drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corp. 2002, 2015
   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 bool ber_stop = true;
  24 module_param(ber_stop, bool, 0600);
  25 MODULE_PARM_DESC(ber_stop,
  26                  "Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)");
  27
  28 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  29 {
  30         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  31         zfcp_qdio_siosl(adapter);
  32         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  33                                 "fsrth_1");
  34 }
  35
  36 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  37                                  unsigned long timeout)
  38 {
  39         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  40         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  41         fsf_req->timer.expires = jiffies + timeout;
  42         add_timer(&fsf_req->timer);
  43 }
  44
  45 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  46 {
  47         BUG_ON(!fsf_req->erp_action);
  48         fsf_req->timer.function = zfcp_erp_timeout_handler;
  49         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  50         fsf_req->timer.expires = jiffies + 30 * HZ;
  51         add_timer(&fsf_req->timer);
  52 }
  53
  54 /* association between FSF command and FSF QTCB type */
  55 static u32 fsf_qtcb_type[] = {
  56         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  57         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  61         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  62         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  63         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  64         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  65         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  66         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  67         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  68         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  69 };
  70
  71 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  72 {
  73         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  74                 "operational because of an unsupported FC class\n");
  75         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  76         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  77 }
  78
  79 /**
  80  * zfcp_fsf_req_free - free memory used by fsf request
  81  * @fsf_req: pointer to struct zfcp_fsf_req
  82  */
  83 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  84 {
  85         if (likely(req->pool)) {
  86                 if (likely(req->qtcb))
  87                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  88                 mempool_free(req, req->pool);
  89                 return;
  90         }
  91
  92         if (likely(req->qtcb))
  93                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  94         kfree(req);
  95 }
  96
  97 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  98 {
  99         unsigned long flags;
 100         struct fsf_status_read_buffer *sr_buf = req->data;
 101         struct zfcp_adapter *adapter = req->adapter;
 102         struct zfcp_port *port;
 103         int d_id = ntoh24(sr_buf->d_id);
 104
 105         read_lock_irqsave(&adapter->port_list_lock, flags);
 106         list_for_each_entry(port, &adapter->port_list, list)
 107                 if (port->d_id == d_id) {
 108                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 109                         break;
 110                 }
 111         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 112 }
 113
 114 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 115                                          struct fsf_link_down_info *link_down)
 116 {
 117         struct zfcp_adapter *adapter = req->adapter;
 118
 119         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 120                 return;
 121
 122         atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 123
 124         zfcp_scsi_schedule_rports_block(adapter);
 125
 126         if (!link_down)
 127                 goto out;
 128
 129         switch (link_down->error_code) {
 130         case FSF_PSQ_LINK_NO_LIGHT:
 131                 dev_warn(&req->adapter->ccw_device->dev,
 132                          "There is no light signal from the local "
 133                          "fibre channel cable\n");
 134                 break;
 135         case FSF_PSQ_LINK_WRAP_PLUG:
 136                 dev_warn(&req->adapter->ccw_device->dev,
 137                          "There is a wrap plug instead of a fibre "
 138                          "channel cable\n");
 139                 break;
 140         case FSF_PSQ_LINK_NO_FCP:
 141                 dev_warn(&req->adapter->ccw_device->dev,
 142                          "The adjacent fibre channel node does not "
 143                          "support FCP\n");
 144                 break;
 145         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 146                 dev_warn(&req->adapter->ccw_device->dev,
 147                          "The FCP device is suspended because of a "
 148                          "firmware update\n");
 149                 break;
 150         case FSF_PSQ_LINK_INVALID_WWPN:
 151                 dev_warn(&req->adapter->ccw_device->dev,
 152                          "The FCP device detected a WWPN that is "
 153                          "duplicate or not valid\n");
 154                 break;
 155         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 156                 dev_warn(&req->adapter->ccw_device->dev,
 157                          "The fibre channel fabric does not support NPIV\n");
 158                 break;
 159         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 160                 dev_warn(&req->adapter->ccw_device->dev,
 161                          "The FCP adapter cannot support more NPIV ports\n");
 162                 break;
 163         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "The adjacent switch cannot support "
 166                          "more NPIV ports\n");
 167                 break;
 168         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The FCP adapter could not log in to the "
 171                          "fibre channel fabric\n");
 172                 break;
 173         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The WWPN assignment file on the FCP adapter "
 176                          "has been damaged\n");
 177                 break;
 178         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "The mode table on the FCP adapter "
 181                          "has been damaged\n");
 182                 break;
 183         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "All NPIV ports on the FCP adapter have "
 186                          "been assigned\n");
 187                 break;
 188         default:
 189                 dev_warn(&req->adapter->ccw_device->dev,
 190                          "The link between the FCP adapter and "
 191                          "the FC fabric is down\n");
 192         }
 193 out:
 194         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 195 }
 196
 197 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 198 {
 199         struct fsf_status_read_buffer *sr_buf = req->data;
 200         struct fsf_link_down_info *ldi =
 201                 (struct fsf_link_down_info *) &sr_buf->payload;
 202
 203         switch (sr_buf->status_subtype) {
 204         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 205                 zfcp_fsf_link_down_info_eval(req, ldi);
 206                 break;
 207         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 208                 zfcp_fsf_link_down_info_eval(req, ldi);
 209                 break;
 210         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 211                 zfcp_fsf_link_down_info_eval(req, NULL);
 212         }
 213 }
 214
 215 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 216 {
 217         struct zfcp_adapter *adapter = req->adapter;
 218         struct fsf_status_read_buffer *sr_buf = req->data;
 219
 220         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 221                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 222                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 223                 zfcp_fsf_req_free(req);
 224                 return;
 225         }
 226
 227         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 228
 229         switch (sr_buf->status_type) {
 230         case FSF_STATUS_READ_PORT_CLOSED:
 231                 zfcp_fsf_status_read_port_closed(req);
 232                 break;
 233         case FSF_STATUS_READ_INCOMING_ELS:
 234                 zfcp_fc_incoming_els(req);
 235                 break;
 236         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 237                 break;
 238         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 239                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 240                 if (ber_stop) {
 241                         dev_warn(&adapter->ccw_device->dev,
 242                                  "All paths over this FCP device are disused because of excessive bit errors\n");
 243                         zfcp_erp_adapter_shutdown(adapter, 0, "fssrh_b");
 244                 } else {
 245                         dev_warn(&adapter->ccw_device->dev,
 246                                  "The error threshold for checksum statistics has been exceeded\n");
 247                 }
 248                 break;
 249         case FSF_STATUS_READ_LINK_DOWN:
 250                 zfcp_fsf_status_read_link_down(req);
 251                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 252                 break;
 253         case FSF_STATUS_READ_LINK_UP:
 254                 dev_info(&adapter->ccw_device->dev,
 255                          "The local link has been restored\n");
 256                 /* All ports should be marked as ready to run again */
 257                 zfcp_erp_set_adapter_status(adapter,
 258                                             ZFCP_STATUS_COMMON_RUNNING);
 259                 zfcp_erp_adapter_reopen(adapter,
 260                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 261                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 262                                         "fssrh_2");
 263                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 264
 265                 break;
 266         case FSF_STATUS_READ_NOTIFICATION_LOST:
 267                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 268                         zfcp_fc_conditional_port_scan(adapter);
 269                 break;
 270         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 271                 adapter->adapter_features = sr_buf->payload.word[0];
 272                 break;
 273         }
 274
 275         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 276         zfcp_fsf_req_free(req);
 277
 278         atomic_inc(&adapter->stat_miss);
 279         queue_work(adapter->work_queue, &adapter->stat_work);
 280 }
 281
 282 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 283 {
 284         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 285         case FSF_SQ_FCP_RSP_AVAILABLE:
 286         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 287         case FSF_SQ_NO_RETRY_POSSIBLE:
 288         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 289                 return;
 290         case FSF_SQ_COMMAND_ABORTED:
 291                 break;
 292         case FSF_SQ_NO_RECOM:
 293                 dev_err(&req->adapter->ccw_device->dev,
 294                         "The FCP adapter reported a problem "
 295                         "that cannot be recovered\n");
 296                 zfcp_qdio_siosl(req->adapter);
 297                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 298                 break;
 299         }
 300         /* all non-return stats set FSFREQ_ERROR*/
 301         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 302 }
 303
 304 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 305 {
 306         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 307                 return;
 308
 309         switch (req->qtcb->header.fsf_status) {
 310         case FSF_UNKNOWN_COMMAND:
 311                 dev_err(&req->adapter->ccw_device->dev,
 312                         "The FCP adapter does not recognize the command 0x%x\n",
 313                         req->qtcb->header.fsf_command);
 314                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 315                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 316                 break;
 317         case FSF_ADAPTER_STATUS_AVAILABLE:
 318                 zfcp_fsf_fsfstatus_qual_eval(req);
 319                 break;
 320         }
 321 }
 322
 323 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 324 {
 325         struct zfcp_adapter *adapter = req->adapter;
 326         struct fsf_qtcb *qtcb = req->qtcb;
 327         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 328
 329         zfcp_dbf_hba_fsf_response(req);
 330
 331         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 332                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 333                 return;
 334         }
 335
 336         switch (qtcb->prefix.prot_status) {
 337         case FSF_PROT_GOOD:
 338         case FSF_PROT_FSF_STATUS_PRESENTED:
 339                 return;
 340         case FSF_PROT_QTCB_VERSION_ERROR:
 341                 dev_err(&adapter->ccw_device->dev,
 342                         "QTCB version 0x%x not supported by FCP adapter "
 343                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 344                         psq->word[0], psq->word[1]);
 345                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 346                 break;
 347         case FSF_PROT_ERROR_STATE:
 348         case FSF_PROT_SEQ_NUMB_ERROR:
 349                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 350                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 351                 break;
 352         case FSF_PROT_UNSUPP_QTCB_TYPE:
 353                 dev_err(&adapter->ccw_device->dev,
 354                         "The QTCB type is not supported by the FCP adapter\n");
 355                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 356                 break;
 357         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 358                 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 359                                 &adapter->status);
 360                 break;
 361         case FSF_PROT_DUPLICATE_REQUEST_ID:
 362                 dev_err(&adapter->ccw_device->dev,
 363                         "0x%Lx is an ambiguous request identifier\n",
 364                         (unsigned long long)qtcb->bottom.support.req_handle);
 365                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 366                 break;
 367         case FSF_PROT_LINK_DOWN:
 368                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 369                 /* go through reopen to flush pending requests */
 370                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 371                 break;
 372         case FSF_PROT_REEST_QUEUE:
 373                 /* All ports should be marked as ready to run again */
 374                 zfcp_erp_set_adapter_status(adapter,
 375                                             ZFCP_STATUS_COMMON_RUNNING);
 376                 zfcp_erp_adapter_reopen(adapter,
 377                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 378                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 379                                         "fspse_8");
 380                 break;
 381         default:
 382                 dev_err(&adapter->ccw_device->dev,
 383                         "0x%x is not a valid transfer protocol status\n",
 384                         qtcb->prefix.prot_status);
 385                 zfcp_qdio_siosl(adapter);
 386                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 387         }
 388         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 389 }
 390
 391 /**
 392  * zfcp_fsf_req_complete - process completion of a FSF request
 393  * @fsf_req: The FSF request that has been completed.
 394  *
 395  * When a request has been completed either from the FCP adapter,
 396  * or it has been dismissed due to a queue shutdown, this function
 397  * is called to process the completion status and trigger further
 398  * events related to the FSF request.
 399  */
 400 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 401 {
 402         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 403                 zfcp_fsf_status_read_handler(req);
 404                 return;
 405         }
 406
 407         del_timer(&req->timer);
 408         zfcp_fsf_protstatus_eval(req);
 409         zfcp_fsf_fsfstatus_eval(req);
 410         req->handler(req);
 411
 412         if (req->erp_action)
 413                 zfcp_erp_notify(req->erp_action, 0);
 414
 415         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 416                 zfcp_fsf_req_free(req);
 417         else
 418                 complete(&req->completion);
 419 }
 420
 421 /**
 422  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 423  * @adapter: pointer to struct zfcp_adapter
 424  *
 425  * Never ever call this without shutting down the adapter first.
 426  * Otherwise the adapter would continue using and corrupting s390 storage.
 427  * Included BUG_ON() call to ensure this is done.
 428  * ERP is supposed to be the only user of this function.
 429  */
 430 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 431 {
 432         struct zfcp_fsf_req *req, *tmp;
 433         LIST_HEAD(remove_queue);
 434
 435         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 436         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 437
 438         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 439                 list_del(&req->list);
 440                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 441                 zfcp_fsf_req_complete(req);
 442         }
 443 }
 444
 445 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 446 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 447 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 448 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 449 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 450 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 451 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 452
 453 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 454 {
 455         u32 fdmi_speed = 0;
 456         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 457                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 458         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 459                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 460         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 461                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 462         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 463                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 464         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 465                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 466         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 467                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 468         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 469                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 470         return fdmi_speed;
 471 }
 472
 473 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 474 {
 475         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 476         struct zfcp_adapter *adapter = req->adapter;
 477         struct Scsi_Host *shost = adapter->scsi_host;
 478         struct fc_els_flogi *nsp, *plogi;
 479
 480         /* adjust pointers for missing command code */
 481         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 482                                         - sizeof(u32));
 483         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 484                                         - sizeof(u32));
 485
 486         if (req->data)
 487                 memcpy(req->data, bottom, sizeof(*bottom));
 488
 489         fc_host_port_name(shost) = nsp->fl_wwpn;
 490         fc_host_node_name(shost) = nsp->fl_wwnn;
 491         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 492
 493         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 494         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 495                                          (u16)FSF_STATUS_READS_RECOM);
 496
 497         if (fc_host_permanent_port_name(shost) == -1)
 498                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 499
 500         zfcp_scsi_set_prot(adapter);
 501
 502         /* no error return above here, otherwise must fix call chains */
 503         /* do not evaluate invalid fields */
 504         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
 505                 return 0;
 506
 507         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 508         fc_host_speed(shost) =
 509                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
 510
 511         adapter->hydra_version = bottom->adapter_type;
 512
 513         switch (bottom->fc_topology) {
 514         case FSF_TOPO_P2P:
 515                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 516                 adapter->peer_wwpn = plogi->fl_wwpn;
 517                 adapter->peer_wwnn = plogi->fl_wwnn;
 518                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 519                 break;
 520         case FSF_TOPO_FABRIC:
 521                 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
 522                         fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 523                 else
 524                         fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 525                 break;
 526         case FSF_TOPO_AL:
 527                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 528                 /* fall through */
 529         default:
 530                 dev_err(&adapter->ccw_device->dev,
 531                         "Unknown or unsupported arbitrated loop "
 532                         "fibre channel topology detected\n");
 533                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 534                 return -EIO;
 535         }
 536
 537         return 0;
 538 }
 539
 540 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 541 {
 542         struct zfcp_adapter *adapter = req->adapter;
 543         struct fsf_qtcb *qtcb = req->qtcb;
 544         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 545         struct Scsi_Host *shost = adapter->scsi_host;
 546
 547         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 548                 return;
 549
 550         adapter->fsf_lic_version = bottom->lic_version;
 551         adapter->adapter_features = bottom->adapter_features;
 552         adapter->connection_features = bottom->connection_features;
 553         adapter->peer_wwpn = 0;
 554         adapter->peer_wwnn = 0;
 555         adapter->peer_d_id = 0;
 556
 557         switch (qtcb->header.fsf_status) {
 558         case FSF_GOOD:
 559                 if (zfcp_fsf_exchange_config_evaluate(req))
 560                         return;
 561
 562                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 563                         dev_err(&adapter->ccw_device->dev,
 564                                 "FCP adapter maximum QTCB size (%d bytes) "
 565                                 "is too small\n",
 566                                 bottom->max_qtcb_size);
 567                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 568                         return;
 569                 }
 570                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 571                                 &adapter->status);
 572                 break;
 573         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 574                 fc_host_node_name(shost) = 0;
 575                 fc_host_port_name(shost) = 0;
 576                 fc_host_port_id(shost) = 0;
 577                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 578                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 579                 adapter->hydra_version = 0;
 580
 581                 /* avoids adapter shutdown to be able to recognize
 582                  * events such as LINK UP */
 583                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 584                                 &adapter->status);
 585                 zfcp_fsf_link_down_info_eval(req,
 586                         &qtcb->header.fsf_status_qual.link_down_info);
 587                 if (zfcp_fsf_exchange_config_evaluate(req))
 588                         return;
 589                 break;
 590         default:
 591                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 592                 return;
 593         }
 594
 595         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 596                 adapter->hardware_version = bottom->hardware_version;
 597                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 598                        min(FC_SERIAL_NUMBER_SIZE, 17));
 599                 EBCASC(fc_host_serial_number(shost),
 600                        min(FC_SERIAL_NUMBER_SIZE, 17));
 601         }
 602
 603         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 604                 dev_err(&adapter->ccw_device->dev,
 605                         "The FCP adapter only supports newer "
 606                         "control block versions\n");
 607                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 608                 return;
 609         }
 610         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 611                 dev_err(&adapter->ccw_device->dev,
 612                         "The FCP adapter only supports older "
 613                         "control block versions\n");
 614                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 615         }
 616 }
 617
 618 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 619 {
 620         struct zfcp_adapter *adapter = req->adapter;
 621         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 622         struct Scsi_Host *shost = adapter->scsi_host;
 623
 624         if (req->data)
 625                 memcpy(req->data, bottom, sizeof(*bottom));
 626
 627         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 628                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 629         } else
 630                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 631         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 632         fc_host_supported_speeds(shost) =
 633                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
 634         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 635                FC_FC4_LIST_SIZE);
 636         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 637                FC_FC4_LIST_SIZE);
 638 }
 639
 640 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 641 {
 642         struct fsf_qtcb *qtcb = req->qtcb;
 643
 644         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 645                 return;
 646
 647         switch (qtcb->header.fsf_status) {
 648         case FSF_GOOD:
 649                 zfcp_fsf_exchange_port_evaluate(req);
 650                 break;
 651         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 652                 zfcp_fsf_exchange_port_evaluate(req);
 653                 zfcp_fsf_link_down_info_eval(req,
 654                         &qtcb->header.fsf_status_qual.link_down_info);
 655                 break;
 656         }
 657 }
 658
 659 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 660 {
 661         struct zfcp_fsf_req *req;
 662
 663         if (likely(pool))
 664                 req = mempool_alloc(pool, GFP_ATOMIC);
 665         else
 666                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 667
 668         if (unlikely(!req))
 669                 return NULL;
 670
 671         memset(req, 0, sizeof(*req));
 672         req->pool = pool;
 673         return req;
 674 }
 675
 676 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 677 {
 678         struct fsf_qtcb *qtcb;
 679
 680         if (likely(pool))
 681                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 682         else
 683                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 684
 685         if (unlikely(!qtcb))
 686                 return NULL;
 687
 688         memset(qtcb, 0, sizeof(*qtcb));
 689         return qtcb;
 690 }
 691
 692 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 693                                                 u32 fsf_cmd, u8 sbtype,
 694                                                 mempool_t *pool)
 695 {
 696         struct zfcp_adapter *adapter = qdio->adapter;
 697         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 698
 699         if (unlikely(!req))
 700                 return ERR_PTR(-ENOMEM);
 701
 702         if (adapter->req_no == 0)
 703                 adapter->req_no++;
 704
 705         INIT_LIST_HEAD(&req->list);
 706         init_timer(&req->timer);
 707         init_completion(&req->completion);
 708
 709         req->adapter = adapter;
 710         req->fsf_command = fsf_cmd;
 711         req->req_id = adapter->req_no;
 712
 713         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 714                 if (likely(pool))
 715                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 716                 else
 717                         req->qtcb = zfcp_qtcb_alloc(NULL);
 718
 719                 if (unlikely(!req->qtcb)) {
 720                         zfcp_fsf_req_free(req);
 721                         return ERR_PTR(-ENOMEM);
 722                 }
 723
 724                 req->seq_no = adapter->fsf_req_seq_no;
 725                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 726                 req->qtcb->prefix.req_id = req->req_id;
 727                 req->qtcb->prefix.ulp_info = 26;
 728                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 729                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 730                 req->qtcb->header.req_handle = req->req_id;
 731                 req->qtcb->header.fsf_command = req->fsf_command;
 732         }
 733
 734         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 735                            req->qtcb, sizeof(struct fsf_qtcb));
 736
 737         return req;
 738 }
 739
 740 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 741 {
 742         struct zfcp_adapter *adapter = req->adapter;
 743         struct zfcp_qdio *qdio = adapter->qdio;
 744         int with_qtcb = (req->qtcb != NULL);
 745         int req_id = req->req_id;
 746
 747         zfcp_reqlist_add(adapter->req_list, req);
 748
 749         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 750         req->issued = get_tod_clock();
 751         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 752                 del_timer(&req->timer);
 753                 /* lookup request again, list might have changed */
 754                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 755                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 756                 return -EIO;
 757         }
 758
 759         /* Don't increase for unsolicited status */
 760         if (with_qtcb)
 761                 adapter->fsf_req_seq_no++;
 762         adapter->req_no++;
 763
 764         return 0;
 765 }
 766
 767 /**
 768  * zfcp_fsf_status_read - send status read request
 769  * @adapter: pointer to struct zfcp_adapter
 770  * @req_flags: request flags
 771  * Returns: 0 on success, ERROR otherwise
 772  */
 773 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 774 {
 775         struct zfcp_adapter *adapter = qdio->adapter;
 776         struct zfcp_fsf_req *req;
 777         struct fsf_status_read_buffer *sr_buf;
 778         struct page *page;
 779         int retval = -EIO;
 780
 781         spin_lock_irq(&qdio->req_q_lock);
 782         if (zfcp_qdio_sbal_get(qdio))
 783                 goto out;
 784
 785         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 786                                   SBAL_SFLAGS0_TYPE_STATUS,
 787                                   adapter->pool.status_read_req);
 788         if (IS_ERR(req)) {
 789                 retval = PTR_ERR(req);
 790                 goto out;
 791         }
 792
 793         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 794         if (!page) {
 795                 retval = -ENOMEM;
 796                 goto failed_buf;
 797         }
 798         sr_buf = page_address(page);
 799         memset(sr_buf, 0, sizeof(*sr_buf));
 800         req->data = sr_buf;
 801
 802         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 803         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 804
 805         retval = zfcp_fsf_req_send(req);
 806         if (retval)
 807                 goto failed_req_send;
 808
 809         goto out;
 810
 811 failed_req_send:
 812         req->data = NULL;
 813         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 814 failed_buf:
 815         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 816         zfcp_fsf_req_free(req);
 817 out:
 818         spin_unlock_irq(&qdio->req_q_lock);
 819         return retval;
 820 }
 821
 822 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 823 {
 824         struct scsi_device *sdev = req->data;
 825         struct zfcp_scsi_dev *zfcp_sdev;
 826         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 827
 828         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 829                 return;
 830
 831         zfcp_sdev = sdev_to_zfcp(sdev);
 832
 833         switch (req->qtcb->header.fsf_status) {
 834         case FSF_PORT_HANDLE_NOT_VALID:
 835                 if (fsq->word[0] == fsq->word[1]) {
 836                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 837                                                 "fsafch1");
 838                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 839                 }
 840                 break;
 841         case FSF_LUN_HANDLE_NOT_VALID:
 842                 if (fsq->word[0] == fsq->word[1]) {
 843                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 844                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 845                 }
 846                 break;
 847         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 848                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 849                 break;
 850         case FSF_PORT_BOXED:
 851                 zfcp_erp_set_port_status(zfcp_sdev->port,
 852                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 853                 zfcp_erp_port_reopen(zfcp_sdev->port,
 854                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 855                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 856                 break;
 857         case FSF_LUN_BOXED:
 858                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 859                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 860                                     "fsafch4");
 861                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 862                 break;
 863         case FSF_ADAPTER_STATUS_AVAILABLE:
 864                 switch (fsq->word[0]) {
 865                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 866                         zfcp_fc_test_link(zfcp_sdev->port);
 867                         /* fall through */
 868                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 869                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 870                         break;
 871                 }
 872                 break;
 873         case FSF_GOOD:
 874                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 875                 break;
 876         }
 877 }
 878
 879 /**
 880  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 881  * @scmnd: The SCSI command to abort
 882  * Returns: pointer to struct zfcp_fsf_req
 883  */
 884
 885 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 886 {
 887         struct zfcp_fsf_req *req = NULL;
 888         struct scsi_device *sdev = scmnd->device;
 889         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 890         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 891         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 892
 893         spin_lock_irq(&qdio->req_q_lock);
 894         if (zfcp_qdio_sbal_get(qdio))
 895                 goto out;
 896         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 897                                   SBAL_SFLAGS0_TYPE_READ,
 898                                   qdio->adapter->pool.scsi_abort);
 899         if (IS_ERR(req)) {
 900                 req = NULL;
 901                 goto out;
 902         }
 903
 904         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 905                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 906                 goto out_error_free;
 907
 908         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 909
 910         req->data = sdev;
 911         req->handler = zfcp_fsf_abort_fcp_command_handler;
 912         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 913         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 914         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 915
 916         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 917         if (!zfcp_fsf_req_send(req))
 918                 goto out;
 919
 920 out_error_free:
 921         zfcp_fsf_req_free(req);
 922         req = NULL;
 923 out:
 924         spin_unlock_irq(&qdio->req_q_lock);
 925         return req;
 926 }
 927
 928 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 929 {
 930         struct zfcp_adapter *adapter = req->adapter;
 931         struct zfcp_fsf_ct_els *ct = req->data;
 932         struct fsf_qtcb_header *header = &req->qtcb->header;
 933
 934         ct->status = -EINVAL;
 935
 936         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 937                 goto skip_fsfstatus;
 938
 939         switch (header->fsf_status) {
 940         case FSF_GOOD:
 941                 ct->status = 0;
 942                 zfcp_dbf_san_res("fsscth2", req);
 943                 break;
 944         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 945                 zfcp_fsf_class_not_supp(req);
 946                 break;
 947         case FSF_ADAPTER_STATUS_AVAILABLE:
 948                 switch (header->fsf_status_qual.word[0]){
 949                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 950                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 951                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 952                         break;
 953                 }
 954                 break;
 955         case FSF_PORT_BOXED:
 956                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 957                 break;
 958         case FSF_PORT_HANDLE_NOT_VALID:
 959                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 960                 /* fall through */
 961         case FSF_GENERIC_COMMAND_REJECTED:
 962         case FSF_PAYLOAD_SIZE_MISMATCH:
 963         case FSF_REQUEST_SIZE_TOO_LARGE:
 964         case FSF_RESPONSE_SIZE_TOO_LARGE:
 965         case FSF_SBAL_MISMATCH:
 966                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 967                 break;
 968         }
 969
 970 skip_fsfstatus:
 971         if (ct->handler)
 972                 ct->handler(ct->handler_data);
 973 }
 974
 975 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 976                                             struct zfcp_qdio_req *q_req,
 977                                             struct scatterlist *sg_req,
 978                                             struct scatterlist *sg_resp)
 979 {
 980         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 981         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 982         zfcp_qdio_set_sbale_last(qdio, q_req);
 983 }
 984
 985 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 986                                        struct scatterlist *sg_req,
 987                                        struct scatterlist *sg_resp)
 988 {
 989         struct zfcp_adapter *adapter = req->adapter;
 990         struct zfcp_qdio *qdio = adapter->qdio;
 991         struct fsf_qtcb *qtcb = req->qtcb;
 992         u32 feat = adapter->adapter_features;
 993
 994         if (zfcp_adapter_multi_buffer_active(adapter)) {
 995                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 996                         return -EIO;
 997                 qtcb->bottom.support.req_buf_length =
 998                         zfcp_qdio_real_bytes(sg_req);
 999                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1000                         return -EIO;
1001                 qtcb->bottom.support.resp_buf_length =
1002                         zfcp_qdio_real_bytes(sg_resp);
1003
1004                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
1005                                         zfcp_qdio_sbale_count(sg_req));
1006                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1007                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
1008                 return 0;
1009         }
1010
1011         /* use single, unchained SBAL if it can hold the request */
1012         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1013                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1014                                                 sg_req, sg_resp);
1015                 return 0;
1016         }
1017
1018         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1019                 return -EOPNOTSUPP;
1020
1021         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1022                 return -EIO;
1023
1024         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1025
1026         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1027         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1028
1029         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1030                 return -EIO;
1031
1032         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1033
1034         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1035
1036         return 0;
1037 }
1038
1039 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1040                                  struct scatterlist *sg_req,
1041                                  struct scatterlist *sg_resp,
1042                                  unsigned int timeout)
1043 {
1044         int ret;
1045
1046         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1047         if (ret)
1048                 return ret;
1049
1050         /* common settings for ct/gs and els requests */
1051         if (timeout > 255)
1052                 timeout = 255; /* max value accepted by hardware */
1053         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1054         req->qtcb->bottom.support.timeout = timeout;
1055         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1056
1057         return 0;
1058 }
1059
1060 /**
1061  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1062  * @ct: pointer to struct zfcp_send_ct with data for request
1063  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1064  */
1065 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1066                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1067                      unsigned int timeout)
1068 {
1069         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1070         struct zfcp_fsf_req *req;
1071         int ret = -EIO;
1072
1073         spin_lock_irq(&qdio->req_q_lock);
1074         if (zfcp_qdio_sbal_get(qdio))
1075                 goto out;
1076
1077         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1078                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1079
1080         if (IS_ERR(req)) {
1081                 ret = PTR_ERR(req);
1082                 goto out;
1083         }
1084
1085         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1086         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1087         if (ret)
1088                 goto failed_send;
1089
1090         req->handler = zfcp_fsf_send_ct_handler;
1091         req->qtcb->header.port_handle = wka_port->handle;
1092         ct->d_id = wka_port->d_id;
1093         req->data = ct;
1094
1095         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1096
1097         ret = zfcp_fsf_req_send(req);
1098         if (ret)
1099                 goto failed_send;
1100
1101         goto out;
1102
1103 failed_send:
1104         zfcp_fsf_req_free(req);
1105 out:
1106         spin_unlock_irq(&qdio->req_q_lock);
1107         return ret;
1108 }
1109
1110 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1111 {
1112         struct zfcp_fsf_ct_els *send_els = req->data;
1113         struct fsf_qtcb_header *header = &req->qtcb->header;
1114
1115         send_els->status = -EINVAL;
1116
1117         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1118                 goto skip_fsfstatus;
1119
1120         switch (header->fsf_status) {
1121         case FSF_GOOD:
1122                 send_els->status = 0;
1123                 zfcp_dbf_san_res("fsselh1", req);
1124                 break;
1125         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1126                 zfcp_fsf_class_not_supp(req);
1127                 break;
1128         case FSF_ADAPTER_STATUS_AVAILABLE:
1129                 switch (header->fsf_status_qual.word[0]){
1130                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1131                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1132                 case FSF_SQ_RETRY_IF_POSSIBLE:
1133                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1134                         break;
1135                 }
1136                 break;
1137         case FSF_ELS_COMMAND_REJECTED:
1138         case FSF_PAYLOAD_SIZE_MISMATCH:
1139         case FSF_REQUEST_SIZE_TOO_LARGE:
1140         case FSF_RESPONSE_SIZE_TOO_LARGE:
1141                 break;
1142         case FSF_SBAL_MISMATCH:
1143                 /* should never occur, avoided in zfcp_fsf_send_els */
1144                 /* fall through */
1145         default:
1146                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1147                 break;
1148         }
1149 skip_fsfstatus:
1150         if (send_els->handler)
1151                 send_els->handler(send_els->handler_data);
1152 }
1153
1154 /**
1155  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1156  * @els: pointer to struct zfcp_send_els with data for the command
1157  */
1158 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1159                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1160 {
1161         struct zfcp_fsf_req *req;
1162         struct zfcp_qdio *qdio = adapter->qdio;
1163         int ret = -EIO;
1164
1165         spin_lock_irq(&qdio->req_q_lock);
1166         if (zfcp_qdio_sbal_get(qdio))
1167                 goto out;
1168
1169         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1170                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1171
1172         if (IS_ERR(req)) {
1173                 ret = PTR_ERR(req);
1174                 goto out;
1175         }
1176
1177         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1178
1179         if (!zfcp_adapter_multi_buffer_active(adapter))
1180                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1181
1182         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1183
1184         if (ret)
1185                 goto failed_send;
1186
1187         hton24(req->qtcb->bottom.support.d_id, d_id);
1188         req->handler = zfcp_fsf_send_els_handler;
1189         els->d_id = d_id;
1190         req->data = els;
1191
1192         zfcp_dbf_san_req("fssels1", req, d_id);
1193
1194         ret = zfcp_fsf_req_send(req);
1195         if (ret)
1196                 goto failed_send;
1197
1198         goto out;
1199
1200 failed_send:
1201         zfcp_fsf_req_free(req);
1202 out:
1203         spin_unlock_irq(&qdio->req_q_lock);
1204         return ret;
1205 }
1206
1207 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1208 {
1209         struct zfcp_fsf_req *req;
1210         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1211         int retval = -EIO;
1212
1213         spin_lock_irq(&qdio->req_q_lock);
1214         if (zfcp_qdio_sbal_get(qdio))
1215                 goto out;
1216
1217         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1218                                   SBAL_SFLAGS0_TYPE_READ,
1219                                   qdio->adapter->pool.erp_req);
1220
1221         if (IS_ERR(req)) {
1222                 retval = PTR_ERR(req);
1223                 goto out;
1224         }
1225
1226         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1227         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1228
1229         req->qtcb->bottom.config.feature_selection =
1230                         FSF_FEATURE_NOTIFICATION_LOST |
1231                         FSF_FEATURE_UPDATE_ALERT;
1232         req->erp_action = erp_action;
1233         req->handler = zfcp_fsf_exchange_config_data_handler;
1234         erp_action->fsf_req_id = req->req_id;
1235
1236         zfcp_fsf_start_erp_timer(req);
1237         retval = zfcp_fsf_req_send(req);
1238         if (retval) {
1239                 zfcp_fsf_req_free(req);
1240                 erp_action->fsf_req_id = 0;
1241         }
1242 out:
1243         spin_unlock_irq(&qdio->req_q_lock);
1244         return retval;
1245 }
1246
1247 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1248                                        struct fsf_qtcb_bottom_config *data)
1249 {
1250         struct zfcp_fsf_req *req = NULL;
1251         int retval = -EIO;
1252
1253         spin_lock_irq(&qdio->req_q_lock);
1254         if (zfcp_qdio_sbal_get(qdio))
1255                 goto out_unlock;
1256
1257         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1258                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1259
1260         if (IS_ERR(req)) {
1261                 retval = PTR_ERR(req);
1262                 goto out_unlock;
1263         }
1264
1265         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1266         req->handler = zfcp_fsf_exchange_config_data_handler;
1267
1268         req->qtcb->bottom.config.feature_selection =
1269                         FSF_FEATURE_NOTIFICATION_LOST |
1270                         FSF_FEATURE_UPDATE_ALERT;
1271
1272         if (data)
1273                 req->data = data;
1274
1275         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1276         retval = zfcp_fsf_req_send(req);
1277         spin_unlock_irq(&qdio->req_q_lock);
1278         if (!retval)
1279                 wait_for_completion(&req->completion);
1280
1281         zfcp_fsf_req_free(req);
1282         return retval;
1283
1284 out_unlock:
1285         spin_unlock_irq(&qdio->req_q_lock);
1286         return retval;
1287 }
1288
1289 /**
1290  * zfcp_fsf_exchange_port_data - request information about local port
1291  * @erp_action: ERP action for the adapter for which port data is requested
1292  * Returns: 0 on success, error otherwise
1293  */
1294 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1295 {
1296         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1297         struct zfcp_fsf_req *req;
1298         int retval = -EIO;
1299
1300         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1301                 return -EOPNOTSUPP;
1302
1303         spin_lock_irq(&qdio->req_q_lock);
1304         if (zfcp_qdio_sbal_get(qdio))
1305                 goto out;
1306
1307         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1308                                   SBAL_SFLAGS0_TYPE_READ,
1309                                   qdio->adapter->pool.erp_req);
1310
1311         if (IS_ERR(req)) {
1312                 retval = PTR_ERR(req);
1313                 goto out;
1314         }
1315
1316         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1317         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1318
1319         req->handler = zfcp_fsf_exchange_port_data_handler;
1320         req->erp_action = erp_action;
1321         erp_action->fsf_req_id = req->req_id;
1322
1323         zfcp_fsf_start_erp_timer(req);
1324         retval = zfcp_fsf_req_send(req);
1325         if (retval) {
1326                 zfcp_fsf_req_free(req);
1327                 erp_action->fsf_req_id = 0;
1328         }
1329 out:
1330         spin_unlock_irq(&qdio->req_q_lock);
1331         return retval;
1332 }
1333
1334 /**
1335  * zfcp_fsf_exchange_port_data_sync - request information about local port
1336  * @qdio: pointer to struct zfcp_qdio
1337  * @data: pointer to struct fsf_qtcb_bottom_port
1338  * Returns: 0 on success, error otherwise
1339  */
1340 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1341                                      struct fsf_qtcb_bottom_port *data)
1342 {
1343         struct zfcp_fsf_req *req = NULL;
1344         int retval = -EIO;
1345
1346         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1347                 return -EOPNOTSUPP;
1348
1349         spin_lock_irq(&qdio->req_q_lock);
1350         if (zfcp_qdio_sbal_get(qdio))
1351                 goto out_unlock;
1352
1353         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1354                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1355
1356         if (IS_ERR(req)) {
1357                 retval = PTR_ERR(req);
1358                 goto out_unlock;
1359         }
1360
1361         if (data)
1362                 req->data = data;
1363
1364         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1365
1366         req->handler = zfcp_fsf_exchange_port_data_handler;
1367         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1368         retval = zfcp_fsf_req_send(req);
1369         spin_unlock_irq(&qdio->req_q_lock);
1370
1371         if (!retval)
1372                 wait_for_completion(&req->completion);
1373
1374         zfcp_fsf_req_free(req);
1375
1376         return retval;
1377
1378 out_unlock:
1379         spin_unlock_irq(&qdio->req_q_lock);
1380         return retval;
1381 }
1382
1383 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1384 {
1385         struct zfcp_port *port = req->data;
1386         struct fsf_qtcb_header *header = &req->qtcb->header;
1387         struct fc_els_flogi *plogi;
1388
1389         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1390                 goto out;
1391
1392         switch (header->fsf_status) {
1393         case FSF_PORT_ALREADY_OPEN:
1394                 break;
1395         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1396                 dev_warn(&req->adapter->ccw_device->dev,
1397                          "Not enough FCP adapter resources to open "
1398                          "remote port 0x%016Lx\n",
1399                          (unsigned long long)port->wwpn);
1400                 zfcp_erp_set_port_status(port,
1401                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1402                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1403                 break;
1404         case FSF_ADAPTER_STATUS_AVAILABLE:
1405                 switch (header->fsf_status_qual.word[0]) {
1406                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1407                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1408                 case FSF_SQ_NO_RETRY_POSSIBLE:
1409                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1410                         break;
1411                 }
1412                 break;
1413         case FSF_GOOD:
1414                 port->handle = header->port_handle;
1415                 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1416                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1417                 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1418                                   &port->status);
1419                 /* check whether D_ID has changed during open */
1420                 /*
1421                  * FIXME: This check is not airtight, as the FCP channel does
1422                  * not monitor closures of target port connections caused on
1423                  * the remote side. Thus, they might miss out on invalidating
1424                  * locally cached WWPNs (and other N_Port parameters) of gone
1425                  * target ports. So, our heroic attempt to make things safe
1426                  * could be undermined by 'open port' response data tagged with
1427                  * obsolete WWPNs. Another reason to monitor potential
1428                  * connection closures ourself at least (by interpreting
1429                  * incoming ELS' and unsolicited status). It just crosses my
1430                  * mind that one should be able to cross-check by means of
1431                  * another GID_PN straight after a port has been opened.
1432                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1433                  */
1434                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1435                 if (req->qtcb->bottom.support.els1_length >=
1436                     FSF_PLOGI_MIN_LEN)
1437                                 zfcp_fc_plogi_evaluate(port, plogi);
1438                 break;
1439         case FSF_UNKNOWN_OP_SUBTYPE:
1440                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1441                 break;
1442         }
1443
1444 out:
1445         put_device(&port->dev);
1446 }
1447
1448 /**
1449  * zfcp_fsf_open_port - create and send open port request
1450  * @erp_action: pointer to struct zfcp_erp_action
1451  * Returns: 0 on success, error otherwise
1452  */
1453 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1454 {
1455         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1456         struct zfcp_port *port = erp_action->port;
1457         struct zfcp_fsf_req *req;
1458         int retval = -EIO;
1459
1460         spin_lock_irq(&qdio->req_q_lock);
1461         if (zfcp_qdio_sbal_get(qdio))
1462                 goto out;
1463
1464         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1465                                   SBAL_SFLAGS0_TYPE_READ,
1466                                   qdio->adapter->pool.erp_req);
1467
1468         if (IS_ERR(req)) {
1469                 retval = PTR_ERR(req);
1470                 goto out;
1471         }
1472
1473         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1474         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1475
1476         req->handler = zfcp_fsf_open_port_handler;
1477         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1478         req->data = port;
1479         req->erp_action = erp_action;
1480         erp_action->fsf_req_id = req->req_id;
1481         get_device(&port->dev);
1482
1483         zfcp_fsf_start_erp_timer(req);
1484         retval = zfcp_fsf_req_send(req);
1485         if (retval) {
1486                 zfcp_fsf_req_free(req);
1487                 erp_action->fsf_req_id = 0;
1488                 put_device(&port->dev);
1489         }
1490 out:
1491         spin_unlock_irq(&qdio->req_q_lock);
1492         return retval;
1493 }
1494
1495 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1496 {
1497         struct zfcp_port *port = req->data;
1498
1499         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1500                 return;
1501
1502         switch (req->qtcb->header.fsf_status) {
1503         case FSF_PORT_HANDLE_NOT_VALID:
1504                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1505                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1506                 break;
1507         case FSF_ADAPTER_STATUS_AVAILABLE:
1508                 break;
1509         case FSF_GOOD:
1510                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1511                 break;
1512         }
1513 }
1514
1515 /**
1516  * zfcp_fsf_close_port - create and send close port request
1517  * @erp_action: pointer to struct zfcp_erp_action
1518  * Returns: 0 on success, error otherwise
1519  */
1520 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1521 {
1522         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1523         struct zfcp_fsf_req *req;
1524         int retval = -EIO;
1525
1526         spin_lock_irq(&qdio->req_q_lock);
1527         if (zfcp_qdio_sbal_get(qdio))
1528                 goto out;
1529
1530         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1531                                   SBAL_SFLAGS0_TYPE_READ,
1532                                   qdio->adapter->pool.erp_req);
1533
1534         if (IS_ERR(req)) {
1535                 retval = PTR_ERR(req);
1536                 goto out;
1537         }
1538
1539         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1540         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1541
1542         req->handler = zfcp_fsf_close_port_handler;
1543         req->data = erp_action->port;
1544         req->erp_action = erp_action;
1545         req->qtcb->header.port_handle = erp_action->port->handle;
1546         erp_action->fsf_req_id = req->req_id;
1547
1548         zfcp_fsf_start_erp_timer(req);
1549         retval = zfcp_fsf_req_send(req);
1550         if (retval) {
1551                 zfcp_fsf_req_free(req);
1552                 erp_action->fsf_req_id = 0;
1553         }
1554 out:
1555         spin_unlock_irq(&qdio->req_q_lock);
1556         return retval;
1557 }
1558
1559 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1560 {
1561         struct zfcp_fc_wka_port *wka_port = req->data;
1562         struct fsf_qtcb_header *header = &req->qtcb->header;
1563
1564         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1565                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1566                 goto out;
1567         }
1568
1569         switch (header->fsf_status) {
1570         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1571                 dev_warn(&req->adapter->ccw_device->dev,
1572                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1573                 /* fall through */
1574         case FSF_ADAPTER_STATUS_AVAILABLE:
1575                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1576                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1577                 break;
1578         case FSF_GOOD:
1579                 wka_port->handle = header->port_handle;
1580                 /* fall through */
1581         case FSF_PORT_ALREADY_OPEN:
1582                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1583         }
1584 out:
1585         wake_up(&wka_port->completion_wq);
1586 }
1587
1588 /**
1589  * zfcp_fsf_open_wka_port - create and send open wka-port request
1590  * @wka_port: pointer to struct zfcp_fc_wka_port
1591  * Returns: 0 on success, error otherwise
1592  */
1593 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1594 {
1595         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1596         struct zfcp_fsf_req *req;
1597         unsigned long req_id = 0;
1598         int retval = -EIO;
1599
1600         spin_lock_irq(&qdio->req_q_lock);
1601         if (zfcp_qdio_sbal_get(qdio))
1602                 goto out;
1603
1604         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1605                                   SBAL_SFLAGS0_TYPE_READ,
1606                                   qdio->adapter->pool.erp_req);
1607
1608         if (IS_ERR(req)) {
1609                 retval = PTR_ERR(req);
1610                 goto out;
1611         }
1612
1613         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1614         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1615
1616         req->handler = zfcp_fsf_open_wka_port_handler;
1617         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1618         req->data = wka_port;
1619
1620         req_id = req->req_id;
1621
1622         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1623         retval = zfcp_fsf_req_send(req);
1624         if (retval)
1625                 zfcp_fsf_req_free(req);
1626 out:
1627         spin_unlock_irq(&qdio->req_q_lock);
1628         if (!retval)
1629                 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req_id);
1630         return retval;
1631 }
1632
1633 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1634 {
1635         struct zfcp_fc_wka_port *wka_port = req->data;
1636
1637         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1638                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1639                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1640         }
1641
1642         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1643         wake_up(&wka_port->completion_wq);
1644 }
1645
1646 /**
1647  * zfcp_fsf_close_wka_port - create and send close wka port request
1648  * @wka_port: WKA port to open
1649  * Returns: 0 on success, error otherwise
1650  */
1651 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1652 {
1653         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1654         struct zfcp_fsf_req *req;
1655         unsigned long req_id = 0;
1656         int retval = -EIO;
1657
1658         spin_lock_irq(&qdio->req_q_lock);
1659         if (zfcp_qdio_sbal_get(qdio))
1660                 goto out;
1661
1662         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1663                                   SBAL_SFLAGS0_TYPE_READ,
1664                                   qdio->adapter->pool.erp_req);
1665
1666         if (IS_ERR(req)) {
1667                 retval = PTR_ERR(req);
1668                 goto out;
1669         }
1670
1671         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1672         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1673
1674         req->handler = zfcp_fsf_close_wka_port_handler;
1675         req->data = wka_port;
1676         req->qtcb->header.port_handle = wka_port->handle;
1677
1678         req_id = req->req_id;
1679
1680         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1681         retval = zfcp_fsf_req_send(req);
1682         if (retval)
1683                 zfcp_fsf_req_free(req);
1684 out:
1685         spin_unlock_irq(&qdio->req_q_lock);
1686         if (!retval)
1687                 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req_id);
1688         return retval;
1689 }
1690
1691 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1692 {
1693         struct zfcp_port *port = req->data;
1694         struct fsf_qtcb_header *header = &req->qtcb->header;
1695         struct scsi_device *sdev;
1696
1697         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1698                 return;
1699
1700         switch (header->fsf_status) {
1701         case FSF_PORT_HANDLE_NOT_VALID:
1702                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1703                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1704                 break;
1705         case FSF_PORT_BOXED:
1706                 /* can't use generic zfcp_erp_modify_port_status because
1707                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1708                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1709                 shost_for_each_device(sdev, port->adapter->scsi_host)
1710                         if (sdev_to_zfcp(sdev)->port == port)
1711                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1712                                                   &sdev_to_zfcp(sdev)->status);
1713                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1714                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1715                                      "fscpph2");
1716                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1717                 break;
1718         case FSF_ADAPTER_STATUS_AVAILABLE:
1719                 switch (header->fsf_status_qual.word[0]) {
1720                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1721                         /* fall through */
1722                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1723                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1724                         break;
1725                 }
1726                 break;
1727         case FSF_GOOD:
1728                 /* can't use generic zfcp_erp_modify_port_status because
1729                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1730                  */
1731                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1732                 shost_for_each_device(sdev, port->adapter->scsi_host)
1733                         if (sdev_to_zfcp(sdev)->port == port)
1734                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1735                                                   &sdev_to_zfcp(sdev)->status);
1736                 break;
1737         }
1738 }
1739
1740 /**
1741  * zfcp_fsf_close_physical_port - close physical port
1742  * @erp_action: pointer to struct zfcp_erp_action
1743  * Returns: 0 on success
1744  */
1745 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1746 {
1747         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1748         struct zfcp_fsf_req *req;
1749         int retval = -EIO;
1750
1751         spin_lock_irq(&qdio->req_q_lock);
1752         if (zfcp_qdio_sbal_get(qdio))
1753                 goto out;
1754
1755         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1756                                   SBAL_SFLAGS0_TYPE_READ,
1757                                   qdio->adapter->pool.erp_req);
1758
1759         if (IS_ERR(req)) {
1760                 retval = PTR_ERR(req);
1761                 goto out;
1762         }
1763
1764         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1765         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1766
1767         req->data = erp_action->port;
1768         req->qtcb->header.port_handle = erp_action->port->handle;
1769         req->erp_action = erp_action;
1770         req->handler = zfcp_fsf_close_physical_port_handler;
1771         erp_action->fsf_req_id = req->req_id;
1772
1773         zfcp_fsf_start_erp_timer(req);
1774         retval = zfcp_fsf_req_send(req);
1775         if (retval) {
1776                 zfcp_fsf_req_free(req);
1777                 erp_action->fsf_req_id = 0;
1778         }
1779 out:
1780         spin_unlock_irq(&qdio->req_q_lock);
1781         return retval;
1782 }
1783
1784 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1785 {
1786         struct zfcp_adapter *adapter = req->adapter;
1787         struct scsi_device *sdev = req->data;
1788         struct zfcp_scsi_dev *zfcp_sdev;
1789         struct fsf_qtcb_header *header = &req->qtcb->header;
1790         union fsf_status_qual *qual = &header->fsf_status_qual;
1791
1792         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1793                 return;
1794
1795         zfcp_sdev = sdev_to_zfcp(sdev);
1796
1797         atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1798                           ZFCP_STATUS_COMMON_ACCESS_BOXED,
1799                           &zfcp_sdev->status);
1800
1801         switch (header->fsf_status) {
1802
1803         case FSF_PORT_HANDLE_NOT_VALID:
1804                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1805                 /* fall through */
1806         case FSF_LUN_ALREADY_OPEN:
1807                 break;
1808         case FSF_PORT_BOXED:
1809                 zfcp_erp_set_port_status(zfcp_sdev->port,
1810                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1811                 zfcp_erp_port_reopen(zfcp_sdev->port,
1812                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1813                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1814                 break;
1815         case FSF_LUN_SHARING_VIOLATION:
1816                 if (qual->word[0])
1817                         dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1818                                  "LUN 0x%Lx on port 0x%Lx is already in "
1819                                  "use by CSS%d, MIF Image ID %x\n",
1820                                  zfcp_scsi_dev_lun(sdev),
1821                                  (unsigned long long)zfcp_sdev->port->wwpn,
1822                                  qual->fsf_queue_designator.cssid,
1823                                  qual->fsf_queue_designator.hla);
1824                 zfcp_erp_set_lun_status(sdev,
1825                                         ZFCP_STATUS_COMMON_ERP_FAILED |
1826                                         ZFCP_STATUS_COMMON_ACCESS_DENIED);
1827                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1828                 break;
1829         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1830                 dev_warn(&adapter->ccw_device->dev,
1831                          "No handle is available for LUN "
1832                          "0x%016Lx on port 0x%016Lx\n",
1833                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1834                          (unsigned long long)zfcp_sdev->port->wwpn);
1835                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1836                 /* fall through */
1837         case FSF_INVALID_COMMAND_OPTION:
1838                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1839                 break;
1840         case FSF_ADAPTER_STATUS_AVAILABLE:
1841                 switch (header->fsf_status_qual.word[0]) {
1842                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1843                         zfcp_fc_test_link(zfcp_sdev->port);
1844                         /* fall through */
1845                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1846                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1847                         break;
1848                 }
1849                 break;
1850
1851         case FSF_GOOD:
1852                 zfcp_sdev->lun_handle = header->lun_handle;
1853                 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1854                 break;
1855         }
1856 }
1857
1858 /**
1859  * zfcp_fsf_open_lun - open LUN
1860  * @erp_action: pointer to struct zfcp_erp_action
1861  * Returns: 0 on success, error otherwise
1862  */
1863 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1864 {
1865         struct zfcp_adapter *adapter = erp_action->adapter;
1866         struct zfcp_qdio *qdio = adapter->qdio;
1867         struct zfcp_fsf_req *req;
1868         int retval = -EIO;
1869
1870         spin_lock_irq(&qdio->req_q_lock);
1871         if (zfcp_qdio_sbal_get(qdio))
1872                 goto out;
1873
1874         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1875                                   SBAL_SFLAGS0_TYPE_READ,
1876                                   adapter->pool.erp_req);
1877
1878         if (IS_ERR(req)) {
1879                 retval = PTR_ERR(req);
1880                 goto out;
1881         }
1882
1883         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1884         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1885
1886         req->qtcb->header.port_handle = erp_action->port->handle;
1887         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1888         req->handler = zfcp_fsf_open_lun_handler;
1889         req->data = erp_action->sdev;
1890         req->erp_action = erp_action;
1891         erp_action->fsf_req_id = req->req_id;
1892
1893         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1894                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1895
1896         zfcp_fsf_start_erp_timer(req);
1897         retval = zfcp_fsf_req_send(req);
1898         if (retval) {
1899                 zfcp_fsf_req_free(req);
1900                 erp_action->fsf_req_id = 0;
1901         }
1902 out:
1903         spin_unlock_irq(&qdio->req_q_lock);
1904         return retval;
1905 }
1906
1907 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1908 {
1909         struct scsi_device *sdev = req->data;
1910         struct zfcp_scsi_dev *zfcp_sdev;
1911
1912         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1913                 return;
1914
1915         zfcp_sdev = sdev_to_zfcp(sdev);
1916
1917         switch (req->qtcb->header.fsf_status) {
1918         case FSF_PORT_HANDLE_NOT_VALID:
1919                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1920                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1921                 break;
1922         case FSF_LUN_HANDLE_NOT_VALID:
1923                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1924                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1925                 break;
1926         case FSF_PORT_BOXED:
1927                 zfcp_erp_set_port_status(zfcp_sdev->port,
1928                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1929                 zfcp_erp_port_reopen(zfcp_sdev->port,
1930                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1931                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1932                 break;
1933         case FSF_ADAPTER_STATUS_AVAILABLE:
1934                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1935                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1936                         zfcp_fc_test_link(zfcp_sdev->port);
1937                         /* fall through */
1938                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1939                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1940                         break;
1941                 }
1942                 break;
1943         case FSF_GOOD:
1944                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1945                 break;
1946         }
1947 }
1948
1949 /**
1950  * zfcp_fsf_close_LUN - close LUN
1951  * @erp_action: pointer to erp_action triggering the "close LUN"
1952  * Returns: 0 on success, error otherwise
1953  */
1954 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1955 {
1956         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1957         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1958         struct zfcp_fsf_req *req;
1959         int retval = -EIO;
1960
1961         spin_lock_irq(&qdio->req_q_lock);
1962         if (zfcp_qdio_sbal_get(qdio))
1963                 goto out;
1964
1965         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1966                                   SBAL_SFLAGS0_TYPE_READ,
1967                                   qdio->adapter->pool.erp_req);
1968
1969         if (IS_ERR(req)) {
1970                 retval = PTR_ERR(req);
1971                 goto out;
1972         }
1973
1974         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1975         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1976
1977         req->qtcb->header.port_handle = erp_action->port->handle;
1978         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1979         req->handler = zfcp_fsf_close_lun_handler;
1980         req->data = erp_action->sdev;
1981         req->erp_action = erp_action;
1982         erp_action->fsf_req_id = req->req_id;
1983
1984         zfcp_fsf_start_erp_timer(req);
1985         retval = zfcp_fsf_req_send(req);
1986         if (retval) {
1987                 zfcp_fsf_req_free(req);
1988                 erp_action->fsf_req_id = 0;
1989         }
1990 out:
1991         spin_unlock_irq(&qdio->req_q_lock);
1992         return retval;
1993 }
1994
1995 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1996 {
1997         lat_rec->sum += lat;
1998         lat_rec->min = min(lat_rec->min, lat);
1999         lat_rec->max = max(lat_rec->max, lat);
2000 }
2001
2002 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2003 {
2004         struct fsf_qual_latency_info *lat_in;
2005         struct latency_cont *lat = NULL;
2006         struct zfcp_scsi_dev *zfcp_sdev;
2007         struct zfcp_blk_drv_data blktrc;
2008         int ticks = req->adapter->timer_ticks;
2009
2010         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2011
2012         blktrc.flags = 0;
2013         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2014         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2015                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2016         blktrc.inb_usage = 0;
2017         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2018
2019         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2020             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2021                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2022                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2023                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2024                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2025
2026                 switch (req->qtcb->bottom.io.data_direction) {
2027                 case FSF_DATADIR_DIF_READ_STRIP:
2028                 case FSF_DATADIR_DIF_READ_CONVERT:
2029                 case FSF_DATADIR_READ:
2030                         lat = &zfcp_sdev->latencies.read;
2031                         break;
2032                 case FSF_DATADIR_DIF_WRITE_INSERT:
2033                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2034                 case FSF_DATADIR_WRITE:
2035                         lat = &zfcp_sdev->latencies.write;
2036                         break;
2037                 case FSF_DATADIR_CMND:
2038                         lat = &zfcp_sdev->latencies.cmd;
2039                         break;
2040                 }
2041
2042                 if (lat) {
2043                         spin_lock(&zfcp_sdev->latencies.lock);
2044                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2045                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2046                         lat->counter++;
2047                         spin_unlock(&zfcp_sdev->latencies.lock);
2048                 }
2049         }
2050
2051         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2052                             sizeof(blktrc));
2053 }
2054
2055 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2056 {
2057         struct scsi_cmnd *scmnd = req->data;
2058         struct scsi_device *sdev = scmnd->device;
2059         struct zfcp_scsi_dev *zfcp_sdev;
2060         struct fsf_qtcb_header *header = &req->qtcb->header;
2061
2062         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2063                 return;
2064
2065         zfcp_sdev = sdev_to_zfcp(sdev);
2066
2067         switch (header->fsf_status) {
2068         case FSF_HANDLE_MISMATCH:
2069         case FSF_PORT_HANDLE_NOT_VALID:
2070                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2071                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2072                 break;
2073         case FSF_FCPLUN_NOT_VALID:
2074         case FSF_LUN_HANDLE_NOT_VALID:
2075                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2076                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2077                 break;
2078         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2079                 zfcp_fsf_class_not_supp(req);
2080                 break;
2081         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2082                 dev_err(&req->adapter->ccw_device->dev,
2083                         "Incorrect direction %d, LUN 0x%016Lx on port "
2084                         "0x%016Lx closed\n",
2085                         req->qtcb->bottom.io.data_direction,
2086                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2087                         (unsigned long long)zfcp_sdev->port->wwpn);
2088                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2089                                           "fssfch3");
2090                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2091                 break;
2092         case FSF_CMND_LENGTH_NOT_VALID:
2093                 dev_err(&req->adapter->ccw_device->dev,
2094                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2095                         "port 0x%016Lx closed\n",
2096                         req->qtcb->bottom.io.fcp_cmnd_length,
2097                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2098                         (unsigned long long)zfcp_sdev->port->wwpn);
2099                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2100                                           "fssfch4");
2101                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2102                 break;
2103         case FSF_PORT_BOXED:
2104                 zfcp_erp_set_port_status(zfcp_sdev->port,
2105                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2106                 zfcp_erp_port_reopen(zfcp_sdev->port,
2107                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2108                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2109                 break;
2110         case FSF_LUN_BOXED:
2111                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2112                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2113                                     "fssfch6");
2114                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2115                 break;
2116         case FSF_ADAPTER_STATUS_AVAILABLE:
2117                 if (header->fsf_status_qual.word[0] ==
2118                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2119                         zfcp_fc_test_link(zfcp_sdev->port);
2120                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2121                 break;
2122         }
2123 }
2124
2125 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2126 {
2127         struct scsi_cmnd *scpnt;
2128         struct fcp_resp_with_ext *fcp_rsp;
2129         unsigned long flags;
2130
2131         read_lock_irqsave(&req->adapter->abort_lock, flags);
2132
2133         scpnt = req->data;
2134         if (unlikely(!scpnt)) {
2135                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2136                 return;
2137         }
2138
2139         zfcp_fsf_fcp_handler_common(req);
2140
2141         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2142                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2143                 goto skip_fsfstatus;
2144         }
2145
2146         switch (req->qtcb->header.fsf_status) {
2147         case FSF_INCONSISTENT_PROT_DATA:
2148         case FSF_INVALID_PROT_PARM:
2149                 set_host_byte(scpnt, DID_ERROR);
2150                 goto skip_fsfstatus;
2151         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2152                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2153                 goto skip_fsfstatus;
2154         case FSF_APP_TAG_CHECK_FAILURE:
2155                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2156                 goto skip_fsfstatus;
2157         case FSF_REF_TAG_CHECK_FAILURE:
2158                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2159                 goto skip_fsfstatus;
2160         }
2161         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2162         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2163
2164 skip_fsfstatus:
2165         zfcp_fsf_req_trace(req, scpnt);
2166         zfcp_dbf_scsi_result(scpnt, req);
2167
2168         scpnt->host_scribble = NULL;
2169         (scpnt->scsi_done) (scpnt);
2170         /*
2171          * We must hold this lock until scsi_done has been called.
2172          * Otherwise we may call scsi_done after abort regarding this
2173          * command has completed.
2174          * Note: scsi_done must not block!
2175          */
2176         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2177 }
2178
2179 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2180 {
2181         switch (scsi_get_prot_op(scsi_cmnd)) {
2182         case SCSI_PROT_NORMAL:
2183                 switch (scsi_cmnd->sc_data_direction) {
2184                 case DMA_NONE:
2185                         *data_dir = FSF_DATADIR_CMND;
2186                         break;
2187                 case DMA_FROM_DEVICE:
2188                         *data_dir = FSF_DATADIR_READ;
2189                         break;
2190                 case DMA_TO_DEVICE:
2191                         *data_dir = FSF_DATADIR_WRITE;
2192                         break;
2193                 case DMA_BIDIRECTIONAL:
2194                         return -EINVAL;
2195                 }
2196                 break;
2197
2198         case SCSI_PROT_READ_STRIP:
2199                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2200                 break;
2201         case SCSI_PROT_WRITE_INSERT:
2202                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2203                 break;
2204         case SCSI_PROT_READ_PASS:
2205                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2206                 break;
2207         case SCSI_PROT_WRITE_PASS:
2208                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2209                 break;
2210         default:
2211                 return -EINVAL;
2212         }
2213
2214         return 0;
2215 }
2216
2217 /**
2218  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2219  * @scsi_cmnd: scsi command to be sent
2220  */
2221 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2222 {
2223         struct zfcp_fsf_req *req;
2224         struct fcp_cmnd *fcp_cmnd;
2225         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2226         int retval = -EIO;
2227         struct scsi_device *sdev = scsi_cmnd->device;
2228         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2229         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2230         struct zfcp_qdio *qdio = adapter->qdio;
2231         struct fsf_qtcb_bottom_io *io;
2232         unsigned long flags;
2233
2234         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2235                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2236                 return -EBUSY;
2237
2238         spin_lock_irqsave(&qdio->req_q_lock, flags);
2239         if (atomic_read(&qdio->req_q_free) <= 0) {
2240                 atomic_inc(&qdio->req_q_full);
2241                 goto out;
2242         }
2243
2244         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2245                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2246
2247         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2248                                   sbtype, adapter->pool.scsi_req);
2249
2250         if (IS_ERR(req)) {
2251                 retval = PTR_ERR(req);
2252                 goto out;
2253         }
2254
2255         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2256
2257         io = &req->qtcb->bottom.io;
2258         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2259         req->data = scsi_cmnd;
2260         req->handler = zfcp_fsf_fcp_cmnd_handler;
2261         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2262         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2263         io->service_class = FSF_CLASS_3;
2264         io->fcp_cmnd_length = FCP_CMND_LEN;
2265
2266         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2267                 io->data_block_length = scsi_cmnd->device->sector_size;
2268                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2269         }
2270
2271         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2272                 goto failed_scsi_cmnd;
2273
2274         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2275         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2276
2277         if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2278             scsi_prot_sg_count(scsi_cmnd)) {
2279                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2280                                        scsi_prot_sg_count(scsi_cmnd));
2281                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2282                                                  scsi_prot_sglist(scsi_cmnd));
2283                 if (retval)
2284                         goto failed_scsi_cmnd;
2285                 io->prot_data_length = zfcp_qdio_real_bytes(
2286                                                 scsi_prot_sglist(scsi_cmnd));
2287         }
2288
2289         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2290                                          scsi_sglist(scsi_cmnd));
2291         if (unlikely(retval))
2292                 goto failed_scsi_cmnd;
2293
2294         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2295         if (zfcp_adapter_multi_buffer_active(adapter))
2296                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2297
2298         retval = zfcp_fsf_req_send(req);
2299         if (unlikely(retval))
2300                 goto failed_scsi_cmnd;
2301
2302         goto out;
2303
2304 failed_scsi_cmnd:
2305         zfcp_fsf_req_free(req);
2306         scsi_cmnd->host_scribble = NULL;
2307 out:
2308         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2309         return retval;
2310 }
2311
2312 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2313 {
2314         struct fcp_resp_with_ext *fcp_rsp;
2315         struct fcp_resp_rsp_info *rsp_info;
2316
2317         zfcp_fsf_fcp_handler_common(req);
2318
2319         fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2320         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2321
2322         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2323              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2324                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2325 }
2326
2327 /**
2328  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2329  * @scmnd: SCSI command to send the task management command for
2330  * @tm_flags: unsigned byte for task management flags
2331  * Returns: on success pointer to struct fsf_req, NULL otherwise
2332  */
2333 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2334                                             u8 tm_flags)
2335 {
2336         struct zfcp_fsf_req *req = NULL;
2337         struct fcp_cmnd *fcp_cmnd;
2338         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2339         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2340
2341         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2342                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2343                 return NULL;
2344
2345         spin_lock_irq(&qdio->req_q_lock);
2346         if (zfcp_qdio_sbal_get(qdio))
2347                 goto out;
2348
2349         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2350                                   SBAL_SFLAGS0_TYPE_WRITE,
2351                                   qdio->adapter->pool.scsi_req);
2352
2353         if (IS_ERR(req)) {
2354                 req = NULL;
2355                 goto out;
2356         }
2357
2358         req->data = scmnd;
2359         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2360         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2361         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2362         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2363         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2364         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2365
2366         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2367
2368         fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2369         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2370
2371         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2372         if (!zfcp_fsf_req_send(req))
2373                 goto out;
2374
2375         zfcp_fsf_req_free(req);
2376         req = NULL;
2377 out:
2378         spin_unlock_irq(&qdio->req_q_lock);
2379         return req;
2380 }
2381
2382 /**
2383  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2384  * @adapter: pointer to struct zfcp_adapter
2385  * @sbal_idx: response queue index of SBAL to be processed
2386  */
2387 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2388 {
2389         struct zfcp_adapter *adapter = qdio->adapter;
2390         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2391         struct qdio_buffer_element *sbale;
2392         struct zfcp_fsf_req *fsf_req;
2393         unsigned long req_id;
2394         int idx;
2395
2396         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2397
2398                 sbale = &sbal->element[idx];
2399                 req_id = (unsigned long) sbale->addr;
2400                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2401
2402                 if (!fsf_req) {
2403                         /*
2404                          * Unknown request means that we have potentially memory
2405                          * corruption and must stop the machine immediately.
2406                          */
2407                         zfcp_qdio_siosl(adapter);
2408                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2409                               req_id, dev_name(&adapter->ccw_device->dev));
2410                 }
2411
2412                 fsf_req->qdio_req.sbal_response = sbal_idx;
2413                 zfcp_fsf_req_complete(fsf_req);
2414
2415                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2416                         break;
2417         }
2418 }