summaryrefslogtreecommitdiff
path: root/include/scsi/scsi_transport_fc.h
blob: 3dcda19d35202538e63fe028bead4597bb2e8ddb (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
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *  FiberChannel transport specific attributes exported to sysfs.
 *
 *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
 *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
 *    Rewrite for host, target, device, and remote port attributes,
 *    statistics, and service functions...
 */
#ifndef SCSI_TRANSPORT_FC_H
#define SCSI_TRANSPORT_FC_H

#include <linux/sched.h>
#include <linux/bsg-lib.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_netlink.h>
#include <scsi/scsi_host.h>

struct scsi_transport_template;

/*
 * FC Port definitions - Following FC HBAAPI guidelines
 *
 * Note: Not all binary values for the different fields match HBAAPI.
 *  Instead, we use densely packed ordinal values or enums.
 *  We get away with this as we never present the actual binary values
 *  externally. For sysfs, we always present the string that describes
 *  the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
 *  to understand the values. The HBAAPI user-space library is free to
 *  convert the strings into the HBAAPI-specified binary values.
 *
 * Note: Not all HBAAPI-defined values are contained in the definitions
 *  below. Those not appropriate to an fc_host (e.g. FCP initiator) have
 *  been removed.
 */

/*
 * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
 * (for the ascii descriptions).
 */
enum fc_port_type {
	FC_PORTTYPE_UNKNOWN,
	FC_PORTTYPE_OTHER,
	FC_PORTTYPE_NOTPRESENT,
	FC_PORTTYPE_NPORT,		/* Attached to FPort */
	FC_PORTTYPE_NLPORT,		/* (Public) Loop w/ FLPort */
	FC_PORTTYPE_LPORT,		/* (Private) Loop w/o FLPort */
	FC_PORTTYPE_PTP,		/* Point to Point w/ another NPort */
	FC_PORTTYPE_NPIV,		/* VPORT based on NPIV */
};


/*
 * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
 * (for the ascii descriptions).
 */
enum fc_port_state {
	FC_PORTSTATE_UNKNOWN,
	FC_PORTSTATE_NOTPRESENT,
	FC_PORTSTATE_ONLINE,
	FC_PORTSTATE_OFFLINE,		/* User has taken Port Offline */
	FC_PORTSTATE_BLOCKED,
	FC_PORTSTATE_BYPASSED,
	FC_PORTSTATE_DIAGNOSTICS,
	FC_PORTSTATE_LINKDOWN,
	FC_PORTSTATE_ERROR,
	FC_PORTSTATE_LOOPBACK,
	FC_PORTSTATE_DELETED,
	FC_PORTSTATE_MARGINAL,
};


/*
 * fc_vport_state: If you alter this, you also need to alter
 * scsi_transport_fc.c (for the ascii descriptions).
 */
enum fc_vport_state {
	FC_VPORT_UNKNOWN,
	FC_VPORT_ACTIVE,
	FC_VPORT_DISABLED,
	FC_VPORT_LINKDOWN,
	FC_VPORT_INITIALIZING,
	FC_VPORT_NO_FABRIC_SUPP,
	FC_VPORT_NO_FABRIC_RSCS,
	FC_VPORT_FABRIC_LOGOUT,
	FC_VPORT_FABRIC_REJ_WWN,
	FC_VPORT_FAILED,
};



/*
 * FC Classes of Service
 * Note: values are not enumerated, as they can be "or'd" together
 * for reporting (e.g. report supported_classes). If you alter this list,
 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 */
#define FC_COS_UNSPECIFIED		0
#define FC_COS_CLASS1			2
#define FC_COS_CLASS2			4
#define FC_COS_CLASS3			8
#define FC_COS_CLASS4			0x10
#define FC_COS_CLASS6			0x40

/*
 * FC Port Speeds
 * Note: values are not enumerated, as they can be "or'd" together
 * for reporting (e.g. report supported_speeds). If you alter this list,
 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 */
#define FC_PORTSPEED_UNKNOWN		0 /* Unknown - transceiver
					     incapable of reporting */
#define FC_PORTSPEED_1GBIT		1
#define FC_PORTSPEED_2GBIT		2
#define FC_PORTSPEED_10GBIT		4
#define FC_PORTSPEED_4GBIT		8
#define FC_PORTSPEED_8GBIT		0x10
#define FC_PORTSPEED_16GBIT		0x20
#define FC_PORTSPEED_32GBIT		0x40
#define FC_PORTSPEED_20GBIT		0x80
#define FC_PORTSPEED_40GBIT		0x100
#define FC_PORTSPEED_50GBIT		0x200
#define FC_PORTSPEED_100GBIT		0x400
#define FC_PORTSPEED_25GBIT		0x800
#define FC_PORTSPEED_64GBIT		0x1000
#define FC_PORTSPEED_128GBIT		0x2000
#define FC_PORTSPEED_256GBIT		0x4000
#define FC_PORTSPEED_NOT_NEGOTIATED	(1 << 15) /* Speed not established */

/*
 * fc_tgtid_binding_type: If you alter this, you also need to alter
 * scsi_transport_fc.c (for the ascii descriptions).
 */
enum fc_tgtid_binding_type  {
	FC_TGTID_BIND_NONE,
	FC_TGTID_BIND_BY_WWPN,
	FC_TGTID_BIND_BY_WWNN,
	FC_TGTID_BIND_BY_ID,
};

/*
 * FC Port Roles
 * Note: values are not enumerated, as they can be "or'd" together
 * for reporting (e.g. report roles). If you alter this list,
 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 */
#define FC_PORT_ROLE_UNKNOWN			0x00
#define FC_PORT_ROLE_FCP_TARGET			0x01
#define FC_PORT_ROLE_FCP_INITIATOR		0x02
#define FC_PORT_ROLE_IP_PORT			0x04
#define FC_PORT_ROLE_FCP_DUMMY_INITIATOR	0x08
#define FC_PORT_ROLE_NVME_INITIATOR		0x10
#define FC_PORT_ROLE_NVME_TARGET		0x20
#define FC_PORT_ROLE_NVME_DISCOVERY		0x40

/* The following are for compatibility */
#define FC_RPORT_ROLE_UNKNOWN			FC_PORT_ROLE_UNKNOWN
#define FC_RPORT_ROLE_FCP_TARGET		FC_PORT_ROLE_FCP_TARGET
#define FC_RPORT_ROLE_FCP_INITIATOR		FC_PORT_ROLE_FCP_INITIATOR
#define FC_RPORT_ROLE_IP_PORT			FC_PORT_ROLE_IP_PORT


/* Macro for use in defining Virtual Port attributes */
#define FC_VPORT_ATTR(_name,_mode,_show,_store)		\
struct device_attribute dev_attr_vport_##_name = 	\
	__ATTR(_name,_mode,_show,_store)

/*
 * fc_vport_identifiers: This set of data contains all elements
 * to uniquely identify and instantiate a FC virtual port.
 *
 * Notes:
 *   symbolic_name: The driver is to append the symbolic_name string data
 *      to the symbolic_node_name data that it generates by default.
 *      the resulting combination should then be registered with the switch.
 *      It is expected that things like Xen may stuff a VM title into
 *      this field.
 */
#define FC_VPORT_SYMBOLIC_NAMELEN		64
struct fc_vport_identifiers {
	u64 node_name;
	u64 port_name;
	u32 roles;
	bool disable;
	enum fc_port_type vport_type;	/* only FC_PORTTYPE_NPIV allowed */
	char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
};

/*
 * FC Virtual Port Attributes
 *
 * This structure exists for each FC port is a virtual FC port. Virtual
 * ports share the physical link with the Physical port. Each virtual
 * ports has a unique presence on the SAN, and may be instantiated via
 * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a
 * unique presence, each vport has it's own view of the fabric,
 * authentication privilege, and priorities.
 *
 * A virtual port may support 1 or more FC4 roles. Typically it is a
 * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC
 * roles. FC port attributes for the vport will be reported on any
 * fc_host class object allocated for an FCP Initiator.
 *
 * --
 *
 * Fixed attributes are not expected to change. The driver is
 * expected to set these values after receiving the fc_vport structure
 * via the vport_create() call from the transport.
 * The transport fully manages all get functions w/o driver interaction.
 *
 * Dynamic attributes are expected to change. The driver participates
 * in all get/set operations via functions provided by the driver.
 *
 * Private attributes are transport-managed values. They are fully
 * managed by the transport w/o driver interaction.
 */

struct fc_vport {
	/* Fixed Attributes */

	/* Dynamic Attributes */

	/* Private (Transport-managed) Attributes */
	enum fc_vport_state vport_state;
	enum fc_vport_state vport_last_state;
	u64 node_name;
	u64 port_name;
	u32 roles;
	u32 vport_id;		/* Admin Identifier for the vport */
	enum fc_port_type vport_type;
	char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];

	/* exported data */
	void *dd_data;			/* Used for driver-specific storage */

	/* internal data */
	struct Scsi_Host *shost;	/* Physical Port Parent */
	unsigned int channel;
	u32 number;
	u8 flags;
	struct list_head peers;
	struct device dev;
	struct work_struct vport_delete_work;
} __attribute__((aligned(sizeof(unsigned long))));

/* bit field values for struct fc_vport "flags" field: */
#define FC_VPORT_CREATING		0x01
#define FC_VPORT_DELETING		0x02
#define FC_VPORT_DELETED		0x04
#define FC_VPORT_DEL			0x06	/* Any DELETE state */

#define	dev_to_vport(d)				\
	container_of(d, struct fc_vport, dev)
#define transport_class_to_vport(dev)		\
	dev_to_vport(dev->parent)
#define vport_to_shost(v)			\
	(v->shost)
#define vport_to_shost_channel(v)		\
	(v->channel)
#define vport_to_parent(v)			\
	(v->dev.parent)


/* Error return codes for vport_create() callback */
#define VPCERR_UNSUPPORTED		-ENOSYS		/* no driver/adapter
							   support */
#define VPCERR_BAD_WWN			-ENOTUNIQ	/* driver validation
							   of WWNs failed */
#define VPCERR_NO_FABRIC_SUPP		-EOPNOTSUPP	/* Fabric connection
							   is loop or the
							   Fabric Port does
							   not support NPIV */

/*
 * fc_rport_identifiers: This set of data contains all elements
 * to uniquely identify a remote FC port. The driver uses this data
 * to report the existence of a remote FC port in the topology. Internally,
 * the transport uses this data for attributes and to manage consistent
 * target id bindings.
 */
struct fc_rport_identifiers {
	u64 node_name;
	u64 port_name;
	u32 port_id;
	u32 roles;
};

/*
 * Fabric Performance Impact Notification Statistics
 */
struct fc_fpin_stats {
	/* Delivery */
	u64 dn;
	u64 dn_unknown;
	u64 dn_timeout;
	u64 dn_unable_to_route;
	u64 dn_device_specific;

	/* Link Integrity */
	u64 li;
	u64 li_failure_unknown;
	u64 li_link_failure_count;
	u64 li_loss_of_sync_count;
	u64 li_loss_of_signals_count;
	u64 li_prim_seq_err_count;
	u64 li_invalid_tx_word_count;
	u64 li_invalid_crc_count;
	u64 li_device_specific;

	/* Congestion/Peer Congestion */
	u64 cn;
	u64 cn_clear;
	u64 cn_lost_credit;
	u64 cn_credit_stall;
	u64 cn_oversubscription;
	u64 cn_device_specific;
};

/* Macro for use in defining Remote Port attributes */
#define FC_RPORT_ATTR(_name,_mode,_show,_store)				\
struct device_attribute dev_attr_rport_##_name = 	\
	__ATTR(_name,_mode,_show,_store)


/*
 * FC Remote Port Attributes
 *
 * This structure exists for each remote FC port that a LLDD notifies
 * the subsystem of.  A remote FC port may or may not be a SCSI Target,
 * also be a SCSI initiator, IP endpoint, etc. As such, the remote
 * port is considered a separate entity, independent of "role" (such
 * as scsi target).
 *
 * --
 *
 * Attributes are based on HBAAPI V2.0 definitions. Only those
 * attributes that are determinable by the local port (aka Host)
 * are contained.
 *
 * Fixed attributes are not expected to change. The driver is
 * expected to set these values after successfully calling
 * fc_remote_port_add(). The transport fully manages all get functions
 * w/o driver interaction.
 *
 * Dynamic attributes are expected to change. The driver participates
 * in all get/set operations via functions provided by the driver.
 *
 * Private attributes are transport-managed values. They are fully
 * managed by the transport w/o driver interaction.
 */

struct fc_rport {	/* aka fc_starget_attrs */
	/* Fixed Attributes */
	u32 maxframe_size;
	u32 supported_classes;

	/* Dynamic Attributes */
	u32 dev_loss_tmo;	/* Remote Port loss timeout in seconds. */
	struct fc_fpin_stats fpin_stats;

	/* Private (Transport-managed) Attributes */
	u64 node_name;
	u64 port_name;
	u32 port_id;
	u32 roles;
	enum fc_port_state port_state;	/* Will only be ONLINE or UNKNOWN */
	u32 scsi_target_id;
	u32 fast_io_fail_tmo;

	/* exported data */
	void *dd_data;			/* Used for driver-specific storage */

	/* internal data */
	unsigned int channel;
	u32 number;
	u8 flags;
	struct list_head peers;
	struct device dev;
 	struct delayed_work dev_loss_work;
 	struct work_struct scan_work;
 	struct delayed_work fail_io_work;
 	struct work_struct stgt_delete_work;
	struct work_struct rport_delete_work;
	struct request_queue *rqst_q;	/* bsg support */
} __attribute__((aligned(sizeof(unsigned long))));

/* bit field values for struct fc_rport "flags" field: */
#define FC_RPORT_DEVLOSS_PENDING	0x01
#define FC_RPORT_SCAN_PENDING		0x02
#define FC_RPORT_FAST_FAIL_TIMEDOUT	0x04
#define FC_RPORT_DEVLOSS_CALLBK_DONE	0x08

#define	dev_to_rport(d)				\
	container_of(d, struct fc_rport, dev)
#define transport_class_to_rport(dev)	\
	dev_to_rport(dev->parent)
#define rport_to_shost(r)			\
	dev_to_shost(r->dev.parent)

/*
 * FC SCSI Target Attributes
 *
 * The SCSI Target is considered an extension of a remote port (as
 * a remote port can be more than a SCSI Target). Within the scsi
 * subsystem, we leave the Target as a separate entity. Doing so
 * provides backward compatibility with prior FC transport api's,
 * and lets remote ports be handled entirely within the FC transport
 * and independently from the scsi subsystem. The drawback is that
 * some data will be duplicated.
 */

struct fc_starget_attrs {	/* aka fc_target_attrs */
	/* Dynamic Attributes */
	u64 node_name;
	u64 port_name;
	u32 port_id;
};

#define fc_starget_node_name(x) \
	(((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
#define fc_starget_port_name(x)	\
	(((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
#define fc_starget_port_id(x) \
	(((struct fc_starget_attrs *)&(x)->starget_data)->port_id)

#define starget_to_rport(s)			\
	scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL


/*
 * FC Local Port (Host) Statistics
 */

/* FC Statistics - Following FC HBAAPI v2.0 guidelines */
struct fc_host_statistics {
	/* port statistics */
	u64 seconds_since_last_reset;
	u64 tx_frames;
	u64 tx_words;
	u64 rx_frames;
	u64 rx_words;
	u64 lip_count;
	u64 nos_count;
	u64 error_frames;
	u64 dumped_frames;
	u64 link_failure_count;
	u64 loss_of_sync_count;
	u64 loss_of_signal_count;
	u64 prim_seq_protocol_err_count;
	u64 invalid_tx_word_count;
	u64 invalid_crc_count;

	/* fc4 statistics  (only FCP supported currently) */
	u64 fcp_input_requests;
	u64 fcp_output_requests;
	u64 fcp_control_requests;
	u64 fcp_input_megabytes;
	u64 fcp_output_megabytes;
	u64 fcp_packet_alloc_failures;	/* fcp packet allocation failures */
	u64 fcp_packet_aborts;		/* fcp packet aborted */
	u64 fcp_frame_alloc_failures;	/* fcp frame allocation failures */

	/* fc exches statistics */
	u64 fc_no_free_exch;		/* no free exch memory */
	u64 fc_no_free_exch_xid;	/* no free exch id */
	u64 fc_xid_not_found;		/* exch not found for a response */
	u64 fc_xid_busy;		/* exch exist for new a request */
	u64 fc_seq_not_found;		/* seq is not found for exchange */
	u64 fc_non_bls_resp;		/* a non BLS response frame with
					   a sequence responder in new exch */
	/* Host Congestion Signals */
	u64 cn_sig_warn;
	u64 cn_sig_alarm;
};


/*
 * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
 */

/*
 * fc_host_event_code: If you alter this, you also need to alter
 * scsi_transport_fc.c (for the ascii descriptions).
 */
enum fc_host_event_code  {
	FCH_EVT_LIP			= 0x1,
	FCH_EVT_LINKUP			= 0x2,
	FCH_EVT_LINKDOWN		= 0x3,
	FCH_EVT_LIPRESET		= 0x4,
	FCH_EVT_RSCN			= 0x5,
	FCH_EVT_ADAPTER_CHANGE		= 0x103,
	FCH_EVT_PORT_UNKNOWN		= 0x200,
	FCH_EVT_PORT_OFFLINE		= 0x201,
	FCH_EVT_PORT_ONLINE		= 0x202,
	FCH_EVT_PORT_FABRIC		= 0x204,
	FCH_EVT_LINK_UNKNOWN		= 0x500,
	FCH_EVT_LINK_FPIN		= 0x501,
	FCH_EVT_VENDOR_UNIQUE		= 0xffff,
};


/*
 * FC Local Port (Host) Attributes
 *
 * Attributes are based on HBAAPI V2.0 definitions.
 * Note: OSDeviceName is determined by user-space library
 *
 * Fixed attributes are not expected to change. The driver is
 * expected to set these values after successfully calling scsi_add_host().
 * The transport fully manages all get functions w/o driver interaction.
 *
 * Dynamic attributes are expected to change. The driver participates
 * in all get/set operations via functions provided by the driver.
 *
 * Private attributes are transport-managed values. They are fully
 * managed by the transport w/o driver interaction.
 */

#define FC_VENDOR_IDENTIFIER		8
#define FC_FC4_LIST_SIZE		32
#define FC_SYMBOLIC_NAME_SIZE		256
#define FC_VERSION_STRING_SIZE		64
#define FC_SERIAL_NUMBER_SIZE		64

struct fc_host_attrs {
	/* Fixed Attributes */
	u64 node_name;
	u64 port_name;
	u64 permanent_port_name;
	u32 supported_classes;
	u8  supported_fc4s[FC_FC4_LIST_SIZE];
	u32 supported_speeds;
	u32 maxframe_size;
	u16 max_npiv_vports;
	u32 max_ct_payload;
	u32 num_ports;
	u32 num_discovered_ports;
	u32 bootbios_state;
	char serial_number[FC_SERIAL_NUMBER_SIZE];
	char manufacturer[FC_SERIAL_NUMBER_SIZE];
	char model[FC_SYMBOLIC_NAME_SIZE];
	char model_description[FC_SYMBOLIC_NAME_SIZE];
	char hardware_version[FC_VERSION_STRING_SIZE];
	char driver_version[FC_VERSION_STRING_SIZE];
	char firmware_version[FC_VERSION_STRING_SIZE];
	char optionrom_version[FC_VERSION_STRING_SIZE];
	char vendor_identifier[FC_VENDOR_IDENTIFIER];
	char bootbios_version[FC_SYMBOLIC_NAME_SIZE];


	/* Dynamic Attributes */
	u32 port_id;
	enum fc_port_type port_type;
	enum fc_port_state port_state;
	u8  active_fc4s[FC_FC4_LIST_SIZE];
	u32 speed;
	u64 fabric_name;
	char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
	char system_hostname[FC_SYMBOLIC_NAME_SIZE];
	u32 dev_loss_tmo;
	struct fc_fpin_stats fpin_stats;

	/* Private (Transport-managed) Attributes */
	enum fc_tgtid_binding_type  tgtid_bind_type;

	/* internal data */
	struct list_head rports;
	struct list_head rport_bindings;
	struct list_head vports;
	u32 next_rport_number;
	u32 next_target_id;
	u32 next_vport_number;
	u16 npiv_vports_inuse;

	/* work queues for rport state manipulation */
	char work_q_name[20];
	struct workqueue_struct *work_q;
	char devloss_work_q_name[20];
	struct workqueue_struct *devloss_work_q;

	/* bsg support */
	struct request_queue *rqst_q;

	/* FDMI support version*/
	u8 fdmi_version;
};

#define shost_to_fc_host(x) \
	((struct fc_host_attrs *)(x)->shost_data)

#define fc_host_node_name(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->node_name)
#define fc_host_port_name(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->port_name)
#define fc_host_permanent_port_name(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
#define fc_host_supported_classes(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
#define fc_host_supported_fc4s(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
#define fc_host_supported_speeds(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
#define fc_host_maxframe_size(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
#define fc_host_max_npiv_vports(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
#define fc_host_serial_number(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->serial_number)
#define fc_host_manufacturer(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->manufacturer)
#define fc_host_model(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->model)
#define fc_host_model_description(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->model_description)
#define fc_host_hardware_version(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->hardware_version)
#define fc_host_driver_version(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->driver_version)
#define fc_host_firmware_version(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->firmware_version)
#define fc_host_optionrom_version(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->optionrom_version)
#define fc_host_port_id(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->port_id)
#define fc_host_port_type(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->port_type)
#define fc_host_port_state(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->port_state)
#define fc_host_active_fc4s(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
#define fc_host_speed(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->speed)
#define fc_host_fabric_name(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
#define fc_host_symbolic_name(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
#define fc_host_system_hostname(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
#define fc_host_tgtid_bind_type(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
#define fc_host_rports(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->rports)
#define fc_host_rport_bindings(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
#define fc_host_vports(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->vports)
#define fc_host_next_rport_number(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
#define fc_host_next_target_id(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
#define fc_host_next_vport_number(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
#define fc_host_npiv_vports_inuse(x)	\
	(((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
#define fc_host_work_q_name(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
#define fc_host_work_q(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->work_q)
#define fc_host_devloss_work_q_name(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
#define fc_host_devloss_work_q(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
#define fc_host_dev_loss_tmo(x) \
	(((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
#define fc_host_max_ct_payload(x)  \
	(((struct fc_host_attrs *)(x)->shost_data)->max_ct_payload)
#define fc_host_vendor_identifier(x)  \
	(((struct fc_host_attrs *)(x)->shost_data)->vendor_identifier)
#define fc_host_num_discovered_ports(x)  \
	(((struct fc_host_attrs *)(x)->shost_data)->num_discovered_ports)
#define fc_host_num_ports(x)  \
	(((struct fc_host_attrs *)(x)->shost_data)->num_ports)
#define fc_host_bootbios_version(x)  \
	(((struct fc_host_attrs *)(x)->shost_data)->bootbios_version)
#define fc_host_bootbios_state(x)  \
	(((struct fc_host_attrs *)(x)->shost_data)->bootbios_state)

/* The functions by which the transport class and the driver communicate */
struct fc_function_template {
	void    (*get_rport_dev_loss_tmo)(struct fc_rport *);
	void	(*set_rport_dev_loss_tmo)(struct fc_rport *, u32);

	void	(*get_starget_node_name)(struct scsi_target *);
	void	(*get_starget_port_name)(struct scsi_target *);
	void 	(*get_starget_port_id)(struct scsi_target *);

	void 	(*get_host_port_id)(struct Scsi_Host *);
	void	(*get_host_port_type)(struct Scsi_Host *);
	void	(*get_host_port_state)(struct Scsi_Host *);
	void	(*get_host_active_fc4s)(struct Scsi_Host *);
	void	(*get_host_speed)(struct Scsi_Host *);
	void	(*get_host_fabric_name)(struct Scsi_Host *);
	void	(*get_host_symbolic_name)(struct Scsi_Host *);
	void	(*set_host_system_hostname)(struct Scsi_Host *);

	struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
	void	(*reset_fc_host_stats)(struct Scsi_Host *);

	int	(*issue_fc_host_lip)(struct Scsi_Host *);

	void    (*dev_loss_tmo_callbk)(struct fc_rport *);
	void	(*terminate_rport_io)(struct fc_rport *);

	void	(*set_vport_symbolic_name)(struct fc_vport *);
	int  	(*vport_create)(struct fc_vport *, bool);
	int	(*vport_disable)(struct fc_vport *, bool);
	int  	(*vport_delete)(struct fc_vport *);

	/* bsg support */
	int	(*bsg_request)(struct bsg_job *);
	int	(*bsg_timeout)(struct bsg_job *);

	/* allocation lengths for host-specific data */
	u32	 			dd_fcrport_size;
	u32	 			dd_fcvport_size;
	u32				dd_bsg_size;

	/*
	 * The driver sets these to tell the transport class it
	 * wants the attributes displayed in sysfs.  If the show_ flag
	 * is not set, the attribute will be private to the transport
	 * class
	 */

	/* remote port fixed attributes */
	unsigned long	show_rport_maxframe_size:1;
	unsigned long	show_rport_supported_classes:1;
	unsigned long   show_rport_dev_loss_tmo:1;

	/*
	 * target dynamic attributes
	 * These should all be "1" if the driver uses the remote port
	 * add/delete functions (so attributes reflect rport values).
	 */
	unsigned long	show_starget_node_name:1;
	unsigned long	show_starget_port_name:1;
	unsigned long	show_starget_port_id:1;

	/* host fixed attributes */
	unsigned long	show_host_node_name:1;
	unsigned long	show_host_port_name:1;
	unsigned long	show_host_permanent_port_name:1;
	unsigned long	show_host_supported_classes:1;
	unsigned long	show_host_supported_fc4s:1;
	unsigned long	show_host_supported_speeds:1;
	unsigned long	show_host_maxframe_size:1;
	unsigned long	show_host_serial_number:1;
	unsigned long	show_host_manufacturer:1;
	unsigned long	show_host_model:1;
	unsigned long	show_host_model_description:1;
	unsigned long	show_host_hardware_version:1;
	unsigned long	show_host_driver_version:1;
	unsigned long	show_host_firmware_version:1;
	unsigned long	show_host_optionrom_version:1;
	/* host dynamic attributes */
	unsigned long	show_host_port_id:1;
	unsigned long	show_host_port_type:1;
	unsigned long	show_host_port_state:1;
	unsigned long	show_host_active_fc4s:1;
	unsigned long	show_host_speed:1;
	unsigned long	show_host_fabric_name:1;
	unsigned long	show_host_symbolic_name:1;
	unsigned long	show_host_system_hostname:1;

	unsigned long	disable_target_scan:1;
};

/**
 * fc_remote_port_chkready - called to validate the remote port state
 *   prior to initiating io to the port.
 *
 * Returns a scsi result code that can be returned by the LLDD.
 *
 * @rport:	remote port to be checked
 **/
static inline int
fc_remote_port_chkready(struct fc_rport *rport)
{
	int result;

	switch (rport->port_state) {
	case FC_PORTSTATE_ONLINE:
	case FC_PORTSTATE_MARGINAL:
		if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
			result = 0;
		else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
			result = DID_IMM_RETRY << 16;
		else
			result = DID_NO_CONNECT << 16;
		break;
	case FC_PORTSTATE_BLOCKED:
		if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
			result = DID_TRANSPORT_FAILFAST << 16;
		else
			result = DID_IMM_RETRY << 16;
		break;
	default:
		result = DID_NO_CONNECT << 16;
		break;
	}
	return result;
}

static inline u64 wwn_to_u64(const u8 *wwn)
{
	return get_unaligned_be64(wwn);
}

static inline void u64_to_wwn(u64 inm, u8 *wwn)
{
	put_unaligned_be64(inm, wwn);
}

/**
 * fc_vport_set_state() - called to set a vport's state. Saves the old state,
 *   excepting the transitory states of initializing and sending the ELS
 *   traffic to instantiate the vport on the link.
 *
 * Assumes the driver has surrounded this with the proper locking to ensure
 * a coherent state change.
 *
 * @vport:	virtual port whose state is changing
 * @new_state:  new state
 **/
static inline void
fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
{
	if ((new_state != FC_VPORT_UNKNOWN) &&
	    (new_state != FC_VPORT_INITIALIZING))
		vport->vport_last_state = vport->vport_state;
	vport->vport_state = new_state;
}

struct scsi_transport_template *fc_attach_transport(
			struct fc_function_template *);
void fc_release_transport(struct scsi_transport_template *);
void fc_remove_host(struct Scsi_Host *);
struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
			int channel, struct fc_rport_identifiers  *ids);
void fc_remote_port_delete(struct fc_rport  *rport);
void fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles);
int scsi_is_fc_rport(const struct device *);
u32 fc_get_event_number(void);
void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
		enum fc_host_event_code event_code, u32 event_data);
void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
		u32 data_len, char *data_buf, u64 vendor_id);
struct fc_rport *fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn);
void fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
		enum fc_host_event_code event_code,
		u32 data_len, char *data_buf, u64 vendor_id);
	/* Note: when specifying vendor_id to fc_host_post_vendor_event()
	 *   or fc_host_post_fc_event(), be sure to read the Vendor Type
	 *   and ID formatting requirements specified in scsi_netlink.h
	 * Note: when calling fc_host_post_fc_event(), vendor_id may be
	 *   specified as 0.
	 */
void fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf);
struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
		struct fc_vport_identifiers *);
int fc_vport_terminate(struct fc_vport *vport);
int fc_block_rport(struct fc_rport *rport);
int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd);
bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd);

static inline struct Scsi_Host *fc_bsg_to_shost(struct bsg_job *job)
{
	if (scsi_is_host_device(job->dev))
		return dev_to_shost(job->dev);
	return rport_to_shost(dev_to_rport(job->dev));
}

static inline struct fc_rport *fc_bsg_to_rport(struct bsg_job *job)
{
	if (scsi_is_fc_rport(job->dev))
		return dev_to_rport(job->dev);
	return NULL;
}

#endif /* SCSI_TRANSPORT_FC_H */