summaryrefslogtreecommitdiff
path: root/drivers/scsi/csiostor/csio_attr.c
blob: 065a87ace623b458a87bf177532a0dfafda67dbe (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
/*
 * This file is part of the Chelsio FCoE driver for Linux.
 *
 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/mm.h>
#include <linux/jiffies.h>
#include <scsi/fc/fc_fs.h>

#include "csio_init.h"

static void
csio_vport_set_state(struct csio_lnode *ln);

/*
 * csio_reg_rnode - Register a remote port with FC transport.
 * @rn: Rnode representing remote port.
 *
 * Call fc_remote_port_add() to register this remote port with FC transport.
 * If remote port is Initiator OR Target OR both, change the role appropriately.
 *
 */
void
csio_reg_rnode(struct csio_rnode *rn)
{
	struct csio_lnode *ln		= csio_rnode_to_lnode(rn);
	struct Scsi_Host *shost		= csio_ln_to_shost(ln);
	struct fc_rport_identifiers ids;
	struct fc_rport  *rport;
	struct csio_service_parms *sp;

	ids.node_name	= wwn_to_u64(csio_rn_wwnn(rn));
	ids.port_name	= wwn_to_u64(csio_rn_wwpn(rn));
	ids.port_id	= rn->nport_id;
	ids.roles	= FC_RPORT_ROLE_UNKNOWN;

	if (rn->role & CSIO_RNFR_INITIATOR || rn->role & CSIO_RNFR_TARGET) {
		rport = rn->rport;
		CSIO_ASSERT(rport != NULL);
		goto update_role;
	}

	rn->rport = fc_remote_port_add(shost, 0, &ids);
	if (!rn->rport) {
		csio_ln_err(ln, "Failed to register rport = 0x%x.\n",
					rn->nport_id);
		return;
	}

	ln->num_reg_rnodes++;
	rport = rn->rport;
	spin_lock_irq(shost->host_lock);
	*((struct csio_rnode **)rport->dd_data) = rn;
	spin_unlock_irq(shost->host_lock);

	sp = &rn->rn_sparm;
	rport->maxframe_size = ntohs(sp->csp.sp_bb_data);
	if (ntohs(sp->clsp[2].cp_class) & FC_CPC_VALID)
		rport->supported_classes = FC_COS_CLASS3;
	else
		rport->supported_classes = FC_COS_UNSPECIFIED;
update_role:
	if (rn->role & CSIO_RNFR_INITIATOR)
		ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
	if (rn->role & CSIO_RNFR_TARGET)
		ids.roles |= FC_RPORT_ROLE_FCP_TARGET;

	if (ids.roles != FC_RPORT_ROLE_UNKNOWN)
		fc_remote_port_rolechg(rport, ids.roles);

	rn->scsi_id = rport->scsi_target_id;

	csio_ln_dbg(ln, "Remote port x%x role 0x%x registered\n",
		rn->nport_id, ids.roles);
}

/*
 * csio_unreg_rnode - Unregister a remote port with FC transport.
 * @rn: Rnode representing remote port.
 *
 * Call fc_remote_port_delete() to unregister this remote port with FC
 * transport.
 *
 */
void
csio_unreg_rnode(struct csio_rnode *rn)
{
	struct csio_lnode *ln = csio_rnode_to_lnode(rn);
	struct fc_rport *rport = rn->rport;

	rn->role &= ~(CSIO_RNFR_INITIATOR | CSIO_RNFR_TARGET);
	fc_remote_port_delete(rport);
	ln->num_reg_rnodes--;

	csio_ln_dbg(ln, "Remote port x%x un-registered\n", rn->nport_id);
}

/*
 * csio_lnode_async_event - Async events from local port.
 * @ln: lnode representing local port.
 *
 * Async events from local node that FC transport/SCSI ML
 * should be made aware of (Eg: RSCN).
 */
void
csio_lnode_async_event(struct csio_lnode *ln, enum csio_ln_fc_evt fc_evt)
{
	switch (fc_evt) {
	case CSIO_LN_FC_RSCN:
		/* Get payload of rscn from ln */
		/* For each RSCN entry */
			/*
			 * fc_host_post_event(shost,
			 *		      fc_get_event_number(),
			 *		      FCH_EVT_RSCN,
			 *		      rscn_entry);
			 */
		break;
	case CSIO_LN_FC_LINKUP:
		/* send fc_host_post_event */
		/* set vport state */
		if (csio_is_npiv_ln(ln))
			csio_vport_set_state(ln);

		break;
	case CSIO_LN_FC_LINKDOWN:
		/* send fc_host_post_event */
		/* set vport state */
		if (csio_is_npiv_ln(ln))
			csio_vport_set_state(ln);

		break;
	case CSIO_LN_FC_ATTRIB_UPDATE:
		csio_fchost_attr_init(ln);
		break;
	default:
		break;
	}
}

/*
 * csio_fchost_attr_init - Initialize FC transport attributes
 * @ln: Lnode.
 *
 */
void
csio_fchost_attr_init(struct csio_lnode *ln)
{
	struct Scsi_Host  *shost = csio_ln_to_shost(ln);

	fc_host_node_name(shost) = wwn_to_u64(csio_ln_wwnn(ln));
	fc_host_port_name(shost) = wwn_to_u64(csio_ln_wwpn(ln));

	fc_host_supported_classes(shost) = FC_COS_CLASS3;
	fc_host_max_npiv_vports(shost) =
			(csio_lnode_to_hw(ln))->fres_info.max_vnps;
	fc_host_supported_speeds(shost) = FC_PORTSPEED_10GBIT |
		FC_PORTSPEED_1GBIT;

	fc_host_maxframe_size(shost) = ntohs(ln->ln_sparm.csp.sp_bb_data);
	memset(fc_host_supported_fc4s(shost), 0,
		sizeof(fc_host_supported_fc4s(shost)));
	fc_host_supported_fc4s(shost)[7] = 1;

	memset(fc_host_active_fc4s(shost), 0,
		sizeof(fc_host_active_fc4s(shost)));
	fc_host_active_fc4s(shost)[7] = 1;
}

/*
 * csio_get_host_port_id - sysfs entries for nport_id is
 * populated/cached from this function
 */
static void
csio_get_host_port_id(struct Scsi_Host *shost)
{
	struct csio_lnode *ln	= shost_priv(shost);
	struct csio_hw *hw = csio_lnode_to_hw(ln);

	spin_lock_irq(&hw->lock);
	fc_host_port_id(shost) = ln->nport_id;
	spin_unlock_irq(&hw->lock);
}

/*
 * csio_get_port_type - Return FC local port type.
 * @shost: scsi host.
 *
 */
static void
csio_get_host_port_type(struct Scsi_Host *shost)
{
	struct csio_lnode *ln = shost_priv(shost);
	struct csio_hw *hw = csio_lnode_to_hw(ln);

	spin_lock_irq(&hw->lock);
	if (csio_is_npiv_ln(ln))
		fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
	else
		fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
	spin_unlock_irq(&hw->lock);
}

/*
 * csio_get_port_state - Return FC local port state.
 * @shost: scsi host.
 *
 */
static void
csio_get_host_port_state(struct Scsi_Host *shost)
{
	struct csio_lnode *ln = shost_priv(shost);
	struct csio_hw *hw = csio_lnode_to_hw(ln);
	char state[16];

	spin_lock_irq(&hw->lock);

	csio_lnode_state_to_str(ln, state);
	if (!strcmp(state, "READY"))
		fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
	else if (!strcmp(state, "OFFLINE"))
		fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
	else
		fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;

	spin_unlock_irq(&hw->lock);
}

/*
 * csio_get_host_speed - Return link speed to FC transport.
 * @shost: scsi host.
 *
 */
static void
csio_get_host_speed(struct Scsi_Host *shost)
{
	struct csio_lnode *ln = shost_priv(shost);
	struct csio_hw *hw = csio_lnode_to_hw(ln);

	spin_lock_irq(&hw->lock);
	switch (hw->pport[ln->portid].link_speed) {
	case FW_PORT_CAP_SPEED_1G:
		fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
		break;
	case FW_PORT_CAP_SPEED_10G:
		fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
		break;
	default:
		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
		break;
	}
	spin_unlock_irq(&hw->lock);
}

/*
 * csio_get_host_fabric_name - Return fabric name
 * @shost: scsi host.
 *
 */
static void
csio_get_host_fabric_name(struct Scsi_Host *shost)
{
	struct csio_lnode *ln = shost_priv(shost);
	struct csio_rnode *rn = NULL;
	struct csio_hw *hw = csio_lnode_to_hw(ln);

	spin_lock_irq(&hw->lock);
	rn = csio_rnode_lookup_portid(ln, FC_FID_FLOGI);
	if (rn)
		fc_host_fabric_name(shost) = wwn_to_u64(csio_rn_wwnn(rn));
	else
		fc_host_fabric_name(shost) = 0;
	spin_unlock_irq(&hw->lock);
}

/*
 * csio_get_host_speed - Return FC transport statistics.
 * @ln: Lnode.
 *
 */
static struct fc_host_statistics *
csio_get_stats(struct Scsi_Host *shost)
{
	struct csio_lnode *ln = shost_priv(shost);
	struct csio_hw *hw = csio_lnode_to_hw(ln);
	struct fc_host_statistics *fhs = &ln->fch_stats;
	struct fw_fcoe_port_stats fcoe_port_stats;
	uint64_t seconds;

	memset(&fcoe_port_stats, 0, sizeof(struct fw_fcoe_port_stats));
	csio_get_phy_port_stats(hw, ln->portid, &fcoe_port_stats);

	fhs->tx_frames  += (be64_to_cpu(fcoe_port_stats.tx_bcast_frames) +
			    be64_to_cpu(fcoe_port_stats.tx_mcast_frames) +
			    be64_to_cpu(fcoe_port_stats.tx_ucast_frames) +
			    be64_to_cpu(fcoe_port_stats.tx_offload_frames));
	fhs->tx_words  += (be64_to_cpu(fcoe_port_stats.tx_bcast_bytes) +
			   be64_to_cpu(fcoe_port_stats.tx_mcast_bytes) +
			   be64_to_cpu(fcoe_port_stats.tx_ucast_bytes) +
			   be64_to_cpu(fcoe_port_stats.tx_offload_bytes)) /
							CSIO_WORD_TO_BYTE;
	fhs->rx_frames += (be64_to_cpu(fcoe_port_stats.rx_bcast_frames) +
			   be64_to_cpu(fcoe_port_stats.rx_mcast_frames) +
			   be64_to_cpu(fcoe_port_stats.rx_ucast_frames));
	fhs->rx_words += (be64_to_cpu(fcoe_port_stats.rx_bcast_bytes) +
			  be64_to_cpu(fcoe_port_stats.rx_mcast_bytes) +
			  be64_to_cpu(fcoe_port_stats.rx_ucast_bytes)) /
							CSIO_WORD_TO_BYTE;
	fhs->error_frames += be64_to_cpu(fcoe_port_stats.rx_err_frames);
	fhs->fcp_input_requests +=  ln->stats.n_input_requests;
	fhs->fcp_output_requests +=  ln->stats.n_output_requests;
	fhs->fcp_control_requests +=  ln->stats.n_control_requests;
	fhs->fcp_input_megabytes +=  ln->stats.n_input_bytes >> 20;
	fhs->fcp_output_megabytes +=  ln->stats.n_output_bytes >> 20;
	fhs->link_failure_count = ln->stats.n_link_down;
	/* Reset stats for the device */
	seconds = jiffies_to_msecs(jiffies) - hw->stats.n_reset_start;
	do_div(seconds, 1000);
	fhs->seconds_since_last_reset = seconds;

	return fhs;
}

/*
 * csio_set_rport_loss_tmo - Set the rport dev loss timeout
 * @rport: fc rport.
 * @timeout: new value for dev loss tmo.
 *
 * If timeout is non zero set the dev_loss_tmo to timeout, else set
 * dev_loss_tmo to one.
 */
static void
csio_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
{
	if (timeout)
		rport->dev_loss_tmo = timeout;
	else
		rport->dev_loss_tmo = 1;
}

static void
csio_vport_set_state(struct csio_lnode *ln)
{
	struct fc_vport *fc_vport = ln->fc_vport;
	struct csio_lnode  *pln = ln->pln;
	char state[16];

	/* Set fc vport state based on phyiscal lnode */
	csio_lnode_state_to_str(pln, state);
	if (strcmp(state, "READY")) {
		fc_vport_set_state(fc_vport, FC_VPORT_LINKDOWN);
		return;
	}

	if (!(pln->flags & CSIO_LNF_NPIVSUPP)) {
		fc_vport_set_state(fc_vport, FC_VPORT_NO_FABRIC_SUPP);
		return;
	}

	/* Set fc vport state based on virtual lnode */
	csio_lnode_state_to_str(ln, state);
	if (strcmp(state, "READY")) {
		fc_vport_set_state(fc_vport, FC_VPORT_LINKDOWN);
		return;
	}
	fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
}

static int
csio_fcoe_alloc_vnp(struct csio_hw *hw, struct csio_lnode *ln)
{
	struct csio_lnode *pln;
	struct csio_mb  *mbp;
	struct fw_fcoe_vnp_cmd *rsp;
	int ret = 0;
	int retry = 0;

	/* Issue VNP cmd to alloc vport */
	/* Allocate Mbox request */
	spin_lock_irq(&hw->lock);
	mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
	if (!mbp) {
		CSIO_INC_STATS(hw, n_err_nomem);
		ret = -ENOMEM;
		goto out;
	}

	pln = ln->pln;
	ln->fcf_flowid = pln->fcf_flowid;
	ln->portid = pln->portid;

	csio_fcoe_vnp_alloc_init_mb(ln, mbp, CSIO_MB_DEFAULT_TMO,
				    pln->fcf_flowid, pln->vnp_flowid, 0,
				    csio_ln_wwnn(ln), csio_ln_wwpn(ln), NULL);

	for (retry = 0; retry < 3; retry++) {
		/* FW is expected to complete vnp cmd in immediate mode
		 * without much delay.
		 * Otherwise, there will be increase in IO latency since HW
		 * lock is held till completion of vnp mbox cmd.
		 */
		ret = csio_mb_issue(hw, mbp);
		if (ret != -EBUSY)
			break;

		/* Retry if mbox returns busy */
		spin_unlock_irq(&hw->lock);
		msleep(2000);
		spin_lock_irq(&hw->lock);
	}

	if (ret) {
		csio_ln_err(ln, "Failed to issue mbox FCoE VNP command\n");
		goto out_free;
	}

	/* Process Mbox response of VNP command */
	rsp = (struct fw_fcoe_vnp_cmd *)(mbp->mb);
	if (FW_CMD_RETVAL_GET(ntohl(rsp->alloc_to_len16)) != FW_SUCCESS) {
		csio_ln_err(ln, "FCOE VNP ALLOC cmd returned 0x%x!\n",
			    FW_CMD_RETVAL_GET(ntohl(rsp->alloc_to_len16)));
		ret = -EINVAL;
		goto out_free;
	}

	ln->vnp_flowid = FW_FCOE_VNP_CMD_VNPI_GET(
				ntohl(rsp->gen_wwn_to_vnpi));
	memcpy(csio_ln_wwnn(ln), rsp->vnport_wwnn, 8);
	memcpy(csio_ln_wwpn(ln), rsp->vnport_wwpn, 8);

	csio_ln_dbg(ln, "FCOE VNPI: 0x%x\n", ln->vnp_flowid);
	csio_ln_dbg(ln, "\tWWNN: %x%x%x%x%x%x%x%x\n",
		    ln->ln_sparm.wwnn[0], ln->ln_sparm.wwnn[1],
		    ln->ln_sparm.wwnn[2], ln->ln_sparm.wwnn[3],
		    ln->ln_sparm.wwnn[4], ln->ln_sparm.wwnn[5],
		    ln->ln_sparm.wwnn[6], ln->ln_sparm.wwnn[7]);
	csio_ln_dbg(ln, "\tWWPN: %x%x%x%x%x%x%x%x\n",
		    ln->ln_sparm.wwpn[0], ln->ln_sparm.wwpn[1],
		    ln->ln_sparm.wwpn[2], ln->ln_sparm.wwpn[3],
		    ln->ln_sparm.wwpn[4], ln->ln_sparm.wwpn[5],
		    ln->ln_sparm.wwpn[6], ln->ln_sparm.wwpn[7]);

out_free:
	mempool_free(mbp, hw->mb_mempool);
out:
	spin_unlock_irq(&hw->lock);
	return ret;
}

static int
csio_fcoe_free_vnp(struct csio_hw *hw, struct csio_lnode *ln)
{
	struct csio_lnode *pln;
	struct csio_mb  *mbp;
	struct fw_fcoe_vnp_cmd *rsp;
	int ret = 0;
	int retry = 0;

	/* Issue VNP cmd to free vport */
	/* Allocate Mbox request */

	spin_lock_irq(&hw->lock);
	mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
	if (!mbp) {
		CSIO_INC_STATS(hw, n_err_nomem);
		ret = -ENOMEM;
		goto out;
	}

	pln = ln->pln;

	csio_fcoe_vnp_free_init_mb(ln, mbp, CSIO_MB_DEFAULT_TMO,
				   ln->fcf_flowid, ln->vnp_flowid,
				   NULL);

	for (retry = 0; retry < 3; retry++) {
		ret = csio_mb_issue(hw, mbp);
		if (ret != -EBUSY)
			break;

		/* Retry if mbox returns busy */
		spin_unlock_irq(&hw->lock);
		msleep(2000);
		spin_lock_irq(&hw->lock);
	}

	if (ret) {
		csio_ln_err(ln, "Failed to issue mbox FCoE VNP command\n");
		goto out_free;
	}

	/* Process Mbox response of VNP command */
	rsp = (struct fw_fcoe_vnp_cmd *)(mbp->mb);
	if (FW_CMD_RETVAL_GET(ntohl(rsp->alloc_to_len16)) != FW_SUCCESS) {
		csio_ln_err(ln, "FCOE VNP FREE cmd returned 0x%x!\n",
			    FW_CMD_RETVAL_GET(ntohl(rsp->alloc_to_len16)));
		ret = -EINVAL;
	}

out_free:
	mempool_free(mbp, hw->mb_mempool);
out:
	spin_unlock_irq(&hw->lock);
	return ret;
}

static int
csio_vport_create(struct fc_vport *fc_vport, bool disable)
{
	struct Scsi_Host *shost = fc_vport->shost;
	struct csio_lnode *pln = shost_priv(shost);
	struct csio_lnode *ln = NULL;
	struct csio_hw *hw = csio_lnode_to_hw(pln);
	uint8_t wwn[8];
	int ret = -1;

	ln = csio_shost_init(hw, &fc_vport->dev, false, pln);
	if (!ln)
		goto error;

	if (fc_vport->node_name != 0) {
		u64_to_wwn(fc_vport->node_name, wwn);

		if (!CSIO_VALID_WWN(wwn)) {
			csio_ln_err(ln,
				    "vport create failed. Invalid wwnn\n");
			goto error;
		}
		memcpy(csio_ln_wwnn(ln), wwn, 8);
	}

	if (fc_vport->port_name != 0) {
		u64_to_wwn(fc_vport->port_name, wwn);

		if (!CSIO_VALID_WWN(wwn)) {
			csio_ln_err(ln,
				    "vport create failed. Invalid wwpn\n");
			goto error;
		}

		if (csio_lnode_lookup_by_wwpn(hw, wwn)) {
			csio_ln_err(ln,
			    "vport create failed. wwpn already exists\n");
			goto error;
		}
		memcpy(csio_ln_wwpn(ln), wwn, 8);
	}

	fc_vport_set_state(fc_vport, FC_VPORT_INITIALIZING);

	if (csio_fcoe_alloc_vnp(hw, ln))
		goto error;

	*(struct csio_lnode **)fc_vport->dd_data = ln;
	ln->fc_vport = fc_vport;
	if (!fc_vport->node_name)
		fc_vport->node_name = wwn_to_u64(csio_ln_wwnn(ln));
	if (!fc_vport->port_name)
		fc_vport->port_name = wwn_to_u64(csio_ln_wwpn(ln));
	csio_fchost_attr_init(ln);
	return 0;
error:
	if (ln)
		csio_shost_exit(ln);

	return ret;
}

static int
csio_vport_delete(struct fc_vport *fc_vport)
{
	struct csio_lnode *ln = *(struct csio_lnode **)fc_vport->dd_data;
	struct Scsi_Host *shost = csio_ln_to_shost(ln);
	struct csio_hw *hw = csio_lnode_to_hw(ln);
	int rmv;

	spin_lock_irq(&hw->lock);
	rmv = csio_is_hw_removing(hw);
	spin_unlock_irq(&hw->lock);

	if (rmv) {
		csio_shost_exit(ln);
		return 0;
	}

	/* Quiesce ios and send remove event to lnode */
	scsi_block_requests(shost);
	spin_lock_irq(&hw->lock);
	csio_scsim_cleanup_io_lnode(csio_hw_to_scsim(hw), ln);
	csio_lnode_close(ln);
	spin_unlock_irq(&hw->lock);
	scsi_unblock_requests(shost);

	/* Free vnp */
	if (fc_vport->vport_state !=  FC_VPORT_DISABLED)
		csio_fcoe_free_vnp(hw, ln);

	csio_shost_exit(ln);
	return 0;
}

static int
csio_vport_disable(struct fc_vport *fc_vport, bool disable)
{
	struct csio_lnode *ln = *(struct csio_lnode **)fc_vport->dd_data;
	struct Scsi_Host *shost = csio_ln_to_shost(ln);
	struct csio_hw *hw = csio_lnode_to_hw(ln);

	/* disable vport */
	if (disable) {
		/* Quiesce ios and send stop event to lnode */
		scsi_block_requests(shost);
		spin_lock_irq(&hw->lock);
		csio_scsim_cleanup_io_lnode(csio_hw_to_scsim(hw), ln);
		csio_lnode_stop(ln);
		spin_unlock_irq(&hw->lock);
		scsi_unblock_requests(shost);

		/* Free vnp */
		csio_fcoe_free_vnp(hw, ln);
		fc_vport_set_state(fc_vport, FC_VPORT_DISABLED);
		csio_ln_err(ln, "vport disabled\n");
		return 0;
	} else {
		/* enable vport */
		fc_vport_set_state(fc_vport, FC_VPORT_INITIALIZING);
		if (csio_fcoe_alloc_vnp(hw, ln)) {
			csio_ln_err(ln, "vport enabled failed.\n");
			return -1;
		}
		csio_ln_err(ln, "vport enabled\n");
		return 0;
	}
}

static void
csio_dev_loss_tmo_callbk(struct fc_rport *rport)
{
	struct csio_rnode *rn;
	struct csio_hw *hw;
	struct csio_lnode *ln;

	rn = *((struct csio_rnode **)rport->dd_data);
	ln = csio_rnode_to_lnode(rn);
	hw = csio_lnode_to_hw(ln);

	spin_lock_irq(&hw->lock);

	/* return if driver is being removed or same rnode comes back online */
	if (csio_is_hw_removing(hw) || csio_is_rnode_ready(rn))
		goto out;

	csio_ln_dbg(ln, "devloss timeout on rnode:%p portid:x%x flowid:x%x\n",
		    rn, rn->nport_id, csio_rn_flowid(rn));

	CSIO_INC_STATS(ln, n_dev_loss_tmo);

	/*
	 * enqueue devloss event to event worker thread to serialize all
	 * rnode events.
	 */
	if (csio_enqueue_evt(hw, CSIO_EVT_DEV_LOSS, &rn, sizeof(rn))) {
		CSIO_INC_STATS(hw, n_evt_drop);
		goto out;
	}

	if (!(hw->flags & CSIO_HWF_FWEVT_PENDING)) {
		hw->flags |= CSIO_HWF_FWEVT_PENDING;
		spin_unlock_irq(&hw->lock);
		schedule_work(&hw->evtq_work);
		return;
	}

out:
	spin_unlock_irq(&hw->lock);
}

/* FC transport functions template - Physical port */
struct fc_function_template csio_fc_transport_funcs = {
	.show_host_node_name = 1,
	.show_host_port_name = 1,
	.show_host_supported_classes = 1,
	.show_host_supported_fc4s = 1,
	.show_host_maxframe_size = 1,

	.get_host_port_id = csio_get_host_port_id,
	.show_host_port_id = 1,

	.get_host_port_type = csio_get_host_port_type,
	.show_host_port_type = 1,

	.get_host_port_state = csio_get_host_port_state,
	.show_host_port_state = 1,

	.show_host_active_fc4s = 1,
	.get_host_speed = csio_get_host_speed,
	.show_host_speed = 1,
	.get_host_fabric_name = csio_get_host_fabric_name,
	.show_host_fabric_name = 1,

	.get_fc_host_stats = csio_get_stats,

	.dd_fcrport_size = sizeof(struct csio_rnode *),
	.show_rport_maxframe_size = 1,
	.show_rport_supported_classes = 1,

	.set_rport_dev_loss_tmo = csio_set_rport_loss_tmo,
	.show_rport_dev_loss_tmo = 1,

	.show_starget_port_id = 1,
	.show_starget_node_name = 1,
	.show_starget_port_name = 1,

	.dev_loss_tmo_callbk = csio_dev_loss_tmo_callbk,
	.dd_fcvport_size = sizeof(struct csio_lnode *),

	.vport_create = csio_vport_create,
	.vport_disable = csio_vport_disable,
	.vport_delete = csio_vport_delete,
};

/* FC transport functions template - Virtual  port */
struct fc_function_template csio_fc_transport_vport_funcs = {
	.show_host_node_name = 1,
	.show_host_port_name = 1,
	.show_host_supported_classes = 1,
	.show_host_supported_fc4s = 1,
	.show_host_maxframe_size = 1,

	.get_host_port_id = csio_get_host_port_id,
	.show_host_port_id = 1,

	.get_host_port_type = csio_get_host_port_type,
	.show_host_port_type = 1,

	.get_host_port_state = csio_get_host_port_state,
	.show_host_port_state = 1,
	.show_host_active_fc4s = 1,

	.get_host_speed = csio_get_host_speed,
	.show_host_speed = 1,

	.get_host_fabric_name = csio_get_host_fabric_name,
	.show_host_fabric_name = 1,

	.get_fc_host_stats = csio_get_stats,

	.dd_fcrport_size = sizeof(struct csio_rnode *),
	.show_rport_maxframe_size = 1,
	.show_rport_supported_classes = 1,

	.set_rport_dev_loss_tmo = csio_set_rport_loss_tmo,
	.show_rport_dev_loss_tmo = 1,

	.show_starget_port_id = 1,
	.show_starget_node_name = 1,
	.show_starget_port_name = 1,

	.dev_loss_tmo_callbk = csio_dev_loss_tmo_callbk,

};