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) 2017-2018 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  *******************************************************************/
  23
  24 #include <linux/blkdev.h>
  25 #include <linux/delay.h>
  26 #include <linux/dma-mapping.h>
  27 #include <linux/idr.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/kthread.h>
  30 #include <linux/pci.h>
  31 #include <linux/slab.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/sched/signal.h>
  34
  35 #include <scsi/scsi.h>
  36 #include <scsi/scsi_device.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_transport_fc.h>
  39
  40 #include "lpfc_hw4.h"
  41 #include "lpfc_hw.h"
  42 #include "lpfc_sli.h"
  43 #include "lpfc_sli4.h"
  44 #include "lpfc_nl.h"
  45 #include "lpfc_disc.h"
  46 #include "lpfc_scsi.h"
  47 #include "lpfc.h"
  48 #include "lpfc_logmsg.h"
  49 #include "lpfc_crtn.h"
  50 #include "lpfc_version.h"
  51 #include "lpfc_vport.h"
  52
  53 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
  54                                  enum fc_vport_state new_state)
  55 {
  56         struct fc_vport *fc_vport = vport->fc_vport;
  57
  58         if (fc_vport) {
  59                 /*
  60                  * When the transport defines fc_vport_set state we will replace
  61                  * this code with the following line
  62                  */
  63                 /* fc_vport_set_state(fc_vport, new_state); */
  64                 if (new_state != FC_VPORT_INITIALIZING)
  65                         fc_vport->vport_last_state = fc_vport->vport_state;
  66                 fc_vport->vport_state = new_state;
  67         }
  68
  69         /* for all the error states we will set the invternal state to FAILED */
  70         switch (new_state) {
  71         case FC_VPORT_NO_FABRIC_SUPP:
  72         case FC_VPORT_NO_FABRIC_RSCS:
  73         case FC_VPORT_FABRIC_LOGOUT:
  74         case FC_VPORT_FABRIC_REJ_WWN:
  75         case FC_VPORT_FAILED:
  76                 vport->port_state = LPFC_VPORT_FAILED;
  77                 break;
  78         case FC_VPORT_LINKDOWN:
  79                 vport->port_state = LPFC_VPORT_UNKNOWN;
  80                 break;
  81         default:
  82                 /* do nothing */
  83                 break;
  84         }
  85 }
  86
  87 int
  88 lpfc_alloc_vpi(struct lpfc_hba *phba)
  89 {
  90         unsigned long vpi;
  91
  92         spin_lock_irq(&phba->hbalock);
  93         /* Start at bit 1 because vpi zero is reserved for the physical port */
  94         vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
  95         if (vpi > phba->max_vpi)
  96                 vpi = 0;
  97         else
  98                 set_bit(vpi, phba->vpi_bmask);
  99         if (phba->sli_rev == LPFC_SLI_REV4)
 100                 phba->sli4_hba.max_cfg_param.vpi_used++;
 101         spin_unlock_irq(&phba->hbalock);
 102         return vpi;
 103 }
 104
 105 static void
 106 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
 107 {
 108         if (vpi == 0)
 109                 return;
 110         spin_lock_irq(&phba->hbalock);
 111         clear_bit(vpi, phba->vpi_bmask);
 112         if (phba->sli_rev == LPFC_SLI_REV4)
 113                 phba->sli4_hba.max_cfg_param.vpi_used--;
 114         spin_unlock_irq(&phba->hbalock);
 115 }
 116
 117 static int
 118 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
 119 {
 120         LPFC_MBOXQ_t *pmb;
 121         MAILBOX_t *mb;
 122         struct lpfc_dmabuf *mp;
 123         int  rc;
 124
 125         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 126         if (!pmb) {
 127                 return -ENOMEM;
 128         }
 129         mb = &pmb->u.mb;
 130
 131         rc = lpfc_read_sparam(phba, pmb, vport->vpi);
 132         if (rc) {
 133                 mempool_free(pmb, phba->mbox_mem_pool);
 134                 return -ENOMEM;
 135         }
 136
 137         /*
 138          * Grab buffer pointer and clear context1 so we can use
 139          * lpfc_sli_issue_box_wait
 140          */
 141         mp = (struct lpfc_dmabuf *) pmb->context1;
 142         pmb->context1 = NULL;
 143
 144         pmb->vport = vport;
 145         rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
 146         if (rc != MBX_SUCCESS) {
 147                 if (signal_pending(current)) {
 148                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 149                                          "1830 Signal aborted mbxCmd x%x\n",
 150                                          mb->mbxCommand);
 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 -EINTR;
 156                 } else {
 157                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 158                                          "1818 VPort failed init, mbxCmd x%x "
 159                                          "READ_SPARM mbxStatus x%x, rc = x%x\n",
 160                                          mb->mbxCommand, mb->mbxStatus, rc);
 161                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 162                         kfree(mp);
 163                         if (rc != MBX_TIMEOUT)
 164                                 mempool_free(pmb, phba->mbox_mem_pool);
 165                         return -EIO;
 166                 }
 167         }
 168
 169         memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
 170         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 171                sizeof (struct lpfc_name));
 172         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 173                sizeof (struct lpfc_name));
 174
 175         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 176         kfree(mp);
 177         mempool_free(pmb, phba->mbox_mem_pool);
 178
 179         return 0;
 180 }
 181
 182 static int
 183 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
 184                       const char *name_type)
 185 {
 186                                 /* ensure that IEEE format 1 addresses
 187                                  * contain zeros in bits 59-48
 188                                  */
 189         if (!((wwn->u.wwn[0] >> 4) == 1 &&
 190               ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
 191                 return 1;
 192
 193         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 194                         "1822 Invalid %s: %02x:%02x:%02x:%02x:"
 195                         "%02x:%02x:%02x:%02x\n",
 196                         name_type,
 197                         wwn->u.wwn[0], wwn->u.wwn[1],
 198                         wwn->u.wwn[2], wwn->u.wwn[3],
 199                         wwn->u.wwn[4], wwn->u.wwn[5],
 200                         wwn->u.wwn[6], wwn->u.wwn[7]);
 201         return 0;
 202 }
 203
 204 static int
 205 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
 206 {
 207         struct lpfc_vport *vport;
 208         unsigned long flags;
 209
 210         spin_lock_irqsave(&phba->hbalock, flags);
 211         list_for_each_entry(vport, &phba->port_list, listentry) {
 212                 if (vport == new_vport)
 213                         continue;
 214                 /* If they match, return not unique */
 215                 if (memcmp(&vport->fc_sparam.portName,
 216                            &new_vport->fc_sparam.portName,
 217                            sizeof(struct lpfc_name)) == 0) {
 218                         spin_unlock_irqrestore(&phba->hbalock, flags);
 219                         return 0;
 220                 }
 221         }
 222         spin_unlock_irqrestore(&phba->hbalock, flags);
 223         return 1;
 224 }
 225
 226 /**
 227  * lpfc_discovery_wait - Wait for driver discovery to quiesce
 228  * @vport: The virtual port for which this call is being executed.
 229  *
 230  * This driver calls this routine specifically from lpfc_vport_delete
 231  * to enforce a synchronous execution of vport
 232  * delete relative to discovery activities.  The
 233  * lpfc_vport_delete routine should not return until it
 234  * can reasonably guarantee that discovery has quiesced.
 235  * Post FDISC LOGO, the driver must wait until its SAN teardown is
 236  * complete and all resources recovered before allowing
 237  * cleanup.
 238  *
 239  * This routine does not require any locks held.
 240  **/
 241 static void lpfc_discovery_wait(struct lpfc_vport *vport)
 242 {
 243         struct lpfc_hba *phba = vport->phba;
 244         uint32_t wait_flags = 0;
 245         unsigned long wait_time_max;
 246         unsigned long start_time;
 247
 248         wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
 249                      FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
 250
 251         /*
 252          * The time constraint on this loop is a balance between the
 253          * fabric RA_TOV value and dev_loss tmo.  The driver's
 254          * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
 255          */
 256         wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
 257         wait_time_max += jiffies;
 258         start_time = jiffies;
 259         while (time_before(jiffies, wait_time_max)) {
 260                 if ((vport->num_disc_nodes > 0)    ||
 261                     (vport->fc_flag & wait_flags)  ||
 262                     ((vport->port_state > LPFC_VPORT_FAILED) &&
 263                      (vport->port_state < LPFC_VPORT_READY))) {
 264                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 265                                         "1833 Vport discovery quiesce Wait:"
 266                                         " state x%x fc_flags x%x"
 267                                         " num_nodes x%x, waiting 1000 msecs"
 268                                         " total wait msecs x%x\n",
 269                                         vport->port_state, vport->fc_flag,
 270                                         vport->num_disc_nodes,
 271                                         jiffies_to_msecs(jiffies - start_time));
 272                         msleep(1000);
 273                 } else {
 274                         /* Base case.  Wait variants satisfied.  Break out */
 275                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 276                                          "1834 Vport discovery quiesced:"
 277                                          " state x%x fc_flags x%x"
 278                                          " wait msecs x%x\n",
 279                                          vport->port_state, vport->fc_flag,
 280                                          jiffies_to_msecs(jiffies
 281                                                 - start_time));
 282                         break;
 283                 }
 284         }
 285
 286         if (time_after(jiffies, wait_time_max))
 287                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 288                                 "1835 Vport discovery quiesce failed:"
 289                                 " state x%x fc_flags x%x wait msecs x%x\n",
 290                                 vport->port_state, vport->fc_flag,
 291                                 jiffies_to_msecs(jiffies - start_time));
 292 }
 293
 294 int
 295 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 296 {
 297         struct lpfc_nodelist *ndlp;
 298         struct Scsi_Host *shost = fc_vport->shost;
 299         struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
 300         struct lpfc_hba   *phba = pport->phba;
 301         struct lpfc_vport *vport = NULL;
 302         int instance;
 303         int vpi;
 304         int rc = VPORT_ERROR;
 305         int status;
 306
 307         if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
 308                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 309                                 "1808 Create VPORT failed: "
 310                                 "NPIV is not enabled: SLImode:%d\n",
 311                                 phba->sli_rev);
 312                 rc = VPORT_INVAL;
 313                 goto error_out;
 314         }
 315
 316         /* NPIV is not supported if HBA has NVME enabled */
 317         if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME) {
 318                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 319                                 "3189 Create VPORT failed: "
 320                                 "NPIV is not supported on NVME\n");
 321                 rc = VPORT_INVAL;
 322                 goto error_out;
 323         }
 324
 325         vpi = lpfc_alloc_vpi(phba);
 326         if (vpi == 0) {
 327                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 328                                 "1809 Create VPORT failed: "
 329                                 "Max VPORTs (%d) exceeded\n",
 330                                 phba->max_vpi);
 331                 rc = VPORT_NORESOURCES;
 332                 goto error_out;
 333         }
 334
 335         /* Assign an unused board number */
 336         if ((instance = lpfc_get_instance()) < 0) {
 337                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 338                                 "1810 Create VPORT failed: Cannot get "
 339                                 "instance number\n");
 340                 lpfc_free_vpi(phba, vpi);
 341                 rc = VPORT_NORESOURCES;
 342                 goto error_out;
 343         }
 344
 345         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
 346         if (!vport) {
 347                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 348                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
 349                 lpfc_free_vpi(phba, vpi);
 350                 rc = VPORT_NORESOURCES;
 351                 goto error_out;
 352         }
 353
 354         vport->vpi = vpi;
 355         lpfc_debugfs_initialize(vport);
 356
 357         if ((status = lpfc_vport_sparm(phba, vport))) {
 358                 if (status == -EINTR) {
 359                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 360                                          "1831 Create VPORT Interrupted.\n");
 361                         rc = VPORT_ERROR;
 362                 } else {
 363                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 364                                          "1813 Create VPORT failed. "
 365                                          "Cannot get sparam\n");
 366                         rc = VPORT_NORESOURCES;
 367                 }
 368                 lpfc_free_vpi(phba, vpi);
 369                 destroy_port(vport);
 370                 goto error_out;
 371         }
 372
 373         u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 374         u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 375
 376         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 377         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 378
 379         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 380             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 381                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 382                                  "1821 Create VPORT failed. "
 383                                  "Invalid WWN format\n");
 384                 lpfc_free_vpi(phba, vpi);
 385                 destroy_port(vport);
 386                 rc = VPORT_INVAL;
 387                 goto error_out;
 388         }
 389
 390         if (!lpfc_unique_wwpn(phba, vport)) {
 391                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 392                                  "1823 Create VPORT failed. "
 393                                  "Duplicate WWN on HBA\n");
 394                 lpfc_free_vpi(phba, vpi);
 395                 destroy_port(vport);
 396                 rc = VPORT_INVAL;
 397                 goto error_out;
 398         }
 399
 400         /* Create binary sysfs attribute for vport */
 401         lpfc_alloc_sysfs_attr(vport);
 402
 403         /* Set the DFT_LUN_Q_DEPTH accordingly */
 404         vport->cfg_lun_queue_depth  = phba->pport->cfg_lun_queue_depth;
 405
 406         *(struct lpfc_vport **)fc_vport->dd_data = vport;
 407         vport->fc_vport = fc_vport;
 408
 409         /* At this point we are fully registered with SCSI Layer.  */
 410         vport->load_flag |= FC_ALLOW_FDMI;
 411         if (phba->cfg_enable_SmartSAN ||
 412             (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
 413                 /* Setup appropriate attribute masks */
 414                 vport->fdmi_hba_mask = phba->pport->fdmi_hba_mask;
 415                 vport->fdmi_port_mask = phba->pport->fdmi_port_mask;
 416         }
 417
 418         if ((phba->nvmet_support == 0) &&
 419             ((phba->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
 420              (phba->cfg_enable_fc4_type == LPFC_ENABLE_NVME))) {
 421                 /* Create NVME binding with nvme_fc_transport. This
 422                  * ensures the vport is initialized.
 423                  */
 424                 rc = lpfc_nvme_create_localport(vport);
 425                 if (rc) {
 426                         lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 427                                         "6003 %s status x%x\n",
 428                                         "NVME registration failed, ",
 429                                         rc);
 430                         goto error_out;
 431                 }
 432         }
 433
 434         /*
 435          * In SLI4, the vpi must be activated before it can be used
 436          * by the port.
 437          */
 438         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 439             (pport->fc_flag & FC_VFI_REGISTERED)) {
 440                 rc = lpfc_sli4_init_vpi(vport);
 441                 if (rc) {
 442                         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 443                                         "1838 Failed to INIT_VPI on vpi %d "
 444                                         "status %d\n", vpi, rc);
 445                         rc = VPORT_NORESOURCES;
 446                         lpfc_free_vpi(phba, vpi);
 447                         goto error_out;
 448                 }
 449         } else if (phba->sli_rev == LPFC_SLI_REV4) {
 450                 /*
 451                  * Driver cannot INIT_VPI now. Set the flags to
 452                  * init_vpi when reg_vfi complete.
 453                  */
 454                 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 455                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 456                 rc = VPORT_OK;
 457                 goto out;
 458         }
 459
 460         if ((phba->link_state < LPFC_LINK_UP) ||
 461             (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
 462             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 463                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 464                 rc = VPORT_OK;
 465                 goto out;
 466         }
 467
 468         if (disable) {
 469                 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 470                 rc = VPORT_OK;
 471                 goto out;
 472         }
 473
 474         /* Use the Physical nodes Fabric NDLP to determine if the link is
 475          * up and ready to FDISC.
 476          */
 477         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 478         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 479             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 480                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 481                         lpfc_set_disctmo(vport);
 482                         lpfc_initial_fdisc(vport);
 483                 } else {
 484                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 485                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 486                                          "0262 No NPIV Fabric support\n");
 487                 }
 488         } else {
 489                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 490         }
 491         rc = VPORT_OK;
 492
 493 out:
 494         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 495                         "1825 Vport Created.\n");
 496         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 497 error_out:
 498         return rc;
 499 }
 500
 501 static int
 502 disable_vport(struct fc_vport *fc_vport)
 503 {
 504         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 505         struct lpfc_hba   *phba = vport->phba;
 506         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 507         long timeout;
 508         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 509
 510         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 511         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 512             && phba->link_state >= LPFC_LINK_UP) {
 513                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 514                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 515                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 516                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 517                                 timeout = schedule_timeout(timeout);
 518         }
 519
 520         lpfc_sli_host_down(vport);
 521
 522         /* Mark all nodes for discovery so we can remove them by
 523          * calling lpfc_cleanup_rpis(vport, 1)
 524          */
 525         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 526                 if (!NLP_CHK_NODE_ACT(ndlp))
 527                         continue;
 528                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 529                         continue;
 530                 lpfc_disc_state_machine(vport, ndlp, NULL,
 531                                         NLP_EVT_DEVICE_RECOVERY);
 532         }
 533         lpfc_cleanup_rpis(vport, 1);
 534
 535         lpfc_stop_vport_timers(vport);
 536         lpfc_unreg_all_rpis(vport);
 537         lpfc_unreg_default_rpis(vport);
 538         /*
 539          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 540          * scsi_host_put() to release the vport.
 541          */
 542         lpfc_mbx_unreg_vpi(vport);
 543         spin_lock_irq(shost->host_lock);
 544         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 545         spin_unlock_irq(shost->host_lock);
 546
 547         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 548         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 549                          "1826 Vport Disabled.\n");
 550         return VPORT_OK;
 551 }
 552
 553 static int
 554 enable_vport(struct fc_vport *fc_vport)
 555 {
 556         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 557         struct lpfc_hba   *phba = vport->phba;
 558         struct lpfc_nodelist *ndlp = NULL;
 559         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 560
 561         if ((phba->link_state < LPFC_LINK_UP) ||
 562             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 563                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 564                 return VPORT_OK;
 565         }
 566
 567         spin_lock_irq(shost->host_lock);
 568         vport->load_flag |= FC_LOADING;
 569         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
 570                 spin_unlock_irq(shost->host_lock);
 571                 lpfc_issue_init_vpi(vport);
 572                 goto out;
 573         }
 574
 575         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 576         spin_unlock_irq(shost->host_lock);
 577
 578         /* Use the Physical nodes Fabric NDLP to determine if the link is
 579          * up and ready to FDISC.
 580          */
 581         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 582         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 583             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 584                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 585                         lpfc_set_disctmo(vport);
 586                         lpfc_initial_fdisc(vport);
 587                 } else {
 588                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 589                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 590                                          "0264 No NPIV Fabric support\n");
 591                 }
 592         } else {
 593                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 594         }
 595
 596 out:
 597         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 598                          "1827 Vport Enabled.\n");
 599         return VPORT_OK;
 600 }
 601
 602 int
 603 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 604 {
 605         if (disable)
 606                 return disable_vport(fc_vport);
 607         else
 608                 return enable_vport(fc_vport);
 609 }
 610
 611
 612 int
 613 lpfc_vport_delete(struct fc_vport *fc_vport)
 614 {
 615         struct lpfc_nodelist *ndlp = NULL;
 616         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 617         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 618         struct lpfc_hba   *phba = vport->phba;
 619         long timeout;
 620         bool ns_ndlp_referenced = false;
 621
 622         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 623                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 624                                  "1812 vport_delete failed: Cannot delete "
 625                                  "physical host\n");
 626                 return VPORT_ERROR;
 627         }
 628
 629         /* If the vport is a static vport fail the deletion. */
 630         if ((vport->vport_flag & STATIC_VPORT) &&
 631                 !(phba->pport->load_flag & FC_UNLOADING)) {
 632                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 633                                  "1837 vport_delete failed: Cannot delete "
 634                                  "static vport.\n");
 635                 return VPORT_ERROR;
 636         }
 637         spin_lock_irq(&phba->hbalock);
 638         vport->load_flag |= FC_UNLOADING;
 639         spin_unlock_irq(&phba->hbalock);
 640         /*
 641          * If we are not unloading the driver then prevent the vport_delete
 642          * from happening until after this vport's discovery is finished.
 643          */
 644         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 645                 int check_count = 0;
 646                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 647                        vport->port_state > LPFC_VPORT_FAILED &&
 648                        vport->port_state < LPFC_VPORT_READY) {
 649                         check_count++;
 650                         msleep(1000);
 651                 }
 652                 if (vport->port_state > LPFC_VPORT_FAILED &&
 653                     vport->port_state < LPFC_VPORT_READY)
 654                         return -EAGAIN;
 655         }
 656         /*
 657          * This is a bit of a mess.  We want to ensure the shost doesn't get
 658          * torn down until we're done with the embedded lpfc_vport structure.
 659          *
 660          * Beyond holding a reference for this function, we also need a
 661          * reference for outstanding I/O requests we schedule during delete
 662          * processing.  But once we scsi_remove_host() we can no longer obtain
 663          * a reference through scsi_host_get().
 664          *
 665          * So we take two references here.  We release one reference at the
 666          * bottom of the function -- after delinking the vport.  And we
 667          * release the other at the completion of the unreg_vpi that get's
 668          * initiated after we've disposed of all other resources associated
 669          * with the port.
 670          */
 671         if (!scsi_host_get(shost))
 672                 return VPORT_INVAL;
 673         if (!scsi_host_get(shost)) {
 674                 scsi_host_put(shost);
 675                 return VPORT_INVAL;
 676         }
 677         lpfc_free_sysfs_attr(vport);
 678
 679         lpfc_debugfs_terminate(vport);
 680
 681         /*
 682          * The call to fc_remove_host might release the NameServer ndlp. Since
 683          * we might need to use the ndlp to send the DA_ID CT command,
 684          * increment the reference for the NameServer ndlp to prevent it from
 685          * being released.
 686          */
 687         ndlp = lpfc_findnode_did(vport, NameServer_DID);
 688         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 689                 lpfc_nlp_get(ndlp);
 690                 ns_ndlp_referenced = true;
 691         }
 692
 693         /* Remove FC host and then SCSI host with the vport */
 694         fc_remove_host(shost);
 695         scsi_remove_host(shost);
 696
 697         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 698
 699         /* In case of driver unload, we shall not perform fabric logo as the
 700          * worker thread already stopped at this stage and, in this case, we
 701          * can safely skip the fabric logo.
 702          */
 703         if (phba->pport->load_flag & FC_UNLOADING) {
 704                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 705                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 706                     phba->link_state >= LPFC_LINK_UP) {
 707                         /* First look for the Fabric ndlp */
 708                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 709                         if (!ndlp)
 710                                 goto skip_logo;
 711                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
 712                                 ndlp = lpfc_enable_node(vport, ndlp,
 713                                                         NLP_STE_UNUSED_NODE);
 714                                 if (!ndlp)
 715                                         goto skip_logo;
 716                         }
 717                         /* Remove ndlp from vport npld list */
 718                         lpfc_dequeue_node(vport, ndlp);
 719
 720                         /* Indicate free memory when release */
 721                         spin_lock_irq(&phba->ndlp_lock);
 722                         NLP_SET_FREE_REQ(ndlp);
 723                         spin_unlock_irq(&phba->ndlp_lock);
 724                         /* Kick off release ndlp when it can be safely done */
 725                         lpfc_nlp_put(ndlp);
 726                 }
 727                 goto skip_logo;
 728         }
 729
 730         /* Otherwise, we will perform fabric logo as needed */
 731         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 732             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 733             phba->link_state >= LPFC_LINK_UP &&
 734             phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
 735                 if (vport->cfg_enable_da_id) {
 736                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 737                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
 738                                 while (vport->ct_flags && timeout)
 739                                         timeout = schedule_timeout(timeout);
 740                         else
 741                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 742                                                 LOG_VPORT,
 743                                                 "1829 CT command failed to "
 744                                                 "delete objects on fabric\n");
 745                 }
 746                 /* First look for the Fabric ndlp */
 747                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 748                 if (!ndlp) {
 749                         /* Cannot find existing Fabric ndlp, allocate one */
 750                         ndlp = lpfc_nlp_init(vport, Fabric_DID);
 751                         if (!ndlp)
 752                                 goto skip_logo;
 753                         /* Indicate free memory when release */
 754                         NLP_SET_FREE_REQ(ndlp);
 755                 } else {
 756                         if (!NLP_CHK_NODE_ACT(ndlp)) {
 757                                 ndlp = lpfc_enable_node(vport, ndlp,
 758                                                 NLP_STE_UNUSED_NODE);
 759                                 if (!ndlp)
 760                                         goto skip_logo;
 761                         }
 762
 763                         /* Remove ndlp from vport list */
 764                         lpfc_dequeue_node(vport, ndlp);
 765                         spin_lock_irq(&phba->ndlp_lock);
 766                         if (!NLP_CHK_FREE_REQ(ndlp))
 767                                 /* Indicate free memory when release */
 768                                 NLP_SET_FREE_REQ(ndlp);
 769                         else {
 770                                 /* Skip this if ndlp is already in free mode */
 771                                 spin_unlock_irq(&phba->ndlp_lock);
 772                                 goto skip_logo;
 773                         }
 774                         spin_unlock_irq(&phba->ndlp_lock);
 775                 }
 776
 777                 /*
 778                  * If the vpi is not registered, then a valid FDISC doesn't
 779                  * exist and there is no need for a ELS LOGO.  Just cleanup
 780                  * the ndlp.
 781                  */
 782                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED)) {
 783                         lpfc_nlp_put(ndlp);
 784                         goto skip_logo;
 785                 }
 786
 787                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 788                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 789                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 790                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 791                                 timeout = schedule_timeout(timeout);
 792         }
 793
 794         if (!(phba->pport->load_flag & FC_UNLOADING))
 795                 lpfc_discovery_wait(vport);
 796
 797 skip_logo:
 798
 799         /*
 800          * If the NameServer ndlp has been incremented to allow the DA_ID CT
 801          * command to be sent, decrement the ndlp now.
 802          */
 803         if (ns_ndlp_referenced) {
 804                 ndlp = lpfc_findnode_did(vport, NameServer_DID);
 805                 lpfc_nlp_put(ndlp);
 806         }
 807
 808         lpfc_cleanup(vport);
 809         lpfc_sli_host_down(vport);
 810
 811         lpfc_stop_vport_timers(vport);
 812
 813         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 814                 lpfc_unreg_all_rpis(vport);
 815                 lpfc_unreg_default_rpis(vport);
 816                 /*
 817                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 818                  * does the scsi_host_put() to release the vport.
 819                  */
 820                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED) ||
 821                                 lpfc_mbx_unreg_vpi(vport))
 822                         scsi_host_put(shost);
 823         } else
 824                 scsi_host_put(shost);
 825
 826         lpfc_free_vpi(phba, vport->vpi);
 827         vport->work_port_events = 0;
 828         spin_lock_irq(&phba->hbalock);
 829         list_del_init(&vport->listentry);
 830         spin_unlock_irq(&phba->hbalock);
 831         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 832                          "1828 Vport Deleted.\n");
 833         scsi_host_put(shost);
 834         return VPORT_OK;
 835 }
 836
 837 struct lpfc_vport **
 838 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 839 {
 840         struct lpfc_vport *port_iterator;
 841         struct lpfc_vport **vports;
 842         int index = 0;
 843         vports = kcalloc(phba->max_vports + 1, sizeof(struct lpfc_vport *),
 844                          GFP_KERNEL);
 845         if (vports == NULL)
 846                 return NULL;
 847         spin_lock_irq(&phba->hbalock);
 848         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 849                 if (port_iterator->load_flag & FC_UNLOADING)
 850                         continue;
 851                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 852                         lpfc_printf_vlog(port_iterator, KERN_ERR, LOG_VPORT,
 853                                          "1801 Create vport work array FAILED: "
 854                                          "cannot do scsi_host_get\n");
 855                         continue;
 856                 }
 857                 vports[index++] = port_iterator;
 858         }
 859         spin_unlock_irq(&phba->hbalock);
 860         return vports;
 861 }
 862
 863 void
 864 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 865 {
 866         int i;
 867         if (vports == NULL)
 868                 return;
 869         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
 870                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 871         kfree(vports);
 872 }
 873
 874
 875 /**
 876  * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
 877  * @vport: Pointer to vport object.
 878  *
 879  * This function resets the statistical data for the vport. This function
 880  * is called with the host_lock held
 881  **/
 882 void
 883 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 884 {
 885         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 886
 887         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 888                 if (!NLP_CHK_NODE_ACT(ndlp))
 889                         continue;
 890                 if (ndlp->lat_data)
 891                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 892                                 sizeof(struct lpfc_scsicmd_bkt));
 893         }
 894 }
 895
 896
 897 /**
 898  * lpfc_alloc_bucket - Allocate data buffer required for statistical data
 899  * @vport: Pointer to vport object.
 900  *
 901  * This function allocates data buffer required for all the FC
 902  * nodes of the vport to collect statistical data.
 903  **/
 904 void
 905 lpfc_alloc_bucket(struct lpfc_vport *vport)
 906 {
 907         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 908
 909         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 910                 if (!NLP_CHK_NODE_ACT(ndlp))
 911                         continue;
 912
 913                 kfree(ndlp->lat_data);
 914                 ndlp->lat_data = NULL;
 915
 916                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 917                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 918                                          sizeof(struct lpfc_scsicmd_bkt),
 919                                          GFP_ATOMIC);
 920
 921                         if (!ndlp->lat_data)
 922                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
 923                                         "0287 lpfc_alloc_bucket failed to "
 924                                         "allocate statistical data buffer DID "
 925                                         "0x%x\n", ndlp->nlp_DID);
 926                 }
 927         }
 928 }
 929
 930 /**
 931  * lpfc_free_bucket - Free data buffer required for statistical data
 932  * @vport: Pointer to vport object.
 933  *
 934  * Th function frees statistical data buffer of all the FC
 935  * nodes of the vport.
 936  **/
 937 void
 938 lpfc_free_bucket(struct lpfc_vport *vport)
 939 {
 940         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 941
 942         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 943                 if (!NLP_CHK_NODE_ACT(ndlp))
 944                         continue;
 945
 946                 kfree(ndlp->lat_data);
 947                 ndlp->lat_data = NULL;
 948         }
 949 }