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_hw4.h"
  36 #include "lpfc_hw.h"
  37 #include "lpfc_sli.h"
  38 #include "lpfc_sli4.h"
  39 #include "lpfc_nl.h"
  40 #include "lpfc_disc.h"
  41 #include "lpfc_scsi.h"
  42 #include "lpfc.h"
  43 #include "lpfc_logmsg.h"
  44 #include "lpfc_crtn.h"
  45 #include "lpfc_version.h"
  46 #include "lpfc_vport.h"
  47
  48 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
  49                                  enum fc_vport_state new_state)
  50 {
  51         struct fc_vport *fc_vport = vport->fc_vport;
  52
  53         if (fc_vport) {
  54                 /*
  55                  * When the transport defines fc_vport_set state we will replace
  56                  * this code with the following line
  57                  */
  58                 /* fc_vport_set_state(fc_vport, new_state); */
  59                 if (new_state != FC_VPORT_INITIALIZING)
  60                         fc_vport->vport_last_state = fc_vport->vport_state;
  61                 fc_vport->vport_state = new_state;
  62         }
  63
  64         /* for all the error states we will set the invternal state to FAILED */
  65         switch (new_state) {
  66         case FC_VPORT_NO_FABRIC_SUPP:
  67         case FC_VPORT_NO_FABRIC_RSCS:
  68         case FC_VPORT_FABRIC_LOGOUT:
  69         case FC_VPORT_FABRIC_REJ_WWN:
  70         case FC_VPORT_FAILED:
  71                 vport->port_state = LPFC_VPORT_FAILED;
  72                 break;
  73         case FC_VPORT_LINKDOWN:
  74                 vport->port_state = LPFC_VPORT_UNKNOWN;
  75                 break;
  76         default:
  77                 /* do nothing */
  78                 break;
  79         }
  80 }
  81
  82 static int
  83 lpfc_alloc_vpi(struct lpfc_hba *phba)
  84 {
  85         int  vpi;
  86
  87         spin_lock_irq(&phba->hbalock);
  88         /* Start at bit 1 because vpi zero is reserved for the physical port */
  89         vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
  90         if (vpi > phba->max_vpi)
  91                 vpi = 0;
  92         else
  93                 set_bit(vpi, phba->vpi_bmask);
  94         if (phba->sli_rev == LPFC_SLI_REV4)
  95                 phba->sli4_hba.max_cfg_param.vpi_used++;
  96         spin_unlock_irq(&phba->hbalock);
  97         return vpi;
  98 }
  99
 100 static void
 101 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
 102 {
 103         if (vpi == 0)
 104                 return;
 105         spin_lock_irq(&phba->hbalock);
 106         clear_bit(vpi, phba->vpi_bmask);
 107         if (phba->sli_rev == LPFC_SLI_REV4)
 108                 phba->sli4_hba.max_cfg_param.vpi_used--;
 109         spin_unlock_irq(&phba->hbalock);
 110 }
 111
 112 static int
 113 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
 114 {
 115         LPFC_MBOXQ_t *pmb;
 116         MAILBOX_t *mb;
 117         struct lpfc_dmabuf *mp;
 118         int  rc;
 119
 120         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 121         if (!pmb) {
 122                 return -ENOMEM;
 123         }
 124         mb = &pmb->u.mb;
 125
 126         rc = lpfc_read_sparam(phba, pmb, vport->vpi);
 127         if (rc) {
 128                 mempool_free(pmb, phba->mbox_mem_pool);
 129                 return -ENOMEM;
 130         }
 131
 132         /*
 133          * Grab buffer pointer and clear context1 so we can use
 134          * lpfc_sli_issue_box_wait
 135          */
 136         mp = (struct lpfc_dmabuf *) pmb->context1;
 137         pmb->context1 = NULL;
 138
 139         pmb->vport = vport;
 140         rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
 141         if (rc != MBX_SUCCESS) {
 142                 if (signal_pending(current)) {
 143                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 144                                          "1830 Signal aborted mbxCmd x%x\n",
 145                                          mb->mbxCommand);
 146                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 147                         kfree(mp);
 148                         if (rc != MBX_TIMEOUT)
 149                                 mempool_free(pmb, phba->mbox_mem_pool);
 150                         return -EINTR;
 151                 } else {
 152                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 153                                          "1818 VPort failed init, mbxCmd x%x "
 154                                          "READ_SPARM mbxStatus x%x, rc = x%x\n",
 155                                          mb->mbxCommand, mb->mbxStatus, rc);
 156                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 157                         kfree(mp);
 158                         if (rc != MBX_TIMEOUT)
 159                                 mempool_free(pmb, phba->mbox_mem_pool);
 160                         return -EIO;
 161                 }
 162         }
 163
 164         memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
 165         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 166                sizeof (struct lpfc_name));
 167         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 168                sizeof (struct lpfc_name));
 169
 170         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 171         kfree(mp);
 172         mempool_free(pmb, phba->mbox_mem_pool);
 173
 174         return 0;
 175 }
 176
 177 static int
 178 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
 179                       const char *name_type)
 180 {
 181                                 /* ensure that IEEE format 1 addresses
 182                                  * contain zeros in bits 59-48
 183                                  */
 184         if (!((wwn->u.wwn[0] >> 4) == 1 &&
 185               ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
 186                 return 1;
 187
 188         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 189                         "1822 Invalid %s: %02x:%02x:%02x:%02x:"
 190                         "%02x:%02x:%02x:%02x\n",
 191                         name_type,
 192                         wwn->u.wwn[0], wwn->u.wwn[1],
 193                         wwn->u.wwn[2], wwn->u.wwn[3],
 194                         wwn->u.wwn[4], wwn->u.wwn[5],
 195                         wwn->u.wwn[6], wwn->u.wwn[7]);
 196         return 0;
 197 }
 198
 199 static int
 200 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
 201 {
 202         struct lpfc_vport *vport;
 203         unsigned long flags;
 204
 205         spin_lock_irqsave(&phba->hbalock, flags);
 206         list_for_each_entry(vport, &phba->port_list, listentry) {
 207                 if (vport == new_vport)
 208                         continue;
 209                 /* If they match, return not unique */
 210                 if (memcmp(&vport->fc_sparam.portName,
 211                            &new_vport->fc_sparam.portName,
 212                            sizeof(struct lpfc_name)) == 0) {
 213                         spin_unlock_irqrestore(&phba->hbalock, flags);
 214                         return 0;
 215                 }
 216         }
 217         spin_unlock_irqrestore(&phba->hbalock, flags);
 218         return 1;
 219 }
 220
 221 /**
 222  * lpfc_discovery_wait - Wait for driver discovery to quiesce
 223  * @vport: The virtual port for which this call is being executed.
 224  *
 225  * This driver calls this routine specifically from lpfc_vport_delete
 226  * to enforce a synchronous execution of vport
 227  * delete relative to discovery activities.  The
 228  * lpfc_vport_delete routine should not return until it
 229  * can reasonably guarantee that discovery has quiesced.
 230  * Post FDISC LOGO, the driver must wait until its SAN teardown is
 231  * complete and all resources recovered before allowing
 232  * cleanup.
 233  *
 234  * This routine does not require any locks held.
 235  **/
 236 static void lpfc_discovery_wait(struct lpfc_vport *vport)
 237 {
 238         struct lpfc_hba *phba = vport->phba;
 239         uint32_t wait_flags = 0;
 240         unsigned long wait_time_max;
 241         unsigned long start_time;
 242
 243         wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
 244                      FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
 245
 246         /*
 247          * The time constraint on this loop is a balance between the
 248          * fabric RA_TOV value and dev_loss tmo.  The driver's
 249          * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
 250          */
 251         wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
 252         wait_time_max += jiffies;
 253         start_time = jiffies;
 254         while (time_before(jiffies, wait_time_max)) {
 255                 if ((vport->num_disc_nodes > 0)    ||
 256                     (vport->fc_flag & wait_flags)  ||
 257                     ((vport->port_state > LPFC_VPORT_FAILED) &&
 258                      (vport->port_state < LPFC_VPORT_READY))) {
 259                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 260                                         "1833 Vport discovery quiesce Wait:"
 261                                         " state x%x fc_flags x%x"
 262                                         " num_nodes x%x, waiting 1000 msecs"
 263                                         " total wait msecs x%x\n",
 264                                         vport->port_state, vport->fc_flag,
 265                                         vport->num_disc_nodes,
 266                                         jiffies_to_msecs(jiffies - start_time));
 267                         msleep(1000);
 268                 } else {
 269                         /* Base case.  Wait variants satisfied.  Break out */
 270                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 271                                          "1834 Vport discovery quiesced:"
 272                                          " state x%x fc_flags x%x"
 273                                          " wait msecs x%x\n",
 274                                          vport->port_state, vport->fc_flag,
 275                                          jiffies_to_msecs(jiffies
 276                                                 - start_time));
 277                         break;
 278                 }
 279         }
 280
 281         if (time_after(jiffies, wait_time_max))
 282                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 283                                 "1835 Vport discovery quiesce failed:"
 284                                 " state x%x fc_flags x%x wait msecs x%x\n",
 285                                 vport->port_state, vport->fc_flag,
 286                                 jiffies_to_msecs(jiffies - start_time));
 287 }
 288
 289 int
 290 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 291 {
 292         struct lpfc_nodelist *ndlp;
 293         struct Scsi_Host *shost = fc_vport->shost;
 294         struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
 295         struct lpfc_hba   *phba = pport->phba;
 296         struct lpfc_vport *vport = NULL;
 297         int instance;
 298         int vpi;
 299         int rc = VPORT_ERROR;
 300         int status;
 301
 302         if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
 303                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 304                                 "1808 Create VPORT failed: "
 305                                 "NPIV is not enabled: SLImode:%d\n",
 306                                 phba->sli_rev);
 307                 rc = VPORT_INVAL;
 308                 goto error_out;
 309         }
 310
 311         vpi = lpfc_alloc_vpi(phba);
 312         if (vpi == 0) {
 313                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 314                                 "1809 Create VPORT failed: "
 315                                 "Max VPORTs (%d) exceeded\n",
 316                                 phba->max_vpi);
 317                 rc = VPORT_NORESOURCES;
 318                 goto error_out;
 319         }
 320
 321         /* Assign an unused board number */
 322         if ((instance = lpfc_get_instance()) < 0) {
 323                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 324                                 "1810 Create VPORT failed: Cannot get "
 325                                 "instance number\n");
 326                 lpfc_free_vpi(phba, vpi);
 327                 rc = VPORT_NORESOURCES;
 328                 goto error_out;
 329         }
 330
 331         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
 332         if (!vport) {
 333                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 334                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
 335                 lpfc_free_vpi(phba, vpi);
 336                 rc = VPORT_NORESOURCES;
 337                 goto error_out;
 338         }
 339
 340         vport->vpi = vpi;
 341         lpfc_debugfs_initialize(vport);
 342
 343         if ((status = lpfc_vport_sparm(phba, vport))) {
 344                 if (status == -EINTR) {
 345                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 346                                          "1831 Create VPORT Interrupted.\n");
 347                         rc = VPORT_ERROR;
 348                 } else {
 349                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 350                                          "1813 Create VPORT failed. "
 351                                          "Cannot get sparam\n");
 352                         rc = VPORT_NORESOURCES;
 353                 }
 354                 lpfc_free_vpi(phba, vpi);
 355                 destroy_port(vport);
 356                 goto error_out;
 357         }
 358
 359         u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 360         u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 361
 362         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 363         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 364
 365         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 366             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 367                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 368                                  "1821 Create VPORT failed. "
 369                                  "Invalid WWN format\n");
 370                 lpfc_free_vpi(phba, vpi);
 371                 destroy_port(vport);
 372                 rc = VPORT_INVAL;
 373                 goto error_out;
 374         }
 375
 376         if (!lpfc_unique_wwpn(phba, vport)) {
 377                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 378                                  "1823 Create VPORT failed. "
 379                                  "Duplicate WWN on HBA\n");
 380                 lpfc_free_vpi(phba, vpi);
 381                 destroy_port(vport);
 382                 rc = VPORT_INVAL;
 383                 goto error_out;
 384         }
 385
 386         /* Create binary sysfs attribute for vport */
 387         lpfc_alloc_sysfs_attr(vport);
 388
 389         *(struct lpfc_vport **)fc_vport->dd_data = vport;
 390         vport->fc_vport = fc_vport;
 391
 392         /*
 393          * In SLI4, the vpi must be activated before it can be used
 394          * by the port.
 395          */
 396         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 397                 (pport->fc_flag & FC_VFI_REGISTERED)) {
 398                 rc = lpfc_sli4_init_vpi(phba, vpi);
 399                 if (rc) {
 400                         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 401                                         "1838 Failed to INIT_VPI on vpi %d "
 402                                         "status %d\n", vpi, rc);
 403                         rc = VPORT_NORESOURCES;
 404                         lpfc_free_vpi(phba, vpi);
 405                         goto error_out;
 406                 }
 407         } else if (phba->sli_rev == LPFC_SLI_REV4) {
 408                 /*
 409                  * Driver cannot INIT_VPI now. Set the flags to
 410                  * init_vpi when reg_vfi complete.
 411                  */
 412                 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 413                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 414                 rc = VPORT_OK;
 415                 goto out;
 416         }
 417
 418         if ((phba->link_state < LPFC_LINK_UP) ||
 419             (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
 420             (phba->fc_topology == TOPOLOGY_LOOP)) {
 421                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 422                 rc = VPORT_OK;
 423                 goto out;
 424         }
 425
 426         if (disable) {
 427                 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 428                 rc = VPORT_OK;
 429                 goto out;
 430         }
 431
 432         /* Use the Physical nodes Fabric NDLP to determine if the link is
 433          * up and ready to FDISC.
 434          */
 435         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 436         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 437             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 438                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 439                         lpfc_set_disctmo(vport);
 440                         lpfc_initial_fdisc(vport);
 441                 } else {
 442                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 443                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 444                                          "0262 No NPIV Fabric support\n");
 445                 }
 446         } else {
 447                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 448         }
 449         rc = VPORT_OK;
 450
 451 out:
 452         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 453                         "1825 Vport Created.\n");
 454         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 455 error_out:
 456         return rc;
 457 }
 458
 459 static int
 460 disable_vport(struct fc_vport *fc_vport)
 461 {
 462         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 463         struct lpfc_hba   *phba = vport->phba;
 464         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 465         long timeout;
 466
 467         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 468         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 469             && phba->link_state >= LPFC_LINK_UP) {
 470                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 471                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 472                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 473                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 474                                 timeout = schedule_timeout(timeout);
 475         }
 476
 477         lpfc_sli_host_down(vport);
 478
 479         /* Mark all nodes for discovery so we can remove them by
 480          * calling lpfc_cleanup_rpis(vport, 1)
 481          */
 482         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 483                 if (!NLP_CHK_NODE_ACT(ndlp))
 484                         continue;
 485                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 486                         continue;
 487                 lpfc_disc_state_machine(vport, ndlp, NULL,
 488                                         NLP_EVT_DEVICE_RECOVERY);
 489         }
 490         lpfc_cleanup_rpis(vport, 1);
 491
 492         lpfc_stop_vport_timers(vport);
 493         lpfc_unreg_all_rpis(vport);
 494         lpfc_unreg_default_rpis(vport);
 495         /*
 496          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 497          * scsi_host_put() to release the vport.
 498          */
 499         lpfc_mbx_unreg_vpi(vport);
 500
 501         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 502         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 503                          "1826 Vport Disabled.\n");
 504         return VPORT_OK;
 505 }
 506
 507 static int
 508 enable_vport(struct fc_vport *fc_vport)
 509 {
 510         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 511         struct lpfc_hba   *phba = vport->phba;
 512         struct lpfc_nodelist *ndlp = NULL;
 513         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 514
 515         if ((phba->link_state < LPFC_LINK_UP) ||
 516             (phba->fc_topology == TOPOLOGY_LOOP)) {
 517                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 518                 return VPORT_OK;
 519         }
 520
 521         spin_lock_irq(shost->host_lock);
 522         vport->load_flag |= FC_LOADING;
 523         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 524         spin_unlock_irq(shost->host_lock);
 525
 526         /* Use the Physical nodes Fabric NDLP to determine if the link is
 527          * up and ready to FDISC.
 528          */
 529         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 530         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 531             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 532                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 533                         lpfc_set_disctmo(vport);
 534                         lpfc_initial_fdisc(vport);
 535                 } else {
 536                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 537                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 538                                          "0264 No NPIV Fabric support\n");
 539                 }
 540         } else {
 541                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 542         }
 543         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 544                          "1827 Vport Enabled.\n");
 545         return VPORT_OK;
 546 }
 547
 548 int
 549 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 550 {
 551         if (disable)
 552                 return disable_vport(fc_vport);
 553         else
 554                 return enable_vport(fc_vport);
 555 }
 556
 557
 558 int
 559 lpfc_vport_delete(struct fc_vport *fc_vport)
 560 {
 561         struct lpfc_nodelist *ndlp = NULL;
 562         struct Scsi_Host *shost = (struct Scsi_Host *) fc_vport->shost;
 563         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 564         struct lpfc_hba   *phba = vport->phba;
 565         long timeout;
 566
 567         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 568                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 569                                  "1812 vport_delete failed: Cannot delete "
 570                                  "physical host\n");
 571                 return VPORT_ERROR;
 572         }
 573
 574         /* If the vport is a static vport fail the deletion. */
 575         if ((vport->vport_flag & STATIC_VPORT) &&
 576                 !(phba->pport->load_flag & FC_UNLOADING)) {
 577                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 578                                  "1837 vport_delete failed: Cannot delete "
 579                                  "static vport.\n");
 580                 return VPORT_ERROR;
 581         }
 582
 583         /*
 584          * If we are not unloading the driver then prevent the vport_delete
 585          * from happening until after this vport's discovery is finished.
 586          */
 587         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 588                 int check_count = 0;
 589                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 590                        vport->port_state > LPFC_VPORT_FAILED &&
 591                        vport->port_state < LPFC_VPORT_READY) {
 592                         check_count++;
 593                         msleep(1000);
 594                 }
 595                 if (vport->port_state > LPFC_VPORT_FAILED &&
 596                     vport->port_state < LPFC_VPORT_READY)
 597                         return -EAGAIN;
 598         }
 599         /*
 600          * This is a bit of a mess.  We want to ensure the shost doesn't get
 601          * torn down until we're done with the embedded lpfc_vport structure.
 602          *
 603          * Beyond holding a reference for this function, we also need a
 604          * reference for outstanding I/O requests we schedule during delete
 605          * processing.  But once we scsi_remove_host() we can no longer obtain
 606          * a reference through scsi_host_get().
 607          *
 608          * So we take two references here.  We release one reference at the
 609          * bottom of the function -- after delinking the vport.  And we
 610          * release the other at the completion of the unreg_vpi that get's
 611          * initiated after we've disposed of all other resources associated
 612          * with the port.
 613          */
 614         if (!scsi_host_get(shost))
 615                 return VPORT_INVAL;
 616         if (!scsi_host_get(shost)) {
 617                 scsi_host_put(shost);
 618                 return VPORT_INVAL;
 619         }
 620         spin_lock_irq(&phba->hbalock);
 621         vport->load_flag |= FC_UNLOADING;
 622         spin_unlock_irq(&phba->hbalock);
 623
 624         lpfc_free_sysfs_attr(vport);
 625
 626         lpfc_debugfs_terminate(vport);
 627
 628         /* Remove FC host and then SCSI host with the vport */
 629         fc_remove_host(lpfc_shost_from_vport(vport));
 630         scsi_remove_host(lpfc_shost_from_vport(vport));
 631
 632         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 633
 634         /* In case of driver unload, we shall not perform fabric logo as the
 635          * worker thread already stopped at this stage and, in this case, we
 636          * can safely skip the fabric logo.
 637          */
 638         if (phba->pport->load_flag & FC_UNLOADING) {
 639                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 640                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 641                     phba->link_state >= LPFC_LINK_UP) {
 642                         /* First look for the Fabric ndlp */
 643                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 644                         if (!ndlp)
 645                                 goto skip_logo;
 646                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
 647                                 ndlp = lpfc_enable_node(vport, ndlp,
 648                                                         NLP_STE_UNUSED_NODE);
 649                                 if (!ndlp)
 650                                         goto skip_logo;
 651                         }
 652                         /* Remove ndlp from vport npld list */
 653                         lpfc_dequeue_node(vport, ndlp);
 654
 655                         /* Indicate free memory when release */
 656                         spin_lock_irq(&phba->ndlp_lock);
 657                         NLP_SET_FREE_REQ(ndlp);
 658                         spin_unlock_irq(&phba->ndlp_lock);
 659                         /* Kick off release ndlp when it can be safely done */
 660                         lpfc_nlp_put(ndlp);
 661                 }
 662                 goto skip_logo;
 663         }
 664
 665         /* Otherwise, we will perform fabric logo as needed */
 666         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 667             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 668             phba->link_state >= LPFC_LINK_UP &&
 669             phba->fc_topology != TOPOLOGY_LOOP) {
 670                 if (vport->cfg_enable_da_id) {
 671                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 672                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
 673                                 while (vport->ct_flags && timeout)
 674                                         timeout = schedule_timeout(timeout);
 675                         else
 676                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 677                                                 LOG_VPORT,
 678                                                 "1829 CT command failed to "
 679                                                 "delete objects on fabric\n");
 680                 }
 681                 /* First look for the Fabric ndlp */
 682                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 683                 if (!ndlp) {
 684                         /* Cannot find existing Fabric ndlp, allocate one */
 685                         ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
 686                         if (!ndlp)
 687                                 goto skip_logo;
 688                         lpfc_nlp_init(vport, ndlp, Fabric_DID);
 689                         /* Indicate free memory when release */
 690                         NLP_SET_FREE_REQ(ndlp);
 691                 } else {
 692                         if (!NLP_CHK_NODE_ACT(ndlp))
 693                                 ndlp = lpfc_enable_node(vport, ndlp,
 694                                                 NLP_STE_UNUSED_NODE);
 695                                 if (!ndlp)
 696                                         goto skip_logo;
 697
 698                         /* Remove ndlp from vport npld list */
 699                         lpfc_dequeue_node(vport, ndlp);
 700                         spin_lock_irq(&phba->ndlp_lock);
 701                         if (!NLP_CHK_FREE_REQ(ndlp))
 702                                 /* Indicate free memory when release */
 703                                 NLP_SET_FREE_REQ(ndlp);
 704                         else {
 705                                 /* Skip this if ndlp is already in free mode */
 706                                 spin_unlock_irq(&phba->ndlp_lock);
 707                                 goto skip_logo;
 708                         }
 709                         spin_unlock_irq(&phba->ndlp_lock);
 710                 }
 711                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED))
 712                         goto skip_logo;
 713                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 714                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 715                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 716                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 717                                 timeout = schedule_timeout(timeout);
 718         }
 719
 720         if (!(phba->pport->load_flag & FC_UNLOADING))
 721                 lpfc_discovery_wait(vport);
 722
 723 skip_logo:
 724         lpfc_cleanup(vport);
 725         lpfc_sli_host_down(vport);
 726
 727         lpfc_stop_vport_timers(vport);
 728
 729         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 730                 lpfc_unreg_all_rpis(vport);
 731                 lpfc_unreg_default_rpis(vport);
 732                 /*
 733                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 734                  * does the scsi_host_put() to release the vport.
 735                  */
 736                 if (lpfc_mbx_unreg_vpi(vport))
 737                         scsi_host_put(shost);
 738         } else
 739                 scsi_host_put(shost);
 740
 741         lpfc_free_vpi(phba, vport->vpi);
 742         vport->work_port_events = 0;
 743         spin_lock_irq(&phba->hbalock);
 744         list_del_init(&vport->listentry);
 745         spin_unlock_irq(&phba->hbalock);
 746         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 747                          "1828 Vport Deleted.\n");
 748         scsi_host_put(shost);
 749         return VPORT_OK;
 750 }
 751
 752 struct lpfc_vport **
 753 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 754 {
 755         struct lpfc_vport *port_iterator;
 756         struct lpfc_vport **vports;
 757         int index = 0;
 758         vports = kzalloc((phba->max_vports + 1) * sizeof(struct lpfc_vport *),
 759                          GFP_KERNEL);
 760         if (vports == NULL)
 761                 return NULL;
 762         spin_lock_irq(&phba->hbalock);
 763         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 764                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 765                         lpfc_printf_vlog(port_iterator, KERN_WARNING, LOG_VPORT,
 766                                          "1801 Create vport work array FAILED: "
 767                                          "cannot do scsi_host_get\n");
 768                         continue;
 769                 }
 770                 vports[index++] = port_iterator;
 771         }
 772         spin_unlock_irq(&phba->hbalock);
 773         return vports;
 774 }
 775
 776 void
 777 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 778 {
 779         int i;
 780         if (vports == NULL)
 781                 return;
 782         for (i = 0; vports[i] != NULL && i <= phba->max_vports; i++)
 783                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 784         kfree(vports);
 785 }
 786
 787
 788 /**
 789  * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
 790  * @vport: Pointer to vport object.
 791  *
 792  * This function resets the statistical data for the vport. This function
 793  * is called with the host_lock held
 794  **/
 795 void
 796 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 797 {
 798         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 799
 800         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 801                 if (!NLP_CHK_NODE_ACT(ndlp))
 802                         continue;
 803                 if (ndlp->lat_data)
 804                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 805                                 sizeof(struct lpfc_scsicmd_bkt));
 806         }
 807 }
 808
 809
 810 /**
 811  * lpfc_alloc_bucket - Allocate data buffer required for statistical data
 812  * @vport: Pointer to vport object.
 813  *
 814  * This function allocates data buffer required for all the FC
 815  * nodes of the vport to collect statistical data.
 816  **/
 817 void
 818 lpfc_alloc_bucket(struct lpfc_vport *vport)
 819 {
 820         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 821
 822         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 823                 if (!NLP_CHK_NODE_ACT(ndlp))
 824                         continue;
 825
 826                 kfree(ndlp->lat_data);
 827                 ndlp->lat_data = NULL;
 828
 829                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 830                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 831                                          sizeof(struct lpfc_scsicmd_bkt),
 832                                          GFP_ATOMIC);
 833
 834                         if (!ndlp->lat_data)
 835                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
 836                                         "0287 lpfc_alloc_bucket failed to "
 837                                         "allocate statistical data buffer DID "
 838                                         "0x%x\n", ndlp->nlp_DID);
 839                 }
 840         }
 841 }
 842
 843 /**
 844  * lpfc_free_bucket - Free data buffer required for statistical data
 845  * @vport: Pointer to vport object.
 846  *
 847  * Th function frees statistical data buffer of all the FC
 848  * nodes of the vport.
 849  **/
 850 void
 851 lpfc_free_bucket(struct lpfc_vport *vport)
 852 {
 853         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 854
 855         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 856                 if (!NLP_CHK_NODE_ACT(ndlp))
 857                         continue;
 858
 859                 kfree(ndlp->lat_data);
 860                 ndlp->lat_data = NULL;
 861         }
 862 }