drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corp. 2002, 2013
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <linux/slab.h>
  14 #include <scsi/fc/fc_els.h>
  15 #include "zfcp_ext.h"
  16 #include "zfcp_fc.h"
  17 #include "zfcp_dbf.h"
  18 #include "zfcp_qdio.h"
  19 #include "zfcp_reqlist.h"
  20
  21 struct kmem_cache *zfcp_fsf_qtcb_cache;
  22
  23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  24 {
  25         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  26         zfcp_qdio_siosl(adapter);
  27         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  28                                 "fsrth_1");
  29 }
  30
  31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  32                                  unsigned long timeout)
  33 {
  34         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  35         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  36         fsf_req->timer.expires = jiffies + timeout;
  37         add_timer(&fsf_req->timer);
  38 }
  39
  40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  41 {
  42         BUG_ON(!fsf_req->erp_action);
  43         fsf_req->timer.function = zfcp_erp_timeout_handler;
  44         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  45         fsf_req->timer.expires = jiffies + 30 * HZ;
  46         add_timer(&fsf_req->timer);
  47 }
  48
  49 /* association between FSF command and FSF QTCB type */
  50 static u32 fsf_qtcb_type[] = {
  51         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  52         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  56         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  61         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  62         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  63         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  64 };
  65
  66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  67 {
  68         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  69                 "operational because of an unsupported FC class\n");
  70         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  71         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  72 }
  73
  74 /**
  75  * zfcp_fsf_req_free - free memory used by fsf request
  76  * @fsf_req: pointer to struct zfcp_fsf_req
  77  */
  78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  79 {
  80         if (likely(req->pool)) {
  81                 if (likely(req->qtcb))
  82                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  83                 mempool_free(req, req->pool);
  84                 return;
  85         }
  86
  87         if (likely(req->qtcb))
  88                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  89         kfree(req);
  90 }
  91
  92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  93 {
  94         unsigned long flags;
  95         struct fsf_status_read_buffer *sr_buf = req->data;
  96         struct zfcp_adapter *adapter = req->adapter;
  97         struct zfcp_port *port;
  98         int d_id = ntoh24(sr_buf->d_id);
  99
 100         read_lock_irqsave(&adapter->port_list_lock, flags);
 101         list_for_each_entry(port, &adapter->port_list, list)
 102                 if (port->d_id == d_id) {
 103                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 104                         break;
 105                 }
 106         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 107 }
 108
 109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 110                                          struct fsf_link_down_info *link_down)
 111 {
 112         struct zfcp_adapter *adapter = req->adapter;
 113
 114         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 115                 return;
 116
 117         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 118
 119         zfcp_scsi_schedule_rports_block(adapter);
 120
 121         if (!link_down)
 122                 goto out;
 123
 124         switch (link_down->error_code) {
 125         case FSF_PSQ_LINK_NO_LIGHT:
 126                 dev_warn(&req->adapter->ccw_device->dev,
 127                          "There is no light signal from the local "
 128                          "fibre channel cable\n");
 129                 break;
 130         case FSF_PSQ_LINK_WRAP_PLUG:
 131                 dev_warn(&req->adapter->ccw_device->dev,
 132                          "There is a wrap plug instead of a fibre "
 133                          "channel cable\n");
 134                 break;
 135         case FSF_PSQ_LINK_NO_FCP:
 136                 dev_warn(&req->adapter->ccw_device->dev,
 137                          "The adjacent fibre channel node does not "
 138                          "support FCP\n");
 139                 break;
 140         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 141                 dev_warn(&req->adapter->ccw_device->dev,
 142                          "The FCP device is suspended because of a "
 143                          "firmware update\n");
 144                 break;
 145         case FSF_PSQ_LINK_INVALID_WWPN:
 146                 dev_warn(&req->adapter->ccw_device->dev,
 147                          "The FCP device detected a WWPN that is "
 148                          "duplicate or not valid\n");
 149                 break;
 150         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 151                 dev_warn(&req->adapter->ccw_device->dev,
 152                          "The fibre channel fabric does not support NPIV\n");
 153                 break;
 154         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 155                 dev_warn(&req->adapter->ccw_device->dev,
 156                          "The FCP adapter cannot support more NPIV ports\n");
 157                 break;
 158         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 159                 dev_warn(&req->adapter->ccw_device->dev,
 160                          "The adjacent switch cannot support "
 161                          "more NPIV ports\n");
 162                 break;
 163         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "The FCP adapter could not log in to the "
 166                          "fibre channel fabric\n");
 167                 break;
 168         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The WWPN assignment file on the FCP adapter "
 171                          "has been damaged\n");
 172                 break;
 173         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The mode table on the FCP adapter "
 176                          "has been damaged\n");
 177                 break;
 178         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "All NPIV ports on the FCP adapter have "
 181                          "been assigned\n");
 182                 break;
 183         default:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "The link between the FCP adapter and "
 186                          "the FC fabric is down\n");
 187         }
 188 out:
 189         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 190 }
 191
 192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 193 {
 194         struct fsf_status_read_buffer *sr_buf = req->data;
 195         struct fsf_link_down_info *ldi =
 196                 (struct fsf_link_down_info *) &sr_buf->payload;
 197
 198         switch (sr_buf->status_subtype) {
 199         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 200                 zfcp_fsf_link_down_info_eval(req, ldi);
 201                 break;
 202         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 203                 zfcp_fsf_link_down_info_eval(req, ldi);
 204                 break;
 205         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 206                 zfcp_fsf_link_down_info_eval(req, NULL);
 207         };
 208 }
 209
 210 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 211 {
 212         struct zfcp_adapter *adapter = req->adapter;
 213         struct fsf_status_read_buffer *sr_buf = req->data;
 214
 215         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 216                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 217                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 218                 zfcp_fsf_req_free(req);
 219                 return;
 220         }
 221
 222         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 223
 224         switch (sr_buf->status_type) {
 225         case FSF_STATUS_READ_PORT_CLOSED:
 226                 zfcp_fsf_status_read_port_closed(req);
 227                 break;
 228         case FSF_STATUS_READ_INCOMING_ELS:
 229                 zfcp_fc_incoming_els(req);
 230                 break;
 231         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 232                 break;
 233         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 234                 dev_warn(&adapter->ccw_device->dev,
 235                          "The error threshold for checksum statistics "
 236                          "has been exceeded\n");
 237                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 238                 break;
 239         case FSF_STATUS_READ_LINK_DOWN:
 240                 zfcp_fsf_status_read_link_down(req);
 241                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 242                 break;
 243         case FSF_STATUS_READ_LINK_UP:
 244                 dev_info(&adapter->ccw_device->dev,
 245                          "The local link has been restored\n");
 246                 /* All ports should be marked as ready to run again */
 247                 zfcp_erp_set_adapter_status(adapter,
 248                                             ZFCP_STATUS_COMMON_RUNNING);
 249                 zfcp_erp_adapter_reopen(adapter,
 250                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 251                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 252                                         "fssrh_2");
 253                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 254
 255                 break;
 256         case FSF_STATUS_READ_NOTIFICATION_LOST:
 257                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 258                         zfcp_fc_conditional_port_scan(adapter);
 259                 break;
 260         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 261                 adapter->adapter_features = sr_buf->payload.word[0];
 262                 break;
 263         }
 264
 265         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 266         zfcp_fsf_req_free(req);
 267
 268         atomic_inc(&adapter->stat_miss);
 269         queue_work(adapter->work_queue, &adapter->stat_work);
 270 }
 271
 272 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 273 {
 274         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 275         case FSF_SQ_FCP_RSP_AVAILABLE:
 276         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 277         case FSF_SQ_NO_RETRY_POSSIBLE:
 278         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 279                 return;
 280         case FSF_SQ_COMMAND_ABORTED:
 281                 break;
 282         case FSF_SQ_NO_RECOM:
 283                 dev_err(&req->adapter->ccw_device->dev,
 284                         "The FCP adapter reported a problem "
 285                         "that cannot be recovered\n");
 286                 zfcp_qdio_siosl(req->adapter);
 287                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 288                 break;
 289         }
 290         /* all non-return stats set FSFREQ_ERROR*/
 291         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 292 }
 293
 294 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 295 {
 296         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 297                 return;
 298
 299         switch (req->qtcb->header.fsf_status) {
 300         case FSF_UNKNOWN_COMMAND:
 301                 dev_err(&req->adapter->ccw_device->dev,
 302                         "The FCP adapter does not recognize the command 0x%x\n",
 303                         req->qtcb->header.fsf_command);
 304                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 305                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 306                 break;
 307         case FSF_ADAPTER_STATUS_AVAILABLE:
 308                 zfcp_fsf_fsfstatus_qual_eval(req);
 309                 break;
 310         }
 311 }
 312
 313 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 314 {
 315         struct zfcp_adapter *adapter = req->adapter;
 316         struct fsf_qtcb *qtcb = req->qtcb;
 317         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 318
 319         zfcp_dbf_hba_fsf_response(req);
 320
 321         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 322                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 323                 return;
 324         }
 325
 326         switch (qtcb->prefix.prot_status) {
 327         case FSF_PROT_GOOD:
 328         case FSF_PROT_FSF_STATUS_PRESENTED:
 329                 return;
 330         case FSF_PROT_QTCB_VERSION_ERROR:
 331                 dev_err(&adapter->ccw_device->dev,
 332                         "QTCB version 0x%x not supported by FCP adapter "
 333                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 334                         psq->word[0], psq->word[1]);
 335                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 336                 break;
 337         case FSF_PROT_ERROR_STATE:
 338         case FSF_PROT_SEQ_NUMB_ERROR:
 339                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 340                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 341                 break;
 342         case FSF_PROT_UNSUPP_QTCB_TYPE:
 343                 dev_err(&adapter->ccw_device->dev,
 344                         "The QTCB type is not supported by the FCP adapter\n");
 345                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 346                 break;
 347         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 348                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 349                                 &adapter->status);
 350                 break;
 351         case FSF_PROT_DUPLICATE_REQUEST_ID:
 352                 dev_err(&adapter->ccw_device->dev,
 353                         "0x%Lx is an ambiguous request identifier\n",
 354                         (unsigned long long)qtcb->bottom.support.req_handle);
 355                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 356                 break;
 357         case FSF_PROT_LINK_DOWN:
 358                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 359                 /* go through reopen to flush pending requests */
 360                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 361                 break;
 362         case FSF_PROT_REEST_QUEUE:
 363                 /* All ports should be marked as ready to run again */
 364                 zfcp_erp_set_adapter_status(adapter,
 365                                             ZFCP_STATUS_COMMON_RUNNING);
 366                 zfcp_erp_adapter_reopen(adapter,
 367                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 368                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 369                                         "fspse_8");
 370                 break;
 371         default:
 372                 dev_err(&adapter->ccw_device->dev,
 373                         "0x%x is not a valid transfer protocol status\n",
 374                         qtcb->prefix.prot_status);
 375                 zfcp_qdio_siosl(adapter);
 376                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 377         }
 378         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 379 }
 380
 381 /**
 382  * zfcp_fsf_req_complete - process completion of a FSF request
 383  * @fsf_req: The FSF request that has been completed.
 384  *
 385  * When a request has been completed either from the FCP adapter,
 386  * or it has been dismissed due to a queue shutdown, this function
 387  * is called to process the completion status and trigger further
 388  * events related to the FSF request.
 389  */
 390 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 391 {
 392         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 393                 zfcp_fsf_status_read_handler(req);
 394                 return;
 395         }
 396
 397         del_timer(&req->timer);
 398         zfcp_fsf_protstatus_eval(req);
 399         zfcp_fsf_fsfstatus_eval(req);
 400         req->handler(req);
 401
 402         if (req->erp_action)
 403                 zfcp_erp_notify(req->erp_action, 0);
 404
 405         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 406                 zfcp_fsf_req_free(req);
 407         else
 408                 complete(&req->completion);
 409 }
 410
 411 /**
 412  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 413  * @adapter: pointer to struct zfcp_adapter
 414  *
 415  * Never ever call this without shutting down the adapter first.
 416  * Otherwise the adapter would continue using and corrupting s390 storage.
 417  * Included BUG_ON() call to ensure this is done.
 418  * ERP is supposed to be the only user of this function.
 419  */
 420 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 421 {
 422         struct zfcp_fsf_req *req, *tmp;
 423         LIST_HEAD(remove_queue);
 424
 425         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 426         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 427
 428         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 429                 list_del(&req->list);
 430                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 431                 zfcp_fsf_req_complete(req);
 432         }
 433 }
 434
 435 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 436 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 437 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 438 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 439 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 440 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 441 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 442
 443 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 444 {
 445         u32 fdmi_speed = 0;
 446         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 447                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 448         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 449                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 450         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 451                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 452         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 453                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 454         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 455                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 456         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 457                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 458         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 459                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 460         return fdmi_speed;
 461 }
 462
 463 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 464 {
 465         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 466         struct zfcp_adapter *adapter = req->adapter;
 467         struct Scsi_Host *shost = adapter->scsi_host;
 468         struct fc_els_flogi *nsp, *plogi;
 469
 470         /* adjust pointers for missing command code */
 471         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 472                                         - sizeof(u32));
 473         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 474                                         - sizeof(u32));
 475
 476         if (req->data)
 477                 memcpy(req->data, bottom, sizeof(*bottom));
 478
 479         fc_host_port_name(shost) = nsp->fl_wwpn;
 480         fc_host_node_name(shost) = nsp->fl_wwnn;
 481         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 482
 483         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 484         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 485                                          (u16)FSF_STATUS_READS_RECOM);
 486
 487         if (fc_host_permanent_port_name(shost) == -1)
 488                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 489
 490         zfcp_scsi_set_prot(adapter);
 491
 492         /* no error return above here, otherwise must fix call chains */
 493         /* do not evaluate invalid fields */
 494         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
 495                 return 0;
 496
 497         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 498         fc_host_speed(shost) =
 499                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
 500
 501         adapter->hydra_version = bottom->adapter_type;
 502
 503         switch (bottom->fc_topology) {
 504         case FSF_TOPO_P2P:
 505                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 506                 adapter->peer_wwpn = plogi->fl_wwpn;
 507                 adapter->peer_wwnn = plogi->fl_wwnn;
 508                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 509                 break;
 510         case FSF_TOPO_FABRIC:
 511                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 512                 break;
 513         case FSF_TOPO_AL:
 514                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 515                 /* fall through */
 516         default:
 517                 dev_err(&adapter->ccw_device->dev,
 518                         "Unknown or unsupported arbitrated loop "
 519                         "fibre channel topology detected\n");
 520                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 521                 return -EIO;
 522         }
 523
 524         return 0;
 525 }
 526
 527 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 528 {
 529         struct zfcp_adapter *adapter = req->adapter;
 530         struct fsf_qtcb *qtcb = req->qtcb;
 531         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 532         struct Scsi_Host *shost = adapter->scsi_host;
 533
 534         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 535                 return;
 536
 537         adapter->fsf_lic_version = bottom->lic_version;
 538         adapter->adapter_features = bottom->adapter_features;
 539         adapter->connection_features = bottom->connection_features;
 540         adapter->peer_wwpn = 0;
 541         adapter->peer_wwnn = 0;
 542         adapter->peer_d_id = 0;
 543
 544         switch (qtcb->header.fsf_status) {
 545         case FSF_GOOD:
 546                 if (zfcp_fsf_exchange_config_evaluate(req))
 547                         return;
 548
 549                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 550                         dev_err(&adapter->ccw_device->dev,
 551                                 "FCP adapter maximum QTCB size (%d bytes) "
 552                                 "is too small\n",
 553                                 bottom->max_qtcb_size);
 554                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 555                         return;
 556                 }
 557                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 558                                 &adapter->status);
 559                 break;
 560         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 561                 fc_host_node_name(shost) = 0;
 562                 fc_host_port_name(shost) = 0;
 563                 fc_host_port_id(shost) = 0;
 564                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 565                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 566                 adapter->hydra_version = 0;
 567
 568                 /* avoids adapter shutdown to be able to recognize
 569                  * events such as LINK UP */
 570                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 571                                 &adapter->status);
 572                 zfcp_fsf_link_down_info_eval(req,
 573                         &qtcb->header.fsf_status_qual.link_down_info);
 574                 if (zfcp_fsf_exchange_config_evaluate(req))
 575                         return;
 576                 break;
 577         default:
 578                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 579                 return;
 580         }
 581
 582         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 583                 adapter->hardware_version = bottom->hardware_version;
 584                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 585                        min(FC_SERIAL_NUMBER_SIZE, 17));
 586                 EBCASC(fc_host_serial_number(shost),
 587                        min(FC_SERIAL_NUMBER_SIZE, 17));
 588         }
 589
 590         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 591                 dev_err(&adapter->ccw_device->dev,
 592                         "The FCP adapter only supports newer "
 593                         "control block versions\n");
 594                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 595                 return;
 596         }
 597         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 598                 dev_err(&adapter->ccw_device->dev,
 599                         "The FCP adapter only supports older "
 600                         "control block versions\n");
 601                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 602         }
 603 }
 604
 605 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 606 {
 607         struct zfcp_adapter *adapter = req->adapter;
 608         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 609         struct Scsi_Host *shost = adapter->scsi_host;
 610
 611         if (req->data)
 612                 memcpy(req->data, bottom, sizeof(*bottom));
 613
 614         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 615                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 616                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 617         } else
 618                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 619         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 620         fc_host_supported_speeds(shost) =
 621                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
 622         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 623                FC_FC4_LIST_SIZE);
 624         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 625                FC_FC4_LIST_SIZE);
 626 }
 627
 628 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 629 {
 630         struct fsf_qtcb *qtcb = req->qtcb;
 631
 632         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 633                 return;
 634
 635         switch (qtcb->header.fsf_status) {
 636         case FSF_GOOD:
 637                 zfcp_fsf_exchange_port_evaluate(req);
 638                 break;
 639         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 640                 zfcp_fsf_exchange_port_evaluate(req);
 641                 zfcp_fsf_link_down_info_eval(req,
 642                         &qtcb->header.fsf_status_qual.link_down_info);
 643                 break;
 644         }
 645 }
 646
 647 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 648 {
 649         struct zfcp_fsf_req *req;
 650
 651         if (likely(pool))
 652                 req = mempool_alloc(pool, GFP_ATOMIC);
 653         else
 654                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 655
 656         if (unlikely(!req))
 657                 return NULL;
 658
 659         memset(req, 0, sizeof(*req));
 660         req->pool = pool;
 661         return req;
 662 }
 663
 664 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 665 {
 666         struct fsf_qtcb *qtcb;
 667
 668         if (likely(pool))
 669                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 670         else
 671                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 672
 673         if (unlikely(!qtcb))
 674                 return NULL;
 675
 676         memset(qtcb, 0, sizeof(*qtcb));
 677         return qtcb;
 678 }
 679
 680 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 681                                                 u32 fsf_cmd, u8 sbtype,
 682                                                 mempool_t *pool)
 683 {
 684         struct zfcp_adapter *adapter = qdio->adapter;
 685         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 686
 687         if (unlikely(!req))
 688                 return ERR_PTR(-ENOMEM);
 689
 690         if (adapter->req_no == 0)
 691                 adapter->req_no++;
 692
 693         INIT_LIST_HEAD(&req->list);
 694         init_timer(&req->timer);
 695         init_completion(&req->completion);
 696
 697         req->adapter = adapter;
 698         req->fsf_command = fsf_cmd;
 699         req->req_id = adapter->req_no;
 700
 701         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 702                 if (likely(pool))
 703                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 704                 else
 705                         req->qtcb = zfcp_qtcb_alloc(NULL);
 706
 707                 if (unlikely(!req->qtcb)) {
 708                         zfcp_fsf_req_free(req);
 709                         return ERR_PTR(-ENOMEM);
 710                 }
 711
 712                 req->seq_no = adapter->fsf_req_seq_no;
 713                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 714                 req->qtcb->prefix.req_id = req->req_id;
 715                 req->qtcb->prefix.ulp_info = 26;
 716                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 717                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 718                 req->qtcb->header.req_handle = req->req_id;
 719                 req->qtcb->header.fsf_command = req->fsf_command;
 720         }
 721
 722         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 723                            req->qtcb, sizeof(struct fsf_qtcb));
 724
 725         return req;
 726 }
 727
 728 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 729 {
 730         struct zfcp_adapter *adapter = req->adapter;
 731         struct zfcp_qdio *qdio = adapter->qdio;
 732         int with_qtcb = (req->qtcb != NULL);
 733         int req_id = req->req_id;
 734
 735         zfcp_reqlist_add(adapter->req_list, req);
 736
 737         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 738         req->issued = get_tod_clock();
 739         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 740                 del_timer(&req->timer);
 741                 /* lookup request again, list might have changed */
 742                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 743                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 744                 return -EIO;
 745         }
 746
 747         /* Don't increase for unsolicited status */
 748         if (with_qtcb)
 749                 adapter->fsf_req_seq_no++;
 750         adapter->req_no++;
 751
 752         return 0;
 753 }
 754
 755 /**
 756  * zfcp_fsf_status_read - send status read request
 757  * @adapter: pointer to struct zfcp_adapter
 758  * @req_flags: request flags
 759  * Returns: 0 on success, ERROR otherwise
 760  */
 761 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 762 {
 763         struct zfcp_adapter *adapter = qdio->adapter;
 764         struct zfcp_fsf_req *req;
 765         struct fsf_status_read_buffer *sr_buf;
 766         struct page *page;
 767         int retval = -EIO;
 768
 769         spin_lock_irq(&qdio->req_q_lock);
 770         if (zfcp_qdio_sbal_get(qdio))
 771                 goto out;
 772
 773         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 774                                   SBAL_SFLAGS0_TYPE_STATUS,
 775                                   adapter->pool.status_read_req);
 776         if (IS_ERR(req)) {
 777                 retval = PTR_ERR(req);
 778                 goto out;
 779         }
 780
 781         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 782         if (!page) {
 783                 retval = -ENOMEM;
 784                 goto failed_buf;
 785         }
 786         sr_buf = page_address(page);
 787         memset(sr_buf, 0, sizeof(*sr_buf));
 788         req->data = sr_buf;
 789
 790         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 791         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 792
 793         retval = zfcp_fsf_req_send(req);
 794         if (retval)
 795                 goto failed_req_send;
 796
 797         goto out;
 798
 799 failed_req_send:
 800         req->data = NULL;
 801         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 802 failed_buf:
 803         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 804         zfcp_fsf_req_free(req);
 805 out:
 806         spin_unlock_irq(&qdio->req_q_lock);
 807         return retval;
 808 }
 809
 810 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 811 {
 812         struct scsi_device *sdev = req->data;
 813         struct zfcp_scsi_dev *zfcp_sdev;
 814         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 815
 816         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 817                 return;
 818
 819         zfcp_sdev = sdev_to_zfcp(sdev);
 820
 821         switch (req->qtcb->header.fsf_status) {
 822         case FSF_PORT_HANDLE_NOT_VALID:
 823                 if (fsq->word[0] == fsq->word[1]) {
 824                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 825                                                 "fsafch1");
 826                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 827                 }
 828                 break;
 829         case FSF_LUN_HANDLE_NOT_VALID:
 830                 if (fsq->word[0] == fsq->word[1]) {
 831                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 832                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 833                 }
 834                 break;
 835         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 836                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 837                 break;
 838         case FSF_PORT_BOXED:
 839                 zfcp_erp_set_port_status(zfcp_sdev->port,
 840                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 841                 zfcp_erp_port_reopen(zfcp_sdev->port,
 842                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 843                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 844                 break;
 845         case FSF_LUN_BOXED:
 846                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 847                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 848                                     "fsafch4");
 849                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 850                 break;
 851         case FSF_ADAPTER_STATUS_AVAILABLE:
 852                 switch (fsq->word[0]) {
 853                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 854                         zfcp_fc_test_link(zfcp_sdev->port);
 855                         /* fall through */
 856                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 857                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 858                         break;
 859                 }
 860                 break;
 861         case FSF_GOOD:
 862                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 863                 break;
 864         }
 865 }
 866
 867 /**
 868  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 869  * @scmnd: The SCSI command to abort
 870  * Returns: pointer to struct zfcp_fsf_req
 871  */
 872
 873 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 874 {
 875         struct zfcp_fsf_req *req = NULL;
 876         struct scsi_device *sdev = scmnd->device;
 877         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 878         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 879         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 880
 881         spin_lock_irq(&qdio->req_q_lock);
 882         if (zfcp_qdio_sbal_get(qdio))
 883                 goto out;
 884         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 885                                   SBAL_SFLAGS0_TYPE_READ,
 886                                   qdio->adapter->pool.scsi_abort);
 887         if (IS_ERR(req)) {
 888                 req = NULL;
 889                 goto out;
 890         }
 891
 892         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 893                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 894                 goto out_error_free;
 895
 896         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 897
 898         req->data = sdev;
 899         req->handler = zfcp_fsf_abort_fcp_command_handler;
 900         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 901         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 902         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 903
 904         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 905         if (!zfcp_fsf_req_send(req))
 906                 goto out;
 907
 908 out_error_free:
 909         zfcp_fsf_req_free(req);
 910         req = NULL;
 911 out:
 912         spin_unlock_irq(&qdio->req_q_lock);
 913         return req;
 914 }
 915
 916 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 917 {
 918         struct zfcp_adapter *adapter = req->adapter;
 919         struct zfcp_fsf_ct_els *ct = req->data;
 920         struct fsf_qtcb_header *header = &req->qtcb->header;
 921
 922         ct->status = -EINVAL;
 923
 924         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 925                 goto skip_fsfstatus;
 926
 927         switch (header->fsf_status) {
 928         case FSF_GOOD:
 929                 zfcp_dbf_san_res("fsscth2", req);
 930                 ct->status = 0;
 931                 break;
 932         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 933                 zfcp_fsf_class_not_supp(req);
 934                 break;
 935         case FSF_ADAPTER_STATUS_AVAILABLE:
 936                 switch (header->fsf_status_qual.word[0]){
 937                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 938                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 939                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 940                         break;
 941                 }
 942                 break;
 943         case FSF_PORT_BOXED:
 944                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 945                 break;
 946         case FSF_PORT_HANDLE_NOT_VALID:
 947                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 948                 /* fall through */
 949         case FSF_GENERIC_COMMAND_REJECTED:
 950         case FSF_PAYLOAD_SIZE_MISMATCH:
 951         case FSF_REQUEST_SIZE_TOO_LARGE:
 952         case FSF_RESPONSE_SIZE_TOO_LARGE:
 953         case FSF_SBAL_MISMATCH:
 954                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 955                 break;
 956         }
 957
 958 skip_fsfstatus:
 959         if (ct->handler)
 960                 ct->handler(ct->handler_data);
 961 }
 962
 963 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 964                                             struct zfcp_qdio_req *q_req,
 965                                             struct scatterlist *sg_req,
 966                                             struct scatterlist *sg_resp)
 967 {
 968         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 969         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 970         zfcp_qdio_set_sbale_last(qdio, q_req);
 971 }
 972
 973 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 974                                        struct scatterlist *sg_req,
 975                                        struct scatterlist *sg_resp)
 976 {
 977         struct zfcp_adapter *adapter = req->adapter;
 978         struct zfcp_qdio *qdio = adapter->qdio;
 979         struct fsf_qtcb *qtcb = req->qtcb;
 980         u32 feat = adapter->adapter_features;
 981
 982         if (zfcp_adapter_multi_buffer_active(adapter)) {
 983                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 984                         return -EIO;
 985                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 986                         return -EIO;
 987
 988                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
 989                                         zfcp_qdio_sbale_count(sg_req));
 990                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 991                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
 992                 return 0;
 993         }
 994
 995         /* use single, unchained SBAL if it can hold the request */
 996         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 997                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
 998                                                 sg_req, sg_resp);
 999                 return 0;
1000         }
1001
1002         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1003                 return -EOPNOTSUPP;
1004
1005         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1006                 return -EIO;
1007
1008         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1009
1010         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1011         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1012
1013         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1014                 return -EIO;
1015
1016         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1017
1018         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1019
1020         return 0;
1021 }
1022
1023 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1024                                  struct scatterlist *sg_req,
1025                                  struct scatterlist *sg_resp,
1026                                  unsigned int timeout)
1027 {
1028         int ret;
1029
1030         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1031         if (ret)
1032                 return ret;
1033
1034         /* common settings for ct/gs and els requests */
1035         if (timeout > 255)
1036                 timeout = 255; /* max value accepted by hardware */
1037         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1038         req->qtcb->bottom.support.timeout = timeout;
1039         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1040
1041         return 0;
1042 }
1043
1044 /**
1045  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1046  * @ct: pointer to struct zfcp_send_ct with data for request
1047  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1048  */
1049 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1050                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1051                      unsigned int timeout)
1052 {
1053         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1054         struct zfcp_fsf_req *req;
1055         int ret = -EIO;
1056
1057         spin_lock_irq(&qdio->req_q_lock);
1058         if (zfcp_qdio_sbal_get(qdio))
1059                 goto out;
1060
1061         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1062                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1063
1064         if (IS_ERR(req)) {
1065                 ret = PTR_ERR(req);
1066                 goto out;
1067         }
1068
1069         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1070         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1071         if (ret)
1072                 goto failed_send;
1073
1074         req->handler = zfcp_fsf_send_ct_handler;
1075         req->qtcb->header.port_handle = wka_port->handle;
1076         req->data = ct;
1077
1078         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1079
1080         ret = zfcp_fsf_req_send(req);
1081         if (ret)
1082                 goto failed_send;
1083
1084         goto out;
1085
1086 failed_send:
1087         zfcp_fsf_req_free(req);
1088 out:
1089         spin_unlock_irq(&qdio->req_q_lock);
1090         return ret;
1091 }
1092
1093 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1094 {
1095         struct zfcp_fsf_ct_els *send_els = req->data;
1096         struct fsf_qtcb_header *header = &req->qtcb->header;
1097
1098         send_els->status = -EINVAL;
1099
1100         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1101                 goto skip_fsfstatus;
1102
1103         switch (header->fsf_status) {
1104         case FSF_GOOD:
1105                 zfcp_dbf_san_res("fsselh1", req);
1106                 send_els->status = 0;
1107                 break;
1108         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1109                 zfcp_fsf_class_not_supp(req);
1110                 break;
1111         case FSF_ADAPTER_STATUS_AVAILABLE:
1112                 switch (header->fsf_status_qual.word[0]){
1113                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1114                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1115                 case FSF_SQ_RETRY_IF_POSSIBLE:
1116                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1117                         break;
1118                 }
1119                 break;
1120         case FSF_ELS_COMMAND_REJECTED:
1121         case FSF_PAYLOAD_SIZE_MISMATCH:
1122         case FSF_REQUEST_SIZE_TOO_LARGE:
1123         case FSF_RESPONSE_SIZE_TOO_LARGE:
1124                 break;
1125         case FSF_SBAL_MISMATCH:
1126                 /* should never occur, avoided in zfcp_fsf_send_els */
1127                 /* fall through */
1128         default:
1129                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1130                 break;
1131         }
1132 skip_fsfstatus:
1133         if (send_els->handler)
1134                 send_els->handler(send_els->handler_data);
1135 }
1136
1137 /**
1138  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1139  * @els: pointer to struct zfcp_send_els with data for the command
1140  */
1141 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1142                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1143 {
1144         struct zfcp_fsf_req *req;
1145         struct zfcp_qdio *qdio = adapter->qdio;
1146         int ret = -EIO;
1147
1148         spin_lock_irq(&qdio->req_q_lock);
1149         if (zfcp_qdio_sbal_get(qdio))
1150                 goto out;
1151
1152         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1153                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1154
1155         if (IS_ERR(req)) {
1156                 ret = PTR_ERR(req);
1157                 goto out;
1158         }
1159
1160         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1161
1162         if (!zfcp_adapter_multi_buffer_active(adapter))
1163                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1164
1165         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1166
1167         if (ret)
1168                 goto failed_send;
1169
1170         hton24(req->qtcb->bottom.support.d_id, d_id);
1171         req->handler = zfcp_fsf_send_els_handler;
1172         req->data = els;
1173
1174         zfcp_dbf_san_req("fssels1", req, d_id);
1175
1176         ret = zfcp_fsf_req_send(req);
1177         if (ret)
1178                 goto failed_send;
1179
1180         goto out;
1181
1182 failed_send:
1183         zfcp_fsf_req_free(req);
1184 out:
1185         spin_unlock_irq(&qdio->req_q_lock);
1186         return ret;
1187 }
1188
1189 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1190 {
1191         struct zfcp_fsf_req *req;
1192         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1193         int retval = -EIO;
1194
1195         spin_lock_irq(&qdio->req_q_lock);
1196         if (zfcp_qdio_sbal_get(qdio))
1197                 goto out;
1198
1199         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1200                                   SBAL_SFLAGS0_TYPE_READ,
1201                                   qdio->adapter->pool.erp_req);
1202
1203         if (IS_ERR(req)) {
1204                 retval = PTR_ERR(req);
1205                 goto out;
1206         }
1207
1208         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1209         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1210
1211         req->qtcb->bottom.config.feature_selection =
1212                         FSF_FEATURE_NOTIFICATION_LOST |
1213                         FSF_FEATURE_UPDATE_ALERT;
1214         req->erp_action = erp_action;
1215         req->handler = zfcp_fsf_exchange_config_data_handler;
1216         erp_action->fsf_req_id = req->req_id;
1217
1218         zfcp_fsf_start_erp_timer(req);
1219         retval = zfcp_fsf_req_send(req);
1220         if (retval) {
1221                 zfcp_fsf_req_free(req);
1222                 erp_action->fsf_req_id = 0;
1223         }
1224 out:
1225         spin_unlock_irq(&qdio->req_q_lock);
1226         return retval;
1227 }
1228
1229 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1230                                        struct fsf_qtcb_bottom_config *data)
1231 {
1232         struct zfcp_fsf_req *req = NULL;
1233         int retval = -EIO;
1234
1235         spin_lock_irq(&qdio->req_q_lock);
1236         if (zfcp_qdio_sbal_get(qdio))
1237                 goto out_unlock;
1238
1239         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1240                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1241
1242         if (IS_ERR(req)) {
1243                 retval = PTR_ERR(req);
1244                 goto out_unlock;
1245         }
1246
1247         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1248         req->handler = zfcp_fsf_exchange_config_data_handler;
1249
1250         req->qtcb->bottom.config.feature_selection =
1251                         FSF_FEATURE_NOTIFICATION_LOST |
1252                         FSF_FEATURE_UPDATE_ALERT;
1253
1254         if (data)
1255                 req->data = data;
1256
1257         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1258         retval = zfcp_fsf_req_send(req);
1259         spin_unlock_irq(&qdio->req_q_lock);
1260         if (!retval)
1261                 wait_for_completion(&req->completion);
1262
1263         zfcp_fsf_req_free(req);
1264         return retval;
1265
1266 out_unlock:
1267         spin_unlock_irq(&qdio->req_q_lock);
1268         return retval;
1269 }
1270
1271 /**
1272  * zfcp_fsf_exchange_port_data - request information about local port
1273  * @erp_action: ERP action for the adapter for which port data is requested
1274  * Returns: 0 on success, error otherwise
1275  */
1276 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1277 {
1278         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1279         struct zfcp_fsf_req *req;
1280         int retval = -EIO;
1281
1282         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1283                 return -EOPNOTSUPP;
1284
1285         spin_lock_irq(&qdio->req_q_lock);
1286         if (zfcp_qdio_sbal_get(qdio))
1287                 goto out;
1288
1289         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1290                                   SBAL_SFLAGS0_TYPE_READ,
1291                                   qdio->adapter->pool.erp_req);
1292
1293         if (IS_ERR(req)) {
1294                 retval = PTR_ERR(req);
1295                 goto out;
1296         }
1297
1298         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1299         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1300
1301         req->handler = zfcp_fsf_exchange_port_data_handler;
1302         req->erp_action = erp_action;
1303         erp_action->fsf_req_id = req->req_id;
1304
1305         zfcp_fsf_start_erp_timer(req);
1306         retval = zfcp_fsf_req_send(req);
1307         if (retval) {
1308                 zfcp_fsf_req_free(req);
1309                 erp_action->fsf_req_id = 0;
1310         }
1311 out:
1312         spin_unlock_irq(&qdio->req_q_lock);
1313         return retval;
1314 }
1315
1316 /**
1317  * zfcp_fsf_exchange_port_data_sync - request information about local port
1318  * @qdio: pointer to struct zfcp_qdio
1319  * @data: pointer to struct fsf_qtcb_bottom_port
1320  * Returns: 0 on success, error otherwise
1321  */
1322 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1323                                      struct fsf_qtcb_bottom_port *data)
1324 {
1325         struct zfcp_fsf_req *req = NULL;
1326         int retval = -EIO;
1327
1328         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1329                 return -EOPNOTSUPP;
1330
1331         spin_lock_irq(&qdio->req_q_lock);
1332         if (zfcp_qdio_sbal_get(qdio))
1333                 goto out_unlock;
1334
1335         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1336                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1337
1338         if (IS_ERR(req)) {
1339                 retval = PTR_ERR(req);
1340                 goto out_unlock;
1341         }
1342
1343         if (data)
1344                 req->data = data;
1345
1346         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1347
1348         req->handler = zfcp_fsf_exchange_port_data_handler;
1349         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1350         retval = zfcp_fsf_req_send(req);
1351         spin_unlock_irq(&qdio->req_q_lock);
1352
1353         if (!retval)
1354                 wait_for_completion(&req->completion);
1355
1356         zfcp_fsf_req_free(req);
1357
1358         return retval;
1359
1360 out_unlock:
1361         spin_unlock_irq(&qdio->req_q_lock);
1362         return retval;
1363 }
1364
1365 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1366 {
1367         struct zfcp_port *port = req->data;
1368         struct fsf_qtcb_header *header = &req->qtcb->header;
1369         struct fc_els_flogi *plogi;
1370
1371         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1372                 goto out;
1373
1374         switch (header->fsf_status) {
1375         case FSF_PORT_ALREADY_OPEN:
1376                 break;
1377         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1378                 dev_warn(&req->adapter->ccw_device->dev,
1379                          "Not enough FCP adapter resources to open "
1380                          "remote port 0x%016Lx\n",
1381                          (unsigned long long)port->wwpn);
1382                 zfcp_erp_set_port_status(port,
1383                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1384                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1385                 break;
1386         case FSF_ADAPTER_STATUS_AVAILABLE:
1387                 switch (header->fsf_status_qual.word[0]) {
1388                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1389                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1390                 case FSF_SQ_NO_RETRY_POSSIBLE:
1391                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1392                         break;
1393                 }
1394                 break;
1395         case FSF_GOOD:
1396                 port->handle = header->port_handle;
1397                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1398                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1399                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1400                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1401                                   &port->status);
1402                 /* check whether D_ID has changed during open */
1403                 /*
1404                  * FIXME: This check is not airtight, as the FCP channel does
1405                  * not monitor closures of target port connections caused on
1406                  * the remote side. Thus, they might miss out on invalidating
1407                  * locally cached WWPNs (and other N_Port parameters) of gone
1408                  * target ports. So, our heroic attempt to make things safe
1409                  * could be undermined by 'open port' response data tagged with
1410                  * obsolete WWPNs. Another reason to monitor potential
1411                  * connection closures ourself at least (by interpreting
1412                  * incoming ELS' and unsolicited status). It just crosses my
1413                  * mind that one should be able to cross-check by means of
1414                  * another GID_PN straight after a port has been opened.
1415                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1416                  */
1417                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1418                 if (req->qtcb->bottom.support.els1_length >=
1419                     FSF_PLOGI_MIN_LEN)
1420                                 zfcp_fc_plogi_evaluate(port, plogi);
1421                 break;
1422         case FSF_UNKNOWN_OP_SUBTYPE:
1423                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1424                 break;
1425         }
1426
1427 out:
1428         put_device(&port->dev);
1429 }
1430
1431 /**
1432  * zfcp_fsf_open_port - create and send open port request
1433  * @erp_action: pointer to struct zfcp_erp_action
1434  * Returns: 0 on success, error otherwise
1435  */
1436 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1437 {
1438         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1439         struct zfcp_port *port = erp_action->port;
1440         struct zfcp_fsf_req *req;
1441         int retval = -EIO;
1442
1443         spin_lock_irq(&qdio->req_q_lock);
1444         if (zfcp_qdio_sbal_get(qdio))
1445                 goto out;
1446
1447         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1448                                   SBAL_SFLAGS0_TYPE_READ,
1449                                   qdio->adapter->pool.erp_req);
1450
1451         if (IS_ERR(req)) {
1452                 retval = PTR_ERR(req);
1453                 goto out;
1454         }
1455
1456         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1457         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1458
1459         req->handler = zfcp_fsf_open_port_handler;
1460         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1461         req->data = port;
1462         req->erp_action = erp_action;
1463         erp_action->fsf_req_id = req->req_id;
1464         get_device(&port->dev);
1465
1466         zfcp_fsf_start_erp_timer(req);
1467         retval = zfcp_fsf_req_send(req);
1468         if (retval) {
1469                 zfcp_fsf_req_free(req);
1470                 erp_action->fsf_req_id = 0;
1471                 put_device(&port->dev);
1472         }
1473 out:
1474         spin_unlock_irq(&qdio->req_q_lock);
1475         return retval;
1476 }
1477
1478 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1479 {
1480         struct zfcp_port *port = req->data;
1481
1482         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1483                 return;
1484
1485         switch (req->qtcb->header.fsf_status) {
1486         case FSF_PORT_HANDLE_NOT_VALID:
1487                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1488                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1489                 break;
1490         case FSF_ADAPTER_STATUS_AVAILABLE:
1491                 break;
1492         case FSF_GOOD:
1493                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1494                 break;
1495         }
1496 }
1497
1498 /**
1499  * zfcp_fsf_close_port - create and send close port request
1500  * @erp_action: pointer to struct zfcp_erp_action
1501  * Returns: 0 on success, error otherwise
1502  */
1503 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1504 {
1505         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1506         struct zfcp_fsf_req *req;
1507         int retval = -EIO;
1508
1509         spin_lock_irq(&qdio->req_q_lock);
1510         if (zfcp_qdio_sbal_get(qdio))
1511                 goto out;
1512
1513         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1514                                   SBAL_SFLAGS0_TYPE_READ,
1515                                   qdio->adapter->pool.erp_req);
1516
1517         if (IS_ERR(req)) {
1518                 retval = PTR_ERR(req);
1519                 goto out;
1520         }
1521
1522         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1523         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1524
1525         req->handler = zfcp_fsf_close_port_handler;
1526         req->data = erp_action->port;
1527         req->erp_action = erp_action;
1528         req->qtcb->header.port_handle = erp_action->port->handle;
1529         erp_action->fsf_req_id = req->req_id;
1530
1531         zfcp_fsf_start_erp_timer(req);
1532         retval = zfcp_fsf_req_send(req);
1533         if (retval) {
1534                 zfcp_fsf_req_free(req);
1535                 erp_action->fsf_req_id = 0;
1536         }
1537 out:
1538         spin_unlock_irq(&qdio->req_q_lock);
1539         return retval;
1540 }
1541
1542 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1543 {
1544         struct zfcp_fc_wka_port *wka_port = req->data;
1545         struct fsf_qtcb_header *header = &req->qtcb->header;
1546
1547         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1548                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1549                 goto out;
1550         }
1551
1552         switch (header->fsf_status) {
1553         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1554                 dev_warn(&req->adapter->ccw_device->dev,
1555                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1556                 /* fall through */
1557         case FSF_ADAPTER_STATUS_AVAILABLE:
1558                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1559                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1560                 break;
1561         case FSF_GOOD:
1562                 wka_port->handle = header->port_handle;
1563                 /* fall through */
1564         case FSF_PORT_ALREADY_OPEN:
1565                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1566         }
1567 out:
1568         wake_up(&wka_port->completion_wq);
1569 }
1570
1571 /**
1572  * zfcp_fsf_open_wka_port - create and send open wka-port request
1573  * @wka_port: pointer to struct zfcp_fc_wka_port
1574  * Returns: 0 on success, error otherwise
1575  */
1576 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1577 {
1578         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1579         struct zfcp_fsf_req *req;
1580         int retval = -EIO;
1581
1582         spin_lock_irq(&qdio->req_q_lock);
1583         if (zfcp_qdio_sbal_get(qdio))
1584                 goto out;
1585
1586         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1587                                   SBAL_SFLAGS0_TYPE_READ,
1588                                   qdio->adapter->pool.erp_req);
1589
1590         if (IS_ERR(req)) {
1591                 retval = PTR_ERR(req);
1592                 goto out;
1593         }
1594
1595         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1596         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1597
1598         req->handler = zfcp_fsf_open_wka_port_handler;
1599         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1600         req->data = wka_port;
1601
1602         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1603         retval = zfcp_fsf_req_send(req);
1604         if (retval)
1605                 zfcp_fsf_req_free(req);
1606 out:
1607         spin_unlock_irq(&qdio->req_q_lock);
1608         return retval;
1609 }
1610
1611 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1612 {
1613         struct zfcp_fc_wka_port *wka_port = req->data;
1614
1615         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1616                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1617                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1618         }
1619
1620         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1621         wake_up(&wka_port->completion_wq);
1622 }
1623
1624 /**
1625  * zfcp_fsf_close_wka_port - create and send close wka port request
1626  * @wka_port: WKA port to open
1627  * Returns: 0 on success, error otherwise
1628  */
1629 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1630 {
1631         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1632         struct zfcp_fsf_req *req;
1633         int retval = -EIO;
1634
1635         spin_lock_irq(&qdio->req_q_lock);
1636         if (zfcp_qdio_sbal_get(qdio))
1637                 goto out;
1638
1639         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1640                                   SBAL_SFLAGS0_TYPE_READ,
1641                                   qdio->adapter->pool.erp_req);
1642
1643         if (IS_ERR(req)) {
1644                 retval = PTR_ERR(req);
1645                 goto out;
1646         }
1647
1648         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1649         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1650
1651         req->handler = zfcp_fsf_close_wka_port_handler;
1652         req->data = wka_port;
1653         req->qtcb->header.port_handle = wka_port->handle;
1654
1655         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1656         retval = zfcp_fsf_req_send(req);
1657         if (retval)
1658                 zfcp_fsf_req_free(req);
1659 out:
1660         spin_unlock_irq(&qdio->req_q_lock);
1661         return retval;
1662 }
1663
1664 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1665 {
1666         struct zfcp_port *port = req->data;
1667         struct fsf_qtcb_header *header = &req->qtcb->header;
1668         struct scsi_device *sdev;
1669
1670         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1671                 return;
1672
1673         switch (header->fsf_status) {
1674         case FSF_PORT_HANDLE_NOT_VALID:
1675                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1676                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1677                 break;
1678         case FSF_PORT_BOXED:
1679                 /* can't use generic zfcp_erp_modify_port_status because
1680                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1681                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1682                 shost_for_each_device(sdev, port->adapter->scsi_host)
1683                         if (sdev_to_zfcp(sdev)->port == port)
1684                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1685                                                   &sdev_to_zfcp(sdev)->status);
1686                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1687                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1688                                      "fscpph2");
1689                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1690                 break;
1691         case FSF_ADAPTER_STATUS_AVAILABLE:
1692                 switch (header->fsf_status_qual.word[0]) {
1693                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1694                         /* fall through */
1695                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1696                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1697                         break;
1698                 }
1699                 break;
1700         case FSF_GOOD:
1701                 /* can't use generic zfcp_erp_modify_port_status because
1702                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1703                  */
1704                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1705                 shost_for_each_device(sdev, port->adapter->scsi_host)
1706                         if (sdev_to_zfcp(sdev)->port == port)
1707                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1708                                                   &sdev_to_zfcp(sdev)->status);
1709                 break;
1710         }
1711 }
1712
1713 /**
1714  * zfcp_fsf_close_physical_port - close physical port
1715  * @erp_action: pointer to struct zfcp_erp_action
1716  * Returns: 0 on success
1717  */
1718 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1719 {
1720         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1721         struct zfcp_fsf_req *req;
1722         int retval = -EIO;
1723
1724         spin_lock_irq(&qdio->req_q_lock);
1725         if (zfcp_qdio_sbal_get(qdio))
1726                 goto out;
1727
1728         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1729                                   SBAL_SFLAGS0_TYPE_READ,
1730                                   qdio->adapter->pool.erp_req);
1731
1732         if (IS_ERR(req)) {
1733                 retval = PTR_ERR(req);
1734                 goto out;
1735         }
1736
1737         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1738         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1739
1740         req->data = erp_action->port;
1741         req->qtcb->header.port_handle = erp_action->port->handle;
1742         req->erp_action = erp_action;
1743         req->handler = zfcp_fsf_close_physical_port_handler;
1744         erp_action->fsf_req_id = req->req_id;
1745
1746         zfcp_fsf_start_erp_timer(req);
1747         retval = zfcp_fsf_req_send(req);
1748         if (retval) {
1749                 zfcp_fsf_req_free(req);
1750                 erp_action->fsf_req_id = 0;
1751         }
1752 out:
1753         spin_unlock_irq(&qdio->req_q_lock);
1754         return retval;
1755 }
1756
1757 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1758 {
1759         struct zfcp_adapter *adapter = req->adapter;
1760         struct scsi_device *sdev = req->data;
1761         struct zfcp_scsi_dev *zfcp_sdev;
1762         struct fsf_qtcb_header *header = &req->qtcb->header;
1763         union fsf_status_qual *qual = &header->fsf_status_qual;
1764
1765         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1766                 return;
1767
1768         zfcp_sdev = sdev_to_zfcp(sdev);
1769
1770         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1771                           ZFCP_STATUS_COMMON_ACCESS_BOXED,
1772                           &zfcp_sdev->status);
1773
1774         switch (header->fsf_status) {
1775
1776         case FSF_PORT_HANDLE_NOT_VALID:
1777                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1778                 /* fall through */
1779         case FSF_LUN_ALREADY_OPEN:
1780                 break;
1781         case FSF_PORT_BOXED:
1782                 zfcp_erp_set_port_status(zfcp_sdev->port,
1783                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1784                 zfcp_erp_port_reopen(zfcp_sdev->port,
1785                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1786                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1787                 break;
1788         case FSF_LUN_SHARING_VIOLATION:
1789                 if (qual->word[0])
1790                         dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1791                                  "LUN 0x%Lx on port 0x%Lx is already in "
1792                                  "use by CSS%d, MIF Image ID %x\n",
1793                                  zfcp_scsi_dev_lun(sdev),
1794                                  (unsigned long long)zfcp_sdev->port->wwpn,
1795                                  qual->fsf_queue_designator.cssid,
1796                                  qual->fsf_queue_designator.hla);
1797                 zfcp_erp_set_lun_status(sdev,
1798                                         ZFCP_STATUS_COMMON_ERP_FAILED |
1799                                         ZFCP_STATUS_COMMON_ACCESS_DENIED);
1800                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1801                 break;
1802         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1803                 dev_warn(&adapter->ccw_device->dev,
1804                          "No handle is available for LUN "
1805                          "0x%016Lx on port 0x%016Lx\n",
1806                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1807                          (unsigned long long)zfcp_sdev->port->wwpn);
1808                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1809                 /* fall through */
1810         case FSF_INVALID_COMMAND_OPTION:
1811                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1812                 break;
1813         case FSF_ADAPTER_STATUS_AVAILABLE:
1814                 switch (header->fsf_status_qual.word[0]) {
1815                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1816                         zfcp_fc_test_link(zfcp_sdev->port);
1817                         /* fall through */
1818                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1819                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1820                         break;
1821                 }
1822                 break;
1823
1824         case FSF_GOOD:
1825                 zfcp_sdev->lun_handle = header->lun_handle;
1826                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1827                 break;
1828         }
1829 }
1830
1831 /**
1832  * zfcp_fsf_open_lun - open LUN
1833  * @erp_action: pointer to struct zfcp_erp_action
1834  * Returns: 0 on success, error otherwise
1835  */
1836 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1837 {
1838         struct zfcp_adapter *adapter = erp_action->adapter;
1839         struct zfcp_qdio *qdio = adapter->qdio;
1840         struct zfcp_fsf_req *req;
1841         int retval = -EIO;
1842
1843         spin_lock_irq(&qdio->req_q_lock);
1844         if (zfcp_qdio_sbal_get(qdio))
1845                 goto out;
1846
1847         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1848                                   SBAL_SFLAGS0_TYPE_READ,
1849                                   adapter->pool.erp_req);
1850
1851         if (IS_ERR(req)) {
1852                 retval = PTR_ERR(req);
1853                 goto out;
1854         }
1855
1856         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1857         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1858
1859         req->qtcb->header.port_handle = erp_action->port->handle;
1860         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1861         req->handler = zfcp_fsf_open_lun_handler;
1862         req->data = erp_action->sdev;
1863         req->erp_action = erp_action;
1864         erp_action->fsf_req_id = req->req_id;
1865
1866         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1867                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1868
1869         zfcp_fsf_start_erp_timer(req);
1870         retval = zfcp_fsf_req_send(req);
1871         if (retval) {
1872                 zfcp_fsf_req_free(req);
1873                 erp_action->fsf_req_id = 0;
1874         }
1875 out:
1876         spin_unlock_irq(&qdio->req_q_lock);
1877         return retval;
1878 }
1879
1880 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1881 {
1882         struct scsi_device *sdev = req->data;
1883         struct zfcp_scsi_dev *zfcp_sdev;
1884
1885         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1886                 return;
1887
1888         zfcp_sdev = sdev_to_zfcp(sdev);
1889
1890         switch (req->qtcb->header.fsf_status) {
1891         case FSF_PORT_HANDLE_NOT_VALID:
1892                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1893                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1894                 break;
1895         case FSF_LUN_HANDLE_NOT_VALID:
1896                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1897                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1898                 break;
1899         case FSF_PORT_BOXED:
1900                 zfcp_erp_set_port_status(zfcp_sdev->port,
1901                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1902                 zfcp_erp_port_reopen(zfcp_sdev->port,
1903                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1904                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1905                 break;
1906         case FSF_ADAPTER_STATUS_AVAILABLE:
1907                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1908                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1909                         zfcp_fc_test_link(zfcp_sdev->port);
1910                         /* fall through */
1911                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1912                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1913                         break;
1914                 }
1915                 break;
1916         case FSF_GOOD:
1917                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1918                 break;
1919         }
1920 }
1921
1922 /**
1923  * zfcp_fsf_close_LUN - close LUN
1924  * @erp_action: pointer to erp_action triggering the "close LUN"
1925  * Returns: 0 on success, error otherwise
1926  */
1927 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1928 {
1929         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1930         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1931         struct zfcp_fsf_req *req;
1932         int retval = -EIO;
1933
1934         spin_lock_irq(&qdio->req_q_lock);
1935         if (zfcp_qdio_sbal_get(qdio))
1936                 goto out;
1937
1938         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1939                                   SBAL_SFLAGS0_TYPE_READ,
1940                                   qdio->adapter->pool.erp_req);
1941
1942         if (IS_ERR(req)) {
1943                 retval = PTR_ERR(req);
1944                 goto out;
1945         }
1946
1947         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1948         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1949
1950         req->qtcb->header.port_handle = erp_action->port->handle;
1951         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1952         req->handler = zfcp_fsf_close_lun_handler;
1953         req->data = erp_action->sdev;
1954         req->erp_action = erp_action;
1955         erp_action->fsf_req_id = req->req_id;
1956
1957         zfcp_fsf_start_erp_timer(req);
1958         retval = zfcp_fsf_req_send(req);
1959         if (retval) {
1960                 zfcp_fsf_req_free(req);
1961                 erp_action->fsf_req_id = 0;
1962         }
1963 out:
1964         spin_unlock_irq(&qdio->req_q_lock);
1965         return retval;
1966 }
1967
1968 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1969 {
1970         lat_rec->sum += lat;
1971         lat_rec->min = min(lat_rec->min, lat);
1972         lat_rec->max = max(lat_rec->max, lat);
1973 }
1974
1975 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1976 {
1977         struct fsf_qual_latency_info *lat_in;
1978         struct latency_cont *lat = NULL;
1979         struct zfcp_scsi_dev *zfcp_sdev;
1980         struct zfcp_blk_drv_data blktrc;
1981         int ticks = req->adapter->timer_ticks;
1982
1983         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1984
1985         blktrc.flags = 0;
1986         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1987         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1988                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1989         blktrc.inb_usage = 0;
1990         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1991
1992         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1993             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1994                 zfcp_sdev = sdev_to_zfcp(scsi->device);
1995                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1996                 blktrc.channel_lat = lat_in->channel_lat * ticks;
1997                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1998
1999                 switch (req->qtcb->bottom.io.data_direction) {
2000                 case FSF_DATADIR_DIF_READ_STRIP:
2001                 case FSF_DATADIR_DIF_READ_CONVERT:
2002                 case FSF_DATADIR_READ:
2003                         lat = &zfcp_sdev->latencies.read;
2004                         break;
2005                 case FSF_DATADIR_DIF_WRITE_INSERT:
2006                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2007                 case FSF_DATADIR_WRITE:
2008                         lat = &zfcp_sdev->latencies.write;
2009                         break;
2010                 case FSF_DATADIR_CMND:
2011                         lat = &zfcp_sdev->latencies.cmd;
2012                         break;
2013                 }
2014
2015                 if (lat) {
2016                         spin_lock(&zfcp_sdev->latencies.lock);
2017                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2018                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2019                         lat->counter++;
2020                         spin_unlock(&zfcp_sdev->latencies.lock);
2021                 }
2022         }
2023
2024         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2025                             sizeof(blktrc));
2026 }
2027
2028 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2029 {
2030         struct scsi_cmnd *scmnd = req->data;
2031         struct scsi_device *sdev = scmnd->device;
2032         struct zfcp_scsi_dev *zfcp_sdev;
2033         struct fsf_qtcb_header *header = &req->qtcb->header;
2034
2035         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2036                 return;
2037
2038         zfcp_sdev = sdev_to_zfcp(sdev);
2039
2040         switch (header->fsf_status) {
2041         case FSF_HANDLE_MISMATCH:
2042         case FSF_PORT_HANDLE_NOT_VALID:
2043                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2044                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2045                 break;
2046         case FSF_FCPLUN_NOT_VALID:
2047         case FSF_LUN_HANDLE_NOT_VALID:
2048                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2049                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2050                 break;
2051         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2052                 zfcp_fsf_class_not_supp(req);
2053                 break;
2054         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2055                 dev_err(&req->adapter->ccw_device->dev,
2056                         "Incorrect direction %d, LUN 0x%016Lx on port "
2057                         "0x%016Lx closed\n",
2058                         req->qtcb->bottom.io.data_direction,
2059                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2060                         (unsigned long long)zfcp_sdev->port->wwpn);
2061                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2062                                           "fssfch3");
2063                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2064                 break;
2065         case FSF_CMND_LENGTH_NOT_VALID:
2066                 dev_err(&req->adapter->ccw_device->dev,
2067                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2068                         "port 0x%016Lx closed\n",
2069                         req->qtcb->bottom.io.fcp_cmnd_length,
2070                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2071                         (unsigned long long)zfcp_sdev->port->wwpn);
2072                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2073                                           "fssfch4");
2074                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2075                 break;
2076         case FSF_PORT_BOXED:
2077                 zfcp_erp_set_port_status(zfcp_sdev->port,
2078                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2079                 zfcp_erp_port_reopen(zfcp_sdev->port,
2080                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2081                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2082                 break;
2083         case FSF_LUN_BOXED:
2084                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2085                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2086                                     "fssfch6");
2087                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2088                 break;
2089         case FSF_ADAPTER_STATUS_AVAILABLE:
2090                 if (header->fsf_status_qual.word[0] ==
2091                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2092                         zfcp_fc_test_link(zfcp_sdev->port);
2093                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2094                 break;
2095         }
2096 }
2097
2098 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2099 {
2100         struct scsi_cmnd *scpnt;
2101         struct fcp_resp_with_ext *fcp_rsp;
2102         unsigned long flags;
2103
2104         read_lock_irqsave(&req->adapter->abort_lock, flags);
2105
2106         scpnt = req->data;
2107         if (unlikely(!scpnt)) {
2108                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2109                 return;
2110         }
2111
2112         zfcp_fsf_fcp_handler_common(req);
2113
2114         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2115                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2116                 goto skip_fsfstatus;
2117         }
2118
2119         switch (req->qtcb->header.fsf_status) {
2120         case FSF_INCONSISTENT_PROT_DATA:
2121         case FSF_INVALID_PROT_PARM:
2122                 set_host_byte(scpnt, DID_ERROR);
2123                 goto skip_fsfstatus;
2124         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2125                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2126                 goto skip_fsfstatus;
2127         case FSF_APP_TAG_CHECK_FAILURE:
2128                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2129                 goto skip_fsfstatus;
2130         case FSF_REF_TAG_CHECK_FAILURE:
2131                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2132                 goto skip_fsfstatus;
2133         }
2134         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2135         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2136
2137 skip_fsfstatus:
2138         zfcp_fsf_req_trace(req, scpnt);
2139         zfcp_dbf_scsi_result(scpnt, req);
2140
2141         scpnt->host_scribble = NULL;
2142         (scpnt->scsi_done) (scpnt);
2143         /*
2144          * We must hold this lock until scsi_done has been called.
2145          * Otherwise we may call scsi_done after abort regarding this
2146          * command has completed.
2147          * Note: scsi_done must not block!
2148          */
2149         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2150 }
2151
2152 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2153 {
2154         switch (scsi_get_prot_op(scsi_cmnd)) {
2155         case SCSI_PROT_NORMAL:
2156                 switch (scsi_cmnd->sc_data_direction) {
2157                 case DMA_NONE:
2158                         *data_dir = FSF_DATADIR_CMND;
2159                         break;
2160                 case DMA_FROM_DEVICE:
2161                         *data_dir = FSF_DATADIR_READ;
2162                         break;
2163                 case DMA_TO_DEVICE:
2164                         *data_dir = FSF_DATADIR_WRITE;
2165                         break;
2166                 case DMA_BIDIRECTIONAL:
2167                         return -EINVAL;
2168                 }
2169                 break;
2170
2171         case SCSI_PROT_READ_STRIP:
2172                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2173                 break;
2174         case SCSI_PROT_WRITE_INSERT:
2175                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2176                 break;
2177         case SCSI_PROT_READ_PASS:
2178                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2179                 break;
2180         case SCSI_PROT_WRITE_PASS:
2181                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2182                 break;
2183         default:
2184                 return -EINVAL;
2185         }
2186
2187         return 0;
2188 }
2189
2190 /**
2191  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2192  * @scsi_cmnd: scsi command to be sent
2193  */
2194 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2195 {
2196         struct zfcp_fsf_req *req;
2197         struct fcp_cmnd *fcp_cmnd;
2198         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2199         int retval = -EIO;
2200         struct scsi_device *sdev = scsi_cmnd->device;
2201         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2202         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2203         struct zfcp_qdio *qdio = adapter->qdio;
2204         struct fsf_qtcb_bottom_io *io;
2205         unsigned long flags;
2206
2207         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2208                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2209                 return -EBUSY;
2210
2211         spin_lock_irqsave(&qdio->req_q_lock, flags);
2212         if (atomic_read(&qdio->req_q_free) <= 0) {
2213                 atomic_inc(&qdio->req_q_full);
2214                 goto out;
2215         }
2216
2217         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2218                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2219
2220         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2221                                   sbtype, adapter->pool.scsi_req);
2222
2223         if (IS_ERR(req)) {
2224                 retval = PTR_ERR(req);
2225                 goto out;
2226         }
2227
2228         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2229
2230         io = &req->qtcb->bottom.io;
2231         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2232         req->data = scsi_cmnd;
2233         req->handler = zfcp_fsf_fcp_cmnd_handler;
2234         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2235         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2236         io->service_class = FSF_CLASS_3;
2237         io->fcp_cmnd_length = FCP_CMND_LEN;
2238
2239         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2240                 io->data_block_length = scsi_cmnd->device->sector_size;
2241                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2242         }
2243
2244         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2245                 goto failed_scsi_cmnd;
2246
2247         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2248         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2249
2250         if (scsi_prot_sg_count(scsi_cmnd)) {
2251                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2252                                        scsi_prot_sg_count(scsi_cmnd));
2253                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2254                                                  scsi_prot_sglist(scsi_cmnd));
2255                 if (retval)
2256                         goto failed_scsi_cmnd;
2257                 io->prot_data_length = zfcp_qdio_real_bytes(
2258                                                 scsi_prot_sglist(scsi_cmnd));
2259         }
2260
2261         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2262                                          scsi_sglist(scsi_cmnd));
2263         if (unlikely(retval))
2264                 goto failed_scsi_cmnd;
2265
2266         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2267         if (zfcp_adapter_multi_buffer_active(adapter))
2268                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2269
2270         retval = zfcp_fsf_req_send(req);
2271         if (unlikely(retval))
2272                 goto failed_scsi_cmnd;
2273
2274         goto out;
2275
2276 failed_scsi_cmnd:
2277         zfcp_fsf_req_free(req);
2278         scsi_cmnd->host_scribble = NULL;
2279 out:
2280         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2281         return retval;
2282 }
2283
2284 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2285 {
2286         struct fcp_resp_with_ext *fcp_rsp;
2287         struct fcp_resp_rsp_info *rsp_info;
2288
2289         zfcp_fsf_fcp_handler_common(req);
2290
2291         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2292         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2293
2294         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2295              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2296                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2297 }
2298
2299 /**
2300  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2301  * @scmnd: SCSI command to send the task management command for
2302  * @tm_flags: unsigned byte for task management flags
2303  * Returns: on success pointer to struct fsf_req, NULL otherwise
2304  */
2305 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2306                                             u8 tm_flags)
2307 {
2308         struct zfcp_fsf_req *req = NULL;
2309         struct fcp_cmnd *fcp_cmnd;
2310         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2311         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2312
2313         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2314                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2315                 return NULL;
2316
2317         spin_lock_irq(&qdio->req_q_lock);
2318         if (zfcp_qdio_sbal_get(qdio))
2319                 goto out;
2320
2321         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2322                                   SBAL_SFLAGS0_TYPE_WRITE,
2323                                   qdio->adapter->pool.scsi_req);
2324
2325         if (IS_ERR(req)) {
2326                 req = NULL;
2327                 goto out;
2328         }
2329
2330         req->data = scmnd;
2331         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2332         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2333         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2334         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2335         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2336         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2337
2338         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2339
2340         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2341         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2342
2343         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2344         if (!zfcp_fsf_req_send(req))
2345                 goto out;
2346
2347         zfcp_fsf_req_free(req);
2348         req = NULL;
2349 out:
2350         spin_unlock_irq(&qdio->req_q_lock);
2351         return req;
2352 }
2353
2354 /**
2355  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2356  * @adapter: pointer to struct zfcp_adapter
2357  * @sbal_idx: response queue index of SBAL to be processed
2358  */
2359 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2360 {
2361         struct zfcp_adapter *adapter = qdio->adapter;
2362         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2363         struct qdio_buffer_element *sbale;
2364         struct zfcp_fsf_req *fsf_req;
2365         unsigned long req_id;
2366         int idx;
2367
2368         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2369
2370                 sbale = &sbal->element[idx];
2371                 req_id = (unsigned long) sbale->addr;
2372                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2373
2374                 if (!fsf_req) {
2375                         /*
2376                          * Unknown request means that we have potentially memory
2377                          * corruption and must stop the machine immediately.
2378                          */
2379                         zfcp_qdio_siosl(adapter);
2380                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2381                               req_id, dev_name(&adapter->ccw_device->dev));
2382                 }
2383
2384                 fsf_req->qdio_req.sbal_response = sbal_idx;
2385                 zfcp_fsf_req_complete(fsf_req);
2386
2387                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2388                         break;
2389         }
2390 }