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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         /*
 317          * In SLI4, the vpi must be activated before it can be used
 318          * by the port.
 319          */
 320         if (phba->sli_rev == LPFC_SLI_REV4) {
 321                 rc = lpfc_sli4_init_vpi(phba, vpi);
 322                 if (rc) {
 323                         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 324                                         "1838 Failed to INIT_VPI on vpi %d "
 325                                         "status %d\n", vpi, rc);
 326                         rc = VPORT_NORESOURCES;
 327                         lpfc_free_vpi(phba, vpi);
 328                         goto error_out;
 329                 }
 330         }
 331
 332         /* Assign an unused board number */
 333         if ((instance = lpfc_get_instance()) < 0) {
 334                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 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_VPORT,
 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_VPORT,
 357                                          "1831 Create VPORT Interrupted.\n");
 358                         rc = VPORT_ERROR;
 359                 } else {
 360                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 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         memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
 371         memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
 372         if (fc_vport->node_name != 0)
 373                 u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 374         if (fc_vport->port_name != 0)
 375                 u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 376
 377         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 378         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 379
 380         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 381             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 382                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 383                                  "1821 Create VPORT failed. "
 384                                  "Invalid WWN format\n");
 385                 lpfc_free_vpi(phba, vpi);
 386                 destroy_port(vport);
 387                 rc = VPORT_INVAL;
 388                 goto error_out;
 389         }
 390
 391         if (!lpfc_unique_wwpn(phba, vport)) {
 392                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 393                                  "1823 Create VPORT failed. "
 394                                  "Duplicate WWN on HBA\n");
 395                 lpfc_free_vpi(phba, vpi);
 396                 destroy_port(vport);
 397                 rc = VPORT_INVAL;
 398                 goto error_out;
 399         }
 400
 401         /* Create binary sysfs attribute for vport */
 402         lpfc_alloc_sysfs_attr(vport);
 403
 404         *(struct lpfc_vport **)fc_vport->dd_data = vport;
 405         vport->fc_vport = fc_vport;
 406
 407         if ((phba->link_state < LPFC_LINK_UP) ||
 408             (phba->fc_topology == TOPOLOGY_LOOP)) {
 409                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 410                 rc = VPORT_OK;
 411                 goto out;
 412         }
 413
 414         if (disable) {
 415                 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 416                 rc = VPORT_OK;
 417                 goto out;
 418         }
 419
 420         /* Use the Physical nodes Fabric NDLP to determine if the link is
 421          * up and ready to FDISC.
 422          */
 423         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 424         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 425             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 426                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 427                         lpfc_set_disctmo(vport);
 428                         lpfc_initial_fdisc(vport);
 429                 } else {
 430                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 431                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 432                                          "0262 No NPIV Fabric support\n");
 433                 }
 434         } else {
 435                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 436         }
 437         rc = VPORT_OK;
 438
 439 out:
 440         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 441                         "1825 Vport Created.\n");
 442         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 443 error_out:
 444         return rc;
 445 }
 446
 447 static int
 448 disable_vport(struct fc_vport *fc_vport)
 449 {
 450         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 451         struct lpfc_hba   *phba = vport->phba;
 452         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 453         long timeout;
 454
 455         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 456         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 457             && phba->link_state >= LPFC_LINK_UP) {
 458                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 459                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 460                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 461                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 462                                 timeout = schedule_timeout(timeout);
 463         }
 464
 465         lpfc_sli_host_down(vport);
 466
 467         /* Mark all nodes for discovery so we can remove them by
 468          * calling lpfc_cleanup_rpis(vport, 1)
 469          */
 470         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 471                 if (!NLP_CHK_NODE_ACT(ndlp))
 472                         continue;
 473                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 474                         continue;
 475                 lpfc_disc_state_machine(vport, ndlp, NULL,
 476                                         NLP_EVT_DEVICE_RECOVERY);
 477         }
 478         lpfc_cleanup_rpis(vport, 1);
 479
 480         lpfc_stop_vport_timers(vport);
 481         lpfc_unreg_all_rpis(vport);
 482         lpfc_unreg_default_rpis(vport);
 483         /*
 484          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 485          * scsi_host_put() to release the vport.
 486          */
 487         lpfc_mbx_unreg_vpi(vport);
 488
 489         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 490         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 491                          "1826 Vport Disabled.\n");
 492         return VPORT_OK;
 493 }
 494
 495 static int
 496 enable_vport(struct fc_vport *fc_vport)
 497 {
 498         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 499         struct lpfc_hba   *phba = vport->phba;
 500         struct lpfc_nodelist *ndlp = NULL;
 501
 502         if ((phba->link_state < LPFC_LINK_UP) ||
 503             (phba->fc_topology == TOPOLOGY_LOOP)) {
 504                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 505                 return VPORT_OK;
 506         }
 507
 508         vport->load_flag |= FC_LOADING;
 509         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 510
 511         /* Use the Physical nodes Fabric NDLP to determine if the link is
 512          * up and ready to FDISC.
 513          */
 514         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 515         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 516             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 517                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 518                         lpfc_set_disctmo(vport);
 519                         lpfc_initial_fdisc(vport);
 520                 } else {
 521                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 522                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 523                                          "0264 No NPIV Fabric support\n");
 524                 }
 525         } else {
 526                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 527         }
 528         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 529                          "1827 Vport Enabled.\n");
 530         return VPORT_OK;
 531 }
 532
 533 int
 534 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 535 {
 536         if (disable)
 537                 return disable_vport(fc_vport);
 538         else
 539                 return enable_vport(fc_vport);
 540 }
 541
 542
 543 int
 544 lpfc_vport_delete(struct fc_vport *fc_vport)
 545 {
 546         struct lpfc_nodelist *ndlp = NULL;
 547         struct Scsi_Host *shost = (struct Scsi_Host *) fc_vport->shost;
 548         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 549         struct lpfc_hba   *phba = vport->phba;
 550         long timeout;
 551
 552         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 553                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 554                                  "1812 vport_delete failed: Cannot delete "
 555                                  "physical host\n");
 556                 return VPORT_ERROR;
 557         }
 558
 559         /* If the vport is a static vport fail the deletion. */
 560         if ((vport->vport_flag & STATIC_VPORT) &&
 561                 !(phba->pport->load_flag & FC_UNLOADING)) {
 562                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 563                                  "1837 vport_delete failed: Cannot delete "
 564                                  "static vport.\n");
 565                 return VPORT_ERROR;
 566         }
 567
 568         /*
 569          * If we are not unloading the driver then prevent the vport_delete
 570          * from happening until after this vport's discovery is finished.
 571          */
 572         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 573                 int check_count = 0;
 574                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 575                        vport->port_state > LPFC_VPORT_FAILED &&
 576                        vport->port_state < LPFC_VPORT_READY) {
 577                         check_count++;
 578                         msleep(1000);
 579                 }
 580                 if (vport->port_state > LPFC_VPORT_FAILED &&
 581                     vport->port_state < LPFC_VPORT_READY)
 582                         return -EAGAIN;
 583         }
 584         /*
 585          * This is a bit of a mess.  We want to ensure the shost doesn't get
 586          * torn down until we're done with the embedded lpfc_vport structure.
 587          *
 588          * Beyond holding a reference for this function, we also need a
 589          * reference for outstanding I/O requests we schedule during delete
 590          * processing.  But once we scsi_remove_host() we can no longer obtain
 591          * a reference through scsi_host_get().
 592          *
 593          * So we take two references here.  We release one reference at the
 594          * bottom of the function -- after delinking the vport.  And we
 595          * release the other at the completion of the unreg_vpi that get's
 596          * initiated after we've disposed of all other resources associated
 597          * with the port.
 598          */
 599         if (!scsi_host_get(shost))
 600                 return VPORT_INVAL;
 601         if (!scsi_host_get(shost)) {
 602                 scsi_host_put(shost);
 603                 return VPORT_INVAL;
 604         }
 605         spin_lock_irq(&phba->hbalock);
 606         vport->load_flag |= FC_UNLOADING;
 607         spin_unlock_irq(&phba->hbalock);
 608
 609         lpfc_free_sysfs_attr(vport);
 610
 611         lpfc_debugfs_terminate(vport);
 612
 613         /* Remove FC host and then SCSI host with the vport */
 614         fc_remove_host(lpfc_shost_from_vport(vport));
 615         scsi_remove_host(lpfc_shost_from_vport(vport));
 616
 617         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 618
 619         /* In case of driver unload, we shall not perform fabric logo as the
 620          * worker thread already stopped at this stage and, in this case, we
 621          * can safely skip the fabric logo.
 622          */
 623         if (phba->pport->load_flag & FC_UNLOADING) {
 624                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 625                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 626                     phba->link_state >= LPFC_LINK_UP) {
 627                         /* First look for the Fabric ndlp */
 628                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 629                         if (!ndlp)
 630                                 goto skip_logo;
 631                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
 632                                 ndlp = lpfc_enable_node(vport, ndlp,
 633                                                         NLP_STE_UNUSED_NODE);
 634                                 if (!ndlp)
 635                                         goto skip_logo;
 636                         }
 637                         /* Remove ndlp from vport npld list */
 638                         lpfc_dequeue_node(vport, ndlp);
 639
 640                         /* Indicate free memory when release */
 641                         spin_lock_irq(&phba->ndlp_lock);
 642                         NLP_SET_FREE_REQ(ndlp);
 643                         spin_unlock_irq(&phba->ndlp_lock);
 644                         /* Kick off release ndlp when it can be safely done */
 645                         lpfc_nlp_put(ndlp);
 646                 }
 647                 goto skip_logo;
 648         }
 649
 650         /* Otherwise, we will perform fabric logo as needed */
 651         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 652             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 653             phba->link_state >= LPFC_LINK_UP &&
 654             phba->fc_topology != TOPOLOGY_LOOP) {
 655                 if (vport->cfg_enable_da_id) {
 656                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 657                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
 658                                 while (vport->ct_flags && timeout)
 659                                         timeout = schedule_timeout(timeout);
 660                         else
 661                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 662                                                 LOG_VPORT,
 663                                                 "1829 CT command failed to "
 664                                                 "delete objects on fabric. \n");
 665                 }
 666                 /* First look for the Fabric ndlp */
 667                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 668                 if (!ndlp) {
 669                         /* Cannot find existing Fabric ndlp, allocate one */
 670                         ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
 671                         if (!ndlp)
 672                                 goto skip_logo;
 673                         lpfc_nlp_init(vport, ndlp, Fabric_DID);
 674                         /* Indicate free memory when release */
 675                         NLP_SET_FREE_REQ(ndlp);
 676                 } else {
 677                         if (!NLP_CHK_NODE_ACT(ndlp))
 678                                 ndlp = lpfc_enable_node(vport, ndlp,
 679                                                 NLP_STE_UNUSED_NODE);
 680                                 if (!ndlp)
 681                                         goto skip_logo;
 682
 683                         /* Remove ndlp from vport npld list */
 684                         lpfc_dequeue_node(vport, ndlp);
 685                         spin_lock_irq(&phba->ndlp_lock);
 686                         if (!NLP_CHK_FREE_REQ(ndlp))
 687                                 /* Indicate free memory when release */
 688                                 NLP_SET_FREE_REQ(ndlp);
 689                         else {
 690                                 /* Skip this if ndlp is already in free mode */
 691                                 spin_unlock_irq(&phba->ndlp_lock);
 692                                 goto skip_logo;
 693                         }
 694                         spin_unlock_irq(&phba->ndlp_lock);
 695                 }
 696                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 697                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 698                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 699                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 700                                 timeout = schedule_timeout(timeout);
 701         }
 702
 703         if (!(phba->pport->load_flag & FC_UNLOADING))
 704                 lpfc_discovery_wait(vport);
 705
 706 skip_logo:
 707         lpfc_cleanup(vport);
 708         lpfc_sli_host_down(vport);
 709
 710         lpfc_stop_vport_timers(vport);
 711
 712         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 713                 lpfc_unreg_all_rpis(vport);
 714                 lpfc_unreg_default_rpis(vport);
 715                 /*
 716                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 717                  * does the scsi_host_put() to release the vport.
 718                  */
 719                 if (lpfc_mbx_unreg_vpi(vport))
 720                         scsi_host_put(shost);
 721         } else
 722                 scsi_host_put(shost);
 723
 724         lpfc_free_vpi(phba, vport->vpi);
 725         vport->work_port_events = 0;
 726         spin_lock_irq(&phba->hbalock);
 727         list_del_init(&vport->listentry);
 728         spin_unlock_irq(&phba->hbalock);
 729         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 730                          "1828 Vport Deleted.\n");
 731         scsi_host_put(shost);
 732         return VPORT_OK;
 733 }
 734
 735 struct lpfc_vport **
 736 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 737 {
 738         struct lpfc_vport *port_iterator;
 739         struct lpfc_vport **vports;
 740         int index = 0;
 741         vports = kzalloc((phba->max_vports + 1) * sizeof(struct lpfc_vport *),
 742                          GFP_KERNEL);
 743         if (vports == NULL)
 744                 return NULL;
 745         spin_lock_irq(&phba->hbalock);
 746         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 747                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 748                         lpfc_printf_vlog(port_iterator, KERN_WARNING, LOG_VPORT,
 749                                          "1801 Create vport work array FAILED: "
 750                                          "cannot do scsi_host_get\n");
 751                         continue;
 752                 }
 753                 vports[index++] = port_iterator;
 754         }
 755         spin_unlock_irq(&phba->hbalock);
 756         return vports;
 757 }
 758
 759 void
 760 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 761 {
 762         int i;
 763         if (vports == NULL)
 764                 return;
 765         for (i = 0; vports[i] != NULL && i <= phba->max_vports; i++)
 766                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 767         kfree(vports);
 768 }
 769
 770
 771 /**
 772  * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
 773  * @vport: Pointer to vport object.
 774  *
 775  * This function resets the statistical data for the vport. This function
 776  * is called with the host_lock held
 777  **/
 778 void
 779 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 780 {
 781         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 782
 783         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 784                 if (!NLP_CHK_NODE_ACT(ndlp))
 785                         continue;
 786                 if (ndlp->lat_data)
 787                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 788                                 sizeof(struct lpfc_scsicmd_bkt));
 789         }
 790 }
 791
 792
 793 /**
 794  * lpfc_alloc_bucket - Allocate data buffer required for statistical data
 795  * @vport: Pointer to vport object.
 796  *
 797  * This function allocates data buffer required for all the FC
 798  * nodes of the vport to collect statistical data.
 799  **/
 800 void
 801 lpfc_alloc_bucket(struct lpfc_vport *vport)
 802 {
 803         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 804
 805         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 806                 if (!NLP_CHK_NODE_ACT(ndlp))
 807                         continue;
 808
 809                 kfree(ndlp->lat_data);
 810                 ndlp->lat_data = NULL;
 811
 812                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 813                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 814                                          sizeof(struct lpfc_scsicmd_bkt),
 815                                          GFP_ATOMIC);
 816
 817                         if (!ndlp->lat_data)
 818                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
 819                                         "0287 lpfc_alloc_bucket failed to "
 820                                         "allocate statistical data buffer DID "
 821                                         "0x%x\n", ndlp->nlp_DID);
 822                 }
 823         }
 824 }
 825
 826 /**
 827  * lpfc_free_bucket - Free data buffer required for statistical data
 828  * @vport: Pointer to vport object.
 829  *
 830  * Th function frees statistical data buffer of all the FC
 831  * nodes of the vport.
 832  **/
 833 void
 834 lpfc_free_bucket(struct lpfc_vport *vport)
 835 {
 836         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 837
 838         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 839                 if (!NLP_CHK_NODE_ACT(ndlp))
 840                         continue;
 841
 842                 kfree(ndlp->lat_data);
 843                 ndlp->lat_data = NULL;
 844         }
 845 }