Pileus Git - ~andy/linux/blob - drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corp. 2002, 2010
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <linux/slab.h>
  14 #include <scsi/fc/fc_els.h>
  15 #include "zfcp_ext.h"
  16 #include "zfcp_fc.h"
  17 #include "zfcp_dbf.h"
  18 #include "zfcp_qdio.h"
  19 #include "zfcp_reqlist.h"
  20
  21 struct kmem_cache *zfcp_fsf_qtcb_cache;
  22
  23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  24 {
  25         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  26         zfcp_qdio_siosl(adapter);
  27         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  28                                 "fsrth_1");
  29 }
  30
  31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  32                                  unsigned long timeout)
  33 {
  34         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  35         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  36         fsf_req->timer.expires = jiffies + timeout;
  37         add_timer(&fsf_req->timer);
  38 }
  39
  40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  41 {
  42         BUG_ON(!fsf_req->erp_action);
  43         fsf_req->timer.function = zfcp_erp_timeout_handler;
  44         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  45         fsf_req->timer.expires = jiffies + 30 * HZ;
  46         add_timer(&fsf_req->timer);
  47 }
  48
  49 /* association between FSF command and FSF QTCB type */
  50 static u32 fsf_qtcb_type[] = {
  51         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  52         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  56         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  61         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  62         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  63         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  64 };
  65
  66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  67 {
  68         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  69                 "operational because of an unsupported FC class\n");
  70         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  71         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  72 }
  73
  74 /**
  75  * zfcp_fsf_req_free - free memory used by fsf request
  76  * @fsf_req: pointer to struct zfcp_fsf_req
  77  */
  78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  79 {
  80         if (likely(req->pool)) {
  81                 if (likely(req->qtcb))
  82                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  83                 mempool_free(req, req->pool);
  84                 return;
  85         }
  86
  87         if (likely(req->qtcb))
  88                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  89         kfree(req);
  90 }
  91
  92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  93 {
  94         unsigned long flags;
  95         struct fsf_status_read_buffer *sr_buf = req->data;
  96         struct zfcp_adapter *adapter = req->adapter;
  97         struct zfcp_port *port;
  98         int d_id = ntoh24(sr_buf->d_id);
  99
 100         read_lock_irqsave(&adapter->port_list_lock, flags);
 101         list_for_each_entry(port, &adapter->port_list, list)
 102                 if (port->d_id == d_id) {
 103                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 104                         break;
 105                 }
 106         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 107 }
 108
 109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 110                                          struct fsf_link_down_info *link_down)
 111 {
 112         struct zfcp_adapter *adapter = req->adapter;
 113
 114         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 115                 return;
 116
 117         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 118
 119         zfcp_scsi_schedule_rports_block(adapter);
 120
 121         if (!link_down)
 122                 goto out;
 123
 124         switch (link_down->error_code) {
 125         case FSF_PSQ_LINK_NO_LIGHT:
 126                 dev_warn(&req->adapter->ccw_device->dev,
 127                          "There is no light signal from the local "
 128                          "fibre channel cable\n");
 129                 break;
 130         case FSF_PSQ_LINK_WRAP_PLUG:
 131                 dev_warn(&req->adapter->ccw_device->dev,
 132                          "There is a wrap plug instead of a fibre "
 133                          "channel cable\n");
 134                 break;
 135         case FSF_PSQ_LINK_NO_FCP:
 136                 dev_warn(&req->adapter->ccw_device->dev,
 137                          "The adjacent fibre channel node does not "
 138                          "support FCP\n");
 139                 break;
 140         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 141                 dev_warn(&req->adapter->ccw_device->dev,
 142                          "The FCP device is suspended because of a "
 143                          "firmware update\n");
 144                 break;
 145         case FSF_PSQ_LINK_INVALID_WWPN:
 146                 dev_warn(&req->adapter->ccw_device->dev,
 147                          "The FCP device detected a WWPN that is "
 148                          "duplicate or not valid\n");
 149                 break;
 150         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 151                 dev_warn(&req->adapter->ccw_device->dev,
 152                          "The fibre channel fabric does not support NPIV\n");
 153                 break;
 154         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 155                 dev_warn(&req->adapter->ccw_device->dev,
 156                          "The FCP adapter cannot support more NPIV ports\n");
 157                 break;
 158         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 159                 dev_warn(&req->adapter->ccw_device->dev,
 160                          "The adjacent switch cannot support "
 161                          "more NPIV ports\n");
 162                 break;
 163         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "The FCP adapter could not log in to the "
 166                          "fibre channel fabric\n");
 167                 break;
 168         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The WWPN assignment file on the FCP adapter "
 171                          "has been damaged\n");
 172                 break;
 173         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The mode table on the FCP adapter "
 176                          "has been damaged\n");
 177                 break;
 178         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "All NPIV ports on the FCP adapter have "
 181                          "been assigned\n");
 182                 break;
 183         default:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "The link between the FCP adapter and "
 186                          "the FC fabric is down\n");
 187         }
 188 out:
 189         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 190 }
 191
 192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 193 {
 194         struct fsf_status_read_buffer *sr_buf = req->data;
 195         struct fsf_link_down_info *ldi =
 196                 (struct fsf_link_down_info *) &sr_buf->payload;
 197
 198         switch (sr_buf->status_subtype) {
 199         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 200                 zfcp_fsf_link_down_info_eval(req, ldi);
 201                 break;
 202         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 203                 zfcp_fsf_link_down_info_eval(req, ldi);
 204                 break;
 205         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 206                 zfcp_fsf_link_down_info_eval(req, NULL);
 207         };
 208 }
 209
 210 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 211 {
 212         struct zfcp_adapter *adapter = req->adapter;
 213         struct fsf_status_read_buffer *sr_buf = req->data;
 214
 215         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 216                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 217                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 218                 zfcp_fsf_req_free(req);
 219                 return;
 220         }
 221
 222         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 223
 224         switch (sr_buf->status_type) {
 225         case FSF_STATUS_READ_PORT_CLOSED:
 226                 zfcp_fsf_status_read_port_closed(req);
 227                 break;
 228         case FSF_STATUS_READ_INCOMING_ELS:
 229                 zfcp_fc_incoming_els(req);
 230                 break;
 231         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 232                 break;
 233         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 234                 dev_warn(&adapter->ccw_device->dev,
 235                          "The error threshold for checksum statistics "
 236                          "has been exceeded\n");
 237                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 238                 break;
 239         case FSF_STATUS_READ_LINK_DOWN:
 240                 zfcp_fsf_status_read_link_down(req);
 241                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 242                 break;
 243         case FSF_STATUS_READ_LINK_UP:
 244                 dev_info(&adapter->ccw_device->dev,
 245                          "The local link has been restored\n");
 246                 /* All ports should be marked as ready to run again */
 247                 zfcp_erp_set_adapter_status(adapter,
 248                                             ZFCP_STATUS_COMMON_RUNNING);
 249                 zfcp_erp_adapter_reopen(adapter,
 250                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 251                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 252                                         "fssrh_2");
 253                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 254
 255                 break;
 256         case FSF_STATUS_READ_NOTIFICATION_LOST:
 257                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
 258                         zfcp_cfdc_adapter_access_changed(adapter);
 259                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 260                         zfcp_fc_conditional_port_scan(adapter);
 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 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 441 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 442 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 443 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 444 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 445 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 446 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 447
 448 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 449 {
 450         u32 fdmi_speed = 0;
 451         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 452                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 453         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 454                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 455         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 456                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 457         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 458                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 459         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 460                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 461         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 462                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 463         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 464                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 465         return fdmi_speed;
 466 }
 467
 468 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 469 {
 470         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 471         struct zfcp_adapter *adapter = req->adapter;
 472         struct Scsi_Host *shost = adapter->scsi_host;
 473         struct fc_els_flogi *nsp, *plogi;
 474
 475         /* adjust pointers for missing command code */
 476         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 477                                         - sizeof(u32));
 478         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 479                                         - sizeof(u32));
 480
 481         if (req->data)
 482                 memcpy(req->data, bottom, sizeof(*bottom));
 483
 484         fc_host_port_name(shost) = nsp->fl_wwpn;
 485         fc_host_node_name(shost) = nsp->fl_wwnn;
 486         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 487         fc_host_speed(shost) =
 488                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
 489         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 490
 491         adapter->hydra_version = bottom->adapter_type;
 492         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 493         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 494                                          (u16)FSF_STATUS_READS_RECOM);
 495
 496         if (fc_host_permanent_port_name(shost) == -1)
 497                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 498
 499         switch (bottom->fc_topology) {
 500         case FSF_TOPO_P2P:
 501                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 502                 adapter->peer_wwpn = plogi->fl_wwpn;
 503                 adapter->peer_wwnn = plogi->fl_wwnn;
 504                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 505                 break;
 506         case FSF_TOPO_FABRIC:
 507                 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 508                 break;
 509         case FSF_TOPO_AL:
 510                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 511                 /* fall through */
 512         default:
 513                 dev_err(&adapter->ccw_device->dev,
 514                         "Unknown or unsupported arbitrated loop "
 515                         "fibre channel topology detected\n");
 516                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 517                 return -EIO;
 518         }
 519
 520         zfcp_scsi_set_prot(adapter);
 521
 522         return 0;
 523 }
 524
 525 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 526 {
 527         struct zfcp_adapter *adapter = req->adapter;
 528         struct fsf_qtcb *qtcb = req->qtcb;
 529         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 530         struct Scsi_Host *shost = adapter->scsi_host;
 531
 532         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 533                 return;
 534
 535         adapter->fsf_lic_version = bottom->lic_version;
 536         adapter->adapter_features = bottom->adapter_features;
 537         adapter->connection_features = bottom->connection_features;
 538         adapter->peer_wwpn = 0;
 539         adapter->peer_wwnn = 0;
 540         adapter->peer_d_id = 0;
 541
 542         switch (qtcb->header.fsf_status) {
 543         case FSF_GOOD:
 544                 if (zfcp_fsf_exchange_config_evaluate(req))
 545                         return;
 546
 547                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 548                         dev_err(&adapter->ccw_device->dev,
 549                                 "FCP adapter maximum QTCB size (%d bytes) "
 550                                 "is too small\n",
 551                                 bottom->max_qtcb_size);
 552                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 553                         return;
 554                 }
 555                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 556                                 &adapter->status);
 557                 break;
 558         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 559                 fc_host_node_name(shost) = 0;
 560                 fc_host_port_name(shost) = 0;
 561                 fc_host_port_id(shost) = 0;
 562                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 563                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 564                 adapter->hydra_version = 0;
 565
 566                 zfcp_fsf_link_down_info_eval(req,
 567                         &qtcb->header.fsf_status_qual.link_down_info);
 568                 break;
 569         default:
 570                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 571                 return;
 572         }
 573
 574         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 575                 adapter->hardware_version = bottom->hardware_version;
 576                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 577                        min(FC_SERIAL_NUMBER_SIZE, 17));
 578                 EBCASC(fc_host_serial_number(shost),
 579                        min(FC_SERIAL_NUMBER_SIZE, 17));
 580         }
 581
 582         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 583                 dev_err(&adapter->ccw_device->dev,
 584                         "The FCP adapter only supports newer "
 585                         "control block versions\n");
 586                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 587                 return;
 588         }
 589         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 590                 dev_err(&adapter->ccw_device->dev,
 591                         "The FCP adapter only supports older "
 592                         "control block versions\n");
 593                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 594         }
 595 }
 596
 597 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 598 {
 599         struct zfcp_adapter *adapter = req->adapter;
 600         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 601         struct Scsi_Host *shost = adapter->scsi_host;
 602
 603         if (req->data)
 604                 memcpy(req->data, bottom, sizeof(*bottom));
 605
 606         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 607                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 608                 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 609         } else
 610                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 611         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 612         fc_host_supported_speeds(shost) =
 613                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
 614         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 615                FC_FC4_LIST_SIZE);
 616         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 617                FC_FC4_LIST_SIZE);
 618 }
 619
 620 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 621 {
 622         struct fsf_qtcb *qtcb = req->qtcb;
 623
 624         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 625                 return;
 626
 627         switch (qtcb->header.fsf_status) {
 628         case FSF_GOOD:
 629                 zfcp_fsf_exchange_port_evaluate(req);
 630                 break;
 631         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 632                 zfcp_fsf_exchange_port_evaluate(req);
 633                 zfcp_fsf_link_down_info_eval(req,
 634                         &qtcb->header.fsf_status_qual.link_down_info);
 635                 break;
 636         }
 637 }
 638
 639 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 640 {
 641         struct zfcp_fsf_req *req;
 642
 643         if (likely(pool))
 644                 req = mempool_alloc(pool, GFP_ATOMIC);
 645         else
 646                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 647
 648         if (unlikely(!req))
 649                 return NULL;
 650
 651         memset(req, 0, sizeof(*req));
 652         req->pool = pool;
 653         return req;
 654 }
 655
 656 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 657 {
 658         struct fsf_qtcb *qtcb;
 659
 660         if (likely(pool))
 661                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 662         else
 663                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 664
 665         if (unlikely(!qtcb))
 666                 return NULL;
 667
 668         memset(qtcb, 0, sizeof(*qtcb));
 669         return qtcb;
 670 }
 671
 672 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 673                                                 u32 fsf_cmd, u8 sbtype,
 674                                                 mempool_t *pool)
 675 {
 676         struct zfcp_adapter *adapter = qdio->adapter;
 677         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 678
 679         if (unlikely(!req))
 680                 return ERR_PTR(-ENOMEM);
 681
 682         if (adapter->req_no == 0)
 683                 adapter->req_no++;
 684
 685         INIT_LIST_HEAD(&req->list);
 686         init_timer(&req->timer);
 687         init_completion(&req->completion);
 688
 689         req->adapter = adapter;
 690         req->fsf_command = fsf_cmd;
 691         req->req_id = adapter->req_no;
 692
 693         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 694                 if (likely(pool))
 695                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 696                 else
 697                         req->qtcb = zfcp_qtcb_alloc(NULL);
 698
 699                 if (unlikely(!req->qtcb)) {
 700                         zfcp_fsf_req_free(req);
 701                         return ERR_PTR(-ENOMEM);
 702                 }
 703
 704                 req->seq_no = adapter->fsf_req_seq_no;
 705                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 706                 req->qtcb->prefix.req_id = req->req_id;
 707                 req->qtcb->prefix.ulp_info = 26;
 708                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 709                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 710                 req->qtcb->header.req_handle = req->req_id;
 711                 req->qtcb->header.fsf_command = req->fsf_command;
 712         }
 713
 714         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 715                            req->qtcb, sizeof(struct fsf_qtcb));
 716
 717         return req;
 718 }
 719
 720 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 721 {
 722         struct zfcp_adapter *adapter = req->adapter;
 723         struct zfcp_qdio *qdio = adapter->qdio;
 724         int with_qtcb = (req->qtcb != NULL);
 725         int req_id = req->req_id;
 726
 727         zfcp_reqlist_add(adapter->req_list, req);
 728
 729         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 730         req->issued = get_clock();
 731         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 732                 del_timer(&req->timer);
 733                 /* lookup request again, list might have changed */
 734                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 735                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 736                 return -EIO;
 737         }
 738
 739         /* Don't increase for unsolicited status */
 740         if (with_qtcb)
 741                 adapter->fsf_req_seq_no++;
 742         adapter->req_no++;
 743
 744         return 0;
 745 }
 746
 747 /**
 748  * zfcp_fsf_status_read - send status read request
 749  * @adapter: pointer to struct zfcp_adapter
 750  * @req_flags: request flags
 751  * Returns: 0 on success, ERROR otherwise
 752  */
 753 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 754 {
 755         struct zfcp_adapter *adapter = qdio->adapter;
 756         struct zfcp_fsf_req *req;
 757         struct fsf_status_read_buffer *sr_buf;
 758         struct page *page;
 759         int retval = -EIO;
 760
 761         spin_lock_irq(&qdio->req_q_lock);
 762         if (zfcp_qdio_sbal_get(qdio))
 763                 goto out;
 764
 765         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0,
 766                                   adapter->pool.status_read_req);
 767         if (IS_ERR(req)) {
 768                 retval = PTR_ERR(req);
 769                 goto out;
 770         }
 771
 772         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 773         if (!page) {
 774                 retval = -ENOMEM;
 775                 goto failed_buf;
 776         }
 777         sr_buf = page_address(page);
 778         memset(sr_buf, 0, sizeof(*sr_buf));
 779         req->data = sr_buf;
 780
 781         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 782         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 783
 784         retval = zfcp_fsf_req_send(req);
 785         if (retval)
 786                 goto failed_req_send;
 787
 788         goto out;
 789
 790 failed_req_send:
 791         req->data = NULL;
 792         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 793 failed_buf:
 794         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 795         zfcp_fsf_req_free(req);
 796 out:
 797         spin_unlock_irq(&qdio->req_q_lock);
 798         return retval;
 799 }
 800
 801 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 802 {
 803         struct scsi_device *sdev = req->data;
 804         struct zfcp_scsi_dev *zfcp_sdev;
 805         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 806
 807         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 808                 return;
 809
 810         zfcp_sdev = sdev_to_zfcp(sdev);
 811
 812         switch (req->qtcb->header.fsf_status) {
 813         case FSF_PORT_HANDLE_NOT_VALID:
 814                 if (fsq->word[0] == fsq->word[1]) {
 815                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 816                                                 "fsafch1");
 817                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 818                 }
 819                 break;
 820         case FSF_LUN_HANDLE_NOT_VALID:
 821                 if (fsq->word[0] == fsq->word[1]) {
 822                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 823                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 824                 }
 825                 break;
 826         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 827                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 828                 break;
 829         case FSF_PORT_BOXED:
 830                 zfcp_erp_set_port_status(zfcp_sdev->port,
 831                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 832                 zfcp_erp_port_reopen(zfcp_sdev->port,
 833                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 834                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 835                 break;
 836         case FSF_LUN_BOXED:
 837                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 838                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 839                                     "fsafch4");
 840                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 841                 break;
 842         case FSF_ADAPTER_STATUS_AVAILABLE:
 843                 switch (fsq->word[0]) {
 844                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 845                         zfcp_fc_test_link(zfcp_sdev->port);
 846                         /* fall through */
 847                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 848                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 849                         break;
 850                 }
 851                 break;
 852         case FSF_GOOD:
 853                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 854                 break;
 855         }
 856 }
 857
 858 /**
 859  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 860  * @scmnd: The SCSI command to abort
 861  * Returns: pointer to struct zfcp_fsf_req
 862  */
 863
 864 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 865 {
 866         struct zfcp_fsf_req *req = NULL;
 867         struct scsi_device *sdev = scmnd->device;
 868         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 869         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 870         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 871
 872         spin_lock_irq(&qdio->req_q_lock);
 873         if (zfcp_qdio_sbal_get(qdio))
 874                 goto out;
 875         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 876                                   SBAL_SFLAGS0_TYPE_READ,
 877                                   qdio->adapter->pool.scsi_abort);
 878         if (IS_ERR(req)) {
 879                 req = NULL;
 880                 goto out;
 881         }
 882
 883         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 884                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 885                 goto out_error_free;
 886
 887         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 888
 889         req->data = sdev;
 890         req->handler = zfcp_fsf_abort_fcp_command_handler;
 891         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 892         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 893         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 894
 895         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 896         if (!zfcp_fsf_req_send(req))
 897                 goto out;
 898
 899 out_error_free:
 900         zfcp_fsf_req_free(req);
 901         req = NULL;
 902 out:
 903         spin_unlock_irq(&qdio->req_q_lock);
 904         return req;
 905 }
 906
 907 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 908 {
 909         struct zfcp_adapter *adapter = req->adapter;
 910         struct zfcp_fsf_ct_els *ct = req->data;
 911         struct fsf_qtcb_header *header = &req->qtcb->header;
 912
 913         ct->status = -EINVAL;
 914
 915         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 916                 goto skip_fsfstatus;
 917
 918         switch (header->fsf_status) {
 919         case FSF_GOOD:
 920                 zfcp_dbf_san_res("fsscth2", req);
 921                 ct->status = 0;
 922                 break;
 923         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 924                 zfcp_fsf_class_not_supp(req);
 925                 break;
 926         case FSF_ADAPTER_STATUS_AVAILABLE:
 927                 switch (header->fsf_status_qual.word[0]){
 928                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 929                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 930                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 931                         break;
 932                 }
 933                 break;
 934         case FSF_ACCESS_DENIED:
 935                 break;
 936         case FSF_PORT_BOXED:
 937                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 938                 break;
 939         case FSF_PORT_HANDLE_NOT_VALID:
 940                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 941                 /* fall through */
 942         case FSF_GENERIC_COMMAND_REJECTED:
 943         case FSF_PAYLOAD_SIZE_MISMATCH:
 944         case FSF_REQUEST_SIZE_TOO_LARGE:
 945         case FSF_RESPONSE_SIZE_TOO_LARGE:
 946         case FSF_SBAL_MISMATCH:
 947                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 948                 break;
 949         }
 950
 951 skip_fsfstatus:
 952         if (ct->handler)
 953                 ct->handler(ct->handler_data);
 954 }
 955
 956 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 957                                             struct zfcp_qdio_req *q_req,
 958                                             struct scatterlist *sg_req,
 959                                             struct scatterlist *sg_resp)
 960 {
 961         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 962         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 963         zfcp_qdio_set_sbale_last(qdio, q_req);
 964 }
 965
 966 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 967                                        struct scatterlist *sg_req,
 968                                        struct scatterlist *sg_resp)
 969 {
 970         struct zfcp_adapter *adapter = req->adapter;
 971         struct zfcp_qdio *qdio = adapter->qdio;
 972         struct fsf_qtcb *qtcb = req->qtcb;
 973         u32 feat = adapter->adapter_features;
 974
 975         if (zfcp_adapter_multi_buffer_active(adapter)) {
 976                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 977                         return -EIO;
 978                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 979                         return -EIO;
 980
 981                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
 982                                         zfcp_qdio_sbale_count(sg_req));
 983                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 984                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
 985                 return 0;
 986         }
 987
 988         /* use single, unchained SBAL if it can hold the request */
 989         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
 990                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
 991                                                 sg_req, sg_resp);
 992                 return 0;
 993         }
 994
 995         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
 996                 return -EOPNOTSUPP;
 997
 998         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 999                 return -EIO;
1000
1001         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1002
1003         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1004         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1005
1006         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1007                 return -EIO;
1008
1009         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1010
1011         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1012
1013         return 0;
1014 }
1015
1016 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1017                                  struct scatterlist *sg_req,
1018                                  struct scatterlist *sg_resp,
1019                                  unsigned int timeout)
1020 {
1021         int ret;
1022
1023         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1024         if (ret)
1025                 return ret;
1026
1027         /* common settings for ct/gs and els requests */
1028         if (timeout > 255)
1029                 timeout = 255; /* max value accepted by hardware */
1030         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1031         req->qtcb->bottom.support.timeout = timeout;
1032         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1033
1034         return 0;
1035 }
1036
1037 /**
1038  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1039  * @ct: pointer to struct zfcp_send_ct with data for request
1040  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1041  */
1042 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1043                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1044                      unsigned int timeout)
1045 {
1046         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1047         struct zfcp_fsf_req *req;
1048         int ret = -EIO;
1049
1050         spin_lock_irq(&qdio->req_q_lock);
1051         if (zfcp_qdio_sbal_get(qdio))
1052                 goto out;
1053
1054         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1055                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1056
1057         if (IS_ERR(req)) {
1058                 ret = PTR_ERR(req);
1059                 goto out;
1060         }
1061
1062         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1063         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1064         if (ret)
1065                 goto failed_send;
1066
1067         req->handler = zfcp_fsf_send_ct_handler;
1068         req->qtcb->header.port_handle = wka_port->handle;
1069         req->data = ct;
1070
1071         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1072
1073         ret = zfcp_fsf_req_send(req);
1074         if (ret)
1075                 goto failed_send;
1076
1077         goto out;
1078
1079 failed_send:
1080         zfcp_fsf_req_free(req);
1081 out:
1082         spin_unlock_irq(&qdio->req_q_lock);
1083         return ret;
1084 }
1085
1086 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1087 {
1088         struct zfcp_fsf_ct_els *send_els = req->data;
1089         struct zfcp_port *port = send_els->port;
1090         struct fsf_qtcb_header *header = &req->qtcb->header;
1091
1092         send_els->status = -EINVAL;
1093
1094         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1095                 goto skip_fsfstatus;
1096
1097         switch (header->fsf_status) {
1098         case FSF_GOOD:
1099                 zfcp_dbf_san_res("fsselh1", req);
1100                 send_els->status = 0;
1101                 break;
1102         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1103                 zfcp_fsf_class_not_supp(req);
1104                 break;
1105         case FSF_ADAPTER_STATUS_AVAILABLE:
1106                 switch (header->fsf_status_qual.word[0]){
1107                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1108                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1109                 case FSF_SQ_RETRY_IF_POSSIBLE:
1110                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1111                         break;
1112                 }
1113                 break;
1114         case FSF_ELS_COMMAND_REJECTED:
1115         case FSF_PAYLOAD_SIZE_MISMATCH:
1116         case FSF_REQUEST_SIZE_TOO_LARGE:
1117         case FSF_RESPONSE_SIZE_TOO_LARGE:
1118                 break;
1119         case FSF_ACCESS_DENIED:
1120                 if (port) {
1121                         zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1122                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1123                 }
1124                 break;
1125         case FSF_SBAL_MISMATCH:
1126                 /* should never occur, avoided in zfcp_fsf_send_els */
1127                 /* fall through */
1128         default:
1129                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1130                 break;
1131         }
1132 skip_fsfstatus:
1133         if (send_els->handler)
1134                 send_els->handler(send_els->handler_data);
1135 }
1136
1137 /**
1138  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1139  * @els: pointer to struct zfcp_send_els with data for the command
1140  */
1141 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1142                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1143 {
1144         struct zfcp_fsf_req *req;
1145         struct zfcp_qdio *qdio = adapter->qdio;
1146         int ret = -EIO;
1147
1148         spin_lock_irq(&qdio->req_q_lock);
1149         if (zfcp_qdio_sbal_get(qdio))
1150                 goto out;
1151
1152         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1153                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1154
1155         if (IS_ERR(req)) {
1156                 ret = PTR_ERR(req);
1157                 goto out;
1158         }
1159
1160         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1161
1162         if (!zfcp_adapter_multi_buffer_active(adapter))
1163                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1164
1165         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1166
1167         if (ret)
1168                 goto failed_send;
1169
1170         hton24(req->qtcb->bottom.support.d_id, d_id);
1171         req->handler = zfcp_fsf_send_els_handler;
1172         req->data = els;
1173
1174         zfcp_dbf_san_req("fssels1", req, d_id);
1175
1176         ret = zfcp_fsf_req_send(req);
1177         if (ret)
1178                 goto failed_send;
1179
1180         goto out;
1181
1182 failed_send:
1183         zfcp_fsf_req_free(req);
1184 out:
1185         spin_unlock_irq(&qdio->req_q_lock);
1186         return ret;
1187 }
1188
1189 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1190 {
1191         struct zfcp_fsf_req *req;
1192         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1193         int retval = -EIO;
1194
1195         spin_lock_irq(&qdio->req_q_lock);
1196         if (zfcp_qdio_sbal_get(qdio))
1197                 goto out;
1198
1199         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1200                                   SBAL_SFLAGS0_TYPE_READ,
1201                                   qdio->adapter->pool.erp_req);
1202
1203         if (IS_ERR(req)) {
1204                 retval = PTR_ERR(req);
1205                 goto out;
1206         }
1207
1208         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1209         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1210
1211         req->qtcb->bottom.config.feature_selection =
1212                         FSF_FEATURE_CFDC |
1213                         FSF_FEATURE_LUN_SHARING |
1214                         FSF_FEATURE_NOTIFICATION_LOST |
1215                         FSF_FEATURE_UPDATE_ALERT;
1216         req->erp_action = erp_action;
1217         req->handler = zfcp_fsf_exchange_config_data_handler;
1218         erp_action->fsf_req_id = req->req_id;
1219
1220         zfcp_fsf_start_erp_timer(req);
1221         retval = zfcp_fsf_req_send(req);
1222         if (retval) {
1223                 zfcp_fsf_req_free(req);
1224                 erp_action->fsf_req_id = 0;
1225         }
1226 out:
1227         spin_unlock_irq(&qdio->req_q_lock);
1228         return retval;
1229 }
1230
1231 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1232                                        struct fsf_qtcb_bottom_config *data)
1233 {
1234         struct zfcp_fsf_req *req = NULL;
1235         int retval = -EIO;
1236
1237         spin_lock_irq(&qdio->req_q_lock);
1238         if (zfcp_qdio_sbal_get(qdio))
1239                 goto out_unlock;
1240
1241         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1242                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1243
1244         if (IS_ERR(req)) {
1245                 retval = PTR_ERR(req);
1246                 goto out_unlock;
1247         }
1248
1249         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1250         req->handler = zfcp_fsf_exchange_config_data_handler;
1251
1252         req->qtcb->bottom.config.feature_selection =
1253                         FSF_FEATURE_CFDC |
1254                         FSF_FEATURE_LUN_SHARING |
1255                         FSF_FEATURE_NOTIFICATION_LOST |
1256                         FSF_FEATURE_UPDATE_ALERT;
1257
1258         if (data)
1259                 req->data = data;
1260
1261         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1262         retval = zfcp_fsf_req_send(req);
1263         spin_unlock_irq(&qdio->req_q_lock);
1264         if (!retval)
1265                 wait_for_completion(&req->completion);
1266
1267         zfcp_fsf_req_free(req);
1268         return retval;
1269
1270 out_unlock:
1271         spin_unlock_irq(&qdio->req_q_lock);
1272         return retval;
1273 }
1274
1275 /**
1276  * zfcp_fsf_exchange_port_data - request information about local port
1277  * @erp_action: ERP action for the adapter for which port data is requested
1278  * Returns: 0 on success, error otherwise
1279  */
1280 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1281 {
1282         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1283         struct zfcp_fsf_req *req;
1284         int retval = -EIO;
1285
1286         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1287                 return -EOPNOTSUPP;
1288
1289         spin_lock_irq(&qdio->req_q_lock);
1290         if (zfcp_qdio_sbal_get(qdio))
1291                 goto out;
1292
1293         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1294                                   SBAL_SFLAGS0_TYPE_READ,
1295                                   qdio->adapter->pool.erp_req);
1296
1297         if (IS_ERR(req)) {
1298                 retval = PTR_ERR(req);
1299                 goto out;
1300         }
1301
1302         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1303         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1304
1305         req->handler = zfcp_fsf_exchange_port_data_handler;
1306         req->erp_action = erp_action;
1307         erp_action->fsf_req_id = req->req_id;
1308
1309         zfcp_fsf_start_erp_timer(req);
1310         retval = zfcp_fsf_req_send(req);
1311         if (retval) {
1312                 zfcp_fsf_req_free(req);
1313                 erp_action->fsf_req_id = 0;
1314         }
1315 out:
1316         spin_unlock_irq(&qdio->req_q_lock);
1317         return retval;
1318 }
1319
1320 /**
1321  * zfcp_fsf_exchange_port_data_sync - request information about local port
1322  * @qdio: pointer to struct zfcp_qdio
1323  * @data: pointer to struct fsf_qtcb_bottom_port
1324  * Returns: 0 on success, error otherwise
1325  */
1326 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1327                                      struct fsf_qtcb_bottom_port *data)
1328 {
1329         struct zfcp_fsf_req *req = NULL;
1330         int retval = -EIO;
1331
1332         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1333                 return -EOPNOTSUPP;
1334
1335         spin_lock_irq(&qdio->req_q_lock);
1336         if (zfcp_qdio_sbal_get(qdio))
1337                 goto out_unlock;
1338
1339         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1340                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1341
1342         if (IS_ERR(req)) {
1343                 retval = PTR_ERR(req);
1344                 goto out_unlock;
1345         }
1346
1347         if (data)
1348                 req->data = data;
1349
1350         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1351
1352         req->handler = zfcp_fsf_exchange_port_data_handler;
1353         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1354         retval = zfcp_fsf_req_send(req);
1355         spin_unlock_irq(&qdio->req_q_lock);
1356
1357         if (!retval)
1358                 wait_for_completion(&req->completion);
1359
1360         zfcp_fsf_req_free(req);
1361
1362         return retval;
1363
1364 out_unlock:
1365         spin_unlock_irq(&qdio->req_q_lock);
1366         return retval;
1367 }
1368
1369 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1370 {
1371         struct zfcp_port *port = req->data;
1372         struct fsf_qtcb_header *header = &req->qtcb->header;
1373         struct fc_els_flogi *plogi;
1374
1375         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1376                 goto out;
1377
1378         switch (header->fsf_status) {
1379         case FSF_PORT_ALREADY_OPEN:
1380                 break;
1381         case FSF_ACCESS_DENIED:
1382                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1383                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1384                 break;
1385         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1386                 dev_warn(&req->adapter->ccw_device->dev,
1387                          "Not enough FCP adapter resources to open "
1388                          "remote port 0x%016Lx\n",
1389                          (unsigned long long)port->wwpn);
1390                 zfcp_erp_set_port_status(port,
1391                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1392                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1393                 break;
1394         case FSF_ADAPTER_STATUS_AVAILABLE:
1395                 switch (header->fsf_status_qual.word[0]) {
1396                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1397                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1398                 case FSF_SQ_NO_RETRY_POSSIBLE:
1399                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1400                         break;
1401                 }
1402                 break;
1403         case FSF_GOOD:
1404                 port->handle = header->port_handle;
1405                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1406                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1407                 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1408                                   ZFCP_STATUS_COMMON_ACCESS_BOXED,
1409                                   &port->status);
1410                 /* check whether D_ID has changed during open */
1411                 /*
1412                  * FIXME: This check is not airtight, as the FCP channel does
1413                  * not monitor closures of target port connections caused on
1414                  * the remote side. Thus, they might miss out on invalidating
1415                  * locally cached WWPNs (and other N_Port parameters) of gone
1416                  * target ports. So, our heroic attempt to make things safe
1417                  * could be undermined by 'open port' response data tagged with
1418                  * obsolete WWPNs. Another reason to monitor potential
1419                  * connection closures ourself at least (by interpreting
1420                  * incoming ELS' and unsolicited status). It just crosses my
1421                  * mind that one should be able to cross-check by means of
1422                  * another GID_PN straight after a port has been opened.
1423                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1424                  */
1425                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1426                 if (req->qtcb->bottom.support.els1_length >=
1427                     FSF_PLOGI_MIN_LEN)
1428                                 zfcp_fc_plogi_evaluate(port, plogi);
1429                 break;
1430         case FSF_UNKNOWN_OP_SUBTYPE:
1431                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1432                 break;
1433         }
1434
1435 out:
1436         put_device(&port->dev);
1437 }
1438
1439 /**
1440  * zfcp_fsf_open_port - create and send open port request
1441  * @erp_action: pointer to struct zfcp_erp_action
1442  * Returns: 0 on success, error otherwise
1443  */
1444 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1445 {
1446         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1447         struct zfcp_port *port = erp_action->port;
1448         struct zfcp_fsf_req *req;
1449         int retval = -EIO;
1450
1451         spin_lock_irq(&qdio->req_q_lock);
1452         if (zfcp_qdio_sbal_get(qdio))
1453                 goto out;
1454
1455         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1456                                   SBAL_SFLAGS0_TYPE_READ,
1457                                   qdio->adapter->pool.erp_req);
1458
1459         if (IS_ERR(req)) {
1460                 retval = PTR_ERR(req);
1461                 goto out;
1462         }
1463
1464         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1465         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1466
1467         req->handler = zfcp_fsf_open_port_handler;
1468         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1469         req->data = port;
1470         req->erp_action = erp_action;
1471         erp_action->fsf_req_id = req->req_id;
1472         get_device(&port->dev);
1473
1474         zfcp_fsf_start_erp_timer(req);
1475         retval = zfcp_fsf_req_send(req);
1476         if (retval) {
1477                 zfcp_fsf_req_free(req);
1478                 erp_action->fsf_req_id = 0;
1479                 put_device(&port->dev);
1480         }
1481 out:
1482         spin_unlock_irq(&qdio->req_q_lock);
1483         return retval;
1484 }
1485
1486 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1487 {
1488         struct zfcp_port *port = req->data;
1489
1490         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1491                 return;
1492
1493         switch (req->qtcb->header.fsf_status) {
1494         case FSF_PORT_HANDLE_NOT_VALID:
1495                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1496                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1497                 break;
1498         case FSF_ADAPTER_STATUS_AVAILABLE:
1499                 break;
1500         case FSF_GOOD:
1501                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1502                 break;
1503         }
1504 }
1505
1506 /**
1507  * zfcp_fsf_close_port - create and send close port request
1508  * @erp_action: pointer to struct zfcp_erp_action
1509  * Returns: 0 on success, error otherwise
1510  */
1511 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1512 {
1513         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1514         struct zfcp_fsf_req *req;
1515         int retval = -EIO;
1516
1517         spin_lock_irq(&qdio->req_q_lock);
1518         if (zfcp_qdio_sbal_get(qdio))
1519                 goto out;
1520
1521         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1522                                   SBAL_SFLAGS0_TYPE_READ,
1523                                   qdio->adapter->pool.erp_req);
1524
1525         if (IS_ERR(req)) {
1526                 retval = PTR_ERR(req);
1527                 goto out;
1528         }
1529
1530         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1531         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1532
1533         req->handler = zfcp_fsf_close_port_handler;
1534         req->data = erp_action->port;
1535         req->erp_action = erp_action;
1536         req->qtcb->header.port_handle = erp_action->port->handle;
1537         erp_action->fsf_req_id = req->req_id;
1538
1539         zfcp_fsf_start_erp_timer(req);
1540         retval = zfcp_fsf_req_send(req);
1541         if (retval) {
1542                 zfcp_fsf_req_free(req);
1543                 erp_action->fsf_req_id = 0;
1544         }
1545 out:
1546         spin_unlock_irq(&qdio->req_q_lock);
1547         return retval;
1548 }
1549
1550 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1551 {
1552         struct zfcp_fc_wka_port *wka_port = req->data;
1553         struct fsf_qtcb_header *header = &req->qtcb->header;
1554
1555         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1556                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1557                 goto out;
1558         }
1559
1560         switch (header->fsf_status) {
1561         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1562                 dev_warn(&req->adapter->ccw_device->dev,
1563                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1564                 /* fall through */
1565         case FSF_ADAPTER_STATUS_AVAILABLE:
1566                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1567                 /* fall through */
1568         case FSF_ACCESS_DENIED:
1569                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1570                 break;
1571         case FSF_GOOD:
1572                 wka_port->handle = header->port_handle;
1573                 /* fall through */
1574         case FSF_PORT_ALREADY_OPEN:
1575                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1576         }
1577 out:
1578         wake_up(&wka_port->completion_wq);
1579 }
1580
1581 /**
1582  * zfcp_fsf_open_wka_port - create and send open wka-port request
1583  * @wka_port: pointer to struct zfcp_fc_wka_port
1584  * Returns: 0 on success, error otherwise
1585  */
1586 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1587 {
1588         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1589         struct zfcp_fsf_req *req;
1590         int retval = -EIO;
1591
1592         spin_lock_irq(&qdio->req_q_lock);
1593         if (zfcp_qdio_sbal_get(qdio))
1594                 goto out;
1595
1596         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1597                                   SBAL_SFLAGS0_TYPE_READ,
1598                                   qdio->adapter->pool.erp_req);
1599
1600         if (IS_ERR(req)) {
1601                 retval = PTR_ERR(req);
1602                 goto out;
1603         }
1604
1605         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1606         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1607
1608         req->handler = zfcp_fsf_open_wka_port_handler;
1609         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1610         req->data = wka_port;
1611
1612         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1613         retval = zfcp_fsf_req_send(req);
1614         if (retval)
1615                 zfcp_fsf_req_free(req);
1616 out:
1617         spin_unlock_irq(&qdio->req_q_lock);
1618         return retval;
1619 }
1620
1621 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1622 {
1623         struct zfcp_fc_wka_port *wka_port = req->data;
1624
1625         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1626                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1627                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1628         }
1629
1630         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1631         wake_up(&wka_port->completion_wq);
1632 }
1633
1634 /**
1635  * zfcp_fsf_close_wka_port - create and send close wka port request
1636  * @wka_port: WKA port to open
1637  * Returns: 0 on success, error otherwise
1638  */
1639 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1640 {
1641         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1642         struct zfcp_fsf_req *req;
1643         int retval = -EIO;
1644
1645         spin_lock_irq(&qdio->req_q_lock);
1646         if (zfcp_qdio_sbal_get(qdio))
1647                 goto out;
1648
1649         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1650                                   SBAL_SFLAGS0_TYPE_READ,
1651                                   qdio->adapter->pool.erp_req);
1652
1653         if (IS_ERR(req)) {
1654                 retval = PTR_ERR(req);
1655                 goto out;
1656         }
1657
1658         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1659         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1660
1661         req->handler = zfcp_fsf_close_wka_port_handler;
1662         req->data = wka_port;
1663         req->qtcb->header.port_handle = wka_port->handle;
1664
1665         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1666         retval = zfcp_fsf_req_send(req);
1667         if (retval)
1668                 zfcp_fsf_req_free(req);
1669 out:
1670         spin_unlock_irq(&qdio->req_q_lock);
1671         return retval;
1672 }
1673
1674 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1675 {
1676         struct zfcp_port *port = req->data;
1677         struct fsf_qtcb_header *header = &req->qtcb->header;
1678         struct scsi_device *sdev;
1679
1680         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1681                 return;
1682
1683         switch (header->fsf_status) {
1684         case FSF_PORT_HANDLE_NOT_VALID:
1685                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1686                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1687                 break;
1688         case FSF_ACCESS_DENIED:
1689                 zfcp_cfdc_port_denied(port, &header->fsf_status_qual);
1690                 break;
1691         case FSF_PORT_BOXED:
1692                 /* can't use generic zfcp_erp_modify_port_status because
1693                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1694                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1695                 shost_for_each_device(sdev, port->adapter->scsi_host)
1696                         if (sdev_to_zfcp(sdev)->port == port)
1697                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1698                                                   &sdev_to_zfcp(sdev)->status);
1699                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1700                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1701                                      "fscpph2");
1702                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1703                 break;
1704         case FSF_ADAPTER_STATUS_AVAILABLE:
1705                 switch (header->fsf_status_qual.word[0]) {
1706                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1707                         /* fall through */
1708                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1709                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1710                         break;
1711                 }
1712                 break;
1713         case FSF_GOOD:
1714                 /* can't use generic zfcp_erp_modify_port_status because
1715                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1716                  */
1717                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1718                 shost_for_each_device(sdev, port->adapter->scsi_host)
1719                         if (sdev_to_zfcp(sdev)->port == port)
1720                                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1721                                                   &sdev_to_zfcp(sdev)->status);
1722                 break;
1723         }
1724 }
1725
1726 /**
1727  * zfcp_fsf_close_physical_port - close physical port
1728  * @erp_action: pointer to struct zfcp_erp_action
1729  * Returns: 0 on success
1730  */
1731 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1732 {
1733         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1734         struct zfcp_fsf_req *req;
1735         int retval = -EIO;
1736
1737         spin_lock_irq(&qdio->req_q_lock);
1738         if (zfcp_qdio_sbal_get(qdio))
1739                 goto out;
1740
1741         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1742                                   SBAL_SFLAGS0_TYPE_READ,
1743                                   qdio->adapter->pool.erp_req);
1744
1745         if (IS_ERR(req)) {
1746                 retval = PTR_ERR(req);
1747                 goto out;
1748         }
1749
1750         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1751         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1752
1753         req->data = erp_action->port;
1754         req->qtcb->header.port_handle = erp_action->port->handle;
1755         req->erp_action = erp_action;
1756         req->handler = zfcp_fsf_close_physical_port_handler;
1757         erp_action->fsf_req_id = req->req_id;
1758
1759         zfcp_fsf_start_erp_timer(req);
1760         retval = zfcp_fsf_req_send(req);
1761         if (retval) {
1762                 zfcp_fsf_req_free(req);
1763                 erp_action->fsf_req_id = 0;
1764         }
1765 out:
1766         spin_unlock_irq(&qdio->req_q_lock);
1767         return retval;
1768 }
1769
1770 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1771 {
1772         struct zfcp_adapter *adapter = req->adapter;
1773         struct scsi_device *sdev = req->data;
1774         struct zfcp_scsi_dev *zfcp_sdev;
1775         struct fsf_qtcb_header *header = &req->qtcb->header;
1776         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1777
1778         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1779                 return;
1780
1781         zfcp_sdev = sdev_to_zfcp(sdev);
1782
1783         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1784                           ZFCP_STATUS_COMMON_ACCESS_BOXED |
1785                           ZFCP_STATUS_LUN_SHARED |
1786                           ZFCP_STATUS_LUN_READONLY,
1787                           &zfcp_sdev->status);
1788
1789         switch (header->fsf_status) {
1790
1791         case FSF_PORT_HANDLE_NOT_VALID:
1792                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1793                 /* fall through */
1794         case FSF_LUN_ALREADY_OPEN:
1795                 break;
1796         case FSF_ACCESS_DENIED:
1797                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
1798                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1799                 break;
1800         case FSF_PORT_BOXED:
1801                 zfcp_erp_set_port_status(zfcp_sdev->port,
1802                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1803                 zfcp_erp_port_reopen(zfcp_sdev->port,
1804                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1805                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1806                 break;
1807         case FSF_LUN_SHARING_VIOLATION:
1808                 zfcp_cfdc_lun_shrng_vltn(sdev, &header->fsf_status_qual);
1809                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1810                 break;
1811         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1812                 dev_warn(&adapter->ccw_device->dev,
1813                          "No handle is available for LUN "
1814                          "0x%016Lx on port 0x%016Lx\n",
1815                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1816                          (unsigned long long)zfcp_sdev->port->wwpn);
1817                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1818                 /* fall through */
1819         case FSF_INVALID_COMMAND_OPTION:
1820                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1821                 break;
1822         case FSF_ADAPTER_STATUS_AVAILABLE:
1823                 switch (header->fsf_status_qual.word[0]) {
1824                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1825                         zfcp_fc_test_link(zfcp_sdev->port);
1826                         /* fall through */
1827                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1828                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1829                         break;
1830                 }
1831                 break;
1832
1833         case FSF_GOOD:
1834                 zfcp_sdev->lun_handle = header->lun_handle;
1835                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1836                 zfcp_cfdc_open_lun_eval(sdev, bottom);
1837                 break;
1838         }
1839 }
1840
1841 /**
1842  * zfcp_fsf_open_lun - open LUN
1843  * @erp_action: pointer to struct zfcp_erp_action
1844  * Returns: 0 on success, error otherwise
1845  */
1846 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1847 {
1848         struct zfcp_adapter *adapter = erp_action->adapter;
1849         struct zfcp_qdio *qdio = adapter->qdio;
1850         struct zfcp_fsf_req *req;
1851         int retval = -EIO;
1852
1853         spin_lock_irq(&qdio->req_q_lock);
1854         if (zfcp_qdio_sbal_get(qdio))
1855                 goto out;
1856
1857         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1858                                   SBAL_SFLAGS0_TYPE_READ,
1859                                   adapter->pool.erp_req);
1860
1861         if (IS_ERR(req)) {
1862                 retval = PTR_ERR(req);
1863                 goto out;
1864         }
1865
1866         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1867         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1868
1869         req->qtcb->header.port_handle = erp_action->port->handle;
1870         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1871         req->handler = zfcp_fsf_open_lun_handler;
1872         req->data = erp_action->sdev;
1873         req->erp_action = erp_action;
1874         erp_action->fsf_req_id = req->req_id;
1875
1876         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1877                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1878
1879         zfcp_fsf_start_erp_timer(req);
1880         retval = zfcp_fsf_req_send(req);
1881         if (retval) {
1882                 zfcp_fsf_req_free(req);
1883                 erp_action->fsf_req_id = 0;
1884         }
1885 out:
1886         spin_unlock_irq(&qdio->req_q_lock);
1887         return retval;
1888 }
1889
1890 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1891 {
1892         struct scsi_device *sdev = req->data;
1893         struct zfcp_scsi_dev *zfcp_sdev;
1894
1895         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1896                 return;
1897
1898         zfcp_sdev = sdev_to_zfcp(sdev);
1899
1900         switch (req->qtcb->header.fsf_status) {
1901         case FSF_PORT_HANDLE_NOT_VALID:
1902                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1903                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1904                 break;
1905         case FSF_LUN_HANDLE_NOT_VALID:
1906                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1907                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908                 break;
1909         case FSF_PORT_BOXED:
1910                 zfcp_erp_set_port_status(zfcp_sdev->port,
1911                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1912                 zfcp_erp_port_reopen(zfcp_sdev->port,
1913                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1914                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1915                 break;
1916         case FSF_ADAPTER_STATUS_AVAILABLE:
1917                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1918                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1919                         zfcp_fc_test_link(zfcp_sdev->port);
1920                         /* fall through */
1921                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1922                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1923                         break;
1924                 }
1925                 break;
1926         case FSF_GOOD:
1927                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1928                 break;
1929         }
1930 }
1931
1932 /**
1933  * zfcp_fsf_close_LUN - close LUN
1934  * @erp_action: pointer to erp_action triggering the "close LUN"
1935  * Returns: 0 on success, error otherwise
1936  */
1937 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1938 {
1939         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1940         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1941         struct zfcp_fsf_req *req;
1942         int retval = -EIO;
1943
1944         spin_lock_irq(&qdio->req_q_lock);
1945         if (zfcp_qdio_sbal_get(qdio))
1946                 goto out;
1947
1948         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1949                                   SBAL_SFLAGS0_TYPE_READ,
1950                                   qdio->adapter->pool.erp_req);
1951
1952         if (IS_ERR(req)) {
1953                 retval = PTR_ERR(req);
1954                 goto out;
1955         }
1956
1957         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1958         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1959
1960         req->qtcb->header.port_handle = erp_action->port->handle;
1961         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1962         req->handler = zfcp_fsf_close_lun_handler;
1963         req->data = erp_action->sdev;
1964         req->erp_action = erp_action;
1965         erp_action->fsf_req_id = req->req_id;
1966
1967         zfcp_fsf_start_erp_timer(req);
1968         retval = zfcp_fsf_req_send(req);
1969         if (retval) {
1970                 zfcp_fsf_req_free(req);
1971                 erp_action->fsf_req_id = 0;
1972         }
1973 out:
1974         spin_unlock_irq(&qdio->req_q_lock);
1975         return retval;
1976 }
1977
1978 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1979 {
1980         lat_rec->sum += lat;
1981         lat_rec->min = min(lat_rec->min, lat);
1982         lat_rec->max = max(lat_rec->max, lat);
1983 }
1984
1985 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1986 {
1987         struct fsf_qual_latency_info *lat_in;
1988         struct latency_cont *lat = NULL;
1989         struct zfcp_scsi_dev *zfcp_sdev;
1990         struct zfcp_blk_drv_data blktrc;
1991         int ticks = req->adapter->timer_ticks;
1992
1993         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1994
1995         blktrc.flags = 0;
1996         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1997         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1998                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1999         blktrc.inb_usage = 0;
2000         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2001
2002         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2003             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2004                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2005                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2006                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2007                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2008
2009                 switch (req->qtcb->bottom.io.data_direction) {
2010                 case FSF_DATADIR_DIF_READ_STRIP:
2011                 case FSF_DATADIR_DIF_READ_CONVERT:
2012                 case FSF_DATADIR_READ:
2013                         lat = &zfcp_sdev->latencies.read;
2014                         break;
2015                 case FSF_DATADIR_DIF_WRITE_INSERT:
2016                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2017                 case FSF_DATADIR_WRITE:
2018                         lat = &zfcp_sdev->latencies.write;
2019                         break;
2020                 case FSF_DATADIR_CMND:
2021                         lat = &zfcp_sdev->latencies.cmd;
2022                         break;
2023                 }
2024
2025                 if (lat) {
2026                         spin_lock(&zfcp_sdev->latencies.lock);
2027                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2028                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2029                         lat->counter++;
2030                         spin_unlock(&zfcp_sdev->latencies.lock);
2031                 }
2032         }
2033
2034         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2035                             sizeof(blktrc));
2036 }
2037
2038 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2039 {
2040         struct scsi_cmnd *scmnd = req->data;
2041         struct scsi_device *sdev = scmnd->device;
2042         struct zfcp_scsi_dev *zfcp_sdev;
2043         struct fsf_qtcb_header *header = &req->qtcb->header;
2044
2045         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2046                 return;
2047
2048         zfcp_sdev = sdev_to_zfcp(sdev);
2049
2050         switch (header->fsf_status) {
2051         case FSF_HANDLE_MISMATCH:
2052         case FSF_PORT_HANDLE_NOT_VALID:
2053                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2054                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2055                 break;
2056         case FSF_FCPLUN_NOT_VALID:
2057         case FSF_LUN_HANDLE_NOT_VALID:
2058                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2059                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2060                 break;
2061         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2062                 zfcp_fsf_class_not_supp(req);
2063                 break;
2064         case FSF_ACCESS_DENIED:
2065                 zfcp_cfdc_lun_denied(sdev, &header->fsf_status_qual);
2066                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2067                 break;
2068         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2069                 dev_err(&req->adapter->ccw_device->dev,
2070                         "Incorrect direction %d, LUN 0x%016Lx on port "
2071                         "0x%016Lx closed\n",
2072                         req->qtcb->bottom.io.data_direction,
2073                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2074                         (unsigned long long)zfcp_sdev->port->wwpn);
2075                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2076                                           "fssfch3");
2077                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2078                 break;
2079         case FSF_CMND_LENGTH_NOT_VALID:
2080                 dev_err(&req->adapter->ccw_device->dev,
2081                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2082                         "port 0x%016Lx closed\n",
2083                         req->qtcb->bottom.io.fcp_cmnd_length,
2084                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2085                         (unsigned long long)zfcp_sdev->port->wwpn);
2086                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2087                                           "fssfch4");
2088                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2089                 break;
2090         case FSF_PORT_BOXED:
2091                 zfcp_erp_set_port_status(zfcp_sdev->port,
2092                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2093                 zfcp_erp_port_reopen(zfcp_sdev->port,
2094                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2095                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2096                 break;
2097         case FSF_LUN_BOXED:
2098                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2099                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2100                                     "fssfch6");
2101                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2102                 break;
2103         case FSF_ADAPTER_STATUS_AVAILABLE:
2104                 if (header->fsf_status_qual.word[0] ==
2105                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2106                         zfcp_fc_test_link(zfcp_sdev->port);
2107                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2108                 break;
2109         }
2110 }
2111
2112 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2113 {
2114         struct scsi_cmnd *scpnt;
2115         struct fcp_resp_with_ext *fcp_rsp;
2116         unsigned long flags;
2117
2118         read_lock_irqsave(&req->adapter->abort_lock, flags);
2119
2120         scpnt = req->data;
2121         if (unlikely(!scpnt)) {
2122                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2123                 return;
2124         }
2125
2126         zfcp_fsf_fcp_handler_common(req);
2127
2128         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2129                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2130                 goto skip_fsfstatus;
2131         }
2132
2133         switch (req->qtcb->header.fsf_status) {
2134         case FSF_INCONSISTENT_PROT_DATA:
2135         case FSF_INVALID_PROT_PARM:
2136                 set_host_byte(scpnt, DID_ERROR);
2137                 goto skip_fsfstatus;
2138         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2139                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2140                 goto skip_fsfstatus;
2141         case FSF_APP_TAG_CHECK_FAILURE:
2142                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2143                 goto skip_fsfstatus;
2144         case FSF_REF_TAG_CHECK_FAILURE:
2145                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2146                 goto skip_fsfstatus;
2147         }
2148         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2149         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2150
2151 skip_fsfstatus:
2152         zfcp_fsf_req_trace(req, scpnt);
2153         zfcp_dbf_scsi_result(scpnt, req);
2154
2155         scpnt->host_scribble = NULL;
2156         (scpnt->scsi_done) (scpnt);
2157         /*
2158          * We must hold this lock until scsi_done has been called.
2159          * Otherwise we may call scsi_done after abort regarding this
2160          * command has completed.
2161          * Note: scsi_done must not block!
2162          */
2163         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2164 }
2165
2166 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2167 {
2168         switch (scsi_get_prot_op(scsi_cmnd)) {
2169         case SCSI_PROT_NORMAL:
2170                 switch (scsi_cmnd->sc_data_direction) {
2171                 case DMA_NONE:
2172                         *data_dir = FSF_DATADIR_CMND;
2173                         break;
2174                 case DMA_FROM_DEVICE:
2175                         *data_dir = FSF_DATADIR_READ;
2176                         break;
2177                 case DMA_TO_DEVICE:
2178                         *data_dir = FSF_DATADIR_WRITE;
2179                         break;
2180                 case DMA_BIDIRECTIONAL:
2181                         return -EINVAL;
2182                 }
2183                 break;
2184
2185         case SCSI_PROT_READ_STRIP:
2186                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2187                 break;
2188         case SCSI_PROT_WRITE_INSERT:
2189                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2190                 break;
2191         case SCSI_PROT_READ_PASS:
2192                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2193                 break;
2194         case SCSI_PROT_WRITE_PASS:
2195                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2196                 break;
2197         default:
2198                 return -EINVAL;
2199         }
2200
2201         return 0;
2202 }
2203
2204 /**
2205  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2206  * @scsi_cmnd: scsi command to be sent
2207  */
2208 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2209 {
2210         struct zfcp_fsf_req *req;
2211         struct fcp_cmnd *fcp_cmnd;
2212         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2213         int retval = -EIO;
2214         struct scsi_device *sdev = scsi_cmnd->device;
2215         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2216         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2217         struct zfcp_qdio *qdio = adapter->qdio;
2218         struct fsf_qtcb_bottom_io *io;
2219         unsigned long flags;
2220
2221         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2222                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2223                 return -EBUSY;
2224
2225         spin_lock_irqsave(&qdio->req_q_lock, flags);
2226         if (atomic_read(&qdio->req_q_free) <= 0) {
2227                 atomic_inc(&qdio->req_q_full);
2228                 goto out;
2229         }
2230
2231         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2232                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2233
2234         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2235                                   sbtype, adapter->pool.scsi_req);
2236
2237         if (IS_ERR(req)) {
2238                 retval = PTR_ERR(req);
2239                 goto out;
2240         }
2241
2242         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2243
2244         io = &req->qtcb->bottom.io;
2245         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2246         req->data = scsi_cmnd;
2247         req->handler = zfcp_fsf_fcp_cmnd_handler;
2248         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2249         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2250         io->service_class = FSF_CLASS_3;
2251         io->fcp_cmnd_length = FCP_CMND_LEN;
2252
2253         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2254                 io->data_block_length = scsi_cmnd->device->sector_size;
2255                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2256         }
2257
2258         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2259                 goto failed_scsi_cmnd;
2260
2261         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2262         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2263
2264         if (scsi_prot_sg_count(scsi_cmnd)) {
2265                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2266                                        scsi_prot_sg_count(scsi_cmnd));
2267                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2268                                                  scsi_prot_sglist(scsi_cmnd));
2269                 if (retval)
2270                         goto failed_scsi_cmnd;
2271                 io->prot_data_length = zfcp_qdio_real_bytes(
2272                                                 scsi_prot_sglist(scsi_cmnd));
2273         }
2274
2275         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2276                                          scsi_sglist(scsi_cmnd));
2277         if (unlikely(retval))
2278                 goto failed_scsi_cmnd;
2279
2280         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2281         if (zfcp_adapter_multi_buffer_active(adapter))
2282                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2283
2284         retval = zfcp_fsf_req_send(req);
2285         if (unlikely(retval))
2286                 goto failed_scsi_cmnd;
2287
2288         goto out;
2289
2290 failed_scsi_cmnd:
2291         zfcp_fsf_req_free(req);
2292         scsi_cmnd->host_scribble = NULL;
2293 out:
2294         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2295         return retval;
2296 }
2297
2298 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2299 {
2300         struct fcp_resp_with_ext *fcp_rsp;
2301         struct fcp_resp_rsp_info *rsp_info;
2302
2303         zfcp_fsf_fcp_handler_common(req);
2304
2305         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2306         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2307
2308         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2309              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2310                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2311 }
2312
2313 /**
2314  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2315  * @scmnd: SCSI command to send the task management command for
2316  * @tm_flags: unsigned byte for task management flags
2317  * Returns: on success pointer to struct fsf_req, NULL otherwise
2318  */
2319 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2320                                             u8 tm_flags)
2321 {
2322         struct zfcp_fsf_req *req = NULL;
2323         struct fcp_cmnd *fcp_cmnd;
2324         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2325         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2326
2327         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2328                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2329                 return NULL;
2330
2331         spin_lock_irq(&qdio->req_q_lock);
2332         if (zfcp_qdio_sbal_get(qdio))
2333                 goto out;
2334
2335         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2336                                   SBAL_SFLAGS0_TYPE_WRITE,
2337                                   qdio->adapter->pool.scsi_req);
2338
2339         if (IS_ERR(req)) {
2340                 req = NULL;
2341                 goto out;
2342         }
2343
2344         req->data = scmnd;
2345         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2346         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2347         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2348         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2349         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2350         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2351
2352         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2353
2354         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2355         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2356
2357         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2358         if (!zfcp_fsf_req_send(req))
2359                 goto out;
2360
2361         zfcp_fsf_req_free(req);
2362         req = NULL;
2363 out:
2364         spin_unlock_irq(&qdio->req_q_lock);
2365         return req;
2366 }
2367
2368 static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2369 {
2370 }
2371
2372 /**
2373  * zfcp_fsf_control_file - control file upload/download
2374  * @adapter: pointer to struct zfcp_adapter
2375  * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2376  * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
2377  */
2378 struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2379                                            struct zfcp_fsf_cfdc *fsf_cfdc)
2380 {
2381         struct zfcp_qdio *qdio = adapter->qdio;
2382         struct zfcp_fsf_req *req = NULL;
2383         struct fsf_qtcb_bottom_support *bottom;
2384         int retval = -EIO;
2385         u8 direction;
2386
2387         if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2388                 return ERR_PTR(-EOPNOTSUPP);
2389
2390         switch (fsf_cfdc->command) {
2391         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2392                 direction = SBAL_SFLAGS0_TYPE_WRITE;
2393                 break;
2394         case FSF_QTCB_UPLOAD_CONTROL_FILE:
2395                 direction = SBAL_SFLAGS0_TYPE_READ;
2396                 break;
2397         default:
2398                 return ERR_PTR(-EINVAL);
2399         }
2400
2401         spin_lock_irq(&qdio->req_q_lock);
2402         if (zfcp_qdio_sbal_get(qdio))
2403                 goto out;
2404
2405         req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL);
2406         if (IS_ERR(req)) {
2407                 retval = -EPERM;
2408                 goto out;
2409         }
2410
2411         req->handler = zfcp_fsf_control_file_handler;
2412
2413         bottom = &req->qtcb->bottom.support;
2414         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2415         bottom->option = fsf_cfdc->option;
2416
2417         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
2418
2419         if (retval ||
2420                 (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
2421                 zfcp_fsf_req_free(req);
2422                 retval = -EIO;
2423                 goto out;
2424         }
2425         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2426         if (zfcp_adapter_multi_buffer_active(adapter))
2427                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2428
2429         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2430         retval = zfcp_fsf_req_send(req);
2431 out:
2432         spin_unlock_irq(&qdio->req_q_lock);
2433
2434         if (!retval) {
2435                 wait_for_completion(&req->completion);
2436                 return req;
2437         }
2438         return ERR_PTR(retval);
2439 }
2440
2441 /**
2442  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2443  * @adapter: pointer to struct zfcp_adapter
2444  * @sbal_idx: response queue index of SBAL to be processed
2445  */
2446 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2447 {
2448         struct zfcp_adapter *adapter = qdio->adapter;
2449         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2450         struct qdio_buffer_element *sbale;
2451         struct zfcp_fsf_req *fsf_req;
2452         unsigned long req_id;
2453         int idx;
2454
2455         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2456
2457                 sbale = &sbal->element[idx];
2458                 req_id = (unsigned long) sbale->addr;
2459                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2460
2461                 if (!fsf_req) {
2462                         /*
2463                          * Unknown request means that we have potentially memory
2464                          * corruption and must stop the machine immediately.
2465                          */
2466                         zfcp_qdio_siosl(adapter);
2467                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2468                               req_id, dev_name(&adapter->ccw_device->dev));
2469                 }
2470
2471                 fsf_req->qdio_req.sbal_response = sbal_idx;
2472                 zfcp_fsf_req_complete(fsf_req);
2473
2474                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2475                         break;
2476         }
2477 }
2478
2479 struct zfcp_fsf_req *zfcp_fsf_get_req(struct zfcp_qdio *qdio,
2480                                       struct qdio_buffer *sbal)
2481 {
2482         struct qdio_buffer_element *sbale = &sbal->element[0];
2483         u64 req_id = (unsigned long) sbale->addr;
2484
2485         return zfcp_reqlist_find(qdio->adapter->req_list, req_id);
2486 }