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