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         int size;
 292
 293         if ((phba->sli_rev < 3) ||
 294                 !(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
 295                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 296                                 "1808 Create VPORT failed: "
 297                                 "NPIV is not enabled: SLImode:%d\n",
 298                                 phba->sli_rev);
 299                 rc = VPORT_INVAL;
 300                 goto error_out;
 301         }
 302
 303         vpi = lpfc_alloc_vpi(phba);
 304         if (vpi == 0) {
 305                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 306                                 "1809 Create VPORT failed: "
 307                                 "Max VPORTs (%d) exceeded\n",
 308                                 phba->max_vpi);
 309                 rc = VPORT_NORESOURCES;
 310                 goto error_out;
 311         }
 312
 313
 314         /* Assign an unused board number */
 315         if ((instance = lpfc_get_instance()) < 0) {
 316                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 317                                 "1810 Create VPORT failed: Cannot get "
 318                                 "instance number\n");
 319                 lpfc_free_vpi(phba, vpi);
 320                 rc = VPORT_NORESOURCES;
 321                 goto error_out;
 322         }
 323
 324         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
 325         if (!vport) {
 326                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 327                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
 328                 lpfc_free_vpi(phba, vpi);
 329                 rc = VPORT_NORESOURCES;
 330                 goto error_out;
 331         }
 332
 333         vport->vpi = vpi;
 334         lpfc_debugfs_initialize(vport);
 335
 336         if ((status = lpfc_vport_sparm(phba, vport))) {
 337                 if (status == -EINTR) {
 338                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 339                                          "1831 Create VPORT Interrupted.\n");
 340                         rc = VPORT_ERROR;
 341                 } else {
 342                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 343                                          "1813 Create VPORT failed. "
 344                                          "Cannot get sparam\n");
 345                         rc = VPORT_NORESOURCES;
 346                 }
 347                 lpfc_free_vpi(phba, vpi);
 348                 destroy_port(vport);
 349                 goto error_out;
 350         }
 351
 352         memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
 353         memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
 354         size = strnlen(fc_vport->symbolic_name, LPFC_VNAME_LEN);
 355         if (size) {
 356                 vport->vname = kzalloc(size+1, GFP_KERNEL);
 357                 if (!vport->vname) {
 358                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 359                                          "1814 Create VPORT failed. "
 360                                          "vname allocation failed.\n");
 361                         rc = VPORT_ERROR;
 362                         lpfc_free_vpi(phba, vpi);
 363                         destroy_port(vport);
 364                         goto error_out;
 365                 }
 366                 memcpy(vport->vname, fc_vport->symbolic_name, size+1);
 367         }
 368         if (fc_vport->node_name != 0)
 369                 u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 370         if (fc_vport->port_name != 0)
 371                 u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 372
 373         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 374         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 375
 376         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 377             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 378                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 379                                  "1821 Create VPORT failed. "
 380                                  "Invalid WWN format\n");
 381                 lpfc_free_vpi(phba, vpi);
 382                 destroy_port(vport);
 383                 rc = VPORT_INVAL;
 384                 goto error_out;
 385         }
 386
 387         if (!lpfc_unique_wwpn(phba, vport)) {
 388                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 389                                  "1823 Create VPORT failed. "
 390                                  "Duplicate WWN on HBA\n");
 391                 lpfc_free_vpi(phba, vpi);
 392                 destroy_port(vport);
 393                 rc = VPORT_INVAL;
 394                 goto error_out;
 395         }
 396
 397         *(struct lpfc_vport **)fc_vport->dd_data = vport;
 398         vport->fc_vport = fc_vport;
 399
 400         if ((phba->link_state < LPFC_LINK_UP) ||
 401             (phba->fc_topology == TOPOLOGY_LOOP)) {
 402                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 403                 rc = VPORT_OK;
 404                 goto out;
 405         }
 406
 407         if (disable) {
 408                 rc = VPORT_OK;
 409                 goto out;
 410         }
 411
 412         /* Use the Physical nodes Fabric NDLP to determine if the link is
 413          * up and ready to FDISC.
 414          */
 415         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 416         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 417             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 418                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 419                         lpfc_set_disctmo(vport);
 420                         lpfc_initial_fdisc(vport);
 421                 } else {
 422                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 423                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 424                                          "0262 No NPIV Fabric support\n");
 425                 }
 426         } else {
 427                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 428         }
 429         rc = VPORT_OK;
 430
 431 out:
 432         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 433                         "1825 Vport Created.\n");
 434         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 435 error_out:
 436         return rc;
 437 }
 438
 439 static int
 440 disable_vport(struct fc_vport *fc_vport)
 441 {
 442         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 443         struct lpfc_hba   *phba = vport->phba;
 444         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 445         long timeout;
 446
 447         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 448         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 449             && phba->link_state >= LPFC_LINK_UP) {
 450                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 451                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 452                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 453                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 454                                 timeout = schedule_timeout(timeout);
 455         }
 456
 457         lpfc_sli_host_down(vport);
 458
 459         /* Mark all nodes for discovery so we can remove them by
 460          * calling lpfc_cleanup_rpis(vport, 1)
 461          */
 462         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 463                 if (!NLP_CHK_NODE_ACT(ndlp))
 464                         continue;
 465                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 466                         continue;
 467                 lpfc_disc_state_machine(vport, ndlp, NULL,
 468                                         NLP_EVT_DEVICE_RECOVERY);
 469         }
 470         lpfc_cleanup_rpis(vport, 1);
 471
 472         lpfc_stop_vport_timers(vport);
 473         lpfc_unreg_all_rpis(vport);
 474         lpfc_unreg_default_rpis(vport);
 475         /*
 476          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 477          * scsi_host_put() to release the vport.
 478          */
 479         lpfc_mbx_unreg_vpi(vport);
 480
 481         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 482         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 483                          "1826 Vport Disabled.\n");
 484         return VPORT_OK;
 485 }
 486
 487 static int
 488 enable_vport(struct fc_vport *fc_vport)
 489 {
 490         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 491         struct lpfc_hba   *phba = vport->phba;
 492         struct lpfc_nodelist *ndlp = NULL;
 493
 494         if ((phba->link_state < LPFC_LINK_UP) ||
 495             (phba->fc_topology == TOPOLOGY_LOOP)) {
 496                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 497                 return VPORT_OK;
 498         }
 499
 500         vport->load_flag |= FC_LOADING;
 501         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 502
 503         /* Use the Physical nodes Fabric NDLP to determine if the link is
 504          * up and ready to FDISC.
 505          */
 506         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 507         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 508             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 509                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 510                         lpfc_set_disctmo(vport);
 511                         lpfc_initial_fdisc(vport);
 512                 } else {
 513                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 514                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 515                                          "0264 No NPIV Fabric support\n");
 516                 }
 517         } else {
 518                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 519         }
 520         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 521                          "1827 Vport Enabled.\n");
 522         return VPORT_OK;
 523 }
 524
 525 int
 526 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 527 {
 528         if (disable)
 529                 return disable_vport(fc_vport);
 530         else
 531                 return enable_vport(fc_vport);
 532 }
 533
 534
 535 int
 536 lpfc_vport_delete(struct fc_vport *fc_vport)
 537 {
 538         struct lpfc_nodelist *ndlp = NULL;
 539         struct Scsi_Host *shost = (struct Scsi_Host *) fc_vport->shost;
 540         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 541         struct lpfc_hba   *phba = vport->phba;
 542         long timeout;
 543
 544         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 545                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 546                                  "1812 vport_delete failed: Cannot delete "
 547                                  "physical host\n");
 548                 return VPORT_ERROR;
 549         }
 550         /*
 551          * If we are not unloading the driver then prevent the vport_delete
 552          * from happening until after this vport's discovery is finished.
 553          */
 554         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 555                 int check_count = 0;
 556                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 557                        vport->port_state > LPFC_VPORT_FAILED &&
 558                        vport->port_state < LPFC_VPORT_READY) {
 559                         check_count++;
 560                         msleep(1000);
 561                 }
 562                 if (vport->port_state > LPFC_VPORT_FAILED &&
 563                     vport->port_state < LPFC_VPORT_READY)
 564                         return -EAGAIN;
 565         }
 566         /*
 567          * This is a bit of a mess.  We want to ensure the shost doesn't get
 568          * torn down until we're done with the embedded lpfc_vport structure.
 569          *
 570          * Beyond holding a reference for this function, we also need a
 571          * reference for outstanding I/O requests we schedule during delete
 572          * processing.  But once we scsi_remove_host() we can no longer obtain
 573          * a reference through scsi_host_get().
 574          *
 575          * So we take two references here.  We release one reference at the
 576          * bottom of the function -- after delinking the vport.  And we
 577          * release the other at the completion of the unreg_vpi that get's
 578          * initiated after we've disposed of all other resources associated
 579          * with the port.
 580          */
 581         if (!scsi_host_get(shost))
 582                 return VPORT_INVAL;
 583         if (!scsi_host_get(shost)) {
 584                 scsi_host_put(shost);
 585                 return VPORT_INVAL;
 586         }
 587         spin_lock_irq(&phba->hbalock);
 588         vport->load_flag |= FC_UNLOADING;
 589         spin_unlock_irq(&phba->hbalock);
 590         kfree(vport->vname);
 591         lpfc_debugfs_terminate(vport);
 592         fc_remove_host(lpfc_shost_from_vport(vport));
 593         scsi_remove_host(lpfc_shost_from_vport(vport));
 594
 595         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 596
 597         /* In case of driver unload, we shall not perform fabric logo as the
 598          * worker thread already stopped at this stage and, in this case, we
 599          * can safely skip the fabric logo.
 600          */
 601         if (phba->pport->load_flag & FC_UNLOADING) {
 602                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 603                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 604                     phba->link_state >= LPFC_LINK_UP) {
 605                         /* First look for the Fabric ndlp */
 606                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 607                         if (!ndlp)
 608                                 goto skip_logo;
 609                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
 610                                 ndlp = lpfc_enable_node(vport, ndlp,
 611                                                         NLP_STE_UNUSED_NODE);
 612                                 if (!ndlp)
 613                                         goto skip_logo;
 614                         }
 615                         /* Remove ndlp from vport npld list */
 616                         lpfc_dequeue_node(vport, ndlp);
 617
 618                         /* Indicate free memory when release */
 619                         spin_lock_irq(&phba->ndlp_lock);
 620                         NLP_SET_FREE_REQ(ndlp);
 621                         spin_unlock_irq(&phba->ndlp_lock);
 622                         /* Kick off release ndlp when it can be safely done */
 623                         lpfc_nlp_put(ndlp);
 624                 }
 625                 goto skip_logo;
 626         }
 627
 628         /* Otherwise, we will perform fabric logo as needed */
 629         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 630             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 631             phba->link_state >= LPFC_LINK_UP &&
 632             phba->fc_topology != TOPOLOGY_LOOP) {
 633                 if (vport->cfg_enable_da_id) {
 634                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 635                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
 636                                 while (vport->ct_flags && timeout)
 637                                         timeout = schedule_timeout(timeout);
 638                         else
 639                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 640                                                 LOG_VPORT,
 641                                                 "1829 CT command failed to "
 642                                                 "delete objects on fabric. \n");
 643                 }
 644                 /* First look for the Fabric ndlp */
 645                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 646                 if (!ndlp) {
 647                         /* Cannot find existing Fabric ndlp, allocate one */
 648                         ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
 649                         if (!ndlp)
 650                                 goto skip_logo;
 651                         lpfc_nlp_init(vport, ndlp, Fabric_DID);
 652                         /* Indicate free memory when release */
 653                         NLP_SET_FREE_REQ(ndlp);
 654                 } else {
 655                         if (!NLP_CHK_NODE_ACT(ndlp))
 656                                 ndlp = lpfc_enable_node(vport, ndlp,
 657                                                 NLP_STE_UNUSED_NODE);
 658                                 if (!ndlp)
 659                                         goto skip_logo;
 660
 661                         /* Remove ndlp from vport npld list */
 662                         lpfc_dequeue_node(vport, ndlp);
 663                         spin_lock_irq(&phba->ndlp_lock);
 664                         if (!NLP_CHK_FREE_REQ(ndlp))
 665                                 /* Indicate free memory when release */
 666                                 NLP_SET_FREE_REQ(ndlp);
 667                         else {
 668                                 /* Skip this if ndlp is already in free mode */
 669                                 spin_unlock_irq(&phba->ndlp_lock);
 670                                 goto skip_logo;
 671                         }
 672                         spin_unlock_irq(&phba->ndlp_lock);
 673                 }
 674                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 675                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 676                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 677                         goto skip_logo;
 678                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 679                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 680                                 timeout = schedule_timeout(timeout);
 681         }
 682
 683         if (!(phba->pport->load_flag & FC_UNLOADING))
 684                 lpfc_discovery_wait(vport);
 685
 686 skip_logo:
 687         lpfc_cleanup(vport);
 688         lpfc_sli_host_down(vport);
 689
 690         lpfc_stop_vport_timers(vport);
 691
 692         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 693                 lpfc_unreg_all_rpis(vport);
 694                 lpfc_unreg_default_rpis(vport);
 695                 /*
 696                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 697                  * does the scsi_host_put() to release the vport.
 698                  */
 699                 if (lpfc_mbx_unreg_vpi(vport))
 700                         scsi_host_put(shost);
 701         } else
 702                 scsi_host_put(shost);
 703
 704         lpfc_free_vpi(phba, vport->vpi);
 705         vport->work_port_events = 0;
 706         spin_lock_irq(&phba->hbalock);
 707         list_del_init(&vport->listentry);
 708         spin_unlock_irq(&phba->hbalock);
 709         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 710                          "1828 Vport Deleted.\n");
 711         scsi_host_put(shost);
 712         return VPORT_OK;
 713 }
 714
 715 struct lpfc_vport **
 716 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 717 {
 718         struct lpfc_vport *port_iterator;
 719         struct lpfc_vport **vports;
 720         int index = 0;
 721         vports = kzalloc((phba->max_vpi + 1) * sizeof(struct lpfc_vport *),
 722                          GFP_KERNEL);
 723         if (vports == NULL)
 724                 return NULL;
 725         spin_lock_irq(&phba->hbalock);
 726         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 727                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 728                         lpfc_printf_vlog(port_iterator, KERN_WARNING, LOG_VPORT,
 729                                          "1801 Create vport work array FAILED: "
 730                                          "cannot do scsi_host_get\n");
 731                         continue;
 732                 }
 733                 vports[index++] = port_iterator;
 734         }
 735         spin_unlock_irq(&phba->hbalock);
 736         return vports;
 737 }
 738
 739 void
 740 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 741 {
 742         int i;
 743         if (vports == NULL)
 744                 return;
 745         for (i=0; vports[i] != NULL && i <= phba->max_vpi; i++)
 746                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 747         kfree(vports);
 748 }
 749
 750
 751 /**
 752  * lpfc_vport_reset_stat_data: Reset the statistical data for the vport.
 753  * @vport: Pointer to vport object.
 754  *
 755  * This function resets the statistical data for the vport. This function
 756  * is called with the host_lock held
 757  **/
 758 void
 759 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 760 {
 761         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 762
 763         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 764                 if (!NLP_CHK_NODE_ACT(ndlp))
 765                         continue;
 766                 if (ndlp->lat_data)
 767                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 768                                 sizeof(struct lpfc_scsicmd_bkt));
 769         }
 770 }
 771
 772
 773 /**
 774  * lpfc_alloc_bucket: Allocate data buffer required for collecting
 775  *  statistical data.
 776  * @vport: Pointer to vport object.
 777  *
 778  * This function allocates data buffer required for all the FC
 779  * nodes of the vport to collect statistical data.
 780  **/
 781 void
 782 lpfc_alloc_bucket(struct lpfc_vport *vport)
 783 {
 784         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 785
 786         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 787                 if (!NLP_CHK_NODE_ACT(ndlp))
 788                         continue;
 789
 790                 kfree(ndlp->lat_data);
 791                 ndlp->lat_data = NULL;
 792
 793                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 794                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 795                                          sizeof(struct lpfc_scsicmd_bkt),
 796                                          GFP_ATOMIC);
 797
 798                         if (!ndlp->lat_data)
 799                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
 800                                         "0287 lpfc_alloc_bucket failed to "
 801                                         "allocate statistical data buffer DID "
 802                                         "0x%x\n", ndlp->nlp_DID);
 803                 }
 804         }
 805 }
 806
 807 /**
 808  * lpfc_free_bucket: Free data buffer required for collecting
 809  *  statistical data.
 810  * @vport: Pointer to vport object.
 811  *
 812  * Th function frees statistical data buffer of all the FC
 813  * nodes of the vport.
 814  **/
 815 void
 816 lpfc_free_bucket(struct lpfc_vport *vport)
 817 {
 818         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 819
 820         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 821                 if (!NLP_CHK_NODE_ACT(ndlp))
 822                         continue;
 823
 824                 kfree(ndlp->lat_data);
 825                 ndlp->lat_data = NULL;
 826         }
 827 }