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, 2020
   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/jiffies.h>
  15 #include <linux/types.h>
  16 #include <linux/slab.h>
  17 #include <scsi/fc/fc_els.h>
  18 #include "zfcp_ext.h"
  19 #include "zfcp_fc.h"
  20 #include "zfcp_dbf.h"
  21 #include "zfcp_qdio.h"
  22 #include "zfcp_reqlist.h"
  23 #include "zfcp_diag.h"
  24
  25 /* timeout for FSF requests sent during scsi_eh: abort or FCP TMF */
  26 #define ZFCP_FSF_SCSI_ER_TIMEOUT (10*HZ)
  27 /* timeout for: exchange config/port data outside ERP, or open/close WKA port */
  28 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
  29
  30 struct kmem_cache *zfcp_fsf_qtcb_cache;
  31
  32 static bool ber_stop = true;
  33 module_param(ber_stop, bool, 0600);
  34 MODULE_PARM_DESC(ber_stop,
  35                  "Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)");
  36
  37 static void zfcp_fsf_request_timeout_handler(struct timer_list *t)
  38 {
  39         struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer);
  40         struct zfcp_adapter *adapter = fsf_req->adapter;
  41
  42         zfcp_qdio_siosl(adapter);
  43         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  44                                 "fsrth_1");
  45 }
  46
  47 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  48                                  unsigned long timeout)
  49 {
  50         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  51         fsf_req->timer.expires = jiffies + timeout;
  52         add_timer(&fsf_req->timer);
  53 }
  54
  55 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  56 {
  57         BUG_ON(!fsf_req->erp_action);
  58         fsf_req->timer.function = zfcp_erp_timeout_handler;
  59         fsf_req->timer.expires = jiffies + 30 * HZ;
  60         add_timer(&fsf_req->timer);
  61 }
  62
  63 /* association between FSF command and FSF QTCB type */
  64 static u32 fsf_qtcb_type[] = {
  65         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  66         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  67         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  68         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  69         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  70         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  71         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  72         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  73         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  74         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  75         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  76         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  77         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  78 };
  79
  80 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  81 {
  82         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  83                 "operational because of an unsupported FC class\n");
  84         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  85         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  86 }
  87
  88 /**
  89  * zfcp_fsf_req_free - free memory used by fsf request
  90  * @req: pointer to struct zfcp_fsf_req
  91  */
  92 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  93 {
  94         if (likely(req->pool)) {
  95                 if (likely(!zfcp_fsf_req_is_status_read_buffer(req)))
  96                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  97                 mempool_free(req, req->pool);
  98                 return;
  99         }
 100
 101         if (likely(!zfcp_fsf_req_is_status_read_buffer(req)))
 102                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
 103         kfree(req);
 104 }
 105
 106 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 107 {
 108         unsigned long flags;
 109         struct fsf_status_read_buffer *sr_buf = req->data;
 110         struct zfcp_adapter *adapter = req->adapter;
 111         struct zfcp_port *port;
 112         int d_id = ntoh24(sr_buf->d_id);
 113
 114         read_lock_irqsave(&adapter->port_list_lock, flags);
 115         list_for_each_entry(port, &adapter->port_list, list)
 116                 if (port->d_id == d_id) {
 117                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 118                         break;
 119                 }
 120         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 121 }
 122
 123 void zfcp_fsf_fc_host_link_down(struct zfcp_adapter *adapter)
 124 {
 125         struct Scsi_Host *shost = adapter->scsi_host;
 126
 127         adapter->hydra_version = 0;
 128         adapter->peer_wwpn = 0;
 129         adapter->peer_wwnn = 0;
 130         adapter->peer_d_id = 0;
 131
 132         /* if there is no shost yet, we have nothing to zero-out */
 133         if (shost == NULL)
 134                 return;
 135
 136         fc_host_port_id(shost) = 0;
 137         fc_host_fabric_name(shost) = 0;
 138         fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 139         fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 140         snprintf(fc_host_model(shost), FC_SYMBOLIC_NAME_SIZE, "0x%04x", 0);
 141         memset(fc_host_active_fc4s(shost), 0, FC_FC4_LIST_SIZE);
 142 }
 143
 144 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 145                                          struct fsf_link_down_info *link_down)
 146 {
 147         struct zfcp_adapter *adapter = req->adapter;
 148
 149         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 150                 return;
 151
 152         atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 153
 154         zfcp_scsi_schedule_rports_block(adapter);
 155
 156         zfcp_fsf_fc_host_link_down(adapter);
 157
 158         if (!link_down)
 159                 goto out;
 160
 161         switch (link_down->error_code) {
 162         case FSF_PSQ_LINK_NO_LIGHT:
 163                 dev_warn(&req->adapter->ccw_device->dev,
 164                          "There is no light signal from the local "
 165                          "fibre channel cable\n");
 166                 break;
 167         case FSF_PSQ_LINK_WRAP_PLUG:
 168                 dev_warn(&req->adapter->ccw_device->dev,
 169                          "There is a wrap plug instead of a fibre "
 170                          "channel cable\n");
 171                 break;
 172         case FSF_PSQ_LINK_NO_FCP:
 173                 dev_warn(&req->adapter->ccw_device->dev,
 174                          "The adjacent fibre channel node does not "
 175                          "support FCP\n");
 176                 break;
 177         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 178                 dev_warn(&req->adapter->ccw_device->dev,
 179                          "The FCP device is suspended because of a "
 180                          "firmware update\n");
 181                 break;
 182         case FSF_PSQ_LINK_INVALID_WWPN:
 183                 dev_warn(&req->adapter->ccw_device->dev,
 184                          "The FCP device detected a WWPN that is "
 185                          "duplicate or not valid\n");
 186                 break;
 187         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 188                 dev_warn(&req->adapter->ccw_device->dev,
 189                          "The fibre channel fabric does not support NPIV\n");
 190                 break;
 191         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 192                 dev_warn(&req->adapter->ccw_device->dev,
 193                          "The FCP adapter cannot support more NPIV ports\n");
 194                 break;
 195         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 196                 dev_warn(&req->adapter->ccw_device->dev,
 197                          "The adjacent switch cannot support "
 198                          "more NPIV ports\n");
 199                 break;
 200         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 201                 dev_warn(&req->adapter->ccw_device->dev,
 202                          "The FCP adapter could not log in to the "
 203                          "fibre channel fabric\n");
 204                 break;
 205         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 206                 dev_warn(&req->adapter->ccw_device->dev,
 207                          "The WWPN assignment file on the FCP adapter "
 208                          "has been damaged\n");
 209                 break;
 210         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 211                 dev_warn(&req->adapter->ccw_device->dev,
 212                          "The mode table on the FCP adapter "
 213                          "has been damaged\n");
 214                 break;
 215         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 216                 dev_warn(&req->adapter->ccw_device->dev,
 217                          "All NPIV ports on the FCP adapter have "
 218                          "been assigned\n");
 219                 break;
 220         default:
 221                 dev_warn(&req->adapter->ccw_device->dev,
 222                          "The link between the FCP adapter and "
 223                          "the FC fabric is down\n");
 224         }
 225 out:
 226         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 227 }
 228
 229 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 230 {
 231         struct fsf_status_read_buffer *sr_buf = req->data;
 232         struct fsf_link_down_info *ldi =
 233                 (struct fsf_link_down_info *) &sr_buf->payload;
 234
 235         switch (sr_buf->status_subtype) {
 236         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 237         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 238                 zfcp_fsf_link_down_info_eval(req, ldi);
 239                 break;
 240         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 241                 zfcp_fsf_link_down_info_eval(req, NULL);
 242         }
 243 }
 244
 245 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 246 {
 247         struct zfcp_adapter *adapter = req->adapter;
 248         struct fsf_status_read_buffer *sr_buf = req->data;
 249
 250         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 251                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 252                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 253                 zfcp_fsf_req_free(req);
 254                 return;
 255         }
 256
 257         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 258
 259         switch (sr_buf->status_type) {
 260         case FSF_STATUS_READ_PORT_CLOSED:
 261                 zfcp_fsf_status_read_port_closed(req);
 262                 break;
 263         case FSF_STATUS_READ_INCOMING_ELS:
 264                 zfcp_fc_incoming_els(req);
 265                 break;
 266         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 267                 break;
 268         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 269                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 270                 if (ber_stop) {
 271                         dev_warn(&adapter->ccw_device->dev,
 272                                  "All paths over this FCP device are disused because of excessive bit errors\n");
 273                         zfcp_erp_adapter_shutdown(adapter, 0, "fssrh_b");
 274                 } else {
 275                         dev_warn(&adapter->ccw_device->dev,
 276                                  "The error threshold for checksum statistics has been exceeded\n");
 277                 }
 278                 break;
 279         case FSF_STATUS_READ_LINK_DOWN:
 280                 zfcp_fsf_status_read_link_down(req);
 281                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 282                 break;
 283         case FSF_STATUS_READ_LINK_UP:
 284                 dev_info(&adapter->ccw_device->dev,
 285                          "The local link has been restored\n");
 286                 /* All ports should be marked as ready to run again */
 287                 zfcp_erp_set_adapter_status(adapter,
 288                                             ZFCP_STATUS_COMMON_RUNNING);
 289                 zfcp_erp_adapter_reopen(adapter,
 290                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 291                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 292                                         "fssrh_2");
 293                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 294
 295                 break;
 296         case FSF_STATUS_READ_NOTIFICATION_LOST:
 297                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 298                         zfcp_fc_conditional_port_scan(adapter);
 299                 break;
 300         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 301                 adapter->adapter_features = sr_buf->payload.word[0];
 302                 break;
 303         }
 304
 305         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 306         zfcp_fsf_req_free(req);
 307
 308         atomic_inc(&adapter->stat_miss);
 309         queue_work(adapter->work_queue, &adapter->stat_work);
 310 }
 311
 312 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 313 {
 314         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 315         case FSF_SQ_FCP_RSP_AVAILABLE:
 316         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 317         case FSF_SQ_NO_RETRY_POSSIBLE:
 318         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 319                 return;
 320         case FSF_SQ_COMMAND_ABORTED:
 321                 break;
 322         case FSF_SQ_NO_RECOM:
 323                 dev_err(&req->adapter->ccw_device->dev,
 324                         "The FCP adapter reported a problem "
 325                         "that cannot be recovered\n");
 326                 zfcp_qdio_siosl(req->adapter);
 327                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 328                 break;
 329         }
 330         /* all non-return stats set FSFREQ_ERROR*/
 331         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 332 }
 333
 334 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 335 {
 336         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 337                 return;
 338
 339         switch (req->qtcb->header.fsf_status) {
 340         case FSF_UNKNOWN_COMMAND:
 341                 dev_err(&req->adapter->ccw_device->dev,
 342                         "The FCP adapter does not recognize the command 0x%x\n",
 343                         req->qtcb->header.fsf_command);
 344                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 345                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 346                 break;
 347         case FSF_ADAPTER_STATUS_AVAILABLE:
 348                 zfcp_fsf_fsfstatus_qual_eval(req);
 349                 break;
 350         }
 351 }
 352
 353 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 354 {
 355         struct zfcp_adapter *adapter = req->adapter;
 356         struct fsf_qtcb *qtcb = req->qtcb;
 357         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 358
 359         zfcp_dbf_hba_fsf_response(req);
 360
 361         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 362                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 363                 return;
 364         }
 365
 366         switch (qtcb->prefix.prot_status) {
 367         case FSF_PROT_GOOD:
 368         case FSF_PROT_FSF_STATUS_PRESENTED:
 369                 return;
 370         case FSF_PROT_QTCB_VERSION_ERROR:
 371                 dev_err(&adapter->ccw_device->dev,
 372                         "QTCB version 0x%x not supported by FCP adapter "
 373                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 374                         psq->word[0], psq->word[1]);
 375                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 376                 break;
 377         case FSF_PROT_ERROR_STATE:
 378         case FSF_PROT_SEQ_NUMB_ERROR:
 379                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 380                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 381                 break;
 382         case FSF_PROT_UNSUPP_QTCB_TYPE:
 383                 dev_err(&adapter->ccw_device->dev,
 384                         "The QTCB type is not supported by the FCP adapter\n");
 385                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 386                 break;
 387         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 388                 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 389                                 &adapter->status);
 390                 break;
 391         case FSF_PROT_DUPLICATE_REQUEST_ID:
 392                 dev_err(&adapter->ccw_device->dev,
 393                         "0x%Lx is an ambiguous request identifier\n",
 394                         (unsigned long long)qtcb->bottom.support.req_handle);
 395                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 396                 break;
 397         case FSF_PROT_LINK_DOWN:
 398                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 399                 /* go through reopen to flush pending requests */
 400                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 401                 break;
 402         case FSF_PROT_REEST_QUEUE:
 403                 /* All ports should be marked as ready to run again */
 404                 zfcp_erp_set_adapter_status(adapter,
 405                                             ZFCP_STATUS_COMMON_RUNNING);
 406                 zfcp_erp_adapter_reopen(adapter,
 407                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 408                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 409                                         "fspse_8");
 410                 break;
 411         default:
 412                 dev_err(&adapter->ccw_device->dev,
 413                         "0x%x is not a valid transfer protocol status\n",
 414                         qtcb->prefix.prot_status);
 415                 zfcp_qdio_siosl(adapter);
 416                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 417         }
 418         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 419 }
 420
 421 /**
 422  * zfcp_fsf_req_complete - process completion of a FSF request
 423  * @req: The FSF request that has been completed.
 424  *
 425  * When a request has been completed either from the FCP adapter,
 426  * or it has been dismissed due to a queue shutdown, this function
 427  * is called to process the completion status and trigger further
 428  * events related to the FSF request.
 429  * Caller must ensure that the request has been removed from
 430  * adapter->req_list, to protect against concurrent modification
 431  * by zfcp_erp_strategy_check_fsfreq().
 432  */
 433 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 434 {
 435         struct zfcp_erp_action *erp_action;
 436
 437         if (unlikely(zfcp_fsf_req_is_status_read_buffer(req))) {
 438                 zfcp_fsf_status_read_handler(req);
 439                 return;
 440         }
 441
 442         del_timer_sync(&req->timer);
 443         zfcp_fsf_protstatus_eval(req);
 444         zfcp_fsf_fsfstatus_eval(req);
 445         req->handler(req);
 446
 447         erp_action = req->erp_action;
 448         if (erp_action)
 449                 zfcp_erp_notify(erp_action, 0);
 450
 451         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 452                 zfcp_fsf_req_free(req);
 453         else
 454                 complete(&req->completion);
 455 }
 456
 457 /**
 458  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 459  * @adapter: pointer to struct zfcp_adapter
 460  *
 461  * Never ever call this without shutting down the adapter first.
 462  * Otherwise the adapter would continue using and corrupting s390 storage.
 463  * Included BUG_ON() call to ensure this is done.
 464  * ERP is supposed to be the only user of this function.
 465  */
 466 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 467 {
 468         struct zfcp_fsf_req *req, *tmp;
 469         LIST_HEAD(remove_queue);
 470
 471         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 472         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 473
 474         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 475                 list_del(&req->list);
 476                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 477                 zfcp_fsf_req_complete(req);
 478         }
 479 }
 480
 481 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 482 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 483 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 484 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 485 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 486 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 487 #define ZFCP_FSF_PORTSPEED_32GBIT       (1 <<  6)
 488 #define ZFCP_FSF_PORTSPEED_64GBIT       (1 <<  7)
 489 #define ZFCP_FSF_PORTSPEED_128GBIT      (1 <<  8)
 490 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 491
 492 u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 493 {
 494         u32 fdmi_speed = 0;
 495         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 496                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 497         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 498                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 499         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 500                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 501         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 502                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 503         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 504                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 505         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 506                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 507         if (fsf_speed & ZFCP_FSF_PORTSPEED_32GBIT)
 508                 fdmi_speed |= FC_PORTSPEED_32GBIT;
 509         if (fsf_speed & ZFCP_FSF_PORTSPEED_64GBIT)
 510                 fdmi_speed |= FC_PORTSPEED_64GBIT;
 511         if (fsf_speed & ZFCP_FSF_PORTSPEED_128GBIT)
 512                 fdmi_speed |= FC_PORTSPEED_128GBIT;
 513         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 514                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 515         return fdmi_speed;
 516 }
 517
 518 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 519 {
 520         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 521         struct zfcp_adapter *adapter = req->adapter;
 522         struct fc_els_flogi *plogi;
 523
 524         /* adjust pointers for missing command code */
 525         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 526                                         - sizeof(u32));
 527
 528         if (req->data)
 529                 memcpy(req->data, bottom, sizeof(*bottom));
 530
 531         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 532         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 533                                          (u16)FSF_STATUS_READS_RECOM);
 534
 535         /* no error return above here, otherwise must fix call chains */
 536         /* do not evaluate invalid fields */
 537         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
 538                 return 0;
 539
 540         adapter->hydra_version = bottom->adapter_type;
 541
 542         switch (bottom->fc_topology) {
 543         case FSF_TOPO_P2P:
 544                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 545                 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
 546                 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
 547                 break;
 548         case FSF_TOPO_FABRIC:
 549                 break;
 550         case FSF_TOPO_AL:
 551         default:
 552                 dev_err(&adapter->ccw_device->dev,
 553                         "Unknown or unsupported arbitrated loop "
 554                         "fibre channel topology detected\n");
 555                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 556                 return -EIO;
 557         }
 558
 559         return 0;
 560 }
 561
 562 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 563 {
 564         struct zfcp_adapter *adapter = req->adapter;
 565         struct zfcp_diag_header *const diag_hdr =
 566                 &adapter->diagnostics->config_data.header;
 567         struct fsf_qtcb *qtcb = req->qtcb;
 568         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 569
 570         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 571                 return;
 572
 573         adapter->fsf_lic_version = bottom->lic_version;
 574         adapter->adapter_features = bottom->adapter_features;
 575         adapter->connection_features = bottom->connection_features;
 576         adapter->peer_wwpn = 0;
 577         adapter->peer_wwnn = 0;
 578         adapter->peer_d_id = 0;
 579
 580         switch (qtcb->header.fsf_status) {
 581         case FSF_GOOD:
 582                 /*
 583                  * usually we wait with an update till the cache is too old,
 584                  * but because we have the data available, update it anyway
 585                  */
 586                 zfcp_diag_update_xdata(diag_hdr, bottom, false);
 587
 588                 zfcp_scsi_shost_update_config_data(adapter, bottom, false);
 589                 if (zfcp_fsf_exchange_config_evaluate(req))
 590                         return;
 591
 592                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 593                         dev_err(&adapter->ccw_device->dev,
 594                                 "FCP adapter maximum QTCB size (%d bytes) "
 595                                 "is too small\n",
 596                                 bottom->max_qtcb_size);
 597                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 598                         return;
 599                 }
 600                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 601                                 &adapter->status);
 602                 break;
 603         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 604                 zfcp_diag_update_xdata(diag_hdr, bottom, true);
 605                 req->status |= ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE;
 606
 607                 /* avoids adapter shutdown to be able to recognize
 608                  * events such as LINK UP */
 609                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 610                                 &adapter->status);
 611                 zfcp_fsf_link_down_info_eval(req,
 612                         &qtcb->header.fsf_status_qual.link_down_info);
 613
 614                 zfcp_scsi_shost_update_config_data(adapter, bottom, true);
 615                 if (zfcp_fsf_exchange_config_evaluate(req))
 616                         return;
 617                 break;
 618         default:
 619                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 620                 return;
 621         }
 622
 623         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)
 624                 adapter->hardware_version = bottom->hardware_version;
 625
 626         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 627                 dev_err(&adapter->ccw_device->dev,
 628                         "The FCP adapter only supports newer "
 629                         "control block versions\n");
 630                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 631                 return;
 632         }
 633         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 634                 dev_err(&adapter->ccw_device->dev,
 635                         "The FCP adapter only supports older "
 636                         "control block versions\n");
 637                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 638         }
 639 }
 640
 641 /*
 642  * Mapping of FC Endpoint Security flag masks to mnemonics
 643  *
 644  * NOTE: Update macro ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH when making any
 645  *       changes.
 646  */
 647 static const struct {
 648         u32     mask;
 649         char    *name;
 650 } zfcp_fsf_fc_security_mnemonics[] = {
 651         { FSF_FC_SECURITY_AUTH,         "Authentication" },
 652         { FSF_FC_SECURITY_ENC_FCSP2 |
 653           FSF_FC_SECURITY_ENC_ERAS,     "Encryption" },
 654 };
 655
 656 /* maximum strlen(zfcp_fsf_fc_security_mnemonics[...].name) + 1 */
 657 #define ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH 15
 658
 659 /**
 660  * zfcp_fsf_scnprint_fc_security() - translate FC Endpoint Security flags into
 661  *                                   mnemonics and place in a buffer
 662  * @buf        : the buffer to place the translated FC Endpoint Security flag(s)
 663  *               into
 664  * @size       : the size of the buffer, including the trailing null space
 665  * @fc_security: one or more FC Endpoint Security flags, or zero
 666  * @fmt        : specifies whether a list or a single item is to be put into the
 667  *               buffer
 668  *
 669  * The Fibre Channel (FC) Endpoint Security flags are translated into mnemonics.
 670  * If the FC Endpoint Security flags are zero "none" is placed into the buffer.
 671  *
 672  * With ZFCP_FSF_PRINT_FMT_LIST the mnemonics are placed as a list separated by
 673  * a comma followed by a space into the buffer. If one or more FC Endpoint
 674  * Security flags cannot be translated into a mnemonic, as they are undefined
 675  * in zfcp_fsf_fc_security_mnemonics, their bitwise ORed value in hexadecimal
 676  * representation is placed into the buffer.
 677  *
 678  * With ZFCP_FSF_PRINT_FMT_SINGLEITEM only one single mnemonic is placed into
 679  * the buffer. If the FC Endpoint Security flag cannot be translated, as it is
 680  * undefined in zfcp_fsf_fc_security_mnemonics, its value in hexadecimal
 681  * representation is placed into the buffer. If more than one FC Endpoint
 682  * Security flag was specified, their value in hexadecimal representation is
 683  * placed into the buffer. The macro ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH
 684  * can be used to define a buffer that is large enough to hold one mnemonic.
 685  *
 686  * Return: The number of characters written into buf not including the trailing
 687  *         '\0'. If size is == 0 the function returns 0.
 688  */
 689 ssize_t zfcp_fsf_scnprint_fc_security(char *buf, size_t size, u32 fc_security,
 690                                       enum zfcp_fsf_print_fmt fmt)
 691 {
 692         const char *prefix = "";
 693         ssize_t len = 0;
 694         int i;
 695
 696         if (fc_security == 0)
 697                 return scnprintf(buf, size, "none");
 698         if (fmt == ZFCP_FSF_PRINT_FMT_SINGLEITEM && hweight32(fc_security) != 1)
 699                 return scnprintf(buf, size, "0x%08x", fc_security);
 700
 701         for (i = 0; i < ARRAY_SIZE(zfcp_fsf_fc_security_mnemonics); i++) {
 702                 if (!(fc_security & zfcp_fsf_fc_security_mnemonics[i].mask))
 703                         continue;
 704
 705                 len += scnprintf(buf + len, size - len, "%s%s", prefix,
 706                                  zfcp_fsf_fc_security_mnemonics[i].name);
 707                 prefix = ", ";
 708                 fc_security &= ~zfcp_fsf_fc_security_mnemonics[i].mask;
 709         }
 710
 711         if (fc_security != 0)
 712                 len += scnprintf(buf + len, size - len, "%s0x%08x",
 713                                  prefix, fc_security);
 714
 715         return len;
 716 }
 717
 718 static void zfcp_fsf_dbf_adapter_fc_security(struct zfcp_adapter *adapter,
 719                                              struct zfcp_fsf_req *req)
 720 {
 721         if (adapter->fc_security_algorithms ==
 722             adapter->fc_security_algorithms_old) {
 723                 /* no change, no trace */
 724                 return;
 725         }
 726
 727         zfcp_dbf_hba_fsf_fces("fsfcesa", req, ZFCP_DBF_INVALID_WWPN,
 728                               adapter->fc_security_algorithms_old,
 729                               adapter->fc_security_algorithms);
 730
 731         adapter->fc_security_algorithms_old = adapter->fc_security_algorithms;
 732 }
 733
 734 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 735 {
 736         struct zfcp_adapter *adapter = req->adapter;
 737         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 738
 739         if (req->data)
 740                 memcpy(req->data, bottom, sizeof(*bottom));
 741
 742         if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY)
 743                 adapter->fc_security_algorithms =
 744                         bottom->fc_security_algorithms;
 745         else
 746                 adapter->fc_security_algorithms = 0;
 747         zfcp_fsf_dbf_adapter_fc_security(adapter, req);
 748 }
 749
 750 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 751 {
 752         struct zfcp_diag_header *const diag_hdr =
 753                 &req->adapter->diagnostics->port_data.header;
 754         struct fsf_qtcb *qtcb = req->qtcb;
 755         struct fsf_qtcb_bottom_port *bottom = &qtcb->bottom.port;
 756
 757         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 758                 return;
 759
 760         switch (qtcb->header.fsf_status) {
 761         case FSF_GOOD:
 762                 /*
 763                  * usually we wait with an update till the cache is too old,
 764                  * but because we have the data available, update it anyway
 765                  */
 766                 zfcp_diag_update_xdata(diag_hdr, bottom, false);
 767
 768                 zfcp_scsi_shost_update_port_data(req->adapter, bottom);
 769                 zfcp_fsf_exchange_port_evaluate(req);
 770                 break;
 771         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 772                 zfcp_diag_update_xdata(diag_hdr, bottom, true);
 773                 req->status |= ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE;
 774
 775                 zfcp_fsf_link_down_info_eval(req,
 776                         &qtcb->header.fsf_status_qual.link_down_info);
 777
 778                 zfcp_scsi_shost_update_port_data(req->adapter, bottom);
 779                 zfcp_fsf_exchange_port_evaluate(req);
 780                 break;
 781         }
 782 }
 783
 784 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 785 {
 786         struct zfcp_fsf_req *req;
 787
 788         if (likely(pool))
 789                 req = mempool_alloc(pool, GFP_ATOMIC);
 790         else
 791                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 792
 793         if (unlikely(!req))
 794                 return NULL;
 795
 796         memset(req, 0, sizeof(*req));
 797         req->pool = pool;
 798         return req;
 799 }
 800
 801 static struct fsf_qtcb *zfcp_fsf_qtcb_alloc(mempool_t *pool)
 802 {
 803         struct fsf_qtcb *qtcb;
 804
 805         if (likely(pool))
 806                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 807         else
 808                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 809
 810         if (unlikely(!qtcb))
 811                 return NULL;
 812
 813         memset(qtcb, 0, sizeof(*qtcb));
 814         return qtcb;
 815 }
 816
 817 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 818                                                 u32 fsf_cmd, u8 sbtype,
 819                                                 mempool_t *pool)
 820 {
 821         struct zfcp_adapter *adapter = qdio->adapter;
 822         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 823
 824         if (unlikely(!req))
 825                 return ERR_PTR(-ENOMEM);
 826
 827         if (adapter->req_no == 0)
 828                 adapter->req_no++;
 829
 830         INIT_LIST_HEAD(&req->list);
 831         timer_setup(&req->timer, NULL, 0);
 832         init_completion(&req->completion);
 833
 834         req->adapter = adapter;
 835         req->req_id = adapter->req_no;
 836
 837         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 838                 if (likely(pool))
 839                         req->qtcb = zfcp_fsf_qtcb_alloc(
 840                                 adapter->pool.qtcb_pool);
 841                 else
 842                         req->qtcb = zfcp_fsf_qtcb_alloc(NULL);
 843
 844                 if (unlikely(!req->qtcb)) {
 845                         zfcp_fsf_req_free(req);
 846                         return ERR_PTR(-ENOMEM);
 847                 }
 848
 849                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 850                 req->qtcb->prefix.req_id = req->req_id;
 851                 req->qtcb->prefix.ulp_info = 26;
 852                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
 853                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 854                 req->qtcb->header.req_handle = req->req_id;
 855                 req->qtcb->header.fsf_command = fsf_cmd;
 856         }
 857
 858         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 859                            req->qtcb, sizeof(struct fsf_qtcb));
 860
 861         return req;
 862 }
 863
 864 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 865 {
 866         const bool is_srb = zfcp_fsf_req_is_status_read_buffer(req);
 867         struct zfcp_adapter *adapter = req->adapter;
 868         struct zfcp_qdio *qdio = adapter->qdio;
 869         int req_id = req->req_id;
 870
 871         zfcp_reqlist_add(adapter->req_list, req);
 872
 873         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 874         req->issued = get_tod_clock();
 875         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 876                 del_timer_sync(&req->timer);
 877                 /* lookup request again, list might have changed */
 878                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 879                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 880                 return -EIO;
 881         }
 882
 883         /*
 884          * NOTE: DO NOT TOUCH ASYNC req PAST THIS POINT.
 885          *       ONLY TOUCH SYNC req AGAIN ON req->completion.
 886          *
 887          * The request might complete and be freed concurrently at any point
 888          * now. This is not protected by the QDIO-lock (req_q_lock). So any
 889          * uncontrolled access after this might result in an use-after-free bug.
 890          * Only if the request doesn't have ZFCP_STATUS_FSFREQ_CLEANUP set, and
 891          * when it is completed via req->completion, is it safe to use req
 892          * again.
 893          */
 894
 895         /* Don't increase for unsolicited status */
 896         if (!is_srb)
 897                 adapter->fsf_req_seq_no++;
 898         adapter->req_no++;
 899
 900         return 0;
 901 }
 902
 903 /**
 904  * zfcp_fsf_status_read - send status read request
 905  * @qdio: pointer to struct zfcp_qdio
 906  * Returns: 0 on success, ERROR otherwise
 907  */
 908 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 909 {
 910         struct zfcp_adapter *adapter = qdio->adapter;
 911         struct zfcp_fsf_req *req;
 912         struct fsf_status_read_buffer *sr_buf;
 913         struct page *page;
 914         int retval = -EIO;
 915
 916         spin_lock_irq(&qdio->req_q_lock);
 917         if (zfcp_qdio_sbal_get(qdio))
 918                 goto out;
 919
 920         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 921                                   SBAL_SFLAGS0_TYPE_STATUS,
 922                                   adapter->pool.status_read_req);
 923         if (IS_ERR(req)) {
 924                 retval = PTR_ERR(req);
 925                 goto out;
 926         }
 927
 928         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 929         if (!page) {
 930                 retval = -ENOMEM;
 931                 goto failed_buf;
 932         }
 933         sr_buf = page_address(page);
 934         memset(sr_buf, 0, sizeof(*sr_buf));
 935         req->data = sr_buf;
 936
 937         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 938         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 939
 940         retval = zfcp_fsf_req_send(req);
 941         if (retval)
 942                 goto failed_req_send;
 943         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
 944
 945         goto out;
 946
 947 failed_req_send:
 948         req->data = NULL;
 949         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 950 failed_buf:
 951         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 952         zfcp_fsf_req_free(req);
 953 out:
 954         spin_unlock_irq(&qdio->req_q_lock);
 955         return retval;
 956 }
 957
 958 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 959 {
 960         struct scsi_device *sdev = req->data;
 961         struct zfcp_scsi_dev *zfcp_sdev;
 962         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 963
 964         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 965                 return;
 966
 967         zfcp_sdev = sdev_to_zfcp(sdev);
 968
 969         switch (req->qtcb->header.fsf_status) {
 970         case FSF_PORT_HANDLE_NOT_VALID:
 971                 if (fsq->word[0] == fsq->word[1]) {
 972                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 973                                                 "fsafch1");
 974                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 975                 }
 976                 break;
 977         case FSF_LUN_HANDLE_NOT_VALID:
 978                 if (fsq->word[0] == fsq->word[1]) {
 979                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 980                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 981                 }
 982                 break;
 983         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 984                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 985                 break;
 986         case FSF_PORT_BOXED:
 987                 zfcp_erp_set_port_status(zfcp_sdev->port,
 988                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 989                 zfcp_erp_port_reopen(zfcp_sdev->port,
 990                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 991                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 992                 break;
 993         case FSF_LUN_BOXED:
 994                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 995                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 996                                     "fsafch4");
 997                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 998                 break;
 999         case FSF_ADAPTER_STATUS_AVAILABLE:
1000                 switch (fsq->word[0]) {
1001                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1002                         zfcp_fc_test_link(zfcp_sdev->port);
1003                         fallthrough;
1004                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1005                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1006                         break;
1007                 }
1008                 break;
1009         case FSF_GOOD:
1010                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1011                 break;
1012         }
1013 }
1014
1015 /**
1016  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
1017  * @scmnd: The SCSI command to abort
1018  * Returns: pointer to struct zfcp_fsf_req
1019  */
1020
1021 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
1022 {
1023         struct zfcp_fsf_req *req = NULL;
1024         struct scsi_device *sdev = scmnd->device;
1025         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
1026         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
1027         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
1028
1029         spin_lock_irq(&qdio->req_q_lock);
1030         if (zfcp_qdio_sbal_get(qdio))
1031                 goto out;
1032         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
1033                                   SBAL_SFLAGS0_TYPE_READ,
1034                                   qdio->adapter->pool.scsi_abort);
1035         if (IS_ERR(req)) {
1036                 req = NULL;
1037                 goto out;
1038         }
1039
1040         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
1041                        ZFCP_STATUS_COMMON_UNBLOCKED)))
1042                 goto out_error_free;
1043
1044         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1045
1046         req->data = sdev;
1047         req->handler = zfcp_fsf_abort_fcp_command_handler;
1048         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
1049         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
1050         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1051
1052         zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
1053         if (!zfcp_fsf_req_send(req)) {
1054                 /* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
1055                 goto out;
1056         }
1057
1058 out_error_free:
1059         zfcp_fsf_req_free(req);
1060         req = NULL;
1061 out:
1062         spin_unlock_irq(&qdio->req_q_lock);
1063         return req;
1064 }
1065
1066 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1067 {
1068         struct zfcp_adapter *adapter = req->adapter;
1069         struct zfcp_fsf_ct_els *ct = req->data;
1070         struct fsf_qtcb_header *header = &req->qtcb->header;
1071
1072         ct->status = -EINVAL;
1073
1074         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1075                 goto skip_fsfstatus;
1076
1077         switch (header->fsf_status) {
1078         case FSF_GOOD:
1079                 ct->status = 0;
1080                 zfcp_dbf_san_res("fsscth2", req);
1081                 break;
1082         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1083                 zfcp_fsf_class_not_supp(req);
1084                 break;
1085         case FSF_ADAPTER_STATUS_AVAILABLE:
1086                 switch (header->fsf_status_qual.word[0]){
1087                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1088                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1089                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1090                         break;
1091                 }
1092                 break;
1093         case FSF_PORT_BOXED:
1094                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1095                 break;
1096         case FSF_PORT_HANDLE_NOT_VALID:
1097                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
1098                 fallthrough;
1099         case FSF_GENERIC_COMMAND_REJECTED:
1100         case FSF_PAYLOAD_SIZE_MISMATCH:
1101         case FSF_REQUEST_SIZE_TOO_LARGE:
1102         case FSF_RESPONSE_SIZE_TOO_LARGE:
1103         case FSF_SBAL_MISMATCH:
1104                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1105                 break;
1106         }
1107
1108 skip_fsfstatus:
1109         if (ct->handler)
1110                 ct->handler(ct->handler_data);
1111 }
1112
1113 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
1114                                             struct zfcp_qdio_req *q_req,
1115                                             struct scatterlist *sg_req,
1116                                             struct scatterlist *sg_resp)
1117 {
1118         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
1119         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
1120         zfcp_qdio_set_sbale_last(qdio, q_req);
1121 }
1122
1123 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1124                                        struct scatterlist *sg_req,
1125                                        struct scatterlist *sg_resp)
1126 {
1127         struct zfcp_adapter *adapter = req->adapter;
1128         struct zfcp_qdio *qdio = adapter->qdio;
1129         struct fsf_qtcb *qtcb = req->qtcb;
1130         u32 feat = adapter->adapter_features;
1131
1132         if (zfcp_adapter_multi_buffer_active(adapter)) {
1133                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1134                         return -EIO;
1135                 qtcb->bottom.support.req_buf_length =
1136                         zfcp_qdio_real_bytes(sg_req);
1137                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1138                         return -EIO;
1139                 qtcb->bottom.support.resp_buf_length =
1140                         zfcp_qdio_real_bytes(sg_resp);
1141
1142                 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
1143                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1144                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
1145                 return 0;
1146         }
1147
1148         /* use single, unchained SBAL if it can hold the request */
1149         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1150                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1151                                                 sg_req, sg_resp);
1152                 return 0;
1153         }
1154
1155         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1156                 return -EOPNOTSUPP;
1157
1158         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1159                 return -EIO;
1160
1161         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1162
1163         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1164         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1165
1166         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1167                 return -EIO;
1168
1169         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1170
1171         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1172
1173         return 0;
1174 }
1175
1176 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1177                                  struct scatterlist *sg_req,
1178                                  struct scatterlist *sg_resp,
1179                                  unsigned int timeout)
1180 {
1181         int ret;
1182
1183         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1184         if (ret)
1185                 return ret;
1186
1187         /* common settings for ct/gs and els requests */
1188         if (timeout > 255)
1189                 timeout = 255; /* max value accepted by hardware */
1190         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1191         req->qtcb->bottom.support.timeout = timeout;
1192         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1193
1194         return 0;
1195 }
1196
1197 /**
1198  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1199  * @wka_port: pointer to zfcp WKA port to send CT/GS to
1200  * @ct: pointer to struct zfcp_send_ct with data for request
1201  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1202  * @timeout: timeout that hardware should use, and a later software timeout
1203  */
1204 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1205                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1206                      unsigned int timeout)
1207 {
1208         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1209         struct zfcp_fsf_req *req;
1210         int ret = -EIO;
1211
1212         spin_lock_irq(&qdio->req_q_lock);
1213         if (zfcp_qdio_sbal_get(qdio))
1214                 goto out;
1215
1216         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1217                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1218
1219         if (IS_ERR(req)) {
1220                 ret = PTR_ERR(req);
1221                 goto out;
1222         }
1223
1224         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1225         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1226         if (ret)
1227                 goto failed_send;
1228
1229         req->handler = zfcp_fsf_send_ct_handler;
1230         req->qtcb->header.port_handle = wka_port->handle;
1231         ct->d_id = wka_port->d_id;
1232         req->data = ct;
1233
1234         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1235
1236         ret = zfcp_fsf_req_send(req);
1237         if (ret)
1238                 goto failed_send;
1239         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1240
1241         goto out;
1242
1243 failed_send:
1244         zfcp_fsf_req_free(req);
1245 out:
1246         spin_unlock_irq(&qdio->req_q_lock);
1247         return ret;
1248 }
1249
1250 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1251 {
1252         struct zfcp_fsf_ct_els *send_els = req->data;
1253         struct fsf_qtcb_header *header = &req->qtcb->header;
1254
1255         send_els->status = -EINVAL;
1256
1257         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1258                 goto skip_fsfstatus;
1259
1260         switch (header->fsf_status) {
1261         case FSF_GOOD:
1262                 send_els->status = 0;
1263                 zfcp_dbf_san_res("fsselh1", req);
1264                 break;
1265         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1266                 zfcp_fsf_class_not_supp(req);
1267                 break;
1268         case FSF_ADAPTER_STATUS_AVAILABLE:
1269                 switch (header->fsf_status_qual.word[0]){
1270                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1271                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1272                 case FSF_SQ_RETRY_IF_POSSIBLE:
1273                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1274                         break;
1275                 }
1276                 break;
1277         case FSF_ELS_COMMAND_REJECTED:
1278         case FSF_PAYLOAD_SIZE_MISMATCH:
1279         case FSF_REQUEST_SIZE_TOO_LARGE:
1280         case FSF_RESPONSE_SIZE_TOO_LARGE:
1281                 break;
1282         case FSF_SBAL_MISMATCH:
1283                 /* should never occur, avoided in zfcp_fsf_send_els */
1284                 fallthrough;
1285         default:
1286                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1287                 break;
1288         }
1289 skip_fsfstatus:
1290         if (send_els->handler)
1291                 send_els->handler(send_els->handler_data);
1292 }
1293
1294 /**
1295  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1296  * @adapter: pointer to zfcp adapter
1297  * @d_id: N_Port_ID to send ELS to
1298  * @els: pointer to struct zfcp_send_els with data for the command
1299  * @timeout: timeout that hardware should use, and a later software timeout
1300  */
1301 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1302                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1303 {
1304         struct zfcp_fsf_req *req;
1305         struct zfcp_qdio *qdio = adapter->qdio;
1306         int ret = -EIO;
1307
1308         spin_lock_irq(&qdio->req_q_lock);
1309         if (zfcp_qdio_sbal_get(qdio))
1310                 goto out;
1311
1312         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1313                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1314
1315         if (IS_ERR(req)) {
1316                 ret = PTR_ERR(req);
1317                 goto out;
1318         }
1319
1320         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1321
1322         if (!zfcp_adapter_multi_buffer_active(adapter))
1323                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1324
1325         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1326
1327         if (ret)
1328                 goto failed_send;
1329
1330         hton24(req->qtcb->bottom.support.d_id, d_id);
1331         req->handler = zfcp_fsf_send_els_handler;
1332         els->d_id = d_id;
1333         req->data = els;
1334
1335         zfcp_dbf_san_req("fssels1", req, d_id);
1336
1337         ret = zfcp_fsf_req_send(req);
1338         if (ret)
1339                 goto failed_send;
1340         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1341
1342         goto out;
1343
1344 failed_send:
1345         zfcp_fsf_req_free(req);
1346 out:
1347         spin_unlock_irq(&qdio->req_q_lock);
1348         return ret;
1349 }
1350
1351 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1352 {
1353         struct zfcp_fsf_req *req;
1354         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1355         int retval = -EIO;
1356
1357         spin_lock_irq(&qdio->req_q_lock);
1358         if (zfcp_qdio_sbal_get(qdio))
1359                 goto out;
1360
1361         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1362                                   SBAL_SFLAGS0_TYPE_READ,
1363                                   qdio->adapter->pool.erp_req);
1364
1365         if (IS_ERR(req)) {
1366                 retval = PTR_ERR(req);
1367                 goto out;
1368         }
1369
1370         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1371         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1372
1373         req->qtcb->bottom.config.feature_selection =
1374                         FSF_FEATURE_NOTIFICATION_LOST |
1375                         FSF_FEATURE_UPDATE_ALERT |
1376                         FSF_FEATURE_REQUEST_SFP_DATA |
1377                         FSF_FEATURE_FC_SECURITY;
1378         req->erp_action = erp_action;
1379         req->handler = zfcp_fsf_exchange_config_data_handler;
1380         erp_action->fsf_req_id = req->req_id;
1381
1382         zfcp_fsf_start_erp_timer(req);
1383         retval = zfcp_fsf_req_send(req);
1384         if (retval) {
1385                 zfcp_fsf_req_free(req);
1386                 erp_action->fsf_req_id = 0;
1387         }
1388         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1389 out:
1390         spin_unlock_irq(&qdio->req_q_lock);
1391         return retval;
1392 }
1393
1394
1395 /**
1396  * zfcp_fsf_exchange_config_data_sync() - Request information about FCP channel.
1397  * @qdio: pointer to the QDIO-Queue to use for sending the command.
1398  * @data: pointer to the QTCB-Bottom for storing the result of the command,
1399  *        might be %NULL.
1400  *
1401  * Returns:
1402  * * 0          - Exchange Config Data was successful, @data is complete
1403  * * -EIO       - Exchange Config Data was not successful, @data is invalid
1404  * * -EAGAIN    - @data contains incomplete data
1405  * * -ENOMEM    - Some memory allocation failed along the way
1406  */
1407 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1408                                        struct fsf_qtcb_bottom_config *data)
1409 {
1410         struct zfcp_fsf_req *req = NULL;
1411         int retval = -EIO;
1412
1413         spin_lock_irq(&qdio->req_q_lock);
1414         if (zfcp_qdio_sbal_get(qdio))
1415                 goto out_unlock;
1416
1417         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1418                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1419
1420         if (IS_ERR(req)) {
1421                 retval = PTR_ERR(req);
1422                 goto out_unlock;
1423         }
1424
1425         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1426         req->handler = zfcp_fsf_exchange_config_data_handler;
1427
1428         req->qtcb->bottom.config.feature_selection =
1429                         FSF_FEATURE_NOTIFICATION_LOST |
1430                         FSF_FEATURE_UPDATE_ALERT |
1431                         FSF_FEATURE_REQUEST_SFP_DATA |
1432                         FSF_FEATURE_FC_SECURITY;
1433
1434         if (data)
1435                 req->data = data;
1436
1437         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1438         retval = zfcp_fsf_req_send(req);
1439         spin_unlock_irq(&qdio->req_q_lock);
1440
1441         if (!retval) {
1442                 /* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
1443                 wait_for_completion(&req->completion);
1444
1445                 if (req->status &
1446                     (ZFCP_STATUS_FSFREQ_ERROR | ZFCP_STATUS_FSFREQ_DISMISSED))
1447                         retval = -EIO;
1448                 else if (req->status & ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE)
1449                         retval = -EAGAIN;
1450         }
1451
1452         zfcp_fsf_req_free(req);
1453         return retval;
1454
1455 out_unlock:
1456         spin_unlock_irq(&qdio->req_q_lock);
1457         return retval;
1458 }
1459
1460 /**
1461  * zfcp_fsf_exchange_port_data - request information about local port
1462  * @erp_action: ERP action for the adapter for which port data is requested
1463  * Returns: 0 on success, error otherwise
1464  */
1465 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1466 {
1467         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1468         struct zfcp_fsf_req *req;
1469         int retval = -EIO;
1470
1471         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1472                 return -EOPNOTSUPP;
1473
1474         spin_lock_irq(&qdio->req_q_lock);
1475         if (zfcp_qdio_sbal_get(qdio))
1476                 goto out;
1477
1478         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1479                                   SBAL_SFLAGS0_TYPE_READ,
1480                                   qdio->adapter->pool.erp_req);
1481
1482         if (IS_ERR(req)) {
1483                 retval = PTR_ERR(req);
1484                 goto out;
1485         }
1486
1487         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1488         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1489
1490         req->handler = zfcp_fsf_exchange_port_data_handler;
1491         req->erp_action = erp_action;
1492         erp_action->fsf_req_id = req->req_id;
1493
1494         zfcp_fsf_start_erp_timer(req);
1495         retval = zfcp_fsf_req_send(req);
1496         if (retval) {
1497                 zfcp_fsf_req_free(req);
1498                 erp_action->fsf_req_id = 0;
1499         }
1500         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1501 out:
1502         spin_unlock_irq(&qdio->req_q_lock);
1503         return retval;
1504 }
1505
1506 /**
1507  * zfcp_fsf_exchange_port_data_sync() - Request information about local port.
1508  * @qdio: pointer to the QDIO-Queue to use for sending the command.
1509  * @data: pointer to the QTCB-Bottom for storing the result of the command,
1510  *        might be %NULL.
1511  *
1512  * Returns:
1513  * * 0          - Exchange Port Data was successful, @data is complete
1514  * * -EIO       - Exchange Port Data was not successful, @data is invalid
1515  * * -EAGAIN    - @data contains incomplete data
1516  * * -ENOMEM    - Some memory allocation failed along the way
1517  * * -EOPNOTSUPP        - This operation is not supported
1518  */
1519 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1520                                      struct fsf_qtcb_bottom_port *data)
1521 {
1522         struct zfcp_fsf_req *req = NULL;
1523         int retval = -EIO;
1524
1525         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1526                 return -EOPNOTSUPP;
1527
1528         spin_lock_irq(&qdio->req_q_lock);
1529         if (zfcp_qdio_sbal_get(qdio))
1530                 goto out_unlock;
1531
1532         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1533                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1534
1535         if (IS_ERR(req)) {
1536                 retval = PTR_ERR(req);
1537                 goto out_unlock;
1538         }
1539
1540         if (data)
1541                 req->data = data;
1542
1543         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1544
1545         req->handler = zfcp_fsf_exchange_port_data_handler;
1546         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1547         retval = zfcp_fsf_req_send(req);
1548         spin_unlock_irq(&qdio->req_q_lock);
1549
1550         if (!retval) {
1551                 /* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
1552                 wait_for_completion(&req->completion);
1553
1554                 if (req->status &
1555                     (ZFCP_STATUS_FSFREQ_ERROR | ZFCP_STATUS_FSFREQ_DISMISSED))
1556                         retval = -EIO;
1557                 else if (req->status & ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE)
1558                         retval = -EAGAIN;
1559         }
1560
1561         zfcp_fsf_req_free(req);
1562         return retval;
1563
1564 out_unlock:
1565         spin_unlock_irq(&qdio->req_q_lock);
1566         return retval;
1567 }
1568
1569 static void zfcp_fsf_log_port_fc_security(struct zfcp_port *port,
1570                                           struct zfcp_fsf_req *req)
1571 {
1572         char mnemonic_old[ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH];
1573         char mnemonic_new[ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH];
1574
1575         if (port->connection_info == port->connection_info_old) {
1576                 /* no change, no log nor trace */
1577                 return;
1578         }
1579
1580         zfcp_dbf_hba_fsf_fces("fsfcesp", req, port->wwpn,
1581                               port->connection_info_old,
1582                               port->connection_info);
1583
1584         zfcp_fsf_scnprint_fc_security(mnemonic_old, sizeof(mnemonic_old),
1585                                       port->connection_info_old,
1586                                       ZFCP_FSF_PRINT_FMT_SINGLEITEM);
1587         zfcp_fsf_scnprint_fc_security(mnemonic_new, sizeof(mnemonic_new),
1588                                       port->connection_info,
1589                                       ZFCP_FSF_PRINT_FMT_SINGLEITEM);
1590
1591         if (strncmp(mnemonic_old, mnemonic_new,
1592                     ZFCP_FSF_MAX_FC_SECURITY_MNEMONIC_LENGTH) == 0) {
1593                 /* no change in string representation, no log */
1594                 goto out;
1595         }
1596
1597         if (port->connection_info_old == 0) {
1598                 /* activation */
1599                 dev_info(&port->adapter->ccw_device->dev,
1600                          "FC Endpoint Security of connection to remote port 0x%16llx enabled: %s\n",
1601                          port->wwpn, mnemonic_new);
1602         } else if (port->connection_info == 0) {
1603                 /* deactivation */
1604                 dev_warn(&port->adapter->ccw_device->dev,
1605                          "FC Endpoint Security of connection to remote port 0x%16llx disabled: was %s\n",
1606                          port->wwpn, mnemonic_old);
1607         } else {
1608                 /* change */
1609                 dev_warn(&port->adapter->ccw_device->dev,
1610                          "FC Endpoint Security of connection to remote port 0x%16llx changed: from %s to %s\n",
1611                          port->wwpn, mnemonic_old, mnemonic_new);
1612         }
1613
1614 out:
1615         port->connection_info_old = port->connection_info;
1616 }
1617
1618 static void zfcp_fsf_log_security_error(const struct device *dev, u32 fsf_sqw0,
1619                                         u64 wwpn)
1620 {
1621         switch (fsf_sqw0) {
1622
1623         /*
1624          * Open Port command error codes
1625          */
1626
1627         case FSF_SQ_SECURITY_REQUIRED:
1628                 dev_warn_ratelimited(dev,
1629                                      "FC Endpoint Security error: FC security is required but not supported or configured on remote port 0x%016llx\n",
1630                                      wwpn);
1631                 break;
1632         case FSF_SQ_SECURITY_TIMEOUT:
1633                 dev_warn_ratelimited(dev,
1634                                      "FC Endpoint Security error: a timeout prevented opening remote port 0x%016llx\n",
1635                                      wwpn);
1636                 break;
1637         case FSF_SQ_SECURITY_KM_UNAVAILABLE:
1638                 dev_warn_ratelimited(dev,
1639                                      "FC Endpoint Security error: opening remote port 0x%016llx failed because local and external key manager cannot communicate\n",
1640                                      wwpn);
1641                 break;
1642         case FSF_SQ_SECURITY_RKM_UNAVAILABLE:
1643                 dev_warn_ratelimited(dev,
1644                                      "FC Endpoint Security error: opening remote port 0x%016llx failed because it cannot communicate with the external key manager\n",
1645                                      wwpn);
1646                 break;
1647         case FSF_SQ_SECURITY_AUTH_FAILURE:
1648                 dev_warn_ratelimited(dev,
1649                                      "FC Endpoint Security error: the device could not verify the identity of remote port 0x%016llx\n",
1650                                      wwpn);
1651                 break;
1652
1653         /*
1654          * Send FCP command error codes
1655          */
1656
1657         case FSF_SQ_SECURITY_ENC_FAILURE:
1658                 dev_warn_ratelimited(dev,
1659                                      "FC Endpoint Security error: FC connection to remote port 0x%016llx closed because encryption broke down\n",
1660                                      wwpn);
1661                 break;
1662
1663         /*
1664          * Unknown error codes
1665          */
1666
1667         default:
1668                 dev_warn_ratelimited(dev,
1669                                      "FC Endpoint Security error: the device issued an unknown error code 0x%08x related to the FC connection to remote port 0x%016llx\n",
1670                                      fsf_sqw0, wwpn);
1671         }
1672 }
1673
1674 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1675 {
1676         struct zfcp_adapter *adapter = req->adapter;
1677         struct zfcp_port *port = req->data;
1678         struct fsf_qtcb_header *header = &req->qtcb->header;
1679         struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1680         struct fc_els_flogi *plogi;
1681
1682         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1683                 goto out;
1684
1685         switch (header->fsf_status) {
1686         case FSF_PORT_ALREADY_OPEN:
1687                 break;
1688         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1689                 dev_warn(&adapter->ccw_device->dev,
1690                          "Not enough FCP adapter resources to open "
1691                          "remote port 0x%016Lx\n",
1692                          (unsigned long long)port->wwpn);
1693                 zfcp_erp_set_port_status(port,
1694                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1695                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1696                 break;
1697         case FSF_SECURITY_ERROR:
1698                 zfcp_fsf_log_security_error(&req->adapter->ccw_device->dev,
1699                                             header->fsf_status_qual.word[0],
1700                                             port->wwpn);
1701                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1702                 break;
1703         case FSF_ADAPTER_STATUS_AVAILABLE:
1704                 switch (header->fsf_status_qual.word[0]) {
1705                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1706                         /* no zfcp_fc_test_link() with failed open port */
1707                         fallthrough;
1708                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1709                 case FSF_SQ_NO_RETRY_POSSIBLE:
1710                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1711                         break;
1712                 }
1713                 break;
1714         case FSF_GOOD:
1715                 port->handle = header->port_handle;
1716                 if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY)
1717                         port->connection_info = bottom->connection_info;
1718                 else
1719                         port->connection_info = 0;
1720                 zfcp_fsf_log_port_fc_security(port, req);
1721                 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1722                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1723                 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1724                                   &port->status);
1725                 /* check whether D_ID has changed during open */
1726                 /*
1727                  * FIXME: This check is not airtight, as the FCP channel does
1728                  * not monitor closures of target port connections caused on
1729                  * the remote side. Thus, they might miss out on invalidating
1730                  * locally cached WWPNs (and other N_Port parameters) of gone
1731                  * target ports. So, our heroic attempt to make things safe
1732                  * could be undermined by 'open port' response data tagged with
1733                  * obsolete WWPNs. Another reason to monitor potential
1734                  * connection closures ourself at least (by interpreting
1735                  * incoming ELS' and unsolicited status). It just crosses my
1736                  * mind that one should be able to cross-check by means of
1737                  * another GID_PN straight after a port has been opened.
1738                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1739                  */
1740                 plogi = (struct fc_els_flogi *) bottom->els;
1741                 if (bottom->els1_length >= FSF_PLOGI_MIN_LEN)
1742                         zfcp_fc_plogi_evaluate(port, plogi);
1743                 break;
1744         case FSF_UNKNOWN_OP_SUBTYPE:
1745                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1746                 break;
1747         }
1748
1749 out:
1750         put_device(&port->dev);
1751 }
1752
1753 /**
1754  * zfcp_fsf_open_port - create and send open port request
1755  * @erp_action: pointer to struct zfcp_erp_action
1756  * Returns: 0 on success, error otherwise
1757  */
1758 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1759 {
1760         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1761         struct zfcp_port *port = erp_action->port;
1762         struct zfcp_fsf_req *req;
1763         int retval = -EIO;
1764
1765         spin_lock_irq(&qdio->req_q_lock);
1766         if (zfcp_qdio_sbal_get(qdio))
1767                 goto out;
1768
1769         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1770                                   SBAL_SFLAGS0_TYPE_READ,
1771                                   qdio->adapter->pool.erp_req);
1772
1773         if (IS_ERR(req)) {
1774                 retval = PTR_ERR(req);
1775                 goto out;
1776         }
1777
1778         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1779         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1780
1781         req->handler = zfcp_fsf_open_port_handler;
1782         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1783         req->data = port;
1784         req->erp_action = erp_action;
1785         erp_action->fsf_req_id = req->req_id;
1786         get_device(&port->dev);
1787
1788         zfcp_fsf_start_erp_timer(req);
1789         retval = zfcp_fsf_req_send(req);
1790         if (retval) {
1791                 zfcp_fsf_req_free(req);
1792                 erp_action->fsf_req_id = 0;
1793                 put_device(&port->dev);
1794         }
1795         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1796 out:
1797         spin_unlock_irq(&qdio->req_q_lock);
1798         return retval;
1799 }
1800
1801 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1802 {
1803         struct zfcp_port *port = req->data;
1804
1805         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1806                 return;
1807
1808         switch (req->qtcb->header.fsf_status) {
1809         case FSF_PORT_HANDLE_NOT_VALID:
1810                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1811                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1812                 break;
1813         case FSF_ADAPTER_STATUS_AVAILABLE:
1814                 break;
1815         case FSF_GOOD:
1816                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1817                 break;
1818         }
1819 }
1820
1821 /**
1822  * zfcp_fsf_close_port - create and send close port request
1823  * @erp_action: pointer to struct zfcp_erp_action
1824  * Returns: 0 on success, error otherwise
1825  */
1826 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1827 {
1828         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1829         struct zfcp_fsf_req *req;
1830         int retval = -EIO;
1831
1832         spin_lock_irq(&qdio->req_q_lock);
1833         if (zfcp_qdio_sbal_get(qdio))
1834                 goto out;
1835
1836         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1837                                   SBAL_SFLAGS0_TYPE_READ,
1838                                   qdio->adapter->pool.erp_req);
1839
1840         if (IS_ERR(req)) {
1841                 retval = PTR_ERR(req);
1842                 goto out;
1843         }
1844
1845         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1846         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1847
1848         req->handler = zfcp_fsf_close_port_handler;
1849         req->data = erp_action->port;
1850         req->erp_action = erp_action;
1851         req->qtcb->header.port_handle = erp_action->port->handle;
1852         erp_action->fsf_req_id = req->req_id;
1853
1854         zfcp_fsf_start_erp_timer(req);
1855         retval = zfcp_fsf_req_send(req);
1856         if (retval) {
1857                 zfcp_fsf_req_free(req);
1858                 erp_action->fsf_req_id = 0;
1859         }
1860         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1861 out:
1862         spin_unlock_irq(&qdio->req_q_lock);
1863         return retval;
1864 }
1865
1866 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1867 {
1868         struct zfcp_fc_wka_port *wka_port = req->data;
1869         struct fsf_qtcb_header *header = &req->qtcb->header;
1870
1871         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1872                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1873                 goto out;
1874         }
1875
1876         switch (header->fsf_status) {
1877         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1878                 dev_warn(&req->adapter->ccw_device->dev,
1879                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1880                 fallthrough;
1881         case FSF_ADAPTER_STATUS_AVAILABLE:
1882                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1883                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1884                 break;
1885         case FSF_GOOD:
1886                 wka_port->handle = header->port_handle;
1887                 fallthrough;
1888         case FSF_PORT_ALREADY_OPEN:
1889                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1890         }
1891 out:
1892         wake_up(&wka_port->opened);
1893 }
1894
1895 /**
1896  * zfcp_fsf_open_wka_port - create and send open wka-port request
1897  * @wka_port: pointer to struct zfcp_fc_wka_port
1898  * Returns: 0 on success, error otherwise
1899  */
1900 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1901 {
1902         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1903         struct zfcp_fsf_req *req;
1904         unsigned long req_id = 0;
1905         int retval = -EIO;
1906
1907         spin_lock_irq(&qdio->req_q_lock);
1908         if (zfcp_qdio_sbal_get(qdio))
1909                 goto out;
1910
1911         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1912                                   SBAL_SFLAGS0_TYPE_READ,
1913                                   qdio->adapter->pool.erp_req);
1914
1915         if (IS_ERR(req)) {
1916                 retval = PTR_ERR(req);
1917                 goto out;
1918         }
1919
1920         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1921         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1922
1923         req->handler = zfcp_fsf_open_wka_port_handler;
1924         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1925         req->data = wka_port;
1926
1927         req_id = req->req_id;
1928
1929         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1930         retval = zfcp_fsf_req_send(req);
1931         if (retval)
1932                 zfcp_fsf_req_free(req);
1933         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1934 out:
1935         spin_unlock_irq(&qdio->req_q_lock);
1936         if (!retval)
1937                 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req_id);
1938         return retval;
1939 }
1940
1941 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1942 {
1943         struct zfcp_fc_wka_port *wka_port = req->data;
1944
1945         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1946                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1947                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1948         }
1949
1950         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1951         wake_up(&wka_port->closed);
1952 }
1953
1954 /**
1955  * zfcp_fsf_close_wka_port - create and send close wka port request
1956  * @wka_port: WKA port to open
1957  * Returns: 0 on success, error otherwise
1958  */
1959 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1960 {
1961         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1962         struct zfcp_fsf_req *req;
1963         unsigned long req_id = 0;
1964         int retval = -EIO;
1965
1966         spin_lock_irq(&qdio->req_q_lock);
1967         if (zfcp_qdio_sbal_get(qdio))
1968                 goto out;
1969
1970         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1971                                   SBAL_SFLAGS0_TYPE_READ,
1972                                   qdio->adapter->pool.erp_req);
1973
1974         if (IS_ERR(req)) {
1975                 retval = PTR_ERR(req);
1976                 goto out;
1977         }
1978
1979         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1980         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1981
1982         req->handler = zfcp_fsf_close_wka_port_handler;
1983         req->data = wka_port;
1984         req->qtcb->header.port_handle = wka_port->handle;
1985
1986         req_id = req->req_id;
1987
1988         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1989         retval = zfcp_fsf_req_send(req);
1990         if (retval)
1991                 zfcp_fsf_req_free(req);
1992         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1993 out:
1994         spin_unlock_irq(&qdio->req_q_lock);
1995         if (!retval)
1996                 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req_id);
1997         return retval;
1998 }
1999
2000 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
2001 {
2002         struct zfcp_port *port = req->data;
2003         struct fsf_qtcb_header *header = &req->qtcb->header;
2004         struct scsi_device *sdev;
2005
2006         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2007                 return;
2008
2009         switch (header->fsf_status) {
2010         case FSF_PORT_HANDLE_NOT_VALID:
2011                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
2012                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2013                 break;
2014         case FSF_PORT_BOXED:
2015                 /* can't use generic zfcp_erp_modify_port_status because
2016                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
2017                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2018                 shost_for_each_device(sdev, port->adapter->scsi_host)
2019                         if (sdev_to_zfcp(sdev)->port == port)
2020                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
2021                                                   &sdev_to_zfcp(sdev)->status);
2022                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2023                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
2024                                      "fscpph2");
2025                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2026                 break;
2027         case FSF_ADAPTER_STATUS_AVAILABLE:
2028                 switch (header->fsf_status_qual.word[0]) {
2029                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2030                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2031                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2032                         break;
2033                 }
2034                 break;
2035         case FSF_GOOD:
2036                 /* can't use generic zfcp_erp_modify_port_status because
2037                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2038                  */
2039                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2040                 shost_for_each_device(sdev, port->adapter->scsi_host)
2041                         if (sdev_to_zfcp(sdev)->port == port)
2042                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
2043                                                   &sdev_to_zfcp(sdev)->status);
2044                 break;
2045         }
2046 }
2047
2048 /**
2049  * zfcp_fsf_close_physical_port - close physical port
2050  * @erp_action: pointer to struct zfcp_erp_action
2051  * Returns: 0 on success
2052  */
2053 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2054 {
2055         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2056         struct zfcp_fsf_req *req;
2057         int retval = -EIO;
2058
2059         spin_lock_irq(&qdio->req_q_lock);
2060         if (zfcp_qdio_sbal_get(qdio))
2061                 goto out;
2062
2063         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
2064                                   SBAL_SFLAGS0_TYPE_READ,
2065                                   qdio->adapter->pool.erp_req);
2066
2067         if (IS_ERR(req)) {
2068                 retval = PTR_ERR(req);
2069                 goto out;
2070         }
2071
2072         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2073         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2074
2075         req->data = erp_action->port;
2076         req->qtcb->header.port_handle = erp_action->port->handle;
2077         req->erp_action = erp_action;
2078         req->handler = zfcp_fsf_close_physical_port_handler;
2079         erp_action->fsf_req_id = req->req_id;
2080
2081         zfcp_fsf_start_erp_timer(req);
2082         retval = zfcp_fsf_req_send(req);
2083         if (retval) {
2084                 zfcp_fsf_req_free(req);
2085                 erp_action->fsf_req_id = 0;
2086         }
2087         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2088 out:
2089         spin_unlock_irq(&qdio->req_q_lock);
2090         return retval;
2091 }
2092
2093 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
2094 {
2095         struct zfcp_adapter *adapter = req->adapter;
2096         struct scsi_device *sdev = req->data;
2097         struct zfcp_scsi_dev *zfcp_sdev;
2098         struct fsf_qtcb_header *header = &req->qtcb->header;
2099         union fsf_status_qual *qual = &header->fsf_status_qual;
2100
2101         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2102                 return;
2103
2104         zfcp_sdev = sdev_to_zfcp(sdev);
2105
2106         atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2107                           ZFCP_STATUS_COMMON_ACCESS_BOXED,
2108                           &zfcp_sdev->status);
2109
2110         switch (header->fsf_status) {
2111
2112         case FSF_PORT_HANDLE_NOT_VALID:
2113                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
2114                 fallthrough;
2115         case FSF_LUN_ALREADY_OPEN:
2116                 break;
2117         case FSF_PORT_BOXED:
2118                 zfcp_erp_set_port_status(zfcp_sdev->port,
2119                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2120                 zfcp_erp_port_reopen(zfcp_sdev->port,
2121                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
2122                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2123                 break;
2124         case FSF_LUN_SHARING_VIOLATION:
2125                 if (qual->word[0])
2126                         dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
2127                                  "LUN 0x%016Lx on port 0x%016Lx is already in "
2128                                  "use by CSS%d, MIF Image ID %x\n",
2129                                  zfcp_scsi_dev_lun(sdev),
2130                                  (unsigned long long)zfcp_sdev->port->wwpn,
2131                                  qual->fsf_queue_designator.cssid,
2132                                  qual->fsf_queue_designator.hla);
2133                 zfcp_erp_set_lun_status(sdev,
2134                                         ZFCP_STATUS_COMMON_ERP_FAILED |
2135                                         ZFCP_STATUS_COMMON_ACCESS_DENIED);
2136                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2137                 break;
2138         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
2139                 dev_warn(&adapter->ccw_device->dev,
2140                          "No handle is available for LUN "
2141                          "0x%016Lx on port 0x%016Lx\n",
2142                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
2143                          (unsigned long long)zfcp_sdev->port->wwpn);
2144                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
2145                 fallthrough;
2146         case FSF_INVALID_COMMAND_OPTION:
2147                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2148                 break;
2149         case FSF_ADAPTER_STATUS_AVAILABLE:
2150                 switch (header->fsf_status_qual.word[0]) {
2151                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2152                         zfcp_fc_test_link(zfcp_sdev->port);
2153                         fallthrough;
2154                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2155                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2156                         break;
2157                 }
2158                 break;
2159
2160         case FSF_GOOD:
2161                 zfcp_sdev->lun_handle = header->lun_handle;
2162                 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
2163                 break;
2164         }
2165 }
2166
2167 /**
2168  * zfcp_fsf_open_lun - open LUN
2169  * @erp_action: pointer to struct zfcp_erp_action
2170  * Returns: 0 on success, error otherwise
2171  */
2172 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
2173 {
2174         struct zfcp_adapter *adapter = erp_action->adapter;
2175         struct zfcp_qdio *qdio = adapter->qdio;
2176         struct zfcp_fsf_req *req;
2177         int retval = -EIO;
2178
2179         spin_lock_irq(&qdio->req_q_lock);
2180         if (zfcp_qdio_sbal_get(qdio))
2181                 goto out;
2182
2183         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
2184                                   SBAL_SFLAGS0_TYPE_READ,
2185                                   adapter->pool.erp_req);
2186
2187         if (IS_ERR(req)) {
2188                 retval = PTR_ERR(req);
2189                 goto out;
2190         }
2191
2192         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2193         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2194
2195         req->qtcb->header.port_handle = erp_action->port->handle;
2196         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
2197         req->handler = zfcp_fsf_open_lun_handler;
2198         req->data = erp_action->sdev;
2199         req->erp_action = erp_action;
2200         erp_action->fsf_req_id = req->req_id;
2201
2202         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2203                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2204
2205         zfcp_fsf_start_erp_timer(req);
2206         retval = zfcp_fsf_req_send(req);
2207         if (retval) {
2208                 zfcp_fsf_req_free(req);
2209                 erp_action->fsf_req_id = 0;
2210         }
2211         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2212 out:
2213         spin_unlock_irq(&qdio->req_q_lock);
2214         return retval;
2215 }
2216
2217 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
2218 {
2219         struct scsi_device *sdev = req->data;
2220         struct zfcp_scsi_dev *zfcp_sdev;
2221
2222         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2223                 return;
2224
2225         zfcp_sdev = sdev_to_zfcp(sdev);
2226
2227         switch (req->qtcb->header.fsf_status) {
2228         case FSF_PORT_HANDLE_NOT_VALID:
2229                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
2230                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2231                 break;
2232         case FSF_LUN_HANDLE_NOT_VALID:
2233                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
2234                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2235                 break;
2236         case FSF_PORT_BOXED:
2237                 zfcp_erp_set_port_status(zfcp_sdev->port,
2238                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2239                 zfcp_erp_port_reopen(zfcp_sdev->port,
2240                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
2241                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2242                 break;
2243         case FSF_ADAPTER_STATUS_AVAILABLE:
2244                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
2245                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2246                         zfcp_fc_test_link(zfcp_sdev->port);
2247                         fallthrough;
2248                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2249                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2250                         break;
2251                 }
2252                 break;
2253         case FSF_GOOD:
2254                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
2255                 break;
2256         }
2257 }
2258
2259 /**
2260  * zfcp_fsf_close_LUN - close LUN
2261  * @erp_action: pointer to erp_action triggering the "close LUN"
2262  * Returns: 0 on success, error otherwise
2263  */
2264 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
2265 {
2266         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2267         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
2268         struct zfcp_fsf_req *req;
2269         int retval = -EIO;
2270
2271         spin_lock_irq(&qdio->req_q_lock);
2272         if (zfcp_qdio_sbal_get(qdio))
2273                 goto out;
2274
2275         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2276                                   SBAL_SFLAGS0_TYPE_READ,
2277                                   qdio->adapter->pool.erp_req);
2278
2279         if (IS_ERR(req)) {
2280                 retval = PTR_ERR(req);
2281                 goto out;
2282         }
2283
2284         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2285         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2286
2287         req->qtcb->header.port_handle = erp_action->port->handle;
2288         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2289         req->handler = zfcp_fsf_close_lun_handler;
2290         req->data = erp_action->sdev;
2291         req->erp_action = erp_action;
2292         erp_action->fsf_req_id = req->req_id;
2293
2294         zfcp_fsf_start_erp_timer(req);
2295         retval = zfcp_fsf_req_send(req);
2296         if (retval) {
2297                 zfcp_fsf_req_free(req);
2298                 erp_action->fsf_req_id = 0;
2299         }
2300         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2301 out:
2302         spin_unlock_irq(&qdio->req_q_lock);
2303         return retval;
2304 }
2305
2306 static void zfcp_fsf_update_lat(struct zfcp_latency_record *lat_rec, u32 lat)
2307 {
2308         lat_rec->sum += lat;
2309         lat_rec->min = min(lat_rec->min, lat);
2310         lat_rec->max = max(lat_rec->max, lat);
2311 }
2312
2313 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2314 {
2315         struct fsf_qual_latency_info *lat_in;
2316         struct zfcp_latency_cont *lat = NULL;
2317         struct zfcp_scsi_dev *zfcp_sdev;
2318         struct zfcp_blk_drv_data blktrc;
2319         int ticks = req->adapter->timer_ticks;
2320
2321         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2322
2323         blktrc.flags = 0;
2324         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2325         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2326                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2327         blktrc.inb_usage = 0;
2328         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2329
2330         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2331             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2332                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2333                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2334                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2335                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2336
2337                 switch (req->qtcb->bottom.io.data_direction) {
2338                 case FSF_DATADIR_DIF_READ_STRIP:
2339                 case FSF_DATADIR_DIF_READ_CONVERT:
2340                 case FSF_DATADIR_READ:
2341                         lat = &zfcp_sdev->latencies.read;
2342                         break;
2343                 case FSF_DATADIR_DIF_WRITE_INSERT:
2344                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2345                 case FSF_DATADIR_WRITE:
2346                         lat = &zfcp_sdev->latencies.write;
2347                         break;
2348                 case FSF_DATADIR_CMND:
2349                         lat = &zfcp_sdev->latencies.cmd;
2350                         break;
2351                 }
2352
2353                 if (lat) {
2354                         spin_lock(&zfcp_sdev->latencies.lock);
2355                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2356                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2357                         lat->counter++;
2358                         spin_unlock(&zfcp_sdev->latencies.lock);
2359                 }
2360         }
2361
2362         blk_add_driver_data(scsi->request, &blktrc, sizeof(blktrc));
2363 }
2364
2365 /**
2366  * zfcp_fsf_fcp_handler_common() - FCP response handler common to I/O and TMF.
2367  * @req: Pointer to FSF request.
2368  * @sdev: Pointer to SCSI device as request context.
2369  */
2370 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req,
2371                                         struct scsi_device *sdev)
2372 {
2373         struct zfcp_scsi_dev *zfcp_sdev;
2374         struct fsf_qtcb_header *header = &req->qtcb->header;
2375
2376         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2377                 return;
2378
2379         zfcp_sdev = sdev_to_zfcp(sdev);
2380
2381         switch (header->fsf_status) {
2382         case FSF_HANDLE_MISMATCH:
2383         case FSF_PORT_HANDLE_NOT_VALID:
2384                 zfcp_erp_adapter_reopen(req->adapter, 0, "fssfch1");
2385                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2386                 break;
2387         case FSF_FCPLUN_NOT_VALID:
2388         case FSF_LUN_HANDLE_NOT_VALID:
2389                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2390                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2391                 break;
2392         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2393                 zfcp_fsf_class_not_supp(req);
2394                 break;
2395         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2396                 dev_err(&req->adapter->ccw_device->dev,
2397                         "Incorrect direction %d, LUN 0x%016Lx on port "
2398                         "0x%016Lx closed\n",
2399                         req->qtcb->bottom.io.data_direction,
2400                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2401                         (unsigned long long)zfcp_sdev->port->wwpn);
2402                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch3");
2403                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2404                 break;
2405         case FSF_CMND_LENGTH_NOT_VALID:
2406                 dev_err(&req->adapter->ccw_device->dev,
2407                         "Incorrect FCP_CMND length %d, FCP device closed\n",
2408                         req->qtcb->bottom.io.fcp_cmnd_length);
2409                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch4");
2410                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2411                 break;
2412         case FSF_PORT_BOXED:
2413                 zfcp_erp_set_port_status(zfcp_sdev->port,
2414                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2415                 zfcp_erp_port_reopen(zfcp_sdev->port,
2416                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2417                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2418                 break;
2419         case FSF_LUN_BOXED:
2420                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2421                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2422                                     "fssfch6");
2423                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2424                 break;
2425         case FSF_ADAPTER_STATUS_AVAILABLE:
2426                 if (header->fsf_status_qual.word[0] ==
2427                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2428                         zfcp_fc_test_link(zfcp_sdev->port);
2429                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2430                 break;
2431         case FSF_SECURITY_ERROR:
2432                 zfcp_fsf_log_security_error(&req->adapter->ccw_device->dev,
2433                                             header->fsf_status_qual.word[0],
2434                                             zfcp_sdev->port->wwpn);
2435                 zfcp_erp_port_forced_reopen(zfcp_sdev->port, 0, "fssfch7");
2436                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2437                 break;
2438         }
2439 }
2440
2441 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2442 {
2443         struct scsi_cmnd *scpnt;
2444         struct fcp_resp_with_ext *fcp_rsp;
2445         unsigned long flags;
2446
2447         read_lock_irqsave(&req->adapter->abort_lock, flags);
2448
2449         scpnt = req->data;
2450         if (unlikely(!scpnt)) {
2451                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2452                 return;
2453         }
2454
2455         zfcp_fsf_fcp_handler_common(req, scpnt->device);
2456
2457         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2458                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2459                 goto skip_fsfstatus;
2460         }
2461
2462         switch (req->qtcb->header.fsf_status) {
2463         case FSF_INCONSISTENT_PROT_DATA:
2464         case FSF_INVALID_PROT_PARM:
2465                 set_host_byte(scpnt, DID_ERROR);
2466                 goto skip_fsfstatus;
2467         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2468                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2469                 goto skip_fsfstatus;
2470         case FSF_APP_TAG_CHECK_FAILURE:
2471                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2472                 goto skip_fsfstatus;
2473         case FSF_REF_TAG_CHECK_FAILURE:
2474                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2475                 goto skip_fsfstatus;
2476         }
2477         BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2478         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2479         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2480
2481 skip_fsfstatus:
2482         zfcp_fsf_req_trace(req, scpnt);
2483         zfcp_dbf_scsi_result(scpnt, req);
2484
2485         scpnt->host_scribble = NULL;
2486         (scpnt->scsi_done) (scpnt);
2487         /*
2488          * We must hold this lock until scsi_done has been called.
2489          * Otherwise we may call scsi_done after abort regarding this
2490          * command has completed.
2491          * Note: scsi_done must not block!
2492          */
2493         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2494 }
2495
2496 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2497 {
2498         switch (scsi_get_prot_op(scsi_cmnd)) {
2499         case SCSI_PROT_NORMAL:
2500                 switch (scsi_cmnd->sc_data_direction) {
2501                 case DMA_NONE:
2502                         *data_dir = FSF_DATADIR_CMND;
2503                         break;
2504                 case DMA_FROM_DEVICE:
2505                         *data_dir = FSF_DATADIR_READ;
2506                         break;
2507                 case DMA_TO_DEVICE:
2508                         *data_dir = FSF_DATADIR_WRITE;
2509                         break;
2510                 case DMA_BIDIRECTIONAL:
2511                         return -EINVAL;
2512                 }
2513                 break;
2514
2515         case SCSI_PROT_READ_STRIP:
2516                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2517                 break;
2518         case SCSI_PROT_WRITE_INSERT:
2519                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2520                 break;
2521         case SCSI_PROT_READ_PASS:
2522                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2523                 break;
2524         case SCSI_PROT_WRITE_PASS:
2525                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2526                 break;
2527         default:
2528                 return -EINVAL;
2529         }
2530
2531         return 0;
2532 }
2533
2534 /**
2535  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2536  * @scsi_cmnd: scsi command to be sent
2537  */
2538 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2539 {
2540         struct zfcp_fsf_req *req;
2541         struct fcp_cmnd *fcp_cmnd;
2542         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2543         int retval = -EIO;
2544         struct scsi_device *sdev = scsi_cmnd->device;
2545         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2546         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2547         struct zfcp_qdio *qdio = adapter->qdio;
2548         struct fsf_qtcb_bottom_io *io;
2549         unsigned long flags;
2550
2551         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2552                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2553                 return -EBUSY;
2554
2555         spin_lock_irqsave(&qdio->req_q_lock, flags);
2556         if (atomic_read(&qdio->req_q_free) <= 0) {
2557                 atomic_inc(&qdio->req_q_full);
2558                 goto out;
2559         }
2560
2561         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2562                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2563
2564         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2565                                   sbtype, adapter->pool.scsi_req);
2566
2567         if (IS_ERR(req)) {
2568                 retval = PTR_ERR(req);
2569                 goto out;
2570         }
2571
2572         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2573
2574         io = &req->qtcb->bottom.io;
2575         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2576         req->data = scsi_cmnd;
2577         req->handler = zfcp_fsf_fcp_cmnd_handler;
2578         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2579         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2580         io->service_class = FSF_CLASS_3;
2581         io->fcp_cmnd_length = FCP_CMND_LEN;
2582
2583         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2584                 io->data_block_length = scsi_cmnd->device->sector_size;
2585                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2586         }
2587
2588         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2589                 goto failed_scsi_cmnd;
2590
2591         BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2592         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2593         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2594
2595         if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2596             scsi_prot_sg_count(scsi_cmnd)) {
2597                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2598                                        scsi_prot_sg_count(scsi_cmnd));
2599                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2600                                                  scsi_prot_sglist(scsi_cmnd));
2601                 if (retval)
2602                         goto failed_scsi_cmnd;
2603                 io->prot_data_length = zfcp_qdio_real_bytes(
2604                                                 scsi_prot_sglist(scsi_cmnd));
2605         }
2606
2607         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2608                                          scsi_sglist(scsi_cmnd));
2609         if (unlikely(retval))
2610                 goto failed_scsi_cmnd;
2611
2612         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2613         if (zfcp_adapter_multi_buffer_active(adapter))
2614                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2615
2616         retval = zfcp_fsf_req_send(req);
2617         if (unlikely(retval))
2618                 goto failed_scsi_cmnd;
2619         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2620
2621         goto out;
2622
2623 failed_scsi_cmnd:
2624         zfcp_fsf_req_free(req);
2625         scsi_cmnd->host_scribble = NULL;
2626 out:
2627         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2628         return retval;
2629 }
2630
2631 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2632 {
2633         struct scsi_device *sdev = req->data;
2634         struct fcp_resp_with_ext *fcp_rsp;
2635         struct fcp_resp_rsp_info *rsp_info;
2636
2637         zfcp_fsf_fcp_handler_common(req, sdev);
2638
2639         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2640         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2641
2642         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2643              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2644                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2645 }
2646
2647 /**
2648  * zfcp_fsf_fcp_task_mgmt() - Send SCSI task management command (TMF).
2649  * @sdev: Pointer to SCSI device to send the task management command to.
2650  * @tm_flags: Unsigned byte for task management flags.
2651  *
2652  * Return: On success pointer to struct zfcp_fsf_req, %NULL otherwise.
2653  */
2654 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_device *sdev,
2655                                             u8 tm_flags)
2656 {
2657         struct zfcp_fsf_req *req = NULL;
2658         struct fcp_cmnd *fcp_cmnd;
2659         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2660         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2661
2662         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2663                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2664                 return NULL;
2665
2666         spin_lock_irq(&qdio->req_q_lock);
2667         if (zfcp_qdio_sbal_get(qdio))
2668                 goto out;
2669
2670         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2671                                   SBAL_SFLAGS0_TYPE_WRITE,
2672                                   qdio->adapter->pool.scsi_req);
2673
2674         if (IS_ERR(req)) {
2675                 req = NULL;
2676                 goto out;
2677         }
2678
2679         req->data = sdev;
2680
2681         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2682         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2683         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2684         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2685         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2686         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2687
2688         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2689
2690         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2691         zfcp_fc_fcp_tm(fcp_cmnd, sdev, tm_flags);
2692
2693         zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
2694         if (!zfcp_fsf_req_send(req)) {
2695                 /* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
2696                 goto out;
2697         }
2698
2699         zfcp_fsf_req_free(req);
2700         req = NULL;
2701 out:
2702         spin_unlock_irq(&qdio->req_q_lock);
2703         return req;
2704 }
2705
2706 /**
2707  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2708  * @qdio: pointer to struct zfcp_qdio
2709  * @sbal_idx: response queue index of SBAL to be processed
2710  */
2711 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2712 {
2713         struct zfcp_adapter *adapter = qdio->adapter;
2714         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2715         struct qdio_buffer_element *sbale;
2716         struct zfcp_fsf_req *fsf_req;
2717         unsigned long req_id;
2718         int idx;
2719
2720         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2721
2722                 sbale = &sbal->element[idx];
2723                 req_id = sbale->addr;
2724                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2725
2726                 if (!fsf_req) {
2727                         /*
2728                          * Unknown request means that we have potentially memory
2729                          * corruption and must stop the machine immediately.
2730                          */
2731                         zfcp_qdio_siosl(adapter);
2732                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2733                               req_id, dev_name(&adapter->ccw_device->dev));
2734                 }
2735
2736                 zfcp_fsf_req_complete(fsf_req);
2737
2738                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2739                         break;
2740         }
2741 }