drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corporation 2002, 2010
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <linux/slab.h>
  14 #include <scsi/fc/fc_els.h>
  15 #include "zfcp_ext.h"
  16 #include "zfcp_fc.h"
  17 #include "zfcp_dbf.h"
  18 #include "zfcp_qdio.h"
  19 #include "zfcp_reqlist.h"
  20
  21 struct kmem_cache *zfcp_fsf_qtcb_cache;
  22
  23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  24 {
  25         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  26         zfcp_qdio_siosl(adapter);
  27         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  28                                 "fsrth_1");
  29 }
  30
  31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  32                                  unsigned long timeout)
  33 {
  34         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  35         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  36         fsf_req->timer.expires = jiffies + timeout;
  37         add_timer(&fsf_req->timer);
  38 }
  39
  40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  41 {
  42         BUG_ON(!fsf_req->erp_action);
  43         fsf_req->timer.function = zfcp_erp_timeout_handler;
  44         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  45         fsf_req->timer.expires = jiffies + 30 * HZ;
  46         add_timer(&fsf_req->timer);
  47 }
  48
  49 /* association between FSF command and FSF QTCB type */
  50 static u32 fsf_qtcb_type[] = {
  51         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  52         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  56         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  61         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  62         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  63         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  64 };
  65
  66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  67 {
  68         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  69                 "operational because of an unsupported FC class\n");
  70         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  71         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  72 }
  73
  74 /**
  75  * zfcp_fsf_req_free - free memory used by fsf request
  76  * @fsf_req: pointer to struct zfcp_fsf_req
  77  */
  78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  79 {
  80         if (likely(req->pool)) {
  81                 if (likely(req->qtcb))
  82                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  83                 mempool_free(req, req->pool);
  84                 return;
  85         }
  86
  87         if (likely(req->qtcb))
  88                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  89         kfree(req);
  90 }
  91
  92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  93 {
  94         unsigned long flags;
  95         struct fsf_status_read_buffer *sr_buf = req->data;
  96         struct zfcp_adapter *adapter = req->adapter;
  97         struct zfcp_port *port;
  98         int d_id = ntoh24(sr_buf->d_id);
  99
 100         read_lock_irqsave(&adapter->port_list_lock, flags);
 101         list_for_each_entry(port, &adapter->port_list, list)
 102                 if (port->d_id == d_id) {
 103                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 104                         break;
 105                 }
 106         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 107 }
 108
 109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 110                                          struct fsf_link_down_info *link_down)
 111 {
 112         struct zfcp_adapter *adapter = req->adapter;
 113
 114         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 115                 return;
 116
 117         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 118
 119         zfcp_scsi_schedule_rports_block(adapter);
 120
 121         if (!link_down)
 122                 goto out;
 123
 124         switch (link_down->error_code) {
 125         case FSF_PSQ_LINK_NO_LIGHT:
 126                 dev_warn(&req->adapter->ccw_device->dev,
 127                          "There is no light signal from the local "
 128                          "fibre channel cable\n");
 129                 break;
 130         case FSF_PSQ_LINK_WRAP_PLUG:
 131                 dev_warn(&req->adapter->ccw_device->dev,
 132                          "There is a wrap plug instead of a fibre "
 133                          "channel cable\n");
 134                 break;
 135         case FSF_PSQ_LINK_NO_FCP:
 136                 dev_warn(&req->adapter->ccw_device->dev,
 137                          "The adjacent fibre channel node does not "
 138                          "support FCP\n");
 139                 break;
 140         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 141                 dev_warn(&req->adapter->ccw_device->dev,
 142                          "The FCP device is suspended because of a "
 143                          "firmware update\n");
 144                 break;
 145         case FSF_PSQ_LINK_INVALID_WWPN:
 146                 dev_warn(&req->adapter->ccw_device->dev,
 147                          "The FCP device detected a WWPN that is "
 148                          "duplicate or not valid\n");
 149                 break;
 150         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 151                 dev_warn(&req->adapter->ccw_device->dev,
 152                          "The fibre channel fabric does not support NPIV\n");
 153                 break;
 154         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 155                 dev_warn(&req->adapter->ccw_device->dev,
 156                          "The FCP adapter cannot support more NPIV ports\n");
 157                 break;
 158         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 159                 dev_warn(&req->adapter->ccw_device->dev,
 160                          "The adjacent switch cannot support "
 161                          "more NPIV ports\n");
 162                 break;
 163         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "The FCP adapter could not log in to the "
 166                          "fibre channel fabric\n");
 167                 break;
 168         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The WWPN assignment file on the FCP adapter "
 171                          "has been damaged\n");
 172                 break;
 173         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The mode table on the FCP adapter "
 176                          "has been damaged\n");
 177                 break;
 178         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "All NPIV ports on the FCP adapter have "
 181                          "been assigned\n");
 182                 break;
 183         default:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "The link between the FCP adapter and "
 186                          "the FC fabric is down\n");
 187         }
 188 out:
 189         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 190 }
 191
 192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 193 {
 194         struct fsf_status_read_buffer *sr_buf = req->data;
 195         struct fsf_link_down_info *ldi =
 196                 (struct fsf_link_down_info *) &sr_buf->payload;
 197
 198         switch (sr_buf->status_subtype) {
 199         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 200                 zfcp_fsf_link_down_info_eval(req, ldi);
 201                 break;
 202         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 203                 zfcp_fsf_link_down_info_eval(req, ldi);
 204                 break;
 205         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 206                 zfcp_fsf_link_down_info_eval(req, NULL);
 207         };
 208 }
 209
 210 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 211 {
 212         struct zfcp_adapter *adapter = req->adapter;
 213         struct fsf_status_read_buffer *sr_buf = req->data;
 214
 215         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 216                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 217                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 218                 zfcp_fsf_req_free(req);
 219                 return;
 220         }
 221
 222         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 223
 224         switch (sr_buf->status_type) {
 225         case FSF_STATUS_READ_PORT_CLOSED:
 226                 zfcp_fsf_status_read_port_closed(req);
 227                 break;
 228         case FSF_STATUS_READ_INCOMING_ELS:
 229                 zfcp_fc_incoming_els(req);
 230                 break;
 231         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 232                 break;
 233         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 234                 dev_warn(&adapter->ccw_device->dev,
 235                          "The error threshold for checksum statistics "
 236                          "has been exceeded\n");
 237                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 238                 break;
 239         case FSF_STATUS_READ_LINK_DOWN:
 240                 zfcp_fsf_status_read_link_down(req);
 241                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 242                 break;
 243         case FSF_STATUS_READ_LINK_UP:
 244                 dev_info(&adapter->ccw_device->dev,
 245                          "The local link has been restored\n");
 246                 /* All ports should be marked as ready to run again */
 247                 zfcp_erp_set_adapter_status(adapter,
 248                                             ZFCP_STATUS_COMMON_RUNNING);
 249                 zfcp_erp_adapter_reopen(adapter,
 250                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 251                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 252                                         "fssrh_2");
 253                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 254
 255                 break;
 256         case FSF_STATUS_READ_NOTIFICATION_LOST:
 257                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 258                         zfcp_cfdc_adapter_access_changed(adapter);
 259                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 260                         queue_work(adapter->work_queue, &adapter->scan_work);
 261                 break;
 262         case FSF_STATUS_READ_CFDC_UPDATED:
 263                 zfcp_cfdc_adapter_access_changed(adapter);
 264                 break;
 265         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 266                 adapter->adapter_features = sr_buf->payload.word[0];
 267                 break;
 268         }
 269
 270         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 271         zfcp_fsf_req_free(req);
 272
 273         atomic_inc(&adapter->stat_miss);
 274         queue_work(adapter->work_queue, &adapter->stat_work);
 275 }
 276
 277 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 278 {
 279         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 280         case FSF_SQ_FCP_RSP_AVAILABLE:
 281         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 282         case FSF_SQ_NO_RETRY_POSSIBLE:
 283         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 284                 return;
 285         case FSF_SQ_COMMAND_ABORTED:
 286                 break;
 287         case FSF_SQ_NO_RECOM:
 288                 dev_err(&req->adapter->ccw_device->dev,
 289                         "The FCP adapter reported a problem "
 290                         "that cannot be recovered\n");
 291                 zfcp_qdio_siosl(req->adapter);
 292                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 293                 break;
 294         }
 295         /* all non-return stats set FSFREQ_ERROR*/
 296         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 297 }
 298
 299 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 300 {
 301         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 302                 return;
 303
 304         switch (req->qtcb->header.fsf_status) {
 305         case FSF_UNKNOWN_COMMAND:
 306                 dev_err(&req->adapter->ccw_device->dev,
 307                         "The FCP adapter does not recognize the command 0x%x\n",
 308                         req->qtcb->header.fsf_command);
 309                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 310                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 311                 break;
 312         case FSF_ADAPTER_STATUS_AVAILABLE:
 313                 zfcp_fsf_fsfstatus_qual_eval(req);
 314                 break;
 315         }
 316 }
 317
 318 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 319 {
 320         struct zfcp_adapter *adapter = req->adapter;
 321         struct fsf_qtcb *qtcb = req->qtcb;
 322         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 323
 324         zfcp_dbf_hba_fsf_response(req);
 325
 326         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 327                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 328                 return;
 329         }
 330
 331         switch (qtcb->prefix.prot_status) {
 332         case FSF_PROT_GOOD:
 333         case FSF_PROT_FSF_STATUS_PRESENTED:
 334                 return;
 335         case FSF_PROT_QTCB_VERSION_ERROR:
 336                 dev_err(&adapter->ccw_device->dev,
 337                         "QTCB version 0x%x not supported by FCP adapter "
 338                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 339                         psq->word[0], psq->word[1]);
 340                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 341                 break;
 342         case FSF_PROT_ERROR_STATE:
 343         case FSF_PROT_SEQ_NUMB_ERROR:
 344                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 345                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 346                 break;
 347         case FSF_PROT_UNSUPP_QTCB_TYPE:
 348                 dev_err(&adapter->ccw_device->dev,
 349                         "The QTCB type is not supported by the FCP adapter\n");
 350                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 351                 break;
 352         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 353                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 354                                 &adapter->status);
 355                 break;
 356         case FSF_PROT_DUPLICATE_REQUEST_ID:
 357                 dev_err(&adapter->ccw_device->dev,
 358                         "0x%Lx is an ambiguous request identifier\n",
 359                         (unsigned long long)qtcb->bottom.support.req_handle);
 360                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 361                 break;
 362         case FSF_PROT_LINK_DOWN:
 363                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 364                 /* go through reopen to flush pending requests */
 365                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 366                 break;
 367         case FSF_PROT_REEST_QUEUE:
 368                 /* All ports should be marked as ready to run again */
 369                 zfcp_erp_set_adapter_status(adapter,
 370                                             ZFCP_STATUS_COMMON_RUNNING);
 371                 zfcp_erp_adapter_reopen(adapter,
 372                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 373                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 374                                         "fspse_8");
 375                 break;
 376         default:
 377                 dev_err(&adapter->ccw_device->dev,
 378                         "0x%x is not a valid transfer protocol status\n",
 379                         qtcb->prefix.prot_status);
 380                 zfcp_qdio_siosl(adapter);
 381                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 382         }
 383         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 384 }
 385
 386 /**
 387  * zfcp_fsf_req_complete - process completion of a FSF request
 388  * @fsf_req: The FSF request that has been completed.
 389  *
 390  * When a request has been completed either from the FCP adapter,
 391  * or it has been dismissed due to a queue shutdown, this function
 392  * is called to process the completion status and trigger further
 393  * events related to the FSF request.
 394  */
 395 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 396 {
 397         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 398                 zfcp_fsf_status_read_handler(req);
 399                 return;
 400         }
 401
 402         del_timer(&req->timer);
 403         zfcp_fsf_protstatus_eval(req);
 404         zfcp_fsf_fsfstatus_eval(req);
 405         req->handler(req);
 406
 407         if (req->erp_action)
 408                 zfcp_erp_notify(req->erp_action, 0);
 409
 410         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 411                 zfcp_fsf_req_free(req);
 412         else
 413                 complete(&req->completion);
 414 }
 415
 416 /**
 417  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 418  * @adapter: pointer to struct zfcp_adapter
 419  *
 420  * Never ever call this without shutting down the adapter first.
 421  * Otherwise the adapter would continue using and corrupting s390 storage.
 422  * Included BUG_ON() call to ensure this is done.
 423  * ERP is supposed to be the only user of this function.
 424  */
 425 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 426 {
 427         struct zfcp_fsf_req *req, *tmp;
 428         LIST_HEAD(remove_queue);
 429
 430         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 431         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 432
 433         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 434                 list_del(&req->list);
 435                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 436                 zfcp_fsf_req_complete(req);
 437         }
 438 }
 439
 440 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 441 {
 442         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 443         struct zfcp_adapter *adapter = req->adapter;
 444         struct Scsi_Host *shost = adapter->scsi_host;
 445         struct fc_els_flogi *nsp, *plogi;
 446
 447         /* adjust pointers for missing command code */
 448         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 449                                         - sizeof(u32));
 450         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 451                                         - sizeof(u32));
 452
 453         if (req->data)
 454                 memcpy(req->data, bottom, sizeof(*bottom));
 455
 456         fc_host_port_name(shost) = nsp->fl_wwpn;
 457         fc_host_node_name(shost) = nsp->fl_wwnn;
 458         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 459         fc_host_speed(shost) = bottom->fc_link_speed;
 460         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 461
 462         adapter->hydra_version = bottom->adapter_type;
 463         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 464         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 465                                          (u16)FSF_STATUS_READS_RECOM);
 466
 467         if (fc_host_permanent_port_name(shost) == -1)
 468                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 469
 470         switch (bottom->fc_topology) {
 471         case FSF_TOPO_P2P:
 472                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 473                 adapter->peer_wwpn = plogi->fl_wwpn;
 474                 adapter->peer_wwnn = plogi->fl_wwnn;
 475                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 476                 break;
 477         case FSF_TOPO_FABRIC:
 478                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 479                 break;
 480         case FSF_TOPO_AL:
 481                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 482                 /* fall through */
 483         default:
 484                 dev_err(&adapter->ccw_device->dev,
 485                         "Unknown or unsupported arbitrated loop "
 486                         "fibre channel topology detected\n");
 487                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 488                 return -EIO;
 489         }
 490
 491         zfcp_scsi_set_prot(adapter);
 492
 493         return 0;
 494 }
 495
 496 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 497 {
 498         struct zfcp_adapter *adapter = req->adapter;
 499         struct fsf_qtcb *qtcb = req->qtcb;
 500         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 501         struct Scsi_Host *shost = adapter->scsi_host;
 502
 503         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 504                 return;
 505
 506         adapter->fsf_lic_version = bottom->lic_version;
 507         adapter->adapter_features = bottom->adapter_features;
 508         adapter->connection_features = bottom->connection_features;
 509         adapter->peer_wwpn = 0;
 510         adapter->peer_wwnn = 0;
 511         adapter->peer_d_id = 0;
 512
 513         switch (qtcb->header.fsf_status) {
 514         case FSF_GOOD:
 515                 if (zfcp_fsf_exchange_config_evaluate(req))
 516                         return;
 517
 518                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 519                         dev_err(&adapter->ccw_device->dev,
 520                                 "FCP adapter maximum QTCB size (%d bytes) "
 521                                 "is too small\n",
 522                                 bottom->max_qtcb_size);
 523                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 524                         return;
 525                 }
 526                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 527                                 &adapter->status);
 528                 break;
 529         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 530                 fc_host_node_name(shost) = 0;
 531                 fc_host_port_name(shost) = 0;
 532                 fc_host_port_id(shost) = 0;
 533                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 534                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 535                 adapter->hydra_version = 0;
 536
 537                 zfcp_fsf_link_down_info_eval(req,
 538                         &qtcb->header.fsf_status_qual.link_down_info);
 539                 break;
 540         default:
 541                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 542                 return;
 543         }
 544
 545         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 546                 adapter->hardware_version = bottom->hardware_version;
 547                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 548                        min(FC_SERIAL_NUMBER_SIZE, 17));
 549                 EBCASC(fc_host_serial_number(shost),
 550                        min(FC_SERIAL_NUMBER_SIZE, 17));
 551         }
 552
 553         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 554                 dev_err(&adapter->ccw_device->dev,
 555                         "The FCP adapter only supports newer "
 556                         "control block versions\n");
 557                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 558                 return;
 559         }
 560         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 561                 dev_err(&adapter->ccw_device->dev,
 562                         "The FCP adapter only supports older "
 563                         "control block versions\n");
 564                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 565         }
 566 }
 567
 568 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 569 {
 570         struct zfcp_adapter *adapter = req->adapter;
 571         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 572         struct Scsi_Host *shost = adapter->scsi_host;
 573
 574         if (req->data)
 575                 memcpy(req->data, bottom, sizeof(*bottom));
 576
 577         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 578                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 579                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 580         } else
 581                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 582         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 583         fc_host_supported_speeds(shost) = bottom->supported_speed;
 584         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 585                FC_FC4_LIST_SIZE);
 586         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 587                FC_FC4_LIST_SIZE);
 588 }
 589
 590 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 591 {
 592         struct fsf_qtcb *qtcb = req->qtcb;
 593
 594         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 595                 return;
 596
 597         switch (qtcb->header.fsf_status) {
 598         case FSF_GOOD:
 599                 zfcp_fsf_exchange_port_evaluate(req);
 600                 break;
 601         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 602                 zfcp_fsf_exchange_port_evaluate(req);
 603                 zfcp_fsf_link_down_info_eval(req,
 604                         &qtcb->header.fsf_status_qual.link_down_info);
 605                 break;
 606         }
 607 }
 608
 609 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 610 {
 611         struct zfcp_fsf_req *req;
 612
 613         if (likely(pool))
 614                 req = mempool_alloc(pool, GFP_ATOMIC);
 615         else
 616                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 617
 618         if (unlikely(!req))
 619                 return NULL;
 620
 621         memset(req, 0, sizeof(*req));
 622         req->pool = pool;
 623         return req;
 624 }
 625
 626 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 627 {
 628         struct fsf_qtcb *qtcb;
 629
 630         if (likely(pool))
 631                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 632         else
 633                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 634
 635         if (unlikely(!qtcb))
 636                 return NULL;
 637
 638         memset(qtcb, 0, sizeof(*qtcb));
 639         return qtcb;
 640 }
 641
 642 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 643                                                 u32 fsf_cmd, u8 sbtype,
 644                                                 mempool_t *pool)
 645 {
 646         struct zfcp_adapter *adapter = qdio->adapter;
 647         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 648
 649         if (unlikely(!req))
 650                 return ERR_PTR(-ENOMEM);
 651
 652         if (adapter->req_no == 0)
 653                 adapter->req_no++;
 654
 655         INIT_LIST_HEAD(&req->list);
 656         init_timer(&req->timer);
 657         init_completion(&req->completion);
 658
 659         req->adapter = adapter;
 660         req->fsf_command = fsf_cmd;
 661         req->req_id = adapter->req_no;
 662
 663         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 664                 if (likely(pool))
 665                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 666                 else
 667                         req->qtcb = zfcp_qtcb_alloc(NULL);
 668
 669                 if (unlikely(!req->qtcb)) {
 670                         zfcp_fsf_req_free(req);
 671                         return ERR_PTR(-ENOMEM);
 672                 }
 673
 674                 req->seq_no = adapter->fsf_req_seq_no;
 675                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 676                 req->qtcb->prefix.req_id = req->req_id;
 677                 req->qtcb->prefix.ulp_info = 26;
 678                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 679                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 680                 req->qtcb->header.req_handle = req->req_id;
 681                 req->qtcb->header.fsf_command = req->fsf_command;
 682         }
 683
 684         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 685                            req->qtcb, sizeof(struct fsf_qtcb));
 686
 687         return req;
 688 }
 689
 690 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 691 {
 692         struct zfcp_adapter *adapter = req->adapter;
 693         struct zfcp_qdio *qdio = adapter->qdio;
 694         int with_qtcb = (req->qtcb != NULL);
 695         int req_id = req->req_id;
 696
 697         zfcp_reqlist_add(adapter->req_list, req);
 698
 699         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 700         req->issued = get_clock();
 701         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 702                 del_timer(&req->timer);
 703                 /* lookup request again, list might have changed */
 704                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 705                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 706                 return -EIO;
 707         }
 708
 709         /* Don't increase for unsolicited status */
 710         if (with_qtcb)
 711                 adapter->fsf_req_seq_no++;
 712         adapter->req_no++;
 713
 714         return 0;
 715 }
 716
 717 /**
 718  * zfcp_fsf_status_read - send status read request
 719  * @adapter: pointer to struct zfcp_adapter
 720  * @req_flags: request flags
 721  * Returns: 0 on success, ERROR otherwise
 722  */
 723 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 724 {
 725         struct zfcp_adapter *adapter = qdio->adapter;
 726         struct zfcp_fsf_req *req;
 727         struct fsf_status_read_buffer *sr_buf;
 728         struct page *page;
 729         int retval = -EIO;
 730
 731         spin_lock_irq(&qdio->req_q_lock);
 732         if (zfcp_qdio_sbal_get(qdio))
 733                 goto out;
 734
 735         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
 736                                   adapter->pool.status_read_req);
 737         if (IS_ERR(req)) {
 738                 retval = PTR_ERR(req);
 739                 goto out;
 740         }
 741
 742         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 743         if (!page) {
 744                 retval = -ENOMEM;
 745                 goto failed_buf;
 746         }
 747         sr_buf = page_address(page);
 748         memset(sr_buf, 0, sizeof(*sr_buf));
 749         req->data = sr_buf;
 750
 751         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 752         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 753
 754         retval = zfcp_fsf_req_send(req);
 755         if (retval)
 756                 goto failed_req_send;
 757
 758         goto out;
 759
 760 failed_req_send:
 761         req->data = NULL;
 762         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 763 failed_buf:
 764         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 765         zfcp_fsf_req_free(req);
 766 out:
 767         spin_unlock_irq(&qdio->req_q_lock);
 768         return retval;
 769 }
 770
 771 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 772 {
 773         struct scsi_device *sdev = req->data;
 774         struct zfcp_scsi_dev *zfcp_sdev;
 775         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 776
 777         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 778                 return;
 779
 780         zfcp_sdev = sdev_to_zfcp(sdev);
 781
 782         switch (req->qtcb->header.fsf_status) {
 783         case FSF_PORT_HANDLE_NOT_VALID:
 784                 if (fsq->word[0] == fsq->word[1]) {
 785                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 786                                                 "fsafch1");
 787                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 788                 }
 789                 break;
 790         case FSF_LUN_HANDLE_NOT_VALID:
 791                 if (fsq->word[0] == fsq->word[1]) {
 792                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 793                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 794                 }
 795                 break;
 796         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 797                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 798                 break;
 799         case FSF_PORT_BOXED:
 800                 zfcp_erp_set_port_status(zfcp_sdev->port,
 801                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 802                 zfcp_erp_port_reopen(zfcp_sdev->port,
 803                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 804                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 805                 break;
 806         case FSF_LUN_BOXED:
 807                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 808                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 809                                     "fsafch4");
 810                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 811                 break;
 812         case FSF_ADAPTER_STATUS_AVAILABLE:
 813                 switch (fsq->word[0]) {
 814                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 815                         zfcp_fc_test_link(zfcp_sdev->port);
 816                         /* fall through */
 817                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 818                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 819                         break;
 820                 }
 821                 break;
 822         case FSF_GOOD:
 823                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 824                 break;
 825         }
 826 }
 827
 828 /**
 829  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 830  * @scmnd: The SCSI command to abort
 831  * Returns: pointer to struct zfcp_fsf_req
 832  */
 833
 834 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 835 {
 836         struct zfcp_fsf_req *req = NULL;
 837         struct scsi_device *sdev = scmnd->device;
 838         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 839         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 840         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 841
 842         spin_lock_irq(&qdio->req_q_lock);
 843         if (zfcp_qdio_sbal_get(qdio))
 844                 goto out;
 845         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 846                                   SBAL_SFLAGS0_TYPE_READ,
 847                                   qdio->adapter->pool.scsi_abort);
 848         if (IS_ERR(req)) {
 849                 req = NULL;
 850                 goto out;
 851         }
 852
 853         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 854                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 855                 goto out_error_free;
 856
 857         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 858
 859         req->data = sdev;
 860         req->handler = zfcp_fsf_abort_fcp_command_handler;
 861         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 862         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 863         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 864
 865         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 866         if (!zfcp_fsf_req_send(req))
 867                 goto out;
 868
 869 out_error_free:
 870         zfcp_fsf_req_free(req);
 871         req = NULL;
 872 out:
 873         spin_unlock_irq(&qdio->req_q_lock);
 874         return req;
 875 }
 876
 877 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 878 {
 879         struct zfcp_adapter *adapter = req->adapter;
 880         struct zfcp_fsf_ct_els *ct = req->data;
 881         struct fsf_qtcb_header *header = &req->qtcb->header;
 882
 883         ct->status = -EINVAL;
 884
 885         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 886                 goto skip_fsfstatus;
 887
 888         switch (header->fsf_status) {
 889         case FSF_GOOD:
 890                 zfcp_dbf_san_res("fsscth2", req);
 891                 ct->status = 0;
 892                 break;
 893         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 894                 zfcp_fsf_class_not_supp(req);
 895                 break;
 896         case FSF_ADAPTER_STATUS_AVAILABLE:
 897                 switch (header->fsf_status_qual.word[0]){
 898                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 899                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 900                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 901                         break;
 902                 }
 903                 break;
 904         case FSF_ACCESS_DENIED:
 905                 break;
 906         case FSF_PORT_BOXED:
 907                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 908                 break;
 909         case FSF_PORT_HANDLE_NOT_VALID:
 910                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 911                 /* fall through */
 912         case FSF_GENERIC_COMMAND_REJECTED:
 913         case FSF_PAYLOAD_SIZE_MISMATCH:
 914         case FSF_REQUEST_SIZE_TOO_LARGE:
 915         case FSF_RESPONSE_SIZE_TOO_LARGE:
 916         case FSF_SBAL_MISMATCH:
 917                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 918                 break;
 919         }
 920
 921 skip_fsfstatus:
 922         if (ct->handler)
 923                 ct->handler(ct->handler_data);
 924 }
 925
 926 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 927                                             struct zfcp_qdio_req *q_req,
 928                                             struct scatterlist *sg_req,
 929                                             struct scatterlist *sg_resp)
 930 {
 931         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 932         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 933         zfcp_qdio_set_sbale_last(qdio, q_req);
 934 }
 935
 936 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 937                                        struct scatterlist *sg_req,
 938                                        struct scatterlist *sg_resp)
 939 {
 940         struct zfcp_adapter *adapter = req->adapter;
 941         struct zfcp_qdio *qdio = adapter->qdio;
 942         struct fsf_qtcb *qtcb = req->qtcb;
 943         u32 feat = adapter->adapter_features;
 944
 945         if (zfcp_adapter_multi_buffer_active(adapter)) {
 946                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 947                         return -EIO;
 948                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 949                         return -EIO;
 950
 951                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
 952                                         zfcp_qdio_sbale_count(sg_req));
 953                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 954                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
 955                 return 0;
 956         }
 957
 958         /* use single, unchained SBAL if it can hold the request */
 959         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 960                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
 961                                                 sg_req, sg_resp);
 962                 return 0;
 963         }
 964
 965         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
 966                 return -EOPNOTSUPP;
 967
 968         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 969                 return -EIO;
 970
 971         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
 972
 973         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 974         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
 975
 976         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 977                 return -EIO;
 978
 979         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
 980
 981         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 982
 983         return 0;
 984 }
 985
 986 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
 987                                  struct scatterlist *sg_req,
 988                                  struct scatterlist *sg_resp,
 989                                  unsigned int timeout)
 990 {
 991         int ret;
 992
 993         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
 994         if (ret)
 995                 return ret;
 996
 997         /* common settings for ct/gs and els requests */
 998         if (timeout > 255)
 999                 timeout = 255; /* max value accepted by hardware */
1000         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1001         req->qtcb->bottom.support.timeout = timeout;
1002         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1003
1004         return 0;
1005 }
1006
1007 /**
1008  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1009  * @ct: pointer to struct zfcp_send_ct with data for request
1010  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1011  */
1012 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1013                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1014                      unsigned int timeout)
1015 {
1016         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1017         struct zfcp_fsf_req *req;
1018         int ret = -EIO;
1019
1020         spin_lock_irq(&qdio->req_q_lock);
1021         if (zfcp_qdio_sbal_get(qdio))
1022                 goto out;
1023
1024         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1025                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1026
1027         if (IS_ERR(req)) {
1028                 ret = PTR_ERR(req);
1029                 goto out;
1030         }
1031
1032         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1033         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1034         if (ret)
1035                 goto failed_send;
1036
1037         req->handler = zfcp_fsf_send_ct_handler;
1038         req->qtcb->header.port_handle = wka_port->handle;
1039         req->data = ct;
1040
1041         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1042
1043         ret = zfcp_fsf_req_send(req);
1044         if (ret)
1045                 goto failed_send;
1046
1047         goto out;
1048
1049 failed_send:
1050         zfcp_fsf_req_free(req);
1051 out:
1052         spin_unlock_irq(&qdio->req_q_lock);
1053         return ret;
1054 }
1055
1056 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1057 {
1058         struct zfcp_fsf_ct_els *send_els = req->data;
1059         struct zfcp_port *port = send_els->port;
1060         struct fsf_qtcb_header *header = &req->qtcb->header;
1061
1062         send_els->status = -EINVAL;
1063
1064         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1065                 goto skip_fsfstatus;
1066
1067         switch (header->fsf_status) {
1068         case FSF_GOOD:
1069                 zfcp_dbf_san_res("fsselh1", req);
1070                 send_els->status = 0;
1071                 break;
1072         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1073                 zfcp_fsf_class_not_supp(req);
1074                 break;
1075         case FSF_ADAPTER_STATUS_AVAILABLE:
1076                 switch (header->fsf_status_qual.word[0]){
1077                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1078                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1079                 case FSF_SQ_RETRY_IF_POSSIBLE:
1080                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1081                         break;
1082                 }
1083                 break;
1084         case FSF_ELS_COMMAND_REJECTED:
1085         case FSF_PAYLOAD_SIZE_MISMATCH:
1086         case FSF_REQUEST_SIZE_TOO_LARGE:
1087         case FSF_RESPONSE_SIZE_TOO_LARGE:
1088                 break;
1089         case FSF_ACCESS_DENIED:
1090                 if (port) {
1091                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1092                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1093                 }
1094                 break;
1095         case FSF_SBAL_MISMATCH:
1096                 /* should never occur, avoided in zfcp_fsf_send_els */
1097                 /* fall through */
1098         default:
1099                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1100                 break;
1101         }
1102 skip_fsfstatus:
1103         if (send_els->handler)
1104                 send_els->handler(send_els->handler_data);
1105 }
1106
1107 /**
1108  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1109  * @els: pointer to struct zfcp_send_els with data for the command
1110  */
1111 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1112                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1113 {
1114         struct zfcp_fsf_req *req;
1115         struct zfcp_qdio *qdio = adapter->qdio;
1116         int ret = -EIO;
1117
1118         spin_lock_irq(&qdio->req_q_lock);
1119         if (zfcp_qdio_sbal_get(qdio))
1120                 goto out;
1121
1122         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1123                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1124
1125         if (IS_ERR(req)) {
1126                 ret = PTR_ERR(req);
1127                 goto out;
1128         }
1129
1130         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1131
1132         if (!zfcp_adapter_multi_buffer_active(adapter))
1133                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1134
1135         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1136
1137         if (ret)
1138                 goto failed_send;
1139
1140         hton24(req->qtcb->bottom.support.d_id, d_id);
1141         req->handler = zfcp_fsf_send_els_handler;
1142         req->data = els;
1143
1144         zfcp_dbf_san_req("fssels1", req, d_id);
1145
1146         ret = zfcp_fsf_req_send(req);
1147         if (ret)
1148                 goto failed_send;
1149
1150         goto out;
1151
1152 failed_send:
1153         zfcp_fsf_req_free(req);
1154 out:
1155         spin_unlock_irq(&qdio->req_q_lock);
1156         return ret;
1157 }
1158
1159 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1160 {
1161         struct zfcp_fsf_req *req;
1162         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1163         int retval = -EIO;
1164
1165         spin_lock_irq(&qdio->req_q_lock);
1166         if (zfcp_qdio_sbal_get(qdio))
1167                 goto out;
1168
1169         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1170                                   SBAL_SFLAGS0_TYPE_READ,
1171                                   qdio->adapter->pool.erp_req);
1172
1173         if (IS_ERR(req)) {
1174                 retval = PTR_ERR(req);
1175                 goto out;
1176         }
1177
1178         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1179         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1180
1181         req->qtcb->bottom.config.feature_selection =
1182                         FSF_FEATURE_CFDC |
1183                         FSF_FEATURE_LUN_SHARING |
1184                         FSF_FEATURE_NOTIFICATION_LOST |
1185                         FSF_FEATURE_UPDATE_ALERT;
1186         req->erp_action = erp_action;
1187         req->handler = zfcp_fsf_exchange_config_data_handler;
1188         erp_action->fsf_req_id = req->req_id;
1189
1190         zfcp_fsf_start_erp_timer(req);
1191         retval = zfcp_fsf_req_send(req);
1192         if (retval) {
1193                 zfcp_fsf_req_free(req);
1194                 erp_action->fsf_req_id = 0;
1195         }
1196 out:
1197         spin_unlock_irq(&qdio->req_q_lock);
1198         return retval;
1199 }
1200
1201 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1202                                        struct fsf_qtcb_bottom_config *data)
1203 {
1204         struct zfcp_fsf_req *req = NULL;
1205         int retval = -EIO;
1206
1207         spin_lock_irq(&qdio->req_q_lock);
1208         if (zfcp_qdio_sbal_get(qdio))
1209                 goto out_unlock;
1210
1211         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1212                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1213
1214         if (IS_ERR(req)) {
1215                 retval = PTR_ERR(req);
1216                 goto out_unlock;
1217         }
1218
1219         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1220         req->handler = zfcp_fsf_exchange_config_data_handler;
1221
1222         req->qtcb->bottom.config.feature_selection =
1223                         FSF_FEATURE_CFDC |
1224                         FSF_FEATURE_LUN_SHARING |
1225                         FSF_FEATURE_NOTIFICATION_LOST |
1226                         FSF_FEATURE_UPDATE_ALERT;
1227
1228         if (data)
1229                 req->data = data;
1230
1231         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1232         retval = zfcp_fsf_req_send(req);
1233         spin_unlock_irq(&qdio->req_q_lock);
1234         if (!retval)
1235                 wait_for_completion(&req->completion);
1236
1237         zfcp_fsf_req_free(req);
1238         return retval;
1239
1240 out_unlock:
1241         spin_unlock_irq(&qdio->req_q_lock);
1242         return retval;
1243 }
1244
1245 /**
1246  * zfcp_fsf_exchange_port_data - request information about local port
1247  * @erp_action: ERP action for the adapter for which port data is requested
1248  * Returns: 0 on success, error otherwise
1249  */
1250 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1251 {
1252         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1253         struct zfcp_fsf_req *req;
1254         int retval = -EIO;
1255
1256         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1257                 return -EOPNOTSUPP;
1258
1259         spin_lock_irq(&qdio->req_q_lock);
1260         if (zfcp_qdio_sbal_get(qdio))
1261                 goto out;
1262
1263         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1264                                   SBAL_SFLAGS0_TYPE_READ,
1265                                   qdio->adapter->pool.erp_req);
1266
1267         if (IS_ERR(req)) {
1268                 retval = PTR_ERR(req);
1269                 goto out;
1270         }
1271
1272         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1273         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1274
1275         req->handler = zfcp_fsf_exchange_port_data_handler;
1276         req->erp_action = erp_action;
1277         erp_action->fsf_req_id = req->req_id;
1278
1279         zfcp_fsf_start_erp_timer(req);
1280         retval = zfcp_fsf_req_send(req);
1281         if (retval) {
1282                 zfcp_fsf_req_free(req);
1283                 erp_action->fsf_req_id = 0;
1284         }
1285 out:
1286         spin_unlock_irq(&qdio->req_q_lock);
1287         return retval;
1288 }
1289
1290 /**
1291  * zfcp_fsf_exchange_port_data_sync - request information about local port
1292  * @qdio: pointer to struct zfcp_qdio
1293  * @data: pointer to struct fsf_qtcb_bottom_port
1294  * Returns: 0 on success, error otherwise
1295  */
1296 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1297                                      struct fsf_qtcb_bottom_port *data)
1298 {
1299         struct zfcp_fsf_req *req = NULL;
1300         int retval = -EIO;
1301
1302         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1303                 return -EOPNOTSUPP;
1304
1305         spin_lock_irq(&qdio->req_q_lock);
1306         if (zfcp_qdio_sbal_get(qdio))
1307                 goto out_unlock;
1308
1309         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1310                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1311
1312         if (IS_ERR(req)) {
1313                 retval = PTR_ERR(req);
1314                 goto out_unlock;
1315         }
1316
1317         if (data)
1318                 req->data = data;
1319
1320         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1321
1322         req->handler = zfcp_fsf_exchange_port_data_handler;
1323         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1324         retval = zfcp_fsf_req_send(req);
1325         spin_unlock_irq(&qdio->req_q_lock);
1326
1327         if (!retval)
1328                 wait_for_completion(&req->completion);
1329
1330         zfcp_fsf_req_free(req);
1331
1332         return retval;
1333
1334 out_unlock:
1335         spin_unlock_irq(&qdio->req_q_lock);
1336         return retval;
1337 }
1338
1339 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1340 {
1341         struct zfcp_port *port = req->data;
1342         struct fsf_qtcb_header *header = &req->qtcb->header;
1343         struct fc_els_flogi *plogi;
1344
1345         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1346                 goto out;
1347
1348         switch (header->fsf_status) {
1349         case FSF_PORT_ALREADY_OPEN:
1350                 break;
1351         case FSF_ACCESS_DENIED:
1352                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1353                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1354                 break;
1355         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1356                 dev_warn(&req->adapter->ccw_device->dev,
1357                          "Not enough FCP adapter resources to open "
1358                          "remote port 0x%016Lx\n",
1359                          (unsigned long long)port->wwpn);
1360                 zfcp_erp_set_port_status(port,
1361                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1362                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1363                 break;
1364         case FSF_ADAPTER_STATUS_AVAILABLE:
1365                 switch (header->fsf_status_qual.word[0]) {
1366                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1367                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1368                 case FSF_SQ_NO_RETRY_POSSIBLE:
1369                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1370                         break;
1371                 }
1372                 break;
1373         case FSF_GOOD:
1374                 port->handle = header->port_handle;
1375                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1376                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1377                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1378                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1379                                   &port->status);
1380                 /* check whether D_ID has changed during open */
1381                 /*
1382                  * FIXME: This check is not airtight, as the FCP channel does
1383                  * not monitor closures of target port connections caused on
1384                  * the remote side. Thus, they might miss out on invalidating
1385                  * locally cached WWPNs (and other N_Port parameters) of gone
1386                  * target ports. So, our heroic attempt to make things safe
1387                  * could be undermined by 'open port' response data tagged with
1388                  * obsolete WWPNs. Another reason to monitor potential
1389                  * connection closures ourself at least (by interpreting
1390                  * incoming ELS' and unsolicited status). It just crosses my
1391                  * mind that one should be able to cross-check by means of
1392                  * another GID_PN straight after a port has been opened.
1393                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1394                  */
1395                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1396                 if (req->qtcb->bottom.support.els1_length >=
1397                     FSF_PLOGI_MIN_LEN)
1398                                 zfcp_fc_plogi_evaluate(port, plogi);
1399                 break;
1400         case FSF_UNKNOWN_OP_SUBTYPE:
1401                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1402                 break;
1403         }
1404
1405 out:
1406         put_device(&port->dev);
1407 }
1408
1409 /**
1410  * zfcp_fsf_open_port - create and send open port request
1411  * @erp_action: pointer to struct zfcp_erp_action
1412  * Returns: 0 on success, error otherwise
1413  */
1414 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1415 {
1416         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1417         struct zfcp_port *port = erp_action->port;
1418         struct zfcp_fsf_req *req;
1419         int retval = -EIO;
1420
1421         spin_lock_irq(&qdio->req_q_lock);
1422         if (zfcp_qdio_sbal_get(qdio))
1423                 goto out;
1424
1425         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1426                                   SBAL_SFLAGS0_TYPE_READ,
1427                                   qdio->adapter->pool.erp_req);
1428
1429         if (IS_ERR(req)) {
1430                 retval = PTR_ERR(req);
1431                 goto out;
1432         }
1433
1434         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1435         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1436
1437         req->handler = zfcp_fsf_open_port_handler;
1438         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1439         req->data = port;
1440         req->erp_action = erp_action;
1441         erp_action->fsf_req_id = req->req_id;
1442         get_device(&port->dev);
1443
1444         zfcp_fsf_start_erp_timer(req);
1445         retval = zfcp_fsf_req_send(req);
1446         if (retval) {
1447                 zfcp_fsf_req_free(req);
1448                 erp_action->fsf_req_id = 0;
1449                 put_device(&port->dev);
1450         }
1451 out:
1452         spin_unlock_irq(&qdio->req_q_lock);
1453         return retval;
1454 }
1455
1456 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1457 {
1458         struct zfcp_port *port = req->data;
1459
1460         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1461                 return;
1462
1463         switch (req->qtcb->header.fsf_status) {
1464         case FSF_PORT_HANDLE_NOT_VALID:
1465                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1466                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1467                 break;
1468         case FSF_ADAPTER_STATUS_AVAILABLE:
1469                 break;
1470         case FSF_GOOD:
1471                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1472                 break;
1473         }
1474 }
1475
1476 /**
1477  * zfcp_fsf_close_port - create and send close port request
1478  * @erp_action: pointer to struct zfcp_erp_action
1479  * Returns: 0 on success, error otherwise
1480  */
1481 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1482 {
1483         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1484         struct zfcp_fsf_req *req;
1485         int retval = -EIO;
1486
1487         spin_lock_irq(&qdio->req_q_lock);
1488         if (zfcp_qdio_sbal_get(qdio))
1489                 goto out;
1490
1491         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1492                                   SBAL_SFLAGS0_TYPE_READ,
1493                                   qdio->adapter->pool.erp_req);
1494
1495         if (IS_ERR(req)) {
1496                 retval = PTR_ERR(req);
1497                 goto out;
1498         }
1499
1500         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1501         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1502
1503         req->handler = zfcp_fsf_close_port_handler;
1504         req->data = erp_action->port;
1505         req->erp_action = erp_action;
1506         req->qtcb->header.port_handle = erp_action->port->handle;
1507         erp_action->fsf_req_id = req->req_id;
1508
1509         zfcp_fsf_start_erp_timer(req);
1510         retval = zfcp_fsf_req_send(req);
1511         if (retval) {
1512                 zfcp_fsf_req_free(req);
1513                 erp_action->fsf_req_id = 0;
1514         }
1515 out:
1516         spin_unlock_irq(&qdio->req_q_lock);
1517         return retval;
1518 }
1519
1520 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1521 {
1522         struct zfcp_fc_wka_port *wka_port = req->data;
1523         struct fsf_qtcb_header *header = &req->qtcb->header;
1524
1525         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1526                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1527                 goto out;
1528         }
1529
1530         switch (header->fsf_status) {
1531         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1532                 dev_warn(&req->adapter->ccw_device->dev,
1533                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1534                 /* fall through */
1535         case FSF_ADAPTER_STATUS_AVAILABLE:
1536                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1537                 /* fall through */
1538         case FSF_ACCESS_DENIED:
1539                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1540                 break;
1541         case FSF_GOOD:
1542                 wka_port->handle = header->port_handle;
1543                 /* fall through */
1544         case FSF_PORT_ALREADY_OPEN:
1545                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1546         }
1547 out:
1548         wake_up(&wka_port->completion_wq);
1549 }
1550
1551 /**
1552  * zfcp_fsf_open_wka_port - create and send open wka-port request
1553  * @wka_port: pointer to struct zfcp_fc_wka_port
1554  * Returns: 0 on success, error otherwise
1555  */
1556 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1557 {
1558         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1559         struct zfcp_fsf_req *req;
1560         int retval = -EIO;
1561
1562         spin_lock_irq(&qdio->req_q_lock);
1563         if (zfcp_qdio_sbal_get(qdio))
1564                 goto out;
1565
1566         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1567                                   SBAL_SFLAGS0_TYPE_READ,
1568                                   qdio->adapter->pool.erp_req);
1569
1570         if (IS_ERR(req)) {
1571                 retval = PTR_ERR(req);
1572                 goto out;
1573         }
1574
1575         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1576         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1577
1578         req->handler = zfcp_fsf_open_wka_port_handler;
1579         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1580         req->data = wka_port;
1581
1582         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1583         retval = zfcp_fsf_req_send(req);
1584         if (retval)
1585                 zfcp_fsf_req_free(req);
1586 out:
1587         spin_unlock_irq(&qdio->req_q_lock);
1588         return retval;
1589 }
1590
1591 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1592 {
1593         struct zfcp_fc_wka_port *wka_port = req->data;
1594
1595         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1596                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1597                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1598         }
1599
1600         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1601         wake_up(&wka_port->completion_wq);
1602 }
1603
1604 /**
1605  * zfcp_fsf_close_wka_port - create and send close wka port request
1606  * @wka_port: WKA port to open
1607  * Returns: 0 on success, error otherwise
1608  */
1609 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1610 {
1611         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1612         struct zfcp_fsf_req *req;
1613         int retval = -EIO;
1614
1615         spin_lock_irq(&qdio->req_q_lock);
1616         if (zfcp_qdio_sbal_get(qdio))
1617                 goto out;
1618
1619         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1620                                   SBAL_SFLAGS0_TYPE_READ,
1621                                   qdio->adapter->pool.erp_req);
1622
1623         if (IS_ERR(req)) {
1624                 retval = PTR_ERR(req);
1625                 goto out;
1626         }
1627
1628         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1629         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1630
1631         req->handler = zfcp_fsf_close_wka_port_handler;
1632         req->data = wka_port;
1633         req->qtcb->header.port_handle = wka_port->handle;
1634
1635         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1636         retval = zfcp_fsf_req_send(req);
1637         if (retval)
1638                 zfcp_fsf_req_free(req);
1639 out:
1640         spin_unlock_irq(&qdio->req_q_lock);
1641         return retval;
1642 }
1643
1644 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1645 {
1646         struct zfcp_port *port = req->data;
1647         struct fsf_qtcb_header *header = &req->qtcb->header;
1648         struct scsi_device *sdev;
1649
1650         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1651                 return;
1652
1653         switch (header->fsf_status) {
1654         case FSF_PORT_HANDLE_NOT_VALID:
1655                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1656                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1657                 break;
1658         case FSF_ACCESS_DENIED:
1659                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1660                 break;
1661         case FSF_PORT_BOXED:
1662                 /* can't use generic zfcp_erp_modify_port_status because
1663                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1664                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1665                 shost_for_each_device(sdev, port->adapter->scsi_host)
1666                         if (sdev_to_zfcp(sdev)->port == port)
1667                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1668                                                   &sdev_to_zfcp(sdev)->status);
1669                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1670                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1671                                      "fscpph2");
1672                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1673                 break;
1674         case FSF_ADAPTER_STATUS_AVAILABLE:
1675                 switch (header->fsf_status_qual.word[0]) {
1676                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1677                         /* fall through */
1678                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1679                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1680                         break;
1681                 }
1682                 break;
1683         case FSF_GOOD:
1684                 /* can't use generic zfcp_erp_modify_port_status because
1685                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1686                  */
1687                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1688                 shost_for_each_device(sdev, port->adapter->scsi_host)
1689                         if (sdev_to_zfcp(sdev)->port == port)
1690                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1691                                                   &sdev_to_zfcp(sdev)->status);
1692                 break;
1693         }
1694 }
1695
1696 /**
1697  * zfcp_fsf_close_physical_port - close physical port
1698  * @erp_action: pointer to struct zfcp_erp_action
1699  * Returns: 0 on success
1700  */
1701 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1702 {
1703         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1704         struct zfcp_fsf_req *req;
1705         int retval = -EIO;
1706
1707         spin_lock_irq(&qdio->req_q_lock);
1708         if (zfcp_qdio_sbal_get(qdio))
1709                 goto out;
1710
1711         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1712                                   SBAL_SFLAGS0_TYPE_READ,
1713                                   qdio->adapter->pool.erp_req);
1714
1715         if (IS_ERR(req)) {
1716                 retval = PTR_ERR(req);
1717                 goto out;
1718         }
1719
1720         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1721         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1722
1723         req->data = erp_action->port;
1724         req->qtcb->header.port_handle = erp_action->port->handle;
1725         req->erp_action = erp_action;
1726         req->handler = zfcp_fsf_close_physical_port_handler;
1727         erp_action->fsf_req_id = req->req_id;
1728
1729         zfcp_fsf_start_erp_timer(req);
1730         retval = zfcp_fsf_req_send(req);
1731         if (retval) {
1732                 zfcp_fsf_req_free(req);
1733                 erp_action->fsf_req_id = 0;
1734         }
1735 out:
1736         spin_unlock_irq(&qdio->req_q_lock);
1737         return retval;
1738 }
1739
1740 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1741 {
1742         struct zfcp_adapter *adapter = req->adapter;
1743         struct scsi_device *sdev = req->data;
1744         struct zfcp_scsi_dev *zfcp_sdev;
1745         struct fsf_qtcb_header *header = &req->qtcb->header;
1746         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1747
1748         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1749                 return;
1750
1751         zfcp_sdev = sdev_to_zfcp(sdev);
1752
1753         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1754                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1755                           ZFCP_STATUS_LUN_SHARED |
1756                           ZFCP_STATUS_LUN_READONLY,
1757                           &zfcp_sdev->status);
1758
1759         switch (header->fsf_status) {
1760
1761         case FSF_PORT_HANDLE_NOT_VALID:
1762                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1763                 /* fall through */
1764         case FSF_LUN_ALREADY_OPEN:
1765                 break;
1766         case FSF_ACCESS_DENIED:
1767                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1768                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1769                 break;
1770         case FSF_PORT_BOXED:
1771                 zfcp_erp_set_port_status(zfcp_sdev->port,
1772                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1773                 zfcp_erp_port_reopen(zfcp_sdev->port,
1774                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1775                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1776                 break;
1777         case FSF_LUN_SHARING_VIOLATION:
1778                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1779                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1780                 break;
1781         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1782                 dev_warn(&adapter->ccw_device->dev,
1783                          "No handle is available for LUN "
1784                          "0x%016Lx on port 0x%016Lx\n",
1785                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1786                          (unsigned long long)zfcp_sdev->port->wwpn);
1787                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1788                 /* fall through */
1789         case FSF_INVALID_COMMAND_OPTION:
1790                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1791                 break;
1792         case FSF_ADAPTER_STATUS_AVAILABLE:
1793                 switch (header->fsf_status_qual.word[0]) {
1794                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1795                         zfcp_fc_test_link(zfcp_sdev->port);
1796                         /* fall through */
1797                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1798                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1799                         break;
1800                 }
1801                 break;
1802
1803         case FSF_GOOD:
1804                 zfcp_sdev->lun_handle = header->lun_handle;
1805                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1806                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1807                 break;
1808         }
1809 }
1810
1811 /**
1812  * zfcp_fsf_open_lun - open LUN
1813  * @erp_action: pointer to struct zfcp_erp_action
1814  * Returns: 0 on success, error otherwise
1815  */
1816 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1817 {
1818         struct zfcp_adapter *adapter = erp_action->adapter;
1819         struct zfcp_qdio *qdio = adapter->qdio;
1820         struct zfcp_fsf_req *req;
1821         int retval = -EIO;
1822
1823         spin_lock_irq(&qdio->req_q_lock);
1824         if (zfcp_qdio_sbal_get(qdio))
1825                 goto out;
1826
1827         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1828                                   SBAL_SFLAGS0_TYPE_READ,
1829                                   adapter->pool.erp_req);
1830
1831         if (IS_ERR(req)) {
1832                 retval = PTR_ERR(req);
1833                 goto out;
1834         }
1835
1836         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1837         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1838
1839         req->qtcb->header.port_handle = erp_action->port->handle;
1840         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1841         req->handler = zfcp_fsf_open_lun_handler;
1842         req->data = erp_action->sdev;
1843         req->erp_action = erp_action;
1844         erp_action->fsf_req_id = req->req_id;
1845
1846         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1847                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1848
1849         zfcp_fsf_start_erp_timer(req);
1850         retval = zfcp_fsf_req_send(req);
1851         if (retval) {
1852                 zfcp_fsf_req_free(req);
1853                 erp_action->fsf_req_id = 0;
1854         }
1855 out:
1856         spin_unlock_irq(&qdio->req_q_lock);
1857         return retval;
1858 }
1859
1860 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1861 {
1862         struct scsi_device *sdev = req->data;
1863         struct zfcp_scsi_dev *zfcp_sdev;
1864
1865         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1866                 return;
1867
1868         zfcp_sdev = sdev_to_zfcp(sdev);
1869
1870         switch (req->qtcb->header.fsf_status) {
1871         case FSF_PORT_HANDLE_NOT_VALID:
1872                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1873                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1874                 break;
1875         case FSF_LUN_HANDLE_NOT_VALID:
1876                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1877                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1878                 break;
1879         case FSF_PORT_BOXED:
1880                 zfcp_erp_set_port_status(zfcp_sdev->port,
1881                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1882                 zfcp_erp_port_reopen(zfcp_sdev->port,
1883                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1884                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1885                 break;
1886         case FSF_ADAPTER_STATUS_AVAILABLE:
1887                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1888                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1889                         zfcp_fc_test_link(zfcp_sdev->port);
1890                         /* fall through */
1891                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1892                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1893                         break;
1894                 }
1895                 break;
1896         case FSF_GOOD:
1897                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1898                 break;
1899         }
1900 }
1901
1902 /**
1903  * zfcp_fsf_close_LUN - close LUN
1904  * @erp_action: pointer to erp_action triggering the "close LUN"
1905  * Returns: 0 on success, error otherwise
1906  */
1907 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1908 {
1909         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1910         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1911         struct zfcp_fsf_req *req;
1912         int retval = -EIO;
1913
1914         spin_lock_irq(&qdio->req_q_lock);
1915         if (zfcp_qdio_sbal_get(qdio))
1916                 goto out;
1917
1918         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1919                                   SBAL_SFLAGS0_TYPE_READ,
1920                                   qdio->adapter->pool.erp_req);
1921
1922         if (IS_ERR(req)) {
1923                 retval = PTR_ERR(req);
1924                 goto out;
1925         }
1926
1927         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1928         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1929
1930         req->qtcb->header.port_handle = erp_action->port->handle;
1931         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1932         req->handler = zfcp_fsf_close_lun_handler;
1933         req->data = erp_action->sdev;
1934         req->erp_action = erp_action;
1935         erp_action->fsf_req_id = req->req_id;
1936
1937         zfcp_fsf_start_erp_timer(req);
1938         retval = zfcp_fsf_req_send(req);
1939         if (retval) {
1940                 zfcp_fsf_req_free(req);
1941                 erp_action->fsf_req_id = 0;
1942         }
1943 out:
1944         spin_unlock_irq(&qdio->req_q_lock);
1945         return retval;
1946 }
1947
1948 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1949 {
1950         lat_rec->sum += lat;
1951         lat_rec->min = min(lat_rec->min, lat);
1952         lat_rec->max = max(lat_rec->max, lat);
1953 }
1954
1955 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1956 {
1957         struct fsf_qual_latency_info *lat_in;
1958         struct latency_cont *lat = NULL;
1959         struct zfcp_scsi_dev *zfcp_sdev;
1960         struct zfcp_blk_drv_data blktrc;
1961         int ticks = req->adapter->timer_ticks;
1962
1963         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1964
1965         blktrc.flags = 0;
1966         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1967         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1968                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1969         blktrc.inb_usage = 0;
1970         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1971
1972         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1973             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1974                 zfcp_sdev = sdev_to_zfcp(scsi->device);
1975                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1976                 blktrc.channel_lat = lat_in->channel_lat * ticks;
1977                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1978
1979                 switch (req->qtcb->bottom.io.data_direction) {
1980                 case FSF_DATADIR_DIF_READ_STRIP:
1981                 case FSF_DATADIR_DIF_READ_CONVERT:
1982                 case FSF_DATADIR_READ:
1983                         lat = &zfcp_sdev->latencies.read;
1984                         break;
1985                 case FSF_DATADIR_DIF_WRITE_INSERT:
1986                 case FSF_DATADIR_DIF_WRITE_CONVERT:
1987                 case FSF_DATADIR_WRITE:
1988                         lat = &zfcp_sdev->latencies.write;
1989                         break;
1990                 case FSF_DATADIR_CMND:
1991                         lat = &zfcp_sdev->latencies.cmd;
1992                         break;
1993                 }
1994
1995                 if (lat) {
1996                         spin_lock(&zfcp_sdev->latencies.lock);
1997                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
1998                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
1999                         lat->counter++;
2000                         spin_unlock(&zfcp_sdev->latencies.lock);
2001                 }
2002         }
2003
2004         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2005                             sizeof(blktrc));
2006 }
2007
2008 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2009 {
2010         struct scsi_cmnd *scmnd = req->data;
2011         struct scsi_device *sdev = scmnd->device;
2012         struct zfcp_scsi_dev *zfcp_sdev;
2013         struct fsf_qtcb_header *header = &req->qtcb->header;
2014
2015         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2016                 return;
2017
2018         zfcp_sdev = sdev_to_zfcp(sdev);
2019
2020         switch (header->fsf_status) {
2021         case FSF_HANDLE_MISMATCH:
2022         case FSF_PORT_HANDLE_NOT_VALID:
2023                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2024                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2025                 break;
2026         case FSF_FCPLUN_NOT_VALID:
2027         case FSF_LUN_HANDLE_NOT_VALID:
2028                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2029                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2030                 break;
2031         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2032                 zfcp_fsf_class_not_supp(req);
2033                 break;
2034         case FSF_ACCESS_DENIED:
2035                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2036                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2037                 break;
2038         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2039                 dev_err(&req->adapter->ccw_device->dev,
2040                         "Incorrect direction %d, LUN 0x%016Lx on port "
2041                         "0x%016Lx closed\n",
2042                         req->qtcb->bottom.io.data_direction,
2043                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2044                         (unsigned long long)zfcp_sdev->port->wwpn);
2045                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2046                                           "fssfch3");
2047                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2048                 break;
2049         case FSF_CMND_LENGTH_NOT_VALID:
2050                 dev_err(&req->adapter->ccw_device->dev,
2051                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2052                         "port 0x%016Lx closed\n",
2053                         req->qtcb->bottom.io.fcp_cmnd_length,
2054                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2055                         (unsigned long long)zfcp_sdev->port->wwpn);
2056                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2057                                           "fssfch4");
2058                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2059                 break;
2060         case FSF_PORT_BOXED:
2061                 zfcp_erp_set_port_status(zfcp_sdev->port,
2062                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2063                 zfcp_erp_port_reopen(zfcp_sdev->port,
2064                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2065                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2066                 break;
2067         case FSF_LUN_BOXED:
2068                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2069                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2070                                     "fssfch6");
2071                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2072                 break;
2073         case FSF_ADAPTER_STATUS_AVAILABLE:
2074                 if (header->fsf_status_qual.word[0] ==
2075                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2076                         zfcp_fc_test_link(zfcp_sdev->port);
2077                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2078                 break;
2079         }
2080 }
2081
2082 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2083 {
2084         struct scsi_cmnd *scpnt;
2085         struct fcp_resp_with_ext *fcp_rsp;
2086         unsigned long flags;
2087
2088         read_lock_irqsave(&req->adapter->abort_lock, flags);
2089
2090         scpnt = req->data;
2091         if (unlikely(!scpnt)) {
2092                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2093                 return;
2094         }
2095
2096         zfcp_fsf_fcp_handler_common(req);
2097
2098         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2099                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2100                 goto skip_fsfstatus;
2101         }
2102
2103         switch (req->qtcb->header.fsf_status) {
2104         case FSF_INCONSISTENT_PROT_DATA:
2105         case FSF_INVALID_PROT_PARM:
2106                 set_host_byte(scpnt, DID_ERROR);
2107                 goto skip_fsfstatus;
2108         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2109                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2110                 goto skip_fsfstatus;
2111         case FSF_APP_TAG_CHECK_FAILURE:
2112                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2113                 goto skip_fsfstatus;
2114         case FSF_REF_TAG_CHECK_FAILURE:
2115                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2116                 goto skip_fsfstatus;
2117         }
2118         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2119         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2120
2121 skip_fsfstatus:
2122         zfcp_fsf_req_trace(req, scpnt);
2123         zfcp_dbf_scsi_result(scpnt, req);
2124
2125         scpnt->host_scribble = NULL;
2126         (scpnt->scsi_done) (scpnt);
2127         /*
2128          * We must hold this lock until scsi_done has been called.
2129          * Otherwise we may call scsi_done after abort regarding this
2130          * command has completed.
2131          * Note: scsi_done must not block!
2132          */
2133         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2134 }
2135
2136 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2137 {
2138         switch (scsi_get_prot_op(scsi_cmnd)) {
2139         case SCSI_PROT_NORMAL:
2140                 switch (scsi_cmnd->sc_data_direction) {
2141                 case DMA_NONE:
2142                         *data_dir = FSF_DATADIR_CMND;
2143                         break;
2144                 case DMA_FROM_DEVICE:
2145                         *data_dir = FSF_DATADIR_READ;
2146                         break;
2147                 case DMA_TO_DEVICE:
2148                         *data_dir = FSF_DATADIR_WRITE;
2149                         break;
2150                 case DMA_BIDIRECTIONAL:
2151                         return -EINVAL;
2152                 }
2153                 break;
2154
2155         case SCSI_PROT_READ_STRIP:
2156                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2157                 break;
2158         case SCSI_PROT_WRITE_INSERT:
2159                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2160                 break;
2161         case SCSI_PROT_READ_PASS:
2162                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2163                 break;
2164         case SCSI_PROT_WRITE_PASS:
2165                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2166                 break;
2167         default:
2168                 return -EINVAL;
2169         }
2170
2171         return 0;
2172 }
2173
2174 /**
2175  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2176  * @scsi_cmnd: scsi command to be sent
2177  */
2178 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2179 {
2180         struct zfcp_fsf_req *req;
2181         struct fcp_cmnd *fcp_cmnd;
2182         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2183         int retval = -EIO;
2184         struct scsi_device *sdev = scsi_cmnd->device;
2185         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2186         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2187         struct zfcp_qdio *qdio = adapter->qdio;
2188         struct fsf_qtcb_bottom_io *io;
2189         unsigned long flags;
2190
2191         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2192                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2193                 return -EBUSY;
2194
2195         spin_lock_irqsave(&qdio->req_q_lock, flags);
2196         if (atomic_read(&qdio->req_q_free) <= 0) {
2197                 atomic_inc(&qdio->req_q_full);
2198                 goto out;
2199         }
2200
2201         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2202                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2203
2204         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2205                                   sbtype, adapter->pool.scsi_req);
2206
2207         if (IS_ERR(req)) {
2208                 retval = PTR_ERR(req);
2209                 goto out;
2210         }
2211
2212         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2213
2214         io = &req->qtcb->bottom.io;
2215         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2216         req->data = scsi_cmnd;
2217         req->handler = zfcp_fsf_fcp_cmnd_handler;
2218         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2219         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2220         io->service_class = FSF_CLASS_3;
2221         io->fcp_cmnd_length = FCP_CMND_LEN;
2222
2223         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2224                 io->data_block_length = scsi_cmnd->device->sector_size;
2225                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2226         }
2227
2228         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2229                 goto failed_scsi_cmnd;
2230
2231         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2232         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2233
2234         if (scsi_prot_sg_count(scsi_cmnd)) {
2235                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2236                                        scsi_prot_sg_count(scsi_cmnd));
2237                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2238                                                  scsi_prot_sglist(scsi_cmnd));
2239                 if (retval)
2240                         goto failed_scsi_cmnd;
2241                 io->prot_data_length = zfcp_qdio_real_bytes(
2242                                                 scsi_prot_sglist(scsi_cmnd));
2243         }
2244
2245         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2246                                          scsi_sglist(scsi_cmnd));
2247         if (unlikely(retval))
2248                 goto failed_scsi_cmnd;
2249
2250         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2251         if (zfcp_adapter_multi_buffer_active(adapter))
2252                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2253
2254         retval = zfcp_fsf_req_send(req);
2255         if (unlikely(retval))
2256                 goto failed_scsi_cmnd;
2257
2258         goto out;
2259
2260 failed_scsi_cmnd:
2261         zfcp_fsf_req_free(req);
2262         scsi_cmnd->host_scribble = NULL;
2263 out:
2264         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2265         return retval;
2266 }
2267
2268 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2269 {
2270         struct fcp_resp_with_ext *fcp_rsp;
2271         struct fcp_resp_rsp_info *rsp_info;
2272
2273         zfcp_fsf_fcp_handler_common(req);
2274
2275         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2276         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2277
2278         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2279              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2280                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2281 }
2282
2283 /**
2284  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2285  * @scmnd: SCSI command to send the task management command for
2286  * @tm_flags: unsigned byte for task management flags
2287  * Returns: on success pointer to struct fsf_req, NULL otherwise
2288  */
2289 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2290                                             u8 tm_flags)
2291 {
2292         struct zfcp_fsf_req *req = NULL;
2293         struct fcp_cmnd *fcp_cmnd;
2294         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2295         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2296
2297         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2298                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2299                 return NULL;
2300
2301         spin_lock_irq(&qdio->req_q_lock);
2302         if (zfcp_qdio_sbal_get(qdio))
2303                 goto out;
2304
2305         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2306                                   SBAL_SFLAGS0_TYPE_WRITE,
2307                                   qdio->adapter->pool.scsi_req);
2308
2309         if (IS_ERR(req)) {
2310                 req = NULL;
2311                 goto out;
2312         }
2313
2314         req->data = scmnd;
2315         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2316         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2317         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2318         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2319         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2320         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2321
2322         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2323
2324         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2325         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2326
2327         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2328         if (!zfcp_fsf_req_send(req))
2329                 goto out;
2330
2331         zfcp_fsf_req_free(req);
2332         req = NULL;
2333 out:
2334         spin_unlock_irq(&qdio->req_q_lock);
2335         return req;
2336 }
2337
2338 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2339 {
2340 }
2341
2342 /**
2343  * zfcp_fsf_control_file - control file upload/download
2344  * @adapter: pointer to struct zfcp_adapter
2345  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2346  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2347  */
2348 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2349                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2350 {
2351         struct zfcp_qdio *qdio = adapter->qdio;
2352         struct zfcp_fsf_req *req = NULL;
2353         struct fsf_qtcb_bottom_support *bottom;
2354         int retval = -EIO;
2355         u8 direction;
2356
2357         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2358                 return ERR_PTR(-EOPNOTSUPP);
2359
2360         switch (fsf_cfdc->command) {
2361         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2362                 direction = SBAL_SFLAGS0_TYPE_WRITE;
2363                 break;
2364         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2365                 direction = SBAL_SFLAGS0_TYPE_READ;
2366                 break;
2367         default:
2368                 return ERR_PTR(-EINVAL);
2369         }
2370
2371         spin_lock_irq(&qdio->req_q_lock);
2372         if (zfcp_qdio_sbal_get(qdio))
2373                 goto out;
2374
2375         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2376         if (IS_ERR(req)) {
2377                 retval = -EPERM;
2378                 goto out;
2379         }
2380
2381         req->handler = zfcp_fsf_control_file_handler;
2382
2383         bottom = &req->qtcb->bottom.support;
2384         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2385         bottom->option = fsf_cfdc->option;
2386
2387         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2388
2389         if (retval ||
2390                 (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
2391                 zfcp_fsf_req_free(req);
2392                 retval = -EIO;
2393                 goto out;
2394         }
2395         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2396         if (zfcp_adapter_multi_buffer_active(adapter))
2397                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2398
2399         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2400         retval = zfcp_fsf_req_send(req);
2401 out:
2402         spin_unlock_irq(&qdio->req_q_lock);
2403
2404         if (!retval) {
2405                 wait_for_completion(&req->completion);
2406                 return req;
2407         }
2408         return ERR_PTR(retval);
2409 }
2410
2411 /**
2412  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2413  * @adapter: pointer to struct zfcp_adapter
2414  * @sbal_idx: response queue index of SBAL to be processed
2415  */
2416 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2417 {
2418         struct zfcp_adapter *adapter = qdio->adapter;
2419         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2420         struct qdio_buffer_element *sbale;
2421         struct zfcp_fsf_req *fsf_req;
2422         unsigned long req_id;
2423         int idx;
2424
2425         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2426
2427                 sbale = &sbal->element[idx];
2428                 req_id = (unsigned long) sbale->addr;
2429                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2430
2431                 if (!fsf_req) {
2432                         /*
2433                          * Unknown request means that we have potentially memory
2434                          * corruption and must stop the machine immediately.
2435                          */
2436                         zfcp_qdio_siosl(adapter);
2437                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2438                               req_id, dev_name(&adapter->ccw_device->dev));
2439                 }
2440
2441                 fsf_req->qdio_req.sbal_response = sbal_idx;
2442                 zfcp_fsf_req_complete(fsf_req);
2443
2444                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2445                         break;
2446         }
2447 }
2448
2449 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2450                                       struct qdio_buffer *sbal)
2451 {
2452         struct qdio_buffer_element *sbale = &sbal->element[0];
2453         u64 req_id = (unsigned long) sbale->addr;
2454
2455         return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2456 }