drivers/s390/scsi/zfcp_fsf.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * zfcp device driver
   4  *
   5  * Implementation of FSF commands.
   6  *
   7  * Copyright IBM Corp. 2002, 2017
   8  */
   9
  10 #define KMSG_COMPONENT "zfcp"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/blktrace_api.h>
  14 #include <linux/slab.h>
  15 #include <scsi/fc/fc_els.h>
  16 #include "zfcp_ext.h"
  17 #include "zfcp_fc.h"
  18 #include "zfcp_dbf.h"
  19 #include "zfcp_qdio.h"
  20 #include "zfcp_reqlist.h"
  21
  22 struct kmem_cache *zfcp_fsf_qtcb_cache;
  23
  24 static bool ber_stop = true;
  25 module_param(ber_stop, bool, 0600);
  26 MODULE_PARM_DESC(ber_stop,
  27                  "Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)");
  28
  29 static void zfcp_fsf_request_timeout_handler(unsigned long data)
  30 {
  31         struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
  32         zfcp_qdio_siosl(adapter);
  33         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  34                                 "fsrth_1");
  35 }
  36
  37 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  38                                  unsigned long timeout)
  39 {
  40         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  41         fsf_req->timer.data = (unsigned long) fsf_req->adapter;
  42         fsf_req->timer.expires = jiffies + timeout;
  43         add_timer(&fsf_req->timer);
  44 }
  45
  46 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  47 {
  48         BUG_ON(!fsf_req->erp_action);
  49         fsf_req->timer.function = zfcp_erp_timeout_handler;
  50         fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
  51         fsf_req->timer.expires = jiffies + 30 * HZ;
  52         add_timer(&fsf_req->timer);
  53 }
  54
  55 /* association between FSF command and FSF QTCB type */
  56 static u32 fsf_qtcb_type[] = {
  57         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  58         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  59         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  60         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  61         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  62         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  63         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  64         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  65         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  66         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  67         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  68         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  69         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  70 };
  71
  72 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  73 {
  74         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  75                 "operational because of an unsupported FC class\n");
  76         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  77         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  78 }
  79
  80 /**
  81  * zfcp_fsf_req_free - free memory used by fsf request
  82  * @fsf_req: pointer to struct zfcp_fsf_req
  83  */
  84 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  85 {
  86         if (likely(req->pool)) {
  87                 if (likely(req->qtcb))
  88                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  89                 mempool_free(req, req->pool);
  90                 return;
  91         }
  92
  93         if (likely(req->qtcb))
  94                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
  95         kfree(req);
  96 }
  97
  98 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
  99 {
 100         unsigned long flags;
 101         struct fsf_status_read_buffer *sr_buf = req->data;
 102         struct zfcp_adapter *adapter = req->adapter;
 103         struct zfcp_port *port;
 104         int d_id = ntoh24(sr_buf->d_id);
 105
 106         read_lock_irqsave(&adapter->port_list_lock, flags);
 107         list_for_each_entry(port, &adapter->port_list, list)
 108                 if (port->d_id == d_id) {
 109                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 110                         break;
 111                 }
 112         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 113 }
 114
 115 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 116                                          struct fsf_link_down_info *link_down)
 117 {
 118         struct zfcp_adapter *adapter = req->adapter;
 119
 120         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 121                 return;
 122
 123         atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 124
 125         zfcp_scsi_schedule_rports_block(adapter);
 126
 127         if (!link_down)
 128                 goto out;
 129
 130         switch (link_down->error_code) {
 131         case FSF_PSQ_LINK_NO_LIGHT:
 132                 dev_warn(&req->adapter->ccw_device->dev,
 133                          "There is no light signal from the local "
 134                          "fibre channel cable\n");
 135                 break;
 136         case FSF_PSQ_LINK_WRAP_PLUG:
 137                 dev_warn(&req->adapter->ccw_device->dev,
 138                          "There is a wrap plug instead of a fibre "
 139                          "channel cable\n");
 140                 break;
 141         case FSF_PSQ_LINK_NO_FCP:
 142                 dev_warn(&req->adapter->ccw_device->dev,
 143                          "The adjacent fibre channel node does not "
 144                          "support FCP\n");
 145                 break;
 146         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 147                 dev_warn(&req->adapter->ccw_device->dev,
 148                          "The FCP device is suspended because of a "
 149                          "firmware update\n");
 150                 break;
 151         case FSF_PSQ_LINK_INVALID_WWPN:
 152                 dev_warn(&req->adapter->ccw_device->dev,
 153                          "The FCP device detected a WWPN that is "
 154                          "duplicate or not valid\n");
 155                 break;
 156         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 157                 dev_warn(&req->adapter->ccw_device->dev,
 158                          "The fibre channel fabric does not support NPIV\n");
 159                 break;
 160         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 161                 dev_warn(&req->adapter->ccw_device->dev,
 162                          "The FCP adapter cannot support more NPIV ports\n");
 163                 break;
 164         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 165                 dev_warn(&req->adapter->ccw_device->dev,
 166                          "The adjacent switch cannot support "
 167                          "more NPIV ports\n");
 168                 break;
 169         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 170                 dev_warn(&req->adapter->ccw_device->dev,
 171                          "The FCP adapter could not log in to the "
 172                          "fibre channel fabric\n");
 173                 break;
 174         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 175                 dev_warn(&req->adapter->ccw_device->dev,
 176                          "The WWPN assignment file on the FCP adapter "
 177                          "has been damaged\n");
 178                 break;
 179         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 180                 dev_warn(&req->adapter->ccw_device->dev,
 181                          "The mode table on the FCP adapter "
 182                          "has been damaged\n");
 183                 break;
 184         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 185                 dev_warn(&req->adapter->ccw_device->dev,
 186                          "All NPIV ports on the FCP adapter have "
 187                          "been assigned\n");
 188                 break;
 189         default:
 190                 dev_warn(&req->adapter->ccw_device->dev,
 191                          "The link between the FCP adapter and "
 192                          "the FC fabric is down\n");
 193         }
 194 out:
 195         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 196 }
 197
 198 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 199 {
 200         struct fsf_status_read_buffer *sr_buf = req->data;
 201         struct fsf_link_down_info *ldi =
 202                 (struct fsf_link_down_info *) &sr_buf->payload;
 203
 204         switch (sr_buf->status_subtype) {
 205         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 206         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 207                 zfcp_fsf_link_down_info_eval(req, ldi);
 208                 break;
 209         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 210                 zfcp_fsf_link_down_info_eval(req, NULL);
 211         }
 212 }
 213
 214 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 215 {
 216         struct zfcp_adapter *adapter = req->adapter;
 217         struct fsf_status_read_buffer *sr_buf = req->data;
 218
 219         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 220                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 221                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 222                 zfcp_fsf_req_free(req);
 223                 return;
 224         }
 225
 226         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 227
 228         switch (sr_buf->status_type) {
 229         case FSF_STATUS_READ_PORT_CLOSED:
 230                 zfcp_fsf_status_read_port_closed(req);
 231                 break;
 232         case FSF_STATUS_READ_INCOMING_ELS:
 233                 zfcp_fc_incoming_els(req);
 234                 break;
 235         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 236                 break;
 237         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 238                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 239                 if (ber_stop) {
 240                         dev_warn(&adapter->ccw_device->dev,
 241                                  "All paths over this FCP device are disused because of excessive bit errors\n");
 242                         zfcp_erp_adapter_shutdown(adapter, 0, "fssrh_b");
 243                 } else {
 244                         dev_warn(&adapter->ccw_device->dev,
 245                                  "The error threshold for checksum statistics has been exceeded\n");
 246                 }
 247                 break;
 248         case FSF_STATUS_READ_LINK_DOWN:
 249                 zfcp_fsf_status_read_link_down(req);
 250                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 251                 break;
 252         case FSF_STATUS_READ_LINK_UP:
 253                 dev_info(&adapter->ccw_device->dev,
 254                          "The local link has been restored\n");
 255                 /* All ports should be marked as ready to run again */
 256                 zfcp_erp_set_adapter_status(adapter,
 257                                             ZFCP_STATUS_COMMON_RUNNING);
 258                 zfcp_erp_adapter_reopen(adapter,
 259                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 260                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 261                                         "fssrh_2");
 262                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 263
 264                 break;
 265         case FSF_STATUS_READ_NOTIFICATION_LOST:
 266                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 267                         zfcp_fc_conditional_port_scan(adapter);
 268                 break;
 269         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 270                 adapter->adapter_features = sr_buf->payload.word[0];
 271                 break;
 272         }
 273
 274         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 275         zfcp_fsf_req_free(req);
 276
 277         atomic_inc(&adapter->stat_miss);
 278         queue_work(adapter->work_queue, &adapter->stat_work);
 279 }
 280
 281 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 282 {
 283         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 284         case FSF_SQ_FCP_RSP_AVAILABLE:
 285         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 286         case FSF_SQ_NO_RETRY_POSSIBLE:
 287         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 288                 return;
 289         case FSF_SQ_COMMAND_ABORTED:
 290                 break;
 291         case FSF_SQ_NO_RECOM:
 292                 dev_err(&req->adapter->ccw_device->dev,
 293                         "The FCP adapter reported a problem "
 294                         "that cannot be recovered\n");
 295                 zfcp_qdio_siosl(req->adapter);
 296                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 297                 break;
 298         }
 299         /* all non-return stats set FSFREQ_ERROR*/
 300         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 301 }
 302
 303 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 304 {
 305         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 306                 return;
 307
 308         switch (req->qtcb->header.fsf_status) {
 309         case FSF_UNKNOWN_COMMAND:
 310                 dev_err(&req->adapter->ccw_device->dev,
 311                         "The FCP adapter does not recognize the command 0x%x\n",
 312                         req->qtcb->header.fsf_command);
 313                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 314                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 315                 break;
 316         case FSF_ADAPTER_STATUS_AVAILABLE:
 317                 zfcp_fsf_fsfstatus_qual_eval(req);
 318                 break;
 319         }
 320 }
 321
 322 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 323 {
 324         struct zfcp_adapter *adapter = req->adapter;
 325         struct fsf_qtcb *qtcb = req->qtcb;
 326         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 327
 328         zfcp_dbf_hba_fsf_response(req);
 329
 330         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 331                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 332                 return;
 333         }
 334
 335         switch (qtcb->prefix.prot_status) {
 336         case FSF_PROT_GOOD:
 337         case FSF_PROT_FSF_STATUS_PRESENTED:
 338                 return;
 339         case FSF_PROT_QTCB_VERSION_ERROR:
 340                 dev_err(&adapter->ccw_device->dev,
 341                         "QTCB version 0x%x not supported by FCP adapter "
 342                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 343                         psq->word[0], psq->word[1]);
 344                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 345                 break;
 346         case FSF_PROT_ERROR_STATE:
 347         case FSF_PROT_SEQ_NUMB_ERROR:
 348                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 349                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 350                 break;
 351         case FSF_PROT_UNSUPP_QTCB_TYPE:
 352                 dev_err(&adapter->ccw_device->dev,
 353                         "The QTCB type is not supported by the FCP adapter\n");
 354                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 355                 break;
 356         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 357                 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 358                                 &adapter->status);
 359                 break;
 360         case FSF_PROT_DUPLICATE_REQUEST_ID:
 361                 dev_err(&adapter->ccw_device->dev,
 362                         "0x%Lx is an ambiguous request identifier\n",
 363                         (unsigned long long)qtcb->bottom.support.req_handle);
 364                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 365                 break;
 366         case FSF_PROT_LINK_DOWN:
 367                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 368                 /* go through reopen to flush pending requests */
 369                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 370                 break;
 371         case FSF_PROT_REEST_QUEUE:
 372                 /* All ports should be marked as ready to run again */
 373                 zfcp_erp_set_adapter_status(adapter,
 374                                             ZFCP_STATUS_COMMON_RUNNING);
 375                 zfcp_erp_adapter_reopen(adapter,
 376                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 377                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 378                                         "fspse_8");
 379                 break;
 380         default:
 381                 dev_err(&adapter->ccw_device->dev,
 382                         "0x%x is not a valid transfer protocol status\n",
 383                         qtcb->prefix.prot_status);
 384                 zfcp_qdio_siosl(adapter);
 385                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 386         }
 387         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 388 }
 389
 390 /**
 391  * zfcp_fsf_req_complete - process completion of a FSF request
 392  * @fsf_req: The FSF request that has been completed.
 393  *
 394  * When a request has been completed either from the FCP adapter,
 395  * or it has been dismissed due to a queue shutdown, this function
 396  * is called to process the completion status and trigger further
 397  * events related to the FSF request.
 398  */
 399 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 400 {
 401         if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 402                 zfcp_fsf_status_read_handler(req);
 403                 return;
 404         }
 405
 406         del_timer(&req->timer);
 407         zfcp_fsf_protstatus_eval(req);
 408         zfcp_fsf_fsfstatus_eval(req);
 409         req->handler(req);
 410
 411         if (req->erp_action)
 412                 zfcp_erp_notify(req->erp_action, 0);
 413
 414         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 415                 zfcp_fsf_req_free(req);
 416         else
 417                 complete(&req->completion);
 418 }
 419
 420 /**
 421  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 422  * @adapter: pointer to struct zfcp_adapter
 423  *
 424  * Never ever call this without shutting down the adapter first.
 425  * Otherwise the adapter would continue using and corrupting s390 storage.
 426  * Included BUG_ON() call to ensure this is done.
 427  * ERP is supposed to be the only user of this function.
 428  */
 429 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 430 {
 431         struct zfcp_fsf_req *req, *tmp;
 432         LIST_HEAD(remove_queue);
 433
 434         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 435         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 436
 437         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 438                 list_del(&req->list);
 439                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 440                 zfcp_fsf_req_complete(req);
 441         }
 442 }
 443
 444 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 445 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 446 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 447 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 448 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 449 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 450 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 451
 452 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 453 {
 454         u32 fdmi_speed = 0;
 455         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 456                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 457         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 458                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 459         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 460                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 461         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 462                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 463         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 464                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 465         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 466                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 467         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 468                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 469         return fdmi_speed;
 470 }
 471
 472 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 473 {
 474         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 475         struct zfcp_adapter *adapter = req->adapter;
 476         struct Scsi_Host *shost = adapter->scsi_host;
 477         struct fc_els_flogi *nsp, *plogi;
 478
 479         /* adjust pointers for missing command code */
 480         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 481                                         - sizeof(u32));
 482         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 483                                         - sizeof(u32));
 484
 485         if (req->data)
 486                 memcpy(req->data, bottom, sizeof(*bottom));
 487
 488         fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn);
 489         fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn);
 490         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 491
 492         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 493         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 494                                          (u16)FSF_STATUS_READS_RECOM);
 495
 496         if (fc_host_permanent_port_name(shost) == -1)
 497                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 498
 499         zfcp_scsi_set_prot(adapter);
 500
 501         /* no error return above here, otherwise must fix call chains */
 502         /* do not evaluate invalid fields */
 503         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
 504                 return 0;
 505
 506         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 507         fc_host_speed(shost) =
 508                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
 509
 510         adapter->hydra_version = bottom->adapter_type;
 511
 512         switch (bottom->fc_topology) {
 513         case FSF_TOPO_P2P:
 514                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 515                 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
 516                 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
 517                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 518                 break;
 519         case FSF_TOPO_FABRIC:
 520                 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
 521                         fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 522                 else
 523                         fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 524                 break;
 525         case FSF_TOPO_AL:
 526                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 527                 /* fall through */
 528         default:
 529                 dev_err(&adapter->ccw_device->dev,
 530                         "Unknown or unsupported arbitrated loop "
 531                         "fibre channel topology detected\n");
 532                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 533                 return -EIO;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 540 {
 541         struct zfcp_adapter *adapter = req->adapter;
 542         struct fsf_qtcb *qtcb = req->qtcb;
 543         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 544         struct Scsi_Host *shost = adapter->scsi_host;
 545
 546         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 547                 return;
 548
 549         adapter->fsf_lic_version = bottom->lic_version;
 550         adapter->adapter_features = bottom->adapter_features;
 551         adapter->connection_features = bottom->connection_features;
 552         adapter->peer_wwpn = 0;
 553         adapter->peer_wwnn = 0;
 554         adapter->peer_d_id = 0;
 555
 556         switch (qtcb->header.fsf_status) {
 557         case FSF_GOOD:
 558                 if (zfcp_fsf_exchange_config_evaluate(req))
 559                         return;
 560
 561                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 562                         dev_err(&adapter->ccw_device->dev,
 563                                 "FCP adapter maximum QTCB size (%d bytes) "
 564                                 "is too small\n",
 565                                 bottom->max_qtcb_size);
 566                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 567                         return;
 568                 }
 569                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 570                                 &adapter->status);
 571                 break;
 572         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 573                 fc_host_node_name(shost) = 0;
 574                 fc_host_port_name(shost) = 0;
 575                 fc_host_port_id(shost) = 0;
 576                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 577                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 578                 adapter->hydra_version = 0;
 579
 580                 /* avoids adapter shutdown to be able to recognize
 581                  * events such as LINK UP */
 582                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 583                                 &adapter->status);
 584                 zfcp_fsf_link_down_info_eval(req,
 585                         &qtcb->header.fsf_status_qual.link_down_info);
 586                 if (zfcp_fsf_exchange_config_evaluate(req))
 587                         return;
 588                 break;
 589         default:
 590                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 591                 return;
 592         }
 593
 594         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 595                 adapter->hardware_version = bottom->hardware_version;
 596                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 597                        min(FC_SERIAL_NUMBER_SIZE, 17));
 598                 EBCASC(fc_host_serial_number(shost),
 599                        min(FC_SERIAL_NUMBER_SIZE, 17));
 600         }
 601
 602         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 603                 dev_err(&adapter->ccw_device->dev,
 604                         "The FCP adapter only supports newer "
 605                         "control block versions\n");
 606                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 607                 return;
 608         }
 609         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 610                 dev_err(&adapter->ccw_device->dev,
 611                         "The FCP adapter only supports older "
 612                         "control block versions\n");
 613                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 614         }
 615 }
 616
 617 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 618 {
 619         struct zfcp_adapter *adapter = req->adapter;
 620         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 621         struct Scsi_Host *shost = adapter->scsi_host;
 622
 623         if (req->data)
 624                 memcpy(req->data, bottom, sizeof(*bottom));
 625
 626         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 627                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 628         } else
 629                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 630         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 631         fc_host_supported_speeds(shost) =
 632                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
 633         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 634                FC_FC4_LIST_SIZE);
 635         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 636                FC_FC4_LIST_SIZE);
 637 }
 638
 639 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 640 {
 641         struct fsf_qtcb *qtcb = req->qtcb;
 642
 643         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 644                 return;
 645
 646         switch (qtcb->header.fsf_status) {
 647         case FSF_GOOD:
 648                 zfcp_fsf_exchange_port_evaluate(req);
 649                 break;
 650         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 651                 zfcp_fsf_exchange_port_evaluate(req);
 652                 zfcp_fsf_link_down_info_eval(req,
 653                         &qtcb->header.fsf_status_qual.link_down_info);
 654                 break;
 655         }
 656 }
 657
 658 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 659 {
 660         struct zfcp_fsf_req *req;
 661
 662         if (likely(pool))
 663                 req = mempool_alloc(pool, GFP_ATOMIC);
 664         else
 665                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 666
 667         if (unlikely(!req))
 668                 return NULL;
 669
 670         memset(req, 0, sizeof(*req));
 671         req->pool = pool;
 672         return req;
 673 }
 674
 675 static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 676 {
 677         struct fsf_qtcb *qtcb;
 678
 679         if (likely(pool))
 680                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 681         else
 682                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 683
 684         if (unlikely(!qtcb))
 685                 return NULL;
 686
 687         memset(qtcb, 0, sizeof(*qtcb));
 688         return qtcb;
 689 }
 690
 691 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 692                                                 u32 fsf_cmd, u8 sbtype,
 693                                                 mempool_t *pool)
 694 {
 695         struct zfcp_adapter *adapter = qdio->adapter;
 696         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 697
 698         if (unlikely(!req))
 699                 return ERR_PTR(-ENOMEM);
 700
 701         if (adapter->req_no == 0)
 702                 adapter->req_no++;
 703
 704         INIT_LIST_HEAD(&req->list);
 705         init_timer(&req->timer);
 706         init_completion(&req->completion);
 707
 708         req->adapter = adapter;
 709         req->fsf_command = fsf_cmd;
 710         req->req_id = adapter->req_no;
 711
 712         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 713                 if (likely(pool))
 714                         req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
 715                 else
 716                         req->qtcb = zfcp_qtcb_alloc(NULL);
 717
 718                 if (unlikely(!req->qtcb)) {
 719                         zfcp_fsf_req_free(req);
 720                         return ERR_PTR(-ENOMEM);
 721                 }
 722
 723                 req->seq_no = adapter->fsf_req_seq_no;
 724                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 725                 req->qtcb->prefix.req_id = req->req_id;
 726                 req->qtcb->prefix.ulp_info = 26;
 727                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
 728                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 729                 req->qtcb->header.req_handle = req->req_id;
 730                 req->qtcb->header.fsf_command = req->fsf_command;
 731         }
 732
 733         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 734                            req->qtcb, sizeof(struct fsf_qtcb));
 735
 736         return req;
 737 }
 738
 739 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 740 {
 741         struct zfcp_adapter *adapter = req->adapter;
 742         struct zfcp_qdio *qdio = adapter->qdio;
 743         int with_qtcb = (req->qtcb != NULL);
 744         int req_id = req->req_id;
 745
 746         zfcp_reqlist_add(adapter->req_list, req);
 747
 748         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 749         req->issued = get_tod_clock();
 750         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 751                 del_timer(&req->timer);
 752                 /* lookup request again, list might have changed */
 753                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 754                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 755                 return -EIO;
 756         }
 757
 758         /* Don't increase for unsolicited status */
 759         if (with_qtcb)
 760                 adapter->fsf_req_seq_no++;
 761         adapter->req_no++;
 762
 763         return 0;
 764 }
 765
 766 /**
 767  * zfcp_fsf_status_read - send status read request
 768  * @adapter: pointer to struct zfcp_adapter
 769  * @req_flags: request flags
 770  * Returns: 0 on success, ERROR otherwise
 771  */
 772 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 773 {
 774         struct zfcp_adapter *adapter = qdio->adapter;
 775         struct zfcp_fsf_req *req;
 776         struct fsf_status_read_buffer *sr_buf;
 777         struct page *page;
 778         int retval = -EIO;
 779
 780         spin_lock_irq(&qdio->req_q_lock);
 781         if (zfcp_qdio_sbal_get(qdio))
 782                 goto out;
 783
 784         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 785                                   SBAL_SFLAGS0_TYPE_STATUS,
 786                                   adapter->pool.status_read_req);
 787         if (IS_ERR(req)) {
 788                 retval = PTR_ERR(req);
 789                 goto out;
 790         }
 791
 792         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 793         if (!page) {
 794                 retval = -ENOMEM;
 795                 goto failed_buf;
 796         }
 797         sr_buf = page_address(page);
 798         memset(sr_buf, 0, sizeof(*sr_buf));
 799         req->data = sr_buf;
 800
 801         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 802         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 803
 804         retval = zfcp_fsf_req_send(req);
 805         if (retval)
 806                 goto failed_req_send;
 807
 808         goto out;
 809
 810 failed_req_send:
 811         req->data = NULL;
 812         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 813 failed_buf:
 814         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 815         zfcp_fsf_req_free(req);
 816 out:
 817         spin_unlock_irq(&qdio->req_q_lock);
 818         return retval;
 819 }
 820
 821 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 822 {
 823         struct scsi_device *sdev = req->data;
 824         struct zfcp_scsi_dev *zfcp_sdev;
 825         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 826
 827         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 828                 return;
 829
 830         zfcp_sdev = sdev_to_zfcp(sdev);
 831
 832         switch (req->qtcb->header.fsf_status) {
 833         case FSF_PORT_HANDLE_NOT_VALID:
 834                 if (fsq->word[0] == fsq->word[1]) {
 835                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 836                                                 "fsafch1");
 837                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 838                 }
 839                 break;
 840         case FSF_LUN_HANDLE_NOT_VALID:
 841                 if (fsq->word[0] == fsq->word[1]) {
 842                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 843                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 844                 }
 845                 break;
 846         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 847                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 848                 break;
 849         case FSF_PORT_BOXED:
 850                 zfcp_erp_set_port_status(zfcp_sdev->port,
 851                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 852                 zfcp_erp_port_reopen(zfcp_sdev->port,
 853                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 854                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 855                 break;
 856         case FSF_LUN_BOXED:
 857                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 858                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 859                                     "fsafch4");
 860                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 861                 break;
 862         case FSF_ADAPTER_STATUS_AVAILABLE:
 863                 switch (fsq->word[0]) {
 864                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 865                         zfcp_fc_test_link(zfcp_sdev->port);
 866                         /* fall through */
 867                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 868                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 869                         break;
 870                 }
 871                 break;
 872         case FSF_GOOD:
 873                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 874                 break;
 875         }
 876 }
 877
 878 /**
 879  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 880  * @scmnd: The SCSI command to abort
 881  * Returns: pointer to struct zfcp_fsf_req
 882  */
 883
 884 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 885 {
 886         struct zfcp_fsf_req *req = NULL;
 887         struct scsi_device *sdev = scmnd->device;
 888         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 889         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 890         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 891
 892         spin_lock_irq(&qdio->req_q_lock);
 893         if (zfcp_qdio_sbal_get(qdio))
 894                 goto out;
 895         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 896                                   SBAL_SFLAGS0_TYPE_READ,
 897                                   qdio->adapter->pool.scsi_abort);
 898         if (IS_ERR(req)) {
 899                 req = NULL;
 900                 goto out;
 901         }
 902
 903         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 904                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 905                 goto out_error_free;
 906
 907         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 908
 909         req->data = sdev;
 910         req->handler = zfcp_fsf_abort_fcp_command_handler;
 911         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 912         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 913         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 914
 915         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
 916         if (!zfcp_fsf_req_send(req))
 917                 goto out;
 918
 919 out_error_free:
 920         zfcp_fsf_req_free(req);
 921         req = NULL;
 922 out:
 923         spin_unlock_irq(&qdio->req_q_lock);
 924         return req;
 925 }
 926
 927 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 928 {
 929         struct zfcp_adapter *adapter = req->adapter;
 930         struct zfcp_fsf_ct_els *ct = req->data;
 931         struct fsf_qtcb_header *header = &req->qtcb->header;
 932
 933         ct->status = -EINVAL;
 934
 935         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 936                 goto skip_fsfstatus;
 937
 938         switch (header->fsf_status) {
 939         case FSF_GOOD:
 940                 ct->status = 0;
 941                 zfcp_dbf_san_res("fsscth2", req);
 942                 break;
 943         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 944                 zfcp_fsf_class_not_supp(req);
 945                 break;
 946         case FSF_ADAPTER_STATUS_AVAILABLE:
 947                 switch (header->fsf_status_qual.word[0]){
 948                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 949                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 950                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 951                         break;
 952                 }
 953                 break;
 954         case FSF_PORT_BOXED:
 955                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 956                 break;
 957         case FSF_PORT_HANDLE_NOT_VALID:
 958                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 959                 /* fall through */
 960         case FSF_GENERIC_COMMAND_REJECTED:
 961         case FSF_PAYLOAD_SIZE_MISMATCH:
 962         case FSF_REQUEST_SIZE_TOO_LARGE:
 963         case FSF_RESPONSE_SIZE_TOO_LARGE:
 964         case FSF_SBAL_MISMATCH:
 965                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 966                 break;
 967         }
 968
 969 skip_fsfstatus:
 970         if (ct->handler)
 971                 ct->handler(ct->handler_data);
 972 }
 973
 974 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
 975                                             struct zfcp_qdio_req *q_req,
 976                                             struct scatterlist *sg_req,
 977                                             struct scatterlist *sg_resp)
 978 {
 979         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
 980         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
 981         zfcp_qdio_set_sbale_last(qdio, q_req);
 982 }
 983
 984 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
 985                                        struct scatterlist *sg_req,
 986                                        struct scatterlist *sg_resp)
 987 {
 988         struct zfcp_adapter *adapter = req->adapter;
 989         struct zfcp_qdio *qdio = adapter->qdio;
 990         struct fsf_qtcb *qtcb = req->qtcb;
 991         u32 feat = adapter->adapter_features;
 992
 993         if (zfcp_adapter_multi_buffer_active(adapter)) {
 994                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
 995                         return -EIO;
 996                 qtcb->bottom.support.req_buf_length =
 997                         zfcp_qdio_real_bytes(sg_req);
 998                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
 999                         return -EIO;
1000                 qtcb->bottom.support.resp_buf_length =
1001                         zfcp_qdio_real_bytes(sg_resp);
1002
1003                 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
1004                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1005                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
1006                 return 0;
1007         }
1008
1009         /* use single, unchained SBAL if it can hold the request */
1010         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1011                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1012                                                 sg_req, sg_resp);
1013                 return 0;
1014         }
1015
1016         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1017                 return -EOPNOTSUPP;
1018
1019         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1020                 return -EIO;
1021
1022         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1023
1024         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1025         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1026
1027         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1028                 return -EIO;
1029
1030         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1031
1032         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1033
1034         return 0;
1035 }
1036
1037 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1038                                  struct scatterlist *sg_req,
1039                                  struct scatterlist *sg_resp,
1040                                  unsigned int timeout)
1041 {
1042         int ret;
1043
1044         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1045         if (ret)
1046                 return ret;
1047
1048         /* common settings for ct/gs and els requests */
1049         if (timeout > 255)
1050                 timeout = 255; /* max value accepted by hardware */
1051         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1052         req->qtcb->bottom.support.timeout = timeout;
1053         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1054
1055         return 0;
1056 }
1057
1058 /**
1059  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1060  * @ct: pointer to struct zfcp_send_ct with data for request
1061  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1062  */
1063 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1064                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1065                      unsigned int timeout)
1066 {
1067         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1068         struct zfcp_fsf_req *req;
1069         int ret = -EIO;
1070
1071         spin_lock_irq(&qdio->req_q_lock);
1072         if (zfcp_qdio_sbal_get(qdio))
1073                 goto out;
1074
1075         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1076                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1077
1078         if (IS_ERR(req)) {
1079                 ret = PTR_ERR(req);
1080                 goto out;
1081         }
1082
1083         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1084         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1085         if (ret)
1086                 goto failed_send;
1087
1088         req->handler = zfcp_fsf_send_ct_handler;
1089         req->qtcb->header.port_handle = wka_port->handle;
1090         ct->d_id = wka_port->d_id;
1091         req->data = ct;
1092
1093         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1094
1095         ret = zfcp_fsf_req_send(req);
1096         if (ret)
1097                 goto failed_send;
1098
1099         goto out;
1100
1101 failed_send:
1102         zfcp_fsf_req_free(req);
1103 out:
1104         spin_unlock_irq(&qdio->req_q_lock);
1105         return ret;
1106 }
1107
1108 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1109 {
1110         struct zfcp_fsf_ct_els *send_els = req->data;
1111         struct fsf_qtcb_header *header = &req->qtcb->header;
1112
1113         send_els->status = -EINVAL;
1114
1115         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1116                 goto skip_fsfstatus;
1117
1118         switch (header->fsf_status) {
1119         case FSF_GOOD:
1120                 send_els->status = 0;
1121                 zfcp_dbf_san_res("fsselh1", req);
1122                 break;
1123         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1124                 zfcp_fsf_class_not_supp(req);
1125                 break;
1126         case FSF_ADAPTER_STATUS_AVAILABLE:
1127                 switch (header->fsf_status_qual.word[0]){
1128                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1129                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1130                 case FSF_SQ_RETRY_IF_POSSIBLE:
1131                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1132                         break;
1133                 }
1134                 break;
1135         case FSF_ELS_COMMAND_REJECTED:
1136         case FSF_PAYLOAD_SIZE_MISMATCH:
1137         case FSF_REQUEST_SIZE_TOO_LARGE:
1138         case FSF_RESPONSE_SIZE_TOO_LARGE:
1139                 break;
1140         case FSF_SBAL_MISMATCH:
1141                 /* should never occur, avoided in zfcp_fsf_send_els */
1142                 /* fall through */
1143         default:
1144                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1145                 break;
1146         }
1147 skip_fsfstatus:
1148         if (send_els->handler)
1149                 send_els->handler(send_els->handler_data);
1150 }
1151
1152 /**
1153  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1154  * @els: pointer to struct zfcp_send_els with data for the command
1155  */
1156 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1157                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1158 {
1159         struct zfcp_fsf_req *req;
1160         struct zfcp_qdio *qdio = adapter->qdio;
1161         int ret = -EIO;
1162
1163         spin_lock_irq(&qdio->req_q_lock);
1164         if (zfcp_qdio_sbal_get(qdio))
1165                 goto out;
1166
1167         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1168                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1169
1170         if (IS_ERR(req)) {
1171                 ret = PTR_ERR(req);
1172                 goto out;
1173         }
1174
1175         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1176
1177         if (!zfcp_adapter_multi_buffer_active(adapter))
1178                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1179
1180         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1181
1182         if (ret)
1183                 goto failed_send;
1184
1185         hton24(req->qtcb->bottom.support.d_id, d_id);
1186         req->handler = zfcp_fsf_send_els_handler;
1187         els->d_id = d_id;
1188         req->data = els;
1189
1190         zfcp_dbf_san_req("fssels1", req, d_id);
1191
1192         ret = zfcp_fsf_req_send(req);
1193         if (ret)
1194                 goto failed_send;
1195
1196         goto out;
1197
1198 failed_send:
1199         zfcp_fsf_req_free(req);
1200 out:
1201         spin_unlock_irq(&qdio->req_q_lock);
1202         return ret;
1203 }
1204
1205 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1206 {
1207         struct zfcp_fsf_req *req;
1208         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1209         int retval = -EIO;
1210
1211         spin_lock_irq(&qdio->req_q_lock);
1212         if (zfcp_qdio_sbal_get(qdio))
1213                 goto out;
1214
1215         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1216                                   SBAL_SFLAGS0_TYPE_READ,
1217                                   qdio->adapter->pool.erp_req);
1218
1219         if (IS_ERR(req)) {
1220                 retval = PTR_ERR(req);
1221                 goto out;
1222         }
1223
1224         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1225         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1226
1227         req->qtcb->bottom.config.feature_selection =
1228                         FSF_FEATURE_NOTIFICATION_LOST |
1229                         FSF_FEATURE_UPDATE_ALERT;
1230         req->erp_action = erp_action;
1231         req->handler = zfcp_fsf_exchange_config_data_handler;
1232         erp_action->fsf_req_id = req->req_id;
1233
1234         zfcp_fsf_start_erp_timer(req);
1235         retval = zfcp_fsf_req_send(req);
1236         if (retval) {
1237                 zfcp_fsf_req_free(req);
1238                 erp_action->fsf_req_id = 0;
1239         }
1240 out:
1241         spin_unlock_irq(&qdio->req_q_lock);
1242         return retval;
1243 }
1244
1245 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1246                                        struct fsf_qtcb_bottom_config *data)
1247 {
1248         struct zfcp_fsf_req *req = NULL;
1249         int retval = -EIO;
1250
1251         spin_lock_irq(&qdio->req_q_lock);
1252         if (zfcp_qdio_sbal_get(qdio))
1253                 goto out_unlock;
1254
1255         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1256                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1257
1258         if (IS_ERR(req)) {
1259                 retval = PTR_ERR(req);
1260                 goto out_unlock;
1261         }
1262
1263         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1264         req->handler = zfcp_fsf_exchange_config_data_handler;
1265
1266         req->qtcb->bottom.config.feature_selection =
1267                         FSF_FEATURE_NOTIFICATION_LOST |
1268                         FSF_FEATURE_UPDATE_ALERT;
1269
1270         if (data)
1271                 req->data = data;
1272
1273         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1274         retval = zfcp_fsf_req_send(req);
1275         spin_unlock_irq(&qdio->req_q_lock);
1276         if (!retval)
1277                 wait_for_completion(&req->completion);
1278
1279         zfcp_fsf_req_free(req);
1280         return retval;
1281
1282 out_unlock:
1283         spin_unlock_irq(&qdio->req_q_lock);
1284         return retval;
1285 }
1286
1287 /**
1288  * zfcp_fsf_exchange_port_data - request information about local port
1289  * @erp_action: ERP action for the adapter for which port data is requested
1290  * Returns: 0 on success, error otherwise
1291  */
1292 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1293 {
1294         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1295         struct zfcp_fsf_req *req;
1296         int retval = -EIO;
1297
1298         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1299                 return -EOPNOTSUPP;
1300
1301         spin_lock_irq(&qdio->req_q_lock);
1302         if (zfcp_qdio_sbal_get(qdio))
1303                 goto out;
1304
1305         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1306                                   SBAL_SFLAGS0_TYPE_READ,
1307                                   qdio->adapter->pool.erp_req);
1308
1309         if (IS_ERR(req)) {
1310                 retval = PTR_ERR(req);
1311                 goto out;
1312         }
1313
1314         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1315         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1316
1317         req->handler = zfcp_fsf_exchange_port_data_handler;
1318         req->erp_action = erp_action;
1319         erp_action->fsf_req_id = req->req_id;
1320
1321         zfcp_fsf_start_erp_timer(req);
1322         retval = zfcp_fsf_req_send(req);
1323         if (retval) {
1324                 zfcp_fsf_req_free(req);
1325                 erp_action->fsf_req_id = 0;
1326         }
1327 out:
1328         spin_unlock_irq(&qdio->req_q_lock);
1329         return retval;
1330 }
1331
1332 /**
1333  * zfcp_fsf_exchange_port_data_sync - request information about local port
1334  * @qdio: pointer to struct zfcp_qdio
1335  * @data: pointer to struct fsf_qtcb_bottom_port
1336  * Returns: 0 on success, error otherwise
1337  */
1338 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1339                                      struct fsf_qtcb_bottom_port *data)
1340 {
1341         struct zfcp_fsf_req *req = NULL;
1342         int retval = -EIO;
1343
1344         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1345                 return -EOPNOTSUPP;
1346
1347         spin_lock_irq(&qdio->req_q_lock);
1348         if (zfcp_qdio_sbal_get(qdio))
1349                 goto out_unlock;
1350
1351         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1352                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1353
1354         if (IS_ERR(req)) {
1355                 retval = PTR_ERR(req);
1356                 goto out_unlock;
1357         }
1358
1359         if (data)
1360                 req->data = data;
1361
1362         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1363
1364         req->handler = zfcp_fsf_exchange_port_data_handler;
1365         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1366         retval = zfcp_fsf_req_send(req);
1367         spin_unlock_irq(&qdio->req_q_lock);
1368
1369         if (!retval)
1370                 wait_for_completion(&req->completion);
1371
1372         zfcp_fsf_req_free(req);
1373
1374         return retval;
1375
1376 out_unlock:
1377         spin_unlock_irq(&qdio->req_q_lock);
1378         return retval;
1379 }
1380
1381 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1382 {
1383         struct zfcp_port *port = req->data;
1384         struct fsf_qtcb_header *header = &req->qtcb->header;
1385         struct fc_els_flogi *plogi;
1386
1387         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1388                 goto out;
1389
1390         switch (header->fsf_status) {
1391         case FSF_PORT_ALREADY_OPEN:
1392                 break;
1393         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1394                 dev_warn(&req->adapter->ccw_device->dev,
1395                          "Not enough FCP adapter resources to open "
1396                          "remote port 0x%016Lx\n",
1397                          (unsigned long long)port->wwpn);
1398                 zfcp_erp_set_port_status(port,
1399                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1400                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1401                 break;
1402         case FSF_ADAPTER_STATUS_AVAILABLE:
1403                 switch (header->fsf_status_qual.word[0]) {
1404                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1405                         /* no zfcp_fc_test_link() with failed open port */
1406                         /* fall through */
1407                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1408                 case FSF_SQ_NO_RETRY_POSSIBLE:
1409                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1410                         break;
1411                 }
1412                 break;
1413         case FSF_GOOD:
1414                 port->handle = header->port_handle;
1415                 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1416                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1417                 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1418                                   &port->status);
1419                 /* check whether D_ID has changed during open */
1420                 /*
1421                  * FIXME: This check is not airtight, as the FCP channel does
1422                  * not monitor closures of target port connections caused on
1423                  * the remote side. Thus, they might miss out on invalidating
1424                  * locally cached WWPNs (and other N_Port parameters) of gone
1425                  * target ports. So, our heroic attempt to make things safe
1426                  * could be undermined by 'open port' response data tagged with
1427                  * obsolete WWPNs. Another reason to monitor potential
1428                  * connection closures ourself at least (by interpreting
1429                  * incoming ELS' and unsolicited status). It just crosses my
1430                  * mind that one should be able to cross-check by means of
1431                  * another GID_PN straight after a port has been opened.
1432                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1433                  */
1434                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1435                 if (req->qtcb->bottom.support.els1_length >=
1436                     FSF_PLOGI_MIN_LEN)
1437                                 zfcp_fc_plogi_evaluate(port, plogi);
1438                 break;
1439         case FSF_UNKNOWN_OP_SUBTYPE:
1440                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1441                 break;
1442         }
1443
1444 out:
1445         put_device(&port->dev);
1446 }
1447
1448 /**
1449  * zfcp_fsf_open_port - create and send open port request
1450  * @erp_action: pointer to struct zfcp_erp_action
1451  * Returns: 0 on success, error otherwise
1452  */
1453 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1454 {
1455         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1456         struct zfcp_port *port = erp_action->port;
1457         struct zfcp_fsf_req *req;
1458         int retval = -EIO;
1459
1460         spin_lock_irq(&qdio->req_q_lock);
1461         if (zfcp_qdio_sbal_get(qdio))
1462                 goto out;
1463
1464         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1465                                   SBAL_SFLAGS0_TYPE_READ,
1466                                   qdio->adapter->pool.erp_req);
1467
1468         if (IS_ERR(req)) {
1469                 retval = PTR_ERR(req);
1470                 goto out;
1471         }
1472
1473         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1474         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1475
1476         req->handler = zfcp_fsf_open_port_handler;
1477         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1478         req->data = port;
1479         req->erp_action = erp_action;
1480         erp_action->fsf_req_id = req->req_id;
1481         get_device(&port->dev);
1482
1483         zfcp_fsf_start_erp_timer(req);
1484         retval = zfcp_fsf_req_send(req);
1485         if (retval) {
1486                 zfcp_fsf_req_free(req);
1487                 erp_action->fsf_req_id = 0;
1488                 put_device(&port->dev);
1489         }
1490 out:
1491         spin_unlock_irq(&qdio->req_q_lock);
1492         return retval;
1493 }
1494
1495 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1496 {
1497         struct zfcp_port *port = req->data;
1498
1499         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1500                 return;
1501
1502         switch (req->qtcb->header.fsf_status) {
1503         case FSF_PORT_HANDLE_NOT_VALID:
1504                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1505                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1506                 break;
1507         case FSF_ADAPTER_STATUS_AVAILABLE:
1508                 break;
1509         case FSF_GOOD:
1510                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1511                 break;
1512         }
1513 }
1514
1515 /**
1516  * zfcp_fsf_close_port - create and send close port request
1517  * @erp_action: pointer to struct zfcp_erp_action
1518  * Returns: 0 on success, error otherwise
1519  */
1520 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1521 {
1522         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1523         struct zfcp_fsf_req *req;
1524         int retval = -EIO;
1525
1526         spin_lock_irq(&qdio->req_q_lock);
1527         if (zfcp_qdio_sbal_get(qdio))
1528                 goto out;
1529
1530         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1531                                   SBAL_SFLAGS0_TYPE_READ,
1532                                   qdio->adapter->pool.erp_req);
1533
1534         if (IS_ERR(req)) {
1535                 retval = PTR_ERR(req);
1536                 goto out;
1537         }
1538
1539         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1540         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1541
1542         req->handler = zfcp_fsf_close_port_handler;
1543         req->data = erp_action->port;
1544         req->erp_action = erp_action;
1545         req->qtcb->header.port_handle = erp_action->port->handle;
1546         erp_action->fsf_req_id = req->req_id;
1547
1548         zfcp_fsf_start_erp_timer(req);
1549         retval = zfcp_fsf_req_send(req);
1550         if (retval) {
1551                 zfcp_fsf_req_free(req);
1552                 erp_action->fsf_req_id = 0;
1553         }
1554 out:
1555         spin_unlock_irq(&qdio->req_q_lock);
1556         return retval;
1557 }
1558
1559 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1560 {
1561         struct zfcp_fc_wka_port *wka_port = req->data;
1562         struct fsf_qtcb_header *header = &req->qtcb->header;
1563
1564         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1565                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1566                 goto out;
1567         }
1568
1569         switch (header->fsf_status) {
1570         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1571                 dev_warn(&req->adapter->ccw_device->dev,
1572                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1573                 /* fall through */
1574         case FSF_ADAPTER_STATUS_AVAILABLE:
1575                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1576                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1577                 break;
1578         case FSF_GOOD:
1579                 wka_port->handle = header->port_handle;
1580                 /* fall through */
1581         case FSF_PORT_ALREADY_OPEN:
1582                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1583         }
1584 out:
1585         wake_up(&wka_port->completion_wq);
1586 }
1587
1588 /**
1589  * zfcp_fsf_open_wka_port - create and send open wka-port request
1590  * @wka_port: pointer to struct zfcp_fc_wka_port
1591  * Returns: 0 on success, error otherwise
1592  */
1593 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1594 {
1595         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1596         struct zfcp_fsf_req *req;
1597         unsigned long req_id = 0;
1598         int retval = -EIO;
1599
1600         spin_lock_irq(&qdio->req_q_lock);
1601         if (zfcp_qdio_sbal_get(qdio))
1602                 goto out;
1603
1604         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1605                                   SBAL_SFLAGS0_TYPE_READ,
1606                                   qdio->adapter->pool.erp_req);
1607
1608         if (IS_ERR(req)) {
1609                 retval = PTR_ERR(req);
1610                 goto out;
1611         }
1612
1613         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1614         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1615
1616         req->handler = zfcp_fsf_open_wka_port_handler;
1617         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1618         req->data = wka_port;
1619
1620         req_id = req->req_id;
1621
1622         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1623         retval = zfcp_fsf_req_send(req);
1624         if (retval)
1625                 zfcp_fsf_req_free(req);
1626 out:
1627         spin_unlock_irq(&qdio->req_q_lock);
1628         if (!retval)
1629                 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req_id);
1630         return retval;
1631 }
1632
1633 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1634 {
1635         struct zfcp_fc_wka_port *wka_port = req->data;
1636
1637         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1638                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1639                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1640         }
1641
1642         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1643         wake_up(&wka_port->completion_wq);
1644 }
1645
1646 /**
1647  * zfcp_fsf_close_wka_port - create and send close wka port request
1648  * @wka_port: WKA port to open
1649  * Returns: 0 on success, error otherwise
1650  */
1651 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1652 {
1653         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1654         struct zfcp_fsf_req *req;
1655         unsigned long req_id = 0;
1656         int retval = -EIO;
1657
1658         spin_lock_irq(&qdio->req_q_lock);
1659         if (zfcp_qdio_sbal_get(qdio))
1660                 goto out;
1661
1662         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1663                                   SBAL_SFLAGS0_TYPE_READ,
1664                                   qdio->adapter->pool.erp_req);
1665
1666         if (IS_ERR(req)) {
1667                 retval = PTR_ERR(req);
1668                 goto out;
1669         }
1670
1671         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1672         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1673
1674         req->handler = zfcp_fsf_close_wka_port_handler;
1675         req->data = wka_port;
1676         req->qtcb->header.port_handle = wka_port->handle;
1677
1678         req_id = req->req_id;
1679
1680         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1681         retval = zfcp_fsf_req_send(req);
1682         if (retval)
1683                 zfcp_fsf_req_free(req);
1684 out:
1685         spin_unlock_irq(&qdio->req_q_lock);
1686         if (!retval)
1687                 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req_id);
1688         return retval;
1689 }
1690
1691 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1692 {
1693         struct zfcp_port *port = req->data;
1694         struct fsf_qtcb_header *header = &req->qtcb->header;
1695         struct scsi_device *sdev;
1696
1697         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1698                 return;
1699
1700         switch (header->fsf_status) {
1701         case FSF_PORT_HANDLE_NOT_VALID:
1702                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1703                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1704                 break;
1705         case FSF_PORT_BOXED:
1706                 /* can't use generic zfcp_erp_modify_port_status because
1707                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1708                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1709                 shost_for_each_device(sdev, port->adapter->scsi_host)
1710                         if (sdev_to_zfcp(sdev)->port == port)
1711                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1712                                                   &sdev_to_zfcp(sdev)->status);
1713                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1714                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1715                                      "fscpph2");
1716                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1717                 break;
1718         case FSF_ADAPTER_STATUS_AVAILABLE:
1719                 switch (header->fsf_status_qual.word[0]) {
1720                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1721                         /* fall through */
1722                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1723                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1724                         break;
1725                 }
1726                 break;
1727         case FSF_GOOD:
1728                 /* can't use generic zfcp_erp_modify_port_status because
1729                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1730                  */
1731                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1732                 shost_for_each_device(sdev, port->adapter->scsi_host)
1733                         if (sdev_to_zfcp(sdev)->port == port)
1734                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1735                                                   &sdev_to_zfcp(sdev)->status);
1736                 break;
1737         }
1738 }
1739
1740 /**
1741  * zfcp_fsf_close_physical_port - close physical port
1742  * @erp_action: pointer to struct zfcp_erp_action
1743  * Returns: 0 on success
1744  */
1745 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1746 {
1747         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1748         struct zfcp_fsf_req *req;
1749         int retval = -EIO;
1750
1751         spin_lock_irq(&qdio->req_q_lock);
1752         if (zfcp_qdio_sbal_get(qdio))
1753                 goto out;
1754
1755         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1756                                   SBAL_SFLAGS0_TYPE_READ,
1757                                   qdio->adapter->pool.erp_req);
1758
1759         if (IS_ERR(req)) {
1760                 retval = PTR_ERR(req);
1761                 goto out;
1762         }
1763
1764         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1765         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1766
1767         req->data = erp_action->port;
1768         req->qtcb->header.port_handle = erp_action->port->handle;
1769         req->erp_action = erp_action;
1770         req->handler = zfcp_fsf_close_physical_port_handler;
1771         erp_action->fsf_req_id = req->req_id;
1772
1773         zfcp_fsf_start_erp_timer(req);
1774         retval = zfcp_fsf_req_send(req);
1775         if (retval) {
1776                 zfcp_fsf_req_free(req);
1777                 erp_action->fsf_req_id = 0;
1778         }
1779 out:
1780         spin_unlock_irq(&qdio->req_q_lock);
1781         return retval;
1782 }
1783
1784 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1785 {
1786         struct zfcp_adapter *adapter = req->adapter;
1787         struct scsi_device *sdev = req->data;
1788         struct zfcp_scsi_dev *zfcp_sdev;
1789         struct fsf_qtcb_header *header = &req->qtcb->header;
1790         union fsf_status_qual *qual = &header->fsf_status_qual;
1791
1792         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1793                 return;
1794
1795         zfcp_sdev = sdev_to_zfcp(sdev);
1796
1797         atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1798                           ZFCP_STATUS_COMMON_ACCESS_BOXED,
1799                           &zfcp_sdev->status);
1800
1801         switch (header->fsf_status) {
1802
1803         case FSF_PORT_HANDLE_NOT_VALID:
1804                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1805                 /* fall through */
1806         case FSF_LUN_ALREADY_OPEN:
1807                 break;
1808         case FSF_PORT_BOXED:
1809                 zfcp_erp_set_port_status(zfcp_sdev->port,
1810                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1811                 zfcp_erp_port_reopen(zfcp_sdev->port,
1812                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1813                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1814                 break;
1815         case FSF_LUN_SHARING_VIOLATION:
1816                 if (qual->word[0])
1817                         dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1818                                  "LUN 0x%Lx on port 0x%Lx is already in "
1819                                  "use by CSS%d, MIF Image ID %x\n",
1820                                  zfcp_scsi_dev_lun(sdev),
1821                                  (unsigned long long)zfcp_sdev->port->wwpn,
1822                                  qual->fsf_queue_designator.cssid,
1823                                  qual->fsf_queue_designator.hla);
1824                 zfcp_erp_set_lun_status(sdev,
1825                                         ZFCP_STATUS_COMMON_ERP_FAILED |
1826                                         ZFCP_STATUS_COMMON_ACCESS_DENIED);
1827                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1828                 break;
1829         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1830                 dev_warn(&adapter->ccw_device->dev,
1831                          "No handle is available for LUN "
1832                          "0x%016Lx on port 0x%016Lx\n",
1833                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1834                          (unsigned long long)zfcp_sdev->port->wwpn);
1835                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1836                 /* fall through */
1837         case FSF_INVALID_COMMAND_OPTION:
1838                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1839                 break;
1840         case FSF_ADAPTER_STATUS_AVAILABLE:
1841                 switch (header->fsf_status_qual.word[0]) {
1842                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1843                         zfcp_fc_test_link(zfcp_sdev->port);
1844                         /* fall through */
1845                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1846                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1847                         break;
1848                 }
1849                 break;
1850
1851         case FSF_GOOD:
1852                 zfcp_sdev->lun_handle = header->lun_handle;
1853                 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1854                 break;
1855         }
1856 }
1857
1858 /**
1859  * zfcp_fsf_open_lun - open LUN
1860  * @erp_action: pointer to struct zfcp_erp_action
1861  * Returns: 0 on success, error otherwise
1862  */
1863 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1864 {
1865         struct zfcp_adapter *adapter = erp_action->adapter;
1866         struct zfcp_qdio *qdio = adapter->qdio;
1867         struct zfcp_fsf_req *req;
1868         int retval = -EIO;
1869
1870         spin_lock_irq(&qdio->req_q_lock);
1871         if (zfcp_qdio_sbal_get(qdio))
1872                 goto out;
1873
1874         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1875                                   SBAL_SFLAGS0_TYPE_READ,
1876                                   adapter->pool.erp_req);
1877
1878         if (IS_ERR(req)) {
1879                 retval = PTR_ERR(req);
1880                 goto out;
1881         }
1882
1883         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1884         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1885
1886         req->qtcb->header.port_handle = erp_action->port->handle;
1887         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1888         req->handler = zfcp_fsf_open_lun_handler;
1889         req->data = erp_action->sdev;
1890         req->erp_action = erp_action;
1891         erp_action->fsf_req_id = req->req_id;
1892
1893         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1894                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1895
1896         zfcp_fsf_start_erp_timer(req);
1897         retval = zfcp_fsf_req_send(req);
1898         if (retval) {
1899                 zfcp_fsf_req_free(req);
1900                 erp_action->fsf_req_id = 0;
1901         }
1902 out:
1903         spin_unlock_irq(&qdio->req_q_lock);
1904         return retval;
1905 }
1906
1907 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1908 {
1909         struct scsi_device *sdev = req->data;
1910         struct zfcp_scsi_dev *zfcp_sdev;
1911
1912         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1913                 return;
1914
1915         zfcp_sdev = sdev_to_zfcp(sdev);
1916
1917         switch (req->qtcb->header.fsf_status) {
1918         case FSF_PORT_HANDLE_NOT_VALID:
1919                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1920                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1921                 break;
1922         case FSF_LUN_HANDLE_NOT_VALID:
1923                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1924                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1925                 break;
1926         case FSF_PORT_BOXED:
1927                 zfcp_erp_set_port_status(zfcp_sdev->port,
1928                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1929                 zfcp_erp_port_reopen(zfcp_sdev->port,
1930                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1931                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1932                 break;
1933         case FSF_ADAPTER_STATUS_AVAILABLE:
1934                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1935                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1936                         zfcp_fc_test_link(zfcp_sdev->port);
1937                         /* fall through */
1938                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1939                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1940                         break;
1941                 }
1942                 break;
1943         case FSF_GOOD:
1944                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1945                 break;
1946         }
1947 }
1948
1949 /**
1950  * zfcp_fsf_close_LUN - close LUN
1951  * @erp_action: pointer to erp_action triggering the "close LUN"
1952  * Returns: 0 on success, error otherwise
1953  */
1954 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
1955 {
1956         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1957         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
1958         struct zfcp_fsf_req *req;
1959         int retval = -EIO;
1960
1961         spin_lock_irq(&qdio->req_q_lock);
1962         if (zfcp_qdio_sbal_get(qdio))
1963                 goto out;
1964
1965         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
1966                                   SBAL_SFLAGS0_TYPE_READ,
1967                                   qdio->adapter->pool.erp_req);
1968
1969         if (IS_ERR(req)) {
1970                 retval = PTR_ERR(req);
1971                 goto out;
1972         }
1973
1974         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1975         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1976
1977         req->qtcb->header.port_handle = erp_action->port->handle;
1978         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1979         req->handler = zfcp_fsf_close_lun_handler;
1980         req->data = erp_action->sdev;
1981         req->erp_action = erp_action;
1982         erp_action->fsf_req_id = req->req_id;
1983
1984         zfcp_fsf_start_erp_timer(req);
1985         retval = zfcp_fsf_req_send(req);
1986         if (retval) {
1987                 zfcp_fsf_req_free(req);
1988                 erp_action->fsf_req_id = 0;
1989         }
1990 out:
1991         spin_unlock_irq(&qdio->req_q_lock);
1992         return retval;
1993 }
1994
1995 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
1996 {
1997         lat_rec->sum += lat;
1998         lat_rec->min = min(lat_rec->min, lat);
1999         lat_rec->max = max(lat_rec->max, lat);
2000 }
2001
2002 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2003 {
2004         struct fsf_qual_latency_info *lat_in;
2005         struct latency_cont *lat = NULL;
2006         struct zfcp_scsi_dev *zfcp_sdev;
2007         struct zfcp_blk_drv_data blktrc;
2008         int ticks = req->adapter->timer_ticks;
2009
2010         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2011
2012         blktrc.flags = 0;
2013         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2014         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2015                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2016         blktrc.inb_usage = 0;
2017         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2018
2019         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2020             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2021                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2022                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2023                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2024                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2025
2026                 switch (req->qtcb->bottom.io.data_direction) {
2027                 case FSF_DATADIR_DIF_READ_STRIP:
2028                 case FSF_DATADIR_DIF_READ_CONVERT:
2029                 case FSF_DATADIR_READ:
2030                         lat = &zfcp_sdev->latencies.read;
2031                         break;
2032                 case FSF_DATADIR_DIF_WRITE_INSERT:
2033                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2034                 case FSF_DATADIR_WRITE:
2035                         lat = &zfcp_sdev->latencies.write;
2036                         break;
2037                 case FSF_DATADIR_CMND:
2038                         lat = &zfcp_sdev->latencies.cmd;
2039                         break;
2040                 }
2041
2042                 if (lat) {
2043                         spin_lock(&zfcp_sdev->latencies.lock);
2044                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2045                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2046                         lat->counter++;
2047                         spin_unlock(&zfcp_sdev->latencies.lock);
2048                 }
2049         }
2050
2051         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2052                             sizeof(blktrc));
2053 }
2054
2055 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
2056 {
2057         struct scsi_cmnd *scmnd = req->data;
2058         struct scsi_device *sdev = scmnd->device;
2059         struct zfcp_scsi_dev *zfcp_sdev;
2060         struct fsf_qtcb_header *header = &req->qtcb->header;
2061
2062         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2063                 return;
2064
2065         zfcp_sdev = sdev_to_zfcp(sdev);
2066
2067         switch (header->fsf_status) {
2068         case FSF_HANDLE_MISMATCH:
2069         case FSF_PORT_HANDLE_NOT_VALID:
2070                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fssfch1");
2071                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2072                 break;
2073         case FSF_FCPLUN_NOT_VALID:
2074         case FSF_LUN_HANDLE_NOT_VALID:
2075                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2076                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2077                 break;
2078         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2079                 zfcp_fsf_class_not_supp(req);
2080                 break;
2081         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2082                 dev_err(&req->adapter->ccw_device->dev,
2083                         "Incorrect direction %d, LUN 0x%016Lx on port "
2084                         "0x%016Lx closed\n",
2085                         req->qtcb->bottom.io.data_direction,
2086                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2087                         (unsigned long long)zfcp_sdev->port->wwpn);
2088                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2089                                           "fssfch3");
2090                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2091                 break;
2092         case FSF_CMND_LENGTH_NOT_VALID:
2093                 dev_err(&req->adapter->ccw_device->dev,
2094                         "Incorrect CDB length %d, LUN 0x%016Lx on "
2095                         "port 0x%016Lx closed\n",
2096                         req->qtcb->bottom.io.fcp_cmnd_length,
2097                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2098                         (unsigned long long)zfcp_sdev->port->wwpn);
2099                 zfcp_erp_adapter_shutdown(zfcp_sdev->port->adapter, 0,
2100                                           "fssfch4");
2101                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2102                 break;
2103         case FSF_PORT_BOXED:
2104                 zfcp_erp_set_port_status(zfcp_sdev->port,
2105                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2106                 zfcp_erp_port_reopen(zfcp_sdev->port,
2107                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2108                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2109                 break;
2110         case FSF_LUN_BOXED:
2111                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2112                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2113                                     "fssfch6");
2114                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2115                 break;
2116         case FSF_ADAPTER_STATUS_AVAILABLE:
2117                 if (header->fsf_status_qual.word[0] ==
2118                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2119                         zfcp_fc_test_link(zfcp_sdev->port);
2120                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2121                 break;
2122         }
2123 }
2124
2125 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2126 {
2127         struct scsi_cmnd *scpnt;
2128         struct fcp_resp_with_ext *fcp_rsp;
2129         unsigned long flags;
2130
2131         read_lock_irqsave(&req->adapter->abort_lock, flags);
2132
2133         scpnt = req->data;
2134         if (unlikely(!scpnt)) {
2135                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2136                 return;
2137         }
2138
2139         zfcp_fsf_fcp_handler_common(req);
2140
2141         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2142                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2143                 goto skip_fsfstatus;
2144         }
2145
2146         switch (req->qtcb->header.fsf_status) {
2147         case FSF_INCONSISTENT_PROT_DATA:
2148         case FSF_INVALID_PROT_PARM:
2149                 set_host_byte(scpnt, DID_ERROR);
2150                 goto skip_fsfstatus;
2151         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2152                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2153                 goto skip_fsfstatus;
2154         case FSF_APP_TAG_CHECK_FAILURE:
2155                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2156                 goto skip_fsfstatus;
2157         case FSF_REF_TAG_CHECK_FAILURE:
2158                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2159                 goto skip_fsfstatus;
2160         }
2161         BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2162         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2163         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2164
2165 skip_fsfstatus:
2166         zfcp_fsf_req_trace(req, scpnt);
2167         zfcp_dbf_scsi_result(scpnt, req);
2168
2169         scpnt->host_scribble = NULL;
2170         (scpnt->scsi_done) (scpnt);
2171         /*
2172          * We must hold this lock until scsi_done has been called.
2173          * Otherwise we may call scsi_done after abort regarding this
2174          * command has completed.
2175          * Note: scsi_done must not block!
2176          */
2177         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2178 }
2179
2180 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2181 {
2182         switch (scsi_get_prot_op(scsi_cmnd)) {
2183         case SCSI_PROT_NORMAL:
2184                 switch (scsi_cmnd->sc_data_direction) {
2185                 case DMA_NONE:
2186                         *data_dir = FSF_DATADIR_CMND;
2187                         break;
2188                 case DMA_FROM_DEVICE:
2189                         *data_dir = FSF_DATADIR_READ;
2190                         break;
2191                 case DMA_TO_DEVICE:
2192                         *data_dir = FSF_DATADIR_WRITE;
2193                         break;
2194                 case DMA_BIDIRECTIONAL:
2195                         return -EINVAL;
2196                 }
2197                 break;
2198
2199         case SCSI_PROT_READ_STRIP:
2200                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2201                 break;
2202         case SCSI_PROT_WRITE_INSERT:
2203                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2204                 break;
2205         case SCSI_PROT_READ_PASS:
2206                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2207                 break;
2208         case SCSI_PROT_WRITE_PASS:
2209                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2210                 break;
2211         default:
2212                 return -EINVAL;
2213         }
2214
2215         return 0;
2216 }
2217
2218 /**
2219  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2220  * @scsi_cmnd: scsi command to be sent
2221  */
2222 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2223 {
2224         struct zfcp_fsf_req *req;
2225         struct fcp_cmnd *fcp_cmnd;
2226         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2227         int retval = -EIO;
2228         struct scsi_device *sdev = scsi_cmnd->device;
2229         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2230         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2231         struct zfcp_qdio *qdio = adapter->qdio;
2232         struct fsf_qtcb_bottom_io *io;
2233         unsigned long flags;
2234
2235         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2236                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2237                 return -EBUSY;
2238
2239         spin_lock_irqsave(&qdio->req_q_lock, flags);
2240         if (atomic_read(&qdio->req_q_free) <= 0) {
2241                 atomic_inc(&qdio->req_q_full);
2242                 goto out;
2243         }
2244
2245         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2246                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2247
2248         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2249                                   sbtype, adapter->pool.scsi_req);
2250
2251         if (IS_ERR(req)) {
2252                 retval = PTR_ERR(req);
2253                 goto out;
2254         }
2255
2256         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2257
2258         io = &req->qtcb->bottom.io;
2259         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2260         req->data = scsi_cmnd;
2261         req->handler = zfcp_fsf_fcp_cmnd_handler;
2262         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2263         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2264         io->service_class = FSF_CLASS_3;
2265         io->fcp_cmnd_length = FCP_CMND_LEN;
2266
2267         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2268                 io->data_block_length = scsi_cmnd->device->sector_size;
2269                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2270         }
2271
2272         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2273                 goto failed_scsi_cmnd;
2274
2275         BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2276         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2277         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd, 0);
2278
2279         if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2280             scsi_prot_sg_count(scsi_cmnd)) {
2281                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2282                                        scsi_prot_sg_count(scsi_cmnd));
2283                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2284                                                  scsi_prot_sglist(scsi_cmnd));
2285                 if (retval)
2286                         goto failed_scsi_cmnd;
2287                 io->prot_data_length = zfcp_qdio_real_bytes(
2288                                                 scsi_prot_sglist(scsi_cmnd));
2289         }
2290
2291         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2292                                          scsi_sglist(scsi_cmnd));
2293         if (unlikely(retval))
2294                 goto failed_scsi_cmnd;
2295
2296         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2297         if (zfcp_adapter_multi_buffer_active(adapter))
2298                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2299
2300         retval = zfcp_fsf_req_send(req);
2301         if (unlikely(retval))
2302                 goto failed_scsi_cmnd;
2303
2304         goto out;
2305
2306 failed_scsi_cmnd:
2307         zfcp_fsf_req_free(req);
2308         scsi_cmnd->host_scribble = NULL;
2309 out:
2310         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2311         return retval;
2312 }
2313
2314 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2315 {
2316         struct fcp_resp_with_ext *fcp_rsp;
2317         struct fcp_resp_rsp_info *rsp_info;
2318
2319         zfcp_fsf_fcp_handler_common(req);
2320
2321         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2322         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2323
2324         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2325              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2326                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2327 }
2328
2329 /**
2330  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
2331  * @scmnd: SCSI command to send the task management command for
2332  * @tm_flags: unsigned byte for task management flags
2333  * Returns: on success pointer to struct fsf_req, NULL otherwise
2334  */
2335 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
2336                                             u8 tm_flags)
2337 {
2338         struct zfcp_fsf_req *req = NULL;
2339         struct fcp_cmnd *fcp_cmnd;
2340         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scmnd->device);
2341         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2342
2343         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2344                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2345                 return NULL;
2346
2347         spin_lock_irq(&qdio->req_q_lock);
2348         if (zfcp_qdio_sbal_get(qdio))
2349                 goto out;
2350
2351         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2352                                   SBAL_SFLAGS0_TYPE_WRITE,
2353                                   qdio->adapter->pool.scsi_req);
2354
2355         if (IS_ERR(req)) {
2356                 req = NULL;
2357                 goto out;
2358         }
2359
2360         req->data = scmnd;
2361         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2362         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2363         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2364         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2365         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2366         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2367
2368         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2369
2370         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2371         zfcp_fc_scsi_to_fcp(fcp_cmnd, scmnd, tm_flags);
2372
2373         zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2374         if (!zfcp_fsf_req_send(req))
2375                 goto out;
2376
2377         zfcp_fsf_req_free(req);
2378         req = NULL;
2379 out:
2380         spin_unlock_irq(&qdio->req_q_lock);
2381         return req;
2382 }
2383
2384 /**
2385  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2386  * @adapter: pointer to struct zfcp_adapter
2387  * @sbal_idx: response queue index of SBAL to be processed
2388  */
2389 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2390 {
2391         struct zfcp_adapter *adapter = qdio->adapter;
2392         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2393         struct qdio_buffer_element *sbale;
2394         struct zfcp_fsf_req *fsf_req;
2395         unsigned long req_id;
2396         int idx;
2397
2398         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2399
2400                 sbale = &sbal->element[idx];
2401                 req_id = (unsigned long) sbale->addr;
2402                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2403
2404                 if (!fsf_req) {
2405                         /*
2406                          * Unknown request means that we have potentially memory
2407                          * corruption and must stop the machine immediately.
2408                          */
2409                         zfcp_qdio_siosl(adapter);
2410                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2411                               req_id, dev_name(&adapter->ccw_device->dev));
2412                 }
2413
2414                 zfcp_fsf_req_complete(fsf_req);
2415
2416                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2417                         break;
2418         }
2419 }