drivers/s390/scsi/zfcp_fsf.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * zfcp device driver
   4  *
   5  * Implementation of FSF commands.
   6  *
   7  * Copyright IBM Corp. 2002, 2017
   8  */
   9
  10 #define KMSG_COMPONENT "zfcp"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/blktrace_api.h>
  14 #include <linux/slab.h>
  15 #include <scsi/fc/fc_els.h>
  16 #include "zfcp_ext.h"
  17 #include "zfcp_fc.h"
  18 #include "zfcp_dbf.h"
  19 #include "zfcp_qdio.h"
  20 #include "zfcp_reqlist.h"
  21
  22 struct kmem_cache *zfcp_fsf_qtcb_cache;
  23
  24 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  25 {
  26         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  27         zfcp_qdio_siosl(adapter);
  28         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  29                                 "fsrth_1");
  30 }
  31
  32 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  33                                  unsigned long timeout)
  34 {
  35         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  36         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  37         fsf_req->timer.expires = jiffies + timeout;
  38         add_timer(&fsf_req->timer);
  39 }
  40
  41 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  42 {
  43         BUG_ON(!fsf_req->erp_action);
  44         fsf_req->timer.function = zfcp_erp_timeout_handler;
  45         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  46         fsf_req->timer.expires = jiffies + 30 * HZ;
  47         add_timer(&fsf_req->timer);
  48 }
  49
  50 /* association between FSF command and FSF QTCB type */
  51 static u32 fsf_qtcb_type[] = {
  52         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  53         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  56         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  61         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  62         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  63         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  64         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  65 };
  66
  67 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  68 {
  69         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  70                 "operational because of an unsupported FC class\n");
  71         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  72         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  73 }
  74
  75 /**
  76  * zfcp_fsf_req_free - free memory used by fsf request
  77  * @fsf_req: pointer to struct zfcp_fsf_req
  78  */
  79 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  80 {
  81         if (likely(req->pool)) {
  82                 if (likely(req->qtcb))
  83                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  84                 mempool_free(req, req->pool);
  85                 return;
  86         }
  87
  88         if (likely(req->qtcb))
  89                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  90         kfree(req);
  91 }
  92
  93 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  94 {
  95         unsigned long flags;
  96         struct fsf_status_read_buffer *sr_buf = req->data;
  97         struct zfcp_adapter *adapter = req->adapter;
  98         struct zfcp_port *port;
  99         int d_id = ntoh24(sr_buf->d_id);
 100
 101         read_lock_irqsave(&adapter->port_list_lock, flags);
 102         list_for_each_entry(port, &adapter->port_list, list)
 103                 if (port->d_id == d_id) {
 104                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 105                         break;
 106                 }
 107         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 108 }
 109
 110 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 111                                          struct fsf_link_down_info *link_down)
 112 {
 113         struct zfcp_adapter *adapter = req->adapter;
 114
 115         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 116                 return;
 117
 118         atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 119
 120         zfcp_scsi_schedule_rports_block(adapter);
 121
 122         if (!link_down)
 123                 goto out;
 124
 125         switch (link_down->error_code) {
 126         case FSF_PSQ_LINK_NO_LIGHT:
 127                 dev_warn(&req->adapter->ccw_device->dev,
 128                          "There is no light signal from the local "
 129                          "fibre channel cable\n");
 130                 break;
 131         case FSF_PSQ_LINK_WRAP_PLUG:
 132                 dev_warn(&req->adapter->ccw_device->dev,
 133                          "There is a wrap plug instead of a fibre "
 134                          "channel cable\n");
 135                 break;
 136         case FSF_PSQ_LINK_NO_FCP:
 137                 dev_warn(&req->adapter->ccw_device->dev,
 138                          "The adjacent fibre channel node does not "
 139                          "support FCP\n");
 140                 break;
 141         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 142                 dev_warn(&req->adapter->ccw_device->dev,
 143                          "The FCP device is suspended because of a "
 144                          "firmware update\n");
 145                 break;
 146         case FSF_PSQ_LINK_INVALID_WWPN:
 147                 dev_warn(&req->adapter->ccw_device->dev,
 148                          "The FCP device detected a WWPN that is "
 149                          "duplicate or not valid\n");
 150                 break;
 151         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 152                 dev_warn(&req->adapter->ccw_device->dev,
 153                          "The fibre channel fabric does not support NPIV\n");
 154                 break;
 155         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 156                 dev_warn(&req->adapter->ccw_device->dev,
 157                          "The FCP adapter cannot support more NPIV ports\n");
 158                 break;
 159         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 160                 dev_warn(&req->adapter->ccw_device->dev,
 161                          "The adjacent switch cannot support "
 162                          "more NPIV ports\n");
 163                 break;
 164         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 165                 dev_warn(&req->adapter->ccw_device->dev,
 166                          "The FCP adapter could not log in to the "
 167                          "fibre channel fabric\n");
 168                 break;
 169         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 170                 dev_warn(&req->adapter->ccw_device->dev,
 171                          "The WWPN assignment file on the FCP adapter "
 172                          "has been damaged\n");
 173                 break;
 174         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 175                 dev_warn(&req->adapter->ccw_device->dev,
 176                          "The mode table on the FCP adapter "
 177                          "has been damaged\n");
 178                 break;
 179         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 180                 dev_warn(&req->adapter->ccw_device->dev,
 181                          "All NPIV ports on the FCP adapter have "
 182                          "been assigned\n");
 183                 break;
 184         default:
 185                 dev_warn(&req->adapter->ccw_device->dev,
 186                          "The link between the FCP adapter and "
 187                          "the FC fabric is down\n");
 188         }
 189 out:
 190         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 191 }
 192
 193 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 194 {
 195         struct fsf_status_read_buffer *sr_buf = req->data;
 196         struct fsf_link_down_info *ldi =
 197                 (struct fsf_link_down_info *) &sr_buf->payload;
 198
 199         switch (sr_buf->status_subtype) {
 200         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 201         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 202                 zfcp_fsf_link_down_info_eval(req, ldi);
 203                 break;
 204         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 205                 zfcp_fsf_link_down_info_eval(req, NULL);
 206         }
 207 }
 208
 209 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 210 {
 211         struct zfcp_adapter *adapter = req->adapter;
 212         struct fsf_status_read_buffer *sr_buf = req->data;
 213
 214         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 215                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 216                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 217                 zfcp_fsf_req_free(req);
 218                 return;
 219         }
 220
 221         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 222
 223         switch (sr_buf->status_type) {
 224         case FSF_STATUS_READ_PORT_CLOSED:
 225                 zfcp_fsf_status_read_port_closed(req);
 226                 break;
 227         case FSF_STATUS_READ_INCOMING_ELS:
 228                 zfcp_fc_incoming_els(req);
 229                 break;
 230         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 231                 break;
 232         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 233                 dev_warn(&adapter->ccw_device->dev,
 234                          "The error threshold for checksum statistics "
 235                          "has been exceeded\n");
 236                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 237                 break;
 238         case FSF_STATUS_READ_LINK_DOWN:
 239                 zfcp_fsf_status_read_link_down(req);
 240                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 241                 break;
 242         case FSF_STATUS_READ_LINK_UP:
 243                 dev_info(&adapter->ccw_device->dev,
 244                          "The local link has been restored\n");
 245                 /* All ports should be marked as ready to run again */
 246                 zfcp_erp_set_adapter_status(adapter,
 247                                             ZFCP_STATUS_COMMON_RUNNING);
 248                 zfcp_erp_adapter_reopen(adapter,
 249                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 250                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 251                                         "fssrh_2");
 252                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 253
 254                 break;
 255         case FSF_STATUS_READ_NOTIFICATION_LOST:
 256                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 257                         zfcp_fc_conditional_port_scan(adapter);
 258                 break;
 259         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 260                 adapter->adapter_features = sr_buf->payload.word[0];
 261                 break;
 262         }
 263
 264         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 265         zfcp_fsf_req_free(req);
 266
 267         atomic_inc(&adapter->stat_miss);
 268         queue_work(adapter->work_queue, &adapter->stat_work);
 269 }
 270
 271 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 272 {
 273         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 274         case FSF_SQ_FCP_RSP_AVAILABLE:
 275         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 276         case FSF_SQ_NO_RETRY_POSSIBLE:
 277         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 278                 return;
 279         case FSF_SQ_COMMAND_ABORTED:
 280                 break;
 281         case FSF_SQ_NO_RECOM:
 282                 dev_err(&req->adapter->ccw_device->dev,
 283                         "The FCP adapter reported a problem "
 284                         "that cannot be recovered\n");
 285                 zfcp_qdio_siosl(req->adapter);
 286                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 287                 break;
 288         }
 289         /* all non-return stats set FSFREQ_ERROR*/
 290         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 291 }
 292
 293 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 294 {
 295         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 296                 return;
 297
 298         switch (req->qtcb->header.fsf_status) {
 299         case FSF_UNKNOWN_COMMAND:
 300                 dev_err(&req->adapter->ccw_device->dev,
 301                         "The FCP adapter does not recognize the command 0x%x\n",
 302                         req->qtcb->header.fsf_command);
 303                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 304                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 305                 break;
 306         case FSF_ADAPTER_STATUS_AVAILABLE:
 307                 zfcp_fsf_fsfstatus_qual_eval(req);
 308                 break;
 309         }
 310 }
 311
 312 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 313 {
 314         struct zfcp_adapter *adapter = req->adapter;
 315         struct fsf_qtcb *qtcb = req->qtcb;
 316         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 317
 318         zfcp_dbf_hba_fsf_response(req);
 319
 320         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 321                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 322                 return;
 323         }
 324
 325         switch (qtcb->prefix.prot_status) {
 326         case FSF_PROT_GOOD:
 327         case FSF_PROT_FSF_STATUS_PRESENTED:
 328                 return;
 329         case FSF_PROT_QTCB_VERSION_ERROR:
 330                 dev_err(&adapter->ccw_device->dev,
 331                         "QTCB version 0x%x not supported by FCP adapter "
 332                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 333                         psq->word[0], psq->word[1]);
 334                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 335                 break;
 336         case FSF_PROT_ERROR_STATE:
 337         case FSF_PROT_SEQ_NUMB_ERROR:
 338                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 339                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 340                 break;
 341         case FSF_PROT_UNSUPP_QTCB_TYPE:
 342                 dev_err(&adapter->ccw_device->dev,
 343                         "The QTCB type is not supported by the FCP adapter\n");
 344                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 345                 break;
 346         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 347                 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 348                                 &adapter->status);
 349                 break;
 350         case FSF_PROT_DUPLICATE_REQUEST_ID:
 351                 dev_err(&adapter->ccw_device->dev,
 352                         "0x%Lx is an ambiguous request identifier\n",
 353                         (unsigned long long)qtcb->bottom.support.req_handle);
 354                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 355                 break;
 356         case FSF_PROT_LINK_DOWN:
 357                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 358                 /* go through reopen to flush pending requests */
 359                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 360                 break;
 361         case FSF_PROT_REEST_QUEUE:
 362                 /* All ports should be marked as ready to run again */
 363                 zfcp_erp_set_adapter_status(adapter,
 364                                             ZFCP_STATUS_COMMON_RUNNING);
 365                 zfcp_erp_adapter_reopen(adapter,
 366                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 367                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 368                                         "fspse_8");
 369                 break;
 370         default:
 371                 dev_err(&adapter->ccw_device->dev,
 372                         "0x%x is not a valid transfer protocol status\n",
 373                         qtcb->prefix.prot_status);
 374                 zfcp_qdio_siosl(adapter);
 375                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 376         }
 377         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 378 }
 379
 380 /**
 381  * zfcp_fsf_req_complete - process completion of a FSF request
 382  * @fsf_req: The FSF request that has been completed.
 383  *
 384  * When a request has been completed either from the FCP adapter,
 385  * or it has been dismissed due to a queue shutdown, this function
 386  * is called to process the completion status and trigger further
 387  * events related to the FSF request.
 388  */
 389 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 390 {
 391         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 392                 zfcp_fsf_status_read_handler(req);
 393                 return;
 394         }
 395
 396         del_timer(&req->timer);
 397         zfcp_fsf_protstatus_eval(req);
 398         zfcp_fsf_fsfstatus_eval(req);
 399         req->handler(req);
 400
 401         if (req->erp_action)
 402                 zfcp_erp_notify(req->erp_action, 0);
 403
 404         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 405                 zfcp_fsf_req_free(req);
 406         else
 407                 complete(&req->completion);
 408 }
 409
 410 /**
 411  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 412  * @adapter: pointer to struct zfcp_adapter
 413  *
 414  * Never ever call this without shutting down the adapter first.
 415  * Otherwise the adapter would continue using and corrupting s390 storage.
 416  * Included BUG_ON() call to ensure this is done.
 417  * ERP is supposed to be the only user of this function.
 418  */
 419 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 420 {
 421         struct zfcp_fsf_req *req, *tmp;
 422         LIST_HEAD(remove_queue);
 423
 424         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 425         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 426
 427         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 428                 list_del(&req->list);
 429                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 430                 zfcp_fsf_req_complete(req);
 431         }
 432 }
 433
 434 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 435 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 436 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 437 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 438 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 439 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 440 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 441
 442 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 443 {
 444         u32 fdmi_speed = 0;
 445         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 446                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 447         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 448                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 449         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 450                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 451         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 452                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 453         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 454                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 455         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 456                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 457         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 458                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 459         return fdmi_speed;
 460 }
 461
 462 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 463 {
 464         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 465         struct zfcp_adapter *adapter = req->adapter;
 466         struct Scsi_Host *shost = adapter->scsi_host;
 467         struct fc_els_flogi *nsp, *plogi;
 468
 469         /* adjust pointers for missing command code */
 470         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 471                                         - sizeof(u32));
 472         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 473                                         - sizeof(u32));
 474
 475         if (req->data)
 476                 memcpy(req->data, bottom, sizeof(*bottom));
 477
 478         fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn);
 479         fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn);
 480         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 481
 482         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 483         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 484                                          (u16)FSF_STATUS_READS_RECOM);
 485
 486         if (fc_host_permanent_port_name(shost) == -1)
 487                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 488
 489         zfcp_scsi_set_prot(adapter);
 490
 491         /* no error return above here, otherwise must fix call chains */
 492         /* do not evaluate invalid fields */
 493         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
 494                 return 0;
 495
 496         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 497         fc_host_speed(shost) =
 498                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
 499
 500         adapter->hydra_version = bottom->adapter_type;
 501
 502         switch (bottom->fc_topology) {
 503         case FSF_TOPO_P2P:
 504                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 505                 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
 506                 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
 507                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 508                 break;
 509         case FSF_TOPO_FABRIC:
 510                 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
 511                         fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 512                 else
 513                         fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 514                 break;
 515         case FSF_TOPO_AL:
 516                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 517                 /* fall through */
 518         default:
 519                 dev_err(&adapter->ccw_device->dev,
 520                         "Unknown or unsupported arbitrated loop "
 521                         "fibre channel topology detected\n");
 522                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 523                 return -EIO;
 524         }
 525
 526         return 0;
 527 }
 528
 529 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 530 {
 531         struct zfcp_adapter *adapter = req->adapter;
 532         struct fsf_qtcb *qtcb = req->qtcb;
 533         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 534         struct Scsi_Host *shost = adapter->scsi_host;
 535
 536         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 537                 return;
 538
 539         adapter->fsf_lic_version = bottom->lic_version;
 540         adapter->adapter_features = bottom->adapter_features;
 541         adapter->connection_features = bottom->connection_features;
 542         adapter->peer_wwpn = 0;
 543         adapter->peer_wwnn = 0;
 544         adapter->peer_d_id = 0;
 545
 546         switch (qtcb->header.fsf_status) {
 547         case FSF_GOOD:
 548                 if (zfcp_fsf_exchange_config_evaluate(req))
 549                         return;
 550
 551                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 552                         dev_err(&adapter->ccw_device->dev,
 553                                 "FCP adapter maximum QTCB size (%d bytes) "
 554                                 "is too small\n",
 555                                 bottom->max_qtcb_size);
 556                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 557                         return;
 558                 }
 559                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 560                                 &adapter->status);
 561                 break;
 562         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 563                 fc_host_node_name(shost) = 0;
 564                 fc_host_port_name(shost) = 0;
 565                 fc_host_port_id(shost) = 0;
 566                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 567                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 568                 adapter->hydra_version = 0;
 569
 570                 /* avoids adapter shutdown to be able to recognize
 571                  * events such as LINK UP */
 572                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 573                                 &adapter->status);
 574                 zfcp_fsf_link_down_info_eval(req,
 575                         &qtcb->header.fsf_status_qual.link_down_info);
 576                 if (zfcp_fsf_exchange_config_evaluate(req))
 577                         return;
 578                 break;
 579         default:
 580                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 581                 return;
 582         }
 583
 584         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 585                 adapter->hardware_version = bottom->hardware_version;
 586                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 587                        min(FC_SERIAL_NUMBER_SIZE, 17));
 588                 EBCASC(fc_host_serial_number(shost),
 589                        min(FC_SERIAL_NUMBER_SIZE, 17));
 590         }
 591
 592         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 593                 dev_err(&adapter->ccw_device->dev,
 594                         "The FCP adapter only supports newer "
 595                         "control block versions\n");
 596                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 597                 return;
 598         }
 599         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 600                 dev_err(&adapter->ccw_device->dev,
 601                         "The FCP adapter only supports older "
 602                         "control block versions\n");
 603                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 604         }
 605 }
 606
 607 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 608 {
 609         struct zfcp_adapter *adapter = req->adapter;
 610         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 611         struct Scsi_Host *shost = adapter->scsi_host;
 612
 613         if (req->data)
 614                 memcpy(req->data, bottom, sizeof(*bottom));
 615
 616         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 617                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 618         } else
 619                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 620         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 621         fc_host_supported_speeds(shost) =
 622                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
 623         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 624                FC_FC4_LIST_SIZE);
 625         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 626                FC_FC4_LIST_SIZE);
 627 }
 628
 629 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 630 {
 631         struct fsf_qtcb *qtcb = req->qtcb;
 632
 633         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 634                 return;
 635
 636         switch (qtcb->header.fsf_status) {
 637         case FSF_GOOD:
 638                 zfcp_fsf_exchange_port_evaluate(req);
 639                 break;
 640         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 641                 zfcp_fsf_exchange_port_evaluate(req);
 642                 zfcp_fsf_link_down_info_eval(req,
 643                         &qtcb->header.fsf_status_qual.link_down_info);
 644                 break;
 645         }
 646 }
 647
 648 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 649 {
 650         struct zfcp_fsf_req *req;
 651
 652         if (likely(pool))
 653                 req = mempool_alloc(pool, GFP_ATOMIC);
 654         else
 655                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 656
 657         if (unlikely(!req))
 658                 return NULL;
 659
 660         memset(req, 0, sizeof(*req));
 661         req->pool = pool;
 662         return req;
 663 }
 664
 665 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 666 {
 667         struct fsf_qtcb *qtcb;
 668
 669         if (likely(pool))
 670                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 671         else
 672                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 673
 674         if (unlikely(!qtcb))
 675                 return NULL;
 676
 677         memset(qtcb, 0, sizeof(*qtcb));
 678         return qtcb;
 679 }
 680
 681 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 682                                                 u32 fsf_cmd, u8 sbtype,
 683                                                 mempool_t *pool)
 684 {
 685         struct zfcp_adapter *adapter = qdio->adapter;
 686         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 687
 688         if (unlikely(!req))
 689                 return ERR_PTR(-ENOMEM);
 690
 691         if (adapter->req_no == 0)
 692                 adapter->req_no++;
 693
 694         INIT_LIST_HEAD(&req->list);
 695         init_timer(&req->timer);
 696         init_completion(&req->completion);
 697
 698         req->adapter = adapter;
 699         req->fsf_command = fsf_cmd;
 700         req->req_id = adapter->req_no;
 701
 702         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 703                 if (likely(pool))
 704                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 705                 else
 706                         req->qtcb = zfcp_qtcb_alloc(NULL);
 707
 708                 if (unlikely(!req->qtcb)) {
 709                         zfcp_fsf_req_free(req);
 710                         return ERR_PTR(-ENOMEM);
 711                 }
 712
 713                 req->seq_no = adapter->fsf_req_seq_no;
 714                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 715                 req->qtcb->prefix.req_id = req->req_id;
 716                 req->qtcb->prefix.ulp_info = 26;
 717                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 718                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 719                 req->qtcb->header.req_handle = req->req_id;
 720                 req->qtcb->header.fsf_command = req->fsf_command;
 721         }
 722
 723         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 724                            req->qtcb, sizeof(struct fsf_qtcb));
 725
 726         return req;
 727 }
 728
 729 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 730 {
 731         struct zfcp_adapter *adapter = req->adapter;
 732         struct zfcp_qdio *qdio = adapter->qdio;
 733         int with_qtcb = (req->qtcb != NULL);
 734         int req_id = req->req_id;
 735
 736         zfcp_reqlist_add(adapter->req_list, req);
 737
 738         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 739         req->issued = get_tod_clock();
 740         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 741                 del_timer(&req->timer);
 742                 /* lookup request again, list might have changed */
 743                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 744                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 745                 return -EIO;
 746         }
 747
 748         /* Don't increase for unsolicited status */
 749         if (with_qtcb)
 750                 adapter->fsf_req_seq_no++;
 751         adapter->req_no++;
 752
 753         return 0;
 754 }
 755
 756 /**
 757  * zfcp_fsf_status_read - send status read request
 758  * @adapter: pointer to struct zfcp_adapter
 759  * @req_flags: request flags
 760  * Returns: 0 on success, ERROR otherwise
 761  */
 762 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 763 {
 764         struct zfcp_adapter *adapter = qdio->adapter;
 765         struct zfcp_fsf_req *req;
 766         struct fsf_status_read_buffer *sr_buf;
 767         struct page *page;
 768         int retval = -EIO;
 769
 770         spin_lock_irq(&qdio->req_q_lock);
 771         if (zfcp_qdio_sbal_get(qdio))
 772                 goto out;
 773
 774         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 775                                   SBAL_SFLAGS0_TYPE_STATUS,
 776                                   adapter->pool.status_read_req);
 777         if (IS_ERR(req)) {
 778                 retval = PTR_ERR(req);
 779                 goto out;
 780         }
 781
 782         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 783         if (!page) {
 784                 retval = -ENOMEM;
 785                 goto failed_buf;
 786         }
 787         sr_buf = page_address(page);
 788         memset(sr_buf, 0, sizeof(*sr_buf));
 789         req->data = sr_buf;
 790
 791         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 792         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 793
 794         retval = zfcp_fsf_req_send(req);
 795         if (retval)
 796                 goto failed_req_send;
 797
 798         goto out;
 799
 800 failed_req_send:
 801         req->data = NULL;
 802         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 803 failed_buf:
 804         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 805         zfcp_fsf_req_free(req);
 806 out:
 807         spin_unlock_irq(&qdio->req_q_lock);
 808         return retval;
 809 }
 810
 811 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 812 {
 813         struct scsi_device *sdev = req->data;
 814         struct zfcp_scsi_dev *zfcp_sdev;
 815         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 816
 817         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 818                 return;
 819
 820         zfcp_sdev = sdev_to_zfcp(sdev);
 821
 822         switch (req->qtcb->header.fsf_status) {
 823         case FSF_PORT_HANDLE_NOT_VALID:
 824                 if (fsq->word[0] == fsq->word[1]) {
 825                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 826                                                 "fsafch1");
 827                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 828                 }
 829                 break;
 830         case FSF_LUN_HANDLE_NOT_VALID:
 831                 if (fsq->word[0] == fsq->word[1]) {
 832                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 833                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 834                 }
 835                 break;
 836         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 837                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 838                 break;
 839         case FSF_PORT_BOXED:
 840                 zfcp_erp_set_port_status(zfcp_sdev->port,
 841                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 842                 zfcp_erp_port_reopen(zfcp_sdev->port,
 843                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 844                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 845                 break;
 846         case FSF_LUN_BOXED:
 847                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 848                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 849                                     "fsafch4");
 850                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 851                 break;
 852         case FSF_ADAPTER_STATUS_AVAILABLE:
 853                 switch (fsq->word[0]) {
 854                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 855                         zfcp_fc_test_link(zfcp_sdev->port);
 856                         /* fall through */
 857                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 858                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 859                         break;
 860                 }
 861                 break;
 862         case FSF_GOOD:
 863                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 864                 break;
 865         }
 866 }
 867
 868 /**
 869  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 870  * @scmnd: The SCSI command to abort
 871  * Returns: pointer to struct zfcp_fsf_req
 872  */
 873
 874 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 875 {
 876         struct zfcp_fsf_req *req = NULL;
 877         struct scsi_device *sdev = scmnd->device;
 878         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 879         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 880         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 881
 882         spin_lock_irq(&qdio->req_q_lock);
 883         if (zfcp_qdio_sbal_get(qdio))
 884                 goto out;
 885         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 886                                   SBAL_SFLAGS0_TYPE_READ,
 887                                   qdio->adapter->pool.scsi_abort);
 888         if (IS_ERR(req)) {
 889                 req = NULL;
 890                 goto out;
 891         }
 892
 893         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 894                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 895                 goto out_error_free;
 896
 897         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 898
 899         req->data = sdev;
 900         req->handler = zfcp_fsf_abort_fcp_command_handler;
 901         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 902         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 903         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 904
 905         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 906         if (!zfcp_fsf_req_send(req))
 907                 goto out;
 908
 909 out_error_free:
 910         zfcp_fsf_req_free(req);
 911         req = NULL;
 912 out:
 913         spin_unlock_irq(&qdio->req_q_lock);
 914         return req;
 915 }
 916
 917 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 918 {
 919         struct zfcp_adapter *adapter = req->adapter;
 920         struct zfcp_fsf_ct_els *ct = req->data;
 921         struct fsf_qtcb_header *header = &req->qtcb->header;
 922
 923         ct->status = -EINVAL;
 924
 925         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 926                 goto skip_fsfstatus;
 927
 928         switch (header->fsf_status) {
 929         case FSF_GOOD:
 930                 ct->status = 0;
 931                 zfcp_dbf_san_res("fsscth2", req);
 932                 break;
 933         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 934                 zfcp_fsf_class_not_supp(req);
 935                 break;
 936         case FSF_ADAPTER_STATUS_AVAILABLE:
 937                 switch (header->fsf_status_qual.word[0]){
 938                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 939                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 940                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 941                         break;
 942                 }
 943                 break;
 944         case FSF_PORT_BOXED:
 945                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 946                 break;
 947         case FSF_PORT_HANDLE_NOT_VALID:
 948                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 949                 /* fall through */
 950         case FSF_GENERIC_COMMAND_REJECTED:
 951         case FSF_PAYLOAD_SIZE_MISMATCH:
 952         case FSF_REQUEST_SIZE_TOO_LARGE:
 953         case FSF_RESPONSE_SIZE_TOO_LARGE:
 954         case FSF_SBAL_MISMATCH:
 955                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 956                 break;
 957         }
 958
 959 skip_fsfstatus:
 960         if (ct->handler)
 961                 ct->handler(ct->handler_data);
 962 }
 963
 964 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 965                                             struct zfcp_qdio_req *q_req,
 966                                             struct scatterlist *sg_req,
 967                                             struct scatterlist *sg_resp)
 968 {
 969         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 970         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 971         zfcp_qdio_set_sbale_last(qdio, q_req);
 972 }
 973
 974 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 975                                        struct scatterlist *sg_req,
 976                                        struct scatterlist *sg_resp)
 977 {
 978         struct zfcp_adapter *adapter = req->adapter;
 979         struct zfcp_qdio *qdio = adapter->qdio;
 980         struct fsf_qtcb *qtcb = req->qtcb;
 981         u32 feat = adapter->adapter_features;
 982
 983         if (zfcp_adapter_multi_buffer_active(adapter)) {
 984                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 985                         return -EIO;
 986                 qtcb->bottom.support.req_buf_length =
 987                         zfcp_qdio_real_bytes(sg_req);
 988                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 989                         return -EIO;
 990                 qtcb->bottom.support.resp_buf_length =
 991                         zfcp_qdio_real_bytes(sg_resp);
 992
 993                 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
 994                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 995                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
 996                 return 0;
 997         }
 998
 999         /* use single, unchained SBAL if it can hold the request */
1000         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1001                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1002                                                 sg_req, sg_resp);
1003                 return 0;
1004         }
1005
1006         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1007                 return -EOPNOTSUPP;
1008
1009         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1010                 return -EIO;
1011
1012         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1013
1014         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1015         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1016
1017         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1018                 return -EIO;
1019
1020         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1021
1022         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1023
1024         return 0;
1025 }
1026
1027 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1028                                  struct scatterlist *sg_req,
1029                                  struct scatterlist *sg_resp,
1030                                  unsigned int timeout)
1031 {
1032         int ret;
1033
1034         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1035         if (ret)
1036                 return ret;
1037
1038         /* common settings for ct/gs and els requests */
1039         if (timeout > 255)
1040                 timeout = 255; /* max value accepted by hardware */
1041         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1042         req->qtcb->bottom.support.timeout = timeout;
1043         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1044
1045         return 0;
1046 }
1047
1048 /**
1049  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1050  * @ct: pointer to struct zfcp_send_ct with data for request
1051  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1052  */
1053 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1054                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1055                      unsigned int timeout)
1056 {
1057         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1058         struct zfcp_fsf_req *req;
1059         int ret = -EIO;
1060
1061         spin_lock_irq(&qdio->req_q_lock);
1062         if (zfcp_qdio_sbal_get(qdio))
1063                 goto out;
1064
1065         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1066                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1067
1068         if (IS_ERR(req)) {
1069                 ret = PTR_ERR(req);
1070                 goto out;
1071         }
1072
1073         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1074         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1075         if (ret)
1076                 goto failed_send;
1077
1078         req->handler = zfcp_fsf_send_ct_handler;
1079         req->qtcb->header.port_handle = wka_port->handle;
1080         ct->d_id = wka_port->d_id;
1081         req->data = ct;
1082
1083         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1084
1085         ret = zfcp_fsf_req_send(req);
1086         if (ret)
1087                 goto failed_send;
1088
1089         goto out;
1090
1091 failed_send:
1092         zfcp_fsf_req_free(req);
1093 out:
1094         spin_unlock_irq(&qdio->req_q_lock);
1095         return ret;
1096 }
1097
1098 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1099 {
1100         struct zfcp_fsf_ct_els *send_els = req->data;
1101         struct fsf_qtcb_header *header = &req->qtcb->header;
1102
1103         send_els->status = -EINVAL;
1104
1105         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1106                 goto skip_fsfstatus;
1107
1108         switch (header->fsf_status) {
1109         case FSF_GOOD:
1110                 send_els->status = 0;
1111                 zfcp_dbf_san_res("fsselh1", req);
1112                 break;
1113         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1114                 zfcp_fsf_class_not_supp(req);
1115                 break;
1116         case FSF_ADAPTER_STATUS_AVAILABLE:
1117                 switch (header->fsf_status_qual.word[0]){
1118                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1119                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1120                 case FSF_SQ_RETRY_IF_POSSIBLE:
1121                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1122                         break;
1123                 }
1124                 break;
1125         case FSF_ELS_COMMAND_REJECTED:
1126         case FSF_PAYLOAD_SIZE_MISMATCH:
1127         case FSF_REQUEST_SIZE_TOO_LARGE:
1128         case FSF_RESPONSE_SIZE_TOO_LARGE:
1129                 break;
1130         case FSF_SBAL_MISMATCH:
1131                 /* should never occur, avoided in zfcp_fsf_send_els */
1132                 /* fall through */
1133         default:
1134                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1135                 break;
1136         }
1137 skip_fsfstatus:
1138         if (send_els->handler)
1139                 send_els->handler(send_els->handler_data);
1140 }
1141
1142 /**
1143  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1144  * @els: pointer to struct zfcp_send_els with data for the command
1145  */
1146 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1147                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1148 {
1149         struct zfcp_fsf_req *req;
1150         struct zfcp_qdio *qdio = adapter->qdio;
1151         int ret = -EIO;
1152
1153         spin_lock_irq(&qdio->req_q_lock);
1154         if (zfcp_qdio_sbal_get(qdio))
1155                 goto out;
1156
1157         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1158                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1159
1160         if (IS_ERR(req)) {
1161                 ret = PTR_ERR(req);
1162                 goto out;
1163         }
1164
1165         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1166
1167         if (!zfcp_adapter_multi_buffer_active(adapter))
1168                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1169
1170         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1171
1172         if (ret)
1173                 goto failed_send;
1174
1175         hton24(req->qtcb->bottom.support.d_id, d_id);
1176         req->handler = zfcp_fsf_send_els_handler;
1177         els->d_id = d_id;
1178         req->data = els;
1179
1180         zfcp_dbf_san_req("fssels1", req, d_id);
1181
1182         ret = zfcp_fsf_req_send(req);
1183         if (ret)
1184                 goto failed_send;
1185
1186         goto out;
1187
1188 failed_send:
1189         zfcp_fsf_req_free(req);
1190 out:
1191         spin_unlock_irq(&qdio->req_q_lock);
1192         return ret;
1193 }
1194
1195 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1196 {
1197         struct zfcp_fsf_req *req;
1198         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1199         int retval = -EIO;
1200
1201         spin_lock_irq(&qdio->req_q_lock);
1202         if (zfcp_qdio_sbal_get(qdio))
1203                 goto out;
1204
1205         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1206                                   SBAL_SFLAGS0_TYPE_READ,
1207                                   qdio->adapter->pool.erp_req);
1208
1209         if (IS_ERR(req)) {
1210                 retval = PTR_ERR(req);
1211                 goto out;
1212         }
1213
1214         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1215         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1216
1217         req->qtcb->bottom.config.feature_selection =
1218                         FSF_FEATURE_NOTIFICATION_LOST |
1219                         FSF_FEATURE_UPDATE_ALERT;
1220         req->erp_action = erp_action;
1221         req->handler = zfcp_fsf_exchange_config_data_handler;
1222         erp_action->fsf_req_id = req->req_id;
1223
1224         zfcp_fsf_start_erp_timer(req);
1225         retval = zfcp_fsf_req_send(req);
1226         if (retval) {
1227                 zfcp_fsf_req_free(req);
1228                 erp_action->fsf_req_id = 0;
1229         }
1230 out:
1231         spin_unlock_irq(&qdio->req_q_lock);
1232         return retval;
1233 }
1234
1235 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1236                                        struct fsf_qtcb_bottom_config *data)
1237 {
1238         struct zfcp_fsf_req *req = NULL;
1239         int retval = -EIO;
1240
1241         spin_lock_irq(&qdio->req_q_lock);
1242         if (zfcp_qdio_sbal_get(qdio))
1243                 goto out_unlock;
1244
1245         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1246                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1247
1248         if (IS_ERR(req)) {
1249                 retval = PTR_ERR(req);
1250                 goto out_unlock;
1251         }
1252
1253         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1254         req->handler = zfcp_fsf_exchange_config_data_handler;
1255
1256         req->qtcb->bottom.config.feature_selection =
1257                         FSF_FEATURE_NOTIFICATION_LOST |
1258                         FSF_FEATURE_UPDATE_ALERT;
1259
1260         if (data)
1261                 req->data = data;
1262
1263         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1264         retval = zfcp_fsf_req_send(req);
1265         spin_unlock_irq(&qdio->req_q_lock);
1266         if (!retval)
1267                 wait_for_completion(&req->completion);
1268
1269         zfcp_fsf_req_free(req);
1270         return retval;
1271
1272 out_unlock:
1273         spin_unlock_irq(&qdio->req_q_lock);
1274         return retval;
1275 }
1276
1277 /**
1278  * zfcp_fsf_exchange_port_data - request information about local port
1279  * @erp_action: ERP action for the adapter for which port data is requested
1280  * Returns: 0 on success, error otherwise
1281  */
1282 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1283 {
1284         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1285         struct zfcp_fsf_req *req;
1286         int retval = -EIO;
1287
1288         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1289                 return -EOPNOTSUPP;
1290
1291         spin_lock_irq(&qdio->req_q_lock);
1292         if (zfcp_qdio_sbal_get(qdio))
1293                 goto out;
1294
1295         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1296                                   SBAL_SFLAGS0_TYPE_READ,
1297                                   qdio->adapter->pool.erp_req);
1298
1299         if (IS_ERR(req)) {
1300                 retval = PTR_ERR(req);
1301                 goto out;
1302         }
1303
1304         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1305         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1306
1307         req->handler = zfcp_fsf_exchange_port_data_handler;
1308         req->erp_action = erp_action;
1309         erp_action->fsf_req_id = req->req_id;
1310
1311         zfcp_fsf_start_erp_timer(req);
1312         retval = zfcp_fsf_req_send(req);
1313         if (retval) {
1314                 zfcp_fsf_req_free(req);
1315                 erp_action->fsf_req_id = 0;
1316         }
1317 out:
1318         spin_unlock_irq(&qdio->req_q_lock);
1319         return retval;
1320 }
1321
1322 /**
1323  * zfcp_fsf_exchange_port_data_sync - request information about local port
1324  * @qdio: pointer to struct zfcp_qdio
1325  * @data: pointer to struct fsf_qtcb_bottom_port
1326  * Returns: 0 on success, error otherwise
1327  */
1328 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1329                                      struct fsf_qtcb_bottom_port *data)
1330 {
1331         struct zfcp_fsf_req *req = NULL;
1332         int retval = -EIO;
1333
1334         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1335                 return -EOPNOTSUPP;
1336
1337         spin_lock_irq(&qdio->req_q_lock);
1338         if (zfcp_qdio_sbal_get(qdio))
1339                 goto out_unlock;
1340
1341         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1342                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1343
1344         if (IS_ERR(req)) {
1345                 retval = PTR_ERR(req);
1346                 goto out_unlock;
1347         }
1348
1349         if (data)
1350                 req->data = data;
1351
1352         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1353
1354         req->handler = zfcp_fsf_exchange_port_data_handler;
1355         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1356         retval = zfcp_fsf_req_send(req);
1357         spin_unlock_irq(&qdio->req_q_lock);
1358
1359         if (!retval)
1360                 wait_for_completion(&req->completion);
1361
1362         zfcp_fsf_req_free(req);
1363
1364         return retval;
1365
1366 out_unlock:
1367         spin_unlock_irq(&qdio->req_q_lock);
1368         return retval;
1369 }
1370
1371 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1372 {
1373         struct zfcp_port *port = req->data;
1374         struct fsf_qtcb_header *header = &req->qtcb->header;
1375         struct fc_els_flogi *plogi;
1376
1377         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1378                 goto out;
1379
1380         switch (header->fsf_status) {
1381         case FSF_PORT_ALREADY_OPEN:
1382                 break;
1383         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1384                 dev_warn(&req->adapter->ccw_device->dev,
1385                          "Not enough FCP adapter resources to open "
1386                          "remote port 0x%016Lx\n",
1387                          (unsigned long long)port->wwpn);
1388                 zfcp_erp_set_port_status(port,
1389                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1390                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1391                 break;
1392         case FSF_ADAPTER_STATUS_AVAILABLE:
1393                 switch (header->fsf_status_qual.word[0]) {
1394                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1395                         /* no zfcp_fc_test_link() with failed open port */
1396                         /* fall through */
1397                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1398                 case FSF_SQ_NO_RETRY_POSSIBLE:
1399                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1400                         break;
1401                 }
1402                 break;
1403         case FSF_GOOD:
1404                 port->handle = header->port_handle;
1405                 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1406                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1407                 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1408                                   &port->status);
1409                 /* check whether D_ID has changed during open */
1410                 /*
1411                  * FIXME: This check is not airtight, as the FCP channel does
1412                  * not monitor closures of target port connections caused on
1413                  * the remote side. Thus, they might miss out on invalidating
1414                  * locally cached WWPNs (and other N_Port parameters) of gone
1415                  * target ports. So, our heroic attempt to make things safe
1416                  * could be undermined by 'open port' response data tagged with
1417                  * obsolete WWPNs. Another reason to monitor potential
1418                  * connection closures ourself at least (by interpreting
1419                  * incoming ELS' and unsolicited status). It just crosses my
1420                  * mind that one should be able to cross-check by means of
1421                  * another GID_PN straight after a port has been opened.
1422                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1423                  */
1424                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1425                 if (req->qtcb->bottom.support.els1_length >=
1426                     FSF_PLOGI_MIN_LEN)
1427                                 zfcp_fc_plogi_evaluate(port, plogi);
1428                 break;
1429         case FSF_UNKNOWN_OP_SUBTYPE:
1430                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1431                 break;
1432         }
1433
1434 out:
1435         put_device(&port->dev);
1436 }
1437
1438 /**
1439  * zfcp_fsf_open_port - create and send open port request
1440  * @erp_action: pointer to struct zfcp_erp_action
1441  * Returns: 0 on success, error otherwise
1442  */
1443 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1444 {
1445         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1446         struct zfcp_port *port = erp_action->port;
1447         struct zfcp_fsf_req *req;
1448         int retval = -EIO;
1449
1450         spin_lock_irq(&qdio->req_q_lock);
1451         if (zfcp_qdio_sbal_get(qdio))
1452                 goto out;
1453
1454         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1455                                   SBAL_SFLAGS0_TYPE_READ,
1456                                   qdio->adapter->pool.erp_req);
1457
1458         if (IS_ERR(req)) {
1459                 retval = PTR_ERR(req);
1460                 goto out;
1461         }
1462
1463         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1464         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1465
1466         req->handler = zfcp_fsf_open_port_handler;
1467         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1468         req->data = port;
1469         req->erp_action = erp_action;
1470         erp_action->fsf_req_id = req->req_id;
1471         get_device(&port->dev);
1472
1473         zfcp_fsf_start_erp_timer(req);
1474         retval = zfcp_fsf_req_send(req);
1475         if (retval) {
1476                 zfcp_fsf_req_free(req);
1477                 erp_action->fsf_req_id = 0;
1478                 put_device(&port->dev);
1479         }
1480 out:
1481         spin_unlock_irq(&qdio->req_q_lock);
1482         return retval;
1483 }
1484
1485 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1486 {
1487         struct zfcp_port *port = req->data;
1488
1489         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1490                 return;
1491
1492         switch (req->qtcb->header.fsf_status) {
1493         case FSF_PORT_HANDLE_NOT_VALID:
1494                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1495                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1496                 break;
1497         case FSF_ADAPTER_STATUS_AVAILABLE:
1498                 break;
1499         case FSF_GOOD:
1500                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1501                 break;
1502         }
1503 }
1504
1505 /**
1506  * zfcp_fsf_close_port - create and send close port request
1507  * @erp_action: pointer to struct zfcp_erp_action
1508  * Returns: 0 on success, error otherwise
1509  */
1510 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1511 {
1512         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1513         struct zfcp_fsf_req *req;
1514         int retval = -EIO;
1515
1516         spin_lock_irq(&qdio->req_q_lock);
1517         if (zfcp_qdio_sbal_get(qdio))
1518                 goto out;
1519
1520         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1521                                   SBAL_SFLAGS0_TYPE_READ,
1522                                   qdio->adapter->pool.erp_req);
1523
1524         if (IS_ERR(req)) {
1525                 retval = PTR_ERR(req);
1526                 goto out;
1527         }
1528
1529         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1530         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1531
1532         req->handler = zfcp_fsf_close_port_handler;
1533         req->data = erp_action->port;
1534         req->erp_action = erp_action;
1535         req->qtcb->header.port_handle = erp_action->port->handle;
1536         erp_action->fsf_req_id = req->req_id;
1537
1538         zfcp_fsf_start_erp_timer(req);
1539         retval = zfcp_fsf_req_send(req);
1540         if (retval) {
1541                 zfcp_fsf_req_free(req);
1542                 erp_action->fsf_req_id = 0;
1543         }
1544 out:
1545         spin_unlock_irq(&qdio->req_q_lock);
1546         return retval;
1547 }
1548
1549 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1550 {
1551         struct zfcp_fc_wka_port *wka_port = req->data;
1552         struct fsf_qtcb_header *header = &req->qtcb->header;
1553
1554         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1555                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1556                 goto out;
1557         }
1558
1559         switch (header->fsf_status) {
1560         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1561                 dev_warn(&req->adapter->ccw_device->dev,
1562                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1563                 /* fall through */
1564         case FSF_ADAPTER_STATUS_AVAILABLE:
1565                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1566                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1567                 break;
1568         case FSF_GOOD:
1569                 wka_port->handle = header->port_handle;
1570                 /* fall through */
1571         case FSF_PORT_ALREADY_OPEN:
1572                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1573         }
1574 out:
1575         wake_up(&wka_port->completion_wq);
1576 }
1577
1578 /**
1579  * zfcp_fsf_open_wka_port - create and send open wka-port request
1580  * @wka_port: pointer to struct zfcp_fc_wka_port
1581  * Returns: 0 on success, error otherwise
1582  */
1583 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1584 {
1585         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1586         struct zfcp_fsf_req *req;
1587         int retval = -EIO;
1588
1589         spin_lock_irq(&qdio->req_q_lock);
1590         if (zfcp_qdio_sbal_get(qdio))
1591                 goto out;
1592
1593         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1594                                   SBAL_SFLAGS0_TYPE_READ,
1595                                   qdio->adapter->pool.erp_req);
1596
1597         if (IS_ERR(req)) {
1598                 retval = PTR_ERR(req);
1599                 goto out;
1600         }
1601
1602         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1603         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1604
1605         req->handler = zfcp_fsf_open_wka_port_handler;
1606         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1607         req->data = wka_port;
1608
1609         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1610         retval = zfcp_fsf_req_send(req);
1611         if (retval)
1612                 zfcp_fsf_req_free(req);
1613 out:
1614         spin_unlock_irq(&qdio->req_q_lock);
1615         if (!retval)
1616                 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id);
1617         return retval;
1618 }
1619
1620 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1621 {
1622         struct zfcp_fc_wka_port *wka_port = req->data;
1623
1624         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1625                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1626                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1627         }
1628
1629         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1630         wake_up(&wka_port->completion_wq);
1631 }
1632
1633 /**
1634  * zfcp_fsf_close_wka_port - create and send close wka port request
1635  * @wka_port: WKA port to open
1636  * Returns: 0 on success, error otherwise
1637  */
1638 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1639 {
1640         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1641         struct zfcp_fsf_req *req;
1642         int retval = -EIO;
1643
1644         spin_lock_irq(&qdio->req_q_lock);
1645         if (zfcp_qdio_sbal_get(qdio))
1646                 goto out;
1647
1648         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1649                                   SBAL_SFLAGS0_TYPE_READ,
1650                                   qdio->adapter->pool.erp_req);
1651
1652         if (IS_ERR(req)) {
1653                 retval = PTR_ERR(req);
1654                 goto out;
1655         }
1656
1657         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1658         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1659
1660         req->handler = zfcp_fsf_close_wka_port_handler;
1661         req->data = wka_port;
1662         req->qtcb->header.port_handle = wka_port->handle;
1663
1664         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1665         retval = zfcp_fsf_req_send(req);
1666         if (retval)
1667                 zfcp_fsf_req_free(req);
1668 out:
1669         spin_unlock_irq(&qdio->req_q_lock);
1670         if (!retval)
1671                 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id);
1672         return retval;
1673 }
1674
1675 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1676 {
1677         struct zfcp_port *port = req->data;
1678         struct fsf_qtcb_header *header = &req->qtcb->header;
1679         struct scsi_device *sdev;
1680
1681         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1682                 return;
1683
1684         switch (header->fsf_status) {
1685         case FSF_PORT_HANDLE_NOT_VALID:
1686                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1687                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1688                 break;
1689         case FSF_PORT_BOXED:
1690                 /* can't use generic zfcp_erp_modify_port_status because
1691                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1692                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1693                 shost_for_each_device(sdev, port->adapter->scsi_host)
1694                         if (sdev_to_zfcp(sdev)->port == port)
1695                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1696                                                   &sdev_to_zfcp(sdev)->status);
1697                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1698                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1699                                      "fscpph2");
1700                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1701                 break;
1702         case FSF_ADAPTER_STATUS_AVAILABLE:
1703                 switch (header->fsf_status_qual.word[0]) {
1704                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1705                         /* fall through */
1706                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1707                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1708                         break;
1709                 }
1710                 break;
1711         case FSF_GOOD:
1712                 /* can't use generic zfcp_erp_modify_port_status because
1713                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1714                  */
1715                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1716                 shost_for_each_device(sdev, port->adapter->scsi_host)
1717                         if (sdev_to_zfcp(sdev)->port == port)
1718                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1719                                                   &sdev_to_zfcp(sdev)->status);
1720                 break;
1721         }
1722 }
1723
1724 /**
1725  * zfcp_fsf_close_physical_port - close physical port
1726  * @erp_action: pointer to struct zfcp_erp_action
1727  * Returns: 0 on success
1728  */
1729 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1730 {
1731         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1732         struct zfcp_fsf_req *req;
1733         int retval = -EIO;
1734
1735         spin_lock_irq(&qdio->req_q_lock);
1736         if (zfcp_qdio_sbal_get(qdio))
1737                 goto out;
1738
1739         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1740                                   SBAL_SFLAGS0_TYPE_READ,
1741                                   qdio->adapter->pool.erp_req);
1742
1743         if (IS_ERR(req)) {
1744                 retval = PTR_ERR(req);
1745                 goto out;
1746         }
1747
1748         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1749         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1750
1751         req->data = erp_action->port;
1752         req->qtcb->header.port_handle = erp_action->port->handle;
1753         req->erp_action = erp_action;
1754         req->handler = zfcp_fsf_close_physical_port_handler;
1755         erp_action->fsf_req_id = req->req_id;
1756
1757         zfcp_fsf_start_erp_timer(req);
1758         retval = zfcp_fsf_req_send(req);
1759         if (retval) {
1760                 zfcp_fsf_req_free(req);
1761                 erp_action->fsf_req_id = 0;
1762         }
1763 out:
1764         spin_unlock_irq(&qdio->req_q_lock);
1765         return retval;
1766 }
1767
1768 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1769 {
1770         struct zfcp_adapter *adapter = req->adapter;
1771         struct scsi_device *sdev = req->data;
1772         struct zfcp_scsi_dev *zfcp_sdev;
1773         struct fsf_qtcb_header *header = &req->qtcb->header;
1774         union fsf_status_qual *qual = &header->fsf_status_qual;
1775
1776         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1777                 return;
1778
1779         zfcp_sdev = sdev_to_zfcp(sdev);
1780
1781         atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1782                           ZFCP_STATUS_COMMON_ACCESS_BOXED,
1783                           &zfcp_sdev->status);
1784
1785         switch (header->fsf_status) {
1786
1787         case FSF_PORT_HANDLE_NOT_VALID:
1788                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1789                 /* fall through */
1790         case FSF_LUN_ALREADY_OPEN:
1791                 break;
1792         case FSF_PORT_BOXED:
1793                 zfcp_erp_set_port_status(zfcp_sdev->port,
1794                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1795                 zfcp_erp_port_reopen(zfcp_sdev->port,
1796                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1797                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1798                 break;
1799         case FSF_LUN_SHARING_VIOLATION:
1800                 if (qual->word[0])
1801                         dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1802                                  "LUN 0x%Lx on port 0x%Lx is already in "
1803                                  "use by CSS%d, MIF Image ID %x\n",
1804                                  zfcp_scsi_dev_lun(sdev),
1805                                  (unsigned long long)zfcp_sdev->port->wwpn,
1806                                  qual->fsf_queue_designator.cssid,
1807                                  qual->fsf_queue_designator.hla);
1808                 zfcp_erp_set_lun_status(sdev,
1809                                         ZFCP_STATUS_COMMON_ERP_FAILED |
1810                                         ZFCP_STATUS_COMMON_ACCESS_DENIED);
1811                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1812                 break;
1813         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1814                 dev_warn(&adapter->ccw_device->dev,
1815                          "No handle is available for LUN "
1816                          "0x%016Lx on port 0x%016Lx\n",
1817                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1818                          (unsigned long long)zfcp_sdev->port->wwpn);
1819                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1820                 /* fall through */
1821         case FSF_INVALID_COMMAND_OPTION:
1822                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1823                 break;
1824         case FSF_ADAPTER_STATUS_AVAILABLE:
1825                 switch (header->fsf_status_qual.word[0]) {
1826                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1827                         zfcp_fc_test_link(zfcp_sdev->port);
1828                         /* fall through */
1829                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1830                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1831                         break;
1832                 }
1833                 break;
1834
1835         case FSF_GOOD:
1836                 zfcp_sdev->lun_handle = header->lun_handle;
1837                 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1838                 break;
1839         }
1840 }
1841
1842 /**
1843  * zfcp_fsf_open_lun - open LUN
1844  * @erp_action: pointer to struct zfcp_erp_action
1845  * Returns: 0 on success, error otherwise
1846  */
1847 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1848 {
1849         struct zfcp_adapter *adapter = erp_action->adapter;
1850         struct zfcp_qdio *qdio = adapter->qdio;
1851         struct zfcp_fsf_req *req;
1852         int retval = -EIO;
1853
1854         spin_lock_irq(&qdio->req_q_lock);
1855         if (zfcp_qdio_sbal_get(qdio))
1856                 goto out;
1857
1858         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1859                                   SBAL_SFLAGS0_TYPE_READ,
1860                                   adapter->pool.erp_req);
1861
1862         if (IS_ERR(req)) {
1863                 retval = PTR_ERR(req);
1864                 goto out;
1865         }
1866
1867         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1868         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1869
1870         req->qtcb->header.port_handle = erp_action->port->handle;
1871         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1872         req->handler = zfcp_fsf_open_lun_handler;
1873         req->data = erp_action->sdev;
1874         req->erp_action = erp_action;
1875         erp_action->fsf_req_id = req->req_id;
1876
1877         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1878                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1879
1880         zfcp_fsf_start_erp_timer(req);
1881         retval = zfcp_fsf_req_send(req);
1882         if (retval) {
1883                 zfcp_fsf_req_free(req);
1884                 erp_action->fsf_req_id = 0;
1885         }
1886 out:
1887         spin_unlock_irq(&qdio->req_q_lock);
1888         return retval;
1889 }
1890
1891 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1892 {
1893         struct scsi_device *sdev = req->data;
1894         struct zfcp_scsi_dev *zfcp_sdev;
1895
1896         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1897                 return;
1898
1899         zfcp_sdev = sdev_to_zfcp(sdev);
1900
1901         switch (req->qtcb->header.fsf_status) {
1902         case FSF_PORT_HANDLE_NOT_VALID:
1903                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1904                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1905                 break;
1906         case FSF_LUN_HANDLE_NOT_VALID:
1907                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1908                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1909                 break;
1910         case FSF_PORT_BOXED:
1911                 zfcp_erp_set_port_status(zfcp_sdev->port,
1912                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1913                 zfcp_erp_port_reopen(zfcp_sdev->port,
1914                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1915                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1916                 break;
1917         case FSF_ADAPTER_STATUS_AVAILABLE:
1918                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1919                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1920                         zfcp_fc_test_link(zfcp_sdev->port);
1921                         /* fall through */
1922                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1923                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1924                         break;
1925                 }
1926                 break;
1927         case FSF_GOOD:
1928                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1929                 break;
1930         }
1931 }
1932
1933 /**
1934  * zfcp_fsf_close_LUN - close LUN
1935  * @erp_action: pointer to erp_action triggering the "close LUN"
1936  * Returns: 0 on success, error otherwise
1937  */
1938 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1939 {
1940         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1941         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1942         struct zfcp_fsf_req *req;
1943         int retval = -EIO;
1944
1945         spin_lock_irq(&qdio->req_q_lock);
1946         if (zfcp_qdio_sbal_get(qdio))
1947                 goto out;
1948
1949         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1950                                   SBAL_SFLAGS0_TYPE_READ,
1951                                   qdio->adapter->pool.erp_req);
1952
1953         if (IS_ERR(req)) {
1954                 retval = PTR_ERR(req);
1955                 goto out;
1956         }
1957
1958         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1959         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1960
1961         req->qtcb->header.port_handle = erp_action->port->handle;
1962         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1963         req->handler = zfcp_fsf_close_lun_handler;
1964         req->data = erp_action->sdev;
1965         req->erp_action = erp_action;
1966         erp_action->fsf_req_id = req->req_id;
1967
1968         zfcp_fsf_start_erp_timer(req);
1969         retval = zfcp_fsf_req_send(req);
1970         if (retval) {
1971                 zfcp_fsf_req_free(req);
1972                 erp_action->fsf_req_id = 0;
1973         }
1974 out:
1975         spin_unlock_irq(&qdio->req_q_lock);
1976         return retval;
1977 }
1978
1979 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1980 {
1981         lat_rec->sum += lat;
1982         lat_rec->min = min(lat_rec->min, lat);
1983         lat_rec->max = max(lat_rec->max, lat);
1984 }
1985
1986 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1987 {
1988         struct fsf_qual_latency_info *lat_in;
1989         struct latency_cont *lat = NULL;
1990         struct zfcp_scsi_dev *zfcp_sdev;
1991         struct zfcp_blk_drv_data blktrc;
1992         int ticks = req->adapter->timer_ticks;
1993
1994         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1995
1996         blktrc.flags = 0;
1997         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1998         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1999                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2000         blktrc.inb_usage = 0;
2001         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2002
2003         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2004             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2005                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2006                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2007                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2008                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2009
2010                 switch (req->qtcb->bottom.io.data_direction) {
2011                 case FSF_DATADIR_DIF_READ_STRIP:
2012                 case FSF_DATADIR_DIF_READ_CONVERT:
2013                 case FSF_DATADIR_READ:
2014                         lat = &zfcp_sdev->latencies.read;
2015                         break;
2016                 case FSF_DATADIR_DIF_WRITE_INSERT:
2017                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2018                 case FSF_DATADIR_WRITE:
2019                         lat = &zfcp_sdev->latencies.write;
2020                         break;
2021                 case FSF_DATADIR_CMND:
2022                         lat = &zfcp_sdev->latencies.cmd;
2023                         break;
2024                 }
2025
2026                 if (lat) {
2027                         spin_lock(&zfcp_sdev->latencies.lock);
2028                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2029                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2030                         lat->counter++;
2031                         spin_unlock(&zfcp_sdev->latencies.lock);
2032                 }
2033         }
2034
2035         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2036                             sizeof(blktrc));
2037 }
2038
2039 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2040 {
2041         struct scsi_cmnd *scmnd = req->data;
2042         struct scsi_device *sdev = scmnd->device;
2043         struct zfcp_scsi_dev *zfcp_sdev;
2044         struct fsf_qtcb_header *header = &req->qtcb->header;
2045
2046         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2047                 return;
2048
2049         zfcp_sdev = sdev_to_zfcp(sdev);
2050
2051         switch (header->fsf_status) {
2052         case FSF_HANDLE_MISMATCH:
2053         case FSF_PORT_HANDLE_NOT_VALID:
2054                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2055                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2056                 break;
2057         case FSF_FCPLUN_NOT_VALID:
2058         case FSF_LUN_HANDLE_NOT_VALID:
2059                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2060                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2061                 break;
2062         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2063                 zfcp_fsf_class_not_supp(req);
2064                 break;
2065         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2066                 dev_err(&req->adapter->ccw_device->dev,
2067                         "Incorrect direction %d, LUN 0x%016Lx on port "
2068                         "0x%016Lx closed\n",
2069                         req->qtcb->bottom.io.data_direction,
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                                           "fssfch3");
2074                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2075                 break;
2076         case FSF_CMND_LENGTH_NOT_VALID:
2077                 dev_err(&req->adapter->ccw_device->dev,
2078                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2079                         "port 0x%016Lx closed\n",
2080                         req->qtcb->bottom.io.fcp_cmnd_length,
2081                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2082                         (unsigned long long)zfcp_sdev->port->wwpn);
2083                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2084                                           "fssfch4");
2085                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2086                 break;
2087         case FSF_PORT_BOXED:
2088                 zfcp_erp_set_port_status(zfcp_sdev->port,
2089                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2090                 zfcp_erp_port_reopen(zfcp_sdev->port,
2091                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2092                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2093                 break;
2094         case FSF_LUN_BOXED:
2095                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2096                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2097                                     "fssfch6");
2098                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2099                 break;
2100         case FSF_ADAPTER_STATUS_AVAILABLE:
2101                 if (header->fsf_status_qual.word[0] ==
2102                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2103                         zfcp_fc_test_link(zfcp_sdev->port);
2104                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2105                 break;
2106         }
2107 }
2108
2109 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2110 {
2111         struct scsi_cmnd *scpnt;
2112         struct fcp_resp_with_ext *fcp_rsp;
2113         unsigned long flags;
2114
2115         read_lock_irqsave(&req->adapter->abort_lock, flags);
2116
2117         scpnt = req->data;
2118         if (unlikely(!scpnt)) {
2119                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2120                 return;
2121         }
2122
2123         zfcp_fsf_fcp_handler_common(req);
2124
2125         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2126                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2127                 goto skip_fsfstatus;
2128         }
2129
2130         switch (req->qtcb->header.fsf_status) {
2131         case FSF_INCONSISTENT_PROT_DATA:
2132         case FSF_INVALID_PROT_PARM:
2133                 set_host_byte(scpnt, DID_ERROR);
2134                 goto skip_fsfstatus;
2135         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2136                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2137                 goto skip_fsfstatus;
2138         case FSF_APP_TAG_CHECK_FAILURE:
2139                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2140                 goto skip_fsfstatus;
2141         case FSF_REF_TAG_CHECK_FAILURE:
2142                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2143                 goto skip_fsfstatus;
2144         }
2145         BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2146         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2147         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2148
2149 skip_fsfstatus:
2150         zfcp_fsf_req_trace(req, scpnt);
2151         zfcp_dbf_scsi_result(scpnt, req);
2152
2153         scpnt->host_scribble = NULL;
2154         (scpnt->scsi_done) (scpnt);
2155         /*
2156          * We must hold this lock until scsi_done has been called.
2157          * Otherwise we may call scsi_done after abort regarding this
2158          * command has completed.
2159          * Note: scsi_done must not block!
2160          */
2161         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2162 }
2163
2164 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2165 {
2166         switch (scsi_get_prot_op(scsi_cmnd)) {
2167         case SCSI_PROT_NORMAL:
2168                 switch (scsi_cmnd->sc_data_direction) {
2169                 case DMA_NONE:
2170                         *data_dir = FSF_DATADIR_CMND;
2171                         break;
2172                 case DMA_FROM_DEVICE:
2173                         *data_dir = FSF_DATADIR_READ;
2174                         break;
2175                 case DMA_TO_DEVICE:
2176                         *data_dir = FSF_DATADIR_WRITE;
2177                         break;
2178                 case DMA_BIDIRECTIONAL:
2179                         return -EINVAL;
2180                 }
2181                 break;
2182
2183         case SCSI_PROT_READ_STRIP:
2184                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2185                 break;
2186         case SCSI_PROT_WRITE_INSERT:
2187                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2188                 break;
2189         case SCSI_PROT_READ_PASS:
2190                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2191                 break;
2192         case SCSI_PROT_WRITE_PASS:
2193                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2194                 break;
2195         default:
2196                 return -EINVAL;
2197         }
2198
2199         return 0;
2200 }
2201
2202 /**
2203  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2204  * @scsi_cmnd: scsi command to be sent
2205  */
2206 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2207 {
2208         struct zfcp_fsf_req *req;
2209         struct fcp_cmnd *fcp_cmnd;
2210         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2211         int retval = -EIO;
2212         struct scsi_device *sdev = scsi_cmnd->device;
2213         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2214         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2215         struct zfcp_qdio *qdio = adapter->qdio;
2216         struct fsf_qtcb_bottom_io *io;
2217         unsigned long flags;
2218
2219         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2220                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2221                 return -EBUSY;
2222
2223         spin_lock_irqsave(&qdio->req_q_lock, flags);
2224         if (atomic_read(&qdio->req_q_free) <= 0) {
2225                 atomic_inc(&qdio->req_q_full);
2226                 goto out;
2227         }
2228
2229         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2230                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2231
2232         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2233                                   sbtype, adapter->pool.scsi_req);
2234
2235         if (IS_ERR(req)) {
2236                 retval = PTR_ERR(req);
2237                 goto out;
2238         }
2239
2240         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2241
2242         io = &req->qtcb->bottom.io;
2243         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2244         req->data = scsi_cmnd;
2245         req->handler = zfcp_fsf_fcp_cmnd_handler;
2246         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2247         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2248         io->service_class = FSF_CLASS_3;
2249         io->fcp_cmnd_length = FCP_CMND_LEN;
2250
2251         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2252                 io->data_block_length = scsi_cmnd->device->sector_size;
2253                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2254         }
2255
2256         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2257                 goto failed_scsi_cmnd;
2258
2259         BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2260         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2261         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2262
2263         if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2264             scsi_prot_sg_count(scsi_cmnd)) {
2265                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2266                                        scsi_prot_sg_count(scsi_cmnd));
2267                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2268                                                  scsi_prot_sglist(scsi_cmnd));
2269                 if (retval)
2270                         goto failed_scsi_cmnd;
2271                 io->prot_data_length = zfcp_qdio_real_bytes(
2272                                                 scsi_prot_sglist(scsi_cmnd));
2273         }
2274
2275         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2276                                          scsi_sglist(scsi_cmnd));
2277         if (unlikely(retval))
2278                 goto failed_scsi_cmnd;
2279
2280         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2281         if (zfcp_adapter_multi_buffer_active(adapter))
2282                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2283
2284         retval = zfcp_fsf_req_send(req);
2285         if (unlikely(retval))
2286                 goto failed_scsi_cmnd;
2287
2288         goto out;
2289
2290 failed_scsi_cmnd:
2291         zfcp_fsf_req_free(req);
2292         scsi_cmnd->host_scribble = NULL;
2293 out:
2294         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2295         return retval;
2296 }
2297
2298 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2299 {
2300         struct fcp_resp_with_ext *fcp_rsp;
2301         struct fcp_resp_rsp_info *rsp_info;
2302
2303         zfcp_fsf_fcp_handler_common(req);
2304
2305         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2306         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2307
2308         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2309              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2310                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2311 }
2312
2313 /**
2314  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2315  * @scmnd: SCSI command to send the task management command for
2316  * @tm_flags: unsigned byte for task management flags
2317  * Returns: on success pointer to struct fsf_req, NULL otherwise
2318  */
2319 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2320                                             u8 tm_flags)
2321 {
2322         struct zfcp_fsf_req *req = NULL;
2323         struct fcp_cmnd *fcp_cmnd;
2324         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2325         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2326
2327         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2328                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2329                 return NULL;
2330
2331         spin_lock_irq(&qdio->req_q_lock);
2332         if (zfcp_qdio_sbal_get(qdio))
2333                 goto out;
2334
2335         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2336                                   SBAL_SFLAGS0_TYPE_WRITE,
2337                                   qdio->adapter->pool.scsi_req);
2338
2339         if (IS_ERR(req)) {
2340                 req = NULL;
2341                 goto out;
2342         }
2343
2344         req->data = scmnd;
2345         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2346         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2347         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2348         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2349         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2350         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2351
2352         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2353
2354         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2355         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2356
2357         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2358         if (!zfcp_fsf_req_send(req))
2359                 goto out;
2360
2361         zfcp_fsf_req_free(req);
2362         req = NULL;
2363 out:
2364         spin_unlock_irq(&qdio->req_q_lock);
2365         return req;
2366 }
2367
2368 /**
2369  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2370  * @adapter: pointer to struct zfcp_adapter
2371  * @sbal_idx: response queue index of SBAL to be processed
2372  */
2373 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2374 {
2375         struct zfcp_adapter *adapter = qdio->adapter;
2376         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2377         struct qdio_buffer_element *sbale;
2378         struct zfcp_fsf_req *fsf_req;
2379         unsigned long req_id;
2380         int idx;
2381
2382         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2383
2384                 sbale = &sbal->element[idx];
2385                 req_id = (unsigned long) sbale->addr;
2386                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2387
2388                 if (!fsf_req) {
2389                         /*
2390                          * Unknown request means that we have potentially memory
2391                          * corruption and must stop the machine immediately.
2392                          */
2393                         zfcp_qdio_siosl(adapter);
2394                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2395                               req_id, dev_name(&adapter->ccw_device->dev));
2396                 }
2397
2398                 zfcp_fsf_req_complete(fsf_req);
2399
2400                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2401                         break;
2402         }
2403 }