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) 2004-2013 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/slab.h>
  30 #include <linux/spinlock.h>
  31
  32 #include <scsi/scsi.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_transport_fc.h>
  36 #include "lpfc_hw4.h"
  37 #include "lpfc_hw.h"
  38 #include "lpfc_sli.h"
  39 #include "lpfc_sli4.h"
  40 #include "lpfc_nl.h"
  41 #include "lpfc_disc.h"
  42 #include "lpfc_scsi.h"
  43 #include "lpfc.h"
  44 #include "lpfc_logmsg.h"
  45 #include "lpfc_crtn.h"
  46 #include "lpfc_version.h"
  47 #include "lpfc_vport.h"
  48
  49 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
  50                                  enum fc_vport_state new_state)
  51 {
  52         struct fc_vport *fc_vport = vport->fc_vport;
  53
  54         if (fc_vport) {
  55                 /*
  56                  * When the transport defines fc_vport_set state we will replace
  57                  * this code with the following line
  58                  */
  59                 /* fc_vport_set_state(fc_vport, new_state); */
  60                 if (new_state != FC_VPORT_INITIALIZING)
  61                         fc_vport->vport_last_state = fc_vport->vport_state;
  62                 fc_vport->vport_state = new_state;
  63         }
  64
  65         /* for all the error states we will set the invternal state to FAILED */
  66         switch (new_state) {
  67         case FC_VPORT_NO_FABRIC_SUPP:
  68         case FC_VPORT_NO_FABRIC_RSCS:
  69         case FC_VPORT_FABRIC_LOGOUT:
  70         case FC_VPORT_FABRIC_REJ_WWN:
  71         case FC_VPORT_FAILED:
  72                 vport->port_state = LPFC_VPORT_FAILED;
  73                 break;
  74         case FC_VPORT_LINKDOWN:
  75                 vport->port_state = LPFC_VPORT_UNKNOWN;
  76                 break;
  77         default:
  78                 /* do nothing */
  79                 break;
  80         }
  81 }
  82
  83 int
  84 lpfc_alloc_vpi(struct lpfc_hba *phba)
  85 {
  86         unsigned long vpi;
  87
  88         spin_lock_irq(&phba->hbalock);
  89         /* Start at bit 1 because vpi zero is reserved for the physical port */
  90         vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
  91         if (vpi > phba->max_vpi)
  92                 vpi = 0;
  93         else
  94                 set_bit(vpi, phba->vpi_bmask);
  95         if (phba->sli_rev == LPFC_SLI_REV4)
  96                 phba->sli4_hba.max_cfg_param.vpi_used++;
  97         spin_unlock_irq(&phba->hbalock);
  98         return vpi;
  99 }
 100
 101 static void
 102 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
 103 {
 104         if (vpi == 0)
 105                 return;
 106         spin_lock_irq(&phba->hbalock);
 107         clear_bit(vpi, phba->vpi_bmask);
 108         if (phba->sli_rev == LPFC_SLI_REV4)
 109                 phba->sli4_hba.max_cfg_param.vpi_used--;
 110         spin_unlock_irq(&phba->hbalock);
 111 }
 112
 113 static int
 114 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
 115 {
 116         LPFC_MBOXQ_t *pmb;
 117         MAILBOX_t *mb;
 118         struct lpfc_dmabuf *mp;
 119         int  rc;
 120
 121         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 122         if (!pmb) {
 123                 return -ENOMEM;
 124         }
 125         mb = &pmb->u.mb;
 126
 127         rc = lpfc_read_sparam(phba, pmb, vport->vpi);
 128         if (rc) {
 129                 mempool_free(pmb, phba->mbox_mem_pool);
 130                 return -ENOMEM;
 131         }
 132
 133         /*
 134          * Grab buffer pointer and clear context1 so we can use
 135          * lpfc_sli_issue_box_wait
 136          */
 137         mp = (struct lpfc_dmabuf *) pmb->context1;
 138         pmb->context1 = NULL;
 139
 140         pmb->vport = vport;
 141         rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
 142         if (rc != MBX_SUCCESS) {
 143                 if (signal_pending(current)) {
 144                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 145                                          "1830 Signal aborted mbxCmd x%x\n",
 146                                          mb->mbxCommand);
 147                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 148                         kfree(mp);
 149                         if (rc != MBX_TIMEOUT)
 150                                 mempool_free(pmb, phba->mbox_mem_pool);
 151                         return -EINTR;
 152                 } else {
 153                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 154                                          "1818 VPort failed init, mbxCmd x%x "
 155                                          "READ_SPARM mbxStatus x%x, rc = x%x\n",
 156                                          mb->mbxCommand, mb->mbxStatus, rc);
 157                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 158                         kfree(mp);
 159                         if (rc != MBX_TIMEOUT)
 160                                 mempool_free(pmb, phba->mbox_mem_pool);
 161                         return -EIO;
 162                 }
 163         }
 164
 165         memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
 166         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 167                sizeof (struct lpfc_name));
 168         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 169                sizeof (struct lpfc_name));
 170
 171         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 172         kfree(mp);
 173         mempool_free(pmb, phba->mbox_mem_pool);
 174
 175         return 0;
 176 }
 177
 178 static int
 179 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
 180                       const char *name_type)
 181 {
 182                                 /* ensure that IEEE format 1 addresses
 183                                  * contain zeros in bits 59-48
 184                                  */
 185         if (!((wwn->u.wwn[0] >> 4) == 1 &&
 186               ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
 187                 return 1;
 188
 189         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 190                         "1822 Invalid %s: %02x:%02x:%02x:%02x:"
 191                         "%02x:%02x:%02x:%02x\n",
 192                         name_type,
 193                         wwn->u.wwn[0], wwn->u.wwn[1],
 194                         wwn->u.wwn[2], wwn->u.wwn[3],
 195                         wwn->u.wwn[4], wwn->u.wwn[5],
 196                         wwn->u.wwn[6], wwn->u.wwn[7]);
 197         return 0;
 198 }
 199
 200 static int
 201 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
 202 {
 203         struct lpfc_vport *vport;
 204         unsigned long flags;
 205
 206         spin_lock_irqsave(&phba->hbalock, flags);
 207         list_for_each_entry(vport, &phba->port_list, listentry) {
 208                 if (vport == new_vport)
 209                         continue;
 210                 /* If they match, return not unique */
 211                 if (memcmp(&vport->fc_sparam.portName,
 212                            &new_vport->fc_sparam.portName,
 213                            sizeof(struct lpfc_name)) == 0) {
 214                         spin_unlock_irqrestore(&phba->hbalock, flags);
 215                         return 0;
 216                 }
 217         }
 218         spin_unlock_irqrestore(&phba->hbalock, flags);
 219         return 1;
 220 }
 221
 222 /**
 223  * lpfc_discovery_wait - Wait for driver discovery to quiesce
 224  * @vport: The virtual port for which this call is being executed.
 225  *
 226  * This driver calls this routine specifically from lpfc_vport_delete
 227  * to enforce a synchronous execution of vport
 228  * delete relative to discovery activities.  The
 229  * lpfc_vport_delete routine should not return until it
 230  * can reasonably guarantee that discovery has quiesced.
 231  * Post FDISC LOGO, the driver must wait until its SAN teardown is
 232  * complete and all resources recovered before allowing
 233  * cleanup.
 234  *
 235  * This routine does not require any locks held.
 236  **/
 237 static void lpfc_discovery_wait(struct lpfc_vport *vport)
 238 {
 239         struct lpfc_hba *phba = vport->phba;
 240         uint32_t wait_flags = 0;
 241         unsigned long wait_time_max;
 242         unsigned long start_time;
 243
 244         wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
 245                      FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
 246
 247         /*
 248          * The time constraint on this loop is a balance between the
 249          * fabric RA_TOV value and dev_loss tmo.  The driver's
 250          * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
 251          */
 252         wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
 253         wait_time_max += jiffies;
 254         start_time = jiffies;
 255         while (time_before(jiffies, wait_time_max)) {
 256                 if ((vport->num_disc_nodes > 0)    ||
 257                     (vport->fc_flag & wait_flags)  ||
 258                     ((vport->port_state > LPFC_VPORT_FAILED) &&
 259                      (vport->port_state < LPFC_VPORT_READY))) {
 260                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 261                                         "1833 Vport discovery quiesce Wait:"
 262                                         " state x%x fc_flags x%x"
 263                                         " num_nodes x%x, waiting 1000 msecs"
 264                                         " total wait msecs x%x\n",
 265                                         vport->port_state, vport->fc_flag,
 266                                         vport->num_disc_nodes,
 267                                         jiffies_to_msecs(jiffies - start_time));
 268                         msleep(1000);
 269                 } else {
 270                         /* Base case.  Wait variants satisfied.  Break out */
 271                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 272                                          "1834 Vport discovery quiesced:"
 273                                          " state x%x fc_flags x%x"
 274                                          " wait msecs x%x\n",
 275                                          vport->port_state, vport->fc_flag,
 276                                          jiffies_to_msecs(jiffies
 277                                                 - start_time));
 278                         break;
 279                 }
 280         }
 281
 282         if (time_after(jiffies, wait_time_max))
 283                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 284                                 "1835 Vport discovery quiesce failed:"
 285                                 " state x%x fc_flags x%x wait msecs x%x\n",
 286                                 vport->port_state, vport->fc_flag,
 287                                 jiffies_to_msecs(jiffies - start_time));
 288 }
 289
 290 int
 291 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 292 {
 293         struct lpfc_nodelist *ndlp;
 294         struct Scsi_Host *shost = fc_vport->shost;
 295         struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
 296         struct lpfc_hba   *phba = pport->phba;
 297         struct lpfc_vport *vport = NULL;
 298         int instance;
 299         int vpi;
 300         int rc = VPORT_ERROR;
 301         int status;
 302
 303         if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
 304                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 305                                 "1808 Create VPORT failed: "
 306                                 "NPIV is not enabled: SLImode:%d\n",
 307                                 phba->sli_rev);
 308                 rc = VPORT_INVAL;
 309                 goto error_out;
 310         }
 311
 312         vpi = lpfc_alloc_vpi(phba);
 313         if (vpi == 0) {
 314                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 315                                 "1809 Create VPORT failed: "
 316                                 "Max VPORTs (%d) exceeded\n",
 317                                 phba->max_vpi);
 318                 rc = VPORT_NORESOURCES;
 319                 goto error_out;
 320         }
 321
 322         /* Assign an unused board number */
 323         if ((instance = lpfc_get_instance()) < 0) {
 324                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 325                                 "1810 Create VPORT failed: Cannot get "
 326                                 "instance number\n");
 327                 lpfc_free_vpi(phba, vpi);
 328                 rc = VPORT_NORESOURCES;
 329                 goto error_out;
 330         }
 331
 332         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
 333         if (!vport) {
 334                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 335                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
 336                 lpfc_free_vpi(phba, vpi);
 337                 rc = VPORT_NORESOURCES;
 338                 goto error_out;
 339         }
 340
 341         vport->vpi = vpi;
 342         lpfc_debugfs_initialize(vport);
 343
 344         if ((status = lpfc_vport_sparm(phba, vport))) {
 345                 if (status == -EINTR) {
 346                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 347                                          "1831 Create VPORT Interrupted.\n");
 348                         rc = VPORT_ERROR;
 349                 } else {
 350                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 351                                          "1813 Create VPORT failed. "
 352                                          "Cannot get sparam\n");
 353                         rc = VPORT_NORESOURCES;
 354                 }
 355                 lpfc_free_vpi(phba, vpi);
 356                 destroy_port(vport);
 357                 goto error_out;
 358         }
 359
 360         u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 361         u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 362
 363         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 364         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 365
 366         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 367             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 368                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 369                                  "1821 Create VPORT failed. "
 370                                  "Invalid WWN format\n");
 371                 lpfc_free_vpi(phba, vpi);
 372                 destroy_port(vport);
 373                 rc = VPORT_INVAL;
 374                 goto error_out;
 375         }
 376
 377         if (!lpfc_unique_wwpn(phba, vport)) {
 378                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 379                                  "1823 Create VPORT failed. "
 380                                  "Duplicate WWN on HBA\n");
 381                 lpfc_free_vpi(phba, vpi);
 382                 destroy_port(vport);
 383                 rc = VPORT_INVAL;
 384                 goto error_out;
 385         }
 386
 387         /* Create binary sysfs attribute for vport */
 388         lpfc_alloc_sysfs_attr(vport);
 389
 390         /* Set the DFT_LUN_Q_DEPTH accordingly */
 391         vport->cfg_lun_queue_depth  = phba->pport->cfg_lun_queue_depth;
 392
 393         *(struct lpfc_vport **)fc_vport->dd_data = vport;
 394         vport->fc_vport = fc_vport;
 395
 396         /*
 397          * In SLI4, the vpi must be activated before it can be used
 398          * by the port.
 399          */
 400         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 401             (pport->fc_flag & FC_VFI_REGISTERED)) {
 402                 rc = lpfc_sli4_init_vpi(vport);
 403                 if (rc) {
 404                         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 405                                         "1838 Failed to INIT_VPI on vpi %d "
 406                                         "status %d\n", vpi, rc);
 407                         rc = VPORT_NORESOURCES;
 408                         lpfc_free_vpi(phba, vpi);
 409                         goto error_out;
 410                 }
 411         } else if (phba->sli_rev == LPFC_SLI_REV4) {
 412                 /*
 413                  * Driver cannot INIT_VPI now. Set the flags to
 414                  * init_vpi when reg_vfi complete.
 415                  */
 416                 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 417                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 418                 rc = VPORT_OK;
 419                 goto out;
 420         }
 421
 422         if ((phba->link_state < LPFC_LINK_UP) ||
 423             (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
 424             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 425                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 426                 rc = VPORT_OK;
 427                 goto out;
 428         }
 429
 430         if (disable) {
 431                 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 432                 rc = VPORT_OK;
 433                 goto out;
 434         }
 435
 436         /* Use the Physical nodes Fabric NDLP to determine if the link is
 437          * up and ready to FDISC.
 438          */
 439         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 440         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 441             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 442                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 443                         lpfc_set_disctmo(vport);
 444                         lpfc_initial_fdisc(vport);
 445                 } else {
 446                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 447                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 448                                          "0262 No NPIV Fabric support\n");
 449                 }
 450         } else {
 451                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 452         }
 453         rc = VPORT_OK;
 454
 455 out:
 456         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 457                         "1825 Vport Created.\n");
 458         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 459 error_out:
 460         return rc;
 461 }
 462
 463 static int
 464 disable_vport(struct fc_vport *fc_vport)
 465 {
 466         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 467         struct lpfc_hba   *phba = vport->phba;
 468         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 469         long timeout;
 470         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 471
 472         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 473         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 474             && phba->link_state >= LPFC_LINK_UP) {
 475                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 476                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 477                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 478                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 479                                 timeout = schedule_timeout(timeout);
 480         }
 481
 482         lpfc_sli_host_down(vport);
 483
 484         /* Mark all nodes for discovery so we can remove them by
 485          * calling lpfc_cleanup_rpis(vport, 1)
 486          */
 487         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 488                 if (!NLP_CHK_NODE_ACT(ndlp))
 489                         continue;
 490                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 491                         continue;
 492                 lpfc_disc_state_machine(vport, ndlp, NULL,
 493                                         NLP_EVT_DEVICE_RECOVERY);
 494         }
 495         lpfc_cleanup_rpis(vport, 1);
 496
 497         lpfc_stop_vport_timers(vport);
 498         lpfc_unreg_all_rpis(vport);
 499         lpfc_unreg_default_rpis(vport);
 500         /*
 501          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 502          * scsi_host_put() to release the vport.
 503          */
 504         lpfc_mbx_unreg_vpi(vport);
 505         spin_lock_irq(shost->host_lock);
 506         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 507         spin_unlock_irq(shost->host_lock);
 508
 509         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 510         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 511                          "1826 Vport Disabled.\n");
 512         return VPORT_OK;
 513 }
 514
 515 static int
 516 enable_vport(struct fc_vport *fc_vport)
 517 {
 518         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 519         struct lpfc_hba   *phba = vport->phba;
 520         struct lpfc_nodelist *ndlp = NULL;
 521         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 522
 523         if ((phba->link_state < LPFC_LINK_UP) ||
 524             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 525                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 526                 return VPORT_OK;
 527         }
 528
 529         spin_lock_irq(shost->host_lock);
 530         vport->load_flag |= FC_LOADING;
 531         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
 532                 spin_unlock_irq(shost->host_lock);
 533                 lpfc_issue_init_vpi(vport);
 534                 goto out;
 535         }
 536
 537         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 538         spin_unlock_irq(shost->host_lock);
 539
 540         /* Use the Physical nodes Fabric NDLP to determine if the link is
 541          * up and ready to FDISC.
 542          */
 543         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 544         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 545             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 546                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 547                         lpfc_set_disctmo(vport);
 548                         lpfc_initial_fdisc(vport);
 549                 } else {
 550                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 551                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 552                                          "0264 No NPIV Fabric support\n");
 553                 }
 554         } else {
 555                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 556         }
 557
 558 out:
 559         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 560                          "1827 Vport Enabled.\n");
 561         return VPORT_OK;
 562 }
 563
 564 int
 565 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 566 {
 567         if (disable)
 568                 return disable_vport(fc_vport);
 569         else
 570                 return enable_vport(fc_vport);
 571 }
 572
 573
 574 int
 575 lpfc_vport_delete(struct fc_vport *fc_vport)
 576 {
 577         struct lpfc_nodelist *ndlp = NULL;
 578         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 579         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 580         struct lpfc_hba   *phba = vport->phba;
 581         long timeout;
 582         bool ns_ndlp_referenced = false;
 583
 584         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 585                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 586                                  "1812 vport_delete failed: Cannot delete "
 587                                  "physical host\n");
 588                 return VPORT_ERROR;
 589         }
 590
 591         /* If the vport is a static vport fail the deletion. */
 592         if ((vport->vport_flag & STATIC_VPORT) &&
 593                 !(phba->pport->load_flag & FC_UNLOADING)) {
 594                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 595                                  "1837 vport_delete failed: Cannot delete "
 596                                  "static vport.\n");
 597                 return VPORT_ERROR;
 598         }
 599         spin_lock_irq(&phba->hbalock);
 600         vport->load_flag |= FC_UNLOADING;
 601         spin_unlock_irq(&phba->hbalock);
 602         /*
 603          * If we are not unloading the driver then prevent the vport_delete
 604          * from happening until after this vport's discovery is finished.
 605          */
 606         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 607                 int check_count = 0;
 608                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 609                        vport->port_state > LPFC_VPORT_FAILED &&
 610                        vport->port_state < LPFC_VPORT_READY) {
 611                         check_count++;
 612                         msleep(1000);
 613                 }
 614                 if (vport->port_state > LPFC_VPORT_FAILED &&
 615                     vport->port_state < LPFC_VPORT_READY)
 616                         return -EAGAIN;
 617         }
 618
 619         /*
 620          * Take early refcount for outstanding I/O requests we schedule during
 621          * delete processing for unreg_vpi.  Always keep this before
 622          * scsi_remove_host() as we can no longer obtain a reference through
 623          * scsi_host_get() after scsi_host_remove as shost is set to SHOST_DEL.
 624          */
 625         if (!scsi_host_get(shost))
 626                 return VPORT_INVAL;
 627
 628         lpfc_free_sysfs_attr(vport);
 629
 630         lpfc_debugfs_terminate(vport);
 631
 632         /*
 633          * The call to fc_remove_host might release the NameServer ndlp. Since
 634          * we might need to use the ndlp to send the DA_ID CT command,
 635          * increment the reference for the NameServer ndlp to prevent it from
 636          * being released.
 637          */
 638         ndlp = lpfc_findnode_did(vport, NameServer_DID);
 639         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 640                 lpfc_nlp_get(ndlp);
 641                 ns_ndlp_referenced = true;
 642         }
 643
 644         /* Remove FC host and then SCSI host with the vport */
 645         fc_remove_host(shost);
 646         scsi_remove_host(shost);
 647
 648         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 649
 650         /* In case of driver unload, we shall not perform fabric logo as the
 651          * worker thread already stopped at this stage and, in this case, we
 652          * can safely skip the fabric logo.
 653          */
 654         if (phba->pport->load_flag & FC_UNLOADING) {
 655                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 656                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 657                     phba->link_state >= LPFC_LINK_UP) {
 658                         /* First look for the Fabric ndlp */
 659                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 660                         if (!ndlp)
 661                                 goto skip_logo;
 662                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
 663                                 ndlp = lpfc_enable_node(vport, ndlp,
 664                                                         NLP_STE_UNUSED_NODE);
 665                                 if (!ndlp)
 666                                         goto skip_logo;
 667                         }
 668                         /* Remove ndlp from vport npld list */
 669                         lpfc_dequeue_node(vport, ndlp);
 670
 671                         /* Indicate free memory when release */
 672                         spin_lock_irq(&phba->ndlp_lock);
 673                         NLP_SET_FREE_REQ(ndlp);
 674                         spin_unlock_irq(&phba->ndlp_lock);
 675                         /* Kick off release ndlp when it can be safely done */
 676                         lpfc_nlp_put(ndlp);
 677                 }
 678                 goto skip_logo;
 679         }
 680
 681         /* Otherwise, we will perform fabric logo as needed */
 682         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 683             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 684             phba->link_state >= LPFC_LINK_UP &&
 685             phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
 686                 if (vport->cfg_enable_da_id) {
 687                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 688                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
 689                                 while (vport->ct_flags && timeout)
 690                                         timeout = schedule_timeout(timeout);
 691                         else
 692                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 693                                                 LOG_VPORT,
 694                                                 "1829 CT command failed to "
 695                                                 "delete objects on fabric\n");
 696                 }
 697                 /* First look for the Fabric ndlp */
 698                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 699                 if (!ndlp) {
 700                         /* Cannot find existing Fabric ndlp, allocate one */
 701                         ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
 702                         if (!ndlp)
 703                                 goto skip_logo;
 704                         lpfc_nlp_init(vport, ndlp, Fabric_DID);
 705                         /* Indicate free memory when release */
 706                         NLP_SET_FREE_REQ(ndlp);
 707                 } else {
 708                         if (!NLP_CHK_NODE_ACT(ndlp)) {
 709                                 ndlp = lpfc_enable_node(vport, ndlp,
 710                                                 NLP_STE_UNUSED_NODE);
 711                                 if (!ndlp)
 712                                         goto skip_logo;
 713                         }
 714
 715                         /* Remove ndlp from vport list */
 716                         lpfc_dequeue_node(vport, ndlp);
 717                         spin_lock_irq(&phba->ndlp_lock);
 718                         if (!NLP_CHK_FREE_REQ(ndlp))
 719                                 /* Indicate free memory when release */
 720                                 NLP_SET_FREE_REQ(ndlp);
 721                         else {
 722                                 /* Skip this if ndlp is already in free mode */
 723                                 spin_unlock_irq(&phba->ndlp_lock);
 724                                 goto skip_logo;
 725                         }
 726                         spin_unlock_irq(&phba->ndlp_lock);
 727                 }
 728
 729                 /*
 730                  * If the vpi is not registered, then a valid FDISC doesn't
 731                  * exist and there is no need for a ELS LOGO.  Just cleanup
 732                  * the ndlp.
 733                  */
 734                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED)) {
 735                         lpfc_nlp_put(ndlp);
 736                         goto skip_logo;
 737                 }
 738
 739                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 740                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 741                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 742                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 743                                 timeout = schedule_timeout(timeout);
 744         }
 745
 746         if (!(phba->pport->load_flag & FC_UNLOADING))
 747                 lpfc_discovery_wait(vport);
 748
 749 skip_logo:
 750
 751         /*
 752          * If the NameServer ndlp has been incremented to allow the DA_ID CT
 753          * command to be sent, decrement the ndlp now.
 754          */
 755         if (ns_ndlp_referenced) {
 756                 ndlp = lpfc_findnode_did(vport, NameServer_DID);
 757                 lpfc_nlp_put(ndlp);
 758         }
 759
 760         lpfc_cleanup(vport);
 761         lpfc_sli_host_down(vport);
 762
 763         lpfc_stop_vport_timers(vport);
 764
 765         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 766                 lpfc_unreg_all_rpis(vport);
 767                 lpfc_unreg_default_rpis(vport);
 768                 /*
 769                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 770                  * does the scsi_host_put() to release the vport.
 771                  */
 772                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED) ||
 773                                 lpfc_mbx_unreg_vpi(vport))
 774                         scsi_host_put(shost);
 775         } else {
 776                 scsi_host_put(shost);
 777         }
 778
 779         lpfc_free_vpi(phba, vport->vpi);
 780         vport->work_port_events = 0;
 781         spin_lock_irq(&phba->hbalock);
 782         list_del_init(&vport->listentry);
 783         spin_unlock_irq(&phba->hbalock);
 784         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 785                          "1828 Vport Deleted.\n");
 786         scsi_host_put(shost);
 787         return VPORT_OK;
 788 }
 789
 790 struct lpfc_vport **
 791 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 792 {
 793         struct lpfc_vport *port_iterator;
 794         struct lpfc_vport **vports;
 795         int index = 0;
 796         vports = kzalloc((phba->max_vports + 1) * sizeof(struct lpfc_vport *),
 797                          GFP_KERNEL);
 798         if (vports == NULL)
 799                 return NULL;
 800         spin_lock_irq(&phba->hbalock);
 801         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 802                 if (port_iterator->load_flag & FC_UNLOADING)
 803                         continue;
 804                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 805                         lpfc_printf_vlog(port_iterator, KERN_ERR, LOG_VPORT,
 806                                          "1801 Create vport work array FAILED: "
 807                                          "cannot do scsi_host_get\n");
 808                         continue;
 809                 }
 810                 vports[index++] = port_iterator;
 811         }
 812         spin_unlock_irq(&phba->hbalock);
 813         return vports;
 814 }
 815
 816 void
 817 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 818 {
 819         int i;
 820         if (vports == NULL)
 821                 return;
 822         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
 823                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 824         kfree(vports);
 825 }
 826
 827
 828 /**
 829  * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
 830  * @vport: Pointer to vport object.
 831  *
 832  * This function resets the statistical data for the vport. This function
 833  * is called with the host_lock held
 834  **/
 835 void
 836 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 837 {
 838         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 839
 840         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 841                 if (!NLP_CHK_NODE_ACT(ndlp))
 842                         continue;
 843                 if (ndlp->lat_data)
 844                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 845                                 sizeof(struct lpfc_scsicmd_bkt));
 846         }
 847 }
 848
 849
 850 /**
 851  * lpfc_alloc_bucket - Allocate data buffer required for statistical data
 852  * @vport: Pointer to vport object.
 853  *
 854  * This function allocates data buffer required for all the FC
 855  * nodes of the vport to collect statistical data.
 856  **/
 857 void
 858 lpfc_alloc_bucket(struct lpfc_vport *vport)
 859 {
 860         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 861
 862         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 863                 if (!NLP_CHK_NODE_ACT(ndlp))
 864                         continue;
 865
 866                 kfree(ndlp->lat_data);
 867                 ndlp->lat_data = NULL;
 868
 869                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 870                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 871                                          sizeof(struct lpfc_scsicmd_bkt),
 872                                          GFP_ATOMIC);
 873
 874                         if (!ndlp->lat_data)
 875                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
 876                                         "0287 lpfc_alloc_bucket failed to "
 877                                         "allocate statistical data buffer DID "
 878                                         "0x%x\n", ndlp->nlp_DID);
 879                 }
 880         }
 881 }
 882
 883 /**
 884  * lpfc_free_bucket - Free data buffer required for statistical data
 885  * @vport: Pointer to vport object.
 886  *
 887  * Th function frees statistical data buffer of all the FC
 888  * nodes of the vport.
 889  **/
 890 void
 891 lpfc_free_bucket(struct lpfc_vport *vport)
 892 {
 893         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 894
 895         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 896                 if (!NLP_CHK_NODE_ACT(ndlp))
 897                         continue;
 898
 899                 kfree(ndlp->lat_data);
 900                 ndlp->lat_data = NULL;
 901         }
 902 }