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