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_2", 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 = sdev_to_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         switch (req->qtcb->header.fsf_status) {
 781         case FSF_PORT_HANDLE_NOT_VALID:
 782                 if (fsq->word[0] == fsq->word[1]) {
 783                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 784                                                 "fsafch1");
 785                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 786                 }
 787                 break;
 788         case FSF_LUN_HANDLE_NOT_VALID:
 789                 if (fsq->word[0] == fsq->word[1]) {
 790                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 791                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 792                 }
 793                 break;
 794         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 795                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 796                 break;
 797         case FSF_PORT_BOXED:
 798                 zfcp_erp_set_port_status(zfcp_sdev->port,
 799                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 800                 zfcp_erp_port_reopen(zfcp_sdev->port,
 801                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 802                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 803                 break;
 804         case FSF_LUN_BOXED:
 805                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 806                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 807                                     "fsafch4");
 808                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 809                 break;
 810         case FSF_ADAPTER_STATUS_AVAILABLE:
 811                 switch (fsq->word[0]) {
 812                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 813                         zfcp_fc_test_link(zfcp_sdev->port);
 814                         /* fall through */
 815                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 816                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 817                         break;
 818                 }
 819                 break;
 820         case FSF_GOOD:
 821                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 822                 break;
 823         }
 824 }
 825
 826 /**
 827  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 828  * @scmnd: The SCSI command to abort
 829  * Returns: pointer to struct zfcp_fsf_req
 830  */
 831
 832 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 833 {
 834         struct zfcp_fsf_req *req = NULL;
 835         struct scsi_device *sdev = scmnd->device;
 836         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 837         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 838         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 839
 840         spin_lock_irq(&qdio->req_q_lock);
 841         if (zfcp_qdio_sbal_get(qdio))
 842                 goto out;
 843         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 844                                   SBAL_SFLAGS0_TYPE_READ,
 845                                   qdio->adapter->pool.scsi_abort);
 846         if (IS_ERR(req)) {
 847                 req = NULL;
 848                 goto out;
 849         }
 850
 851         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 852                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 853                 goto out_error_free;
 854
 855         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 856
 857         req->data = sdev;
 858         req->handler = zfcp_fsf_abort_fcp_command_handler;
 859         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 860         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 861         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 862
 863         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 864         if (!zfcp_fsf_req_send(req))
 865                 goto out;
 866
 867 out_error_free:
 868         zfcp_fsf_req_free(req);
 869         req = NULL;
 870 out:
 871         spin_unlock_irq(&qdio->req_q_lock);
 872         return req;
 873 }
 874
 875 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 876 {
 877         struct zfcp_adapter *adapter = req->adapter;
 878         struct zfcp_fsf_ct_els *ct = req->data;
 879         struct fsf_qtcb_header *header = &req->qtcb->header;
 880
 881         ct->status = -EINVAL;
 882
 883         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 884                 goto skip_fsfstatus;
 885
 886         switch (header->fsf_status) {
 887         case FSF_GOOD:
 888                 zfcp_dbf_san_res("fsscth1", req);
 889                 ct->status = 0;
 890                 break;
 891         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 892                 zfcp_fsf_class_not_supp(req);
 893                 break;
 894         case FSF_ADAPTER_STATUS_AVAILABLE:
 895                 switch (header->fsf_status_qual.word[0]){
 896                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 897                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 898                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 899                         break;
 900                 }
 901                 break;
 902         case FSF_ACCESS_DENIED:
 903                 break;
 904         case FSF_PORT_BOXED:
 905                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 906                 break;
 907         case FSF_PORT_HANDLE_NOT_VALID:
 908                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 909                 /* fall through */
 910         case FSF_GENERIC_COMMAND_REJECTED:
 911         case FSF_PAYLOAD_SIZE_MISMATCH:
 912         case FSF_REQUEST_SIZE_TOO_LARGE:
 913         case FSF_RESPONSE_SIZE_TOO_LARGE:
 914         case FSF_SBAL_MISMATCH:
 915                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 916                 break;
 917         }
 918
 919 skip_fsfstatus:
 920         if (ct->handler)
 921                 ct->handler(ct->handler_data);
 922 }
 923
 924 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 925                                             struct zfcp_qdio_req *q_req,
 926                                             struct scatterlist *sg_req,
 927                                             struct scatterlist *sg_resp)
 928 {
 929         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 930         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 931         zfcp_qdio_set_sbale_last(qdio, q_req);
 932 }
 933
 934 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 935                                        struct scatterlist *sg_req,
 936                                        struct scatterlist *sg_resp)
 937 {
 938         struct zfcp_adapter *adapter = req->adapter;
 939         struct zfcp_qdio *qdio = adapter->qdio;
 940         struct fsf_qtcb *qtcb = req->qtcb;
 941         u32 feat = adapter->adapter_features;
 942
 943         if (zfcp_adapter_multi_buffer_active(adapter)) {
 944                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 945                         return -EIO;
 946                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 947                         return -EIO;
 948
 949                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
 950                                         zfcp_qdio_sbale_count(sg_req));
 951                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 952                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
 953                 return 0;
 954         }
 955
 956         /* use single, unchained SBAL if it can hold the request */
 957         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 958                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
 959                                                 sg_req, sg_resp);
 960                 return 0;
 961         }
 962
 963         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
 964                 return -EOPNOTSUPP;
 965
 966         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 967                 return -EIO;
 968
 969         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
 970
 971         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 972         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
 973
 974         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 975                 return -EIO;
 976
 977         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
 978
 979         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 980
 981         return 0;
 982 }
 983
 984 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
 985                                  struct scatterlist *sg_req,
 986                                  struct scatterlist *sg_resp,
 987                                  unsigned int timeout)
 988 {
 989         int ret;
 990
 991         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
 992         if (ret)
 993                 return ret;
 994
 995         /* common settings for ct/gs and els requests */
 996         if (timeout > 255)
 997                 timeout = 255; /* max value accepted by hardware */
 998         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
 999         req->qtcb->bottom.support.timeout = timeout;
1000         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1001
1002         return 0;
1003 }
1004
1005 /**
1006  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1007  * @ct: pointer to struct zfcp_send_ct with data for request
1008  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1009  */
1010 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1011                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1012                      unsigned int timeout)
1013 {
1014         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1015         struct zfcp_fsf_req *req;
1016         int ret = -EIO;
1017
1018         spin_lock_irq(&qdio->req_q_lock);
1019         if (zfcp_qdio_sbal_get(qdio))
1020                 goto out;
1021
1022         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1023                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1024
1025         if (IS_ERR(req)) {
1026                 ret = PTR_ERR(req);
1027                 goto out;
1028         }
1029
1030         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1031         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1032         if (ret)
1033                 goto failed_send;
1034
1035         req->handler = zfcp_fsf_send_ct_handler;
1036         req->qtcb->header.port_handle = wka_port->handle;
1037         req->data = ct;
1038
1039         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1040
1041         ret = zfcp_fsf_req_send(req);
1042         if (ret)
1043                 goto failed_send;
1044
1045         goto out;
1046
1047 failed_send:
1048         zfcp_fsf_req_free(req);
1049 out:
1050         spin_unlock_irq(&qdio->req_q_lock);
1051         return ret;
1052 }
1053
1054 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1055 {
1056         struct zfcp_fsf_ct_els *send_els = req->data;
1057         struct zfcp_port *port = send_els->port;
1058         struct fsf_qtcb_header *header = &req->qtcb->header;
1059
1060         send_els->status = -EINVAL;
1061
1062         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1063                 goto skip_fsfstatus;
1064
1065         switch (header->fsf_status) {
1066         case FSF_GOOD:
1067                 zfcp_dbf_san_res("fsselh1", req);
1068                 send_els->status = 0;
1069                 break;
1070         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1071                 zfcp_fsf_class_not_supp(req);
1072                 break;
1073         case FSF_ADAPTER_STATUS_AVAILABLE:
1074                 switch (header->fsf_status_qual.word[0]){
1075                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1076                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1077                 case FSF_SQ_RETRY_IF_POSSIBLE:
1078                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1079                         break;
1080                 }
1081                 break;
1082         case FSF_ELS_COMMAND_REJECTED:
1083         case FSF_PAYLOAD_SIZE_MISMATCH:
1084         case FSF_REQUEST_SIZE_TOO_LARGE:
1085         case FSF_RESPONSE_SIZE_TOO_LARGE:
1086                 break;
1087         case FSF_ACCESS_DENIED:
1088                 if (port) {
1089                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1090                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1091                 }
1092                 break;
1093         case FSF_SBAL_MISMATCH:
1094                 /* should never occur, avoided in zfcp_fsf_send_els */
1095                 /* fall through */
1096         default:
1097                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1098                 break;
1099         }
1100 skip_fsfstatus:
1101         if (send_els->handler)
1102                 send_els->handler(send_els->handler_data);
1103 }
1104
1105 /**
1106  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1107  * @els: pointer to struct zfcp_send_els with data for the command
1108  */
1109 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1110                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1111 {
1112         struct zfcp_fsf_req *req;
1113         struct zfcp_qdio *qdio = adapter->qdio;
1114         int ret = -EIO;
1115
1116         spin_lock_irq(&qdio->req_q_lock);
1117         if (zfcp_qdio_sbal_get(qdio))
1118                 goto out;
1119
1120         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1121                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1122
1123         if (IS_ERR(req)) {
1124                 ret = PTR_ERR(req);
1125                 goto out;
1126         }
1127
1128         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1129
1130         if (!zfcp_adapter_multi_buffer_active(adapter))
1131                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1132
1133         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1134
1135         if (ret)
1136                 goto failed_send;
1137
1138         hton24(req->qtcb->bottom.support.d_id, d_id);
1139         req->handler = zfcp_fsf_send_els_handler;
1140         req->data = els;
1141
1142         zfcp_dbf_san_req("fssels1", req, d_id);
1143
1144         ret = zfcp_fsf_req_send(req);
1145         if (ret)
1146                 goto failed_send;
1147
1148         goto out;
1149
1150 failed_send:
1151         zfcp_fsf_req_free(req);
1152 out:
1153         spin_unlock_irq(&qdio->req_q_lock);
1154         return ret;
1155 }
1156
1157 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1158 {
1159         struct zfcp_fsf_req *req;
1160         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1161         int retval = -EIO;
1162
1163         spin_lock_irq(&qdio->req_q_lock);
1164         if (zfcp_qdio_sbal_get(qdio))
1165                 goto out;
1166
1167         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1168                                   SBAL_SFLAGS0_TYPE_READ,
1169                                   qdio->adapter->pool.erp_req);
1170
1171         if (IS_ERR(req)) {
1172                 retval = PTR_ERR(req);
1173                 goto out;
1174         }
1175
1176         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1177         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1178
1179         req->qtcb->bottom.config.feature_selection =
1180                         FSF_FEATURE_CFDC |
1181                         FSF_FEATURE_LUN_SHARING |
1182                         FSF_FEATURE_NOTIFICATION_LOST |
1183                         FSF_FEATURE_UPDATE_ALERT;
1184         req->erp_action = erp_action;
1185         req->handler = zfcp_fsf_exchange_config_data_handler;
1186         erp_action->fsf_req_id = req->req_id;
1187
1188         zfcp_fsf_start_erp_timer(req);
1189         retval = zfcp_fsf_req_send(req);
1190         if (retval) {
1191                 zfcp_fsf_req_free(req);
1192                 erp_action->fsf_req_id = 0;
1193         }
1194 out:
1195         spin_unlock_irq(&qdio->req_q_lock);
1196         return retval;
1197 }
1198
1199 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1200                                        struct fsf_qtcb_bottom_config *data)
1201 {
1202         struct zfcp_fsf_req *req = NULL;
1203         int retval = -EIO;
1204
1205         spin_lock_irq(&qdio->req_q_lock);
1206         if (zfcp_qdio_sbal_get(qdio))
1207                 goto out_unlock;
1208
1209         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1210                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1211
1212         if (IS_ERR(req)) {
1213                 retval = PTR_ERR(req);
1214                 goto out_unlock;
1215         }
1216
1217         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1218         req->handler = zfcp_fsf_exchange_config_data_handler;
1219
1220         req->qtcb->bottom.config.feature_selection =
1221                         FSF_FEATURE_CFDC |
1222                         FSF_FEATURE_LUN_SHARING |
1223                         FSF_FEATURE_NOTIFICATION_LOST |
1224                         FSF_FEATURE_UPDATE_ALERT;
1225
1226         if (data)
1227                 req->data = data;
1228
1229         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1230         retval = zfcp_fsf_req_send(req);
1231         spin_unlock_irq(&qdio->req_q_lock);
1232         if (!retval)
1233                 wait_for_completion(&req->completion);
1234
1235         zfcp_fsf_req_free(req);
1236         return retval;
1237
1238 out_unlock:
1239         spin_unlock_irq(&qdio->req_q_lock);
1240         return retval;
1241 }
1242
1243 /**
1244  * zfcp_fsf_exchange_port_data - request information about local port
1245  * @erp_action: ERP action for the adapter for which port data is requested
1246  * Returns: 0 on success, error otherwise
1247  */
1248 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1249 {
1250         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1251         struct zfcp_fsf_req *req;
1252         int retval = -EIO;
1253
1254         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1255                 return -EOPNOTSUPP;
1256
1257         spin_lock_irq(&qdio->req_q_lock);
1258         if (zfcp_qdio_sbal_get(qdio))
1259                 goto out;
1260
1261         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1262                                   SBAL_SFLAGS0_TYPE_READ,
1263                                   qdio->adapter->pool.erp_req);
1264
1265         if (IS_ERR(req)) {
1266                 retval = PTR_ERR(req);
1267                 goto out;
1268         }
1269
1270         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1271         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1272
1273         req->handler = zfcp_fsf_exchange_port_data_handler;
1274         req->erp_action = erp_action;
1275         erp_action->fsf_req_id = req->req_id;
1276
1277         zfcp_fsf_start_erp_timer(req);
1278         retval = zfcp_fsf_req_send(req);
1279         if (retval) {
1280                 zfcp_fsf_req_free(req);
1281                 erp_action->fsf_req_id = 0;
1282         }
1283 out:
1284         spin_unlock_irq(&qdio->req_q_lock);
1285         return retval;
1286 }
1287
1288 /**
1289  * zfcp_fsf_exchange_port_data_sync - request information about local port
1290  * @qdio: pointer to struct zfcp_qdio
1291  * @data: pointer to struct fsf_qtcb_bottom_port
1292  * Returns: 0 on success, error otherwise
1293  */
1294 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1295                                      struct fsf_qtcb_bottom_port *data)
1296 {
1297         struct zfcp_fsf_req *req = NULL;
1298         int retval = -EIO;
1299
1300         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1301                 return -EOPNOTSUPP;
1302
1303         spin_lock_irq(&qdio->req_q_lock);
1304         if (zfcp_qdio_sbal_get(qdio))
1305                 goto out_unlock;
1306
1307         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1308                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1309
1310         if (IS_ERR(req)) {
1311                 retval = PTR_ERR(req);
1312                 goto out_unlock;
1313         }
1314
1315         if (data)
1316                 req->data = data;
1317
1318         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1319
1320         req->handler = zfcp_fsf_exchange_port_data_handler;
1321         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1322         retval = zfcp_fsf_req_send(req);
1323         spin_unlock_irq(&qdio->req_q_lock);
1324
1325         if (!retval)
1326                 wait_for_completion(&req->completion);
1327
1328         zfcp_fsf_req_free(req);
1329
1330         return retval;
1331
1332 out_unlock:
1333         spin_unlock_irq(&qdio->req_q_lock);
1334         return retval;
1335 }
1336
1337 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1338 {
1339         struct zfcp_port *port = req->data;
1340         struct fsf_qtcb_header *header = &req->qtcb->header;
1341         struct fc_els_flogi *plogi;
1342
1343         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1344                 goto out;
1345
1346         switch (header->fsf_status) {
1347         case FSF_PORT_ALREADY_OPEN:
1348                 break;
1349         case FSF_ACCESS_DENIED:
1350                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1351                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1352                 break;
1353         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1354                 dev_warn(&req->adapter->ccw_device->dev,
1355                          "Not enough FCP adapter resources to open "
1356                          "remote port 0x%016Lx\n",
1357                          (unsigned long long)port->wwpn);
1358                 zfcp_erp_set_port_status(port,
1359                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1360                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1361                 break;
1362         case FSF_ADAPTER_STATUS_AVAILABLE:
1363                 switch (header->fsf_status_qual.word[0]) {
1364                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1365                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1366                 case FSF_SQ_NO_RETRY_POSSIBLE:
1367                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1368                         break;
1369                 }
1370                 break;
1371         case FSF_GOOD:
1372                 port->handle = header->port_handle;
1373                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1374                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1375                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1376                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1377                                   &port->status);
1378                 /* check whether D_ID has changed during open */
1379                 /*
1380                  * FIXME: This check is not airtight, as the FCP channel does
1381                  * not monitor closures of target port connections caused on
1382                  * the remote side. Thus, they might miss out on invalidating
1383                  * locally cached WWPNs (and other N_Port parameters) of gone
1384                  * target ports. So, our heroic attempt to make things safe
1385                  * could be undermined by 'open port' response data tagged with
1386                  * obsolete WWPNs. Another reason to monitor potential
1387                  * connection closures ourself at least (by interpreting
1388                  * incoming ELS' and unsolicited status). It just crosses my
1389                  * mind that one should be able to cross-check by means of
1390                  * another GID_PN straight after a port has been opened.
1391                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1392                  */
1393                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1394                 if (req->qtcb->bottom.support.els1_length >=
1395                     FSF_PLOGI_MIN_LEN)
1396                                 zfcp_fc_plogi_evaluate(port, plogi);
1397                 break;
1398         case FSF_UNKNOWN_OP_SUBTYPE:
1399                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1400                 break;
1401         }
1402
1403 out:
1404         put_device(&port->dev);
1405 }
1406
1407 /**
1408  * zfcp_fsf_open_port - create and send open port request
1409  * @erp_action: pointer to struct zfcp_erp_action
1410  * Returns: 0 on success, error otherwise
1411  */
1412 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1413 {
1414         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1415         struct zfcp_port *port = erp_action->port;
1416         struct zfcp_fsf_req *req;
1417         int retval = -EIO;
1418
1419         spin_lock_irq(&qdio->req_q_lock);
1420         if (zfcp_qdio_sbal_get(qdio))
1421                 goto out;
1422
1423         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1424                                   SBAL_SFLAGS0_TYPE_READ,
1425                                   qdio->adapter->pool.erp_req);
1426
1427         if (IS_ERR(req)) {
1428                 retval = PTR_ERR(req);
1429                 goto out;
1430         }
1431
1432         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1433         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1434
1435         req->handler = zfcp_fsf_open_port_handler;
1436         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1437         req->data = port;
1438         req->erp_action = erp_action;
1439         erp_action->fsf_req_id = req->req_id;
1440         get_device(&port->dev);
1441
1442         zfcp_fsf_start_erp_timer(req);
1443         retval = zfcp_fsf_req_send(req);
1444         if (retval) {
1445                 zfcp_fsf_req_free(req);
1446                 erp_action->fsf_req_id = 0;
1447                 put_device(&port->dev);
1448         }
1449 out:
1450         spin_unlock_irq(&qdio->req_q_lock);
1451         return retval;
1452 }
1453
1454 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1455 {
1456         struct zfcp_port *port = req->data;
1457
1458         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1459                 return;
1460
1461         switch (req->qtcb->header.fsf_status) {
1462         case FSF_PORT_HANDLE_NOT_VALID:
1463                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1464                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1465                 break;
1466         case FSF_ADAPTER_STATUS_AVAILABLE:
1467                 break;
1468         case FSF_GOOD:
1469                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1470                 break;
1471         }
1472 }
1473
1474 /**
1475  * zfcp_fsf_close_port - create and send close port request
1476  * @erp_action: pointer to struct zfcp_erp_action
1477  * Returns: 0 on success, error otherwise
1478  */
1479 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1480 {
1481         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1482         struct zfcp_fsf_req *req;
1483         int retval = -EIO;
1484
1485         spin_lock_irq(&qdio->req_q_lock);
1486         if (zfcp_qdio_sbal_get(qdio))
1487                 goto out;
1488
1489         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1490                                   SBAL_SFLAGS0_TYPE_READ,
1491                                   qdio->adapter->pool.erp_req);
1492
1493         if (IS_ERR(req)) {
1494                 retval = PTR_ERR(req);
1495                 goto out;
1496         }
1497
1498         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1499         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1500
1501         req->handler = zfcp_fsf_close_port_handler;
1502         req->data = erp_action->port;
1503         req->erp_action = erp_action;
1504         req->qtcb->header.port_handle = erp_action->port->handle;
1505         erp_action->fsf_req_id = req->req_id;
1506
1507         zfcp_fsf_start_erp_timer(req);
1508         retval = zfcp_fsf_req_send(req);
1509         if (retval) {
1510                 zfcp_fsf_req_free(req);
1511                 erp_action->fsf_req_id = 0;
1512         }
1513 out:
1514         spin_unlock_irq(&qdio->req_q_lock);
1515         return retval;
1516 }
1517
1518 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1519 {
1520         struct zfcp_fc_wka_port *wka_port = req->data;
1521         struct fsf_qtcb_header *header = &req->qtcb->header;
1522
1523         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1524                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1525                 goto out;
1526         }
1527
1528         switch (header->fsf_status) {
1529         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1530                 dev_warn(&req->adapter->ccw_device->dev,
1531                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1532                 /* fall through */
1533         case FSF_ADAPTER_STATUS_AVAILABLE:
1534                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1535                 /* fall through */
1536         case FSF_ACCESS_DENIED:
1537                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1538                 break;
1539         case FSF_GOOD:
1540                 wka_port->handle = header->port_handle;
1541                 /* fall through */
1542         case FSF_PORT_ALREADY_OPEN:
1543                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1544         }
1545 out:
1546         wake_up(&wka_port->completion_wq);
1547 }
1548
1549 /**
1550  * zfcp_fsf_open_wka_port - create and send open wka-port request
1551  * @wka_port: pointer to struct zfcp_fc_wka_port
1552  * Returns: 0 on success, error otherwise
1553  */
1554 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1555 {
1556         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1557         struct zfcp_fsf_req *req;
1558         int retval = -EIO;
1559
1560         spin_lock_irq(&qdio->req_q_lock);
1561         if (zfcp_qdio_sbal_get(qdio))
1562                 goto out;
1563
1564         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1565                                   SBAL_SFLAGS0_TYPE_READ,
1566                                   qdio->adapter->pool.erp_req);
1567
1568         if (IS_ERR(req)) {
1569                 retval = PTR_ERR(req);
1570                 goto out;
1571         }
1572
1573         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1574         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1575
1576         req->handler = zfcp_fsf_open_wka_port_handler;
1577         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1578         req->data = wka_port;
1579
1580         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1581         retval = zfcp_fsf_req_send(req);
1582         if (retval)
1583                 zfcp_fsf_req_free(req);
1584 out:
1585         spin_unlock_irq(&qdio->req_q_lock);
1586         return retval;
1587 }
1588
1589 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1590 {
1591         struct zfcp_fc_wka_port *wka_port = req->data;
1592
1593         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1594                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1595                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1596         }
1597
1598         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1599         wake_up(&wka_port->completion_wq);
1600 }
1601
1602 /**
1603  * zfcp_fsf_close_wka_port - create and send close wka port request
1604  * @wka_port: WKA port to open
1605  * Returns: 0 on success, error otherwise
1606  */
1607 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1608 {
1609         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1610         struct zfcp_fsf_req *req;
1611         int retval = -EIO;
1612
1613         spin_lock_irq(&qdio->req_q_lock);
1614         if (zfcp_qdio_sbal_get(qdio))
1615                 goto out;
1616
1617         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1618                                   SBAL_SFLAGS0_TYPE_READ,
1619                                   qdio->adapter->pool.erp_req);
1620
1621         if (IS_ERR(req)) {
1622                 retval = PTR_ERR(req);
1623                 goto out;
1624         }
1625
1626         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1627         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1628
1629         req->handler = zfcp_fsf_close_wka_port_handler;
1630         req->data = wka_port;
1631         req->qtcb->header.port_handle = wka_port->handle;
1632
1633         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1634         retval = zfcp_fsf_req_send(req);
1635         if (retval)
1636                 zfcp_fsf_req_free(req);
1637 out:
1638         spin_unlock_irq(&qdio->req_q_lock);
1639         return retval;
1640 }
1641
1642 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1643 {
1644         struct zfcp_port *port = req->data;
1645         struct fsf_qtcb_header *header = &req->qtcb->header;
1646         struct scsi_device *sdev;
1647
1648         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1649                 return;
1650
1651         switch (header->fsf_status) {
1652         case FSF_PORT_HANDLE_NOT_VALID:
1653                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1654                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1655                 break;
1656         case FSF_ACCESS_DENIED:
1657                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1658                 break;
1659         case FSF_PORT_BOXED:
1660                 /* can't use generic zfcp_erp_modify_port_status because
1661                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1662                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1663                 shost_for_each_device(sdev, port->adapter->scsi_host)
1664                         if (sdev_to_zfcp(sdev)->port == port)
1665                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1666                                                   &sdev_to_zfcp(sdev)->status);
1667                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1668                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1669                                      "fscpph2");
1670                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1671                 break;
1672         case FSF_ADAPTER_STATUS_AVAILABLE:
1673                 switch (header->fsf_status_qual.word[0]) {
1674                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1675                         /* fall through */
1676                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1677                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1678                         break;
1679                 }
1680                 break;
1681         case FSF_GOOD:
1682                 /* can't use generic zfcp_erp_modify_port_status because
1683                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1684                  */
1685                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1686                 shost_for_each_device(sdev, port->adapter->scsi_host)
1687                         if (sdev_to_zfcp(sdev)->port == port)
1688                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1689                                                   &sdev_to_zfcp(sdev)->status);
1690                 break;
1691         }
1692 }
1693
1694 /**
1695  * zfcp_fsf_close_physical_port - close physical port
1696  * @erp_action: pointer to struct zfcp_erp_action
1697  * Returns: 0 on success
1698  */
1699 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1700 {
1701         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1702         struct zfcp_fsf_req *req;
1703         int retval = -EIO;
1704
1705         spin_lock_irq(&qdio->req_q_lock);
1706         if (zfcp_qdio_sbal_get(qdio))
1707                 goto out;
1708
1709         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1710                                   SBAL_SFLAGS0_TYPE_READ,
1711                                   qdio->adapter->pool.erp_req);
1712
1713         if (IS_ERR(req)) {
1714                 retval = PTR_ERR(req);
1715                 goto out;
1716         }
1717
1718         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1719         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1720
1721         req->data = erp_action->port;
1722         req->qtcb->header.port_handle = erp_action->port->handle;
1723         req->erp_action = erp_action;
1724         req->handler = zfcp_fsf_close_physical_port_handler;
1725         erp_action->fsf_req_id = req->req_id;
1726
1727         zfcp_fsf_start_erp_timer(req);
1728         retval = zfcp_fsf_req_send(req);
1729         if (retval) {
1730                 zfcp_fsf_req_free(req);
1731                 erp_action->fsf_req_id = 0;
1732         }
1733 out:
1734         spin_unlock_irq(&qdio->req_q_lock);
1735         return retval;
1736 }
1737
1738 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1739 {
1740         struct zfcp_adapter *adapter = req->adapter;
1741         struct scsi_device *sdev = req->data;
1742         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1743         struct fsf_qtcb_header *header = &req->qtcb->header;
1744         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1745
1746         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1747                 return;
1748
1749         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1750                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1751                           ZFCP_STATUS_LUN_SHARED |
1752                           ZFCP_STATUS_LUN_READONLY,
1753                           &zfcp_sdev->status);
1754
1755         switch (header->fsf_status) {
1756
1757         case FSF_PORT_HANDLE_NOT_VALID:
1758                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1759                 /* fall through */
1760         case FSF_LUN_ALREADY_OPEN:
1761                 break;
1762         case FSF_ACCESS_DENIED:
1763                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1764                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1765                 break;
1766         case FSF_PORT_BOXED:
1767                 zfcp_erp_set_port_status(zfcp_sdev->port,
1768                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1769                 zfcp_erp_port_reopen(zfcp_sdev->port,
1770                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1771                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1772                 break;
1773         case FSF_LUN_SHARING_VIOLATION:
1774                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1775                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1776                 break;
1777         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1778                 dev_warn(&adapter->ccw_device->dev,
1779                          "No handle is available for LUN "
1780                          "0x%016Lx on port 0x%016Lx\n",
1781                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1782                          (unsigned long long)zfcp_sdev->port->wwpn);
1783                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1784                 /* fall through */
1785         case FSF_INVALID_COMMAND_OPTION:
1786                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1787                 break;
1788         case FSF_ADAPTER_STATUS_AVAILABLE:
1789                 switch (header->fsf_status_qual.word[0]) {
1790                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1791                         zfcp_fc_test_link(zfcp_sdev->port);
1792                         /* fall through */
1793                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1794                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1795                         break;
1796                 }
1797                 break;
1798
1799         case FSF_GOOD:
1800                 zfcp_sdev->lun_handle = header->lun_handle;
1801                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1802                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1803                 break;
1804         }
1805 }
1806
1807 /**
1808  * zfcp_fsf_open_lun - open LUN
1809  * @erp_action: pointer to struct zfcp_erp_action
1810  * Returns: 0 on success, error otherwise
1811  */
1812 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1813 {
1814         struct zfcp_adapter *adapter = erp_action->adapter;
1815         struct zfcp_qdio *qdio = adapter->qdio;
1816         struct zfcp_fsf_req *req;
1817         int retval = -EIO;
1818
1819         spin_lock_irq(&qdio->req_q_lock);
1820         if (zfcp_qdio_sbal_get(qdio))
1821                 goto out;
1822
1823         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1824                                   SBAL_SFLAGS0_TYPE_READ,
1825                                   adapter->pool.erp_req);
1826
1827         if (IS_ERR(req)) {
1828                 retval = PTR_ERR(req);
1829                 goto out;
1830         }
1831
1832         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1833         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1834
1835         req->qtcb->header.port_handle = erp_action->port->handle;
1836         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1837         req->handler = zfcp_fsf_open_lun_handler;
1838         req->data = erp_action->sdev;
1839         req->erp_action = erp_action;
1840         erp_action->fsf_req_id = req->req_id;
1841
1842         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1843                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1844
1845         zfcp_fsf_start_erp_timer(req);
1846         retval = zfcp_fsf_req_send(req);
1847         if (retval) {
1848                 zfcp_fsf_req_free(req);
1849                 erp_action->fsf_req_id = 0;
1850         }
1851 out:
1852         spin_unlock_irq(&qdio->req_q_lock);
1853         return retval;
1854 }
1855
1856 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1857 {
1858         struct scsi_device *sdev = req->data;
1859         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1860
1861         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1862                 return;
1863
1864         switch (req->qtcb->header.fsf_status) {
1865         case FSF_PORT_HANDLE_NOT_VALID:
1866                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1867                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1868                 break;
1869         case FSF_LUN_HANDLE_NOT_VALID:
1870                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1871                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1872                 break;
1873         case FSF_PORT_BOXED:
1874                 zfcp_erp_set_port_status(zfcp_sdev->port,
1875                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1876                 zfcp_erp_port_reopen(zfcp_sdev->port,
1877                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1878                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1879                 break;
1880         case FSF_ADAPTER_STATUS_AVAILABLE:
1881                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1882                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1883                         zfcp_fc_test_link(zfcp_sdev->port);
1884                         /* fall through */
1885                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1886                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1887                         break;
1888                 }
1889                 break;
1890         case FSF_GOOD:
1891                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1892                 break;
1893         }
1894 }
1895
1896 /**
1897  * zfcp_fsf_close_LUN - close LUN
1898  * @erp_action: pointer to erp_action triggering the "close LUN"
1899  * Returns: 0 on success, error otherwise
1900  */
1901 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1902 {
1903         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1904         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1905         struct zfcp_fsf_req *req;
1906         int retval = -EIO;
1907
1908         spin_lock_irq(&qdio->req_q_lock);
1909         if (zfcp_qdio_sbal_get(qdio))
1910                 goto out;
1911
1912         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1913                                   SBAL_SFLAGS0_TYPE_READ,
1914                                   qdio->adapter->pool.erp_req);
1915
1916         if (IS_ERR(req)) {
1917                 retval = PTR_ERR(req);
1918                 goto out;
1919         }
1920
1921         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1922         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1923
1924         req->qtcb->header.port_handle = erp_action->port->handle;
1925         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1926         req->handler = zfcp_fsf_close_lun_handler;
1927         req->data = erp_action->sdev;
1928         req->erp_action = erp_action;
1929         erp_action->fsf_req_id = req->req_id;
1930
1931         zfcp_fsf_start_erp_timer(req);
1932         retval = zfcp_fsf_req_send(req);
1933         if (retval) {
1934                 zfcp_fsf_req_free(req);
1935                 erp_action->fsf_req_id = 0;
1936         }
1937 out:
1938         spin_unlock_irq(&qdio->req_q_lock);
1939         return retval;
1940 }
1941
1942 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1943 {
1944         lat_rec->sum += lat;
1945         lat_rec->min = min(lat_rec->min, lat);
1946         lat_rec->max = max(lat_rec->max, lat);
1947 }
1948
1949 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1950 {
1951         struct fsf_qual_latency_info *lat_in;
1952         struct latency_cont *lat = NULL;
1953         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scsi->device);
1954         struct zfcp_blk_drv_data blktrc;
1955         int ticks = req->adapter->timer_ticks;
1956
1957         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1958
1959         blktrc.flags = 0;
1960         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1961         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1962                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1963         blktrc.inb_usage = 0;
1964         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
1965
1966         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
1967             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
1968                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
1969                 blktrc.channel_lat = lat_in->channel_lat * ticks;
1970                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
1971
1972                 switch (req->qtcb->bottom.io.data_direction) {
1973                 case FSF_DATADIR_DIF_READ_STRIP:
1974                 case FSF_DATADIR_DIF_READ_CONVERT:
1975                 case FSF_DATADIR_READ:
1976                         lat = &zfcp_sdev->latencies.read;
1977                         break;
1978                 case FSF_DATADIR_DIF_WRITE_INSERT:
1979                 case FSF_DATADIR_DIF_WRITE_CONVERT:
1980                 case FSF_DATADIR_WRITE:
1981                         lat = &zfcp_sdev->latencies.write;
1982                         break;
1983                 case FSF_DATADIR_CMND:
1984                         lat = &zfcp_sdev->latencies.cmd;
1985                         break;
1986                 }
1987
1988                 if (lat) {
1989                         spin_lock(&zfcp_sdev->latencies.lock);
1990                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
1991                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
1992                         lat->counter++;
1993                         spin_unlock(&zfcp_sdev->latencies.lock);
1994                 }
1995         }
1996
1997         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
1998                             sizeof(blktrc));
1999 }
2000
2001 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2002 {
2003         struct scsi_cmnd *scmnd = req->data;
2004         struct scsi_device *sdev = scmnd->device;
2005         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2006         struct fsf_qtcb_header *header = &req->qtcb->header;
2007
2008         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2009                 return;
2010
2011         switch (header->fsf_status) {
2012         case FSF_HANDLE_MISMATCH:
2013         case FSF_PORT_HANDLE_NOT_VALID:
2014                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2015                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2016                 break;
2017         case FSF_FCPLUN_NOT_VALID:
2018         case FSF_LUN_HANDLE_NOT_VALID:
2019                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2020                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2021                 break;
2022         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2023                 zfcp_fsf_class_not_supp(req);
2024                 break;
2025         case FSF_ACCESS_DENIED:
2026                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2027                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2028                 break;
2029         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2030                 dev_err(&req->adapter->ccw_device->dev,
2031                         "Incorrect direction %d, LUN 0x%016Lx on port "
2032                         "0x%016Lx closed\n",
2033                         req->qtcb->bottom.io.data_direction,
2034                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2035                         (unsigned long long)zfcp_sdev->port->wwpn);
2036                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2037                                           "fssfch3");
2038                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2039                 break;
2040         case FSF_CMND_LENGTH_NOT_VALID:
2041                 dev_err(&req->adapter->ccw_device->dev,
2042                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2043                         "port 0x%016Lx closed\n",
2044                         req->qtcb->bottom.io.fcp_cmnd_length,
2045                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2046                         (unsigned long long)zfcp_sdev->port->wwpn);
2047                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2048                                           "fssfch4");
2049                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2050                 break;
2051         case FSF_PORT_BOXED:
2052                 zfcp_erp_set_port_status(zfcp_sdev->port,
2053                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2054                 zfcp_erp_port_reopen(zfcp_sdev->port,
2055                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2056                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2057                 break;
2058         case FSF_LUN_BOXED:
2059                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2060                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2061                                     "fssfch6");
2062                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2063                 break;
2064         case FSF_ADAPTER_STATUS_AVAILABLE:
2065                 if (header->fsf_status_qual.word[0] ==
2066                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2067                         zfcp_fc_test_link(zfcp_sdev->port);
2068                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2069                 break;
2070         }
2071 }
2072
2073 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2074 {
2075         struct scsi_cmnd *scpnt;
2076         struct fcp_resp_with_ext *fcp_rsp;
2077         unsigned long flags;
2078
2079         read_lock_irqsave(&req->adapter->abort_lock, flags);
2080
2081         scpnt = req->data;
2082         if (unlikely(!scpnt)) {
2083                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2084                 return;
2085         }
2086
2087         zfcp_fsf_fcp_handler_common(req);
2088
2089         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2090                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2091                 goto skip_fsfstatus;
2092         }
2093
2094         switch (req->qtcb->header.fsf_status) {
2095         case FSF_INCONSISTENT_PROT_DATA:
2096         case FSF_INVALID_PROT_PARM:
2097                 set_host_byte(scpnt, DID_ERROR);
2098                 goto skip_fsfstatus;
2099         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2100                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2101                 goto skip_fsfstatus;
2102         case FSF_APP_TAG_CHECK_FAILURE:
2103                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2104                 goto skip_fsfstatus;
2105         case FSF_REF_TAG_CHECK_FAILURE:
2106                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2107                 goto skip_fsfstatus;
2108         }
2109         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2110         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2111
2112 skip_fsfstatus:
2113         zfcp_fsf_req_trace(req, scpnt);
2114         zfcp_dbf_scsi_result(scpnt, req);
2115
2116         scpnt->host_scribble = NULL;
2117         (scpnt->scsi_done) (scpnt);
2118         /*
2119          * We must hold this lock until scsi_done has been called.
2120          * Otherwise we may call scsi_done after abort regarding this
2121          * command has completed.
2122          * Note: scsi_done must not block!
2123          */
2124         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2125 }
2126
2127 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2128 {
2129         switch (scsi_get_prot_op(scsi_cmnd)) {
2130         case SCSI_PROT_NORMAL:
2131                 switch (scsi_cmnd->sc_data_direction) {
2132                 case DMA_NONE:
2133                         *data_dir = FSF_DATADIR_CMND;
2134                         break;
2135                 case DMA_FROM_DEVICE:
2136                         *data_dir = FSF_DATADIR_READ;
2137                         break;
2138                 case DMA_TO_DEVICE:
2139                         *data_dir = FSF_DATADIR_WRITE;
2140                         break;
2141                 case DMA_BIDIRECTIONAL:
2142                         return -EINVAL;
2143                 }
2144                 break;
2145
2146         case SCSI_PROT_READ_STRIP:
2147                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2148                 break;
2149         case SCSI_PROT_WRITE_INSERT:
2150                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2151                 break;
2152         case SCSI_PROT_READ_PASS:
2153                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2154                 break;
2155         case SCSI_PROT_WRITE_PASS:
2156                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2157                 break;
2158         default:
2159                 return -EINVAL;
2160         }
2161
2162         return 0;
2163 }
2164
2165 /**
2166  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2167  * @scsi_cmnd: scsi command to be sent
2168  */
2169 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2170 {
2171         struct zfcp_fsf_req *req;
2172         struct fcp_cmnd *fcp_cmnd;
2173         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2174         int retval = -EIO;
2175         struct scsi_device *sdev = scsi_cmnd->device;
2176         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2177         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2178         struct zfcp_qdio *qdio = adapter->qdio;
2179         struct fsf_qtcb_bottom_io *io;
2180         unsigned long flags;
2181
2182         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2183                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2184                 return -EBUSY;
2185
2186         spin_lock_irqsave(&qdio->req_q_lock, flags);
2187         if (atomic_read(&qdio->req_q_free) <= 0) {
2188                 atomic_inc(&qdio->req_q_full);
2189                 goto out;
2190         }
2191
2192         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2193                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2194
2195         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2196                                   sbtype, adapter->pool.scsi_req);
2197
2198         if (IS_ERR(req)) {
2199                 retval = PTR_ERR(req);
2200                 goto out;
2201         }
2202
2203         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2204
2205         io = &req->qtcb->bottom.io;
2206         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2207         req->data = scsi_cmnd;
2208         req->handler = zfcp_fsf_fcp_cmnd_handler;
2209         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2210         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2211         io->service_class = FSF_CLASS_3;
2212         io->fcp_cmnd_length = FCP_CMND_LEN;
2213
2214         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2215                 io->data_block_length = scsi_cmnd->device->sector_size;
2216                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2217         }
2218
2219         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2220                 goto failed_scsi_cmnd;
2221
2222         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2223         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2224
2225         if (scsi_prot_sg_count(scsi_cmnd)) {
2226                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2227                                        scsi_prot_sg_count(scsi_cmnd));
2228                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2229                                                  scsi_prot_sglist(scsi_cmnd));
2230                 if (retval)
2231                         goto failed_scsi_cmnd;
2232                 io->prot_data_length = zfcp_qdio_real_bytes(
2233                                                 scsi_prot_sglist(scsi_cmnd));
2234         }
2235
2236         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2237                                          scsi_sglist(scsi_cmnd));
2238         if (unlikely(retval))
2239                 goto failed_scsi_cmnd;
2240
2241         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2242         if (zfcp_adapter_multi_buffer_active(adapter))
2243                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2244
2245         retval = zfcp_fsf_req_send(req);
2246         if (unlikely(retval))
2247                 goto failed_scsi_cmnd;
2248
2249         goto out;
2250
2251 failed_scsi_cmnd:
2252         zfcp_fsf_req_free(req);
2253         scsi_cmnd->host_scribble = NULL;
2254 out:
2255         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2256         return retval;
2257 }
2258
2259 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2260 {
2261         struct fcp_resp_with_ext *fcp_rsp;
2262         struct fcp_resp_rsp_info *rsp_info;
2263
2264         zfcp_fsf_fcp_handler_common(req);
2265
2266         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2267         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2268
2269         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2270              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2271                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2272 }
2273
2274 /**
2275  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2276  * @scmnd: SCSI command to send the task management command for
2277  * @tm_flags: unsigned byte for task management flags
2278  * Returns: on success pointer to struct fsf_req, NULL otherwise
2279  */
2280 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2281                                             u8 tm_flags)
2282 {
2283         struct zfcp_fsf_req *req = NULL;
2284         struct fcp_cmnd *fcp_cmnd;
2285         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2286         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2287
2288         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2289                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2290                 return NULL;
2291
2292         spin_lock_irq(&qdio->req_q_lock);
2293         if (zfcp_qdio_sbal_get(qdio))
2294                 goto out;
2295
2296         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2297                                   SBAL_SFLAGS0_TYPE_WRITE,
2298                                   qdio->adapter->pool.scsi_req);
2299
2300         if (IS_ERR(req)) {
2301                 req = NULL;
2302                 goto out;
2303         }
2304
2305         req->data = scmnd;
2306         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2307         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2308         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2309         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2310         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2311         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2312
2313         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2314
2315         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2316         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2317
2318         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2319         if (!zfcp_fsf_req_send(req))
2320                 goto out;
2321
2322         zfcp_fsf_req_free(req);
2323         req = NULL;
2324 out:
2325         spin_unlock_irq(&qdio->req_q_lock);
2326         return req;
2327 }
2328
2329 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2330 {
2331 }
2332
2333 /**
2334  * zfcp_fsf_control_file - control file upload/download
2335  * @adapter: pointer to struct zfcp_adapter
2336  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2337  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2338  */
2339 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2340                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2341 {
2342         struct zfcp_qdio *qdio = adapter->qdio;
2343         struct zfcp_fsf_req *req = NULL;
2344         struct fsf_qtcb_bottom_support *bottom;
2345         int retval = -EIO;
2346         u8 direction;
2347
2348         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2349                 return ERR_PTR(-EOPNOTSUPP);
2350
2351         switch (fsf_cfdc->command) {
2352         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2353                 direction = SBAL_SFLAGS0_TYPE_WRITE;
2354                 break;
2355         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2356                 direction = SBAL_SFLAGS0_TYPE_READ;
2357                 break;
2358         default:
2359                 return ERR_PTR(-EINVAL);
2360         }
2361
2362         spin_lock_irq(&qdio->req_q_lock);
2363         if (zfcp_qdio_sbal_get(qdio))
2364                 goto out;
2365
2366         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2367         if (IS_ERR(req)) {
2368                 retval = -EPERM;
2369                 goto out;
2370         }
2371
2372         req->handler = zfcp_fsf_control_file_handler;
2373
2374         bottom = &req->qtcb->bottom.support;
2375         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2376         bottom->option = fsf_cfdc->option;
2377
2378         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2379
2380         if (retval ||
2381                 (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
2382                 zfcp_fsf_req_free(req);
2383                 retval = -EIO;
2384                 goto out;
2385         }
2386         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2387         if (zfcp_adapter_multi_buffer_active(adapter))
2388                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2389
2390         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2391         retval = zfcp_fsf_req_send(req);
2392 out:
2393         spin_unlock_irq(&qdio->req_q_lock);
2394
2395         if (!retval) {
2396                 wait_for_completion(&req->completion);
2397                 return req;
2398         }
2399         return ERR_PTR(retval);
2400 }
2401
2402 /**
2403  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2404  * @adapter: pointer to struct zfcp_adapter
2405  * @sbal_idx: response queue index of SBAL to be processed
2406  */
2407 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2408 {
2409         struct zfcp_adapter *adapter = qdio->adapter;
2410         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2411         struct qdio_buffer_element *sbale;
2412         struct zfcp_fsf_req *fsf_req;
2413         unsigned long req_id;
2414         int idx;
2415
2416         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2417
2418                 sbale = &sbal->element[idx];
2419                 req_id = (unsigned long) sbale->addr;
2420                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2421
2422                 if (!fsf_req) {
2423                         /*
2424                          * Unknown request means that we have potentially memory
2425                          * corruption and must stop the machine immediately.
2426                          */
2427                         zfcp_qdio_siosl(adapter);
2428                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2429                               req_id, dev_name(&adapter->ccw_device->dev));
2430                 }
2431
2432                 fsf_req->qdio_req.sbal_response = sbal_idx;
2433                 zfcp_fsf_req_complete(fsf_req);
2434
2435                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2436                         break;
2437         }
2438 }
2439
2440 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2441                                       struct qdio_buffer *sbal)
2442 {
2443         struct qdio_buffer_element *sbale = &sbal->element[0];
2444         u64 req_id = (unsigned long) sbale->addr;
2445
2446         return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2447 }