summaryrefslogtreecommitdiffstats
path: root/kernel/include/uapi/scsi/fc/fc_els.h
blob: 481abbd48e394c096960d3c1f4a894c175e7caba (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
/*
 * Copyright(c) 2007 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Maintained at www.Open-FCoE.org
 */

#ifndef _FC_ELS_H_
#define	_FC_ELS_H_

#include <linux/types.h>

/*
 * Fibre Channel Switch - Enhanced Link Services definitions.
 * From T11 FC-LS Rev 1.2 June 7, 2005.
 */

/*
 * ELS Command codes - byte 0 of the frame payload
 */
enum fc_els_cmd {
	ELS_LS_RJT =	0x01,	/* ESL reject */
	ELS_LS_ACC =	0x02,	/* ESL Accept */
	ELS_PLOGI =	0x03,	/* N_Port login */
	ELS_FLOGI =	0x04,	/* F_Port login */
	ELS_LOGO =	0x05,	/* Logout */
	ELS_ABTX =	0x06,	/* Abort exchange - obsolete */
	ELS_RCS =	0x07,	/* read connection status */
	ELS_RES =	0x08,	/* read exchange status block */
	ELS_RSS =	0x09,	/* read sequence status block */
	ELS_RSI =	0x0a,	/* read sequence initiative */
	ELS_ESTS =	0x0b,	/* establish streaming */
	ELS_ESTC =	0x0c,	/* estimate credit */
	ELS_ADVC =	0x0d,	/* advise credit */
	ELS_RTV =	0x0e,	/* read timeout value */
	ELS_RLS =	0x0f,	/* read link error status block */
	ELS_ECHO =	0x10,	/* echo */
	ELS_TEST =	0x11,	/* test */
	ELS_RRQ =	0x12,	/* reinstate recovery qualifier */
	ELS_REC =	0x13,	/* read exchange concise */
	ELS_SRR =	0x14,	/* sequence retransmission request */
	ELS_PRLI =	0x20,	/* process login */
	ELS_PRLO =	0x21,	/* process logout */
	ELS_SCN =	0x22,	/* state change notification */
	ELS_TPLS =	0x23,	/* test process login state */
	ELS_TPRLO =	0x24,	/* third party process logout */
	ELS_LCLM =	0x25,	/* login control list mgmt (obs) */
	ELS_GAID =	0x30,	/* get alias_ID */
	ELS_FACT =	0x31,	/* fabric activate alias_id */
	ELS_FDACDT =	0x32,	/* fabric deactivate alias_id */
	ELS_NACT =	0x33,	/* N-port activate alias_id */
	ELS_NDACT =	0x34,	/* N-port deactivate alias_id */
	ELS_QOSR =	0x40,	/* quality of service request */
	ELS_RVCS =	0x41,	/* read virtual circuit status */
	ELS_PDISC =	0x50,	/* discover N_port service params */
	ELS_FDISC =	0x51,	/* discover F_port service params */
	ELS_ADISC =	0x52,	/* discover address */
	ELS_RNC =	0x53,	/* report node cap (obs) */
	ELS_FARP_REQ =	0x54,	/* FC ARP request */
	ELS_FARP_REPL =	0x55,	/* FC ARP reply */
	ELS_RPS =	0x56,	/* read port status block */
	ELS_RPL =	0x57,	/* read port list */
	ELS_RPBC =	0x58,	/* read port buffer condition */
	ELS_FAN =	0x60,	/* fabric address notification */
	ELS_RSCN =	0x61,	/* registered state change notification */
	ELS_SCR =	0x62,	/* state change registration */
	ELS_RNFT =	0x63,	/* report node FC-4 types */
	ELS_CSR =	0x68,	/* clock synch. request */
	ELS_CSU =	0x69,	/* clock synch. update */
	ELS_LINIT =	0x70,	/* loop initialize */
	ELS_LSTS =	0x72,	/* loop status */
	ELS_RNID =	0x78,	/* request node ID data */
	ELS_RLIR =	0x79,	/* registered link incident report */
	ELS_LIRR =	0x7a,	/* link incident record registration */
	ELS_SRL =	0x7b,	/* scan remote loop */
	ELS_SBRP =	0x7c,	/* set bit-error reporting params */
	ELS_RPSC =	0x7d,	/* report speed capabilities */
	ELS_QSA =	0x7e,	/* query security attributes */
	ELS_EVFP =	0x7f,	/* exchange virt. fabrics params */
	ELS_LKA =	0x80,	/* link keep-alive */
	ELS_AUTH_ELS =	0x90,	/* authentication ELS */
};

/*
 * Initializer useful for decoding table.
 * Please keep this in sync with the above definitions.
 */
#define	FC_ELS_CMDS_INIT {			\
	[ELS_LS_RJT] =	"LS_RJT",		\
	[ELS_LS_ACC] =	"LS_ACC",		\
	[ELS_PLOGI] =	"PLOGI",		\
	[ELS_FLOGI] =	"FLOGI",		\
	[ELS_LOGO] =	"LOGO",			\
	[ELS_ABTX] =	"ABTX",			\
	[ELS_RCS] =	"RCS",			\
	[ELS_RES] =	"RES",			\
	[ELS_RSS] =	"RSS",			\
	[ELS_RSI] =	"RSI",			\
	[ELS_ESTS] =	"ESTS",			\
	[ELS_ESTC] =	"ESTC",			\
	[ELS_ADVC] =	"ADVC",			\
	[ELS_RTV] =	"RTV",			\
	[ELS_RLS] =	"RLS",			\
	[ELS_ECHO] =	"ECHO",			\
	[ELS_TEST] =	"TEST",			\
	[ELS_RRQ] =	"RRQ",			\
	[ELS_REC] =	"REC",			\
	[ELS_SRR] =	"SRR",			\
	[ELS_PRLI] =	"PRLI",			\
	[ELS_PRLO] =	"PRLO",			\
	[ELS_SCN] =	"SCN",			\
	[ELS_TPLS] =	"TPLS",			\
	[ELS_TPRLO] =	"TPRLO",		\
	[ELS_LCLM] =	"LCLM",			\
	[ELS_GAID] =	"GAID",			\
	[ELS_FACT] =	"FACT",			\
	[ELS_FDACDT] =	"FDACDT",		\
	[ELS_NACT] =	"NACT",			\
	[ELS_NDACT] =	"NDACT",		\
	[ELS_QOSR] =	"QOSR",			\
	[ELS_RVCS] =	"RVCS",			\
	[ELS_PDISC] =	"PDISC",		\
	[ELS_FDISC] =	"FDISC",		\
	[ELS_ADISC] =	"ADISC",		\
	[ELS_RNC] =	"RNC",			\
	[ELS_FARP_REQ] = "FARP_REQ",		\
	[ELS_FARP_REPL] =  "FARP_REPL",		\
	[ELS_RPS] =	"RPS",			\
	[ELS_RPL] =	"RPL",			\
	[ELS_RPBC] =	"RPBC",			\
	[ELS_FAN] =	"FAN",			\
	[ELS_RSCN] =	"RSCN",			\
	[ELS_SCR] =	"SCR",			\
	[ELS_RNFT] =	"RNFT",			\
	[ELS_CSR] =	"CSR",			\
	[ELS_CSU] =	"CSU",			\
	[ELS_LINIT] =	"LINIT",		\
	[ELS_LSTS] =	"LSTS",			\
	[ELS_RNID] =	"RNID",			\
	[ELS_RLIR] =	"RLIR",			\
	[ELS_LIRR] =	"LIRR",			\
	[ELS_SRL] =	"SRL",			\
	[ELS_SBRP] =	"SBRP",			\
	[ELS_RPSC] =	"RPSC",			\
	[ELS_QSA] =	"QSA",			\
	[ELS_EVFP] =	"EVFP",			\
	[ELS_LKA] =	"LKA",			\
	[ELS_AUTH_ELS] = "AUTH_ELS",		\
}

/*
 * LS_ACC payload.
 */
struct fc_els_ls_acc {
	__u8          la_cmd;		/* command code ELS_LS_ACC */
	__u8          la_resv[3];	/* reserved */
};

/*
 * ELS reject payload.
 */
struct fc_els_ls_rjt {
	__u8	er_cmd;		/* command code ELS_LS_RJT */
	__u8	er_resv[4];	/* reserved must be zero */
	__u8	er_reason;	/* reason (enum fc_els_rjt_reason below) */
	__u8	er_explan;	/* explanation (enum fc_els_rjt_explan below) */
	__u8	er_vendor;	/* vendor specific code */
};

/*
 * ELS reject reason codes (er_reason).
 */
enum fc_els_rjt_reason {
	ELS_RJT_NONE =		0,	/* no reject - not to be sent */
	ELS_RJT_INVAL =		0x01,	/* invalid ELS command code */
	ELS_RJT_LOGIC =		0x03,	/* logical error */
	ELS_RJT_BUSY =		0x05,	/* logical busy */
	ELS_RJT_PROT =		0x07,	/* protocol error */
	ELS_RJT_UNAB =		0x09,	/* unable to perform command request */
	ELS_RJT_UNSUP =		0x0b,	/* command not supported */
	ELS_RJT_INPROG =	0x0e,	/* command already in progress */
	ELS_RJT_FIP =		0x20,	/* FIP error */
	ELS_RJT_VENDOR =	0xff,	/* vendor specific error */
};


/*
 * reason code explanation (er_explan).
 */
enum fc_els_rjt_explan {
	ELS_EXPL_NONE =		0x00,	/* No additional explanation */
	ELS_EXPL_SPP_OPT_ERR =	0x01,	/* service parameter error - options */
	ELS_EXPL_SPP_ICTL_ERR =	0x03,	/* service parm error - initiator ctl */
	ELS_EXPL_AH =		0x11,	/* invalid association header */
	ELS_EXPL_AH_REQ =	0x13,	/* association_header required */
	ELS_EXPL_SID =		0x15,	/* invalid originator S_ID */
	ELS_EXPL_OXID_RXID =	0x17,	/* invalid OX_ID-RX_ID combination */
	ELS_EXPL_INPROG =	0x19,	/* Request already in progress */
	ELS_EXPL_PLOGI_REQD =	0x1e,	/* N_Port login required */
	ELS_EXPL_INSUF_RES =	0x29,	/* insufficient resources */
	ELS_EXPL_UNAB_DATA =	0x2a,	/* unable to supply requested data */
	ELS_EXPL_UNSUPR =	0x2c,	/* Request not supported */
	ELS_EXPL_INV_LEN =	0x2d,	/* Invalid payload length */
	ELS_EXPL_NOT_NEIGHBOR = 0x62,	/* VN2VN_Port not in neighbor set */
	/* TBD - above definitions incomplete */
};

/*
 * Common service parameters (N ports).
 */
struct fc_els_csp {
	__u8		sp_hi_ver;	/* highest version supported (obs.) */
	__u8		sp_lo_ver;	/* highest version supported (obs.) */
	__be16		sp_bb_cred;	/* buffer-to-buffer credits */
	__be16		sp_features;	/* common feature flags */
	__be16		sp_bb_data;	/* b-b state number and data field sz */
	union {
		struct {
			__be16	_sp_tot_seq; /* total concurrent sequences */
			__be16	_sp_rel_off; /* rel. offset by info cat */
		} sp_plogi;
		struct {
			__be32	_sp_r_a_tov; /* resource alloc. timeout msec */
		} sp_flogi_acc;
	} sp_u;
	__be32		sp_e_d_tov;	/* error detect timeout value */
};
#define	sp_tot_seq	sp_u.sp_plogi._sp_tot_seq
#define	sp_rel_off	sp_u.sp_plogi._sp_rel_off
#define	sp_r_a_tov	sp_u.sp_flogi_acc._sp_r_a_tov

#define	FC_SP_BB_DATA_MASK 0xfff /* mask for data field size in sp_bb_data */

/*
 * Minimum and maximum values for max data field size in service parameters.
 */
#define	FC_SP_MIN_MAX_PAYLOAD	FC_MIN_MAX_PAYLOAD
#define	FC_SP_MAX_MAX_PAYLOAD	FC_MAX_PAYLOAD

/*
 * sp_features
 */
#define	FC_SP_FT_NPIV	0x8000	/* multiple N_Port_ID support (FLOGI) */
#define	FC_SP_FT_CIRO	0x8000	/* continuously increasing rel off (PLOGI) */
#define	FC_SP_FT_CLAD	0x8000	/* clean address (in FLOGI LS_ACC) */
#define	FC_SP_FT_RAND	0x4000	/* random relative offset */
#define	FC_SP_FT_VAL	0x2000	/* valid vendor version level */
#define	FC_SP_FT_NPIV_ACC	0x2000	/* NPIV assignment (FLOGI LS_ACC) */
#define	FC_SP_FT_FPORT	0x1000	/* F port (1) vs. N port (0) */
#define	FC_SP_FT_ABB	0x0800	/* alternate BB_credit management */
#define	FC_SP_FT_EDTR	0x0400	/* E_D_TOV Resolution is nanoseconds */
#define	FC_SP_FT_MCAST	0x0200	/* multicast */
#define	FC_SP_FT_BCAST	0x0100	/* broadcast */
#define	FC_SP_FT_HUNT	0x0080	/* hunt group */
#define	FC_SP_FT_SIMP	0x0040	/* dedicated simplex */
#define	FC_SP_FT_SEC	0x0020	/* reserved for security */
#define	FC_SP_FT_CSYN	0x0010	/* clock synch. supported */
#define	FC_SP_FT_RTTOV	0x0008	/* R_T_TOV value 100 uS, else 100 mS */
#define	FC_SP_FT_HALF	0x0004	/* dynamic half duplex */
#define	FC_SP_FT_SEQC	0x0002	/* SEQ_CNT */
#define	FC_SP_FT_PAYL	0x0001	/* FLOGI payload length 256, else 116 */

/*
 * Class-specific service parameters.
 */
struct fc_els_cssp {
	__be16		cp_class;	/* class flags */
	__be16		cp_init;	/* initiator flags */
	__be16		cp_recip;	/* recipient flags */
	__be16		cp_rdfs;	/* receive data field size */
	__be16		cp_con_seq;	/* concurrent sequences */
	__be16		cp_ee_cred;	/* N-port end-to-end credit */
	__u8		cp_resv1;	/* reserved */
	__u8		cp_open_seq;	/* open sequences per exchange */
	__u8		_cp_resv2[2];	/* reserved */
};

/*
 * cp_class flags.
 */
#define	FC_CPC_VALID	0x8000		/* class valid */
#define	FC_CPC_IMIX	0x4000		/* intermix mode */
#define	FC_CPC_SEQ	0x0800		/* sequential delivery */
#define	FC_CPC_CAMP	0x0200		/* camp-on */
#define	FC_CPC_PRI	0x0080		/* priority */

/*
 * cp_init flags.
 * (TBD: not all flags defined here).
 */
#define	FC_CPI_CSYN	0x0010		/* clock synch. capable */

/*
 * cp_recip flags.
 */
#define	FC_CPR_CSYN	0x0008		/* clock synch. capable */

/*
 * NFC_ELS_FLOGI: Fabric login request.
 * NFC_ELS_PLOGI: Port login request (same format).
 */
struct fc_els_flogi {
	__u8		fl_cmd;		/* command */
	__u8		_fl_resvd[3];	/* must be zero */
	struct fc_els_csp fl_csp;	/* common service parameters */
	__be64		fl_wwpn;	/* port name */
	__be64		fl_wwnn;	/* node name */
	struct fc_els_cssp fl_cssp[4];	/* class 1-4 service parameters */
	__u8		fl_vend[16];	/* vendor version level */
} __attribute__((__packed__));

/*
 * Process login service parameter page.
 */
struct fc_els_spp {
	__u8		spp_type;	/* type code or common service params */
	__u8		spp_type_ext;	/* type code extension */
	__u8		spp_flags;
	__u8		_spp_resvd;
	__be32		spp_orig_pa;	/* originator process associator */
	__be32		spp_resp_pa;	/* responder process associator */
	__be32		spp_params;	/* service parameters */
};

/*
 * spp_flags.
 */
#define	FC_SPP_OPA_VAL	    0x80	/* originator proc. assoc. valid */
#define	FC_SPP_RPA_VAL	    0x40	/* responder proc. assoc. valid */
#define	FC_SPP_EST_IMG_PAIR 0x20	/* establish image pair */
#define	FC_SPP_RESP_MASK    0x0f	/* mask for response code (below) */

/*
 * SPP response code in spp_flags - lower 4 bits.
 */
enum fc_els_spp_resp {
	FC_SPP_RESP_ACK	=	1,	/* request executed */
	FC_SPP_RESP_RES =	2,	/* unable due to lack of resources */
	FC_SPP_RESP_INIT =	3,	/* initialization not complete */
	FC_SPP_RESP_NO_PA = 	4,	/* unknown process associator */
	FC_SPP_RESP_CONF = 	5,	/* configuration precludes image pair */
	FC_SPP_RESP_COND = 	6,	/* request completed conditionally */
	FC_SPP_RESP_MULT = 	7,	/* unable to handle multiple SPPs */
	FC_SPP_RESP_INVL = 	8,	/* SPP is invalid */
};

/*
 * ELS_RRQ - Reinstate Recovery Qualifier
 */
struct fc_els_rrq {
	__u8		rrq_cmd;	/* command (0x12) */
	__u8		rrq_zero[3];	/* specified as zero - part of cmd */
	__u8		rrq_resvd;	/* reserved */
	__u8		rrq_s_id[3];	/* originator FID */
	__be16		rrq_ox_id;	/* originator exchange ID */
	__be16		rrq_rx_id;	/* responders exchange ID */
};

/*
 * ELS_REC - Read exchange concise.
 */
struct fc_els_rec {
	__u8		rec_cmd;	/* command (0x13) */
	__u8		rec_zero[3];	/* specified as zero - part of cmd */
	__u8		rec_resvd;	/* reserved */
	__u8		rec_s_id[3];	/* originator FID */
	__be16		rec_ox_id;	/* originator exchange ID */
	__be16		rec_rx_id;	/* responders exchange ID */
};

/*
 * ELS_REC LS_ACC payload.
 */
struct fc_els_rec_acc {
	__u8		reca_cmd;	/* accept (0x02) */
	__u8		reca_zero[3];	/* specified as zero - part of cmd */
	__be16		reca_ox_id;	/* originator exchange ID */
	__be16		reca_rx_id;	/* responders exchange ID */
	__u8		reca_resvd1;	/* reserved */
	__u8		reca_ofid[3];	/* originator FID */
	__u8		reca_resvd2;	/* reserved */
	__u8		reca_rfid[3];	/* responder FID */
	__be32		reca_fc4value;	/* FC4 value */
	__be32		reca_e_stat;	/* ESB (exchange status block) status */
};

/*
 * ELS_PRLI - Process login request and response.
 */
struct fc_els_prli {
	__u8		prli_cmd;	/* command */
	__u8		prli_spp_len;	/* length of each serv. parm. page */
	__be16		prli_len;	/* length of entire payload */
	/* service parameter pages follow */
};

/*
 * ELS_PRLO - Process logout request and response.
 */
struct fc_els_prlo {
	__u8            prlo_cmd;       /* command */
	__u8            prlo_obs;       /* obsolete, but shall be set to 10h */
	__be16          prlo_len;       /* payload length */
};

/*
 * ELS_ADISC payload
 */
struct fc_els_adisc {
	__u8		adisc_cmd;
	__u8		adisc_resv[3];
	__u8            adisc_resv1;
	__u8            adisc_hard_addr[3];
	__be64          adisc_wwpn;
	__be64          adisc_wwnn;
	__u8            adisc_resv2;
	__u8            adisc_port_id[3];
} __attribute__((__packed__));

/*
 * ELS_LOGO - process or fabric logout.
 */
struct fc_els_logo {
	__u8		fl_cmd;		/* command code */
	__u8		fl_zero[3];	/* specified as zero - part of cmd */
	__u8		fl_resvd;	/* reserved */
	__u8		fl_n_port_id[3];/* N port ID */
	__be64		fl_n_port_wwn;	/* port name */
};

/*
 * ELS_RTV - read timeout value.
 */
struct fc_els_rtv {
	__u8		rtv_cmd;	/* command code 0x0e */
	__u8		rtv_zero[3];	/* specified as zero - part of cmd */
};

/*
 * LS_ACC for ELS_RTV - read timeout value.
 */
struct fc_els_rtv_acc {
	__u8		rtv_cmd;	/* command code 0x02 */
	__u8		rtv_zero[3];	/* specified as zero - part of cmd */
	__be32		rtv_r_a_tov;	/* resource allocation timeout value */
	__be32		rtv_e_d_tov;	/* error detection timeout value */
	__be32		rtv_toq;	/* timeout qualifier (see below) */
};

/*
 * rtv_toq bits.
 */
#define	FC_ELS_RTV_EDRES (1 << 26)	/* E_D_TOV resolution is nS else mS */
#define	FC_ELS_RTV_RTTOV (1 << 19)	/* R_T_TOV is 100 uS else 100 mS */

/*
 * ELS_SCR - state change registration payload.
 */
struct fc_els_scr {
	__u8		scr_cmd;	/* command code */
	__u8		scr_resv[6];	/* reserved */
	__u8		scr_reg_func;	/* registration function (see below) */
};

enum fc_els_scr_func {
	ELS_SCRF_FAB =	1,	/* fabric-detected registration */
	ELS_SCRF_NPORT = 2,	/* Nx_Port-detected registration */
	ELS_SCRF_FULL =	3,	/* full registration */
	ELS_SCRF_CLEAR = 255,	/* remove any current registrations */
};

/*
 * ELS_RSCN - registered state change notification payload.
 */
struct fc_els_rscn {
	__u8		rscn_cmd;	/* RSCN opcode (0x61) */
	__u8		rscn_page_len;	/* page length (4) */
	__be16		rscn_plen;	/* payload length including this word */

	/* followed by 4-byte generic affected Port_ID pages */
};

struct fc_els_rscn_page {
	__u8		rscn_page_flags; /* event and address format */
	__u8		rscn_fid[3];	/* fabric ID */
};

#define	ELS_RSCN_EV_QUAL_BIT	2	/* shift count for event qualifier */
#define	ELS_RSCN_EV_QUAL_MASK	0xf	/* mask for event qualifier */
#define	ELS_RSCN_ADDR_FMT_BIT	0	/* shift count for address format */
#define	ELS_RSCN_ADDR_FMT_MASK	0x3	/* mask for address format */

enum fc_els_rscn_ev_qual {
	ELS_EV_QUAL_NONE = 0,		/* unspecified */
	ELS_EV_QUAL_NS_OBJ = 1,		/* changed name server object */
	ELS_EV_QUAL_PORT_ATTR = 2,	/* changed port attribute */
	ELS_EV_QUAL_SERV_OBJ = 3,	/* changed service object */
	ELS_EV_QUAL_SW_CONFIG = 4,	/* changed switch configuration */
	ELS_EV_QUAL_REM_OBJ = 5,	/* removed object */
};

enum fc_els_rscn_addr_fmt {
	ELS_ADDR_FMT_PORT = 0,	/* rscn_fid is a port address */
	ELS_ADDR_FMT_AREA = 1,	/* rscn_fid is a area address */
	ELS_ADDR_FMT_DOM = 2,	/* rscn_fid is a domain address */
	ELS_ADDR_FMT_FAB = 3,	/* anything on fabric may have changed */
};

/*
 * ELS_RNID - request Node ID.
 */
struct fc_els_rnid {
	__u8		rnid_cmd;	/* RNID opcode (0x78) */
	__u8		rnid_resv[3];	/* reserved */
	__u8		rnid_fmt;	/* data format */
	__u8		rnid_resv2[3];	/* reserved */
};

/*
 * Node Identification Data formats (rnid_fmt)
 */
enum fc_els_rnid_fmt {
	ELS_RNIDF_NONE = 0,		/* no specific identification data */
	ELS_RNIDF_GEN = 0xdf,		/* general topology discovery format */
};

/*
 * ELS_RNID response.
 */
struct fc_els_rnid_resp {
	__u8		rnid_cmd;	/* response code (LS_ACC) */
	__u8		rnid_resv[3];	/* reserved */
	__u8		rnid_fmt;	/* data format */
	__u8		rnid_cid_len;	/* common ID data length */
	__u8		rnid_resv2;	/* reserved */
	__u8		rnid_sid_len;	/* specific ID data length */
};

struct fc_els_rnid_cid {
	__be64		rnid_wwpn;	/* N port name */
	__be64		rnid_wwnn;	/* node name */
};

struct fc_els_rnid_gen {
	__u8		rnid_vend_id[16]; /* vendor-unique ID */
	__be32		rnid_atype;	/* associated type (see below) */
	__be32		rnid_phys_port;	/* physical port number */
	__be32		rnid_att_nodes;	/* number of attached nodes */
	__u8		rnid_node_mgmt;	/* node management (see below) */
	__u8		rnid_ip_ver;	/* IP version (see below) */
	__be16		rnid_prot_port;	/* UDP / TCP port number */
	__be32		rnid_ip_addr[4]; /* IP address */
	__u8		rnid_resvd[2];	/* reserved */
	__be16		rnid_vend_spec;	/* vendor-specific field */
};

enum fc_els_rnid_atype {
	ELS_RNIDA_UNK =		0x01,	/* unknown */
	ELS_RNIDA_OTHER =	0x02,	/* none of the following */
	ELS_RNIDA_HUB =		0x03,
	ELS_RNIDA_SWITCH =	0x04,
	ELS_RNIDA_GATEWAY =	0x05,
	ELS_RNIDA_CONV =	0x06,   /* Obsolete, do not use this value */
	ELS_RNIDA_HBA =	        0x07,   /* Obsolete, do not use this value */
	ELS_RNIDA_PROXY =       0x08,   /* Obsolete, do not use this value */
	ELS_RNIDA_STORAGE =	0x09,
	ELS_RNIDA_HOST =	0x0a,
	ELS_RNIDA_SUBSYS =	0x0b,	/* storage subsystem (e.g., RAID) */
	ELS_RNIDA_ACCESS =	0x0e,	/* access device (e.g. media changer) */
	ELS_RNIDA_NAS =		0x11,	/* NAS server */
	ELS_RNIDA_BRIDGE =	0x12,	/* bridge */
	ELS_RNIDA_VIRT =	0x13,	/* virtualization device */
	ELS_RNIDA_MF =		0xff,	/* multifunction device (bits below) */
	ELS_RNIDA_MF_HUB =	1UL << 31, 	/* hub */
	ELS_RNIDA_MF_SW =	1UL << 30, 	/* switch */
	ELS_RNIDA_MF_GW =	1UL << 29,	/* gateway */
	ELS_RNIDA_MF_ST =	1UL << 28,	/* storage */
	ELS_RNIDA_MF_HOST =	1UL << 27,	/* host */
	ELS_RNIDA_MF_SUB =	1UL << 26,	/* storage subsystem */
	ELS_RNIDA_MF_ACC =	1UL << 25,	/* storage access dev */
	ELS_RNIDA_MF_WDM =	1UL << 24,	/* wavelength division mux */
	ELS_RNIDA_MF_NAS =	1UL << 23,	/* NAS server */
	ELS_RNIDA_MF_BR =	1UL << 22,	/* bridge */
	ELS_RNIDA_MF_VIRT =	1UL << 21,	/* virtualization device */
};

enum fc_els_rnid_mgmt {
	ELS_RNIDM_SNMP =	0,
	ELS_RNIDM_TELNET =	1,
	ELS_RNIDM_HTTP =	2,
	ELS_RNIDM_HTTPS =	3,
	ELS_RNIDM_XML =		4,	/* HTTP + XML */
};

enum fc_els_rnid_ipver {
	ELS_RNIDIP_NONE =	0,	/* no IP support or node mgmt. */
	ELS_RNIDIP_V4 =		1,	/* IPv4 */
	ELS_RNIDIP_V6 =		2,	/* IPv6 */
};

/*
 * ELS RPL - Read Port List.
 */
struct fc_els_rpl {
	__u8		rpl_cmd;	/* command */
	__u8		rpl_resv[5];	/* reserved - must be zero */
	__be16		rpl_max_size;	/* maximum response size or zero */
	__u8		rpl_resv1;	/* reserved - must be zero */
	__u8		rpl_index[3];	/* starting index */
};

/*
 * Port number block in RPL response.
 */
struct fc_els_pnb {
	__be32		pnb_phys_pn;	/* physical port number */
	__u8		pnb_resv;	/* reserved */
	__u8		pnb_port_id[3];	/* port ID */
	__be64		pnb_wwpn;	/* port name */
};

/*
 * RPL LS_ACC response.
 */
struct fc_els_rpl_resp {
	__u8		rpl_cmd;	/* ELS_LS_ACC */
	__u8		rpl_resv1;	/* reserved - must be zero */
	__be16		rpl_plen;	/* payload length */
	__u8		rpl_resv2;	/* reserved - must be zero */
	__u8		rpl_llen[3];	/* list length */
	__u8		rpl_resv3;	/* reserved - must be zero */
	__u8		rpl_index[3];	/* starting index */
	struct fc_els_pnb rpl_pnb[1];	/* variable number of PNBs */
};

/*
 * Link Error Status Block.
 */
struct fc_els_lesb {
	__be32		lesb_link_fail;	/* link failure count */
	__be32		lesb_sync_loss;	/* loss of synchronization count */
	__be32		lesb_sig_loss;	/* loss of signal count */
	__be32		lesb_prim_err;	/* primitive sequence error count */
	__be32		lesb_inv_word;	/* invalid transmission word count */
	__be32		lesb_inv_crc;	/* invalid CRC count */
};

/*
 * ELS RPS - Read Port Status Block request.
 */
struct fc_els_rps {
	__u8		rps_cmd;	/* command */
	__u8		rps_resv[2];	/* reserved - must be zero */
	__u8		rps_flag;	/* flag - see below */
	__be64		rps_port_spec;	/* port selection */
};

enum fc_els_rps_flag {
	FC_ELS_RPS_DID =	0x00,	/* port identified by D_ID of req. */
	FC_ELS_RPS_PPN =	0x01,	/* port_spec is physical port number */
	FC_ELS_RPS_WWPN =	0x02,	/* port_spec is port WWN */
};

/*
 * ELS RPS LS_ACC response.
 */
struct fc_els_rps_resp {
	__u8		rps_cmd;	/* command - LS_ACC */
	__u8		rps_resv[2];	/* reserved - must be zero */
	__u8		rps_flag;	/* flag - see below */
	__u8		rps_resv2[2];	/* reserved */
	__be16		rps_status;	/* port status - see below */
	struct fc_els_lesb rps_lesb;	/* link error status block */
};

enum fc_els_rps_resp_flag {
	FC_ELS_RPS_LPEV =	0x01,	/* L_port extension valid */
};

enum fc_els_rps_resp_status {
	FC_ELS_RPS_PTP =	1 << 5,	/* point-to-point connection */
	FC_ELS_RPS_LOOP =	1 << 4,	/* loop mode */
	FC_ELS_RPS_FAB =	1 << 3,	/* fabric present */
	FC_ELS_RPS_NO_SIG =	1 << 2,	/* loss of signal */
	FC_ELS_RPS_NO_SYNC =	1 << 1,	/* loss of synchronization */
	FC_ELS_RPS_RESET =	1 << 0,	/* in link reset protocol */
};

/*
 * ELS LIRR - Link Incident Record Registration request.
 */
struct fc_els_lirr {
	__u8		lirr_cmd;	/* command */
	__u8		lirr_resv[3];	/* reserved - must be zero */
	__u8		lirr_func;	/* registration function */
	__u8		lirr_fmt;	/* FC-4 type of RLIR requested */
	__u8		lirr_resv2[2];	/* reserved - must be zero */
};

enum fc_els_lirr_func {
	ELS_LIRR_SET_COND = 	0x01,	/* set - conditionally receive */
	ELS_LIRR_SET_UNCOND = 	0x02,	/* set - unconditionally receive */
	ELS_LIRR_CLEAR = 	0xff	/* clear registration */
};

/*
 * ELS SRL - Scan Remote Loop request.
 */
struct fc_els_srl {
	__u8		srl_cmd;	/* command */
	__u8		srl_resv[3];	/* reserved - must be zero */
	__u8		srl_flag;	/* flag - see below */
	__u8		srl_flag_param[3];	/* flag parameter */
};

enum fc_els_srl_flag {
	FC_ELS_SRL_ALL =	0x00,	/* scan all FL ports */
	FC_ELS_SRL_ONE =	0x01,	/* scan specified loop */
	FC_ELS_SRL_EN_PER =	0x02,	/* enable periodic scanning (param) */
	FC_ELS_SRL_DIS_PER =	0x03,	/* disable periodic scanning */
};

/*
 * ELS RLS - Read Link Error Status Block request.
 */
struct fc_els_rls {
	__u8		rls_cmd;	/* command */
	__u8		rls_resv[4];	/* reserved - must be zero */
	__u8		rls_port_id[3];	/* port ID */
};

/*
 * ELS RLS LS_ACC Response.
 */
struct fc_els_rls_resp {
	__u8		rls_cmd;	/* ELS_LS_ACC */
	__u8		rls_resv[3];	/* reserved - must be zero */
	struct fc_els_lesb rls_lesb;	/* link error status block */
};

/*
 * ELS RLIR - Registered Link Incident Report.
 * This is followed by the CLIR and the CLID, described below.
 */
struct fc_els_rlir {
	__u8		rlir_cmd;	/* command */
	__u8		rlir_resv[3];	/* reserved - must be zero */
	__u8		rlir_fmt;	/* format (FC4-type if type specific) */
	__u8		rlir_clr_len;	/* common link incident record length */
	__u8		rlir_cld_len;	/* common link incident desc. length */
	__u8		rlir_slr_len;	/* spec. link incident record length */
};

/*
 * CLIR - Common Link Incident Record Data. - Sent via RLIR.
 */
struct fc_els_clir {
	__be64		clir_wwpn;	/* incident port name */
	__be64		clir_wwnn;	/* incident port node name */
	__u8		clir_port_type;	/* incident port type */
	__u8		clir_port_id[3];	/* incident port ID */

	__be64		clir_conn_wwpn;	/* connected port name */
	__be64		clir_conn_wwnn;	/* connected node name */
	__be64		clir_fab_name;	/* fabric name */
	__be32		clir_phys_port;	/* physical port number */
	__be32		clir_trans_id;	/* transaction ID */
	__u8		clir_resv[3];	/* reserved */
	__u8		clir_ts_fmt;	/* time stamp format */
	__be64		clir_timestamp;	/* time stamp */
};

/*
 * CLIR clir_ts_fmt - time stamp format values.
 */
enum fc_els_clir_ts_fmt {
	ELS_CLIR_TS_UNKNOWN = 	0,	/* time stamp field unknown */
	ELS_CLIR_TS_SEC_FRAC = 	1,	/* time in seconds and fractions */
	ELS_CLIR_TS_CSU =	2,	/* time in clock synch update format */
};

/*
 * Common Link Incident Descriptor - sent via RLIR.
 */
struct fc_els_clid {
	__u8		clid_iq;	/* incident qualifier flags */
	__u8		clid_ic;	/* incident code */
	__be16		clid_epai;	/* domain/area of ISL */
};

/*
 * CLID incident qualifier flags.
 */
enum fc_els_clid_iq {
	ELS_CLID_SWITCH =	0x20,	/* incident port is a switch node */
	ELS_CLID_E_PORT =	0x10,	/* incident is an ISL (E) port */
	ELS_CLID_SEV_MASK =	0x0c,	/* severity 2-bit field mask */
	ELS_CLID_SEV_INFO =	0x00,	/* report is informational */
	ELS_CLID_SEV_INOP =	0x08,	/* link not operational */
	ELS_CLID_SEV_DEG =	0x04,	/* link degraded but operational */
	ELS_CLID_LASER =	0x02,	/* subassembly is a laser */
	ELS_CLID_FRU =		0x01,	/* format can identify a FRU */
};

/*
 * CLID incident code.
 */
enum fc_els_clid_ic {
	ELS_CLID_IC_IMPL =	1,	/* implicit incident */
	ELS_CLID_IC_BER =	2,	/* bit-error-rate threshold exceeded */
	ELS_CLID_IC_LOS =	3,	/* loss of synch or signal */
	ELS_CLID_IC_NOS =	4,	/* non-operational primitive sequence */
	ELS_CLID_IC_PST =	5,	/* primitive sequence timeout */
	ELS_CLID_IC_INVAL =	6,	/* invalid primitive sequence */
	ELS_CLID_IC_LOOP_TO =	7,	/* loop initialization time out */
	ELS_CLID_IC_LIP =	8,	/* receiving LIP */
};

#endif /* _FC_ELS_H_ */