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) 2017-2022 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          * Wait for the read_sparams mailbox to complete.  Driver needs
 139          * this per vport to start the FDISC.  If the mailbox fails,
 140          * just cleanup and return an error unless the failure is a
 141          * mailbox timeout.  For MBX_TIMEOUT, allow the default
 142          * mbox completion handler to take care of the cleanup.  This
 143          * is safe as the mailbox command isn't one that triggers
 144          * another mailbox.
 145          */
 146         pmb->vport = vport;
 147         rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
 148         if (rc != MBX_SUCCESS) {
 149                 if (signal_pending(current)) {
 150                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 151                                          "1830 Signal aborted mbxCmd x%x\n",
 152                                          mb->mbxCommand);
 153                         if (rc != MBX_TIMEOUT)
 154                                 lpfc_mbox_rsrc_cleanup(phba, pmb,
 155                                                        MBOX_THD_UNLOCKED);
 156                         return -EINTR;
 157                 } else {
 158                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 159                                          "1818 VPort failed init, mbxCmd x%x "
 160                                          "READ_SPARM mbxStatus x%x, rc = x%x\n",
 161                                          mb->mbxCommand, mb->mbxStatus, rc);
 162                         if (rc != MBX_TIMEOUT)
 163                                 lpfc_mbox_rsrc_cleanup(phba, pmb,
 164                                                        MBOX_THD_UNLOCKED);
 165                         return -EIO;
 166                 }
 167         }
 168
 169         mp = (struct lpfc_dmabuf *)pmb->ctx_buf;
 170         memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
 171         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 172                sizeof (struct lpfc_name));
 173         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 174                sizeof (struct lpfc_name));
 175         lpfc_mbox_rsrc_cleanup(phba, pmb, MBOX_THD_UNLOCKED);
 176         return 0;
 177 }
 178
 179 static int
 180 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
 181                       const char *name_type)
 182 {
 183                                 /* ensure that IEEE format 1 addresses
 184                                  * contain zeros in bits 59-48
 185                                  */
 186         if (!((wwn->u.wwn[0] >> 4) == 1 &&
 187               ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
 188                 return 1;
 189
 190         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 191                         "1822 Invalid %s: %02x:%02x:%02x:%02x:"
 192                         "%02x:%02x:%02x:%02x\n",
 193                         name_type,
 194                         wwn->u.wwn[0], wwn->u.wwn[1],
 195                         wwn->u.wwn[2], wwn->u.wwn[3],
 196                         wwn->u.wwn[4], wwn->u.wwn[5],
 197                         wwn->u.wwn[6], wwn->u.wwn[7]);
 198         return 0;
 199 }
 200
 201 static int
 202 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
 203 {
 204         struct lpfc_vport *vport;
 205         unsigned long flags;
 206
 207         spin_lock_irqsave(&phba->port_list_lock, flags);
 208         list_for_each_entry(vport, &phba->port_list, listentry) {
 209                 if (vport == new_vport)
 210                         continue;
 211                 /* If they match, return not unique */
 212                 if (memcmp(&vport->fc_sparam.portName,
 213                            &new_vport->fc_sparam.portName,
 214                            sizeof(struct lpfc_name)) == 0) {
 215                         spin_unlock_irqrestore(&phba->port_list_lock, flags);
 216                         return 0;
 217                 }
 218         }
 219         spin_unlock_irqrestore(&phba->port_list_lock, flags);
 220         return 1;
 221 }
 222
 223 /**
 224  * lpfc_discovery_wait - Wait for driver discovery to quiesce
 225  * @vport: The virtual port for which this call is being executed.
 226  *
 227  * This driver calls this routine specifically from lpfc_vport_delete
 228  * to enforce a synchronous execution of vport
 229  * delete relative to discovery activities.  The
 230  * lpfc_vport_delete routine should not return until it
 231  * can reasonably guarantee that discovery has quiesced.
 232  * Post FDISC LOGO, the driver must wait until its SAN teardown is
 233  * complete and all resources recovered before allowing
 234  * cleanup.
 235  *
 236  * This routine does not require any locks held.
 237  **/
 238 static void lpfc_discovery_wait(struct lpfc_vport *vport)
 239 {
 240         struct lpfc_hba *phba = vport->phba;
 241         uint32_t wait_flags = 0;
 242         unsigned long wait_time_max;
 243         unsigned long start_time;
 244
 245         wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
 246                      FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
 247
 248         /*
 249          * The time constraint on this loop is a balance between the
 250          * fabric RA_TOV value and dev_loss tmo.  The driver's
 251          * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
 252          */
 253         wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
 254         wait_time_max += jiffies;
 255         start_time = jiffies;
 256         while (time_before(jiffies, wait_time_max)) {
 257                 if ((vport->num_disc_nodes > 0)    ||
 258                     (vport->fc_flag & wait_flags)  ||
 259                     ((vport->port_state > LPFC_VPORT_FAILED) &&
 260                      (vport->port_state < LPFC_VPORT_READY))) {
 261                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 262                                         "1833 Vport discovery quiesce Wait:"
 263                                         " state x%x fc_flags x%x"
 264                                         " num_nodes x%x, waiting 1000 msecs"
 265                                         " total wait msecs x%x\n",
 266                                         vport->port_state, vport->fc_flag,
 267                                         vport->num_disc_nodes,
 268                                         jiffies_to_msecs(jiffies - start_time));
 269                         msleep(1000);
 270                 } else {
 271                         /* Base case.  Wait variants satisfied.  Break out */
 272                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 273                                          "1834 Vport discovery quiesced:"
 274                                          " state x%x fc_flags x%x"
 275                                          " wait msecs x%x\n",
 276                                          vport->port_state, vport->fc_flag,
 277                                          jiffies_to_msecs(jiffies
 278                                                 - start_time));
 279                         break;
 280                 }
 281         }
 282
 283         if (time_after(jiffies, wait_time_max))
 284                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 285                                  "1835 Vport discovery quiesce failed:"
 286                                  " state x%x fc_flags x%x wait msecs x%x\n",
 287                                  vport->port_state, vport->fc_flag,
 288                                  jiffies_to_msecs(jiffies - start_time));
 289 }
 290
 291 int
 292 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 293 {
 294         struct lpfc_nodelist *ndlp;
 295         struct Scsi_Host *shost = fc_vport->shost;
 296         struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
 297         struct lpfc_hba   *phba = pport->phba;
 298         struct lpfc_vport *vport = NULL;
 299         int instance;
 300         int vpi;
 301         int rc = VPORT_ERROR;
 302         int status;
 303
 304         if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
 305                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 306                                 "1808 Create VPORT failed: "
 307                                 "NPIV is not enabled: SLImode:%d\n",
 308                                 phba->sli_rev);
 309                 rc = VPORT_INVAL;
 310                 goto error_out;
 311         }
 312
 313         /* NPIV is not supported if HBA has NVME Target enabled */
 314         if (phba->nvmet_support) {
 315                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 316                                 "3189 Create VPORT failed: "
 317                                 "NPIV is not supported on NVME Target\n");
 318                 rc = VPORT_INVAL;
 319                 goto error_out;
 320         }
 321
 322         vpi = lpfc_alloc_vpi(phba);
 323         if (vpi == 0) {
 324                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 325                                 "1809 Create VPORT failed: "
 326                                 "Max VPORTs (%d) exceeded\n",
 327                                 phba->max_vpi);
 328                 rc = VPORT_NORESOURCES;
 329                 goto error_out;
 330         }
 331
 332         /* Assign an unused board number */
 333         if ((instance = lpfc_get_instance()) < 0) {
 334                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 335                                 "1810 Create VPORT failed: Cannot get "
 336                                 "instance number\n");
 337                 lpfc_free_vpi(phba, vpi);
 338                 rc = VPORT_NORESOURCES;
 339                 goto error_out;
 340         }
 341
 342         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
 343         if (!vport) {
 344                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 345                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
 346                 lpfc_free_vpi(phba, vpi);
 347                 rc = VPORT_NORESOURCES;
 348                 goto error_out;
 349         }
 350
 351         vport->vpi = vpi;
 352         lpfc_debugfs_initialize(vport);
 353
 354         if ((status = lpfc_vport_sparm(phba, vport))) {
 355                 if (status == -EINTR) {
 356                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 357                                          "1831 Create VPORT Interrupted.\n");
 358                         rc = VPORT_ERROR;
 359                 } else {
 360                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 361                                          "1813 Create VPORT failed. "
 362                                          "Cannot get sparam\n");
 363                         rc = VPORT_NORESOURCES;
 364                 }
 365                 lpfc_free_vpi(phba, vpi);
 366                 destroy_port(vport);
 367                 goto error_out;
 368         }
 369
 370         u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 371         u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 372
 373         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 374         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 375
 376         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 377             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 378                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 379                                  "1821 Create VPORT failed. "
 380                                  "Invalid WWN format\n");
 381                 lpfc_free_vpi(phba, vpi);
 382                 destroy_port(vport);
 383                 rc = VPORT_INVAL;
 384                 goto error_out;
 385         }
 386
 387         if (!lpfc_unique_wwpn(phba, vport)) {
 388                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 389                                  "1823 Create VPORT failed. "
 390                                  "Duplicate WWN on HBA\n");
 391                 lpfc_free_vpi(phba, vpi);
 392                 destroy_port(vport);
 393                 rc = VPORT_INVAL;
 394                 goto error_out;
 395         }
 396
 397         /* Create binary sysfs attribute for vport */
 398         lpfc_alloc_sysfs_attr(vport);
 399
 400         /* Set the DFT_LUN_Q_DEPTH accordingly */
 401         vport->cfg_lun_queue_depth  = phba->pport->cfg_lun_queue_depth;
 402
 403         /* Only the physical port can support NVME for now */
 404         vport->cfg_enable_fc4_type = LPFC_ENABLE_FCP;
 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         /*
 419          * In SLI4, the vpi must be activated before it can be used
 420          * by the port.
 421          */
 422         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 423             (pport->fc_flag & FC_VFI_REGISTERED)) {
 424                 rc = lpfc_sli4_init_vpi(vport);
 425                 if (rc) {
 426                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 427                                         "1838 Failed to INIT_VPI on vpi %d "
 428                                         "status %d\n", vpi, rc);
 429                         rc = VPORT_NORESOURCES;
 430                         lpfc_free_vpi(phba, vpi);
 431                         goto error_out;
 432                 }
 433         } else if (phba->sli_rev == LPFC_SLI_REV4) {
 434                 /*
 435                  * Driver cannot INIT_VPI now. Set the flags to
 436                  * init_vpi when reg_vfi complete.
 437                  */
 438                 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 439                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 440                 rc = VPORT_OK;
 441                 goto out;
 442         }
 443
 444         if ((phba->link_state < LPFC_LINK_UP) ||
 445             (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
 446             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 447                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 448                 rc = VPORT_OK;
 449                 goto out;
 450         }
 451
 452         if (disable) {
 453                 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 454                 rc = VPORT_OK;
 455                 goto out;
 456         }
 457
 458         /* Use the Physical nodes Fabric NDLP to determine if the link is
 459          * up and ready to FDISC.
 460          */
 461         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 462         if (ndlp &&
 463             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 464                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 465                         lpfc_set_disctmo(vport);
 466                         lpfc_initial_fdisc(vport);
 467                 } else {
 468                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 469                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 470                                          "0262 No NPIV Fabric support\n");
 471                 }
 472         } else {
 473                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 474         }
 475         rc = VPORT_OK;
 476
 477 out:
 478         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 479                          "1825 Vport Created.\n");
 480         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 481 error_out:
 482         return rc;
 483 }
 484
 485 static int
 486 lpfc_send_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 487 {
 488         int rc;
 489         struct lpfc_hba *phba = vport->phba;
 490
 491         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
 492
 493         spin_lock_irq(&ndlp->lock);
 494         if (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO) &&
 495             !ndlp->logo_waitq) {
 496                 ndlp->logo_waitq = &waitq;
 497                 ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 498                 ndlp->nlp_flag |= NLP_ISSUE_LOGO;
 499                 ndlp->save_flags |= NLP_WAIT_FOR_LOGO;
 500         }
 501         spin_unlock_irq(&ndlp->lock);
 502         rc = lpfc_issue_els_npiv_logo(vport, ndlp);
 503         if (!rc) {
 504                 wait_event_timeout(waitq,
 505                                    (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO)),
 506                                    msecs_to_jiffies(phba->fc_ratov * 2000));
 507
 508                 if (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO))
 509                         goto logo_cmpl;
 510                 /* LOGO wait failed.  Correct status. */
 511                 rc = -EINTR;
 512         } else {
 513                 rc = -EIO;
 514         }
 515
 516         /* Error - clean up node flags. */
 517         spin_lock_irq(&ndlp->lock);
 518         ndlp->nlp_flag &= ~NLP_ISSUE_LOGO;
 519         ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
 520         spin_unlock_irq(&ndlp->lock);
 521
 522  logo_cmpl:
 523         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 524                          "1824 Issue LOGO completes with status %d\n",
 525                          rc);
 526         spin_lock_irq(&ndlp->lock);
 527         ndlp->logo_waitq = NULL;
 528         spin_unlock_irq(&ndlp->lock);
 529         return rc;
 530 }
 531
 532 static int
 533 disable_vport(struct fc_vport *fc_vport)
 534 {
 535         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 536         struct lpfc_hba   *phba = vport->phba;
 537         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 538         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 539
 540         /* Can't disable during an outstanding delete. */
 541         if (vport->load_flag & FC_UNLOADING)
 542                 return 0;
 543
 544         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 545         if (ndlp && phba->link_state >= LPFC_LINK_UP)
 546                 (void)lpfc_send_npiv_logo(vport, ndlp);
 547
 548         lpfc_sli_host_down(vport);
 549
 550         /* Mark all nodes for discovery so we can remove them by
 551          * calling lpfc_cleanup_rpis(vport, 1)
 552          */
 553         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 554                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 555                         continue;
 556                 lpfc_disc_state_machine(vport, ndlp, NULL,
 557                                         NLP_EVT_DEVICE_RECOVERY);
 558         }
 559         lpfc_cleanup_rpis(vport, 1);
 560
 561         lpfc_stop_vport_timers(vport);
 562         lpfc_unreg_all_rpis(vport);
 563         lpfc_unreg_default_rpis(vport);
 564         /*
 565          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 566          * scsi_host_put() to release the vport.
 567          */
 568         lpfc_mbx_unreg_vpi(vport);
 569         if (phba->sli_rev == LPFC_SLI_REV4) {
 570                 spin_lock_irq(shost->host_lock);
 571                 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 572                 spin_unlock_irq(shost->host_lock);
 573         }
 574
 575         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 576         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 577                          "1826 Vport Disabled.\n");
 578         return VPORT_OK;
 579 }
 580
 581 static int
 582 enable_vport(struct fc_vport *fc_vport)
 583 {
 584         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 585         struct lpfc_hba   *phba = vport->phba;
 586         struct lpfc_nodelist *ndlp = NULL;
 587         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 588
 589         if ((phba->link_state < LPFC_LINK_UP) ||
 590             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 591                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 592                 return VPORT_OK;
 593         }
 594
 595         spin_lock_irq(shost->host_lock);
 596         vport->load_flag |= FC_LOADING;
 597         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
 598                 spin_unlock_irq(shost->host_lock);
 599                 lpfc_issue_init_vpi(vport);
 600                 goto out;
 601         }
 602
 603         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 604         spin_unlock_irq(shost->host_lock);
 605
 606         /* Use the Physical nodes Fabric NDLP to determine if the link is
 607          * up and ready to FDISC.
 608          */
 609         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 610         if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 611                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 612                         lpfc_set_disctmo(vport);
 613                         lpfc_initial_fdisc(vport);
 614                 } else {
 615                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 616                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 617                                          "0264 No NPIV Fabric support\n");
 618                 }
 619         } else {
 620                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 621         }
 622
 623 out:
 624         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 625                          "1827 Vport Enabled.\n");
 626         return VPORT_OK;
 627 }
 628
 629 int
 630 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 631 {
 632         if (disable)
 633                 return disable_vport(fc_vport);
 634         else
 635                 return enable_vport(fc_vport);
 636 }
 637
 638 int
 639 lpfc_vport_delete(struct fc_vport *fc_vport)
 640 {
 641         struct lpfc_nodelist *ndlp = NULL;
 642         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 643         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 644         struct lpfc_hba  *phba = vport->phba;
 645         int rc;
 646
 647         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 648                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 649                                  "1812 vport_delete failed: Cannot delete "
 650                                  "physical host\n");
 651                 return VPORT_ERROR;
 652         }
 653
 654         /* If the vport is a static vport fail the deletion. */
 655         if ((vport->vport_flag & STATIC_VPORT) &&
 656                 !(phba->pport->load_flag & FC_UNLOADING)) {
 657                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 658                                  "1837 vport_delete failed: Cannot delete "
 659                                  "static vport.\n");
 660                 return VPORT_ERROR;
 661         }
 662
 663         spin_lock_irq(&phba->hbalock);
 664         vport->load_flag |= FC_UNLOADING;
 665         spin_unlock_irq(&phba->hbalock);
 666
 667         /*
 668          * If we are not unloading the driver then prevent the vport_delete
 669          * from happening until after this vport's discovery is finished.
 670          */
 671         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 672                 int check_count = 0;
 673                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 674                        vport->port_state > LPFC_VPORT_FAILED &&
 675                        vport->port_state < LPFC_VPORT_READY) {
 676                         check_count++;
 677                         msleep(1000);
 678                 }
 679                 if (vport->port_state > LPFC_VPORT_FAILED &&
 680                     vport->port_state < LPFC_VPORT_READY)
 681                         return -EAGAIN;
 682         }
 683
 684         /*
 685          * Take early refcount for outstanding I/O requests we schedule during
 686          * delete processing for unreg_vpi.  Always keep this before
 687          * scsi_remove_host() as we can no longer obtain a reference through
 688          * scsi_host_get() after scsi_host_remove as shost is set to SHOST_DEL.
 689          */
 690         if (!scsi_host_get(shost))
 691                 return VPORT_INVAL;
 692
 693         lpfc_free_sysfs_attr(vport);
 694         lpfc_debugfs_terminate(vport);
 695
 696         /* Remove FC host to break driver binding. */
 697         fc_remove_host(shost);
 698         scsi_remove_host(shost);
 699
 700         /* Send the DA_ID and Fabric LOGO to cleanup Nameserver entries. */
 701         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 702         if (!ndlp)
 703                 goto skip_logo;
 704
 705         if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 706             phba->link_state >= LPFC_LINK_UP &&
 707             phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
 708                 if (vport->cfg_enable_da_id) {
 709                         /* Send DA_ID and wait for a completion. */
 710                         rc = lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0);
 711                         if (rc) {
 712                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 713                                                 LOG_VPORT,
 714                                                 "1829 CT command failed to "
 715                                                 "delete objects on fabric, "
 716                                                 "rc %d\n", rc);
 717                         }
 718                 }
 719
 720                 /*
 721                  * If the vpi is not registered, then a valid FDISC doesn't
 722                  * exist and there is no need for a ELS LOGO.  Just cleanup
 723                  * the ndlp.
 724                  */
 725                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED))
 726                         goto skip_logo;
 727
 728                 /* Issue a Fabric LOGO to cleanup fabric resources. */
 729                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 730                 if (!ndlp)
 731                         goto skip_logo;
 732
 733                 rc = lpfc_send_npiv_logo(vport, ndlp);
 734                 if (rc)
 735                         goto skip_logo;
 736         }
 737
 738         if (!(phba->pport->load_flag & FC_UNLOADING))
 739                 lpfc_discovery_wait(vport);
 740
 741 skip_logo:
 742
 743         lpfc_cleanup(vport);
 744
 745         /* Remove scsi host now.  The nodes are cleaned up. */
 746         lpfc_sli_host_down(vport);
 747         lpfc_stop_vport_timers(vport);
 748
 749         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 750                 lpfc_unreg_all_rpis(vport);
 751                 lpfc_unreg_default_rpis(vport);
 752                 /*
 753                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 754                  * does the scsi_host_put() to release the vport.
 755                  */
 756                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED) ||
 757                                 lpfc_mbx_unreg_vpi(vport))
 758                         scsi_host_put(shost);
 759         } else {
 760                 scsi_host_put(shost);
 761         }
 762
 763         lpfc_free_vpi(phba, vport->vpi);
 764         vport->work_port_events = 0;
 765         spin_lock_irq(&phba->port_list_lock);
 766         list_del_init(&vport->listentry);
 767         spin_unlock_irq(&phba->port_list_lock);
 768         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 769                          "1828 Vport Deleted.\n");
 770         scsi_host_put(shost);
 771         return VPORT_OK;
 772 }
 773
 774 struct lpfc_vport **
 775 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 776 {
 777         struct lpfc_vport *port_iterator;
 778         struct lpfc_vport **vports;
 779         int index = 0;
 780         vports = kcalloc(phba->max_vports + 1, sizeof(struct lpfc_vport *),
 781                          GFP_KERNEL);
 782         if (vports == NULL)
 783                 return NULL;
 784         spin_lock_irq(&phba->port_list_lock);
 785         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 786                 if (port_iterator->load_flag & FC_UNLOADING)
 787                         continue;
 788                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 789                         lpfc_printf_vlog(port_iterator, KERN_ERR,
 790                                          LOG_TRACE_EVENT,
 791                                          "1801 Create vport work array FAILED: "
 792                                          "cannot do scsi_host_get\n");
 793                         continue;
 794                 }
 795                 vports[index++] = port_iterator;
 796         }
 797         spin_unlock_irq(&phba->port_list_lock);
 798         return vports;
 799 }
 800
 801 void
 802 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 803 {
 804         int i;
 805         if (vports == NULL)
 806                 return;
 807         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
 808                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 809         kfree(vports);
 810 }
 811
 812
 813 /**
 814  * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
 815  * @vport: Pointer to vport object.
 816  *
 817  * This function resets the statistical data for the vport. This function
 818  * is called with the host_lock held
 819  **/
 820 void
 821 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 822 {
 823         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 824
 825         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 826                 if (ndlp->lat_data)
 827                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 828                                 sizeof(struct lpfc_scsicmd_bkt));
 829         }
 830 }
 831
 832
 833 /**
 834  * lpfc_alloc_bucket - Allocate data buffer required for statistical data
 835  * @vport: Pointer to vport object.
 836  *
 837  * This function allocates data buffer required for all the FC
 838  * nodes of the vport to collect statistical data.
 839  **/
 840 void
 841 lpfc_alloc_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
 847                 kfree(ndlp->lat_data);
 848                 ndlp->lat_data = NULL;
 849
 850                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 851                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 852                                          sizeof(struct lpfc_scsicmd_bkt),
 853                                          GFP_ATOMIC);
 854
 855                         if (!ndlp->lat_data)
 856                                 lpfc_printf_vlog(vport, KERN_ERR,
 857                                         LOG_TRACE_EVENT,
 858                                         "0287 lpfc_alloc_bucket failed to "
 859                                         "allocate statistical data buffer DID "
 860                                         "0x%x\n", ndlp->nlp_DID);
 861                 }
 862         }
 863 }
 864
 865 /**
 866  * lpfc_free_bucket - Free data buffer required for statistical data
 867  * @vport: Pointer to vport object.
 868  *
 869  * Th function frees statistical data buffer of all the FC
 870  * nodes of the vport.
 871  **/
 872 void
 873 lpfc_free_bucket(struct lpfc_vport *vport)
 874 {
 875         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 876
 877         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 878
 879                 kfree(ndlp->lat_data);
 880                 ndlp->lat_data = NULL;
 881         }
 882 }