git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/lpfc/lpfc_vport.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2008 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/delay.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/idr.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/kthread.h>
  28 #include <linux/pci.h>
  29 #include <linux/spinlock.h>
  30
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_host.h>
  34 #include <scsi/scsi_transport_fc.h>
  35 #include "lpfc_hw.h"
  36 #include "lpfc_sli.h"
  37 #include "lpfc_nl.h"
  38 #include "lpfc_disc.h"
  39 #include "lpfc_scsi.h"
  40 #include "lpfc.h"
  41 #include "lpfc_logmsg.h"
  42 #include "lpfc_crtn.h"
  43 #include "lpfc_version.h"
  44 #include "lpfc_vport.h"
  45
  46 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
  47                                  enum fc_vport_state new_state)
  48 {
  49         struct fc_vport *fc_vport = vport->fc_vport;
  50
  51         if (fc_vport) {
  52                 /*
  53                  * When the transport defines fc_vport_set state we will replace
  54                  * this code with the following line
  55                  */
  56                 /* fc_vport_set_state(fc_vport, new_state); */
  57                 if (new_state != FC_VPORT_INITIALIZING)
  58                         fc_vport->vport_last_state = fc_vport->vport_state;
  59                 fc_vport->vport_state = new_state;
  60         }
  61
  62         /* for all the error states we will set the invternal state to FAILED */
  63         switch (new_state) {
  64         case FC_VPORT_NO_FABRIC_SUPP:
  65         case FC_VPORT_NO_FABRIC_RSCS:
  66         case FC_VPORT_FABRIC_LOGOUT:
  67         case FC_VPORT_FABRIC_REJ_WWN:
  68         case FC_VPORT_FAILED:
  69                 vport->port_state = LPFC_VPORT_FAILED;
  70                 break;
  71         case FC_VPORT_LINKDOWN:
  72                 vport->port_state = LPFC_VPORT_UNKNOWN;
  73                 break;
  74         default:
  75                 /* do nothing */
  76                 break;
  77         }
  78 }
  79
  80 static int
  81 lpfc_alloc_vpi(struct lpfc_hba *phba)
  82 {
  83         int  vpi;
  84
  85         spin_lock_irq(&phba->hbalock);
  86         /* Start at bit 1 because vpi zero is reserved for the physical port */
  87         vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
  88         if (vpi > phba->max_vpi)
  89                 vpi = 0;
  90         else
  91                 set_bit(vpi, phba->vpi_bmask);
  92         spin_unlock_irq(&phba->hbalock);
  93         return vpi;
  94 }
  95
  96 static void
  97 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
  98 {
  99         spin_lock_irq(&phba->hbalock);
 100         clear_bit(vpi, phba->vpi_bmask);
 101         spin_unlock_irq(&phba->hbalock);
 102 }
 103
 104 static int
 105 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
 106 {
 107         LPFC_MBOXQ_t *pmb;
 108         MAILBOX_t *mb;
 109         struct lpfc_dmabuf *mp;
 110         int  rc;
 111
 112         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 113         if (!pmb) {
 114                 return -ENOMEM;
 115         }
 116         mb = &pmb->mb;
 117
 118         lpfc_read_sparam(phba, pmb, vport->vpi);
 119         /*
 120          * Grab buffer pointer and clear context1 so we can use
 121          * lpfc_sli_issue_box_wait
 122          */
 123         mp = (struct lpfc_dmabuf *) pmb->context1;
 124         pmb->context1 = NULL;
 125
 126         pmb->vport = vport;
 127         rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
 128         if (rc != MBX_SUCCESS) {
 129                 if (signal_pending(current)) {
 130                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 131                                          "1830 Signal aborted mbxCmd x%x\n",
 132                                          mb->mbxCommand);
 133                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 134                         kfree(mp);
 135                         if (rc != MBX_TIMEOUT)
 136                                 mempool_free(pmb, phba->mbox_mem_pool);
 137                         return -EINTR;
 138                 } else {
 139                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 140                                          "1818 VPort failed init, mbxCmd x%x "
 141                                          "READ_SPARM mbxStatus x%x, rc = x%x\n",
 142                                          mb->mbxCommand, mb->mbxStatus, rc);
 143                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 144                         kfree(mp);
 145                         if (rc != MBX_TIMEOUT)
 146                                 mempool_free(pmb, phba->mbox_mem_pool);
 147                         return -EIO;
 148                 }
 149         }
 150
 151         memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
 152         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 153                sizeof (struct lpfc_name));
 154         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 155                sizeof (struct lpfc_name));
 156
 157         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 158         kfree(mp);
 159         mempool_free(pmb, phba->mbox_mem_pool);
 160
 161         return 0;
 162 }
 163
 164 static int
 165 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
 166                       const char *name_type)
 167 {
 168                                 /* ensure that IEEE format 1 addresses
 169                                  * contain zeros in bits 59-48
 170                                  */
 171         if (!((wwn->u.wwn[0] >> 4) == 1 &&
 172               ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
 173                 return 1;
 174
 175         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 176                         "1822 Invalid %s: %02x:%02x:%02x:%02x:"
 177                         "%02x:%02x:%02x:%02x\n",
 178                         name_type,
 179                         wwn->u.wwn[0], wwn->u.wwn[1],
 180                         wwn->u.wwn[2], wwn->u.wwn[3],
 181                         wwn->u.wwn[4], wwn->u.wwn[5],
 182                         wwn->u.wwn[6], wwn->u.wwn[7]);
 183         return 0;
 184 }
 185
 186 static int
 187 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
 188 {
 189         struct lpfc_vport *vport;
 190         unsigned long flags;
 191
 192         spin_lock_irqsave(&phba->hbalock, flags);
 193         list_for_each_entry(vport, &phba->port_list, listentry) {
 194                 if (vport == new_vport)
 195                         continue;
 196                 /* If they match, return not unique */
 197                 if (memcmp(&vport->fc_sparam.portName,
 198                            &new_vport->fc_sparam.portName,
 199                            sizeof(struct lpfc_name)) == 0) {
 200                         spin_unlock_irqrestore(&phba->hbalock, flags);
 201                         return 0;
 202                 }
 203         }
 204         spin_unlock_irqrestore(&phba->hbalock, flags);
 205         return 1;
 206 }
 207
 208 /**
 209  * lpfc_discovery_wait: Wait for driver discovery to quiesce.
 210  * @vport: The virtual port for which this call is being executed.
 211  *
 212  * This driver calls this routine specifically from lpfc_vport_delete
 213  * to enforce a synchronous execution of vport
 214  * delete relative to discovery activities.  The
 215  * lpfc_vport_delete routine should not return until it
 216  * can reasonably guarantee that discovery has quiesced.
 217  * Post FDISC LOGO, the driver must wait until its SAN teardown is
 218  * complete and all resources recovered before allowing
 219  * cleanup.
 220  *
 221  * This routine does not require any locks held.
 222  **/
 223 static void lpfc_discovery_wait(struct lpfc_vport *vport)
 224 {
 225         struct lpfc_hba *phba = vport->phba;
 226         uint32_t wait_flags = 0;
 227         unsigned long wait_time_max;
 228         unsigned long start_time;
 229
 230         wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
 231                      FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
 232
 233         /*
 234          * The time constraint on this loop is a balance between the
 235          * fabric RA_TOV value and dev_loss tmo.  The driver's
 236          * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
 237          */
 238         wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
 239         wait_time_max += jiffies;
 240         start_time = jiffies;
 241         while (time_before(jiffies, wait_time_max)) {
 242                 if ((vport->num_disc_nodes > 0)    ||
 243                     (vport->fc_flag & wait_flags)  ||
 244                     ((vport->port_state > LPFC_VPORT_FAILED) &&
 245                      (vport->port_state < LPFC_VPORT_READY))) {
 246                         lpfc_printf_log(phba, KERN_INFO, LOG_VPORT,
 247                                         "1833 Vport discovery quiesce Wait:"
 248                                         " vpi x%x state x%x fc_flags x%x"
 249                                         " num_nodes x%x, waiting 1000 msecs"
 250                                         " total wait msecs x%x\n",
 251                                         vport->vpi, vport->port_state,
 252                                         vport->fc_flag, vport->num_disc_nodes,
 253                                         jiffies_to_msecs(jiffies - start_time));
 254                         msleep(1000);
 255                 } else {
 256                         /* Base case.  Wait variants satisfied.  Break out */
 257                         lpfc_printf_log(phba, KERN_INFO, LOG_VPORT,
 258                                          "1834 Vport discovery quiesced:"
 259                                          " vpi x%x state x%x fc_flags x%x"
 260                                          " wait msecs x%x\n",
 261                                          vport->vpi, vport->port_state,
 262                                          vport->fc_flag,
 263                                          jiffies_to_msecs(jiffies
 264                                                 - start_time));
 265                         break;
 266                 }
 267         }
 268
 269         if (time_after(jiffies, wait_time_max))
 270                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 271                                 "1835 Vport discovery quiesce failed:"
 272                                 " vpi x%x state x%x fc_flags x%x"
 273                                 " wait msecs x%x\n",
 274                                 vport->vpi, vport->port_state,
 275                                 vport->fc_flag,
 276                                 jiffies_to_msecs(jiffies - start_time));
 277 }
 278
 279 int
 280 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 281 {
 282         struct lpfc_nodelist *ndlp;
 283         struct Scsi_Host *shost = fc_vport->shost;
 284         struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
 285         struct lpfc_hba   *phba = pport->phba;
 286         struct lpfc_vport *vport = NULL;
 287         int instance;
 288         int vpi;
 289         int rc = VPORT_ERROR;
 290         int status;
 291
 292         if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
 293                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 294                                 "1808 Create VPORT failed: "
 295                                 "NPIV is not enabled: SLImode:%d\n",
 296                                 phba->sli_rev);
 297                 rc = VPORT_INVAL;
 298                 goto error_out;
 299         }
 300
 301         vpi = lpfc_alloc_vpi(phba);
 302         if (vpi == 0) {
 303                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 304                                 "1809 Create VPORT failed: "
 305                                 "Max VPORTs (%d) exceeded\n",
 306                                 phba->max_vpi);
 307                 rc = VPORT_NORESOURCES;
 308                 goto error_out;
 309         }
 310
 311
 312         /* Assign an unused board number */
 313         if ((instance = lpfc_get_instance()) < 0) {
 314                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 315                                 "1810 Create VPORT failed: Cannot get "
 316                                 "instance number\n");
 317                 lpfc_free_vpi(phba, vpi);
 318                 rc = VPORT_NORESOURCES;
 319                 goto error_out;
 320         }
 321
 322         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
 323         if (!vport) {
 324                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 325                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
 326                 lpfc_free_vpi(phba, vpi);
 327                 rc = VPORT_NORESOURCES;
 328                 goto error_out;
 329         }
 330
 331         vport->vpi = vpi;
 332         lpfc_debugfs_initialize(vport);
 333
 334         if ((status = lpfc_vport_sparm(phba, vport))) {
 335                 if (status == -EINTR) {
 336                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 337                                          "1831 Create VPORT Interrupted.\n");
 338                         rc = VPORT_ERROR;
 339                 } else {
 340                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 341                                          "1813 Create VPORT failed. "
 342                                          "Cannot get sparam\n");
 343                         rc = VPORT_NORESOURCES;
 344                 }
 345                 lpfc_free_vpi(phba, vpi);
 346                 destroy_port(vport);
 347                 goto error_out;
 348         }
 349
 350         memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
 351         memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
 352         if (fc_vport->node_name != 0)
 353                 u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 354         if (fc_vport->port_name != 0)
 355                 u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 356
 357         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 358         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 359
 360         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 361             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 362                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 363                                  "1821 Create VPORT failed. "
 364                                  "Invalid WWN format\n");
 365                 lpfc_free_vpi(phba, vpi);
 366                 destroy_port(vport);
 367                 rc = VPORT_INVAL;
 368                 goto error_out;
 369         }
 370
 371         if (!lpfc_unique_wwpn(phba, vport)) {
 372                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 373                                  "1823 Create VPORT failed. "
 374                                  "Duplicate WWN on HBA\n");
 375                 lpfc_free_vpi(phba, vpi);
 376                 destroy_port(vport);
 377                 rc = VPORT_INVAL;
 378                 goto error_out;
 379         }
 380
 381         /* Create binary sysfs attribute for vport */
 382         lpfc_alloc_sysfs_attr(vport);
 383
 384         *(struct lpfc_vport **)fc_vport->dd_data = vport;
 385         vport->fc_vport = fc_vport;
 386
 387         if ((phba->link_state < LPFC_LINK_UP) ||
 388             (phba->fc_topology == TOPOLOGY_LOOP)) {
 389                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 390                 rc = VPORT_OK;
 391                 goto out;
 392         }
 393
 394         if (disable) {
 395                 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 396                 rc = VPORT_OK;
 397                 goto out;
 398         }
 399
 400         /* Use the Physical nodes Fabric NDLP to determine if the link is
 401          * up and ready to FDISC.
 402          */
 403         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 404         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 405             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 406                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 407                         lpfc_set_disctmo(vport);
 408                         lpfc_initial_fdisc(vport);
 409                 } else {
 410                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 411                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 412                                          "0262 No NPIV Fabric support\n");
 413                 }
 414         } else {
 415                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 416         }
 417         rc = VPORT_OK;
 418
 419 out:
 420         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 421                         "1825 Vport Created.\n");
 422         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 423 error_out:
 424         return rc;
 425 }
 426
 427 static int
 428 disable_vport(struct fc_vport *fc_vport)
 429 {
 430         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 431         struct lpfc_hba   *phba = vport->phba;
 432         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 433         long timeout;
 434
 435         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 436         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 437             && phba->link_state >= LPFC_LINK_UP) {
 438                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 439                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 440                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 441                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 442                                 timeout = schedule_timeout(timeout);
 443         }
 444
 445         lpfc_sli_host_down(vport);
 446
 447         /* Mark all nodes for discovery so we can remove them by
 448          * calling lpfc_cleanup_rpis(vport, 1)
 449          */
 450         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 451                 if (!NLP_CHK_NODE_ACT(ndlp))
 452                         continue;
 453                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 454                         continue;
 455                 lpfc_disc_state_machine(vport, ndlp, NULL,
 456                                         NLP_EVT_DEVICE_RECOVERY);
 457         }
 458         lpfc_cleanup_rpis(vport, 1);
 459
 460         lpfc_stop_vport_timers(vport);
 461         lpfc_unreg_all_rpis(vport);
 462         lpfc_unreg_default_rpis(vport);
 463         /*
 464          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 465          * scsi_host_put() to release the vport.
 466          */
 467         lpfc_mbx_unreg_vpi(vport);
 468
 469         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 470         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 471                          "1826 Vport Disabled.\n");
 472         return VPORT_OK;
 473 }
 474
 475 static int
 476 enable_vport(struct fc_vport *fc_vport)
 477 {
 478         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 479         struct lpfc_hba   *phba = vport->phba;
 480         struct lpfc_nodelist *ndlp = NULL;
 481
 482         if ((phba->link_state < LPFC_LINK_UP) ||
 483             (phba->fc_topology == TOPOLOGY_LOOP)) {
 484                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 485                 return VPORT_OK;
 486         }
 487
 488         vport->load_flag |= FC_LOADING;
 489         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 490
 491         /* Use the Physical nodes Fabric NDLP to determine if the link is
 492          * up and ready to FDISC.
 493          */
 494         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 495         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 496             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 497                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 498                         lpfc_set_disctmo(vport);
 499                         lpfc_initial_fdisc(vport);
 500                 } else {
 501                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 502                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 503                                          "0264 No NPIV Fabric support\n");
 504                 }
 505         } else {
 506                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 507         }
 508         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 509                          "1827 Vport Enabled.\n");
 510         return VPORT_OK;
 511 }
 512
 513 int
 514 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 515 {
 516         if (disable)
 517                 return disable_vport(fc_vport);
 518         else
 519                 return enable_vport(fc_vport);
 520 }
 521
 522
 523 int
 524 lpfc_vport_delete(struct fc_vport *fc_vport)
 525 {
 526         struct lpfc_nodelist *ndlp = NULL;
 527         struct Scsi_Host *shost = (struct Scsi_Host *) fc_vport->shost;
 528         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 529         struct lpfc_hba   *phba = vport->phba;
 530         long timeout;
 531
 532         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 533                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 534                                  "1812 vport_delete failed: Cannot delete "
 535                                  "physical host\n");
 536                 return VPORT_ERROR;
 537         }
 538         /*
 539          * If we are not unloading the driver then prevent the vport_delete
 540          * from happening until after this vport's discovery is finished.
 541          */
 542         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 543                 int check_count = 0;
 544                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 545                        vport->port_state > LPFC_VPORT_FAILED &&
 546                        vport->port_state < LPFC_VPORT_READY) {
 547                         check_count++;
 548                         msleep(1000);
 549                 }
 550                 if (vport->port_state > LPFC_VPORT_FAILED &&
 551                     vport->port_state < LPFC_VPORT_READY)
 552                         return -EAGAIN;
 553         }
 554         /*
 555          * This is a bit of a mess.  We want to ensure the shost doesn't get
 556          * torn down until we're done with the embedded lpfc_vport structure.
 557          *
 558          * Beyond holding a reference for this function, we also need a
 559          * reference for outstanding I/O requests we schedule during delete
 560          * processing.  But once we scsi_remove_host() we can no longer obtain
 561          * a reference through scsi_host_get().
 562          *
 563          * So we take two references here.  We release one reference at the
 564          * bottom of the function -- after delinking the vport.  And we
 565          * release the other at the completion of the unreg_vpi that get's
 566          * initiated after we've disposed of all other resources associated
 567          * with the port.
 568          */
 569         if (!scsi_host_get(shost))
 570                 return VPORT_INVAL;
 571         if (!scsi_host_get(shost)) {
 572                 scsi_host_put(shost);
 573                 return VPORT_INVAL;
 574         }
 575         spin_lock_irq(&phba->hbalock);
 576         vport->load_flag |= FC_UNLOADING;
 577         spin_unlock_irq(&phba->hbalock);
 578
 579         lpfc_free_sysfs_attr(vport);
 580
 581         lpfc_debugfs_terminate(vport);
 582
 583         /* Remove FC host and then SCSI host with the vport */
 584         fc_remove_host(lpfc_shost_from_vport(vport));
 585         scsi_remove_host(lpfc_shost_from_vport(vport));
 586
 587         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 588
 589         /* In case of driver unload, we shall not perform fabric logo as the
 590          * worker thread already stopped at this stage and, in this case, we
 591          * can safely skip the fabric logo.
 592          */
 593         if (phba->pport->load_flag & FC_UNLOADING) {
 594                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 595                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 596                     phba->link_state >= LPFC_LINK_UP) {
 597                         /* First look for the Fabric ndlp */
 598                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 599                         if (!ndlp)
 600                                 goto skip_logo;
 601                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
 602                                 ndlp = lpfc_enable_node(vport, ndlp,
 603                                                         NLP_STE_UNUSED_NODE);
 604                                 if (!ndlp)
 605                                         goto skip_logo;
 606                         }
 607                         /* Remove ndlp from vport npld list */
 608                         lpfc_dequeue_node(vport, ndlp);
 609
 610                         /* Indicate free memory when release */
 611                         spin_lock_irq(&phba->ndlp_lock);
 612                         NLP_SET_FREE_REQ(ndlp);
 613                         spin_unlock_irq(&phba->ndlp_lock);
 614                         /* Kick off release ndlp when it can be safely done */
 615                         lpfc_nlp_put(ndlp);
 616                 }
 617                 goto skip_logo;
 618         }
 619
 620         /* Otherwise, we will perform fabric logo as needed */
 621         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 622             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 623             phba->link_state >= LPFC_LINK_UP &&
 624             phba->fc_topology != TOPOLOGY_LOOP) {
 625                 if (vport->cfg_enable_da_id) {
 626                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 627                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
 628                                 while (vport->ct_flags && timeout)
 629                                         timeout = schedule_timeout(timeout);
 630                         else
 631                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 632                                                 LOG_VPORT,
 633                                                 "1829 CT command failed to "
 634                                                 "delete objects on fabric. \n");
 635                 }
 636                 /* First look for the Fabric ndlp */
 637                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 638                 if (!ndlp) {
 639                         /* Cannot find existing Fabric ndlp, allocate one */
 640                         ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
 641                         if (!ndlp)
 642                                 goto skip_logo;
 643                         lpfc_nlp_init(vport, ndlp, Fabric_DID);
 644                         /* Indicate free memory when release */
 645                         NLP_SET_FREE_REQ(ndlp);
 646                 } else {
 647                         if (!NLP_CHK_NODE_ACT(ndlp))
 648                                 ndlp = lpfc_enable_node(vport, ndlp,
 649                                                 NLP_STE_UNUSED_NODE);
 650                                 if (!ndlp)
 651                                         goto skip_logo;
 652
 653                         /* Remove ndlp from vport npld list */
 654                         lpfc_dequeue_node(vport, ndlp);
 655                         spin_lock_irq(&phba->ndlp_lock);
 656                         if (!NLP_CHK_FREE_REQ(ndlp))
 657                                 /* Indicate free memory when release */
 658                                 NLP_SET_FREE_REQ(ndlp);
 659                         else {
 660                                 /* Skip this if ndlp is already in free mode */
 661                                 spin_unlock_irq(&phba->ndlp_lock);
 662                                 goto skip_logo;
 663                         }
 664                         spin_unlock_irq(&phba->ndlp_lock);
 665                 }
 666                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 667                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 668                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 669                         goto skip_logo;
 670                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 671                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 672                                 timeout = schedule_timeout(timeout);
 673         }
 674
 675         if (!(phba->pport->load_flag & FC_UNLOADING))
 676                 lpfc_discovery_wait(vport);
 677
 678 skip_logo:
 679         lpfc_cleanup(vport);
 680         lpfc_sli_host_down(vport);
 681
 682         lpfc_stop_vport_timers(vport);
 683
 684         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 685                 lpfc_unreg_all_rpis(vport);
 686                 lpfc_unreg_default_rpis(vport);
 687                 /*
 688                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 689                  * does the scsi_host_put() to release the vport.
 690                  */
 691                 if (lpfc_mbx_unreg_vpi(vport))
 692                         scsi_host_put(shost);
 693         } else
 694                 scsi_host_put(shost);
 695
 696         lpfc_free_vpi(phba, vport->vpi);
 697         vport->work_port_events = 0;
 698         spin_lock_irq(&phba->hbalock);
 699         list_del_init(&vport->listentry);
 700         spin_unlock_irq(&phba->hbalock);
 701         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 702                          "1828 Vport Deleted.\n");
 703         scsi_host_put(shost);
 704         return VPORT_OK;
 705 }
 706
 707 struct lpfc_vport **
 708 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 709 {
 710         struct lpfc_vport *port_iterator;
 711         struct lpfc_vport **vports;
 712         int index = 0;
 713         vports = kzalloc((phba->max_vpi + 1) * sizeof(struct lpfc_vport *),
 714                          GFP_KERNEL);
 715         if (vports == NULL)
 716                 return NULL;
 717         spin_lock_irq(&phba->hbalock);
 718         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 719                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 720                         lpfc_printf_vlog(port_iterator, KERN_WARNING, LOG_VPORT,
 721                                          "1801 Create vport work array FAILED: "
 722                                          "cannot do scsi_host_get\n");
 723                         continue;
 724                 }
 725                 vports[index++] = port_iterator;
 726         }
 727         spin_unlock_irq(&phba->hbalock);
 728         return vports;
 729 }
 730
 731 void
 732 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 733 {
 734         int i;
 735         if (vports == NULL)
 736                 return;
 737         for (i=0; vports[i] != NULL && i <= phba->max_vpi; i++)
 738                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 739         kfree(vports);
 740 }
 741
 742
 743 /**
 744  * lpfc_vport_reset_stat_data: Reset the statistical data for the vport.
 745  * @vport: Pointer to vport object.
 746  *
 747  * This function resets the statistical data for the vport. This function
 748  * is called with the host_lock held
 749  **/
 750 void
 751 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 752 {
 753         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 754
 755         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 756                 if (!NLP_CHK_NODE_ACT(ndlp))
 757                         continue;
 758                 if (ndlp->lat_data)
 759                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 760                                 sizeof(struct lpfc_scsicmd_bkt));
 761         }
 762 }
 763
 764
 765 /**
 766  * lpfc_alloc_bucket: Allocate data buffer required for collecting
 767  *  statistical data.
 768  * @vport: Pointer to vport object.
 769  *
 770  * This function allocates data buffer required for all the FC
 771  * nodes of the vport to collect statistical data.
 772  **/
 773 void
 774 lpfc_alloc_bucket(struct lpfc_vport *vport)
 775 {
 776         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 777
 778         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 779                 if (!NLP_CHK_NODE_ACT(ndlp))
 780                         continue;
 781
 782                 kfree(ndlp->lat_data);
 783                 ndlp->lat_data = NULL;
 784
 785                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 786                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 787                                          sizeof(struct lpfc_scsicmd_bkt),
 788                                          GFP_ATOMIC);
 789
 790                         if (!ndlp->lat_data)
 791                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
 792                                         "0287 lpfc_alloc_bucket failed to "
 793                                         "allocate statistical data buffer DID "
 794                                         "0x%x\n", ndlp->nlp_DID);
 795                 }
 796         }
 797 }
 798
 799 /**
 800  * lpfc_free_bucket: Free data buffer required for collecting
 801  *  statistical data.
 802  * @vport: Pointer to vport object.
 803  *
 804  * Th function frees statistical data buffer of all the FC
 805  * nodes of the vport.
 806  **/
 807 void
 808 lpfc_free_bucket(struct lpfc_vport *vport)
 809 {
 810         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 811
 812         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 813                 if (!NLP_CHK_NODE_ACT(ndlp))
 814                         continue;
 815
 816                 kfree(ndlp->lat_data);
 817                 ndlp->lat_data = NULL;
 818         }
 819 }