summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/lpfc/lpfc_vport.c
blob: a6313ee84ac50356f289f02d28cc0c1788ba47d5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2008 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/pci.h>
#include <linux/spinlock.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_version.h"
#include "lpfc_vport.h"

inline void lpfc_vport_set_state(struct lpfc_vport *vport,
				 enum fc_vport_state new_state)
{
	struct fc_vport *fc_vport = vport->fc_vport;

	if (fc_vport) {
		/*
		 * When the transport defines fc_vport_set state we will replace
		 * this code with the following line
		 */
		/* fc_vport_set_state(fc_vport, new_state); */
		if (new_state != FC_VPORT_INITIALIZING)
			fc_vport->vport_last_state = fc_vport->vport_state;
		fc_vport->vport_state = new_state;
	}

	/* for all the error states we will set the invternal state to FAILED */
	switch (new_state) {
	case FC_VPORT_NO_FABRIC_SUPP:
	case FC_VPORT_NO_FABRIC_RSCS:
	case FC_VPORT_FABRIC_LOGOUT:
	case FC_VPORT_FABRIC_REJ_WWN:
	case FC_VPORT_FAILED:
		vport->port_state = LPFC_VPORT_FAILED;
		break;
	case FC_VPORT_LINKDOWN:
		vport->port_state = LPFC_VPORT_UNKNOWN;
		break;
	default:
		/* do nothing */
		break;
	}
}

static int
lpfc_alloc_vpi(struct lpfc_hba *phba)
{
	int  vpi;

	spin_lock_irq(&phba->hbalock);
	/* Start at bit 1 because vpi zero is reserved for the physical port */
	vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
	if (vpi > phba->max_vpi)
		vpi = 0;
	else
		set_bit(vpi, phba->vpi_bmask);
	if (phba->sli_rev == LPFC_SLI_REV4)
		phba->sli4_hba.max_cfg_param.vpi_used++;
	spin_unlock_irq(&phba->hbalock);
	return vpi;
}

static void
lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
{
	if (vpi == 0)
		return;
	spin_lock_irq(&phba->hbalock);
	clear_bit(vpi, phba->vpi_bmask);
	if (phba->sli_rev == LPFC_SLI_REV4)
		phba->sli4_hba.max_cfg_param.vpi_used--;
	spin_unlock_irq(&phba->hbalock);
}

static int
lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
{
	LPFC_MBOXQ_t *pmb;
	MAILBOX_t *mb;
	struct lpfc_dmabuf *mp;
	int  rc;

	pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
	if (!pmb) {
		return -ENOMEM;
	}
	mb = &pmb->u.mb;

	lpfc_read_sparam(phba, pmb, vport->vpi);
	/*
	 * Grab buffer pointer and clear context1 so we can use
	 * lpfc_sli_issue_box_wait
	 */
	mp = (struct lpfc_dmabuf *) pmb->context1;
	pmb->context1 = NULL;

	pmb->vport = vport;
	rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
	if (rc != MBX_SUCCESS) {
		if (signal_pending(current)) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
					 "1830 Signal aborted mbxCmd x%x\n",
					 mb->mbxCommand);
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
			if (rc != MBX_TIMEOUT)
				mempool_free(pmb, phba->mbox_mem_pool);
			return -EINTR;
		} else {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
					 "1818 VPort failed init, mbxCmd x%x "
					 "READ_SPARM mbxStatus x%x, rc = x%x\n",
					 mb->mbxCommand, mb->mbxStatus, rc);
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
			if (rc != MBX_TIMEOUT)
				mempool_free(pmb, phba->mbox_mem_pool);
			return -EIO;
		}
	}

	memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
	memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
	       sizeof (struct lpfc_name));
	memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
	       sizeof (struct lpfc_name));

	lpfc_mbuf_free(phba, mp->virt, mp->phys);
	kfree(mp);
	mempool_free(pmb, phba->mbox_mem_pool);

	return 0;
}

static int
lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
		      const char *name_type)
{
				/* ensure that IEEE format 1 addresses
				 * contain zeros in bits 59-48
				 */
	if (!((wwn->u.wwn[0] >> 4) == 1 &&
	      ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
		return 1;

	lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
			"1822 Invalid %s: %02x:%02x:%02x:%02x:"
			"%02x:%02x:%02x:%02x\n",
			name_type,
			wwn->u.wwn[0], wwn->u.wwn[1],
			wwn->u.wwn[2], wwn->u.wwn[3],
			wwn->u.wwn[4], wwn->u.wwn[5],
			wwn->u.wwn[6], wwn->u.wwn[7]);
	return 0;
}

static int
lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
{
	struct lpfc_vport *vport;
	unsigned long flags;

	spin_lock_irqsave(&phba->hbalock, flags);
	list_for_each_entry(vport, &phba->port_list, listentry) {
		if (vport == new_vport)
			continue;
		/* If they match, return not unique */
		if (memcmp(&vport->fc_sparam.portName,
			   &new_vport->fc_sparam.portName,
			   sizeof(struct lpfc_name)) == 0) {
			spin_unlock_irqrestore(&phba->hbalock, flags);
			return 0;
		}
	}
	spin_unlock_irqrestore(&phba->hbalock, flags);
	return 1;
}

/**
 * lpfc_discovery_wait - Wait for driver discovery to quiesce
 * @vport: The virtual port for which this call is being executed.
 *
 * This driver calls this routine specifically from lpfc_vport_delete
 * to enforce a synchronous execution of vport
 * delete relative to discovery activities.  The
 * lpfc_vport_delete routine should not return until it
 * can reasonably guarantee that discovery has quiesced.
 * Post FDISC LOGO, the driver must wait until its SAN teardown is
 * complete and all resources recovered before allowing
 * cleanup.
 *
 * This routine does not require any locks held.
 **/
static void lpfc_discovery_wait(struct lpfc_vport *vport)
{
	struct lpfc_hba *phba = vport->phba;
	uint32_t wait_flags = 0;
	unsigned long wait_time_max;
	unsigned long start_time;

	wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
		     FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;

	/*
	 * The time constraint on this loop is a balance between the
	 * fabric RA_TOV value and dev_loss tmo.  The driver's
	 * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
	 */
	wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
	wait_time_max += jiffies;
	start_time = jiffies;
	while (time_before(jiffies, wait_time_max)) {
		if ((vport->num_disc_nodes > 0)    ||
		    (vport->fc_flag & wait_flags)  ||
		    ((vport->port_state > LPFC_VPORT_FAILED) &&
		     (vport->port_state < LPFC_VPORT_READY))) {
			lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
					"1833 Vport discovery quiesce Wait:"
					" state x%x fc_flags x%x"
					" num_nodes x%x, waiting 1000 msecs"
					" total wait msecs x%x\n",
					vport->port_state, vport->fc_flag,
					vport->num_disc_nodes,
					jiffies_to_msecs(jiffies - start_time));
			msleep(1000);
		} else {
			/* Base case.  Wait variants satisfied.  Break out */
			lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
					 "1834 Vport discovery quiesced:"
					 " state x%x fc_flags x%x"
					 " wait msecs x%x\n",
					 vport->port_state, vport->fc_flag,
					 jiffies_to_msecs(jiffies
						- start_time));
			break;
		}
	}

	if (time_after(jiffies, wait_time_max))
		lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
				"1835 Vport discovery quiesce failed:"
				" state x%x fc_flags x%x wait msecs x%x\n",
				vport->port_state, vport->fc_flag,
				jiffies_to_msecs(jiffies - start_time));
}

int
lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
{
	struct lpfc_nodelist *ndlp;
	struct Scsi_Host *shost = fc_vport->shost;
	struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = pport->phba;
	struct lpfc_vport *vport = NULL;
	int instance;
	int vpi;
	int rc = VPORT_ERROR;
	int status;

	if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
		lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
				"1808 Create VPORT failed: "
				"NPIV is not enabled: SLImode:%d\n",
				phba->sli_rev);
		rc = VPORT_INVAL;
		goto error_out;
	}

	vpi = lpfc_alloc_vpi(phba);
	if (vpi == 0) {
		lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
				"1809 Create VPORT failed: "
				"Max VPORTs (%d) exceeded\n",
				phba->max_vpi);
		rc = VPORT_NORESOURCES;
		goto error_out;
	}

	/*
	 * In SLI4, the vpi must be activated before it can be used
	 * by the port.
	 */
	if (phba->sli_rev == LPFC_SLI_REV4) {
		rc = lpfc_sli4_init_vpi(phba, vpi);
		if (rc) {
			lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
					"1838 Failed to INIT_VPI on vpi %d "
					"status %d\n", vpi, rc);
			rc = VPORT_NORESOURCES;
			lpfc_free_vpi(phba, vpi);
			goto error_out;
		}
	}

	/* Assign an unused board number */
	if ((instance = lpfc_get_instance()) < 0) {
		lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
				"1810 Create VPORT failed: Cannot get "
				"instance number\n");
		lpfc_free_vpi(phba, vpi);
		rc = VPORT_NORESOURCES;
		goto error_out;
	}

	vport = lpfc_create_port(phba, instance, &fc_vport->dev);
	if (!vport) {
		lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
				"1811 Create VPORT failed: vpi x%x\n", vpi);
		lpfc_free_vpi(phba, vpi);
		rc = VPORT_NORESOURCES;
		goto error_out;
	}

	vport->vpi = vpi;
	lpfc_debugfs_initialize(vport);

	if ((status = lpfc_vport_sparm(phba, vport))) {
		if (status == -EINTR) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
					 "1831 Create VPORT Interrupted.\n");
			rc = VPORT_ERROR;
		} else {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
					 "1813 Create VPORT failed. "
					 "Cannot get sparam\n");
			rc = VPORT_NORESOURCES;
		}
		lpfc_free_vpi(phba, vpi);
		destroy_port(vport);
		goto error_out;
	}

	memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
	memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
	if (fc_vport->node_name != 0)
		u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
	if (fc_vport->port_name != 0)
		u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);

	memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
	memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);

	if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
	    !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
				 "1821 Create VPORT failed. "
				 "Invalid WWN format\n");
		lpfc_free_vpi(phba, vpi);
		destroy_port(vport);
		rc = VPORT_INVAL;
		goto error_out;
	}

	if (!lpfc_unique_wwpn(phba, vport)) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
				 "1823 Create VPORT failed. "
				 "Duplicate WWN on HBA\n");
		lpfc_free_vpi(phba, vpi);
		destroy_port(vport);
		rc = VPORT_INVAL;
		goto error_out;
	}

	/* Create binary sysfs attribute for vport */
	lpfc_alloc_sysfs_attr(vport);

	*(struct lpfc_vport **)fc_vport->dd_data = vport;
	vport->fc_vport = fc_vport;

	if ((phba->link_state < LPFC_LINK_UP) ||
	    (phba->fc_topology == TOPOLOGY_LOOP)) {
		lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
		rc = VPORT_OK;
		goto out;
	}

	if (disable) {
		lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
		rc = VPORT_OK;
		goto out;
	}

	/* Use the Physical nodes Fabric NDLP to determine if the link is
	 * up and ready to FDISC.
	 */
	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
	if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
	    ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
		if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
			lpfc_set_disctmo(vport);
			lpfc_initial_fdisc(vport);
		} else {
			lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
					 "0262 No NPIV Fabric support\n");
		}
	} else {
		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
	}
	rc = VPORT_OK;

out:
	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
			"1825 Vport Created.\n");
	lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
error_out:
	return rc;
}

static int
disable_vport(struct fc_vport *fc_vport)
{
	struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
	struct lpfc_hba   *phba = vport->phba;
	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
	long timeout;

	ndlp = lpfc_findnode_did(vport, Fabric_DID);
	if (ndlp && NLP_CHK_NODE_ACT(ndlp)
	    && phba->link_state >= LPFC_LINK_UP) {
		vport->unreg_vpi_cmpl = VPORT_INVAL;
		timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
		if (!lpfc_issue_els_npiv_logo(vport, ndlp))
			while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
				timeout = schedule_timeout(timeout);
	}

	lpfc_sli_host_down(vport);

	/* Mark all nodes for discovery so we can remove them by
	 * calling lpfc_cleanup_rpis(vport, 1)
	 */
	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
		if (!NLP_CHK_NODE_ACT(ndlp))
			continue;
		if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
			continue;
		lpfc_disc_state_machine(vport, ndlp, NULL,
					NLP_EVT_DEVICE_RECOVERY);
	}
	lpfc_cleanup_rpis(vport, 1);

	lpfc_stop_vport_timers(vport);
	lpfc_unreg_all_rpis(vport);
	lpfc_unreg_default_rpis(vport);
	/*
	 * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
	 * scsi_host_put() to release the vport.
	 */
	lpfc_mbx_unreg_vpi(vport);

	lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
			 "1826 Vport Disabled.\n");
	return VPORT_OK;
}

static int
enable_vport(struct fc_vport *fc_vport)
{
	struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
	struct lpfc_hba   *phba = vport->phba;
	struct lpfc_nodelist *ndlp = NULL;

	if ((phba->link_state < LPFC_LINK_UP) ||
	    (phba->fc_topology == TOPOLOGY_LOOP)) {
		lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
		return VPORT_OK;
	}

	vport->load_flag |= FC_LOADING;
	vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;

	/* Use the Physical nodes Fabric NDLP to determine if the link is
	 * up and ready to FDISC.
	 */
	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
	if (ndlp && NLP_CHK_NODE_ACT(ndlp)
	    && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
		if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
			lpfc_set_disctmo(vport);
			lpfc_initial_fdisc(vport);
		} else {
			lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
					 "0264 No NPIV Fabric support\n");
		}
	} else {
		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
	}
	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
			 "1827 Vport Enabled.\n");
	return VPORT_OK;
}

int
lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
{
	if (disable)
		return disable_vport(fc_vport);
	else
		return enable_vport(fc_vport);
}


int
lpfc_vport_delete(struct fc_vport *fc_vport)
{
	struct lpfc_nodelist *ndlp = NULL;
	struct Scsi_Host *shost = (struct Scsi_Host *) fc_vport->shost;
	struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
	struct lpfc_hba   *phba = vport->phba;
	long timeout;

	if (vport->port_type == LPFC_PHYSICAL_PORT) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
				 "1812 vport_delete failed: Cannot delete "
				 "physical host\n");
		return VPORT_ERROR;
	}

	/* If the vport is a static vport fail the deletion. */
	if ((vport->vport_flag & STATIC_VPORT) &&
		!(phba->pport->load_flag & FC_UNLOADING)) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
				 "1837 vport_delete failed: Cannot delete "
				 "static vport.\n");
		return VPORT_ERROR;
	}

	/*
	 * If we are not unloading the driver then prevent the vport_delete
	 * from happening until after this vport's discovery is finished.
	 */
	if (!(phba->pport->load_flag & FC_UNLOADING)) {
		int check_count = 0;
		while (check_count < ((phba->fc_ratov * 3) + 3) &&
		       vport->port_state > LPFC_VPORT_FAILED &&
		       vport->port_state < LPFC_VPORT_READY) {
			check_count++;
			msleep(1000);
		}
		if (vport->port_state > LPFC_VPORT_FAILED &&
		    vport->port_state < LPFC_VPORT_READY)
			return -EAGAIN;
	}
	/*
	 * This is a bit of a mess.  We want to ensure the shost doesn't get
	 * torn down until we're done with the embedded lpfc_vport structure.
	 *
	 * Beyond holding a reference for this function, we also need a
	 * reference for outstanding I/O requests we schedule during delete
	 * processing.  But once we scsi_remove_host() we can no longer obtain
	 * a reference through scsi_host_get().
	 *
	 * So we take two references here.  We release one reference at the
	 * bottom of the function -- after delinking the vport.  And we
	 * release the other at the completion of the unreg_vpi that get's
	 * initiated after we've disposed of all other resources associated
	 * with the port.
	 */
	if (!scsi_host_get(shost))
		return VPORT_INVAL;
	if (!scsi_host_get(shost)) {
		scsi_host_put(shost);
		return VPORT_INVAL;
	}
	spin_lock_irq(&phba->hbalock);
	vport->load_flag |= FC_UNLOADING;
	spin_unlock_irq(&phba->hbalock);

	lpfc_free_sysfs_attr(vport);

	lpfc_debugfs_terminate(vport);

	/* Remove FC host and then SCSI host with the vport */
	fc_remove_host(lpfc_shost_from_vport(vport));
	scsi_remove_host(lpfc_shost_from_vport(vport));

	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);

	/* In case of driver unload, we shall not perform fabric logo as the
	 * worker thread already stopped at this stage and, in this case, we
	 * can safely skip the fabric logo.
	 */
	if (phba->pport->load_flag & FC_UNLOADING) {
		if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
		    ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
		    phba->link_state >= LPFC_LINK_UP) {
			/* First look for the Fabric ndlp */
			ndlp = lpfc_findnode_did(vport, Fabric_DID);
			if (!ndlp)
				goto skip_logo;
			else if (!NLP_CHK_NODE_ACT(ndlp)) {
				ndlp = lpfc_enable_node(vport, ndlp,
							NLP_STE_UNUSED_NODE);
				if (!ndlp)
					goto skip_logo;
			}
			/* Remove ndlp from vport npld list */
			lpfc_dequeue_node(vport, ndlp);

			/* Indicate free memory when release */
			spin_lock_irq(&phba->ndlp_lock);
			NLP_SET_FREE_REQ(ndlp);
			spin_unlock_irq(&phba->ndlp_lock);
			/* Kick off release ndlp when it can be safely done */
			lpfc_nlp_put(ndlp);
		}
		goto skip_logo;
	}

	/* Otherwise, we will perform fabric logo as needed */
	if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
	    ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
	    phba->link_state >= LPFC_LINK_UP &&
	    phba->fc_topology != TOPOLOGY_LOOP) {
		if (vport->cfg_enable_da_id) {
			timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
			if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
				while (vport->ct_flags && timeout)
					timeout = schedule_timeout(timeout);
			else
				lpfc_printf_log(vport->phba, KERN_WARNING,
						LOG_VPORT,
						"1829 CT command failed to "
						"delete objects on fabric. \n");
		}
		/* First look for the Fabric ndlp */
		ndlp = lpfc_findnode_did(vport, Fabric_DID);
		if (!ndlp) {
			/* Cannot find existing Fabric ndlp, allocate one */
			ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
			if (!ndlp)
				goto skip_logo;
			lpfc_nlp_init(vport, ndlp, Fabric_DID);
			/* Indicate free memory when release */
			NLP_SET_FREE_REQ(ndlp);
		} else {
			if (!NLP_CHK_NODE_ACT(ndlp))
				ndlp = lpfc_enable_node(vport, ndlp,
						NLP_STE_UNUSED_NODE);
				if (!ndlp)
					goto skip_logo;

			/* Remove ndlp from vport npld list */
			lpfc_dequeue_node(vport, ndlp);
			spin_lock_irq(&phba->ndlp_lock);
			if (!NLP_CHK_FREE_REQ(ndlp))
				/* Indicate free memory when release */
				NLP_SET_FREE_REQ(ndlp);
			else {
				/* Skip this if ndlp is already in free mode */
				spin_unlock_irq(&phba->ndlp_lock);
				goto skip_logo;
			}
			spin_unlock_irq(&phba->ndlp_lock);
		}
		vport->unreg_vpi_cmpl = VPORT_INVAL;
		timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
		if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
			goto skip_logo;
		if (!lpfc_issue_els_npiv_logo(vport, ndlp))
			while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
				timeout = schedule_timeout(timeout);
	}

	if (!(phba->pport->load_flag & FC_UNLOADING))
		lpfc_discovery_wait(vport);

skip_logo:
	lpfc_cleanup(vport);
	lpfc_sli_host_down(vport);

	lpfc_stop_vport_timers(vport);

	if (!(phba->pport->load_flag & FC_UNLOADING)) {
		lpfc_unreg_all_rpis(vport);
		lpfc_unreg_default_rpis(vport);
		/*
		 * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
		 * does the scsi_host_put() to release the vport.
		 */
		if (lpfc_mbx_unreg_vpi(vport))
			scsi_host_put(shost);
	} else
		scsi_host_put(shost);

	lpfc_free_vpi(phba, vport->vpi);
	vport->work_port_events = 0;
	spin_lock_irq(&phba->hbalock);
	list_del_init(&vport->listentry);
	spin_unlock_irq(&phba->hbalock);
	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
			 "1828 Vport Deleted.\n");
	scsi_host_put(shost);
	return VPORT_OK;
}

struct lpfc_vport **
lpfc_create_vport_work_array(struct lpfc_hba *phba)
{
	struct lpfc_vport *port_iterator;
	struct lpfc_vport **vports;
	int index = 0;
	vports = kzalloc((phba->max_vports + 1) * sizeof(struct lpfc_vport *),
			 GFP_KERNEL);
	if (vports == NULL)
		return NULL;
	spin_lock_irq(&phba->hbalock);
	list_for_each_entry(port_iterator, &phba->port_list, listentry) {
		if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
			lpfc_printf_vlog(port_iterator, KERN_WARNING, LOG_VPORT,
					 "1801 Create vport work array FAILED: "
					 "cannot do scsi_host_get\n");
			continue;
		}
		vports[index++] = port_iterator;
	}
	spin_unlock_irq(&phba->hbalock);
	return vports;
}

void
lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
{
	int i;
	if (vports == NULL)
		return;
	for (i = 0; vports[i] != NULL && i <= phba->max_vports; i++)
		scsi_host_put(lpfc_shost_from_vport(vports[i]));
	kfree(vports);
}


/**
 * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
 * @vport: Pointer to vport object.
 *
 * This function resets the statistical data for the vport. This function
 * is called with the host_lock held
 **/
void
lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
{
	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;

	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
		if (!NLP_CHK_NODE_ACT(ndlp))
			continue;
		if (ndlp->lat_data)
			memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
				sizeof(struct lpfc_scsicmd_bkt));
	}
}


/**
 * lpfc_alloc_bucket - Allocate data buffer required for statistical data
 * @vport: Pointer to vport object.
 *
 * This function allocates data buffer required for all the FC
 * nodes of the vport to collect statistical data.
 **/
void
lpfc_alloc_bucket(struct lpfc_vport *vport)
{
	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;

	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
		if (!NLP_CHK_NODE_ACT(ndlp))
			continue;

		kfree(ndlp->lat_data);
		ndlp->lat_data = NULL;

		if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
			ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
					 sizeof(struct lpfc_scsicmd_bkt),
					 GFP_ATOMIC);

			if (!ndlp->lat_data)
				lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
					"0287 lpfc_alloc_bucket failed to "
					"allocate statistical data buffer DID "
					"0x%x\n", ndlp->nlp_DID);
		}
	}
}

/**
 * lpfc_free_bucket - Free data buffer required for statistical data
 * @vport: Pointer to vport object.
 *
 * Th function frees statistical data buffer of all the FC
 * nodes of the vport.
 **/
void
lpfc_free_bucket(struct lpfc_vport *vport)
{
	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;

	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
		if (!NLP_CHK_NODE_ACT(ndlp))
			continue;

		kfree(ndlp->lat_data);
		ndlp->lat_data = NULL;
	}
}
OpenPOWER on IntegriCloud