drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Implementation of FSF commands.
   5  *
   6  * Copyright IBM Corp. 2002, 2017
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/blktrace_api.h>
  13 #include <linux/slab.h>
  14 #include <scsi/fc/fc_els.h>
  15 #include "zfcp_ext.h"
  16 #include "zfcp_fc.h"
  17 #include "zfcp_dbf.h"
  18 #include "zfcp_qdio.h"
  19 #include "zfcp_reqlist.h"
  20
  21 struct kmem_cache *zfcp_fsf_qtcb_cache;
  22
  23 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  24 {
  25         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  26         zfcp_qdio_siosl(adapter);
  27         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  28                                 "fsrth_1");
  29 }
  30
  31 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  32                                  unsigned long timeout)
  33 {
  34         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  35         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  36         fsf_req->timer.expires = jiffies + timeout;
  37         add_timer(&fsf_req->timer);
  38 }
  39
  40 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  41 {
  42         BUG_ON(!fsf_req->erp_action);
  43         fsf_req->timer.function = zfcp_erp_timeout_handler;
  44         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  45         fsf_req->timer.expires = jiffies + 30 * HZ;
  46         add_timer(&fsf_req->timer);
  47 }
  48
  49 /* association between FSF command and FSF QTCB type */
  50 static u32 fsf_qtcb_type[] = {
  51         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  52         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  53         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  54         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  55         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  56         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  57         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  58         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  61         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  62         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  63         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  64 };
  65
  66 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  67 {
  68         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  69                 "operational because of an unsupported FC class\n");
  70         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  71         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  72 }
  73
  74 /**
  75  * zfcp_fsf_req_free - free memory used by fsf request
  76  * @fsf_req: pointer to struct zfcp_fsf_req
  77  */
  78 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  79 {
  80         if (likely(req->pool)) {
  81                 if (likely(req->qtcb))
  82                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  83                 mempool_free(req, req->pool);
  84                 return;
  85         }
  86
  87         if (likely(req->qtcb))
  88                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  89         kfree(req);
  90 }
  91
  92 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  93 {
  94         unsigned long flags;
  95         struct fsf_status_read_buffer *sr_buf = req->data;
  96         struct zfcp_adapter *adapter = req->adapter;
  97         struct zfcp_port *port;
  98         int d_id = ntoh24(sr_buf->d_id);
  99
 100         read_lock_irqsave(&adapter->port_list_lock, flags);
 101         list_for_each_entry(port, &adapter->port_list, list)
 102                 if (port->d_id == d_id) {
 103                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 104                         break;
 105                 }
 106         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 107 }
 108
 109 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 110                                          struct fsf_link_down_info *link_down)
 111 {
 112         struct zfcp_adapter *adapter = req->adapter;
 113
 114         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 115                 return;
 116
 117         atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 118
 119         zfcp_scsi_schedule_rports_block(adapter);
 120
 121         if (!link_down)
 122                 goto out;
 123
 124         switch (link_down->error_code) {
 125         case FSF_PSQ_LINK_NO_LIGHT:
 126                 dev_warn(&req->adapter->ccw_device->dev,
 127                          "There is no light signal from the local "
 128                          "fibre channel cable\n");
 129                 break;
 130         case FSF_PSQ_LINK_WRAP_PLUG:
 131                 dev_warn(&req->adapter->ccw_device->dev,
 132                          "There is a wrap plug instead of a fibre "
 133                          "channel cable\n");
 134                 break;
 135         case FSF_PSQ_LINK_NO_FCP:
 136                 dev_warn(&req->adapter->ccw_device->dev,
 137                          "The adjacent fibre channel node does not "
 138                          "support FCP\n");
 139                 break;
 140         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 141                 dev_warn(&req->adapter->ccw_device->dev,
 142                          "The FCP device is suspended because of a "
 143                          "firmware update\n");
 144                 break;
 145         case FSF_PSQ_LINK_INVALID_WWPN:
 146                 dev_warn(&req->adapter->ccw_device->dev,
 147                          "The FCP device detected a WWPN that is "
 148                          "duplicate or not valid\n");
 149                 break;
 150         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 151                 dev_warn(&req->adapter->ccw_device->dev,
 152                          "The fibre channel fabric does not support NPIV\n");
 153                 break;
 154         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 155                 dev_warn(&req->adapter->ccw_device->dev,
 156                          "The FCP adapter cannot support more NPIV ports\n");
 157                 break;
 158         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 159                 dev_warn(&req->adapter->ccw_device->dev,
 160                          "The adjacent switch cannot support "
 161                          "more NPIV ports\n");
 162                 break;
 163         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 164                 dev_warn(&req->adapter->ccw_device->dev,
 165                          "The FCP adapter could not log in to the "
 166                          "fibre channel fabric\n");
 167                 break;
 168         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 169                 dev_warn(&req->adapter->ccw_device->dev,
 170                          "The WWPN assignment file on the FCP adapter "
 171                          "has been damaged\n");
 172                 break;
 173         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 174                 dev_warn(&req->adapter->ccw_device->dev,
 175                          "The mode table on the FCP adapter "
 176                          "has been damaged\n");
 177                 break;
 178         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 179                 dev_warn(&req->adapter->ccw_device->dev,
 180                          "All NPIV ports on the FCP adapter have "
 181                          "been assigned\n");
 182                 break;
 183         default:
 184                 dev_warn(&req->adapter->ccw_device->dev,
 185                          "The link between the FCP adapter and "
 186                          "the FC fabric is down\n");
 187         }
 188 out:
 189         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 190 }
 191
 192 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 193 {
 194         struct fsf_status_read_buffer *sr_buf = req->data;
 195         struct fsf_link_down_info *ldi =
 196                 (struct fsf_link_down_info *) &sr_buf->payload;
 197
 198         switch (sr_buf->status_subtype) {
 199         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 200         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 201                 zfcp_fsf_link_down_info_eval(req, ldi);
 202                 break;
 203         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 204                 zfcp_fsf_link_down_info_eval(req, NULL);
 205         }
 206 }
 207
 208 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 209 {
 210         struct zfcp_adapter *adapter = req->adapter;
 211         struct fsf_status_read_buffer *sr_buf = req->data;
 212
 213         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 214                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 215                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 216                 zfcp_fsf_req_free(req);
 217                 return;
 218         }
 219
 220         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 221
 222         switch (sr_buf->status_type) {
 223         case FSF_STATUS_READ_PORT_CLOSED:
 224                 zfcp_fsf_status_read_port_closed(req);
 225                 break;
 226         case FSF_STATUS_READ_INCOMING_ELS:
 227                 zfcp_fc_incoming_els(req);
 228                 break;
 229         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 230                 break;
 231         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 232                 dev_warn(&adapter->ccw_device->dev,
 233                          "The error threshold for checksum statistics "
 234                          "has been exceeded\n");
 235                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 236                 break;
 237         case FSF_STATUS_READ_LINK_DOWN:
 238                 zfcp_fsf_status_read_link_down(req);
 239                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 240                 break;
 241         case FSF_STATUS_READ_LINK_UP:
 242                 dev_info(&adapter->ccw_device->dev,
 243                          "The local link has been restored\n");
 244                 /* All ports should be marked as ready to run again */
 245                 zfcp_erp_set_adapter_status(adapter,
 246                                             ZFCP_STATUS_COMMON_RUNNING);
 247                 zfcp_erp_adapter_reopen(adapter,
 248                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 249                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 250                                         "fssrh_2");
 251                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 252
 253                 break;
 254         case FSF_STATUS_READ_NOTIFICATION_LOST:
 255                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 256                         zfcp_fc_conditional_port_scan(adapter);
 257                 break;
 258         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 259                 adapter->adapter_features = sr_buf->payload.word[0];
 260                 break;
 261         }
 262
 263         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 264         zfcp_fsf_req_free(req);
 265
 266         atomic_inc(&adapter->stat_miss);
 267         queue_work(adapter->work_queue, &adapter->stat_work);
 268 }
 269
 270 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 271 {
 272         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 273         case FSF_SQ_FCP_RSP_AVAILABLE:
 274         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 275         case FSF_SQ_NO_RETRY_POSSIBLE:
 276         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 277                 return;
 278         case FSF_SQ_COMMAND_ABORTED:
 279                 break;
 280         case FSF_SQ_NO_RECOM:
 281                 dev_err(&req->adapter->ccw_device->dev,
 282                         "The FCP adapter reported a problem "
 283                         "that cannot be recovered\n");
 284                 zfcp_qdio_siosl(req->adapter);
 285                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 286                 break;
 287         }
 288         /* all non-return stats set FSFREQ_ERROR*/
 289         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 290 }
 291
 292 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 293 {
 294         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 295                 return;
 296
 297         switch (req->qtcb->header.fsf_status) {
 298         case FSF_UNKNOWN_COMMAND:
 299                 dev_err(&req->adapter->ccw_device->dev,
 300                         "The FCP adapter does not recognize the command 0x%x\n",
 301                         req->qtcb->header.fsf_command);
 302                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 303                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 304                 break;
 305         case FSF_ADAPTER_STATUS_AVAILABLE:
 306                 zfcp_fsf_fsfstatus_qual_eval(req);
 307                 break;
 308         }
 309 }
 310
 311 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 312 {
 313         struct zfcp_adapter *adapter = req->adapter;
 314         struct fsf_qtcb *qtcb = req->qtcb;
 315         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 316
 317         zfcp_dbf_hba_fsf_response(req);
 318
 319         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 320                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 321                 return;
 322         }
 323
 324         switch (qtcb->prefix.prot_status) {
 325         case FSF_PROT_GOOD:
 326         case FSF_PROT_FSF_STATUS_PRESENTED:
 327                 return;
 328         case FSF_PROT_QTCB_VERSION_ERROR:
 329                 dev_err(&adapter->ccw_device->dev,
 330                         "QTCB version 0x%x not supported by FCP adapter "
 331                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 332                         psq->word[0], psq->word[1]);
 333                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 334                 break;
 335         case FSF_PROT_ERROR_STATE:
 336         case FSF_PROT_SEQ_NUMB_ERROR:
 337                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 338                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 339                 break;
 340         case FSF_PROT_UNSUPP_QTCB_TYPE:
 341                 dev_err(&adapter->ccw_device->dev,
 342                         "The QTCB type is not supported by the FCP adapter\n");
 343                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 344                 break;
 345         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 346                 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 347                                 &adapter->status);
 348                 break;
 349         case FSF_PROT_DUPLICATE_REQUEST_ID:
 350                 dev_err(&adapter->ccw_device->dev,
 351                         "0x%Lx is an ambiguous request identifier\n",
 352                         (unsigned long long)qtcb->bottom.support.req_handle);
 353                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 354                 break;
 355         case FSF_PROT_LINK_DOWN:
 356                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 357                 /* go through reopen to flush pending requests */
 358                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 359                 break;
 360         case FSF_PROT_REEST_QUEUE:
 361                 /* All ports should be marked as ready to run again */
 362                 zfcp_erp_set_adapter_status(adapter,
 363                                             ZFCP_STATUS_COMMON_RUNNING);
 364                 zfcp_erp_adapter_reopen(adapter,
 365                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 366                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 367                                         "fspse_8");
 368                 break;
 369         default:
 370                 dev_err(&adapter->ccw_device->dev,
 371                         "0x%x is not a valid transfer protocol status\n",
 372                         qtcb->prefix.prot_status);
 373                 zfcp_qdio_siosl(adapter);
 374                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 375         }
 376         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 377 }
 378
 379 /**
 380  * zfcp_fsf_req_complete - process completion of a FSF request
 381  * @fsf_req: The FSF request that has been completed.
 382  *
 383  * When a request has been completed either from the FCP adapter,
 384  * or it has been dismissed due to a queue shutdown, this function
 385  * is called to process the completion status and trigger further
 386  * events related to the FSF request.
 387  */
 388 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 389 {
 390         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 391                 zfcp_fsf_status_read_handler(req);
 392                 return;
 393         }
 394
 395         del_timer(&req->timer);
 396         zfcp_fsf_protstatus_eval(req);
 397         zfcp_fsf_fsfstatus_eval(req);
 398         req->handler(req);
 399
 400         if (req->erp_action)
 401                 zfcp_erp_notify(req->erp_action, 0);
 402
 403         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 404                 zfcp_fsf_req_free(req);
 405         else
 406                 complete(&req->completion);
 407 }
 408
 409 /**
 410  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 411  * @adapter: pointer to struct zfcp_adapter
 412  *
 413  * Never ever call this without shutting down the adapter first.
 414  * Otherwise the adapter would continue using and corrupting s390 storage.
 415  * Included BUG_ON() call to ensure this is done.
 416  * ERP is supposed to be the only user of this function.
 417  */
 418 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 419 {
 420         struct zfcp_fsf_req *req, *tmp;
 421         LIST_HEAD(remove_queue);
 422
 423         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 424         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 425
 426         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 427                 list_del(&req->list);
 428                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 429                 zfcp_fsf_req_complete(req);
 430         }
 431 }
 432
 433 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 434 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 435 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 436 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 437 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 438 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 439 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 440
 441 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 442 {
 443         u32 fdmi_speed = 0;
 444         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 445                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 446         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 447                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 448         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 449                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 450         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 451                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 452         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 453                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 454         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 455                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 456         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 457                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 458         return fdmi_speed;
 459 }
 460
 461 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 462 {
 463         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 464         struct zfcp_adapter *adapter = req->adapter;
 465         struct Scsi_Host *shost = adapter->scsi_host;
 466         struct fc_els_flogi *nsp, *plogi;
 467
 468         /* adjust pointers for missing command code */
 469         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 470                                         - sizeof(u32));
 471         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 472                                         - sizeof(u32));
 473
 474         if (req->data)
 475                 memcpy(req->data, bottom, sizeof(*bottom));
 476
 477         fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn);
 478         fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn);
 479         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 480
 481         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 482         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 483                                          (u16)FSF_STATUS_READS_RECOM);
 484
 485         if (fc_host_permanent_port_name(shost) == -1)
 486                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 487
 488         zfcp_scsi_set_prot(adapter);
 489
 490         /* no error return above here, otherwise must fix call chains */
 491         /* do not evaluate invalid fields */
 492         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
 493                 return 0;
 494
 495         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 496         fc_host_speed(shost) =
 497                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
 498
 499         adapter->hydra_version = bottom->adapter_type;
 500
 501         switch (bottom->fc_topology) {
 502         case FSF_TOPO_P2P:
 503                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 504                 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
 505                 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
 506                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 507                 break;
 508         case FSF_TOPO_FABRIC:
 509                 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
 510                         fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 511                 else
 512                         fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 513                 break;
 514         case FSF_TOPO_AL:
 515                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 516                 /* fall through */
 517         default:
 518                 dev_err(&adapter->ccw_device->dev,
 519                         "Unknown or unsupported arbitrated loop "
 520                         "fibre channel topology detected\n");
 521                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 522                 return -EIO;
 523         }
 524
 525         return 0;
 526 }
 527
 528 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 529 {
 530         struct zfcp_adapter *adapter = req->adapter;
 531         struct fsf_qtcb *qtcb = req->qtcb;
 532         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 533         struct Scsi_Host *shost = adapter->scsi_host;
 534
 535         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 536                 return;
 537
 538         adapter->fsf_lic_version = bottom->lic_version;
 539         adapter->adapter_features = bottom->adapter_features;
 540         adapter->connection_features = bottom->connection_features;
 541         adapter->peer_wwpn = 0;
 542         adapter->peer_wwnn = 0;
 543         adapter->peer_d_id = 0;
 544
 545         switch (qtcb->header.fsf_status) {
 546         case FSF_GOOD:
 547                 if (zfcp_fsf_exchange_config_evaluate(req))
 548                         return;
 549
 550                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 551                         dev_err(&adapter->ccw_device->dev,
 552                                 "FCP adapter maximum QTCB size (%d bytes) "
 553                                 "is too small\n",
 554                                 bottom->max_qtcb_size);
 555                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 556                         return;
 557                 }
 558                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 559                                 &adapter->status);
 560                 break;
 561         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 562                 fc_host_node_name(shost) = 0;
 563                 fc_host_port_name(shost) = 0;
 564                 fc_host_port_id(shost) = 0;
 565                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 566                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 567                 adapter->hydra_version = 0;
 568
 569                 /* avoids adapter shutdown to be able to recognize
 570                  * events such as LINK UP */
 571                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 572                                 &adapter->status);
 573                 zfcp_fsf_link_down_info_eval(req,
 574                         &qtcb->header.fsf_status_qual.link_down_info);
 575                 if (zfcp_fsf_exchange_config_evaluate(req))
 576                         return;
 577                 break;
 578         default:
 579                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 580                 return;
 581         }
 582
 583         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 584                 adapter->hardware_version = bottom->hardware_version;
 585                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 586                        min(FC_SERIAL_NUMBER_SIZE, 17));
 587                 EBCASC(fc_host_serial_number(shost),
 588                        min(FC_SERIAL_NUMBER_SIZE, 17));
 589         }
 590
 591         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 592                 dev_err(&adapter->ccw_device->dev,
 593                         "The FCP adapter only supports newer "
 594                         "control block versions\n");
 595                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 596                 return;
 597         }
 598         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 599                 dev_err(&adapter->ccw_device->dev,
 600                         "The FCP adapter only supports older "
 601                         "control block versions\n");
 602                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 603         }
 604 }
 605
 606 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 607 {
 608         struct zfcp_adapter *adapter = req->adapter;
 609         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 610         struct Scsi_Host *shost = adapter->scsi_host;
 611
 612         if (req->data)
 613                 memcpy(req->data, bottom, sizeof(*bottom));
 614
 615         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 616                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 617         } else
 618                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 619         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 620         fc_host_supported_speeds(shost) =
 621                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
 622         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 623                FC_FC4_LIST_SIZE);
 624         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 625                FC_FC4_LIST_SIZE);
 626 }
 627
 628 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 629 {
 630         struct fsf_qtcb *qtcb = req->qtcb;
 631
 632         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 633                 return;
 634
 635         switch (qtcb->header.fsf_status) {
 636         case FSF_GOOD:
 637                 zfcp_fsf_exchange_port_evaluate(req);
 638                 break;
 639         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 640                 zfcp_fsf_exchange_port_evaluate(req);
 641                 zfcp_fsf_link_down_info_eval(req,
 642                         &qtcb->header.fsf_status_qual.link_down_info);
 643                 break;
 644         }
 645 }
 646
 647 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 648 {
 649         struct zfcp_fsf_req *req;
 650
 651         if (likely(pool))
 652                 req = mempool_alloc(pool, GFP_ATOMIC);
 653         else
 654                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 655
 656         if (unlikely(!req))
 657                 return NULL;
 658
 659         memset(req, 0, sizeof(*req));
 660         req->pool = pool;
 661         return req;
 662 }
 663
 664 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 665 {
 666         struct fsf_qtcb *qtcb;
 667
 668         if (likely(pool))
 669                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 670         else
 671                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 672
 673         if (unlikely(!qtcb))
 674                 return NULL;
 675
 676         memset(qtcb, 0, sizeof(*qtcb));
 677         return qtcb;
 678 }
 679
 680 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 681                                                 u32 fsf_cmd, u8 sbtype,
 682                                                 mempool_t *pool)
 683 {
 684         struct zfcp_adapter *adapter = qdio->adapter;
 685         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 686
 687         if (unlikely(!req))
 688                 return ERR_PTR(-ENOMEM);
 689
 690         if (adapter->req_no == 0)
 691                 adapter->req_no++;
 692
 693         INIT_LIST_HEAD(&req->list);
 694         init_timer(&req->timer);
 695         init_completion(&req->completion);
 696
 697         req->adapter = adapter;
 698         req->fsf_command = fsf_cmd;
 699         req->req_id = adapter->req_no;
 700
 701         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 702                 if (likely(pool))
 703                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 704                 else
 705                         req->qtcb = zfcp_qtcb_alloc(NULL);
 706
 707                 if (unlikely(!req->qtcb)) {
 708                         zfcp_fsf_req_free(req);
 709                         return ERR_PTR(-ENOMEM);
 710                 }
 711
 712                 req->seq_no = adapter->fsf_req_seq_no;
 713                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 714                 req->qtcb->prefix.req_id = req->req_id;
 715                 req->qtcb->prefix.ulp_info = 26;
 716                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 717                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 718                 req->qtcb->header.req_handle = req->req_id;
 719                 req->qtcb->header.fsf_command = req->fsf_command;
 720         }
 721
 722         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 723                            req->qtcb, sizeof(struct fsf_qtcb));
 724
 725         return req;
 726 }
 727
 728 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 729 {
 730         struct zfcp_adapter *adapter = req->adapter;
 731         struct zfcp_qdio *qdio = adapter->qdio;
 732         int with_qtcb = (req->qtcb != NULL);
 733         int req_id = req->req_id;
 734
 735         zfcp_reqlist_add(adapter->req_list, req);
 736
 737         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 738         req->issued = get_tod_clock();
 739         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 740                 del_timer(&req->timer);
 741                 /* lookup request again, list might have changed */
 742                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 743                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 744                 return -EIO;
 745         }
 746
 747         /* Don't increase for unsolicited status */
 748         if (with_qtcb)
 749                 adapter->fsf_req_seq_no++;
 750         adapter->req_no++;
 751
 752         return 0;
 753 }
 754
 755 /**
 756  * zfcp_fsf_status_read - send status read request
 757  * @adapter: pointer to struct zfcp_adapter
 758  * @req_flags: request flags
 759  * Returns: 0 on success, ERROR otherwise
 760  */
 761 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 762 {
 763         struct zfcp_adapter *adapter = qdio->adapter;
 764         struct zfcp_fsf_req *req;
 765         struct fsf_status_read_buffer *sr_buf;
 766         struct page *page;
 767         int retval = -EIO;
 768
 769         spin_lock_irq(&qdio->req_q_lock);
 770         if (zfcp_qdio_sbal_get(qdio))
 771                 goto out;
 772
 773         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 774                                   SBAL_SFLAGS0_TYPE_STATUS,
 775                                   adapter->pool.status_read_req);
 776         if (IS_ERR(req)) {
 777                 retval = PTR_ERR(req);
 778                 goto out;
 779         }
 780
 781         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 782         if (!page) {
 783                 retval = -ENOMEM;
 784                 goto failed_buf;
 785         }
 786         sr_buf = page_address(page);
 787         memset(sr_buf, 0, sizeof(*sr_buf));
 788         req->data = sr_buf;
 789
 790         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 791         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 792
 793         retval = zfcp_fsf_req_send(req);
 794         if (retval)
 795                 goto failed_req_send;
 796
 797         goto out;
 798
 799 failed_req_send:
 800         req->data = NULL;
 801         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 802 failed_buf:
 803         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 804         zfcp_fsf_req_free(req);
 805 out:
 806         spin_unlock_irq(&qdio->req_q_lock);
 807         return retval;
 808 }
 809
 810 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 811 {
 812         struct scsi_device *sdev = req->data;
 813         struct zfcp_scsi_dev *zfcp_sdev;
 814         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 815
 816         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 817                 return;
 818
 819         zfcp_sdev = sdev_to_zfcp(sdev);
 820
 821         switch (req->qtcb->header.fsf_status) {
 822         case FSF_PORT_HANDLE_NOT_VALID:
 823                 if (fsq->word[0] == fsq->word[1]) {
 824                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 825                                                 "fsafch1");
 826                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 827                 }
 828                 break;
 829         case FSF_LUN_HANDLE_NOT_VALID:
 830                 if (fsq->word[0] == fsq->word[1]) {
 831                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 832                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 833                 }
 834                 break;
 835         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 836                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 837                 break;
 838         case FSF_PORT_BOXED:
 839                 zfcp_erp_set_port_status(zfcp_sdev->port,
 840                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 841                 zfcp_erp_port_reopen(zfcp_sdev->port,
 842                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 843                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 844                 break;
 845         case FSF_LUN_BOXED:
 846                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 847                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 848                                     "fsafch4");
 849                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 850                 break;
 851         case FSF_ADAPTER_STATUS_AVAILABLE:
 852                 switch (fsq->word[0]) {
 853                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 854                         zfcp_fc_test_link(zfcp_sdev->port);
 855                         /* fall through */
 856                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 857                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 858                         break;
 859                 }
 860                 break;
 861         case FSF_GOOD:
 862                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 863                 break;
 864         }
 865 }
 866
 867 /**
 868  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 869  * @scmnd: The SCSI command to abort
 870  * Returns: pointer to struct zfcp_fsf_req
 871  */
 872
 873 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 874 {
 875         struct zfcp_fsf_req *req = NULL;
 876         struct scsi_device *sdev = scmnd->device;
 877         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 878         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 879         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 880
 881         spin_lock_irq(&qdio->req_q_lock);
 882         if (zfcp_qdio_sbal_get(qdio))
 883                 goto out;
 884         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 885                                   SBAL_SFLAGS0_TYPE_READ,
 886                                   qdio->adapter->pool.scsi_abort);
 887         if (IS_ERR(req)) {
 888                 req = NULL;
 889                 goto out;
 890         }
 891
 892         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 893                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 894                 goto out_error_free;
 895
 896         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 897
 898         req->data = sdev;
 899         req->handler = zfcp_fsf_abort_fcp_command_handler;
 900         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 901         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 902         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 903
 904         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 905         if (!zfcp_fsf_req_send(req))
 906                 goto out;
 907
 908 out_error_free:
 909         zfcp_fsf_req_free(req);
 910         req = NULL;
 911 out:
 912         spin_unlock_irq(&qdio->req_q_lock);
 913         return req;
 914 }
 915
 916 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 917 {
 918         struct zfcp_adapter *adapter = req->adapter;
 919         struct zfcp_fsf_ct_els *ct = req->data;
 920         struct fsf_qtcb_header *header = &req->qtcb->header;
 921
 922         ct->status = -EINVAL;
 923
 924         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 925                 goto skip_fsfstatus;
 926
 927         switch (header->fsf_status) {
 928         case FSF_GOOD:
 929                 ct->status = 0;
 930                 zfcp_dbf_san_res("fsscth2", req);
 931                 break;
 932         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 933                 zfcp_fsf_class_not_supp(req);
 934                 break;
 935         case FSF_ADAPTER_STATUS_AVAILABLE:
 936                 switch (header->fsf_status_qual.word[0]){
 937                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 938                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 939                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 940                         break;
 941                 }
 942                 break;
 943         case FSF_PORT_BOXED:
 944                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 945                 break;
 946         case FSF_PORT_HANDLE_NOT_VALID:
 947                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 948                 /* fall through */
 949         case FSF_GENERIC_COMMAND_REJECTED:
 950         case FSF_PAYLOAD_SIZE_MISMATCH:
 951         case FSF_REQUEST_SIZE_TOO_LARGE:
 952         case FSF_RESPONSE_SIZE_TOO_LARGE:
 953         case FSF_SBAL_MISMATCH:
 954                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 955                 break;
 956         }
 957
 958 skip_fsfstatus:
 959         if (ct->handler)
 960                 ct->handler(ct->handler_data);
 961 }
 962
 963 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 964                                             struct zfcp_qdio_req *q_req,
 965                                             struct scatterlist *sg_req,
 966                                             struct scatterlist *sg_resp)
 967 {
 968         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 969         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 970         zfcp_qdio_set_sbale_last(qdio, q_req);
 971 }
 972
 973 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 974                                        struct scatterlist *sg_req,
 975                                        struct scatterlist *sg_resp)
 976 {
 977         struct zfcp_adapter *adapter = req->adapter;
 978         struct zfcp_qdio *qdio = adapter->qdio;
 979         struct fsf_qtcb *qtcb = req->qtcb;
 980         u32 feat = adapter->adapter_features;
 981
 982         if (zfcp_adapter_multi_buffer_active(adapter)) {
 983                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 984                         return -EIO;
 985                 qtcb->bottom.support.req_buf_length =
 986                         zfcp_qdio_real_bytes(sg_req);
 987                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 988                         return -EIO;
 989                 qtcb->bottom.support.resp_buf_length =
 990                         zfcp_qdio_real_bytes(sg_resp);
 991
 992                 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
 993                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 994                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
 995                 return 0;
 996         }
 997
 998         /* use single, unchained SBAL if it can hold the request */
 999         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1000                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1001                                                 sg_req, sg_resp);
1002                 return 0;
1003         }
1004
1005         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1006                 return -EOPNOTSUPP;
1007
1008         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1009                 return -EIO;
1010
1011         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1012
1013         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1014         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1015
1016         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1017                 return -EIO;
1018
1019         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1020
1021         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1022
1023         return 0;
1024 }
1025
1026 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1027                                  struct scatterlist *sg_req,
1028                                  struct scatterlist *sg_resp,
1029                                  unsigned int timeout)
1030 {
1031         int ret;
1032
1033         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1034         if (ret)
1035                 return ret;
1036
1037         /* common settings for ct/gs and els requests */
1038         if (timeout > 255)
1039                 timeout = 255; /* max value accepted by hardware */
1040         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1041         req->qtcb->bottom.support.timeout = timeout;
1042         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1043
1044         return 0;
1045 }
1046
1047 /**
1048  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1049  * @ct: pointer to struct zfcp_send_ct with data for request
1050  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1051  */
1052 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1053                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1054                      unsigned int timeout)
1055 {
1056         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1057         struct zfcp_fsf_req *req;
1058         int ret = -EIO;
1059
1060         spin_lock_irq(&qdio->req_q_lock);
1061         if (zfcp_qdio_sbal_get(qdio))
1062                 goto out;
1063
1064         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1065                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1066
1067         if (IS_ERR(req)) {
1068                 ret = PTR_ERR(req);
1069                 goto out;
1070         }
1071
1072         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1073         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1074         if (ret)
1075                 goto failed_send;
1076
1077         req->handler = zfcp_fsf_send_ct_handler;
1078         req->qtcb->header.port_handle = wka_port->handle;
1079         ct->d_id = wka_port->d_id;
1080         req->data = ct;
1081
1082         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1083
1084         ret = zfcp_fsf_req_send(req);
1085         if (ret)
1086                 goto failed_send;
1087
1088         goto out;
1089
1090 failed_send:
1091         zfcp_fsf_req_free(req);
1092 out:
1093         spin_unlock_irq(&qdio->req_q_lock);
1094         return ret;
1095 }
1096
1097 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1098 {
1099         struct zfcp_fsf_ct_els *send_els = req->data;
1100         struct fsf_qtcb_header *header = &req->qtcb->header;
1101
1102         send_els->status = -EINVAL;
1103
1104         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1105                 goto skip_fsfstatus;
1106
1107         switch (header->fsf_status) {
1108         case FSF_GOOD:
1109                 send_els->status = 0;
1110                 zfcp_dbf_san_res("fsselh1", req);
1111                 break;
1112         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1113                 zfcp_fsf_class_not_supp(req);
1114                 break;
1115         case FSF_ADAPTER_STATUS_AVAILABLE:
1116                 switch (header->fsf_status_qual.word[0]){
1117                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1118                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1119                 case FSF_SQ_RETRY_IF_POSSIBLE:
1120                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1121                         break;
1122                 }
1123                 break;
1124         case FSF_ELS_COMMAND_REJECTED:
1125         case FSF_PAYLOAD_SIZE_MISMATCH:
1126         case FSF_REQUEST_SIZE_TOO_LARGE:
1127         case FSF_RESPONSE_SIZE_TOO_LARGE:
1128                 break;
1129         case FSF_SBAL_MISMATCH:
1130                 /* should never occur, avoided in zfcp_fsf_send_els */
1131                 /* fall through */
1132         default:
1133                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1134                 break;
1135         }
1136 skip_fsfstatus:
1137         if (send_els->handler)
1138                 send_els->handler(send_els->handler_data);
1139 }
1140
1141 /**
1142  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1143  * @els: pointer to struct zfcp_send_els with data for the command
1144  */
1145 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1146                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1147 {
1148         struct zfcp_fsf_req *req;
1149         struct zfcp_qdio *qdio = adapter->qdio;
1150         int ret = -EIO;
1151
1152         spin_lock_irq(&qdio->req_q_lock);
1153         if (zfcp_qdio_sbal_get(qdio))
1154                 goto out;
1155
1156         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1157                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1158
1159         if (IS_ERR(req)) {
1160                 ret = PTR_ERR(req);
1161                 goto out;
1162         }
1163
1164         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1165
1166         if (!zfcp_adapter_multi_buffer_active(adapter))
1167                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1168
1169         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1170
1171         if (ret)
1172                 goto failed_send;
1173
1174         hton24(req->qtcb->bottom.support.d_id, d_id);
1175         req->handler = zfcp_fsf_send_els_handler;
1176         els->d_id = d_id;
1177         req->data = els;
1178
1179         zfcp_dbf_san_req("fssels1", req, d_id);
1180
1181         ret = zfcp_fsf_req_send(req);
1182         if (ret)
1183                 goto failed_send;
1184
1185         goto out;
1186
1187 failed_send:
1188         zfcp_fsf_req_free(req);
1189 out:
1190         spin_unlock_irq(&qdio->req_q_lock);
1191         return ret;
1192 }
1193
1194 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1195 {
1196         struct zfcp_fsf_req *req;
1197         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1198         int retval = -EIO;
1199
1200         spin_lock_irq(&qdio->req_q_lock);
1201         if (zfcp_qdio_sbal_get(qdio))
1202                 goto out;
1203
1204         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1205                                   SBAL_SFLAGS0_TYPE_READ,
1206                                   qdio->adapter->pool.erp_req);
1207
1208         if (IS_ERR(req)) {
1209                 retval = PTR_ERR(req);
1210                 goto out;
1211         }
1212
1213         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1214         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1215
1216         req->qtcb->bottom.config.feature_selection =
1217                         FSF_FEATURE_NOTIFICATION_LOST |
1218                         FSF_FEATURE_UPDATE_ALERT;
1219         req->erp_action = erp_action;
1220         req->handler = zfcp_fsf_exchange_config_data_handler;
1221         erp_action->fsf_req_id = req->req_id;
1222
1223         zfcp_fsf_start_erp_timer(req);
1224         retval = zfcp_fsf_req_send(req);
1225         if (retval) {
1226                 zfcp_fsf_req_free(req);
1227                 erp_action->fsf_req_id = 0;
1228         }
1229 out:
1230         spin_unlock_irq(&qdio->req_q_lock);
1231         return retval;
1232 }
1233
1234 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1235                                        struct fsf_qtcb_bottom_config *data)
1236 {
1237         struct zfcp_fsf_req *req = NULL;
1238         int retval = -EIO;
1239
1240         spin_lock_irq(&qdio->req_q_lock);
1241         if (zfcp_qdio_sbal_get(qdio))
1242                 goto out_unlock;
1243
1244         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1245                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1246
1247         if (IS_ERR(req)) {
1248                 retval = PTR_ERR(req);
1249                 goto out_unlock;
1250         }
1251
1252         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1253         req->handler = zfcp_fsf_exchange_config_data_handler;
1254
1255         req->qtcb->bottom.config.feature_selection =
1256                         FSF_FEATURE_NOTIFICATION_LOST |
1257                         FSF_FEATURE_UPDATE_ALERT;
1258
1259         if (data)
1260                 req->data = data;
1261
1262         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1263         retval = zfcp_fsf_req_send(req);
1264         spin_unlock_irq(&qdio->req_q_lock);
1265         if (!retval)
1266                 wait_for_completion(&req->completion);
1267
1268         zfcp_fsf_req_free(req);
1269         return retval;
1270
1271 out_unlock:
1272         spin_unlock_irq(&qdio->req_q_lock);
1273         return retval;
1274 }
1275
1276 /**
1277  * zfcp_fsf_exchange_port_data - request information about local port
1278  * @erp_action: ERP action for the adapter for which port data is requested
1279  * Returns: 0 on success, error otherwise
1280  */
1281 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1282 {
1283         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1284         struct zfcp_fsf_req *req;
1285         int retval = -EIO;
1286
1287         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1288                 return -EOPNOTSUPP;
1289
1290         spin_lock_irq(&qdio->req_q_lock);
1291         if (zfcp_qdio_sbal_get(qdio))
1292                 goto out;
1293
1294         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1295                                   SBAL_SFLAGS0_TYPE_READ,
1296                                   qdio->adapter->pool.erp_req);
1297
1298         if (IS_ERR(req)) {
1299                 retval = PTR_ERR(req);
1300                 goto out;
1301         }
1302
1303         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1304         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1305
1306         req->handler = zfcp_fsf_exchange_port_data_handler;
1307         req->erp_action = erp_action;
1308         erp_action->fsf_req_id = req->req_id;
1309
1310         zfcp_fsf_start_erp_timer(req);
1311         retval = zfcp_fsf_req_send(req);
1312         if (retval) {
1313                 zfcp_fsf_req_free(req);
1314                 erp_action->fsf_req_id = 0;
1315         }
1316 out:
1317         spin_unlock_irq(&qdio->req_q_lock);
1318         return retval;
1319 }
1320
1321 /**
1322  * zfcp_fsf_exchange_port_data_sync - request information about local port
1323  * @qdio: pointer to struct zfcp_qdio
1324  * @data: pointer to struct fsf_qtcb_bottom_port
1325  * Returns: 0 on success, error otherwise
1326  */
1327 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1328                                      struct fsf_qtcb_bottom_port *data)
1329 {
1330         struct zfcp_fsf_req *req = NULL;
1331         int retval = -EIO;
1332
1333         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1334                 return -EOPNOTSUPP;
1335
1336         spin_lock_irq(&qdio->req_q_lock);
1337         if (zfcp_qdio_sbal_get(qdio))
1338                 goto out_unlock;
1339
1340         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1341                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1342
1343         if (IS_ERR(req)) {
1344                 retval = PTR_ERR(req);
1345                 goto out_unlock;
1346         }
1347
1348         if (data)
1349                 req->data = data;
1350
1351         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1352
1353         req->handler = zfcp_fsf_exchange_port_data_handler;
1354         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1355         retval = zfcp_fsf_req_send(req);
1356         spin_unlock_irq(&qdio->req_q_lock);
1357
1358         if (!retval)
1359                 wait_for_completion(&req->completion);
1360
1361         zfcp_fsf_req_free(req);
1362
1363         return retval;
1364
1365 out_unlock:
1366         spin_unlock_irq(&qdio->req_q_lock);
1367         return retval;
1368 }
1369
1370 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1371 {
1372         struct zfcp_port *port = req->data;
1373         struct fsf_qtcb_header *header = &req->qtcb->header;
1374         struct fc_els_flogi *plogi;
1375
1376         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1377                 goto out;
1378
1379         switch (header->fsf_status) {
1380         case FSF_PORT_ALREADY_OPEN:
1381                 break;
1382         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1383                 dev_warn(&req->adapter->ccw_device->dev,
1384                          "Not enough FCP adapter resources to open "
1385                          "remote port 0x%016Lx\n",
1386                          (unsigned long long)port->wwpn);
1387                 zfcp_erp_set_port_status(port,
1388                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1389                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1390                 break;
1391         case FSF_ADAPTER_STATUS_AVAILABLE:
1392                 switch (header->fsf_status_qual.word[0]) {
1393                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1394                         /* no zfcp_fc_test_link() with failed open port */
1395                         /* fall through */
1396                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1397                 case FSF_SQ_NO_RETRY_POSSIBLE:
1398                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1399                         break;
1400                 }
1401                 break;
1402         case FSF_GOOD:
1403                 port->handle = header->port_handle;
1404                 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1405                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1406                 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1407                                   &port->status);
1408                 /* check whether D_ID has changed during open */
1409                 /*
1410                  * FIXME: This check is not airtight, as the FCP channel does
1411                  * not monitor closures of target port connections caused on
1412                  * the remote side. Thus, they might miss out on invalidating
1413                  * locally cached WWPNs (and other N_Port parameters) of gone
1414                  * target ports. So, our heroic attempt to make things safe
1415                  * could be undermined by 'open port' response data tagged with
1416                  * obsolete WWPNs. Another reason to monitor potential
1417                  * connection closures ourself at least (by interpreting
1418                  * incoming ELS' and unsolicited status). It just crosses my
1419                  * mind that one should be able to cross-check by means of
1420                  * another GID_PN straight after a port has been opened.
1421                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1422                  */
1423                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1424                 if (req->qtcb->bottom.support.els1_length >=
1425                     FSF_PLOGI_MIN_LEN)
1426                                 zfcp_fc_plogi_evaluate(port, plogi);
1427                 break;
1428         case FSF_UNKNOWN_OP_SUBTYPE:
1429                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1430                 break;
1431         }
1432
1433 out:
1434         put_device(&port->dev);
1435 }
1436
1437 /**
1438  * zfcp_fsf_open_port - create and send open port request
1439  * @erp_action: pointer to struct zfcp_erp_action
1440  * Returns: 0 on success, error otherwise
1441  */
1442 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1443 {
1444         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1445         struct zfcp_port *port = erp_action->port;
1446         struct zfcp_fsf_req *req;
1447         int retval = -EIO;
1448
1449         spin_lock_irq(&qdio->req_q_lock);
1450         if (zfcp_qdio_sbal_get(qdio))
1451                 goto out;
1452
1453         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1454                                   SBAL_SFLAGS0_TYPE_READ,
1455                                   qdio->adapter->pool.erp_req);
1456
1457         if (IS_ERR(req)) {
1458                 retval = PTR_ERR(req);
1459                 goto out;
1460         }
1461
1462         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1463         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1464
1465         req->handler = zfcp_fsf_open_port_handler;
1466         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1467         req->data = port;
1468         req->erp_action = erp_action;
1469         erp_action->fsf_req_id = req->req_id;
1470         get_device(&port->dev);
1471
1472         zfcp_fsf_start_erp_timer(req);
1473         retval = zfcp_fsf_req_send(req);
1474         if (retval) {
1475                 zfcp_fsf_req_free(req);
1476                 erp_action->fsf_req_id = 0;
1477                 put_device(&port->dev);
1478         }
1479 out:
1480         spin_unlock_irq(&qdio->req_q_lock);
1481         return retval;
1482 }
1483
1484 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1485 {
1486         struct zfcp_port *port = req->data;
1487
1488         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1489                 return;
1490
1491         switch (req->qtcb->header.fsf_status) {
1492         case FSF_PORT_HANDLE_NOT_VALID:
1493                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1494                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1495                 break;
1496         case FSF_ADAPTER_STATUS_AVAILABLE:
1497                 break;
1498         case FSF_GOOD:
1499                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1500                 break;
1501         }
1502 }
1503
1504 /**
1505  * zfcp_fsf_close_port - create and send close port request
1506  * @erp_action: pointer to struct zfcp_erp_action
1507  * Returns: 0 on success, error otherwise
1508  */
1509 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1510 {
1511         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1512         struct zfcp_fsf_req *req;
1513         int retval = -EIO;
1514
1515         spin_lock_irq(&qdio->req_q_lock);
1516         if (zfcp_qdio_sbal_get(qdio))
1517                 goto out;
1518
1519         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1520                                   SBAL_SFLAGS0_TYPE_READ,
1521                                   qdio->adapter->pool.erp_req);
1522
1523         if (IS_ERR(req)) {
1524                 retval = PTR_ERR(req);
1525                 goto out;
1526         }
1527
1528         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1529         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1530
1531         req->handler = zfcp_fsf_close_port_handler;
1532         req->data = erp_action->port;
1533         req->erp_action = erp_action;
1534         req->qtcb->header.port_handle = erp_action->port->handle;
1535         erp_action->fsf_req_id = req->req_id;
1536
1537         zfcp_fsf_start_erp_timer(req);
1538         retval = zfcp_fsf_req_send(req);
1539         if (retval) {
1540                 zfcp_fsf_req_free(req);
1541                 erp_action->fsf_req_id = 0;
1542         }
1543 out:
1544         spin_unlock_irq(&qdio->req_q_lock);
1545         return retval;
1546 }
1547
1548 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1549 {
1550         struct zfcp_fc_wka_port *wka_port = req->data;
1551         struct fsf_qtcb_header *header = &req->qtcb->header;
1552
1553         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1554                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1555                 goto out;
1556         }
1557
1558         switch (header->fsf_status) {
1559         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1560                 dev_warn(&req->adapter->ccw_device->dev,
1561                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1562                 /* fall through */
1563         case FSF_ADAPTER_STATUS_AVAILABLE:
1564                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1565                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1566                 break;
1567         case FSF_GOOD:
1568                 wka_port->handle = header->port_handle;
1569                 /* fall through */
1570         case FSF_PORT_ALREADY_OPEN:
1571                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1572         }
1573 out:
1574         wake_up(&wka_port->completion_wq);
1575 }
1576
1577 /**
1578  * zfcp_fsf_open_wka_port - create and send open wka-port request
1579  * @wka_port: pointer to struct zfcp_fc_wka_port
1580  * Returns: 0 on success, error otherwise
1581  */
1582 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1583 {
1584         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1585         struct zfcp_fsf_req *req;
1586         int retval = -EIO;
1587
1588         spin_lock_irq(&qdio->req_q_lock);
1589         if (zfcp_qdio_sbal_get(qdio))
1590                 goto out;
1591
1592         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1593                                   SBAL_SFLAGS0_TYPE_READ,
1594                                   qdio->adapter->pool.erp_req);
1595
1596         if (IS_ERR(req)) {
1597                 retval = PTR_ERR(req);
1598                 goto out;
1599         }
1600
1601         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1602         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1603
1604         req->handler = zfcp_fsf_open_wka_port_handler;
1605         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1606         req->data = wka_port;
1607
1608         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1609         retval = zfcp_fsf_req_send(req);
1610         if (retval)
1611                 zfcp_fsf_req_free(req);
1612 out:
1613         spin_unlock_irq(&qdio->req_q_lock);
1614         if (!retval)
1615                 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id);
1616         return retval;
1617 }
1618
1619 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1620 {
1621         struct zfcp_fc_wka_port *wka_port = req->data;
1622
1623         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1624                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1625                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1626         }
1627
1628         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1629         wake_up(&wka_port->completion_wq);
1630 }
1631
1632 /**
1633  * zfcp_fsf_close_wka_port - create and send close wka port request
1634  * @wka_port: WKA port to open
1635  * Returns: 0 on success, error otherwise
1636  */
1637 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1638 {
1639         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1640         struct zfcp_fsf_req *req;
1641         int retval = -EIO;
1642
1643         spin_lock_irq(&qdio->req_q_lock);
1644         if (zfcp_qdio_sbal_get(qdio))
1645                 goto out;
1646
1647         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1648                                   SBAL_SFLAGS0_TYPE_READ,
1649                                   qdio->adapter->pool.erp_req);
1650
1651         if (IS_ERR(req)) {
1652                 retval = PTR_ERR(req);
1653                 goto out;
1654         }
1655
1656         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1657         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1658
1659         req->handler = zfcp_fsf_close_wka_port_handler;
1660         req->data = wka_port;
1661         req->qtcb->header.port_handle = wka_port->handle;
1662
1663         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1664         retval = zfcp_fsf_req_send(req);
1665         if (retval)
1666                 zfcp_fsf_req_free(req);
1667 out:
1668         spin_unlock_irq(&qdio->req_q_lock);
1669         if (!retval)
1670                 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id);
1671         return retval;
1672 }
1673
1674 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1675 {
1676         struct zfcp_port *port = req->data;
1677         struct fsf_qtcb_header *header = &req->qtcb->header;
1678         struct scsi_device *sdev;
1679
1680         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1681                 return;
1682
1683         switch (header->fsf_status) {
1684         case FSF_PORT_HANDLE_NOT_VALID:
1685                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1686                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1687                 break;
1688         case FSF_PORT_BOXED:
1689                 /* can't use generic zfcp_erp_modify_port_status because
1690                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1691                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1692                 shost_for_each_device(sdev, port->adapter->scsi_host)
1693                         if (sdev_to_zfcp(sdev)->port == port)
1694                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1695                                                   &sdev_to_zfcp(sdev)->status);
1696                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1697                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1698                                      "fscpph2");
1699                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1700                 break;
1701         case FSF_ADAPTER_STATUS_AVAILABLE:
1702                 switch (header->fsf_status_qual.word[0]) {
1703                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1704                         /* fall through */
1705                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1706                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1707                         break;
1708                 }
1709                 break;
1710         case FSF_GOOD:
1711                 /* can't use generic zfcp_erp_modify_port_status because
1712                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1713                  */
1714                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1715                 shost_for_each_device(sdev, port->adapter->scsi_host)
1716                         if (sdev_to_zfcp(sdev)->port == port)
1717                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1718                                                   &sdev_to_zfcp(sdev)->status);
1719                 break;
1720         }
1721 }
1722
1723 /**
1724  * zfcp_fsf_close_physical_port - close physical port
1725  * @erp_action: pointer to struct zfcp_erp_action
1726  * Returns: 0 on success
1727  */
1728 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1729 {
1730         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1731         struct zfcp_fsf_req *req;
1732         int retval = -EIO;
1733
1734         spin_lock_irq(&qdio->req_q_lock);
1735         if (zfcp_qdio_sbal_get(qdio))
1736                 goto out;
1737
1738         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1739                                   SBAL_SFLAGS0_TYPE_READ,
1740                                   qdio->adapter->pool.erp_req);
1741
1742         if (IS_ERR(req)) {
1743                 retval = PTR_ERR(req);
1744                 goto out;
1745         }
1746
1747         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1748         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1749
1750         req->data = erp_action->port;
1751         req->qtcb->header.port_handle = erp_action->port->handle;
1752         req->erp_action = erp_action;
1753         req->handler = zfcp_fsf_close_physical_port_handler;
1754         erp_action->fsf_req_id = req->req_id;
1755
1756         zfcp_fsf_start_erp_timer(req);
1757         retval = zfcp_fsf_req_send(req);
1758         if (retval) {
1759                 zfcp_fsf_req_free(req);
1760                 erp_action->fsf_req_id = 0;
1761         }
1762 out:
1763         spin_unlock_irq(&qdio->req_q_lock);
1764         return retval;
1765 }
1766
1767 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1768 {
1769         struct zfcp_adapter *adapter = req->adapter;
1770         struct scsi_device *sdev = req->data;
1771         struct zfcp_scsi_dev *zfcp_sdev;
1772         struct fsf_qtcb_header *header = &req->qtcb->header;
1773         union fsf_status_qual *qual = &header->fsf_status_qual;
1774
1775         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1776                 return;
1777
1778         zfcp_sdev = sdev_to_zfcp(sdev);
1779
1780         atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1781                           ZFCP_STATUS_COMMON_ACCESS_BOXED,
1782                           &zfcp_sdev->status);
1783
1784         switch (header->fsf_status) {
1785
1786         case FSF_PORT_HANDLE_NOT_VALID:
1787                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1788                 /* fall through */
1789         case FSF_LUN_ALREADY_OPEN:
1790                 break;
1791         case FSF_PORT_BOXED:
1792                 zfcp_erp_set_port_status(zfcp_sdev->port,
1793                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1794                 zfcp_erp_port_reopen(zfcp_sdev->port,
1795                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1796                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1797                 break;
1798         case FSF_LUN_SHARING_VIOLATION:
1799                 if (qual->word[0])
1800                         dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1801                                  "LUN 0x%Lx on port 0x%Lx is already in "
1802                                  "use by CSS%d, MIF Image ID %x\n",
1803                                  zfcp_scsi_dev_lun(sdev),
1804                                  (unsigned long long)zfcp_sdev->port->wwpn,
1805                                  qual->fsf_queue_designator.cssid,
1806                                  qual->fsf_queue_designator.hla);
1807                 zfcp_erp_set_lun_status(sdev,
1808                                         ZFCP_STATUS_COMMON_ERP_FAILED |
1809                                         ZFCP_STATUS_COMMON_ACCESS_DENIED);
1810                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1811                 break;
1812         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1813                 dev_warn(&adapter->ccw_device->dev,
1814                          "No handle is available for LUN "
1815                          "0x%016Lx on port 0x%016Lx\n",
1816                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1817                          (unsigned long long)zfcp_sdev->port->wwpn);
1818                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1819                 /* fall through */
1820         case FSF_INVALID_COMMAND_OPTION:
1821                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1822                 break;
1823         case FSF_ADAPTER_STATUS_AVAILABLE:
1824                 switch (header->fsf_status_qual.word[0]) {
1825                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1826                         zfcp_fc_test_link(zfcp_sdev->port);
1827                         /* fall through */
1828                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1829                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1830                         break;
1831                 }
1832                 break;
1833
1834         case FSF_GOOD:
1835                 zfcp_sdev->lun_handle = header->lun_handle;
1836                 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1837                 break;
1838         }
1839 }
1840
1841 /**
1842  * zfcp_fsf_open_lun - open LUN
1843  * @erp_action: pointer to struct zfcp_erp_action
1844  * Returns: 0 on success, error otherwise
1845  */
1846 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1847 {
1848         struct zfcp_adapter *adapter = erp_action->adapter;
1849         struct zfcp_qdio *qdio = adapter->qdio;
1850         struct zfcp_fsf_req *req;
1851         int retval = -EIO;
1852
1853         spin_lock_irq(&qdio->req_q_lock);
1854         if (zfcp_qdio_sbal_get(qdio))
1855                 goto out;
1856
1857         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1858                                   SBAL_SFLAGS0_TYPE_READ,
1859                                   adapter->pool.erp_req);
1860
1861         if (IS_ERR(req)) {
1862                 retval = PTR_ERR(req);
1863                 goto out;
1864         }
1865
1866         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1867         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1868
1869         req->qtcb->header.port_handle = erp_action->port->handle;
1870         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1871         req->handler = zfcp_fsf_open_lun_handler;
1872         req->data = erp_action->sdev;
1873         req->erp_action = erp_action;
1874         erp_action->fsf_req_id = req->req_id;
1875
1876         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1877                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1878
1879         zfcp_fsf_start_erp_timer(req);
1880         retval = zfcp_fsf_req_send(req);
1881         if (retval) {
1882                 zfcp_fsf_req_free(req);
1883                 erp_action->fsf_req_id = 0;
1884         }
1885 out:
1886         spin_unlock_irq(&qdio->req_q_lock);
1887         return retval;
1888 }
1889
1890 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1891 {
1892         struct scsi_device *sdev = req->data;
1893         struct zfcp_scsi_dev *zfcp_sdev;
1894
1895         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1896                 return;
1897
1898         zfcp_sdev = sdev_to_zfcp(sdev);
1899
1900         switch (req->qtcb->header.fsf_status) {
1901         case FSF_PORT_HANDLE_NOT_VALID:
1902                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1903                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1904                 break;
1905         case FSF_LUN_HANDLE_NOT_VALID:
1906                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1907                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1908                 break;
1909         case FSF_PORT_BOXED:
1910                 zfcp_erp_set_port_status(zfcp_sdev->port,
1911                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1912                 zfcp_erp_port_reopen(zfcp_sdev->port,
1913                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1914                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1915                 break;
1916         case FSF_ADAPTER_STATUS_AVAILABLE:
1917                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1918                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1919                         zfcp_fc_test_link(zfcp_sdev->port);
1920                         /* fall through */
1921                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1922                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1923                         break;
1924                 }
1925                 break;
1926         case FSF_GOOD:
1927                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1928                 break;
1929         }
1930 }
1931
1932 /**
1933  * zfcp_fsf_close_LUN - close LUN
1934  * @erp_action: pointer to erp_action triggering the "close LUN"
1935  * Returns: 0 on success, error otherwise
1936  */
1937 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1938 {
1939         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1940         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1941         struct zfcp_fsf_req *req;
1942         int retval = -EIO;
1943
1944         spin_lock_irq(&qdio->req_q_lock);
1945         if (zfcp_qdio_sbal_get(qdio))
1946                 goto out;
1947
1948         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1949                                   SBAL_SFLAGS0_TYPE_READ,
1950                                   qdio->adapter->pool.erp_req);
1951
1952         if (IS_ERR(req)) {
1953                 retval = PTR_ERR(req);
1954                 goto out;
1955         }
1956
1957         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1958         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1959
1960         req->qtcb->header.port_handle = erp_action->port->handle;
1961         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1962         req->handler = zfcp_fsf_close_lun_handler;
1963         req->data = erp_action->sdev;
1964         req->erp_action = erp_action;
1965         erp_action->fsf_req_id = req->req_id;
1966
1967         zfcp_fsf_start_erp_timer(req);
1968         retval = zfcp_fsf_req_send(req);
1969         if (retval) {
1970                 zfcp_fsf_req_free(req);
1971                 erp_action->fsf_req_id = 0;
1972         }
1973 out:
1974         spin_unlock_irq(&qdio->req_q_lock);
1975         return retval;
1976 }
1977
1978 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1979 {
1980         lat_rec->sum += lat;
1981         lat_rec->min = min(lat_rec->min, lat);
1982         lat_rec->max = max(lat_rec->max, lat);
1983 }
1984
1985 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
1986 {
1987         struct fsf_qual_latency_info *lat_in;
1988         struct latency_cont *lat = NULL;
1989         struct zfcp_scsi_dev *zfcp_sdev;
1990         struct zfcp_blk_drv_data blktrc;
1991         int ticks = req->adapter->timer_ticks;
1992
1993         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
1994
1995         blktrc.flags = 0;
1996         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
1997         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1998                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
1999         blktrc.inb_usage = 0;
2000         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2001
2002         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2003             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2004                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2005                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2006                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2007                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2008
2009                 switch (req->qtcb->bottom.io.data_direction) {
2010                 case FSF_DATADIR_DIF_READ_STRIP:
2011                 case FSF_DATADIR_DIF_READ_CONVERT:
2012                 case FSF_DATADIR_READ:
2013                         lat = &zfcp_sdev->latencies.read;
2014                         break;
2015                 case FSF_DATADIR_DIF_WRITE_INSERT:
2016                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2017                 case FSF_DATADIR_WRITE:
2018                         lat = &zfcp_sdev->latencies.write;
2019                         break;
2020                 case FSF_DATADIR_CMND:
2021                         lat = &zfcp_sdev->latencies.cmd;
2022                         break;
2023                 }
2024
2025                 if (lat) {
2026                         spin_lock(&zfcp_sdev->latencies.lock);
2027                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2028                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2029                         lat->counter++;
2030                         spin_unlock(&zfcp_sdev->latencies.lock);
2031                 }
2032         }
2033
2034         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2035                             sizeof(blktrc));
2036 }
2037
2038 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2039 {
2040         struct scsi_cmnd *scmnd = req->data;
2041         struct scsi_device *sdev = scmnd->device;
2042         struct zfcp_scsi_dev *zfcp_sdev;
2043         struct fsf_qtcb_header *header = &req->qtcb->header;
2044
2045         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2046                 return;
2047
2048         zfcp_sdev = sdev_to_zfcp(sdev);
2049
2050         switch (header->fsf_status) {
2051         case FSF_HANDLE_MISMATCH:
2052         case FSF_PORT_HANDLE_NOT_VALID:
2053                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2054                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2055                 break;
2056         case FSF_FCPLUN_NOT_VALID:
2057         case FSF_LUN_HANDLE_NOT_VALID:
2058                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2059                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2060                 break;
2061         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2062                 zfcp_fsf_class_not_supp(req);
2063                 break;
2064         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2065                 dev_err(&req->adapter->ccw_device->dev,
2066                         "Incorrect direction %d, LUN 0x%016Lx on port "
2067                         "0x%016Lx closed\n",
2068                         req->qtcb->bottom.io.data_direction,
2069                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2070                         (unsigned long long)zfcp_sdev->port->wwpn);
2071                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2072                                           "fssfch3");
2073                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2074                 break;
2075         case FSF_CMND_LENGTH_NOT_VALID:
2076                 dev_err(&req->adapter->ccw_device->dev,
2077                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2078                         "port 0x%016Lx closed\n",
2079                         req->qtcb->bottom.io.fcp_cmnd_length,
2080                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2081                         (unsigned long long)zfcp_sdev->port->wwpn);
2082                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2083                                           "fssfch4");
2084                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2085                 break;
2086         case FSF_PORT_BOXED:
2087                 zfcp_erp_set_port_status(zfcp_sdev->port,
2088                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2089                 zfcp_erp_port_reopen(zfcp_sdev->port,
2090                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2091                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2092                 break;
2093         case FSF_LUN_BOXED:
2094                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2095                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2096                                     "fssfch6");
2097                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2098                 break;
2099         case FSF_ADAPTER_STATUS_AVAILABLE:
2100                 if (header->fsf_status_qual.word[0] ==
2101                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2102                         zfcp_fc_test_link(zfcp_sdev->port);
2103                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2104                 break;
2105         }
2106 }
2107
2108 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2109 {
2110         struct scsi_cmnd *scpnt;
2111         struct fcp_resp_with_ext *fcp_rsp;
2112         unsigned long flags;
2113
2114         read_lock_irqsave(&req->adapter->abort_lock, flags);
2115
2116         scpnt = req->data;
2117         if (unlikely(!scpnt)) {
2118                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2119                 return;
2120         }
2121
2122         zfcp_fsf_fcp_handler_common(req);
2123
2124         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2125                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2126                 goto skip_fsfstatus;
2127         }
2128
2129         switch (req->qtcb->header.fsf_status) {
2130         case FSF_INCONSISTENT_PROT_DATA:
2131         case FSF_INVALID_PROT_PARM:
2132                 set_host_byte(scpnt, DID_ERROR);
2133                 goto skip_fsfstatus;
2134         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2135                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2136                 goto skip_fsfstatus;
2137         case FSF_APP_TAG_CHECK_FAILURE:
2138                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2139                 goto skip_fsfstatus;
2140         case FSF_REF_TAG_CHECK_FAILURE:
2141                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2142                 goto skip_fsfstatus;
2143         }
2144         BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2145         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2146         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2147
2148 skip_fsfstatus:
2149         zfcp_fsf_req_trace(req, scpnt);
2150         zfcp_dbf_scsi_result(scpnt, req);
2151
2152         scpnt->host_scribble = NULL;
2153         (scpnt->scsi_done) (scpnt);
2154         /*
2155          * We must hold this lock until scsi_done has been called.
2156          * Otherwise we may call scsi_done after abort regarding this
2157          * command has completed.
2158          * Note: scsi_done must not block!
2159          */
2160         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2161 }
2162
2163 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2164 {
2165         switch (scsi_get_prot_op(scsi_cmnd)) {
2166         case SCSI_PROT_NORMAL:
2167                 switch (scsi_cmnd->sc_data_direction) {
2168                 case DMA_NONE:
2169                         *data_dir = FSF_DATADIR_CMND;
2170                         break;
2171                 case DMA_FROM_DEVICE:
2172                         *data_dir = FSF_DATADIR_READ;
2173                         break;
2174                 case DMA_TO_DEVICE:
2175                         *data_dir = FSF_DATADIR_WRITE;
2176                         break;
2177                 case DMA_BIDIRECTIONAL:
2178                         return -EINVAL;
2179                 }
2180                 break;
2181
2182         case SCSI_PROT_READ_STRIP:
2183                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2184                 break;
2185         case SCSI_PROT_WRITE_INSERT:
2186                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2187                 break;
2188         case SCSI_PROT_READ_PASS:
2189                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2190                 break;
2191         case SCSI_PROT_WRITE_PASS:
2192                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2193                 break;
2194         default:
2195                 return -EINVAL;
2196         }
2197
2198         return 0;
2199 }
2200
2201 /**
2202  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2203  * @scsi_cmnd: scsi command to be sent
2204  */
2205 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2206 {
2207         struct zfcp_fsf_req *req;
2208         struct fcp_cmnd *fcp_cmnd;
2209         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2210         int retval = -EIO;
2211         struct scsi_device *sdev = scsi_cmnd->device;
2212         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2213         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2214         struct zfcp_qdio *qdio = adapter->qdio;
2215         struct fsf_qtcb_bottom_io *io;
2216         unsigned long flags;
2217
2218         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2219                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2220                 return -EBUSY;
2221
2222         spin_lock_irqsave(&qdio->req_q_lock, flags);
2223         if (atomic_read(&qdio->req_q_free) <= 0) {
2224                 atomic_inc(&qdio->req_q_full);
2225                 goto out;
2226         }
2227
2228         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2229                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2230
2231         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2232                                   sbtype, adapter->pool.scsi_req);
2233
2234         if (IS_ERR(req)) {
2235                 retval = PTR_ERR(req);
2236                 goto out;
2237         }
2238
2239         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2240
2241         io = &req->qtcb->bottom.io;
2242         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2243         req->data = scsi_cmnd;
2244         req->handler = zfcp_fsf_fcp_cmnd_handler;
2245         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2246         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2247         io->service_class = FSF_CLASS_3;
2248         io->fcp_cmnd_length = FCP_CMND_LEN;
2249
2250         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2251                 io->data_block_length = scsi_cmnd->device->sector_size;
2252                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2253         }
2254
2255         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2256                 goto failed_scsi_cmnd;
2257
2258         BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2259         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2260         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2261
2262         if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2263             scsi_prot_sg_count(scsi_cmnd)) {
2264                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2265                                        scsi_prot_sg_count(scsi_cmnd));
2266                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2267                                                  scsi_prot_sglist(scsi_cmnd));
2268                 if (retval)
2269                         goto failed_scsi_cmnd;
2270                 io->prot_data_length = zfcp_qdio_real_bytes(
2271                                                 scsi_prot_sglist(scsi_cmnd));
2272         }
2273
2274         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2275                                          scsi_sglist(scsi_cmnd));
2276         if (unlikely(retval))
2277                 goto failed_scsi_cmnd;
2278
2279         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2280         if (zfcp_adapter_multi_buffer_active(adapter))
2281                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2282
2283         retval = zfcp_fsf_req_send(req);
2284         if (unlikely(retval))
2285                 goto failed_scsi_cmnd;
2286
2287         goto out;
2288
2289 failed_scsi_cmnd:
2290         zfcp_fsf_req_free(req);
2291         scsi_cmnd->host_scribble = NULL;
2292 out:
2293         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2294         return retval;
2295 }
2296
2297 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2298 {
2299         struct fcp_resp_with_ext *fcp_rsp;
2300         struct fcp_resp_rsp_info *rsp_info;
2301
2302         zfcp_fsf_fcp_handler_common(req);
2303
2304         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2305         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2306
2307         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2308              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2309                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2310 }
2311
2312 /**
2313  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2314  * @scmnd: SCSI command to send the task management command for
2315  * @tm_flags: unsigned byte for task management flags
2316  * Returns: on success pointer to struct fsf_req, NULL otherwise
2317  */
2318 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2319                                             u8 tm_flags)
2320 {
2321         struct zfcp_fsf_req *req = NULL;
2322         struct fcp_cmnd *fcp_cmnd;
2323         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2324         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2325
2326         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2327                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2328                 return NULL;
2329
2330         spin_lock_irq(&qdio->req_q_lock);
2331         if (zfcp_qdio_sbal_get(qdio))
2332                 goto out;
2333
2334         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2335                                   SBAL_SFLAGS0_TYPE_WRITE,
2336                                   qdio->adapter->pool.scsi_req);
2337
2338         if (IS_ERR(req)) {
2339                 req = NULL;
2340                 goto out;
2341         }
2342
2343         req->data = scmnd;
2344         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2345         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2346         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2347         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2348         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2349         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2350
2351         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2352
2353         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2354         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2355
2356         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2357         if (!zfcp_fsf_req_send(req))
2358                 goto out;
2359
2360         zfcp_fsf_req_free(req);
2361         req = NULL;
2362 out:
2363         spin_unlock_irq(&qdio->req_q_lock);
2364         return req;
2365 }
2366
2367 /**
2368  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2369  * @adapter: pointer to struct zfcp_adapter
2370  * @sbal_idx: response queue index of SBAL to be processed
2371  */
2372 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2373 {
2374         struct zfcp_adapter *adapter = qdio->adapter;
2375         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2376         struct qdio_buffer_element *sbale;
2377         struct zfcp_fsf_req *fsf_req;
2378         unsigned long req_id;
2379         int idx;
2380
2381         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2382
2383                 sbale = &sbal->element[idx];
2384                 req_id = (unsigned long) sbale->addr;
2385                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2386
2387                 if (!fsf_req) {
2388                         /*
2389                          * Unknown request means that we have potentially memory
2390                          * corruption and must stop the machine immediately.
2391                          */
2392                         zfcp_qdio_siosl(adapter);
2393                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2394                               req_id, dev_name(&adapter->ccw_device->dev));
2395                 }
2396
2397                 zfcp_fsf_req_complete(fsf_req);
2398
2399                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2400                         break;
2401         }
2402 }