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