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, 2018
   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/types.h>
  15 #include <linux/slab.h>
  16 #include <scsi/fc/fc_els.h>
  17 #include "zfcp_ext.h"
  18 #include "zfcp_fc.h"
  19 #include "zfcp_dbf.h"
  20 #include "zfcp_qdio.h"
  21 #include "zfcp_reqlist.h"
  22
  23 /* timeout for FSF requests sent during scsi_eh: abort or FCP TMF */
  24 #define ZFCP_FSF_SCSI_ER_TIMEOUT (10*HZ)
  25 /* timeout for: exchange config/port data outside ERP, or open/close WKA port */
  26 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
  27
  28 struct kmem_cache *zfcp_fsf_qtcb_cache;
  29
  30 static bool ber_stop = true;
  31 module_param(ber_stop, bool, 0600);
  32 MODULE_PARM_DESC(ber_stop,
  33                  "Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)");
  34
  35 static void zfcp_fsf_request_timeout_handler(struct timer_list *t)
  36 {
  37         struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer);
  38         struct zfcp_adapter *adapter = fsf_req->adapter;
  39
  40         zfcp_qdio_siosl(adapter);
  41         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
  42                                 "fsrth_1");
  43 }
  44
  45 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
  46                                  unsigned long timeout)
  47 {
  48         fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
  49         fsf_req->timer.expires = jiffies + timeout;
  50         add_timer(&fsf_req->timer);
  51 }
  52
  53 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
  54 {
  55         BUG_ON(!fsf_req->erp_action);
  56         fsf_req->timer.function = zfcp_erp_timeout_handler;
  57         fsf_req->timer.expires = jiffies + 30 * HZ;
  58         add_timer(&fsf_req->timer);
  59 }
  60
  61 /* association between FSF command and FSF QTCB type */
  62 static u32 fsf_qtcb_type[] = {
  63         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  64         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  65         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  66         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  67         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  68         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  69         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  70         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  71         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  72         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  73         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  74         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  75         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  76 };
  77
  78 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
  79 {
  80         dev_err(&req->adapter->ccw_device->dev, "FCP device not "
  81                 "operational because of an unsupported FC class\n");
  82         zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1");
  83         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
  84 }
  85
  86 /**
  87  * zfcp_fsf_req_free - free memory used by fsf request
  88  * @req: pointer to struct zfcp_fsf_req
  89  */
  90 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
  91 {
  92         if (likely(req->pool)) {
  93                 if (likely(!zfcp_fsf_req_is_status_read_buffer(req)))
  94                         mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
  95                 mempool_free(req, req->pool);
  96                 return;
  97         }
  98
  99         if (likely(!zfcp_fsf_req_is_status_read_buffer(req)))
 100                 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb);
 101         kfree(req);
 102 }
 103
 104 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 105 {
 106         unsigned long flags;
 107         struct fsf_status_read_buffer *sr_buf = req->data;
 108         struct zfcp_adapter *adapter = req->adapter;
 109         struct zfcp_port *port;
 110         int d_id = ntoh24(sr_buf->d_id);
 111
 112         read_lock_irqsave(&adapter->port_list_lock, flags);
 113         list_for_each_entry(port, &adapter->port_list, list)
 114                 if (port->d_id == d_id) {
 115                         zfcp_erp_port_reopen(port, 0, "fssrpc1");
 116                         break;
 117                 }
 118         read_unlock_irqrestore(&adapter->port_list_lock, flags);
 119 }
 120
 121 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req,
 122                                          struct fsf_link_down_info *link_down)
 123 {
 124         struct zfcp_adapter *adapter = req->adapter;
 125
 126         if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 127                 return;
 128
 129         atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 130
 131         zfcp_scsi_schedule_rports_block(adapter);
 132
 133         if (!link_down)
 134                 goto out;
 135
 136         switch (link_down->error_code) {
 137         case FSF_PSQ_LINK_NO_LIGHT:
 138                 dev_warn(&req->adapter->ccw_device->dev,
 139                          "There is no light signal from the local "
 140                          "fibre channel cable\n");
 141                 break;
 142         case FSF_PSQ_LINK_WRAP_PLUG:
 143                 dev_warn(&req->adapter->ccw_device->dev,
 144                          "There is a wrap plug instead of a fibre "
 145                          "channel cable\n");
 146                 break;
 147         case FSF_PSQ_LINK_NO_FCP:
 148                 dev_warn(&req->adapter->ccw_device->dev,
 149                          "The adjacent fibre channel node does not "
 150                          "support FCP\n");
 151                 break;
 152         case FSF_PSQ_LINK_FIRMWARE_UPDATE:
 153                 dev_warn(&req->adapter->ccw_device->dev,
 154                          "The FCP device is suspended because of a "
 155                          "firmware update\n");
 156                 break;
 157         case FSF_PSQ_LINK_INVALID_WWPN:
 158                 dev_warn(&req->adapter->ccw_device->dev,
 159                          "The FCP device detected a WWPN that is "
 160                          "duplicate or not valid\n");
 161                 break;
 162         case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
 163                 dev_warn(&req->adapter->ccw_device->dev,
 164                          "The fibre channel fabric does not support NPIV\n");
 165                 break;
 166         case FSF_PSQ_LINK_NO_FCP_RESOURCES:
 167                 dev_warn(&req->adapter->ccw_device->dev,
 168                          "The FCP adapter cannot support more NPIV ports\n");
 169                 break;
 170         case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
 171                 dev_warn(&req->adapter->ccw_device->dev,
 172                          "The adjacent switch cannot support "
 173                          "more NPIV ports\n");
 174                 break;
 175         case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
 176                 dev_warn(&req->adapter->ccw_device->dev,
 177                          "The FCP adapter could not log in to the "
 178                          "fibre channel fabric\n");
 179                 break;
 180         case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
 181                 dev_warn(&req->adapter->ccw_device->dev,
 182                          "The WWPN assignment file on the FCP adapter "
 183                          "has been damaged\n");
 184                 break;
 185         case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
 186                 dev_warn(&req->adapter->ccw_device->dev,
 187                          "The mode table on the FCP adapter "
 188                          "has been damaged\n");
 189                 break;
 190         case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
 191                 dev_warn(&req->adapter->ccw_device->dev,
 192                          "All NPIV ports on the FCP adapter have "
 193                          "been assigned\n");
 194                 break;
 195         default:
 196                 dev_warn(&req->adapter->ccw_device->dev,
 197                          "The link between the FCP adapter and "
 198                          "the FC fabric is down\n");
 199         }
 200 out:
 201         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 202 }
 203
 204 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 205 {
 206         struct fsf_status_read_buffer *sr_buf = req->data;
 207         struct fsf_link_down_info *ldi =
 208                 (struct fsf_link_down_info *) &sr_buf->payload;
 209
 210         switch (sr_buf->status_subtype) {
 211         case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 212         case FSF_STATUS_READ_SUB_FDISC_FAILED:
 213                 zfcp_fsf_link_down_info_eval(req, ldi);
 214                 break;
 215         case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
 216                 zfcp_fsf_link_down_info_eval(req, NULL);
 217         }
 218 }
 219
 220 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
 221 {
 222         struct zfcp_adapter *adapter = req->adapter;
 223         struct fsf_status_read_buffer *sr_buf = req->data;
 224
 225         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 226                 zfcp_dbf_hba_fsf_uss("fssrh_1", req);
 227                 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 228                 zfcp_fsf_req_free(req);
 229                 return;
 230         }
 231
 232         zfcp_dbf_hba_fsf_uss("fssrh_4", req);
 233
 234         switch (sr_buf->status_type) {
 235         case FSF_STATUS_READ_PORT_CLOSED:
 236                 zfcp_fsf_status_read_port_closed(req);
 237                 break;
 238         case FSF_STATUS_READ_INCOMING_ELS:
 239                 zfcp_fc_incoming_els(req);
 240                 break;
 241         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 242                 break;
 243         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
 244                 zfcp_dbf_hba_bit_err("fssrh_3", req);
 245                 if (ber_stop) {
 246                         dev_warn(&adapter->ccw_device->dev,
 247                                  "All paths over this FCP device are disused because of excessive bit errors\n");
 248                         zfcp_erp_adapter_shutdown(adapter, 0, "fssrh_b");
 249                 } else {
 250                         dev_warn(&adapter->ccw_device->dev,
 251                                  "The error threshold for checksum statistics has been exceeded\n");
 252                 }
 253                 break;
 254         case FSF_STATUS_READ_LINK_DOWN:
 255                 zfcp_fsf_status_read_link_down(req);
 256                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0);
 257                 break;
 258         case FSF_STATUS_READ_LINK_UP:
 259                 dev_info(&adapter->ccw_device->dev,
 260                          "The local link has been restored\n");
 261                 /* All ports should be marked as ready to run again */
 262                 zfcp_erp_set_adapter_status(adapter,
 263                                             ZFCP_STATUS_COMMON_RUNNING);
 264                 zfcp_erp_adapter_reopen(adapter,
 265                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 266                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 267                                         "fssrh_2");
 268                 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0);
 269
 270                 break;
 271         case FSF_STATUS_READ_NOTIFICATION_LOST:
 272                 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
 273                         zfcp_fc_conditional_port_scan(adapter);
 274                 break;
 275         case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
 276                 adapter->adapter_features = sr_buf->payload.word[0];
 277                 break;
 278         }
 279
 280         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 281         zfcp_fsf_req_free(req);
 282
 283         atomic_inc(&adapter->stat_miss);
 284         queue_work(adapter->work_queue, &adapter->stat_work);
 285 }
 286
 287 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
 288 {
 289         switch (req->qtcb->header.fsf_status_qual.word[0]) {
 290         case FSF_SQ_FCP_RSP_AVAILABLE:
 291         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 292         case FSF_SQ_NO_RETRY_POSSIBLE:
 293         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 294                 return;
 295         case FSF_SQ_COMMAND_ABORTED:
 296                 break;
 297         case FSF_SQ_NO_RECOM:
 298                 dev_err(&req->adapter->ccw_device->dev,
 299                         "The FCP adapter reported a problem "
 300                         "that cannot be recovered\n");
 301                 zfcp_qdio_siosl(req->adapter);
 302                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1");
 303                 break;
 304         }
 305         /* all non-return stats set FSFREQ_ERROR*/
 306         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 307 }
 308
 309 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 310 {
 311         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 312                 return;
 313
 314         switch (req->qtcb->header.fsf_status) {
 315         case FSF_UNKNOWN_COMMAND:
 316                 dev_err(&req->adapter->ccw_device->dev,
 317                         "The FCP adapter does not recognize the command 0x%x\n",
 318                         req->qtcb->header.fsf_command);
 319                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1");
 320                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 321                 break;
 322         case FSF_ADAPTER_STATUS_AVAILABLE:
 323                 zfcp_fsf_fsfstatus_qual_eval(req);
 324                 break;
 325         }
 326 }
 327
 328 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
 329 {
 330         struct zfcp_adapter *adapter = req->adapter;
 331         struct fsf_qtcb *qtcb = req->qtcb;
 332         union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 333
 334         zfcp_dbf_hba_fsf_response(req);
 335
 336         if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 337                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 338                 return;
 339         }
 340
 341         switch (qtcb->prefix.prot_status) {
 342         case FSF_PROT_GOOD:
 343         case FSF_PROT_FSF_STATUS_PRESENTED:
 344                 return;
 345         case FSF_PROT_QTCB_VERSION_ERROR:
 346                 dev_err(&adapter->ccw_device->dev,
 347                         "QTCB version 0x%x not supported by FCP adapter "
 348                         "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
 349                         psq->word[0], psq->word[1]);
 350                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1");
 351                 break;
 352         case FSF_PROT_ERROR_STATE:
 353         case FSF_PROT_SEQ_NUMB_ERROR:
 354                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2");
 355                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 356                 break;
 357         case FSF_PROT_UNSUPP_QTCB_TYPE:
 358                 dev_err(&adapter->ccw_device->dev,
 359                         "The QTCB type is not supported by the FCP adapter\n");
 360                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3");
 361                 break;
 362         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 363                 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 364                                 &adapter->status);
 365                 break;
 366         case FSF_PROT_DUPLICATE_REQUEST_ID:
 367                 dev_err(&adapter->ccw_device->dev,
 368                         "0x%Lx is an ambiguous request identifier\n",
 369                         (unsigned long long)qtcb->bottom.support.req_handle);
 370                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4");
 371                 break;
 372         case FSF_PROT_LINK_DOWN:
 373                 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info);
 374                 /* go through reopen to flush pending requests */
 375                 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6");
 376                 break;
 377         case FSF_PROT_REEST_QUEUE:
 378                 /* All ports should be marked as ready to run again */
 379                 zfcp_erp_set_adapter_status(adapter,
 380                                             ZFCP_STATUS_COMMON_RUNNING);
 381                 zfcp_erp_adapter_reopen(adapter,
 382                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 383                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 384                                         "fspse_8");
 385                 break;
 386         default:
 387                 dev_err(&adapter->ccw_device->dev,
 388                         "0x%x is not a valid transfer protocol status\n",
 389                         qtcb->prefix.prot_status);
 390                 zfcp_qdio_siosl(adapter);
 391                 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9");
 392         }
 393         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 394 }
 395
 396 /**
 397  * zfcp_fsf_req_complete - process completion of a FSF request
 398  * @req: The FSF request that has been completed.
 399  *
 400  * When a request has been completed either from the FCP adapter,
 401  * or it has been dismissed due to a queue shutdown, this function
 402  * is called to process the completion status and trigger further
 403  * events related to the FSF request.
 404  */
 405 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 406 {
 407         if (unlikely(zfcp_fsf_req_is_status_read_buffer(req))) {
 408                 zfcp_fsf_status_read_handler(req);
 409                 return;
 410         }
 411
 412         del_timer(&req->timer);
 413         zfcp_fsf_protstatus_eval(req);
 414         zfcp_fsf_fsfstatus_eval(req);
 415         req->handler(req);
 416
 417         if (req->erp_action)
 418                 zfcp_erp_notify(req->erp_action, 0);
 419
 420         if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 421                 zfcp_fsf_req_free(req);
 422         else
 423                 complete(&req->completion);
 424 }
 425
 426 /**
 427  * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
 428  * @adapter: pointer to struct zfcp_adapter
 429  *
 430  * Never ever call this without shutting down the adapter first.
 431  * Otherwise the adapter would continue using and corrupting s390 storage.
 432  * Included BUG_ON() call to ensure this is done.
 433  * ERP is supposed to be the only user of this function.
 434  */
 435 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 436 {
 437         struct zfcp_fsf_req *req, *tmp;
 438         LIST_HEAD(remove_queue);
 439
 440         BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 441         zfcp_reqlist_move(adapter->req_list, &remove_queue);
 442
 443         list_for_each_entry_safe(req, tmp, &remove_queue, list) {
 444                 list_del(&req->list);
 445                 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 446                 zfcp_fsf_req_complete(req);
 447         }
 448 }
 449
 450 #define ZFCP_FSF_PORTSPEED_1GBIT        (1 <<  0)
 451 #define ZFCP_FSF_PORTSPEED_2GBIT        (1 <<  1)
 452 #define ZFCP_FSF_PORTSPEED_4GBIT        (1 <<  2)
 453 #define ZFCP_FSF_PORTSPEED_10GBIT       (1 <<  3)
 454 #define ZFCP_FSF_PORTSPEED_8GBIT        (1 <<  4)
 455 #define ZFCP_FSF_PORTSPEED_16GBIT       (1 <<  5)
 456 #define ZFCP_FSF_PORTSPEED_32GBIT       (1 <<  6)
 457 #define ZFCP_FSF_PORTSPEED_64GBIT       (1 <<  7)
 458 #define ZFCP_FSF_PORTSPEED_128GBIT      (1 <<  8)
 459 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15)
 460
 461 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed)
 462 {
 463         u32 fdmi_speed = 0;
 464         if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT)
 465                 fdmi_speed |= FC_PORTSPEED_1GBIT;
 466         if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT)
 467                 fdmi_speed |= FC_PORTSPEED_2GBIT;
 468         if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT)
 469                 fdmi_speed |= FC_PORTSPEED_4GBIT;
 470         if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT)
 471                 fdmi_speed |= FC_PORTSPEED_10GBIT;
 472         if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT)
 473                 fdmi_speed |= FC_PORTSPEED_8GBIT;
 474         if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT)
 475                 fdmi_speed |= FC_PORTSPEED_16GBIT;
 476         if (fsf_speed & ZFCP_FSF_PORTSPEED_32GBIT)
 477                 fdmi_speed |= FC_PORTSPEED_32GBIT;
 478         if (fsf_speed & ZFCP_FSF_PORTSPEED_64GBIT)
 479                 fdmi_speed |= FC_PORTSPEED_64GBIT;
 480         if (fsf_speed & ZFCP_FSF_PORTSPEED_128GBIT)
 481                 fdmi_speed |= FC_PORTSPEED_128GBIT;
 482         if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED)
 483                 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED;
 484         return fdmi_speed;
 485 }
 486
 487 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 488 {
 489         struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 490         struct zfcp_adapter *adapter = req->adapter;
 491         struct Scsi_Host *shost = adapter->scsi_host;
 492         struct fc_els_flogi *nsp, *plogi;
 493
 494         /* adjust pointers for missing command code */
 495         nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
 496                                         - sizeof(u32));
 497         plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
 498                                         - sizeof(u32));
 499
 500         if (req->data)
 501                 memcpy(req->data, bottom, sizeof(*bottom));
 502
 503         fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn);
 504         fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn);
 505         fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 506
 507         adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK;
 508         adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
 509                                          (u16)FSF_STATUS_READS_RECOM);
 510
 511         if (fc_host_permanent_port_name(shost) == -1)
 512                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 513
 514         zfcp_scsi_set_prot(adapter);
 515
 516         /* no error return above here, otherwise must fix call chains */
 517         /* do not evaluate invalid fields */
 518         if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE)
 519                 return 0;
 520
 521         fc_host_port_id(shost) = ntoh24(bottom->s_id);
 522         fc_host_speed(shost) =
 523                 zfcp_fsf_convert_portspeed(bottom->fc_link_speed);
 524
 525         adapter->hydra_version = bottom->adapter_type;
 526
 527         switch (bottom->fc_topology) {
 528         case FSF_TOPO_P2P:
 529                 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
 530                 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn);
 531                 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn);
 532                 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 533                 break;
 534         case FSF_TOPO_FABRIC:
 535                 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE)
 536                         fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 537                 else
 538                         fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
 539                 break;
 540         case FSF_TOPO_AL:
 541                 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
 542                 /* fall through */
 543         default:
 544                 dev_err(&adapter->ccw_device->dev,
 545                         "Unknown or unsupported arbitrated loop "
 546                         "fibre channel topology detected\n");
 547                 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1");
 548                 return -EIO;
 549         }
 550
 551         return 0;
 552 }
 553
 554 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 555 {
 556         struct zfcp_adapter *adapter = req->adapter;
 557         struct fsf_qtcb *qtcb = req->qtcb;
 558         struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
 559         struct Scsi_Host *shost = adapter->scsi_host;
 560
 561         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 562                 return;
 563
 564         adapter->fsf_lic_version = bottom->lic_version;
 565         adapter->adapter_features = bottom->adapter_features;
 566         adapter->connection_features = bottom->connection_features;
 567         adapter->peer_wwpn = 0;
 568         adapter->peer_wwnn = 0;
 569         adapter->peer_d_id = 0;
 570
 571         switch (qtcb->header.fsf_status) {
 572         case FSF_GOOD:
 573                 if (zfcp_fsf_exchange_config_evaluate(req))
 574                         return;
 575
 576                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
 577                         dev_err(&adapter->ccw_device->dev,
 578                                 "FCP adapter maximum QTCB size (%d bytes) "
 579                                 "is too small\n",
 580                                 bottom->max_qtcb_size);
 581                         zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1");
 582                         return;
 583                 }
 584                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 585                                 &adapter->status);
 586                 break;
 587         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 588                 fc_host_node_name(shost) = 0;
 589                 fc_host_port_name(shost) = 0;
 590                 fc_host_port_id(shost) = 0;
 591                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 592                 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 593                 adapter->hydra_version = 0;
 594
 595                 /* avoids adapter shutdown to be able to recognize
 596                  * events such as LINK UP */
 597                 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
 598                                 &adapter->status);
 599                 zfcp_fsf_link_down_info_eval(req,
 600                         &qtcb->header.fsf_status_qual.link_down_info);
 601                 if (zfcp_fsf_exchange_config_evaluate(req))
 602                         return;
 603                 break;
 604         default:
 605                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3");
 606                 return;
 607         }
 608
 609         if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
 610                 adapter->hardware_version = bottom->hardware_version;
 611                 memcpy(fc_host_serial_number(shost), bottom->serial_number,
 612                        min(FC_SERIAL_NUMBER_SIZE, 17));
 613                 EBCASC(fc_host_serial_number(shost),
 614                        min(FC_SERIAL_NUMBER_SIZE, 17));
 615         }
 616
 617         if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
 618                 dev_err(&adapter->ccw_device->dev,
 619                         "The FCP adapter only supports newer "
 620                         "control block versions\n");
 621                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4");
 622                 return;
 623         }
 624         if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
 625                 dev_err(&adapter->ccw_device->dev,
 626                         "The FCP adapter only supports older "
 627                         "control block versions\n");
 628                 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5");
 629         }
 630 }
 631
 632 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
 633 {
 634         struct zfcp_adapter *adapter = req->adapter;
 635         struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
 636         struct Scsi_Host *shost = adapter->scsi_host;
 637
 638         if (req->data)
 639                 memcpy(req->data, bottom, sizeof(*bottom));
 640
 641         if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
 642                 fc_host_permanent_port_name(shost) = bottom->wwpn;
 643         } else
 644                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 645         fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
 646         fc_host_supported_speeds(shost) =
 647                 zfcp_fsf_convert_portspeed(bottom->supported_speed);
 648         memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types,
 649                FC_FC4_LIST_SIZE);
 650         memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types,
 651                FC_FC4_LIST_SIZE);
 652 }
 653
 654 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 655 {
 656         struct fsf_qtcb *qtcb = req->qtcb;
 657
 658         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 659                 return;
 660
 661         switch (qtcb->header.fsf_status) {
 662         case FSF_GOOD:
 663                 zfcp_fsf_exchange_port_evaluate(req);
 664                 break;
 665         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
 666                 zfcp_fsf_exchange_port_evaluate(req);
 667                 zfcp_fsf_link_down_info_eval(req,
 668                         &qtcb->header.fsf_status_qual.link_down_info);
 669                 break;
 670         }
 671 }
 672
 673 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 674 {
 675         struct zfcp_fsf_req *req;
 676
 677         if (likely(pool))
 678                 req = mempool_alloc(pool, GFP_ATOMIC);
 679         else
 680                 req = kmalloc(sizeof(*req), GFP_ATOMIC);
 681
 682         if (unlikely(!req))
 683                 return NULL;
 684
 685         memset(req, 0, sizeof(*req));
 686         req->pool = pool;
 687         return req;
 688 }
 689
 690 static struct fsf_qtcb *zfcp_fsf_qtcb_alloc(mempool_t *pool)
 691 {
 692         struct fsf_qtcb *qtcb;
 693
 694         if (likely(pool))
 695                 qtcb = mempool_alloc(pool, GFP_ATOMIC);
 696         else
 697                 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC);
 698
 699         if (unlikely(!qtcb))
 700                 return NULL;
 701
 702         memset(qtcb, 0, sizeof(*qtcb));
 703         return qtcb;
 704 }
 705
 706 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 707                                                 u32 fsf_cmd, u8 sbtype,
 708                                                 mempool_t *pool)
 709 {
 710         struct zfcp_adapter *adapter = qdio->adapter;
 711         struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 712
 713         if (unlikely(!req))
 714                 return ERR_PTR(-ENOMEM);
 715
 716         if (adapter->req_no == 0)
 717                 adapter->req_no++;
 718
 719         INIT_LIST_HEAD(&req->list);
 720         timer_setup(&req->timer, NULL, 0);
 721         init_completion(&req->completion);
 722
 723         req->adapter = adapter;
 724         req->req_id = adapter->req_no;
 725
 726         if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
 727                 if (likely(pool))
 728                         req->qtcb = zfcp_fsf_qtcb_alloc(
 729                                 adapter->pool.qtcb_pool);
 730                 else
 731                         req->qtcb = zfcp_fsf_qtcb_alloc(NULL);
 732
 733                 if (unlikely(!req->qtcb)) {
 734                         zfcp_fsf_req_free(req);
 735                         return ERR_PTR(-ENOMEM);
 736                 }
 737
 738                 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 739                 req->qtcb->prefix.req_id = req->req_id;
 740                 req->qtcb->prefix.ulp_info = 26;
 741                 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
 742                 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
 743                 req->qtcb->header.req_handle = req->req_id;
 744                 req->qtcb->header.fsf_command = fsf_cmd;
 745         }
 746
 747         zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype,
 748                            req->qtcb, sizeof(struct fsf_qtcb));
 749
 750         return req;
 751 }
 752
 753 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 754 {
 755         const bool is_srb = zfcp_fsf_req_is_status_read_buffer(req);
 756         struct zfcp_adapter *adapter = req->adapter;
 757         struct zfcp_qdio *qdio = adapter->qdio;
 758         int req_id = req->req_id;
 759
 760         zfcp_reqlist_add(adapter->req_list, req);
 761
 762         req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 763         req->issued = get_tod_clock();
 764         if (zfcp_qdio_send(qdio, &req->qdio_req)) {
 765                 del_timer(&req->timer);
 766                 /* lookup request again, list might have changed */
 767                 zfcp_reqlist_find_rm(adapter->req_list, req_id);
 768                 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
 769                 return -EIO;
 770         }
 771
 772         /*
 773          * NOTE: DO NOT TOUCH ASYNC req PAST THIS POINT.
 774          *       ONLY TOUCH SYNC req AGAIN ON req->completion.
 775          *
 776          * The request might complete and be freed concurrently at any point
 777          * now. This is not protected by the QDIO-lock (req_q_lock). So any
 778          * uncontrolled access after this might result in an use-after-free bug.
 779          * Only if the request doesn't have ZFCP_STATUS_FSFREQ_CLEANUP set, and
 780          * when it is completed via req->completion, is it safe to use req
 781          * again.
 782          */
 783
 784         /* Don't increase for unsolicited status */
 785         if (!is_srb)
 786                 adapter->fsf_req_seq_no++;
 787         adapter->req_no++;
 788
 789         return 0;
 790 }
 791
 792 /**
 793  * zfcp_fsf_status_read - send status read request
 794  * @qdio: pointer to struct zfcp_qdio
 795  * Returns: 0 on success, ERROR otherwise
 796  */
 797 int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 798 {
 799         struct zfcp_adapter *adapter = qdio->adapter;
 800         struct zfcp_fsf_req *req;
 801         struct fsf_status_read_buffer *sr_buf;
 802         struct page *page;
 803         int retval = -EIO;
 804
 805         spin_lock_irq(&qdio->req_q_lock);
 806         if (zfcp_qdio_sbal_get(qdio))
 807                 goto out;
 808
 809         req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 810                                   SBAL_SFLAGS0_TYPE_STATUS,
 811                                   adapter->pool.status_read_req);
 812         if (IS_ERR(req)) {
 813                 retval = PTR_ERR(req);
 814                 goto out;
 815         }
 816
 817         page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC);
 818         if (!page) {
 819                 retval = -ENOMEM;
 820                 goto failed_buf;
 821         }
 822         sr_buf = page_address(page);
 823         memset(sr_buf, 0, sizeof(*sr_buf));
 824         req->data = sr_buf;
 825
 826         zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf));
 827         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 828
 829         retval = zfcp_fsf_req_send(req);
 830         if (retval)
 831                 goto failed_req_send;
 832         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
 833
 834         goto out;
 835
 836 failed_req_send:
 837         req->data = NULL;
 838         mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data);
 839 failed_buf:
 840         zfcp_dbf_hba_fsf_uss("fssr__1", req);
 841         zfcp_fsf_req_free(req);
 842 out:
 843         spin_unlock_irq(&qdio->req_q_lock);
 844         return retval;
 845 }
 846
 847 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
 848 {
 849         struct scsi_device *sdev = req->data;
 850         struct zfcp_scsi_dev *zfcp_sdev;
 851         union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
 852
 853         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 854                 return;
 855
 856         zfcp_sdev = sdev_to_zfcp(sdev);
 857
 858         switch (req->qtcb->header.fsf_status) {
 859         case FSF_PORT_HANDLE_NOT_VALID:
 860                 if (fsq->word[0] == fsq->word[1]) {
 861                         zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0,
 862                                                 "fsafch1");
 863                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 864                 }
 865                 break;
 866         case FSF_LUN_HANDLE_NOT_VALID:
 867                 if (fsq->word[0] == fsq->word[1]) {
 868                         zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2");
 869                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 870                 }
 871                 break;
 872         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
 873                 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 874                 break;
 875         case FSF_PORT_BOXED:
 876                 zfcp_erp_set_port_status(zfcp_sdev->port,
 877                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
 878                 zfcp_erp_port_reopen(zfcp_sdev->port,
 879                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3");
 880                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 881                 break;
 882         case FSF_LUN_BOXED:
 883                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
 884                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 885                                     "fsafch4");
 886                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 887                 break;
 888         case FSF_ADAPTER_STATUS_AVAILABLE:
 889                 switch (fsq->word[0]) {
 890                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 891                         zfcp_fc_test_link(zfcp_sdev->port);
 892                         /* fall through */
 893                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 894                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 895                         break;
 896                 }
 897                 break;
 898         case FSF_GOOD:
 899                 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 900                 break;
 901         }
 902 }
 903
 904 /**
 905  * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command
 906  * @scmnd: The SCSI command to abort
 907  * Returns: pointer to struct zfcp_fsf_req
 908  */
 909
 910 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd)
 911 {
 912         struct zfcp_fsf_req *req = NULL;
 913         struct scsi_device *sdev = scmnd->device;
 914         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
 915         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
 916         unsigned long old_req_id = (unsigned long) scmnd->host_scribble;
 917
 918         spin_lock_irq(&qdio->req_q_lock);
 919         if (zfcp_qdio_sbal_get(qdio))
 920                 goto out;
 921         req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
 922                                   SBAL_SFLAGS0_TYPE_READ,
 923                                   qdio->adapter->pool.scsi_abort);
 924         if (IS_ERR(req)) {
 925                 req = NULL;
 926                 goto out;
 927         }
 928
 929         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
 930                        ZFCP_STATUS_COMMON_UNBLOCKED)))
 931                 goto out_error_free;
 932
 933         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
 934
 935         req->data = sdev;
 936         req->handler = zfcp_fsf_abort_fcp_command_handler;
 937         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
 938         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
 939         req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 940
 941         zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
 942         if (!zfcp_fsf_req_send(req)) {
 943                 /* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
 944                 goto out;
 945         }
 946
 947 out_error_free:
 948         zfcp_fsf_req_free(req);
 949         req = NULL;
 950 out:
 951         spin_unlock_irq(&qdio->req_q_lock);
 952         return req;
 953 }
 954
 955 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 956 {
 957         struct zfcp_adapter *adapter = req->adapter;
 958         struct zfcp_fsf_ct_els *ct = req->data;
 959         struct fsf_qtcb_header *header = &req->qtcb->header;
 960
 961         ct->status = -EINVAL;
 962
 963         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 964                 goto skip_fsfstatus;
 965
 966         switch (header->fsf_status) {
 967         case FSF_GOOD:
 968                 ct->status = 0;
 969                 zfcp_dbf_san_res("fsscth2", req);
 970                 break;
 971         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
 972                 zfcp_fsf_class_not_supp(req);
 973                 break;
 974         case FSF_ADAPTER_STATUS_AVAILABLE:
 975                 switch (header->fsf_status_qual.word[0]){
 976                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 977                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 978                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 979                         break;
 980                 }
 981                 break;
 982         case FSF_PORT_BOXED:
 983                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 984                 break;
 985         case FSF_PORT_HANDLE_NOT_VALID:
 986                 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1");
 987                 /* fall through */
 988         case FSF_GENERIC_COMMAND_REJECTED:
 989         case FSF_PAYLOAD_SIZE_MISMATCH:
 990         case FSF_REQUEST_SIZE_TOO_LARGE:
 991         case FSF_RESPONSE_SIZE_TOO_LARGE:
 992         case FSF_SBAL_MISMATCH:
 993                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 994                 break;
 995         }
 996
 997 skip_fsfstatus:
 998         if (ct->handler)
 999                 ct->handler(ct->handler_data);
1000 }
1001
1002 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio,
1003                                             struct zfcp_qdio_req *q_req,
1004                                             struct scatterlist *sg_req,
1005                                             struct scatterlist *sg_resp)
1006 {
1007         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length);
1008         zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length);
1009         zfcp_qdio_set_sbale_last(qdio, q_req);
1010 }
1011
1012 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1013                                        struct scatterlist *sg_req,
1014                                        struct scatterlist *sg_resp)
1015 {
1016         struct zfcp_adapter *adapter = req->adapter;
1017         struct zfcp_qdio *qdio = adapter->qdio;
1018         struct fsf_qtcb *qtcb = req->qtcb;
1019         u32 feat = adapter->adapter_features;
1020
1021         if (zfcp_adapter_multi_buffer_active(adapter)) {
1022                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1023                         return -EIO;
1024                 qtcb->bottom.support.req_buf_length =
1025                         zfcp_qdio_real_bytes(sg_req);
1026                 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1027                         return -EIO;
1028                 qtcb->bottom.support.resp_buf_length =
1029                         zfcp_qdio_real_bytes(sg_resp);
1030
1031                 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req));
1032                 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1033                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
1034                 return 0;
1035         }
1036
1037         /* use single, unchained SBAL if it can hold the request */
1038         if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
1039                 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
1040                                                 sg_req, sg_resp);
1041                 return 0;
1042         }
1043
1044         if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
1045                 return -EOPNOTSUPP;
1046
1047         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
1048                 return -EIO;
1049
1050         qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
1051
1052         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1053         zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
1054
1055         if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
1056                 return -EIO;
1057
1058         qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
1059
1060         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1061
1062         return 0;
1063 }
1064
1065 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1066                                  struct scatterlist *sg_req,
1067                                  struct scatterlist *sg_resp,
1068                                  unsigned int timeout)
1069 {
1070         int ret;
1071
1072         ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp);
1073         if (ret)
1074                 return ret;
1075
1076         /* common settings for ct/gs and els requests */
1077         if (timeout > 255)
1078                 timeout = 255; /* max value accepted by hardware */
1079         req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1080         req->qtcb->bottom.support.timeout = timeout;
1081         zfcp_fsf_start_timer(req, (timeout + 10) * HZ);
1082
1083         return 0;
1084 }
1085
1086 /**
1087  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1088  * @wka_port: pointer to zfcp WKA port to send CT/GS to
1089  * @ct: pointer to struct zfcp_send_ct with data for request
1090  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1091  * @timeout: timeout that hardware should use, and a later software timeout
1092  */
1093 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1094                      struct zfcp_fsf_ct_els *ct, mempool_t *pool,
1095                      unsigned int timeout)
1096 {
1097         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1098         struct zfcp_fsf_req *req;
1099         int ret = -EIO;
1100
1101         spin_lock_irq(&qdio->req_q_lock);
1102         if (zfcp_qdio_sbal_get(qdio))
1103                 goto out;
1104
1105         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC,
1106                                   SBAL_SFLAGS0_TYPE_WRITE_READ, pool);
1107
1108         if (IS_ERR(req)) {
1109                 ret = PTR_ERR(req);
1110                 goto out;
1111         }
1112
1113         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1114         ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout);
1115         if (ret)
1116                 goto failed_send;
1117
1118         req->handler = zfcp_fsf_send_ct_handler;
1119         req->qtcb->header.port_handle = wka_port->handle;
1120         ct->d_id = wka_port->d_id;
1121         req->data = ct;
1122
1123         zfcp_dbf_san_req("fssct_1", req, wka_port->d_id);
1124
1125         ret = zfcp_fsf_req_send(req);
1126         if (ret)
1127                 goto failed_send;
1128         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1129
1130         goto out;
1131
1132 failed_send:
1133         zfcp_fsf_req_free(req);
1134 out:
1135         spin_unlock_irq(&qdio->req_q_lock);
1136         return ret;
1137 }
1138
1139 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1140 {
1141         struct zfcp_fsf_ct_els *send_els = req->data;
1142         struct fsf_qtcb_header *header = &req->qtcb->header;
1143
1144         send_els->status = -EINVAL;
1145
1146         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1147                 goto skip_fsfstatus;
1148
1149         switch (header->fsf_status) {
1150         case FSF_GOOD:
1151                 send_els->status = 0;
1152                 zfcp_dbf_san_res("fsselh1", req);
1153                 break;
1154         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1155                 zfcp_fsf_class_not_supp(req);
1156                 break;
1157         case FSF_ADAPTER_STATUS_AVAILABLE:
1158                 switch (header->fsf_status_qual.word[0]){
1159                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1160                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1161                 case FSF_SQ_RETRY_IF_POSSIBLE:
1162                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1163                         break;
1164                 }
1165                 break;
1166         case FSF_ELS_COMMAND_REJECTED:
1167         case FSF_PAYLOAD_SIZE_MISMATCH:
1168         case FSF_REQUEST_SIZE_TOO_LARGE:
1169         case FSF_RESPONSE_SIZE_TOO_LARGE:
1170                 break;
1171         case FSF_SBAL_MISMATCH:
1172                 /* should never occur, avoided in zfcp_fsf_send_els */
1173                 /* fall through */
1174         default:
1175                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1176                 break;
1177         }
1178 skip_fsfstatus:
1179         if (send_els->handler)
1180                 send_els->handler(send_els->handler_data);
1181 }
1182
1183 /**
1184  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1185  * @adapter: pointer to zfcp adapter
1186  * @d_id: N_Port_ID to send ELS to
1187  * @els: pointer to struct zfcp_send_els with data for the command
1188  * @timeout: timeout that hardware should use, and a later software timeout
1189  */
1190 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1191                       struct zfcp_fsf_ct_els *els, unsigned int timeout)
1192 {
1193         struct zfcp_fsf_req *req;
1194         struct zfcp_qdio *qdio = adapter->qdio;
1195         int ret = -EIO;
1196
1197         spin_lock_irq(&qdio->req_q_lock);
1198         if (zfcp_qdio_sbal_get(qdio))
1199                 goto out;
1200
1201         req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS,
1202                                   SBAL_SFLAGS0_TYPE_WRITE_READ, NULL);
1203
1204         if (IS_ERR(req)) {
1205                 ret = PTR_ERR(req);
1206                 goto out;
1207         }
1208
1209         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1210
1211         if (!zfcp_adapter_multi_buffer_active(adapter))
1212                 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
1213
1214         ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
1215
1216         if (ret)
1217                 goto failed_send;
1218
1219         hton24(req->qtcb->bottom.support.d_id, d_id);
1220         req->handler = zfcp_fsf_send_els_handler;
1221         els->d_id = d_id;
1222         req->data = els;
1223
1224         zfcp_dbf_san_req("fssels1", req, d_id);
1225
1226         ret = zfcp_fsf_req_send(req);
1227         if (ret)
1228                 goto failed_send;
1229         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1230
1231         goto out;
1232
1233 failed_send:
1234         zfcp_fsf_req_free(req);
1235 out:
1236         spin_unlock_irq(&qdio->req_q_lock);
1237         return ret;
1238 }
1239
1240 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1241 {
1242         struct zfcp_fsf_req *req;
1243         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1244         int retval = -EIO;
1245
1246         spin_lock_irq(&qdio->req_q_lock);
1247         if (zfcp_qdio_sbal_get(qdio))
1248                 goto out;
1249
1250         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1251                                   SBAL_SFLAGS0_TYPE_READ,
1252                                   qdio->adapter->pool.erp_req);
1253
1254         if (IS_ERR(req)) {
1255                 retval = PTR_ERR(req);
1256                 goto out;
1257         }
1258
1259         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1260         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1261
1262         req->qtcb->bottom.config.feature_selection =
1263                         FSF_FEATURE_NOTIFICATION_LOST |
1264                         FSF_FEATURE_UPDATE_ALERT;
1265         req->erp_action = erp_action;
1266         req->handler = zfcp_fsf_exchange_config_data_handler;
1267         erp_action->fsf_req_id = req->req_id;
1268
1269         zfcp_fsf_start_erp_timer(req);
1270         retval = zfcp_fsf_req_send(req);
1271         if (retval) {
1272                 zfcp_fsf_req_free(req);
1273                 erp_action->fsf_req_id = 0;
1274         }
1275         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1276 out:
1277         spin_unlock_irq(&qdio->req_q_lock);
1278         return retval;
1279 }
1280
1281 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
1282                                        struct fsf_qtcb_bottom_config *data)
1283 {
1284         struct zfcp_fsf_req *req = NULL;
1285         int retval = -EIO;
1286
1287         spin_lock_irq(&qdio->req_q_lock);
1288         if (zfcp_qdio_sbal_get(qdio))
1289                 goto out_unlock;
1290
1291         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1292                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1293
1294         if (IS_ERR(req)) {
1295                 retval = PTR_ERR(req);
1296                 goto out_unlock;
1297         }
1298
1299         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1300         req->handler = zfcp_fsf_exchange_config_data_handler;
1301
1302         req->qtcb->bottom.config.feature_selection =
1303                         FSF_FEATURE_NOTIFICATION_LOST |
1304                         FSF_FEATURE_UPDATE_ALERT;
1305
1306         if (data)
1307                 req->data = data;
1308
1309         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1310         retval = zfcp_fsf_req_send(req);
1311         spin_unlock_irq(&qdio->req_q_lock);
1312         if (!retval) {
1313                 /* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
1314                 wait_for_completion(&req->completion);
1315         }
1316
1317         zfcp_fsf_req_free(req);
1318         return retval;
1319
1320 out_unlock:
1321         spin_unlock_irq(&qdio->req_q_lock);
1322         return retval;
1323 }
1324
1325 /**
1326  * zfcp_fsf_exchange_port_data - request information about local port
1327  * @erp_action: ERP action for the adapter for which port data is requested
1328  * Returns: 0 on success, error otherwise
1329  */
1330 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1331 {
1332         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1333         struct zfcp_fsf_req *req;
1334         int retval = -EIO;
1335
1336         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1337                 return -EOPNOTSUPP;
1338
1339         spin_lock_irq(&qdio->req_q_lock);
1340         if (zfcp_qdio_sbal_get(qdio))
1341                 goto out;
1342
1343         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1344                                   SBAL_SFLAGS0_TYPE_READ,
1345                                   qdio->adapter->pool.erp_req);
1346
1347         if (IS_ERR(req)) {
1348                 retval = PTR_ERR(req);
1349                 goto out;
1350         }
1351
1352         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1353         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1354
1355         req->handler = zfcp_fsf_exchange_port_data_handler;
1356         req->erp_action = erp_action;
1357         erp_action->fsf_req_id = req->req_id;
1358
1359         zfcp_fsf_start_erp_timer(req);
1360         retval = zfcp_fsf_req_send(req);
1361         if (retval) {
1362                 zfcp_fsf_req_free(req);
1363                 erp_action->fsf_req_id = 0;
1364         }
1365         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1366 out:
1367         spin_unlock_irq(&qdio->req_q_lock);
1368         return retval;
1369 }
1370
1371 /**
1372  * zfcp_fsf_exchange_port_data_sync - request information about local port
1373  * @qdio: pointer to struct zfcp_qdio
1374  * @data: pointer to struct fsf_qtcb_bottom_port
1375  * Returns: 0 on success, error otherwise
1376  */
1377 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
1378                                      struct fsf_qtcb_bottom_port *data)
1379 {
1380         struct zfcp_fsf_req *req = NULL;
1381         int retval = -EIO;
1382
1383         if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
1384                 return -EOPNOTSUPP;
1385
1386         spin_lock_irq(&qdio->req_q_lock);
1387         if (zfcp_qdio_sbal_get(qdio))
1388                 goto out_unlock;
1389
1390         req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1391                                   SBAL_SFLAGS0_TYPE_READ, NULL);
1392
1393         if (IS_ERR(req)) {
1394                 retval = PTR_ERR(req);
1395                 goto out_unlock;
1396         }
1397
1398         if (data)
1399                 req->data = data;
1400
1401         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1402
1403         req->handler = zfcp_fsf_exchange_port_data_handler;
1404         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1405         retval = zfcp_fsf_req_send(req);
1406         spin_unlock_irq(&qdio->req_q_lock);
1407
1408         if (!retval) {
1409                 /* NOTE: ONLY TOUCH SYNC req AGAIN ON req->completion. */
1410                 wait_for_completion(&req->completion);
1411         }
1412
1413         zfcp_fsf_req_free(req);
1414
1415         return retval;
1416
1417 out_unlock:
1418         spin_unlock_irq(&qdio->req_q_lock);
1419         return retval;
1420 }
1421
1422 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1423 {
1424         struct zfcp_port *port = req->data;
1425         struct fsf_qtcb_header *header = &req->qtcb->header;
1426         struct fc_els_flogi *plogi;
1427
1428         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1429                 goto out;
1430
1431         switch (header->fsf_status) {
1432         case FSF_PORT_ALREADY_OPEN:
1433                 break;
1434         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1435                 dev_warn(&req->adapter->ccw_device->dev,
1436                          "Not enough FCP adapter resources to open "
1437                          "remote port 0x%016Lx\n",
1438                          (unsigned long long)port->wwpn);
1439                 zfcp_erp_set_port_status(port,
1440                                          ZFCP_STATUS_COMMON_ERP_FAILED);
1441                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1442                 break;
1443         case FSF_ADAPTER_STATUS_AVAILABLE:
1444                 switch (header->fsf_status_qual.word[0]) {
1445                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1446                         /* no zfcp_fc_test_link() with failed open port */
1447                         /* fall through */
1448                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1449                 case FSF_SQ_NO_RETRY_POSSIBLE:
1450                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1451                         break;
1452                 }
1453                 break;
1454         case FSF_GOOD:
1455                 port->handle = header->port_handle;
1456                 atomic_or(ZFCP_STATUS_COMMON_OPEN |
1457                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1458                 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED,
1459                                   &port->status);
1460                 /* check whether D_ID has changed during open */
1461                 /*
1462                  * FIXME: This check is not airtight, as the FCP channel does
1463                  * not monitor closures of target port connections caused on
1464                  * the remote side. Thus, they might miss out on invalidating
1465                  * locally cached WWPNs (and other N_Port parameters) of gone
1466                  * target ports. So, our heroic attempt to make things safe
1467                  * could be undermined by 'open port' response data tagged with
1468                  * obsolete WWPNs. Another reason to monitor potential
1469                  * connection closures ourself at least (by interpreting
1470                  * incoming ELS' and unsolicited status). It just crosses my
1471                  * mind that one should be able to cross-check by means of
1472                  * another GID_PN straight after a port has been opened.
1473                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
1474                  */
1475                 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
1476                 if (req->qtcb->bottom.support.els1_length >=
1477                     FSF_PLOGI_MIN_LEN)
1478                                 zfcp_fc_plogi_evaluate(port, plogi);
1479                 break;
1480         case FSF_UNKNOWN_OP_SUBTYPE:
1481                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1482                 break;
1483         }
1484
1485 out:
1486         put_device(&port->dev);
1487 }
1488
1489 /**
1490  * zfcp_fsf_open_port - create and send open port request
1491  * @erp_action: pointer to struct zfcp_erp_action
1492  * Returns: 0 on success, error otherwise
1493  */
1494 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1495 {
1496         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1497         struct zfcp_port *port = erp_action->port;
1498         struct zfcp_fsf_req *req;
1499         int retval = -EIO;
1500
1501         spin_lock_irq(&qdio->req_q_lock);
1502         if (zfcp_qdio_sbal_get(qdio))
1503                 goto out;
1504
1505         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1506                                   SBAL_SFLAGS0_TYPE_READ,
1507                                   qdio->adapter->pool.erp_req);
1508
1509         if (IS_ERR(req)) {
1510                 retval = PTR_ERR(req);
1511                 goto out;
1512         }
1513
1514         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1515         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1516
1517         req->handler = zfcp_fsf_open_port_handler;
1518         hton24(req->qtcb->bottom.support.d_id, port->d_id);
1519         req->data = port;
1520         req->erp_action = erp_action;
1521         erp_action->fsf_req_id = req->req_id;
1522         get_device(&port->dev);
1523
1524         zfcp_fsf_start_erp_timer(req);
1525         retval = zfcp_fsf_req_send(req);
1526         if (retval) {
1527                 zfcp_fsf_req_free(req);
1528                 erp_action->fsf_req_id = 0;
1529                 put_device(&port->dev);
1530         }
1531         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1532 out:
1533         spin_unlock_irq(&qdio->req_q_lock);
1534         return retval;
1535 }
1536
1537 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1538 {
1539         struct zfcp_port *port = req->data;
1540
1541         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1542                 return;
1543
1544         switch (req->qtcb->header.fsf_status) {
1545         case FSF_PORT_HANDLE_NOT_VALID:
1546                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1");
1547                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1548                 break;
1549         case FSF_ADAPTER_STATUS_AVAILABLE:
1550                 break;
1551         case FSF_GOOD:
1552                 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN);
1553                 break;
1554         }
1555 }
1556
1557 /**
1558  * zfcp_fsf_close_port - create and send close port request
1559  * @erp_action: pointer to struct zfcp_erp_action
1560  * Returns: 0 on success, error otherwise
1561  */
1562 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1563 {
1564         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1565         struct zfcp_fsf_req *req;
1566         int retval = -EIO;
1567
1568         spin_lock_irq(&qdio->req_q_lock);
1569         if (zfcp_qdio_sbal_get(qdio))
1570                 goto out;
1571
1572         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1573                                   SBAL_SFLAGS0_TYPE_READ,
1574                                   qdio->adapter->pool.erp_req);
1575
1576         if (IS_ERR(req)) {
1577                 retval = PTR_ERR(req);
1578                 goto out;
1579         }
1580
1581         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1582         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1583
1584         req->handler = zfcp_fsf_close_port_handler;
1585         req->data = erp_action->port;
1586         req->erp_action = erp_action;
1587         req->qtcb->header.port_handle = erp_action->port->handle;
1588         erp_action->fsf_req_id = req->req_id;
1589
1590         zfcp_fsf_start_erp_timer(req);
1591         retval = zfcp_fsf_req_send(req);
1592         if (retval) {
1593                 zfcp_fsf_req_free(req);
1594                 erp_action->fsf_req_id = 0;
1595         }
1596         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1597 out:
1598         spin_unlock_irq(&qdio->req_q_lock);
1599         return retval;
1600 }
1601
1602 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1603 {
1604         struct zfcp_fc_wka_port *wka_port = req->data;
1605         struct fsf_qtcb_header *header = &req->qtcb->header;
1606
1607         if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1608                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1609                 goto out;
1610         }
1611
1612         switch (header->fsf_status) {
1613         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1614                 dev_warn(&req->adapter->ccw_device->dev,
1615                          "Opening WKA port 0x%x failed\n", wka_port->d_id);
1616                 /* fall through */
1617         case FSF_ADAPTER_STATUS_AVAILABLE:
1618                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1619                 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1620                 break;
1621         case FSF_GOOD:
1622                 wka_port->handle = header->port_handle;
1623                 /* fall through */
1624         case FSF_PORT_ALREADY_OPEN:
1625                 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
1626         }
1627 out:
1628         wake_up(&wka_port->completion_wq);
1629 }
1630
1631 /**
1632  * zfcp_fsf_open_wka_port - create and send open wka-port request
1633  * @wka_port: pointer to struct zfcp_fc_wka_port
1634  * Returns: 0 on success, error otherwise
1635  */
1636 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
1637 {
1638         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1639         struct zfcp_fsf_req *req;
1640         unsigned long req_id = 0;
1641         int retval = -EIO;
1642
1643         spin_lock_irq(&qdio->req_q_lock);
1644         if (zfcp_qdio_sbal_get(qdio))
1645                 goto out;
1646
1647         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1648                                   SBAL_SFLAGS0_TYPE_READ,
1649                                   qdio->adapter->pool.erp_req);
1650
1651         if (IS_ERR(req)) {
1652                 retval = PTR_ERR(req);
1653                 goto out;
1654         }
1655
1656         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1657         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1658
1659         req->handler = zfcp_fsf_open_wka_port_handler;
1660         hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
1661         req->data = wka_port;
1662
1663         req_id = req->req_id;
1664
1665         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1666         retval = zfcp_fsf_req_send(req);
1667         if (retval)
1668                 zfcp_fsf_req_free(req);
1669         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1670 out:
1671         spin_unlock_irq(&qdio->req_q_lock);
1672         if (!retval)
1673                 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req_id);
1674         return retval;
1675 }
1676
1677 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1678 {
1679         struct zfcp_fc_wka_port *wka_port = req->data;
1680
1681         if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1682                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1683                 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1");
1684         }
1685
1686         wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
1687         wake_up(&wka_port->completion_wq);
1688 }
1689
1690 /**
1691  * zfcp_fsf_close_wka_port - create and send close wka port request
1692  * @wka_port: WKA port to open
1693  * Returns: 0 on success, error otherwise
1694  */
1695 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
1696 {
1697         struct zfcp_qdio *qdio = wka_port->adapter->qdio;
1698         struct zfcp_fsf_req *req;
1699         unsigned long req_id = 0;
1700         int retval = -EIO;
1701
1702         spin_lock_irq(&qdio->req_q_lock);
1703         if (zfcp_qdio_sbal_get(qdio))
1704                 goto out;
1705
1706         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1707                                   SBAL_SFLAGS0_TYPE_READ,
1708                                   qdio->adapter->pool.erp_req);
1709
1710         if (IS_ERR(req)) {
1711                 retval = PTR_ERR(req);
1712                 goto out;
1713         }
1714
1715         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1716         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1717
1718         req->handler = zfcp_fsf_close_wka_port_handler;
1719         req->data = wka_port;
1720         req->qtcb->header.port_handle = wka_port->handle;
1721
1722         req_id = req->req_id;
1723
1724         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1725         retval = zfcp_fsf_req_send(req);
1726         if (retval)
1727                 zfcp_fsf_req_free(req);
1728         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1729 out:
1730         spin_unlock_irq(&qdio->req_q_lock);
1731         if (!retval)
1732                 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req_id);
1733         return retval;
1734 }
1735
1736 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1737 {
1738         struct zfcp_port *port = req->data;
1739         struct fsf_qtcb_header *header = &req->qtcb->header;
1740         struct scsi_device *sdev;
1741
1742         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1743                 return;
1744
1745         switch (header->fsf_status) {
1746         case FSF_PORT_HANDLE_NOT_VALID:
1747                 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1");
1748                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1749                 break;
1750         case FSF_PORT_BOXED:
1751                 /* can't use generic zfcp_erp_modify_port_status because
1752                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1753                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1754                 shost_for_each_device(sdev, port->adapter->scsi_host)
1755                         if (sdev_to_zfcp(sdev)->port == port)
1756                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1757                                                   &sdev_to_zfcp(sdev)->status);
1758                 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED);
1759                 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
1760                                      "fscpph2");
1761                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1762                 break;
1763         case FSF_ADAPTER_STATUS_AVAILABLE:
1764                 switch (header->fsf_status_qual.word[0]) {
1765                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1766                         /* fall through */
1767                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1768                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1769                         break;
1770                 }
1771                 break;
1772         case FSF_GOOD:
1773                 /* can't use generic zfcp_erp_modify_port_status because
1774                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1775                  */
1776                 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1777                 shost_for_each_device(sdev, port->adapter->scsi_host)
1778                         if (sdev_to_zfcp(sdev)->port == port)
1779                                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN,
1780                                                   &sdev_to_zfcp(sdev)->status);
1781                 break;
1782         }
1783 }
1784
1785 /**
1786  * zfcp_fsf_close_physical_port - close physical port
1787  * @erp_action: pointer to struct zfcp_erp_action
1788  * Returns: 0 on success
1789  */
1790 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1791 {
1792         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
1793         struct zfcp_fsf_req *req;
1794         int retval = -EIO;
1795
1796         spin_lock_irq(&qdio->req_q_lock);
1797         if (zfcp_qdio_sbal_get(qdio))
1798                 goto out;
1799
1800         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1801                                   SBAL_SFLAGS0_TYPE_READ,
1802                                   qdio->adapter->pool.erp_req);
1803
1804         if (IS_ERR(req)) {
1805                 retval = PTR_ERR(req);
1806                 goto out;
1807         }
1808
1809         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1810         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1811
1812         req->data = erp_action->port;
1813         req->qtcb->header.port_handle = erp_action->port->handle;
1814         req->erp_action = erp_action;
1815         req->handler = zfcp_fsf_close_physical_port_handler;
1816         erp_action->fsf_req_id = req->req_id;
1817
1818         zfcp_fsf_start_erp_timer(req);
1819         retval = zfcp_fsf_req_send(req);
1820         if (retval) {
1821                 zfcp_fsf_req_free(req);
1822                 erp_action->fsf_req_id = 0;
1823         }
1824         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1825 out:
1826         spin_unlock_irq(&qdio->req_q_lock);
1827         return retval;
1828 }
1829
1830 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req)
1831 {
1832         struct zfcp_adapter *adapter = req->adapter;
1833         struct scsi_device *sdev = req->data;
1834         struct zfcp_scsi_dev *zfcp_sdev;
1835         struct fsf_qtcb_header *header = &req->qtcb->header;
1836         union fsf_status_qual *qual = &header->fsf_status_qual;
1837
1838         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1839                 return;
1840
1841         zfcp_sdev = sdev_to_zfcp(sdev);
1842
1843         atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1844                           ZFCP_STATUS_COMMON_ACCESS_BOXED,
1845                           &zfcp_sdev->status);
1846
1847         switch (header->fsf_status) {
1848
1849         case FSF_PORT_HANDLE_NOT_VALID:
1850                 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1");
1851                 /* fall through */
1852         case FSF_LUN_ALREADY_OPEN:
1853                 break;
1854         case FSF_PORT_BOXED:
1855                 zfcp_erp_set_port_status(zfcp_sdev->port,
1856                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1857                 zfcp_erp_port_reopen(zfcp_sdev->port,
1858                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2");
1859                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1860                 break;
1861         case FSF_LUN_SHARING_VIOLATION:
1862                 if (qual->word[0])
1863                         dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev,
1864                                  "LUN 0x%016Lx on port 0x%016Lx is already in "
1865                                  "use by CSS%d, MIF Image ID %x\n",
1866                                  zfcp_scsi_dev_lun(sdev),
1867                                  (unsigned long long)zfcp_sdev->port->wwpn,
1868                                  qual->fsf_queue_designator.cssid,
1869                                  qual->fsf_queue_designator.hla);
1870                 zfcp_erp_set_lun_status(sdev,
1871                                         ZFCP_STATUS_COMMON_ERP_FAILED |
1872                                         ZFCP_STATUS_COMMON_ACCESS_DENIED);
1873                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1874                 break;
1875         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
1876                 dev_warn(&adapter->ccw_device->dev,
1877                          "No handle is available for LUN "
1878                          "0x%016Lx on port 0x%016Lx\n",
1879                          (unsigned long long)zfcp_scsi_dev_lun(sdev),
1880                          (unsigned long long)zfcp_sdev->port->wwpn);
1881                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED);
1882                 /* fall through */
1883         case FSF_INVALID_COMMAND_OPTION:
1884                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1885                 break;
1886         case FSF_ADAPTER_STATUS_AVAILABLE:
1887                 switch (header->fsf_status_qual.word[0]) {
1888                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1889                         zfcp_fc_test_link(zfcp_sdev->port);
1890                         /* fall through */
1891                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1892                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1893                         break;
1894                 }
1895                 break;
1896
1897         case FSF_GOOD:
1898                 zfcp_sdev->lun_handle = header->lun_handle;
1899                 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1900                 break;
1901         }
1902 }
1903
1904 /**
1905  * zfcp_fsf_open_lun - open LUN
1906  * @erp_action: pointer to struct zfcp_erp_action
1907  * Returns: 0 on success, error otherwise
1908  */
1909 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action)
1910 {
1911         struct zfcp_adapter *adapter = erp_action->adapter;
1912         struct zfcp_qdio *qdio = adapter->qdio;
1913         struct zfcp_fsf_req *req;
1914         int retval = -EIO;
1915
1916         spin_lock_irq(&qdio->req_q_lock);
1917         if (zfcp_qdio_sbal_get(qdio))
1918                 goto out;
1919
1920         req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
1921                                   SBAL_SFLAGS0_TYPE_READ,
1922                                   adapter->pool.erp_req);
1923
1924         if (IS_ERR(req)) {
1925                 retval = PTR_ERR(req);
1926                 goto out;
1927         }
1928
1929         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1930         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
1931
1932         req->qtcb->header.port_handle = erp_action->port->handle;
1933         req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev);
1934         req->handler = zfcp_fsf_open_lun_handler;
1935         req->data = erp_action->sdev;
1936         req->erp_action = erp_action;
1937         erp_action->fsf_req_id = req->req_id;
1938
1939         if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1940                 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1941
1942         zfcp_fsf_start_erp_timer(req);
1943         retval = zfcp_fsf_req_send(req);
1944         if (retval) {
1945                 zfcp_fsf_req_free(req);
1946                 erp_action->fsf_req_id = 0;
1947         }
1948         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
1949 out:
1950         spin_unlock_irq(&qdio->req_q_lock);
1951         return retval;
1952 }
1953
1954 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req)
1955 {
1956         struct scsi_device *sdev = req->data;
1957         struct zfcp_scsi_dev *zfcp_sdev;
1958
1959         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1960                 return;
1961
1962         zfcp_sdev = sdev_to_zfcp(sdev);
1963
1964         switch (req->qtcb->header.fsf_status) {
1965         case FSF_PORT_HANDLE_NOT_VALID:
1966                 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1");
1967                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1968                 break;
1969         case FSF_LUN_HANDLE_NOT_VALID:
1970                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2");
1971                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1972                 break;
1973         case FSF_PORT_BOXED:
1974                 zfcp_erp_set_port_status(zfcp_sdev->port,
1975                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
1976                 zfcp_erp_port_reopen(zfcp_sdev->port,
1977                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3");
1978                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1979                 break;
1980         case FSF_ADAPTER_STATUS_AVAILABLE:
1981                 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1982                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1983                         zfcp_fc_test_link(zfcp_sdev->port);
1984                         /* fall through */
1985                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1986                         req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1987                         break;
1988                 }
1989                 break;
1990         case FSF_GOOD:
1991                 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status);
1992                 break;
1993         }
1994 }
1995
1996 /**
1997  * zfcp_fsf_close_LUN - close LUN
1998  * @erp_action: pointer to erp_action triggering the "close LUN"
1999  * Returns: 0 on success, error otherwise
2000  */
2001 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action)
2002 {
2003         struct zfcp_qdio *qdio = erp_action->adapter->qdio;
2004         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
2005         struct zfcp_fsf_req *req;
2006         int retval = -EIO;
2007
2008         spin_lock_irq(&qdio->req_q_lock);
2009         if (zfcp_qdio_sbal_get(qdio))
2010                 goto out;
2011
2012         req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2013                                   SBAL_SFLAGS0_TYPE_READ,
2014                                   qdio->adapter->pool.erp_req);
2015
2016         if (IS_ERR(req)) {
2017                 retval = PTR_ERR(req);
2018                 goto out;
2019         }
2020
2021         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2022         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2023
2024         req->qtcb->header.port_handle = erp_action->port->handle;
2025         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2026         req->handler = zfcp_fsf_close_lun_handler;
2027         req->data = erp_action->sdev;
2028         req->erp_action = erp_action;
2029         erp_action->fsf_req_id = req->req_id;
2030
2031         zfcp_fsf_start_erp_timer(req);
2032         retval = zfcp_fsf_req_send(req);
2033         if (retval) {
2034                 zfcp_fsf_req_free(req);
2035                 erp_action->fsf_req_id = 0;
2036         }
2037         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2038 out:
2039         spin_unlock_irq(&qdio->req_q_lock);
2040         return retval;
2041 }
2042
2043 static void zfcp_fsf_update_lat(struct zfcp_latency_record *lat_rec, u32 lat)
2044 {
2045         lat_rec->sum += lat;
2046         lat_rec->min = min(lat_rec->min, lat);
2047         lat_rec->max = max(lat_rec->max, lat);
2048 }
2049
2050 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
2051 {
2052         struct fsf_qual_latency_info *lat_in;
2053         struct zfcp_latency_cont *lat = NULL;
2054         struct zfcp_scsi_dev *zfcp_sdev;
2055         struct zfcp_blk_drv_data blktrc;
2056         int ticks = req->adapter->timer_ticks;
2057
2058         lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
2059
2060         blktrc.flags = 0;
2061         blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2062         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2063                 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2064         blktrc.inb_usage = 0;
2065         blktrc.outb_usage = req->qdio_req.qdio_outb_usage;
2066
2067         if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA &&
2068             !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2069                 zfcp_sdev = sdev_to_zfcp(scsi->device);
2070                 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2071                 blktrc.channel_lat = lat_in->channel_lat * ticks;
2072                 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2073
2074                 switch (req->qtcb->bottom.io.data_direction) {
2075                 case FSF_DATADIR_DIF_READ_STRIP:
2076                 case FSF_DATADIR_DIF_READ_CONVERT:
2077                 case FSF_DATADIR_READ:
2078                         lat = &zfcp_sdev->latencies.read;
2079                         break;
2080                 case FSF_DATADIR_DIF_WRITE_INSERT:
2081                 case FSF_DATADIR_DIF_WRITE_CONVERT:
2082                 case FSF_DATADIR_WRITE:
2083                         lat = &zfcp_sdev->latencies.write;
2084                         break;
2085                 case FSF_DATADIR_CMND:
2086                         lat = &zfcp_sdev->latencies.cmd;
2087                         break;
2088                 }
2089
2090                 if (lat) {
2091                         spin_lock(&zfcp_sdev->latencies.lock);
2092                         zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2093                         zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2094                         lat->counter++;
2095                         spin_unlock(&zfcp_sdev->latencies.lock);
2096                 }
2097         }
2098
2099         blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2100                             sizeof(blktrc));
2101 }
2102
2103 /**
2104  * zfcp_fsf_fcp_handler_common() - FCP response handler common to I/O and TMF.
2105  * @req: Pointer to FSF request.
2106  * @sdev: Pointer to SCSI device as request context.
2107  */
2108 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req,
2109                                         struct scsi_device *sdev)
2110 {
2111         struct zfcp_scsi_dev *zfcp_sdev;
2112         struct fsf_qtcb_header *header = &req->qtcb->header;
2113
2114         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
2115                 return;
2116
2117         zfcp_sdev = sdev_to_zfcp(sdev);
2118
2119         switch (header->fsf_status) {
2120         case FSF_HANDLE_MISMATCH:
2121         case FSF_PORT_HANDLE_NOT_VALID:
2122                 zfcp_erp_adapter_reopen(req->adapter, 0, "fssfch1");
2123                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2124                 break;
2125         case FSF_FCPLUN_NOT_VALID:
2126         case FSF_LUN_HANDLE_NOT_VALID:
2127                 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2");
2128                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2129                 break;
2130         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2131                 zfcp_fsf_class_not_supp(req);
2132                 break;
2133         case FSF_DIRECTION_INDICATOR_NOT_VALID:
2134                 dev_err(&req->adapter->ccw_device->dev,
2135                         "Incorrect direction %d, LUN 0x%016Lx on port "
2136                         "0x%016Lx closed\n",
2137                         req->qtcb->bottom.io.data_direction,
2138                         (unsigned long long)zfcp_scsi_dev_lun(sdev),
2139                         (unsigned long long)zfcp_sdev->port->wwpn);
2140                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch3");
2141                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2142                 break;
2143         case FSF_CMND_LENGTH_NOT_VALID:
2144                 dev_err(&req->adapter->ccw_device->dev,
2145                         "Incorrect FCP_CMND length %d, FCP device closed\n",
2146                         req->qtcb->bottom.io.fcp_cmnd_length);
2147                 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch4");
2148                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2149                 break;
2150         case FSF_PORT_BOXED:
2151                 zfcp_erp_set_port_status(zfcp_sdev->port,
2152                                          ZFCP_STATUS_COMMON_ACCESS_BOXED);
2153                 zfcp_erp_port_reopen(zfcp_sdev->port,
2154                                      ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5");
2155                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2156                 break;
2157         case FSF_LUN_BOXED:
2158                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED);
2159                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
2160                                     "fssfch6");
2161                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2162                 break;
2163         case FSF_ADAPTER_STATUS_AVAILABLE:
2164                 if (header->fsf_status_qual.word[0] ==
2165                     FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2166                         zfcp_fc_test_link(zfcp_sdev->port);
2167                 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2168                 break;
2169         }
2170 }
2171
2172 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
2173 {
2174         struct scsi_cmnd *scpnt;
2175         struct fcp_resp_with_ext *fcp_rsp;
2176         unsigned long flags;
2177
2178         read_lock_irqsave(&req->adapter->abort_lock, flags);
2179
2180         scpnt = req->data;
2181         if (unlikely(!scpnt)) {
2182                 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2183                 return;
2184         }
2185
2186         zfcp_fsf_fcp_handler_common(req, scpnt->device);
2187
2188         if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2189                 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
2190                 goto skip_fsfstatus;
2191         }
2192
2193         switch (req->qtcb->header.fsf_status) {
2194         case FSF_INCONSISTENT_PROT_DATA:
2195         case FSF_INVALID_PROT_PARM:
2196                 set_host_byte(scpnt, DID_ERROR);
2197                 goto skip_fsfstatus;
2198         case FSF_BLOCK_GUARD_CHECK_FAILURE:
2199                 zfcp_scsi_dif_sense_error(scpnt, 0x1);
2200                 goto skip_fsfstatus;
2201         case FSF_APP_TAG_CHECK_FAILURE:
2202                 zfcp_scsi_dif_sense_error(scpnt, 0x2);
2203                 goto skip_fsfstatus;
2204         case FSF_REF_TAG_CHECK_FAILURE:
2205                 zfcp_scsi_dif_sense_error(scpnt, 0x3);
2206                 goto skip_fsfstatus;
2207         }
2208         BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE);
2209         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2210         zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
2211
2212 skip_fsfstatus:
2213         zfcp_fsf_req_trace(req, scpnt);
2214         zfcp_dbf_scsi_result(scpnt, req);
2215
2216         scpnt->host_scribble = NULL;
2217         (scpnt->scsi_done) (scpnt);
2218         /*
2219          * We must hold this lock until scsi_done has been called.
2220          * Otherwise we may call scsi_done after abort regarding this
2221          * command has completed.
2222          * Note: scsi_done must not block!
2223          */
2224         read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2225 }
2226
2227 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
2228 {
2229         switch (scsi_get_prot_op(scsi_cmnd)) {
2230         case SCSI_PROT_NORMAL:
2231                 switch (scsi_cmnd->sc_data_direction) {
2232                 case DMA_NONE:
2233                         *data_dir = FSF_DATADIR_CMND;
2234                         break;
2235                 case DMA_FROM_DEVICE:
2236                         *data_dir = FSF_DATADIR_READ;
2237                         break;
2238                 case DMA_TO_DEVICE:
2239                         *data_dir = FSF_DATADIR_WRITE;
2240                         break;
2241                 case DMA_BIDIRECTIONAL:
2242                         return -EINVAL;
2243                 }
2244                 break;
2245
2246         case SCSI_PROT_READ_STRIP:
2247                 *data_dir = FSF_DATADIR_DIF_READ_STRIP;
2248                 break;
2249         case SCSI_PROT_WRITE_INSERT:
2250                 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT;
2251                 break;
2252         case SCSI_PROT_READ_PASS:
2253                 *data_dir = FSF_DATADIR_DIF_READ_CONVERT;
2254                 break;
2255         case SCSI_PROT_WRITE_PASS:
2256                 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT;
2257                 break;
2258         default:
2259                 return -EINVAL;
2260         }
2261
2262         return 0;
2263 }
2264
2265 /**
2266  * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command)
2267  * @scsi_cmnd: scsi command to be sent
2268  */
2269 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
2270 {
2271         struct zfcp_fsf_req *req;
2272         struct fcp_cmnd *fcp_cmnd;
2273         u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
2274         int retval = -EIO;
2275         struct scsi_device *sdev = scsi_cmnd->device;
2276         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2277         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
2278         struct zfcp_qdio *qdio = adapter->qdio;
2279         struct fsf_qtcb_bottom_io *io;
2280         unsigned long flags;
2281
2282         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2283                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2284                 return -EBUSY;
2285
2286         spin_lock_irqsave(&qdio->req_q_lock, flags);
2287         if (atomic_read(&qdio->req_q_free) <= 0) {
2288                 atomic_inc(&qdio->req_q_full);
2289                 goto out;
2290         }
2291
2292         if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE)
2293                 sbtype = SBAL_SFLAGS0_TYPE_WRITE;
2294
2295         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2296                                   sbtype, adapter->pool.scsi_req);
2297
2298         if (IS_ERR(req)) {
2299                 retval = PTR_ERR(req);
2300                 goto out;
2301         }
2302
2303         scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2304
2305         io = &req->qtcb->bottom.io;
2306         req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
2307         req->data = scsi_cmnd;
2308         req->handler = zfcp_fsf_fcp_cmnd_handler;
2309         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2310         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2311         io->service_class = FSF_CLASS_3;
2312         io->fcp_cmnd_length = FCP_CMND_LEN;
2313
2314         if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) {
2315                 io->data_block_length = scsi_cmnd->device->sector_size;
2316                 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF;
2317         }
2318
2319         if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction))
2320                 goto failed_scsi_cmnd;
2321
2322         BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE);
2323         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2324         zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
2325
2326         if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) &&
2327             scsi_prot_sg_count(scsi_cmnd)) {
2328                 zfcp_qdio_set_data_div(qdio, &req->qdio_req,
2329                                        scsi_prot_sg_count(scsi_cmnd));
2330                 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2331                                                  scsi_prot_sglist(scsi_cmnd));
2332                 if (retval)
2333                         goto failed_scsi_cmnd;
2334                 io->prot_data_length = zfcp_qdio_real_bytes(
2335                                                 scsi_prot_sglist(scsi_cmnd));
2336         }
2337
2338         retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
2339                                          scsi_sglist(scsi_cmnd));
2340         if (unlikely(retval))
2341                 goto failed_scsi_cmnd;
2342
2343         zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
2344         if (zfcp_adapter_multi_buffer_active(adapter))
2345                 zfcp_qdio_set_scount(qdio, &req->qdio_req);
2346
2347         retval = zfcp_fsf_req_send(req);
2348         if (unlikely(retval))
2349                 goto failed_scsi_cmnd;
2350         /* NOTE: DO NOT TOUCH req PAST THIS POINT! */
2351
2352         goto out;
2353
2354 failed_scsi_cmnd:
2355         zfcp_fsf_req_free(req);
2356         scsi_cmnd->host_scribble = NULL;
2357 out:
2358         spin_unlock_irqrestore(&qdio->req_q_lock, flags);
2359         return retval;
2360 }
2361
2362 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
2363 {
2364         struct scsi_device *sdev = req->data;
2365         struct fcp_resp_with_ext *fcp_rsp;
2366         struct fcp_resp_rsp_info *rsp_info;
2367
2368         zfcp_fsf_fcp_handler_common(req, sdev);
2369
2370         fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu;
2371         rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2372
2373         if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
2374              (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2375                 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2376 }
2377
2378 /**
2379  * zfcp_fsf_fcp_task_mgmt() - Send SCSI task management command (TMF).
2380  * @sdev: Pointer to SCSI device to send the task management command to.
2381  * @tm_flags: Unsigned byte for task management flags.
2382  *
2383  * Return: On success pointer to struct zfcp_fsf_req, %NULL otherwise.
2384  */
2385 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_device *sdev,
2386                                             u8 tm_flags)
2387 {
2388         struct zfcp_fsf_req *req = NULL;
2389         struct fcp_cmnd *fcp_cmnd;
2390         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
2391         struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio;
2392
2393         if (unlikely(!(atomic_read(&zfcp_sdev->status) &
2394                        ZFCP_STATUS_COMMON_UNBLOCKED)))
2395                 return NULL;
2396
2397         spin_lock_irq(&qdio->req_q_lock);
2398         if (zfcp_qdio_sbal_get(qdio))
2399                 goto out;
2400
2401         req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2402                                   SBAL_SFLAGS0_TYPE_WRITE,
2403                                   qdio->adapter->pool.scsi_req);
2404
2405         if (IS_ERR(req)) {
2406                 req = NULL;
2407                 goto out;
2408         }
2409
2410         req->data = sdev;
2411
2412         req->handler = zfcp_fsf_fcp_task_mgmt_handler;
2413         req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
2414         req->qtcb->header.port_handle = zfcp_sdev->port->handle;
2415         req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2416         req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2417         req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
2418
2419         zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
2420
2421         fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu;
2422         zfcp_fc_fcp_tm(fcp_cmnd, sdev, tm_flags);
2423
2424         zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT);
2425         if (!zfcp_fsf_req_send(req)) {
2426                 /* NOTE: DO NOT TOUCH req, UNTIL IT COMPLETES! */
2427                 goto out;
2428         }
2429
2430         zfcp_fsf_req_free(req);
2431         req = NULL;
2432 out:
2433         spin_unlock_irq(&qdio->req_q_lock);
2434         return req;
2435 }
2436
2437 /**
2438  * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2439  * @qdio: pointer to struct zfcp_qdio
2440  * @sbal_idx: response queue index of SBAL to be processed
2441  */
2442 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
2443 {
2444         struct zfcp_adapter *adapter = qdio->adapter;
2445         struct qdio_buffer *sbal = qdio->res_q[sbal_idx];
2446         struct qdio_buffer_element *sbale;
2447         struct zfcp_fsf_req *fsf_req;
2448         unsigned long req_id;
2449         int idx;
2450
2451         for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2452
2453                 sbale = &sbal->element[idx];
2454                 req_id = (unsigned long) sbale->addr;
2455                 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id);
2456
2457                 if (!fsf_req) {
2458                         /*
2459                          * Unknown request means that we have potentially memory
2460                          * corruption and must stop the machine immediately.
2461                          */
2462                         zfcp_qdio_siosl(adapter);
2463                         panic("error: unknown req_id (%lx) on adapter %s.\n",
2464                               req_id, dev_name(&adapter->ccw_device->dev));
2465                 }
2466
2467                 zfcp_fsf_req_complete(fsf_req);
2468
2469                 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY))
2470                         break;
2471         }
2472 }