status qualifier:\n");
3448                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3449                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
3450                               sizeof (union fsf_status_qual));
3451                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3452                                  "fsf_s_phand_nv");
3453                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3454                 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req,
3455                                        &fsf_req->qtcb->header.fsf_status_qual,
3456                                        sizeof (union fsf_status_qual));
3457                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3458                 break;
3459
3460         case FSF_LUN_HANDLE_NOT_VALID:
3461                 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
3462                 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3463                               "0x%016Lx on port 0x%016Lx on adapter %s is "
3464                               "invalid. This may happen occasionally.\n",
3465                               unit->handle,
3466                               unit->fcp_lun,
3467                               unit->port->wwpn,
3468                               zfcp_get_busid_by_unit(unit));
3469                 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3470                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3471                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
3472                               sizeof (union fsf_status_qual));
3473                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3474                                  "fsf_s_lhand_nv");
3475                 zfcp_erp_port_reopen(unit->port, 0);
3476                 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req,
3477                                        &fsf_req->qtcb->header.fsf_status_qual,
3478                                        sizeof (union fsf_status_qual));
3479                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3480                 break;
3481
3482         case FSF_PORT_BOXED:
3483                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
3484                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3485                                "needs to be reopened\n",
3486                                unit->port->wwpn,
3487                                zfcp_get_busid_by_unit(unit));
3488                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3489                 zfcp_erp_port_reopen(unit->port, 0);
3490                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3491                         ZFCP_STATUS_FSFREQ_RETRY;
3492                 break;
3493
3494         case FSF_ADAPTER_STATUS_AVAILABLE:
3495                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
3496                 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3497                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3498                         ZFCP_LOG_FLAGS(2,
3499                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
3500                         /* re-establish link to port */
3501                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
3502                                          "fsf_sq_ltest");
3503                         zfcp_erp_port_reopen(unit->port, 0);
3504                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3505                         break;
3506                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3507                         ZFCP_LOG_FLAGS(2,
3508                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
3509                         /* ERP strategy will escalate */
3510                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
3511                                          "fsf_sq_ulp");
3512                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3513                         break;
3514                 default:
3515                         ZFCP_LOG_NORMAL
3516                             ("bug: Wrong status qualifier 0x%x arrived.\n",
3517                              fsf_req->qtcb->header.fsf_status_qual.word[0]);
3518                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
3519                                          "fsf_sq_inval:");
3520                         debug_exception(
3521                                 fsf_req->adapter->erp_dbf, 0,
3522                                 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3523                                 sizeof (u32));
3524                         break;
3525                 }
3526                 break;
3527
3528         case FSF_GOOD:
3529                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
3530                 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3531                                "closed, port handle 0x%x\n",
3532                                unit->fcp_lun,
3533                                unit->port->wwpn,
3534                                zfcp_get_busid_by_unit(unit),
3535                                unit->handle);
3536                 /* mark unit as closed */
3537                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3538                 retval = 0;
3539                 break;
3540
3541         default:
3542                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3543                                 "(debug info 0x%x)\n",
3544                                 fsf_req->qtcb->header.fsf_status);
3545                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3546                 debug_exception(fsf_req->adapter->erp_dbf, 0,
3547                                 &fsf_req->qtcb->header.fsf_status,
3548                                 sizeof (u32));
3549                 break;
3550         }
3551
3552  skip_fsfstatus:
3553         atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3554         return retval;
3555 }
3556
3557 /**
3558  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3559  * @adapter: adapter where scsi command is issued
3560  * @unit: unit where command is sent to
3561  * @scsi_cmnd: scsi command to be sent
3562  * @timer: timer to be started when request is initiated
3563  * @req_flags: flags for fsf_request
3564  */
3565 int
3566 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3567                                struct zfcp_unit *unit,
3568                                struct scsi_cmnd * scsi_cmnd,
3569                                struct timer_list *timer, int req_flags)
3570 {
3571         struct zfcp_fsf_req *fsf_req = NULL;
3572         struct fcp_cmnd_iu *fcp_cmnd_iu;
3573         unsigned int sbtype;
3574         unsigned long lock_flags;
3575         int real_bytes = 0;
3576         int retval = 0;
3577         int mask;
3578
3579         /* setup new FSF request */
3580         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3581                                      adapter->pool.fsf_req_scsi,
3582                                      &lock_flags, &fsf_req);
3583         if (unlikely(retval < 0)) {
3584                 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3585                                "for unit 0x%016Lx on port 0x%016Lx on "
3586                                "adapter %s\n",
3587                                unit->fcp_lun,
3588                                unit->port->wwpn,
3589                                zfcp_get_busid_by_adapter(adapter));
3590                 goto failed_req_create;
3591         }
3592
3593         /*
3594          * associate FSF request with SCSI request
3595          * (need this for look up on abort)
3596          */
3597         fsf_req->data.send_fcp_command_task.fsf_req = fsf_req;
3598         scsi_cmnd->host_scribble = (char *) &(fsf_req->data);
3599
3600         /*
3601          * associate SCSI command with FSF request
3602          * (need this for look up on normal command completion)
3603          */
3604         fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd;
3605         fsf_req->data.send_fcp_command_task.start_jiffies = jiffies;
3606         fsf_req->data.send_fcp_command_task.unit = unit;
3607         ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun);
3608
3609         /* set handles of unit and its parent port in QTCB */
3610         fsf_req->qtcb->header.lun_handle = unit->handle;
3611         fsf_req->qtcb->header.port_handle = unit->port->handle;
3612
3613         /* FSF does not define the structure of the FCP_CMND IU */
3614         fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3615             &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3616
3617         /*
3618          * set depending on data direction:
3619          *      data direction bits in SBALE (SB Type)
3620          *      data direction bits in QTCB
3621          *      data direction bits in FCP_CMND IU
3622          */
3623         switch (scsi_cmnd->sc_data_direction) {
3624         case DMA_NONE:
3625                 ZFCP_LOG_FLAGS(3, "DMA_NONE\n");
3626                 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3627                 /*
3628                  * FIXME(qdio):
3629                  * what is the correct type for commands
3630                  * without 'real' data buffers?
3631                  */
3632                 sbtype = SBAL_FLAGS0_TYPE_READ;
3633                 break;
3634         case DMA_FROM_DEVICE:
3635                 ZFCP_LOG_FLAGS(3, "DMA_FROM_DEVICE\n");
3636                 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3637                 sbtype = SBAL_FLAGS0_TYPE_READ;
3638                 fcp_cmnd_iu->rddata = 1;
3639                 break;
3640         case DMA_TO_DEVICE:
3641                 ZFCP_LOG_FLAGS(3, "DMA_TO_DEVICE\n");
3642                 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3643                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3644                 fcp_cmnd_iu->wddata = 1;
3645                 break;
3646         case DMA_BIDIRECTIONAL:
3647                 ZFCP_LOG_FLAGS(0, "DMA_BIDIRECTIONAL not supported\n");
3648         default:
3649                 /*
3650                  * dummy, catch this condition earlier
3651                  * in zfcp_scsi_queuecommand
3652                  */
3653                 goto failed_scsi_cmnd;
3654         }
3655
3656         /* set FC service class in QTCB (3 per default) */
3657         fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3658
3659         /* set FCP_LUN in FCP_CMND IU in QTCB */
3660         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3661
3662         mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3663
3664         /* set task attributes in FCP_CMND IU in QTCB */
3665         if (likely((scsi_cmnd->device->simple_tags) ||
3666                    (atomic_test_mask(mask, &unit->status))))
3667                 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3668         else
3669                 fcp_cmnd_iu->task_attribute = UNTAGGED;
3670
3671         /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3672         if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3673                 fcp_cmnd_iu->add_fcp_cdb_length
3674                     = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3675                 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3676                                "additional FCP_CDB length is 0x%x "
3677                                "(shifted right 2 bits)\n",
3678                                scsi_cmnd->cmd_len,
3679                                fcp_cmnd_iu->add_fcp_cdb_length);
3680         }
3681         /*
3682          * copy SCSI CDB (including additional length, if any) to
3683          * FCP_CDB in FCP_CMND IU in QTCB
3684          */
3685         memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3686
3687         /* FCP CMND IU length in QTCB */
3688         fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3689                 sizeof (struct fcp_cmnd_iu) +
3690                 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3691
3692         /* generate SBALEs from data buffer */
3693         real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3694         if (unlikely(real_bytes < 0)) {
3695                 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3696                         ZFCP_LOG_DEBUG(
3697                                 "Data did not fit into available buffer(s), "
3698                                "waiting for more...\n");
3699                 retval = -EIO;
3700         } else {
3701                 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3702                                 "required. Shutting down unit "
3703                                 "(adapter %s, port 0x%016Lx, "
3704                                 "unit 0x%016Lx)\n",
3705                                 zfcp_get_busid_by_unit(unit),
3706                                 unit->port->wwpn,
3707                                 unit->fcp_lun);
3708                 zfcp_erp_unit_shutdown(unit, 0);
3709                 retval = -EINVAL;
3710                 }
3711                 goto no_fit;
3712         }
3713
3714         /* set length of FCP data length in FCP_CMND IU in QTCB */
3715         zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3716
3717         ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3718         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3719                       (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3720
3721         /*
3722          * start QDIO request for this FSF request
3723          *  covered by an SBALE)
3724          */
3725         retval = zfcp_fsf_req_send(fsf_req, timer);
3726         if (unlikely(retval < 0)) {
3727                 ZFCP_LOG_INFO("error: Could not send FCP command request "
3728                               "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3729                               zfcp_get_busid_by_adapter(adapter),
3730                               unit->port->wwpn,
3731                               unit->fcp_lun);
3732                 goto send_failed;
3733         }
3734
3735         ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3736                        "port 0x%016Lx, unit 0x%016Lx)\n",
3737                        zfcp_get_busid_by_adapter(adapter),
3738                        unit->port->wwpn,
3739                        unit->fcp_lun);
3740         goto success;
3741
3742  send_failed:
3743  no_fit:
3744  failed_scsi_cmnd:
3745         zfcp_fsf_req_free(fsf_req);
3746         fsf_req = NULL;
3747         scsi_cmnd->host_scribble = NULL;
3748  success:
3749  failed_req_create:
3750         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3751         return retval;
3752 }
3753
3754 /*
3755  * function:    zfcp_fsf_send_fcp_command_task_management
3756  *
3757  * purpose:
3758  *
3759  * returns:
3760  *
3761  * FIXME(design): should be watched by a timeout!!!
3762  * FIXME(design) shouldn't this be modified to return an int
3763  *               also...don't know how though
3764  *
3765  */
3766 struct zfcp_fsf_req *
3767 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3768                                           struct zfcp_unit *unit,
3769                                           u8 tm_flags, int req_flags)
3770 {
3771         struct zfcp_fsf_req *fsf_req = NULL;
3772         int retval = 0;
3773         struct fcp_cmnd_iu *fcp_cmnd_iu;
3774         unsigned long lock_flags;
3775         volatile struct qdio_buffer_element *sbale;
3776
3777         /* setup new FSF request */
3778         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3779                                      adapter->pool.fsf_req_scsi,
3780                                      &lock_flags, &fsf_req);
3781         if (retval < 0) {
3782                 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3783                               "management) request for adapter %s, port "
3784                               " 0x%016Lx, unit 0x%016Lx.\n",
3785                               zfcp_get_busid_by_adapter(adapter),
3786                               unit->port->wwpn, unit->fcp_lun);
3787                 goto out;
3788         }
3789
3790         /*
3791          * Used to decide on proper handler in the return path,
3792          * could be either zfcp_fsf_send_fcp_command_task_handler or
3793          * zfcp_fsf_send_fcp_command_task_management_handler */
3794
3795         fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3796
3797         /*
3798          * hold a pointer to the unit being target of this
3799          * task management request
3800          */
3801         fsf_req->data.send_fcp_command_task_management.unit = unit;
3802
3803         /* set FSF related fields in QTCB */
3804         fsf_req->qtcb->header.lun_handle = unit->handle;
3805         fsf_req->qtcb->header.port_handle = unit->port->handle;
3806         fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3807         fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3808         fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3809                 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3810
3811         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3812         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3813         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3814
3815         /* set FCP related fields in FCP_CMND IU in QTCB */
3816         fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3817                 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3818         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3819         fcp_cmnd_iu->task_management_flags = tm_flags;
3820
3821         /* start QDIO request for this FSF request */
3822         zfcp_fsf_start_scsi_er_timer(adapter);
3823         retval = zfcp_fsf_req_send(fsf_req, NULL);
3824         if (retval) {
3825                 del_timer(&adapter->scsi_er_timer);
3826                 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3827                               "management) on adapter %s, port 0x%016Lx for "
3828                               "unit LUN 0x%016Lx\n",
3829                               zfcp_get_busid_by_adapter(adapter),
3830                               unit->port->wwpn,
3831                               unit->fcp_lun);
3832                 zfcp_fsf_req_free(fsf_req);
3833                 fsf_req = NULL;
3834                 goto out;
3835         }
3836
3837         ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3838                        "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3839                        "tm_flags=0x%x)\n",
3840                        zfcp_get_busid_by_adapter(adapter),
3841                        unit->port->wwpn,
3842                        unit->fcp_lun,
3843                        tm_flags);
3844  out:
3845         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3846         return fsf_req;
3847 }
3848
3849 /*
3850  * function:    zfcp_fsf_send_fcp_command_handler
3851  *
3852  * purpose:     is called for finished Send FCP Command
3853  *
3854  * returns:
3855  */
3856 static int
3857 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3858 {
3859         int retval = -EINVAL;
3860         struct zfcp_unit *unit;
3861         struct fsf_qtcb_header *header;
3862         u16 subtable, rule, counter;
3863
3864         header = &fsf_req->qtcb->header;
3865
3866         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3867                 unit = fsf_req->data.send_fcp_command_task_management.unit;
3868         else
3869                 unit = fsf_req->data.send_fcp_command_task.unit;
3870
3871         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3872                 /* go directly to calls of special handlers */
3873                 goto skip_fsfstatus;
3874         }
3875
3876         /* evaluate FSF status in QTCB */
3877         switch (header->fsf_status) {
3878
3879         case FSF_PORT_HANDLE_NOT_VALID:
3880                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3881                 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3882                               "0x%016Lx on adapter %s invalid\n",
3883                               unit->port->handle,
3884                               unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3885                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3886                               (char *) &header->fsf_status_qual,
3887                               sizeof (union fsf_status_qual));
3888                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3889                                  "fsf_s_phand_nv");
3890                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3891                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3892                 break;
3893
3894         case FSF_LUN_HANDLE_NOT_VALID:
3895                 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
3896                 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3897                               "0x%016Lx on port 0x%016Lx on adapter %s is "
3898                               "invalid. This may happen occasionally.\n",
3899                               unit->handle,
3900                               unit->fcp_lun,
3901                               unit->port->wwpn,
3902                               zfcp_get_busid_by_unit(unit));
3903                 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3904                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3905                               (char *) &header->fsf_status_qual,
3906                               sizeof (union fsf_status_qual));
3907                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3908                                  "fsf_s_uhand_nv");
3909                 zfcp_erp_port_reopen(unit->port, 0);
3910                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3911                 break;
3912
3913         case FSF_HANDLE_MISMATCH:
3914                 ZFCP_LOG_FLAGS(0, "FSF_HANDLE_MISMATCH\n");
3915                 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3916                                 "unexpectedly. (adapter %s, port 0x%016Lx, "
3917                                 "unit 0x%016Lx)\n",
3918                                 unit->port->handle,
3919                                 zfcp_get_busid_by_unit(unit),
3920                                 unit->port->wwpn,
3921                                 unit->fcp_lun);
3922                 ZFCP_LOG_NORMAL("status qualifier:\n");
3923                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3924                               (char *) &header->fsf_status_qual,
3925                               sizeof (union fsf_status_qual));
3926                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3927                                  "fsf_s_hand_mis");
3928                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3929                 zfcp_cmd_dbf_event_fsf("handmism",
3930                                        fsf_req,
3931                                        &header->fsf_status_qual,
3932                                        sizeof (union fsf_status_qual));
3933                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3934                 break;
3935
3936         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3937                 ZFCP_LOG_FLAGS(0, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
3938                 if (fsf_req->adapter->fc_service_class <= 3) {
3939                         ZFCP_LOG_NORMAL("error: The adapter %s does "
3940                                         "not support fibrechannel class %d.\n",
3941                                         zfcp_get_busid_by_unit(unit),
3942                                         fsf_req->adapter->fc_service_class);
3943                 } else {
3944                         ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3945                                         "adapter %s is invalid. "
3946                                         "(debug info %d)\n",
3947                                         zfcp_get_busid_by_unit(unit),
3948                                         fsf_req->adapter->fc_service_class);
3949                 }
3950                 /* stop operation for this adapter */
3951                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3952                                      "fsf_s_class_nsup");
3953                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3954                 zfcp_cmd_dbf_event_fsf("unsclass",
3955                                        fsf_req,
3956                                        &header->fsf_status_qual,
3957                                        sizeof (union fsf_status_qual));
3958                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3959                 break;
3960
3961         case FSF_FCPLUN_NOT_VALID:
3962                 ZFCP_LOG_FLAGS(0, "FSF_FCPLUN_NOT_VALID\n");
3963                 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3964                                 "adapter %s does not have correct unit "
3965                                 "handle 0x%x\n",
3966                                 unit->fcp_lun,
3967                                 unit->port->wwpn,
3968                                 zfcp_get_busid_by_unit(unit),
3969                                 unit->handle);
3970                 ZFCP_LOG_DEBUG("status qualifier:\n");
3971                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3972                               (char *) &header->fsf_status_qual,
3973                               sizeof (union fsf_status_qual));
3974                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3975                                  "fsf_s_fcp_lun_nv");
3976                 zfcp_erp_port_reopen(unit->port, 0);
3977                 zfcp_cmd_dbf_event_fsf("fluninv",
3978                                        fsf_req,
3979                                        &header->fsf_status_qual,
3980                                        sizeof (union fsf_status_qual));
3981                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3982                 break;
3983
3984         case FSF_ACCESS_DENIED:
3985                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
3986                 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3987                                 "unit 0x%016Lx on port 0x%016Lx on "
3988                                 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3989                                 zfcp_get_busid_by_unit(unit));
3990                 for (counter = 0; counter < 2; counter++) {
3991                         subtable = header->fsf_status_qual.halfword[counter * 2];
3992                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3993                         switch (subtable) {
3994                         case FSF_SQ_CFDC_SUBTABLE_OS:
3995                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3996                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3997                         case FSF_SQ_CFDC_SUBTABLE_LUN:
3998                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3999                                         zfcp_act_subtable_type[subtable], rule);
4000                                 break;
4001                         }
4002                 }
4003                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
4004                 zfcp_erp_unit_access_denied(unit);
4005                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4006                 break;
4007
4008         case FSF_DIRECTION_INDICATOR_NOT_VALID:
4009                 ZFCP_LOG_FLAGS(0, "FSF_DIRECTION_INDICATOR_NOT_VALID\n");
4010                 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
4011                               "0x%016Lx on port 0x%016Lx on adapter %s "
4012                               "(debug info %d)\n",
4013                               unit->fcp_lun,
4014                               unit->port->wwpn,
4015                               zfcp_get_busid_by_unit(unit),
4016                               fsf_req->qtcb->bottom.io.data_direction);
4017                 /* stop operation for this adapter */
4018                 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4019                                  "fsf_s_dir_ind_nv");
4020                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
4021                 zfcp_cmd_dbf_event_fsf("dirinv",
4022                                        fsf_req,
4023                                        &header->fsf_status_qual,
4024                                        sizeof (union fsf_status_qual));
4025                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4026                 break;
4027
4028         case FSF_CMND_LENGTH_NOT_VALID:
4029                 ZFCP_LOG_FLAGS(0, "FSF_CMND_LENGTH_NOT_VALID\n");
4030                 ZFCP_LOG_NORMAL
4031                     ("bug: An invalid control-data-block length field "
4032                      "was found in a command for unit 0x%016Lx on port "
4033                      "0x%016Lx on adapter %s " "(debug info %d)\n",
4034                      unit->fcp_lun, unit->port->wwpn,
4035                      zfcp_get_busid_by_unit(unit),
4036                      fsf_req->qtcb->bottom.io.fcp_cmnd_length);
4037                 /* stop operation for this adapter */
4038                 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4039                                  "fsf_s_cmd_len_nv");
4040                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
4041                 zfcp_cmd_dbf_event_fsf("cleninv",
4042                                        fsf_req,
4043                                        &header->fsf_status_qual,
4044                                        sizeof (union fsf_status_qual));
4045                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4046                 break;
4047
4048         case FSF_PORT_BOXED:
4049                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
4050                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
4051                                "needs to be reopened\n",
4052                                unit->port->wwpn, zfcp_get_busid_by_unit(unit));
4053                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
4054                 zfcp_erp_port_reopen(unit->port, 0);
4055                 zfcp_cmd_dbf_event_fsf("portbox", fsf_req,
4056                                        &header->fsf_status_qual,
4057                                        sizeof (union fsf_status_qual));
4058                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
4059                         ZFCP_STATUS_FSFREQ_RETRY;
4060                 break;
4061
4062         case FSF_LUN_BOXED:
4063                 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
4064                 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
4065                                 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
4066                                 zfcp_get_busid_by_unit(unit),
4067                                 unit->port->wwpn, unit->fcp_lun);
4068                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
4069                 zfcp_erp_unit_reopen(unit, 0);
4070                 zfcp_cmd_dbf_event_fsf("unitbox", fsf_req,
4071                                        &header->fsf_status_qual,
4072                                        sizeof(union fsf_status_qual));
4073                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
4074                         | ZFCP_STATUS_FSFREQ_RETRY;
4075                 break;
4076
4077         case FSF_ADAPTER_STATUS_AVAILABLE:
4078                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
4079                 switch (header->fsf_status_qual.word[0]) {
4080                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
4081                         ZFCP_LOG_FLAGS(2,
4082                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
4083                         /* re-establish link to port */
4084                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
4085                                          "fsf_sq_ltest");
4086                         zfcp_erp_port_reopen(unit->port, 0);
4087                         zfcp_cmd_dbf_event_fsf(
4088                                 "sqltest",
4089                                 fsf_req,
4090                                 &header->fsf_status_qual,
4091                                 sizeof (union fsf_status_qual));
4092                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4093                         break;
4094                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
4095                         ZFCP_LOG_FLAGS(3,
4096                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
4097                         /* FIXME(hw) need proper specs for proper action */
4098                         /* let scsi stack deal with retries and escalation */
4099                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
4100                                          "fsf_sq_ulp");
4101                         zfcp_cmd_dbf_event_fsf(
4102                                 "sqdeperp",
4103                                 fsf_req,
4104                                 &header->fsf_status_qual,
4105                                 sizeof (union fsf_status_qual));
4106                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4107                         break;
4108                 default:
4109                         /* FIXME: shall we consider this a successful transfer? */
4110                         ZFCP_LOG_NORMAL
4111                             ("bug: Wrong status qualifier 0x%x arrived.\n",
4112                              header->fsf_status_qual.word[0]);
4113                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
4114                                          "fsf_sq_inval:");
4115                         debug_exception(fsf_req->adapter->erp_dbf, 0,
4116                                         &header->fsf_status_qual.word[0],
4117                                         sizeof(u32));
4118                         break;
4119                 }
4120                 break;
4121
4122         case FSF_GOOD:
4123                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
4124                 break;
4125
4126         case FSF_FCP_RSP_AVAILABLE:
4127                 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
4128                 break;
4129
4130         default:
4131                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
4132                 debug_exception(fsf_req->adapter->erp_dbf, 0,
4133                                 &header->fsf_status, sizeof(u32));
4134                 break;
4135         }
4136
4137  skip_fsfstatus:
4138         if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
4139                 retval =
4140                     zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
4141         } else {
4142                 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
4143         }
4144         return retval;
4145 }
4146
4147 /*
4148  * function:    zfcp_fsf_send_fcp_command_task_handler
4149  *
4150  * purpose:     evaluates FCP_RSP IU
4151  *
4152  * returns:
4153  */
4154 static int
4155 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
4156 {
4157         int retval = 0;
4158         struct scsi_cmnd *scpnt;
4159         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4160             &(fsf_req->qtcb->bottom.io.fcp_rsp);
4161         struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
4162             &(fsf_req->qtcb->bottom.io.fcp_cmnd);
4163         u32 sns_len;
4164         char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4165         unsigned long flags;
4166         struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit;
4167
4168         read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
4169         scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd;
4170         if (unlikely(!scpnt)) {
4171                 ZFCP_LOG_DEBUG
4172                     ("Command with fsf_req %p is not associated to "
4173                      "a scsi command anymore. Aborted?\n", fsf_req);
4174                 goto out;
4175         }
4176         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
4177                 /* FIXME: (design) mid-layer should handle DID_ABORT like
4178                  *        DID_SOFT_ERROR by retrying the request for devices
4179                  *        that allow retries.
4180                  */
4181                 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
4182                 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
4183                 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
4184                 goto skip_fsfstatus;
4185         }
4186
4187         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
4188                 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
4189                 set_host_byte(&scpnt->result, DID_ERROR);
4190                 goto skip_fsfstatus;
4191         }
4192
4193         /* set message byte of result in SCSI command */
4194         scpnt->result |= COMMAND_COMPLETE << 8;
4195
4196         /*
4197          * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4198          * of result in SCSI command
4199          */
4200         scpnt->result |= fcp_rsp_iu->scsi_status;
4201         if (unlikely(fcp_rsp_iu->scsi_status)) {
4202                 /* DEBUG */
4203                 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4204                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4205                               scpnt->cmnd, scpnt->cmd_len);
4206                 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4207                                 fcp_rsp_iu->scsi_status);
4208                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4209                               (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4210                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4211                               zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4212                               fcp_rsp_iu->fcp_sns_len);
4213         }
4214
4215         /* check FCP_RSP_INFO */
4216         if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4217                 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4218                 switch (fcp_rsp_info[3]) {
4219                 case RSP_CODE_GOOD:
4220                         ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
4221                         /* ok, continue */
4222                         ZFCP_LOG_TRACE("no failure or Task Management "
4223                                        "Function complete\n");
4224                         set_host_byte(&scpnt->result, DID_OK);
4225                         break;
4226                 case RSP_CODE_LENGTH_MISMATCH:
4227                         ZFCP_LOG_FLAGS(0, "RSP_CODE_LENGTH_MISMATCH\n");
4228                         /* hardware bug */
4229                         ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4230                                         "that the fibrechannel protocol data "
4231                                         "length differs from the burst length. "
4232                                         "The problem occured on unit 0x%016Lx "
4233                                         "on port 0x%016Lx on adapter %s",
4234                                         unit->fcp_lun,
4235                                         unit->port->wwpn,
4236                                         zfcp_get_busid_by_unit(unit));
4237                         /* dump SCSI CDB as prepared by zfcp */
4238                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4239                                       (char *) &fsf_req->qtcb->
4240                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4241                         zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0);
4242                         set_host_byte(&scpnt->result, DID_ERROR);
4243                         goto skip_fsfstatus;
4244                 case RSP_CODE_FIELD_INVALID:
4245                         ZFCP_LOG_FLAGS(0, "RSP_CODE_FIELD_INVALID\n");
4246                         /* driver or hardware bug */
4247                         ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4248                                         "that the fibrechannel protocol data "
4249                                         "fields were incorrectly set up. "
4250                                         "The problem occured on the unit "
4251                                         "0x%016Lx on port 0x%016Lx on "
4252                                         "adapter %s",
4253                                         unit->fcp_lun,
4254                                         unit->port->wwpn,
4255                                         zfcp_get_busid_by_unit(unit));
4256                         /* dump SCSI CDB as prepared by zfcp */
4257                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4258                                       (char *) &fsf_req->qtcb->
4259                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4260                         set_host_byte(&scpnt->result, DID_ERROR);
4261                         zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0);
4262                         goto skip_fsfstatus;
4263                 case RSP_CODE_RO_MISMATCH:
4264                         ZFCP_LOG_FLAGS(0, "RSP_CODE_RO_MISMATCH\n");
4265                         /* hardware bug */
4266                         ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4267                                         "that conflicting  values for the "
4268                                         "fibrechannel payload offset from the "
4269                                         "header were found. "
4270                                         "The problem occured on unit 0x%016Lx "
4271                                         "on port 0x%016Lx on adapter %s.\n",
4272                                         unit->fcp_lun,
4273                                         unit->port->wwpn,
4274                                         zfcp_get_busid_by_unit(unit));
4275                         /* dump SCSI CDB as prepared by zfcp */
4276                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4277                                       (char *) &fsf_req->qtcb->
4278                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4279                         zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0);
4280                         set_host_byte(&scpnt->result, DID_ERROR);
4281                         goto skip_fsfstatus;
4282                 default:
4283                         ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4284                                         "code was detected for a command. "
4285                                         "The problem occured on the unit "
4286                                         "0x%016Lx on port 0x%016Lx on "
4287                                         "adapter %s (debug info 0x%x)\n",
4288                                         unit->fcp_lun,
4289                                         unit->port->wwpn,
4290                                         zfcp_get_busid_by_unit(unit),
4291                                         fcp_rsp_info[3]);
4292                         /* dump SCSI CDB as prepared by zfcp */
4293                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4294                                       (char *) &fsf_req->qtcb->
4295                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4296                         zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0);
4297                         set_host_byte(&scpnt->result, DID_ERROR);
4298                         goto skip_fsfstatus;
4299                 }
4300         }
4301
4302         /* check for sense data */
4303         if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4304                 sns_len = FSF_FCP_RSP_SIZE -
4305                     sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4306                 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4307                                sns_len);
4308                 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4309                 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4310                                SCSI_SENSE_BUFFERSIZE);
4311                 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4312                 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4313                                scpnt->result);
4314                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4315                               (void *) &scpnt->cmnd, scpnt->cmd_len);
4316
4317                 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4318                                fcp_rsp_iu->fcp_sns_len);
4319                 memcpy(&scpnt->sense_buffer,
4320                        zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4321                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4322                               (void *) &scpnt->sense_buffer, sns_len);
4323         }
4324
4325         /* check for overrun */
4326         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4327                 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4328                               "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4329                               "The response data length is "
4330                               "%d, the original length was %d.\n",
4331                               unit->fcp_lun,
4332                               unit->port->wwpn,
4333                               zfcp_get_busid_by_unit(unit),
4334                               fcp_rsp_iu->fcp_resid,
4335                               (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4336         }
4337
4338         /* check for underrun */
4339         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4340                 ZFCP_LOG_INFO("A data underrun was detected for a command. "
4341                               "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4342                               "The response data length is "
4343                               "%d, the original length was %d.\n",
4344                               unit->fcp_lun,
4345                               unit->port->wwpn,
4346                               zfcp_get_busid_by_unit(unit),
4347                               fcp_rsp_iu->fcp_resid,
4348                               (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4349
4350                 scpnt->resid = fcp_rsp_iu->fcp_resid;
4351                 if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
4352                         set_host_byte(&scpnt->result, DID_ERROR);
4353         }
4354
4355  skip_fsfstatus:
4356         ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4357
4358         zfcp_cmd_dbf_event_scsi("response", scpnt);
4359
4360         /* cleanup pointer (need this especially for abort) */
4361         scpnt->host_scribble = NULL;
4362
4363         /*
4364          * NOTE:
4365          * according to the outcome of a discussion on linux-scsi we
4366          * don't need to grab the io_request_lock here since we use
4367          * the new eh
4368          */
4369         /* always call back */
4370
4371         (scpnt->scsi_done) (scpnt);
4372
4373         /*
4374          * We must hold this lock until scsi_done has been called.
4375          * Otherwise we may call scsi_done after abort regarding this
4376          * command has completed.
4377          * Note: scsi_done must not block!
4378          */
4379  out:
4380         read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4381         return retval;
4382 }
4383
4384 /*
4385  * function:    zfcp_fsf_send_fcp_command_task_management_handler
4386  *
4387  * purpose:     evaluates FCP_RSP IU
4388  *
4389  * returns:
4390  */
4391 static int
4392 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4393 {
4394         int retval = 0;
4395         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4396             &(fsf_req->qtcb->bottom.io.fcp_rsp);
4397         char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4398         struct zfcp_unit *unit =
4399             fsf_req->data.send_fcp_command_task_management.unit;
4400
4401         del_timer(&fsf_req->adapter->scsi_er_timer);
4402         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4403                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4404                 goto skip_fsfstatus;
4405         }
4406
4407         /* check FCP_RSP_INFO */
4408         switch (fcp_rsp_info[3]) {
4409         case RSP_CODE_GOOD:
4410                 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
4411                 /* ok, continue */
4412                 ZFCP_LOG_DEBUG("no failure or Task Management "
4413                                "Function complete\n");
4414                 break;
4415         case RSP_CODE_TASKMAN_UNSUPP:
4416                 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_UNSUPP\n");
4417                 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4418                                 "is not supported on the target device "
4419                                 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4420                                 unit->fcp_lun,
4421                                 unit->port->wwpn,
4422                                 zfcp_get_busid_by_unit(unit));
4423                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4424                 break;
4425         case RSP_CODE_TASKMAN_FAILED:
4426                 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_FAILED\n");
4427                 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4428                                 "failed to complete successfully. "
4429                                 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4430                                 unit->fcp_lun,
4431                                 unit->port->wwpn,
4432                                 zfcp_get_busid_by_unit(unit));
4433                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4434                 break;
4435         default:
4436                 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4437                                 "code was detected for a command. "
4438                                 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4439                                 "(debug info 0x%x)\n",
4440                                 unit->fcp_lun,
4441                                 unit->port->wwpn,
4442                                 zfcp_get_busid_by_unit(unit),
4443                                 fcp_rsp_info[3]);
4444                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4445         }
4446
4447       skip_fsfstatus:
4448         return retval;
4449 }
4450
4451
4452 /*
4453  * function:    zfcp_fsf_control_file
4454  *
4455  * purpose:     Initiator of the control file upload/download FSF requests
4456  *
4457  * returns:     0           - FSF request is successfuly created and queued
4458  *              -EOPNOTSUPP - The FCP adapter does not have Control File support
4459  *              -EINVAL     - Invalid direction specified
4460  *              -ENOMEM     - Insufficient memory
4461  *              -EPERM      - Cannot create FSF request or place it in QDIO queue
4462  */
4463 int
4464 zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4465                       struct zfcp_fsf_req **fsf_req_ptr,
4466                       u32 fsf_command,
4467                       u32 option,
4468                       struct zfcp_sg_list *sg_list)
4469 {
4470         struct zfcp_fsf_req *fsf_req;
4471         struct fsf_qtcb_bottom_support *bottom;
4472         volatile struct qdio_buffer_element *sbale;
4473         struct timer_list *timer;
4474         unsigned long lock_flags;
4475         int req_flags = 0;
4476         int direction;
4477         int retval = 0;
4478
4479         if (!(adapter->supported_features & FSF_FEATURE_CFDC)) {
4480                 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4481                               zfcp_get_busid_by_adapter(adapter));
4482                 retval = -EOPNOTSUPP;
4483                 goto out;
4484         }
4485
4486         switch (fsf_command) {
4487
4488         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4489                 direction = SBAL_FLAGS0_TYPE_WRITE;
4490                 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4491                     (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4492                         req_flags = ZFCP_WAIT_FOR_SBAL;
4493                 break;
4494
4495         case FSF_QTCB_UPLOAD_CONTROL_FILE:
4496                 direction = SBAL_FLAGS0_TYPE_READ;
4497                 break;
4498
4499         default:
4500                 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4501                 retval = -EINVAL;
4502                 goto out;
4503         }
4504
4505         timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4506         if (!timer) {
4507                 retval = -ENOMEM;
4508                 goto out;
4509         }
4510
4511         retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4512                                      NULL, &lock_flags, &fsf_req);
4513         if (retval < 0) {
4514                 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4515                               "adapter %s\n",
4516                         zfcp_get_busid_by_adapter(adapter));
4517                 retval = -EPERM;
4518                 goto unlock_queue_lock;
4519         }
4520
4521         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4522         sbale[0].flags |= direction;
4523
4524         bottom = &fsf_req->qtcb->bottom.support;
4525         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4526         bottom->option = option;
4527
4528         if (sg_list->count > 0) {
4529                 int bytes;
4530
4531                 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4532                                                 sg_list->sg, sg_list->count,
4533                                                 ZFCP_MAX_SBALS_PER_REQ);
4534                 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4535                         ZFCP_LOG_INFO(
4536                                 "error: Could not create sufficient number of "
4537                                 "SBALS for an FSF request to the adapter %s\n",
4538                                 zfcp_get_busid_by_adapter(adapter));
4539                         retval = -ENOMEM;
4540                         goto free_fsf_req;
4541                 }
4542         } else
4543                 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4544
4545         init_timer(timer);
4546         timer->function = zfcp_fsf_request_timeout_handler;
4547         timer->data = (unsigned long) adapter;
4548         timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4549
4550         retval = zfcp_fsf_req_send(fsf_req, timer);
4551         if (retval < 0) {
4552                 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4553                               "(adapter %s)\n",
4554                               zfcp_get_busid_by_adapter(adapter));
4555                 retval = -EPERM;
4556                 goto free_fsf_req;
4557         }
4558         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4559
4560         ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4561                         "adapter %s\n",
4562                         fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4563                         "download" : "upload",
4564                         zfcp_get_busid_by_adapter(adapter));
4565
4566         wait_event(fsf_req->completion_wq,
4567                    fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4568
4569         *fsf_req_ptr = fsf_req;
4570         del_timer_sync(timer);
4571         goto free_timer;
4572
4573  free_fsf_req:
4574         zfcp_fsf_req_free(fsf_req);
4575  unlock_queue_lock:
4576         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4577  free_timer:
4578         kfree(timer);
4579  out:
4580         return retval;
4581 }
4582
4583
4584 /*
4585  * function:    zfcp_fsf_control_file_handler
4586  *
4587  * purpose:     Handler of the control file upload/download FSF requests
4588  *
4589  * returns:     0       - FSF request successfuly processed
4590  *              -EAGAIN - Operation has to be repeated because of a temporary problem
4591  *              -EACCES - There is no permission to execute an operation
4592  *              -EPERM  - The control file is not in a right format
4593  *              -EIO    - There is a problem with the FCP adapter
4594  *              -EINVAL - Invalid operation
4595  *              -EFAULT - User space memory I/O operation fault
4596  */
4597 static int
4598 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4599 {
4600         struct zfcp_adapter *adapter = fsf_req->adapter;
4601         struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4602         struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4603         int retval = 0;
4604
4605         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4606                 retval = -EINVAL;
4607                 goto skip_fsfstatus;
4608         }
4609
4610         switch (header->fsf_status) {
4611
4612         case FSF_GOOD:
4613                 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
4614                 ZFCP_LOG_NORMAL(
4615                         "The FSF request has been successfully completed "
4616                         "on the adapter %s\n",
4617                         zfcp_get_busid_by_adapter(adapter));
4618                 break;
4619
4620         case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4621                 ZFCP_LOG_FLAGS(2, "FSF_OPERATION_PARTIALLY_SUCCESSFUL\n");
4622                 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4623                         switch (header->fsf_status_qual.word[0]) {
4624
4625                         case FSF_SQ_CFDC_HARDENED_ON_SE:
4626                                 ZFCP_LOG_NORMAL(
4627                                         "CFDC on the adapter %s has being "
4628                                         "hardened on primary and secondary SE\n",
4629                                         zfcp_get_busid_by_adapter(adapter));
4630                                 break;
4631
4632                         case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4633                                 ZFCP_LOG_NORMAL(
4634                                         "CFDC of the adapter %s could not "
4635                                         "be saved on the SE\n",
4636                                         zfcp_get_busid_by_adapter(adapter));
4637                                 break;
4638
4639                         case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4640                                 ZFCP_LOG_NORMAL(
4641                                         "CFDC of the adapter %s could not "
4642                                         "be copied to the secondary SE\n",
4643                                         zfcp_get_busid_by_adapter(adapter));
4644                                 break;
4645
4646                         default:
4647                                 ZFCP_LOG_NORMAL(
4648                                         "CFDC could not be hardened "
4649                                         "on the adapter %s\n",
4650                                         zfcp_get_busid_by_adapter(adapter));
4651                         }
4652                 }
4653                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4654                 retval = -EAGAIN;
4655                 break;
4656
4657         case FSF_AUTHORIZATION_FAILURE:
4658                 ZFCP_LOG_FLAGS(2, "FSF_AUTHORIZATION_FAILURE\n");
4659                 ZFCP_LOG_NORMAL(
4660                         "Adapter %s does not accept privileged commands\n",
4661                         zfcp_get_busid_by_adapter(adapter));
4662                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4663                 retval = -EACCES;
4664                 break;
4665
4666         case FSF_CFDC_ERROR_DETECTED:
4667                 ZFCP_LOG_FLAGS(2, "FSF_CFDC_ERROR_DETECTED\n");
4668                 ZFCP_LOG_NORMAL(
4669                         "Error at position %d in the CFDC, "
4670                         "CFDC is discarded by the adapter %s\n",
4671                         header->fsf_status_qual.word[0],
4672                         zfcp_get_busid_by_adapter(adapter));
4673                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4674                 retval = -EPERM;
4675                 break;
4676
4677         case FSF_CONTROL_FILE_UPDATE_ERROR:
4678                 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_UPDATE_ERROR\n");
4679                 ZFCP_LOG_NORMAL(
4680                         "Adapter %s cannot harden the control file, "
4681                         "file is discarded\n",
4682                         zfcp_get_busid_by_adapter(adapter));
4683                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4684                 retval = -EIO;
4685                 break;
4686
4687         case FSF_CONTROL_FILE_TOO_LARGE:
4688                 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_TOO_LARGE\n");
4689                 ZFCP_LOG_NORMAL(
4690                         "Control file is too large, file is discarded "
4691                         "by the adapter %s\n",
4692                         zfcp_get_busid_by_adapter(adapter));
4693                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4694                 retval = -EIO;
4695                 break;
4696
4697         case FSF_ACCESS_CONFLICT_DETECTED:
4698                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_CONFLICT_DETECTED\n");
4699                 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4700                         ZFCP_LOG_NORMAL(
4701                                 "CFDC has been discarded by the adapter %s, "
4702                                 "because activation would impact "
4703                                 "%d active connection(s)\n",
4704                                 zfcp_get_busid_by_adapter(adapter),
4705                                 header->fsf_status_qual.word[0]);
4706                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4707                 retval = -EIO;
4708                 break;
4709
4710         case FSF_CONFLICTS_OVERRULED:
4711                 ZFCP_LOG_FLAGS(2, "FSF_CONFLICTS_OVERRULED\n");
4712                 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4713                         ZFCP_LOG_NORMAL(
4714                                 "CFDC has been activated on the adapter %s, "
4715                                 "but activation has impacted "
4716                                 "%d active connection(s)\n",
4717                                 zfcp_get_busid_by_adapter(adapter),
4718                                 header->fsf_status_qual.word[0]);
4719                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4720                 retval = -EIO;
4721                 break;
4722
4723         case FSF_UNKNOWN_OP_SUBTYPE:
4724                 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
4725                 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4726                                 "op_subtype=0x%x)\n",
4727                                 zfcp_get_busid_by_adapter(adapter),
4728                                 bottom->operation_subtype);
4729                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4730                 retval = -EINVAL;
4731                 break;
4732
4733         case FSF_INVALID_COMMAND_OPTION:
4734                 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
4735                 ZFCP_LOG_NORMAL(
4736                         "Invalid option 0x%x has been specified "
4737                         "in QTCB bottom sent to the adapter %s\n",
4738                         bottom->option,
4739                         zfcp_get_busid_by_adapter(adapter));
4740                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4741                 retval = -EINVAL;
4742                 break;
4743
4744         default:
4745                 ZFCP_LOG_NORMAL(
4746                         "bug: An unknown/unexpected FSF status 0x%08x "
4747                         "was presented on the adapter %s\n",
4748                         header->fsf_status,
4749                         zfcp_get_busid_by_adapter(adapter));
4750                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4751                 debug_exception(fsf_req->adapter->erp_dbf, 0,
4752                         &header->fsf_status_qual.word[0], sizeof(u32));
4753                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4754                 retval = -EINVAL;
4755                 break;
4756         }
4757
4758 skip_fsfstatus:
4759         return retval;
4760 }
4761
4762
4763 /*
4764  * function:    zfcp_fsf_req_wait_and_cleanup
4765  *
4766  * purpose:
4767  *
4768  * FIXME(design): signal seems to be <0 !!!
4769  * returns:     0       - request completed (*status is valid), cleanup succ.
4770  *              <0      - request completed (*status is valid), cleanup failed
4771  *              >0      - signal which interrupted waiting (*status invalid),
4772  *                        request not completed, no cleanup
4773  *
4774  *              *status is a copy of status of completed fsf_req
4775  */
4776 int
4777 zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req,
4778                               int interruptible, u32 * status)
4779 {
4780         int retval = 0;
4781         int signal = 0;
4782
4783         if (interruptible) {
4784                 __wait_event_interruptible(fsf_req->completion_wq,
4785                                            fsf_req->status &
4786                                            ZFCP_STATUS_FSFREQ_COMPLETED,
4787                                            signal);
4788                 if (signal) {
4789                         ZFCP_LOG_DEBUG("Caught signal %i while waiting for the "
4790                                        "completion of the request at %p\n",
4791                                        signal, fsf_req);
4792                         retval = signal;
4793                         goto out;
4794                 }
4795         } else {
4796                 __wait_event(fsf_req->completion_wq,
4797                              fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4798         }
4799
4800         *status = fsf_req->status;
4801
4802         /* cleanup request */
4803         zfcp_fsf_req_cleanup(fsf_req);
4804  out:
4805         return retval;
4806 }
4807
4808 static inline int
4809 zfcp_fsf_req_sbal_check(unsigned long *flags,
4810                         struct zfcp_qdio_queue *queue, int needed)
4811 {
4812         write_lock_irqsave(&queue->queue_lock, *flags);
4813         if (likely(atomic_read(&queue->free_count) >= needed))
4814                 return 1;
4815         write_unlock_irqrestore(&queue->queue_lock, *flags);
4816         return 0;
4817 }
4818
4819 /*
4820  * set qtcb pointer in fsf_req and initialize QTCB
4821  */
4822 static inline void
4823 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd)
4824 {
4825         if (likely(fsf_req->qtcb != NULL)) {
4826                 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4827                 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4828                 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
4829                 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4830                 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
4831                 fsf_req->qtcb->header.fsf_command = fsf_cmd;
4832         }
4833 }
4834
4835 /**
4836  * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4837  * @adapter: adapter for which request queue is examined
4838  * @req_flags: flags indicating whether to wait for needed SBAL or not
4839  * @lock_flags: lock_flags if queue_lock is taken
4840  * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4841  * Locks: lock adapter->request_queue->queue_lock on success
4842  */
4843 static int
4844 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4845                       unsigned long *lock_flags)
4846 {
4847         long ret;
4848         struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4849
4850         if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4851                 ret = wait_event_interruptible_timeout(adapter->request_wq,
4852                         zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4853                                                        ZFCP_SBAL_TIMEOUT);
4854                 if (ret < 0)
4855                         return ret;
4856                 if (!ret)
4857                         return -EIO;
4858         } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4859                 return -EIO;
4860
4861         return 0;
4862 }
4863
4864 /*
4865  * function:    zfcp_fsf_req_create
4866  *
4867  * purpose:     create an FSF request at the specified adapter and
4868  *              setup common fields
4869  *
4870  * returns:     -ENOMEM if there was insufficient memory for a request
4871  *              -EIO if no qdio buffers could be allocate to the request
4872  *              -EINVAL/-EPERM on bug conditions in req_dequeue
4873  *              0 in success
4874  *
4875  * note:        The created request is returned by reference.
4876  *
4877  * locks:       lock of concerned request queue must not be held,
4878  *              but is held on completion (write, irqsave)
4879  */
4880 int
4881 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4882                     mempool_t *pool, unsigned long *lock_flags,
4883                     struct zfcp_fsf_req **fsf_req_p)
4884 {
4885         volatile struct qdio_buffer_element *sbale;
4886         struct zfcp_fsf_req *fsf_req = NULL;
4887         int ret = 0;
4888         struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4889
4890         /* allocate new FSF request */
4891         fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4892         if (unlikely(NULL == fsf_req)) {
4893                 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4894                                "the outbound (send) queue.\n");
4895                 ret = -ENOMEM;
4896                 goto failed_fsf_req;
4897         }
4898
4899         zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd);
4900
4901         /* initialize waitqueue which may be used to wait on
4902            this request completion */
4903         init_waitqueue_head(&fsf_req->completion_wq);
4904
4905         ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4906         if(ret < 0) {
4907                 goto failed_sbals;
4908         }
4909
4910         /*
4911          * We hold queue_lock here. Check if QDIOUP is set and let request fail
4912          * if it is not set (see also *_open_qdio and *_close_qdio).
4913          */
4914
4915         if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4916                 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4917                 ret = -EIO;
4918                 goto failed_sbals;
4919         }
4920
4921         fsf_req->adapter = adapter;     /* pointer to "parent" adapter */
4922         fsf_req->fsf_command = fsf_cmd;
4923         fsf_req->sbal_number = 1;
4924         fsf_req->sbal_first = req_queue->free_index;
4925         fsf_req->sbal_curr = req_queue->free_index;
4926         fsf_req->sbale_curr = 1;
4927
4928         if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4929                 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4930         }
4931
4932         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4933
4934         /* setup common SBALE fields */
4935         sbale[0].addr = fsf_req;
4936         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4937         if (likely(fsf_req->qtcb != NULL)) {
4938                 sbale[1].addr = (void *) fsf_req->qtcb;
4939                 sbale[1].length = sizeof(struct fsf_qtcb);
4940         }
4941
4942         ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4943                        fsf_req->sbal_number, fsf_req->sbal_first);
4944
4945         goto success;
4946
4947  failed_sbals:
4948 /* dequeue new FSF request previously enqueued */
4949         zfcp_fsf_req_free(fsf_req);
4950         fsf_req = NULL;
4951
4952  failed_fsf_req:
4953         write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4954  success:
4955         *fsf_req_p = fsf_req;
4956         return ret;
4957 }
4958
4959 /*
4960  * function:    zfcp_fsf_req_send
4961  *
4962  * purpose:     start transfer of FSF request via QDIO
4963  *
4964  * returns:     0 - request transfer succesfully started
4965  *              !0 - start of request transfer failed
4966  */
4967 static int
4968 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4969 {
4970         struct zfcp_adapter *adapter;
4971         struct zfcp_qdio_queue *req_queue;
4972         volatile struct qdio_buffer_element *sbale;
4973         int new_distance_from_int;
4974         unsigned long flags;
4975         int inc_seq_no = 1;
4976         int retval = 0;
4977
4978         adapter = fsf_req->adapter;
4979         req_queue = &adapter->request_queue,
4980
4981
4982         /* FIXME(debug): remove it later */
4983         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4984         ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4985         ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4986         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4987                       sbale[1].length);
4988
4989         /* set sequence counter in QTCB */
4990         if (likely(fsf_req->qtcb)) {
4991                 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4992                 fsf_req->seq_no = adapter->fsf_req_seq_no;
4993                 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets "
4994                                "FSF sequence counter value of %i\n",
4995                                fsf_req,
4996                                zfcp_get_busid_by_adapter(adapter),
4997                                fsf_req->qtcb->prefix.req_seq_no);
4998         } else
4999                 inc_seq_no = 0;
5000
5001         /* put allocated FSF request at list tail */
5002         write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
5003         list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
5004         write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
5005
5006         /* figure out expiration time of timeout and start timeout */
5007         if (unlikely(timer)) {
5008                 timer->expires += jiffies;
5009                 add_timer(timer);
5010         }
5011
5012         ZFCP_LOG_TRACE("request queue of adapter %s: "
5013                        "next free SBAL is %i, %i free SBALs\n",
5014                        zfcp_get_busid_by_adapter(adapter),
5015                        req_queue->free_index,
5016                        atomic_read(&req_queue->free_count));
5017
5018         ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
5019                        "index_in_queue=%i, count=%i, buffers=%p\n",
5020                        zfcp_get_busid_by_adapter(adapter),
5021                        QDIO_FLAG_SYNC_OUTPUT,
5022                        0, fsf_req->sbal_first, fsf_req->sbal_number,
5023                        &req_queue->buffer[fsf_req->sbal_first]);
5024
5025         /*
5026          * adjust the number of free SBALs in request queue as well as
5027          * position of first one
5028          */
5029         atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
5030         ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
5031         req_queue->free_index += fsf_req->sbal_number;    /* increase */
5032         req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q;  /* wrap if needed */
5033         new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
5034
5035         retval = do_QDIO(adapter->ccw_device,
5036                          QDIO_FLAG_SYNC_OUTPUT,
5037                          0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
5038
5039         if (unlikely(retval)) {
5040                 /* Queues are down..... */
5041                 retval = -EIO;
5042                 /*
5043                  * FIXME(potential race):
5044                  * timer might be expired (absolutely unlikely)
5045                  */
5046                 if (timer)
5047                         del_timer(timer);
5048                 write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
5049                 list_del(&fsf_req->list);
5050                 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
5051                 /*
5052                  * adjust the number of free SBALs in request queue as well as
5053                  * position of first one
5054                  */
5055                 zfcp_qdio_zero_sbals(req_queue->buffer,
5056                                      fsf_req->sbal_first, fsf_req->sbal_number);
5057                 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
5058                 req_queue->free_index -= fsf_req->sbal_number;   /* increase */
5059                 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
5060                 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
5061                 ZFCP_LOG_DEBUG
5062                         ("error: do_QDIO failed. Buffers could not be enqueued "
5063                          "to request queue.\n");
5064         } else {
5065                 req_queue->distance_from_int = new_distance_from_int;
5066                 /*
5067                  * increase FSF sequence counter -
5068                  * this must only be done for request successfully enqueued to
5069                  * QDIO this rejected requests may be cleaned up by calling
5070                  * routines  resulting in missing sequence counter values
5071                  * otherwise,
5072                  */
5073                 /* Don't increase for unsolicited status */
5074                 if (likely(inc_seq_no)) {
5075                         adapter->fsf_req_seq_no++;
5076                         ZFCP_LOG_TRACE
5077                             ("FSF sequence counter value of adapter %s "
5078                              "increased to %i\n",
5079                              zfcp_get_busid_by_adapter(adapter),
5080                              adapter->fsf_req_seq_no);
5081                 }
5082                 /* count FSF requests pending */
5083                 atomic_inc(&adapter->fsf_reqs_active);
5084         }
5085         return retval;
5086 }
5087
5088 /*
5089  * function:    zfcp_fsf_req_cleanup
5090  *
5091  * purpose:     cleans up an FSF request and removes it from the specified list
5092  *
5093  * returns:
5094  *
5095  * assumption:  no pending SB in SBALEs other than QTCB
5096  */
5097 void
5098 zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req)
5099 {
5100         struct zfcp_adapter *adapter = fsf_req->adapter;
5101         unsigned long flags;
5102
5103         write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
5104         list_del(&fsf_req->list);
5105         write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
5106         zfcp_fsf_req_free(fsf_req);
5107 }
5108
5109 #undef ZFCP_LOG_AREA