drivers/s390/scsi/zfcp_fsf.c

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