Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / drivers / scsi / lpfc / lpfc_vport.c
1 /*******************************************************************
2  * This file is part of the Emulex Linux Device Driver for         *
3  * Fibre Channel Host Bus Adapters.                                *
4  * Copyright (C) 2004-2008 Emulex.  All rights reserved.           *
5  * EMULEX and SLI are trademarks of Emulex.                        *
6  * www.emulex.com                                                  *
7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
8  *                                                                 *
9  * This program is free software; you can redistribute it and/or   *
10  * modify it under the terms of version 2 of the GNU General       *
11  * Public License as published by the Free Software Foundation.    *
12  * This program is distributed in the hope that it will be useful. *
13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
18  * more details, a copy of which can be found in the file COPYING  *
19  * included with this package.                                     *
20  *******************************************************************/
21
22 #include <linux/blkdev.h>
23 #include <linux/delay.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/idr.h>
26 #include <linux/interrupt.h>
27 #include <linux/kthread.h>
28 #include <linux/pci.h>
29 #include <linux/spinlock.h>
30
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_host.h>
34 #include <scsi/scsi_transport_fc.h>
35 #include "lpfc_hw.h"
36 #include "lpfc_sli.h"
37 #include "lpfc_disc.h"
38 #include "lpfc_scsi.h"
39 #include "lpfc.h"
40 #include "lpfc_logmsg.h"
41 #include "lpfc_crtn.h"
42 #include "lpfc_version.h"
43 #include "lpfc_vport.h"
44
45 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
46                                  enum fc_vport_state new_state)
47 {
48         struct fc_vport *fc_vport = vport->fc_vport;
49
50         if (fc_vport) {
51                 /*
52                  * When the transport defines fc_vport_set state we will replace
53                  * this code with the following line
54                  */
55                 /* fc_vport_set_state(fc_vport, new_state); */
56                 if (new_state != FC_VPORT_INITIALIZING)
57                         fc_vport->vport_last_state = fc_vport->vport_state;
58                 fc_vport->vport_state = new_state;
59         }
60
61         /* for all the error states we will set the invternal state to FAILED */
62         switch (new_state) {
63         case FC_VPORT_NO_FABRIC_SUPP:
64         case FC_VPORT_NO_FABRIC_RSCS:
65         case FC_VPORT_FABRIC_LOGOUT:
66         case FC_VPORT_FABRIC_REJ_WWN:
67         case FC_VPORT_FAILED:
68                 vport->port_state = LPFC_VPORT_FAILED;
69                 break;
70         case FC_VPORT_LINKDOWN:
71                 vport->port_state = LPFC_VPORT_UNKNOWN;
72                 break;
73         default:
74                 /* do nothing */
75                 break;
76         }
77 }
78
79 static int
80 lpfc_alloc_vpi(struct lpfc_hba *phba)
81 {
82         int  vpi;
83
84         spin_lock_irq(&phba->hbalock);
85         /* Start at bit 1 because vpi zero is reserved for the physical port */
86         vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
87         if (vpi > phba->max_vpi)
88                 vpi = 0;
89         else
90                 set_bit(vpi, phba->vpi_bmask);
91         spin_unlock_irq(&phba->hbalock);
92         return vpi;
93 }
94
95 static void
96 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
97 {
98         spin_lock_irq(&phba->hbalock);
99         clear_bit(vpi, phba->vpi_bmask);
100         spin_unlock_irq(&phba->hbalock);
101 }
102
103 static int
104 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
105 {
106         LPFC_MBOXQ_t *pmb;
107         MAILBOX_t *mb;
108         struct lpfc_dmabuf *mp;
109         int  rc;
110
111         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
112         if (!pmb) {
113                 return -ENOMEM;
114         }
115         mb = &pmb->mb;
116
117         lpfc_read_sparam(phba, pmb, vport->vpi);
118         /*
119          * Grab buffer pointer and clear context1 so we can use
120          * lpfc_sli_issue_box_wait
121          */
122         mp = (struct lpfc_dmabuf *) pmb->context1;
123         pmb->context1 = NULL;
124
125         pmb->vport = vport;
126         rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
127         if (rc != MBX_SUCCESS) {
128                 if (signal_pending(current)) {
129                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
130                                          "1830 Signal aborted mbxCmd x%x\n",
131                                          mb->mbxCommand);
132                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
133                         kfree(mp);
134                         if (rc != MBX_TIMEOUT)
135                                 mempool_free(pmb, phba->mbox_mem_pool);
136                         return -EINTR;
137                 } else {
138                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
139                                          "1818 VPort failed init, mbxCmd x%x "
140                                          "READ_SPARM mbxStatus x%x, rc = x%x\n",
141                                          mb->mbxCommand, mb->mbxStatus, rc);
142                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
143                         kfree(mp);
144                         if (rc != MBX_TIMEOUT)
145                                 mempool_free(pmb, phba->mbox_mem_pool);
146                         return -EIO;
147                 }
148         }
149
150         memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
151         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
152                sizeof (struct lpfc_name));
153         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
154                sizeof (struct lpfc_name));
155
156         lpfc_mbuf_free(phba, mp->virt, mp->phys);
157         kfree(mp);
158         mempool_free(pmb, phba->mbox_mem_pool);
159
160         return 0;
161 }
162
163 static int
164 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
165                       const char *name_type)
166 {
167                                 /* ensure that IEEE format 1 addresses
168                                  * contain zeros in bits 59-48
169                                  */
170         if (!((wwn->u.wwn[0] >> 4) == 1 &&
171               ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
172                 return 1;
173
174         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
175                         "1822 Invalid %s: %02x:%02x:%02x:%02x:"
176                         "%02x:%02x:%02x:%02x\n",
177                         name_type,
178                         wwn->u.wwn[0], wwn->u.wwn[1],
179                         wwn->u.wwn[2], wwn->u.wwn[3],
180                         wwn->u.wwn[4], wwn->u.wwn[5],
181                         wwn->u.wwn[6], wwn->u.wwn[7]);
182         return 0;
183 }
184
185 static int
186 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
187 {
188         struct lpfc_vport *vport;
189         unsigned long flags;
190
191         spin_lock_irqsave(&phba->hbalock, flags);
192         list_for_each_entry(vport, &phba->port_list, listentry) {
193                 if (vport == new_vport)
194                         continue;
195                 /* If they match, return not unique */
196                 if (memcmp(&vport->fc_sparam.portName,
197                            &new_vport->fc_sparam.portName,
198                            sizeof(struct lpfc_name)) == 0) {
199                         spin_unlock_irqrestore(&phba->hbalock, flags);
200                         return 0;
201                 }
202         }
203         spin_unlock_irqrestore(&phba->hbalock, flags);
204         return 1;
205 }
206
207 int
208 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
209 {
210         struct lpfc_nodelist *ndlp;
211         struct Scsi_Host *shost = fc_vport->shost;
212         struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
213         struct lpfc_hba   *phba = pport->phba;
214         struct lpfc_vport *vport = NULL;
215         int instance;
216         int vpi;
217         int rc = VPORT_ERROR;
218         int status;
219
220         if ((phba->sli_rev < 3) ||
221                 !(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
222                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
223                                 "1808 Create VPORT failed: "
224                                 "NPIV is not enabled: SLImode:%d\n",
225                                 phba->sli_rev);
226                 rc = VPORT_INVAL;
227                 goto error_out;
228         }
229
230         vpi = lpfc_alloc_vpi(phba);
231         if (vpi == 0) {
232                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
233                                 "1809 Create VPORT failed: "
234                                 "Max VPORTs (%d) exceeded\n",
235                                 phba->max_vpi);
236                 rc = VPORT_NORESOURCES;
237                 goto error_out;
238         }
239
240
241         /* Assign an unused board number */
242         if ((instance = lpfc_get_instance()) < 0) {
243                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
244                                 "1810 Create VPORT failed: Cannot get "
245                                 "instance number\n");
246                 lpfc_free_vpi(phba, vpi);
247                 rc = VPORT_NORESOURCES;
248                 goto error_out;
249         }
250
251         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
252         if (!vport) {
253                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
254                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
255                 lpfc_free_vpi(phba, vpi);
256                 rc = VPORT_NORESOURCES;
257                 goto error_out;
258         }
259
260         vport->vpi = vpi;
261         lpfc_debugfs_initialize(vport);
262
263         if ((status = lpfc_vport_sparm(phba, vport))) {
264                 if (status == -EINTR) {
265                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
266                                          "1831 Create VPORT Interrupted.\n");
267                         rc = VPORT_ERROR;
268                 } else {
269                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
270                                          "1813 Create VPORT failed. "
271                                          "Cannot get sparam\n");
272                         rc = VPORT_NORESOURCES;
273                 }
274                 lpfc_free_vpi(phba, vpi);
275                 destroy_port(vport);
276                 goto error_out;
277         }
278
279         memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
280         memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
281
282         if (fc_vport->node_name != 0)
283                 u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
284         if (fc_vport->port_name != 0)
285                 u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
286
287         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
288         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
289
290         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
291             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
292                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
293                                  "1821 Create VPORT failed. "
294                                  "Invalid WWN format\n");
295                 lpfc_free_vpi(phba, vpi);
296                 destroy_port(vport);
297                 rc = VPORT_INVAL;
298                 goto error_out;
299         }
300
301         if (!lpfc_unique_wwpn(phba, vport)) {
302                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
303                                  "1823 Create VPORT failed. "
304                                  "Duplicate WWN on HBA\n");
305                 lpfc_free_vpi(phba, vpi);
306                 destroy_port(vport);
307                 rc = VPORT_INVAL;
308                 goto error_out;
309         }
310
311         *(struct lpfc_vport **)fc_vport->dd_data = vport;
312         vport->fc_vport = fc_vport;
313
314         if ((phba->link_state < LPFC_LINK_UP) ||
315             (phba->fc_topology == TOPOLOGY_LOOP)) {
316                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
317                 rc = VPORT_OK;
318                 goto out;
319         }
320
321         if (disable) {
322                 rc = VPORT_OK;
323                 goto out;
324         }
325
326         /* Use the Physical nodes Fabric NDLP to determine if the link is
327          * up and ready to FDISC.
328          */
329         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
330         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
331             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
332                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
333                         lpfc_set_disctmo(vport);
334                         lpfc_initial_fdisc(vport);
335                 } else {
336                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
337                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
338                                          "0262 No NPIV Fabric support\n");
339                 }
340         } else {
341                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
342         }
343         rc = VPORT_OK;
344
345 out:
346         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
347                         "1825 Vport Created.\n");
348         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
349 error_out:
350         return rc;
351 }
352
353 static int
354 disable_vport(struct fc_vport *fc_vport)
355 {
356         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
357         struct lpfc_hba   *phba = vport->phba;
358         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
359         long timeout;
360
361         ndlp = lpfc_findnode_did(vport, Fabric_DID);
362         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
363             && phba->link_state >= LPFC_LINK_UP) {
364                 vport->unreg_vpi_cmpl = VPORT_INVAL;
365                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
366                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
367                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
368                                 timeout = schedule_timeout(timeout);
369         }
370
371         lpfc_sli_host_down(vport);
372
373         /* Mark all nodes for discovery so we can remove them by
374          * calling lpfc_cleanup_rpis(vport, 1)
375          */
376         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
377                 if (!NLP_CHK_NODE_ACT(ndlp))
378                         continue;
379                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
380                         continue;
381                 lpfc_disc_state_machine(vport, ndlp, NULL,
382                                         NLP_EVT_DEVICE_RECOVERY);
383         }
384         lpfc_cleanup_rpis(vport, 1);
385
386         lpfc_stop_vport_timers(vport);
387         lpfc_unreg_all_rpis(vport);
388         lpfc_unreg_default_rpis(vport);
389         /*
390          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
391          * scsi_host_put() to release the vport.
392          */
393         lpfc_mbx_unreg_vpi(vport);
394
395         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
396         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
397                          "1826 Vport Disabled.\n");
398         return VPORT_OK;
399 }
400
401 static int
402 enable_vport(struct fc_vport *fc_vport)
403 {
404         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
405         struct lpfc_hba   *phba = vport->phba;
406         struct lpfc_nodelist *ndlp = NULL;
407
408         if ((phba->link_state < LPFC_LINK_UP) ||
409             (phba->fc_topology == TOPOLOGY_LOOP)) {
410                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
411                 return VPORT_OK;
412         }
413
414         vport->load_flag |= FC_LOADING;
415         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
416
417         /* Use the Physical nodes Fabric NDLP to determine if the link is
418          * up and ready to FDISC.
419          */
420         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
421         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
422             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
423                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
424                         lpfc_set_disctmo(vport);
425                         lpfc_initial_fdisc(vport);
426                 } else {
427                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
428                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
429                                          "0264 No NPIV Fabric support\n");
430                 }
431         } else {
432                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
433         }
434         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
435                          "1827 Vport Enabled.\n");
436         return VPORT_OK;
437 }
438
439 int
440 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
441 {
442         if (disable)
443                 return disable_vport(fc_vport);
444         else
445                 return enable_vport(fc_vport);
446 }
447
448
449 int
450 lpfc_vport_delete(struct fc_vport *fc_vport)
451 {
452         struct lpfc_nodelist *ndlp = NULL;
453         struct Scsi_Host *shost = (struct Scsi_Host *) fc_vport->shost;
454         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
455         struct lpfc_hba   *phba = vport->phba;
456         long timeout;
457
458         if (vport->port_type == LPFC_PHYSICAL_PORT) {
459                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
460                                  "1812 vport_delete failed: Cannot delete "
461                                  "physical host\n");
462                 return VPORT_ERROR;
463         }
464         /*
465          * If we are not unloading the driver then prevent the vport_delete
466          * from happening until after this vport's discovery is finished.
467          */
468         if (!(phba->pport->load_flag & FC_UNLOADING)) {
469                 int check_count = 0;
470                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
471                        vport->port_state > LPFC_VPORT_FAILED &&
472                        vport->port_state < LPFC_VPORT_READY) {
473                         check_count++;
474                         msleep(1000);
475                 }
476                 if (vport->port_state > LPFC_VPORT_FAILED &&
477                     vport->port_state < LPFC_VPORT_READY)
478                         return -EAGAIN;
479         }
480         /*
481          * This is a bit of a mess.  We want to ensure the shost doesn't get
482          * torn down until we're done with the embedded lpfc_vport structure.
483          *
484          * Beyond holding a reference for this function, we also need a
485          * reference for outstanding I/O requests we schedule during delete
486          * processing.  But once we scsi_remove_host() we can no longer obtain
487          * a reference through scsi_host_get().
488          *
489          * So we take two references here.  We release one reference at the
490          * bottom of the function -- after delinking the vport.  And we
491          * release the other at the completion of the unreg_vpi that get's
492          * initiated after we've disposed of all other resources associated
493          * with the port.
494          */
495         if (!scsi_host_get(shost) || !scsi_host_get(shost))
496                 return VPORT_INVAL;
497         spin_lock_irq(&phba->hbalock);
498         vport->load_flag |= FC_UNLOADING;
499         spin_unlock_irq(&phba->hbalock);
500         kfree(vport->vname);
501         lpfc_debugfs_terminate(vport);
502         fc_remove_host(lpfc_shost_from_vport(vport));
503         scsi_remove_host(lpfc_shost_from_vport(vport));
504
505         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
506
507         /* In case of driver unload, we shall not perform fabric logo as the
508          * worker thread already stopped at this stage and, in this case, we
509          * can safely skip the fabric logo.
510          */
511         if (phba->pport->load_flag & FC_UNLOADING) {
512                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
513                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
514                     phba->link_state >= LPFC_LINK_UP) {
515                         /* First look for the Fabric ndlp */
516                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
517                         if (!ndlp)
518                                 goto skip_logo;
519                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
520                                 ndlp = lpfc_enable_node(vport, ndlp,
521                                                         NLP_STE_UNUSED_NODE);
522                                 if (!ndlp)
523                                         goto skip_logo;
524                         }
525                         /* Remove ndlp from vport npld list */
526                         lpfc_dequeue_node(vport, ndlp);
527
528                         /* Indicate free memory when release */
529                         spin_lock_irq(&phba->ndlp_lock);
530                         NLP_SET_FREE_REQ(ndlp);
531                         spin_unlock_irq(&phba->ndlp_lock);
532                         /* Kick off release ndlp when it can be safely done */
533                         lpfc_nlp_put(ndlp);
534                 }
535                 goto skip_logo;
536         }
537
538         /* Otherwise, we will perform fabric logo as needed */
539         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
540             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
541             phba->link_state >= LPFC_LINK_UP) {
542                 if (vport->cfg_enable_da_id) {
543                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
544                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
545                                 while (vport->ct_flags && timeout)
546                                         timeout = schedule_timeout(timeout);
547                         else
548                                 lpfc_printf_log(vport->phba, KERN_WARNING,
549                                                 LOG_VPORT,
550                                                 "1829 CT command failed to "
551                                                 "delete objects on fabric. \n");
552                 }
553                 /* First look for the Fabric ndlp */
554                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
555                 if (!ndlp) {
556                         /* Cannot find existing Fabric ndlp, allocate one */
557                         ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
558                         if (!ndlp)
559                                 goto skip_logo;
560                         lpfc_nlp_init(vport, ndlp, Fabric_DID);
561                         /* Indicate free memory when release */
562                         NLP_SET_FREE_REQ(ndlp);
563                 } else {
564                         if (!NLP_CHK_NODE_ACT(ndlp))
565                                 ndlp = lpfc_enable_node(vport, ndlp,
566                                                 NLP_STE_UNUSED_NODE);
567                                 if (!ndlp)
568                                         goto skip_logo;
569
570                         /* Remove ndlp from vport npld list */
571                         lpfc_dequeue_node(vport, ndlp);
572                         spin_lock_irq(&phba->ndlp_lock);
573                         if (!NLP_CHK_FREE_REQ(ndlp))
574                                 /* Indicate free memory when release */
575                                 NLP_SET_FREE_REQ(ndlp);
576                         else {
577                                 /* Skip this if ndlp is already in free mode */
578                                 spin_unlock_irq(&phba->ndlp_lock);
579                                 goto skip_logo;
580                         }
581                         spin_unlock_irq(&phba->ndlp_lock);
582                 }
583                 vport->unreg_vpi_cmpl = VPORT_INVAL;
584                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
585                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
586                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
587                                 timeout = schedule_timeout(timeout);
588         }
589
590 skip_logo:
591         lpfc_cleanup(vport);
592         lpfc_sli_host_down(vport);
593
594         lpfc_stop_vport_timers(vport);
595
596         if (!(phba->pport->load_flag & FC_UNLOADING)) {
597                 lpfc_unreg_all_rpis(vport);
598                 lpfc_unreg_default_rpis(vport);
599                 /*
600                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
601                  * does the scsi_host_put() to release the vport.
602                  */
603                 lpfc_mbx_unreg_vpi(vport);
604         }
605
606         lpfc_free_vpi(phba, vport->vpi);
607         vport->work_port_events = 0;
608         spin_lock_irq(&phba->hbalock);
609         list_del_init(&vport->listentry);
610         spin_unlock_irq(&phba->hbalock);
611         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
612                          "1828 Vport Deleted.\n");
613         scsi_host_put(shost);
614         return VPORT_OK;
615 }
616
617 struct lpfc_vport **
618 lpfc_create_vport_work_array(struct lpfc_hba *phba)
619 {
620         struct lpfc_vport *port_iterator;
621         struct lpfc_vport **vports;
622         int index = 0;
623         vports = kzalloc((phba->max_vpi + 1) * sizeof(struct lpfc_vport *),
624                          GFP_KERNEL);
625         if (vports == NULL)
626                 return NULL;
627         spin_lock_irq(&phba->hbalock);
628         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
629                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
630                         lpfc_printf_vlog(port_iterator, KERN_WARNING, LOG_VPORT,
631                                          "1801 Create vport work array FAILED: "
632                                          "cannot do scsi_host_get\n");
633                         continue;
634                 }
635                 vports[index++] = port_iterator;
636         }
637         spin_unlock_irq(&phba->hbalock);
638         return vports;
639 }
640
641 void
642 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
643 {
644         int i;
645         if (vports == NULL)
646                 return;
647         for (i=0; vports[i] != NULL && i <= phba->max_vpi; i++)
648                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
649         kfree(vports);
650 }