xref: /linux/include/uapi/scsi/fc/fc_els.h (revision 94dfc73e)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3  * Copyright(c) 2007 Intel Corporation. All rights reserved.
4  *
5  * Maintained at www.Open-FCoE.org
6  */
7 
8 #ifndef _FC_ELS_H_
9 #define	_FC_ELS_H_
10 
11 #include <linux/types.h>
12 #include <asm/byteorder.h>
13 
14 /*
15  * Fibre Channel Switch - Enhanced Link Services definitions.
16  * From T11 FC-LS Rev 1.2 June 7, 2005.
17  */
18 
19 /*
20  * ELS Command codes - byte 0 of the frame payload
21  */
22 enum fc_els_cmd {
23 	ELS_LS_RJT =	0x01,	/* ESL reject */
24 	ELS_LS_ACC =	0x02,	/* ESL Accept */
25 	ELS_PLOGI =	0x03,	/* N_Port login */
26 	ELS_FLOGI =	0x04,	/* F_Port login */
27 	ELS_LOGO =	0x05,	/* Logout */
28 	ELS_ABTX =	0x06,	/* Abort exchange - obsolete */
29 	ELS_RCS =	0x07,	/* read connection status */
30 	ELS_RES =	0x08,	/* read exchange status block */
31 	ELS_RSS =	0x09,	/* read sequence status block */
32 	ELS_RSI =	0x0a,	/* read sequence initiative */
33 	ELS_ESTS =	0x0b,	/* establish streaming */
34 	ELS_ESTC =	0x0c,	/* estimate credit */
35 	ELS_ADVC =	0x0d,	/* advise credit */
36 	ELS_RTV =	0x0e,	/* read timeout value */
37 	ELS_RLS =	0x0f,	/* read link error status block */
38 	ELS_ECHO =	0x10,	/* echo */
39 	ELS_TEST =	0x11,	/* test */
40 	ELS_RRQ =	0x12,	/* reinstate recovery qualifier */
41 	ELS_REC =	0x13,	/* read exchange concise */
42 	ELS_SRR =	0x14,	/* sequence retransmission request */
43 	ELS_FPIN =	0x16,	/* Fabric Performance Impact Notification */
44 	ELS_EDC =	0x17,	/* Exchange Diagnostic Capabilities */
45 	ELS_RDP =	0x18,	/* Read Diagnostic Parameters */
46 	ELS_RDF =	0x19,	/* Register Diagnostic Functions */
47 	ELS_PRLI =	0x20,	/* process login */
48 	ELS_PRLO =	0x21,	/* process logout */
49 	ELS_SCN =	0x22,	/* state change notification */
50 	ELS_TPLS =	0x23,	/* test process login state */
51 	ELS_TPRLO =	0x24,	/* third party process logout */
52 	ELS_LCLM =	0x25,	/* login control list mgmt (obs) */
53 	ELS_GAID =	0x30,	/* get alias_ID */
54 	ELS_FACT =	0x31,	/* fabric activate alias_id */
55 	ELS_FDACDT =	0x32,	/* fabric deactivate alias_id */
56 	ELS_NACT =	0x33,	/* N-port activate alias_id */
57 	ELS_NDACT =	0x34,	/* N-port deactivate alias_id */
58 	ELS_QOSR =	0x40,	/* quality of service request */
59 	ELS_RVCS =	0x41,	/* read virtual circuit status */
60 	ELS_PDISC =	0x50,	/* discover N_port service params */
61 	ELS_FDISC =	0x51,	/* discover F_port service params */
62 	ELS_ADISC =	0x52,	/* discover address */
63 	ELS_RNC =	0x53,	/* report node cap (obs) */
64 	ELS_FARP_REQ =	0x54,	/* FC ARP request */
65 	ELS_FARP_REPL =	0x55,	/* FC ARP reply */
66 	ELS_RPS =	0x56,	/* read port status block */
67 	ELS_RPL =	0x57,	/* read port list */
68 	ELS_RPBC =	0x58,	/* read port buffer condition */
69 	ELS_FAN =	0x60,	/* fabric address notification */
70 	ELS_RSCN =	0x61,	/* registered state change notification */
71 	ELS_SCR =	0x62,	/* state change registration */
72 	ELS_RNFT =	0x63,	/* report node FC-4 types */
73 	ELS_CSR =	0x68,	/* clock synch. request */
74 	ELS_CSU =	0x69,	/* clock synch. update */
75 	ELS_LINIT =	0x70,	/* loop initialize */
76 	ELS_LSTS =	0x72,	/* loop status */
77 	ELS_RNID =	0x78,	/* request node ID data */
78 	ELS_RLIR =	0x79,	/* registered link incident report */
79 	ELS_LIRR =	0x7a,	/* link incident record registration */
80 	ELS_SRL =	0x7b,	/* scan remote loop */
81 	ELS_SBRP =	0x7c,	/* set bit-error reporting params */
82 	ELS_RPSC =	0x7d,	/* report speed capabilities */
83 	ELS_QSA =	0x7e,	/* query security attributes */
84 	ELS_EVFP =	0x7f,	/* exchange virt. fabrics params */
85 	ELS_LKA =	0x80,	/* link keep-alive */
86 	ELS_AUTH_ELS =	0x90,	/* authentication ELS */
87 };
88 
89 /*
90  * Initializer useful for decoding table.
91  * Please keep this in sync with the above definitions.
92  */
93 #define	FC_ELS_CMDS_INIT {			\
94 	[ELS_LS_RJT] =	"LS_RJT",		\
95 	[ELS_LS_ACC] =	"LS_ACC",		\
96 	[ELS_PLOGI] =	"PLOGI",		\
97 	[ELS_FLOGI] =	"FLOGI",		\
98 	[ELS_LOGO] =	"LOGO",			\
99 	[ELS_ABTX] =	"ABTX",			\
100 	[ELS_RCS] =	"RCS",			\
101 	[ELS_RES] =	"RES",			\
102 	[ELS_RSS] =	"RSS",			\
103 	[ELS_RSI] =	"RSI",			\
104 	[ELS_ESTS] =	"ESTS",			\
105 	[ELS_ESTC] =	"ESTC",			\
106 	[ELS_ADVC] =	"ADVC",			\
107 	[ELS_RTV] =	"RTV",			\
108 	[ELS_RLS] =	"RLS",			\
109 	[ELS_ECHO] =	"ECHO",			\
110 	[ELS_TEST] =	"TEST",			\
111 	[ELS_RRQ] =	"RRQ",			\
112 	[ELS_REC] =	"REC",			\
113 	[ELS_SRR] =	"SRR",			\
114 	[ELS_FPIN] =	"FPIN",			\
115 	[ELS_EDC] =	"EDC",			\
116 	[ELS_RDP] =	"RDP",			\
117 	[ELS_RDF] =	"RDF",			\
118 	[ELS_PRLI] =	"PRLI",			\
119 	[ELS_PRLO] =	"PRLO",			\
120 	[ELS_SCN] =	"SCN",			\
121 	[ELS_TPLS] =	"TPLS",			\
122 	[ELS_TPRLO] =	"TPRLO",		\
123 	[ELS_LCLM] =	"LCLM",			\
124 	[ELS_GAID] =	"GAID",			\
125 	[ELS_FACT] =	"FACT",			\
126 	[ELS_FDACDT] =	"FDACDT",		\
127 	[ELS_NACT] =	"NACT",			\
128 	[ELS_NDACT] =	"NDACT",		\
129 	[ELS_QOSR] =	"QOSR",			\
130 	[ELS_RVCS] =	"RVCS",			\
131 	[ELS_PDISC] =	"PDISC",		\
132 	[ELS_FDISC] =	"FDISC",		\
133 	[ELS_ADISC] =	"ADISC",		\
134 	[ELS_RNC] =	"RNC",			\
135 	[ELS_FARP_REQ] = "FARP_REQ",		\
136 	[ELS_FARP_REPL] =  "FARP_REPL",		\
137 	[ELS_RPS] =	"RPS",			\
138 	[ELS_RPL] =	"RPL",			\
139 	[ELS_RPBC] =	"RPBC",			\
140 	[ELS_FAN] =	"FAN",			\
141 	[ELS_RSCN] =	"RSCN",			\
142 	[ELS_SCR] =	"SCR",			\
143 	[ELS_RNFT] =	"RNFT",			\
144 	[ELS_CSR] =	"CSR",			\
145 	[ELS_CSU] =	"CSU",			\
146 	[ELS_LINIT] =	"LINIT",		\
147 	[ELS_LSTS] =	"LSTS",			\
148 	[ELS_RNID] =	"RNID",			\
149 	[ELS_RLIR] =	"RLIR",			\
150 	[ELS_LIRR] =	"LIRR",			\
151 	[ELS_SRL] =	"SRL",			\
152 	[ELS_SBRP] =	"SBRP",			\
153 	[ELS_RPSC] =	"RPSC",			\
154 	[ELS_QSA] =	"QSA",			\
155 	[ELS_EVFP] =	"EVFP",			\
156 	[ELS_LKA] =	"LKA",			\
157 	[ELS_AUTH_ELS] = "AUTH_ELS",		\
158 }
159 
160 /*
161  * LS_ACC payload.
162  */
163 struct fc_els_ls_acc {
164 	__u8          la_cmd;		/* command code ELS_LS_ACC */
165 	__u8          la_resv[3];	/* reserved */
166 };
167 
168 /*
169  * ELS reject payload.
170  */
171 struct fc_els_ls_rjt {
172 	__u8	er_cmd;		/* command code ELS_LS_RJT */
173 	__u8	er_resv[4];	/* reserved must be zero */
174 	__u8	er_reason;	/* reason (enum fc_els_rjt_reason below) */
175 	__u8	er_explan;	/* explanation (enum fc_els_rjt_explan below) */
176 	__u8	er_vendor;	/* vendor specific code */
177 };
178 
179 /*
180  * ELS reject reason codes (er_reason).
181  */
182 enum fc_els_rjt_reason {
183 	ELS_RJT_NONE =		0,	/* no reject - not to be sent */
184 	ELS_RJT_INVAL =		0x01,	/* invalid ELS command code */
185 	ELS_RJT_LOGIC =		0x03,	/* logical error */
186 	ELS_RJT_BUSY =		0x05,	/* logical busy */
187 	ELS_RJT_PROT =		0x07,	/* protocol error */
188 	ELS_RJT_UNAB =		0x09,	/* unable to perform command request */
189 	ELS_RJT_UNSUP =		0x0b,	/* command not supported */
190 	ELS_RJT_INPROG =	0x0e,	/* command already in progress */
191 	ELS_RJT_FIP =		0x20,	/* FIP error */
192 	ELS_RJT_VENDOR =	0xff,	/* vendor specific error */
193 };
194 
195 
196 /*
197  * reason code explanation (er_explan).
198  */
199 enum fc_els_rjt_explan {
200 	ELS_EXPL_NONE =		0x00,	/* No additional explanation */
201 	ELS_EXPL_SPP_OPT_ERR =	0x01,	/* service parameter error - options */
202 	ELS_EXPL_SPP_ICTL_ERR =	0x03,	/* service parm error - initiator ctl */
203 	ELS_EXPL_AH =		0x11,	/* invalid association header */
204 	ELS_EXPL_AH_REQ =	0x13,	/* association_header required */
205 	ELS_EXPL_SID =		0x15,	/* invalid originator S_ID */
206 	ELS_EXPL_OXID_RXID =	0x17,	/* invalid OX_ID-RX_ID combination */
207 	ELS_EXPL_INPROG =	0x19,	/* Request already in progress */
208 	ELS_EXPL_PLOGI_REQD =	0x1e,	/* N_Port login required */
209 	ELS_EXPL_INSUF_RES =	0x29,	/* insufficient resources */
210 	ELS_EXPL_UNAB_DATA =	0x2a,	/* unable to supply requested data */
211 	ELS_EXPL_UNSUPR =	0x2c,	/* Request not supported */
212 	ELS_EXPL_INV_LEN =	0x2d,	/* Invalid payload length */
213 	ELS_EXPL_NOT_NEIGHBOR = 0x62,	/* VN2VN_Port not in neighbor set */
214 	/* TBD - above definitions incomplete */
215 };
216 
217 /*
218  * Link Service TLV Descriptor Tag Values
219  */
220 enum fc_ls_tlv_dtag {
221 	ELS_DTAG_LS_REQ_INFO =		0x00000001,
222 		/* Link Service Request Information Descriptor */
223 	ELS_DTAG_LNK_FAULT_CAP =	0x0001000D,
224 		/* Link Fault Capability Descriptor */
225 	ELS_DTAG_CG_SIGNAL_CAP =	0x0001000F,
226 		/* Congestion Signaling Capability Descriptor */
227 	ELS_DTAG_LNK_INTEGRITY =	0x00020001,
228 		/* Link Integrity Notification Descriptor */
229 	ELS_DTAG_DELIVERY =		0x00020002,
230 		/* Delivery Notification Descriptor */
231 	ELS_DTAG_PEER_CONGEST =		0x00020003,
232 		/* Peer Congestion Notification Descriptor */
233 	ELS_DTAG_CONGESTION =		0x00020004,
234 		/* Congestion Notification Descriptor */
235 	ELS_DTAG_FPIN_REGISTER =	0x00030001,
236 		/* FPIN Registration Descriptor */
237 };
238 
239 /*
240  * Initializer useful for decoding table.
241  * Please keep this in sync with the above definitions.
242  */
243 #define FC_LS_TLV_DTAG_INIT {					      \
244 	{ ELS_DTAG_LS_REQ_INFO,		"Link Service Request Information" }, \
245 	{ ELS_DTAG_LNK_FAULT_CAP,	"Link Fault Capability" },	      \
246 	{ ELS_DTAG_CG_SIGNAL_CAP,	"Congestion Signaling Capability" },  \
247 	{ ELS_DTAG_LNK_INTEGRITY,	"Link Integrity Notification" },      \
248 	{ ELS_DTAG_DELIVERY,		"Delivery Notification Present" },    \
249 	{ ELS_DTAG_PEER_CONGEST,	"Peer Congestion Notification" },     \
250 	{ ELS_DTAG_CONGESTION,		"Congestion Notification" },	      \
251 	{ ELS_DTAG_FPIN_REGISTER,	"FPIN Registration" },		      \
252 }
253 
254 
255 /*
256  * Generic Link Service TLV Descriptor format
257  *
258  * This structure, as it defines no payload, will also be referred to
259  * as the "tlv header" - which contains the tag and len fields.
260  */
261 struct fc_tlv_desc {
262 	__be32		desc_tag;	/* Notification Descriptor Tag */
263 	__be32		desc_len;	/* Length of Descriptor (in bytes).
264 					 * Size of descriptor excluding
265 					 * desc_tag and desc_len fields.
266 					 */
267 	__u8		desc_value[];  /* Descriptor Value */
268 };
269 
270 /* Descriptor tag and len fields are considered the mandatory header
271  * for a descriptor
272  */
273 #define FC_TLV_DESC_HDR_SZ	sizeof(struct fc_tlv_desc)
274 
275 /*
276  * Macro, used when initializing payloads, to return the descriptor length.
277  * Length is size of descriptor minus the tag and len fields.
278  */
279 #define FC_TLV_DESC_LENGTH_FROM_SZ(desc)	\
280 		(sizeof(desc) - FC_TLV_DESC_HDR_SZ)
281 
282 /* Macro, used on received payloads, to return the descriptor length */
283 #define FC_TLV_DESC_SZ_FROM_LENGTH(tlv)		\
284 		(__be32_to_cpu((tlv)->desc_len) + FC_TLV_DESC_HDR_SZ)
285 
286 /*
287  * This helper is used to walk descriptors in a descriptor list.
288  * Given the address of the current descriptor, which minimally contains a
289  * tag and len field, calculate the address of the next descriptor based
290  * on the len field.
291  */
fc_tlv_next_desc(void * desc)292 static inline void *fc_tlv_next_desc(void *desc)
293 {
294 	struct fc_tlv_desc *tlv = desc;
295 
296 	return (desc + FC_TLV_DESC_SZ_FROM_LENGTH(tlv));
297 }
298 
299 
300 /*
301  * Link Service Request Information Descriptor
302  */
303 struct fc_els_lsri_desc {
304 	__be32		desc_tag;	/* descriptor tag (0x0000 0001) */
305 	__be32		desc_len;	/* Length of Descriptor (in bytes) (4).
306 					 * Size of descriptor excluding
307 					 * desc_tag and desc_len fields.
308 					 */
309 	struct {
310 		__u8	cmd;		/* ELS cmd byte */
311 		__u8	bytes[3];	/* bytes 1..3 */
312 	} rqst_w0;			/* Request word 0 */
313 };
314 
315 
316 /*
317  * Common service parameters (N ports).
318  */
319 struct fc_els_csp {
320 	__u8		sp_hi_ver;	/* highest version supported (obs.) */
321 	__u8		sp_lo_ver;	/* highest version supported (obs.) */
322 	__be16		sp_bb_cred;	/* buffer-to-buffer credits */
323 	__be16		sp_features;	/* common feature flags */
324 	__be16		sp_bb_data;	/* b-b state number and data field sz */
325 	union {
326 		struct {
327 			__be16	_sp_tot_seq; /* total concurrent sequences */
328 			__be16	_sp_rel_off; /* rel. offset by info cat */
329 		} sp_plogi;
330 		struct {
331 			__be32	_sp_r_a_tov; /* resource alloc. timeout msec */
332 		} sp_flogi_acc;
333 	} sp_u;
334 	__be32		sp_e_d_tov;	/* error detect timeout value */
335 };
336 #define	sp_tot_seq	sp_u.sp_plogi._sp_tot_seq
337 #define	sp_rel_off	sp_u.sp_plogi._sp_rel_off
338 #define	sp_r_a_tov	sp_u.sp_flogi_acc._sp_r_a_tov
339 
340 #define	FC_SP_BB_DATA_MASK 0xfff /* mask for data field size in sp_bb_data */
341 
342 /*
343  * Minimum and maximum values for max data field size in service parameters.
344  */
345 #define	FC_SP_MIN_MAX_PAYLOAD	FC_MIN_MAX_PAYLOAD
346 #define	FC_SP_MAX_MAX_PAYLOAD	FC_MAX_PAYLOAD
347 
348 /*
349  * sp_features
350  */
351 #define	FC_SP_FT_NPIV	0x8000	/* multiple N_Port_ID support (FLOGI) */
352 #define	FC_SP_FT_CIRO	0x8000	/* continuously increasing rel off (PLOGI) */
353 #define	FC_SP_FT_CLAD	0x8000	/* clean address (in FLOGI LS_ACC) */
354 #define	FC_SP_FT_RAND	0x4000	/* random relative offset */
355 #define	FC_SP_FT_VAL	0x2000	/* valid vendor version level */
356 #define	FC_SP_FT_NPIV_ACC	0x2000	/* NPIV assignment (FLOGI LS_ACC) */
357 #define	FC_SP_FT_FPORT	0x1000	/* F port (1) vs. N port (0) */
358 #define	FC_SP_FT_ABB	0x0800	/* alternate BB_credit management */
359 #define	FC_SP_FT_EDTR	0x0400	/* E_D_TOV Resolution is nanoseconds */
360 #define	FC_SP_FT_MCAST	0x0200	/* multicast */
361 #define	FC_SP_FT_BCAST	0x0100	/* broadcast */
362 #define	FC_SP_FT_HUNT	0x0080	/* hunt group */
363 #define	FC_SP_FT_SIMP	0x0040	/* dedicated simplex */
364 #define	FC_SP_FT_SEC	0x0020	/* reserved for security */
365 #define	FC_SP_FT_CSYN	0x0010	/* clock synch. supported */
366 #define	FC_SP_FT_RTTOV	0x0008	/* R_T_TOV value 100 uS, else 100 mS */
367 #define	FC_SP_FT_HALF	0x0004	/* dynamic half duplex */
368 #define	FC_SP_FT_SEQC	0x0002	/* SEQ_CNT */
369 #define	FC_SP_FT_PAYL	0x0001	/* FLOGI payload length 256, else 116 */
370 
371 /*
372  * Class-specific service parameters.
373  */
374 struct fc_els_cssp {
375 	__be16		cp_class;	/* class flags */
376 	__be16		cp_init;	/* initiator flags */
377 	__be16		cp_recip;	/* recipient flags */
378 	__be16		cp_rdfs;	/* receive data field size */
379 	__be16		cp_con_seq;	/* concurrent sequences */
380 	__be16		cp_ee_cred;	/* N-port end-to-end credit */
381 	__u8		cp_resv1;	/* reserved */
382 	__u8		cp_open_seq;	/* open sequences per exchange */
383 	__u8		_cp_resv2[2];	/* reserved */
384 };
385 
386 /*
387  * cp_class flags.
388  */
389 #define	FC_CPC_VALID	0x8000		/* class valid */
390 #define	FC_CPC_IMIX	0x4000		/* intermix mode */
391 #define	FC_CPC_SEQ	0x0800		/* sequential delivery */
392 #define	FC_CPC_CAMP	0x0200		/* camp-on */
393 #define	FC_CPC_PRI	0x0080		/* priority */
394 
395 /*
396  * cp_init flags.
397  * (TBD: not all flags defined here).
398  */
399 #define	FC_CPI_CSYN	0x0010		/* clock synch. capable */
400 
401 /*
402  * cp_recip flags.
403  */
404 #define	FC_CPR_CSYN	0x0008		/* clock synch. capable */
405 
406 /*
407  * NFC_ELS_FLOGI: Fabric login request.
408  * NFC_ELS_PLOGI: Port login request (same format).
409  */
410 struct fc_els_flogi {
411 	__u8		fl_cmd;		/* command */
412 	__u8		_fl_resvd[3];	/* must be zero */
413 	struct fc_els_csp fl_csp;	/* common service parameters */
414 	__be64		fl_wwpn;	/* port name */
415 	__be64		fl_wwnn;	/* node name */
416 	struct fc_els_cssp fl_cssp[4];	/* class 1-4 service parameters */
417 	__u8		fl_vend[16];	/* vendor version level */
418 } __attribute__((__packed__));
419 
420 /*
421  * Process login service parameter page.
422  */
423 struct fc_els_spp {
424 	__u8		spp_type;	/* type code or common service params */
425 	__u8		spp_type_ext;	/* type code extension */
426 	__u8		spp_flags;
427 	__u8		_spp_resvd;
428 	__be32		spp_orig_pa;	/* originator process associator */
429 	__be32		spp_resp_pa;	/* responder process associator */
430 	__be32		spp_params;	/* service parameters */
431 };
432 
433 /*
434  * spp_flags.
435  */
436 #define	FC_SPP_OPA_VAL	    0x80	/* originator proc. assoc. valid */
437 #define	FC_SPP_RPA_VAL	    0x40	/* responder proc. assoc. valid */
438 #define	FC_SPP_EST_IMG_PAIR 0x20	/* establish image pair */
439 #define	FC_SPP_RESP_MASK    0x0f	/* mask for response code (below) */
440 
441 /*
442  * SPP response code in spp_flags - lower 4 bits.
443  */
444 enum fc_els_spp_resp {
445 	FC_SPP_RESP_ACK	=	1,	/* request executed */
446 	FC_SPP_RESP_RES =	2,	/* unable due to lack of resources */
447 	FC_SPP_RESP_INIT =	3,	/* initialization not complete */
448 	FC_SPP_RESP_NO_PA = 	4,	/* unknown process associator */
449 	FC_SPP_RESP_CONF = 	5,	/* configuration precludes image pair */
450 	FC_SPP_RESP_COND = 	6,	/* request completed conditionally */
451 	FC_SPP_RESP_MULT = 	7,	/* unable to handle multiple SPPs */
452 	FC_SPP_RESP_INVL = 	8,	/* SPP is invalid */
453 };
454 
455 /*
456  * ELS_RRQ - Reinstate Recovery Qualifier
457  */
458 struct fc_els_rrq {
459 	__u8		rrq_cmd;	/* command (0x12) */
460 	__u8		rrq_zero[3];	/* specified as zero - part of cmd */
461 	__u8		rrq_resvd;	/* reserved */
462 	__u8		rrq_s_id[3];	/* originator FID */
463 	__be16		rrq_ox_id;	/* originator exchange ID */
464 	__be16		rrq_rx_id;	/* responders exchange ID */
465 };
466 
467 /*
468  * ELS_REC - Read exchange concise.
469  */
470 struct fc_els_rec {
471 	__u8		rec_cmd;	/* command (0x13) */
472 	__u8		rec_zero[3];	/* specified as zero - part of cmd */
473 	__u8		rec_resvd;	/* reserved */
474 	__u8		rec_s_id[3];	/* originator FID */
475 	__be16		rec_ox_id;	/* originator exchange ID */
476 	__be16		rec_rx_id;	/* responders exchange ID */
477 };
478 
479 /*
480  * ELS_REC LS_ACC payload.
481  */
482 struct fc_els_rec_acc {
483 	__u8		reca_cmd;	/* accept (0x02) */
484 	__u8		reca_zero[3];	/* specified as zero - part of cmd */
485 	__be16		reca_ox_id;	/* originator exchange ID */
486 	__be16		reca_rx_id;	/* responders exchange ID */
487 	__u8		reca_resvd1;	/* reserved */
488 	__u8		reca_ofid[3];	/* originator FID */
489 	__u8		reca_resvd2;	/* reserved */
490 	__u8		reca_rfid[3];	/* responder FID */
491 	__be32		reca_fc4value;	/* FC4 value */
492 	__be32		reca_e_stat;	/* ESB (exchange status block) status */
493 };
494 
495 /*
496  * ELS_PRLI - Process login request and response.
497  */
498 struct fc_els_prli {
499 	__u8		prli_cmd;	/* command */
500 	__u8		prli_spp_len;	/* length of each serv. parm. page */
501 	__be16		prli_len;	/* length of entire payload */
502 	/* service parameter pages follow */
503 };
504 
505 /*
506  * ELS_PRLO - Process logout request and response.
507  */
508 struct fc_els_prlo {
509 	__u8            prlo_cmd;       /* command */
510 	__u8            prlo_obs;       /* obsolete, but shall be set to 10h */
511 	__be16          prlo_len;       /* payload length */
512 };
513 
514 /*
515  * ELS_ADISC payload
516  */
517 struct fc_els_adisc {
518 	__u8		adisc_cmd;
519 	__u8		adisc_resv[3];
520 	__u8            adisc_resv1;
521 	__u8            adisc_hard_addr[3];
522 	__be64          adisc_wwpn;
523 	__be64          adisc_wwnn;
524 	__u8            adisc_resv2;
525 	__u8            adisc_port_id[3];
526 } __attribute__((__packed__));
527 
528 /*
529  * ELS_LOGO - process or fabric logout.
530  */
531 struct fc_els_logo {
532 	__u8		fl_cmd;		/* command code */
533 	__u8		fl_zero[3];	/* specified as zero - part of cmd */
534 	__u8		fl_resvd;	/* reserved */
535 	__u8		fl_n_port_id[3];/* N port ID */
536 	__be64		fl_n_port_wwn;	/* port name */
537 };
538 
539 /*
540  * ELS_RTV - read timeout value.
541  */
542 struct fc_els_rtv {
543 	__u8		rtv_cmd;	/* command code 0x0e */
544 	__u8		rtv_zero[3];	/* specified as zero - part of cmd */
545 };
546 
547 /*
548  * LS_ACC for ELS_RTV - read timeout value.
549  */
550 struct fc_els_rtv_acc {
551 	__u8		rtv_cmd;	/* command code 0x02 */
552 	__u8		rtv_zero[3];	/* specified as zero - part of cmd */
553 	__be32		rtv_r_a_tov;	/* resource allocation timeout value */
554 	__be32		rtv_e_d_tov;	/* error detection timeout value */
555 	__be32		rtv_toq;	/* timeout qualifier (see below) */
556 };
557 
558 /*
559  * rtv_toq bits.
560  */
561 #define	FC_ELS_RTV_EDRES (1 << 26)	/* E_D_TOV resolution is nS else mS */
562 #define	FC_ELS_RTV_RTTOV (1 << 19)	/* R_T_TOV is 100 uS else 100 mS */
563 
564 /*
565  * ELS_SCR - state change registration payload.
566  */
567 struct fc_els_scr {
568 	__u8		scr_cmd;	/* command code */
569 	__u8		scr_resv[6];	/* reserved */
570 	__u8		scr_reg_func;	/* registration function (see below) */
571 };
572 
573 enum fc_els_scr_func {
574 	ELS_SCRF_FAB =	1,	/* fabric-detected registration */
575 	ELS_SCRF_NPORT = 2,	/* Nx_Port-detected registration */
576 	ELS_SCRF_FULL =	3,	/* full registration */
577 	ELS_SCRF_CLEAR = 255,	/* remove any current registrations */
578 };
579 
580 /*
581  * ELS_RSCN - registered state change notification payload.
582  */
583 struct fc_els_rscn {
584 	__u8		rscn_cmd;	/* RSCN opcode (0x61) */
585 	__u8		rscn_page_len;	/* page length (4) */
586 	__be16		rscn_plen;	/* payload length including this word */
587 
588 	/* followed by 4-byte generic affected Port_ID pages */
589 };
590 
591 struct fc_els_rscn_page {
592 	__u8		rscn_page_flags; /* event and address format */
593 	__u8		rscn_fid[3];	/* fabric ID */
594 };
595 
596 #define	ELS_RSCN_EV_QUAL_BIT	2	/* shift count for event qualifier */
597 #define	ELS_RSCN_EV_QUAL_MASK	0xf	/* mask for event qualifier */
598 #define	ELS_RSCN_ADDR_FMT_BIT	0	/* shift count for address format */
599 #define	ELS_RSCN_ADDR_FMT_MASK	0x3	/* mask for address format */
600 
601 enum fc_els_rscn_ev_qual {
602 	ELS_EV_QUAL_NONE = 0,		/* unspecified */
603 	ELS_EV_QUAL_NS_OBJ = 1,		/* changed name server object */
604 	ELS_EV_QUAL_PORT_ATTR = 2,	/* changed port attribute */
605 	ELS_EV_QUAL_SERV_OBJ = 3,	/* changed service object */
606 	ELS_EV_QUAL_SW_CONFIG = 4,	/* changed switch configuration */
607 	ELS_EV_QUAL_REM_OBJ = 5,	/* removed object */
608 };
609 
610 enum fc_els_rscn_addr_fmt {
611 	ELS_ADDR_FMT_PORT = 0,	/* rscn_fid is a port address */
612 	ELS_ADDR_FMT_AREA = 1,	/* rscn_fid is a area address */
613 	ELS_ADDR_FMT_DOM = 2,	/* rscn_fid is a domain address */
614 	ELS_ADDR_FMT_FAB = 3,	/* anything on fabric may have changed */
615 };
616 
617 /*
618  * ELS_RNID - request Node ID.
619  */
620 struct fc_els_rnid {
621 	__u8		rnid_cmd;	/* RNID opcode (0x78) */
622 	__u8		rnid_resv[3];	/* reserved */
623 	__u8		rnid_fmt;	/* data format */
624 	__u8		rnid_resv2[3];	/* reserved */
625 };
626 
627 /*
628  * Node Identification Data formats (rnid_fmt)
629  */
630 enum fc_els_rnid_fmt {
631 	ELS_RNIDF_NONE = 0,		/* no specific identification data */
632 	ELS_RNIDF_GEN = 0xdf,		/* general topology discovery format */
633 };
634 
635 /*
636  * ELS_RNID response.
637  */
638 struct fc_els_rnid_resp {
639 	__u8		rnid_cmd;	/* response code (LS_ACC) */
640 	__u8		rnid_resv[3];	/* reserved */
641 	__u8		rnid_fmt;	/* data format */
642 	__u8		rnid_cid_len;	/* common ID data length */
643 	__u8		rnid_resv2;	/* reserved */
644 	__u8		rnid_sid_len;	/* specific ID data length */
645 };
646 
647 struct fc_els_rnid_cid {
648 	__be64		rnid_wwpn;	/* N port name */
649 	__be64		rnid_wwnn;	/* node name */
650 };
651 
652 struct fc_els_rnid_gen {
653 	__u8		rnid_vend_id[16]; /* vendor-unique ID */
654 	__be32		rnid_atype;	/* associated type (see below) */
655 	__be32		rnid_phys_port;	/* physical port number */
656 	__be32		rnid_att_nodes;	/* number of attached nodes */
657 	__u8		rnid_node_mgmt;	/* node management (see below) */
658 	__u8		rnid_ip_ver;	/* IP version (see below) */
659 	__be16		rnid_prot_port;	/* UDP / TCP port number */
660 	__be32		rnid_ip_addr[4]; /* IP address */
661 	__u8		rnid_resvd[2];	/* reserved */
662 	__be16		rnid_vend_spec;	/* vendor-specific field */
663 };
664 
665 enum fc_els_rnid_atype {
666 	ELS_RNIDA_UNK =		0x01,	/* unknown */
667 	ELS_RNIDA_OTHER =	0x02,	/* none of the following */
668 	ELS_RNIDA_HUB =		0x03,
669 	ELS_RNIDA_SWITCH =	0x04,
670 	ELS_RNIDA_GATEWAY =	0x05,
671 	ELS_RNIDA_CONV =	0x06,   /* Obsolete, do not use this value */
672 	ELS_RNIDA_HBA =	        0x07,   /* Obsolete, do not use this value */
673 	ELS_RNIDA_PROXY =       0x08,   /* Obsolete, do not use this value */
674 	ELS_RNIDA_STORAGE =	0x09,
675 	ELS_RNIDA_HOST =	0x0a,
676 	ELS_RNIDA_SUBSYS =	0x0b,	/* storage subsystem (e.g., RAID) */
677 	ELS_RNIDA_ACCESS =	0x0e,	/* access device (e.g. media changer) */
678 	ELS_RNIDA_NAS =		0x11,	/* NAS server */
679 	ELS_RNIDA_BRIDGE =	0x12,	/* bridge */
680 	ELS_RNIDA_VIRT =	0x13,	/* virtualization device */
681 	ELS_RNIDA_MF =		0xff,	/* multifunction device (bits below) */
682 	ELS_RNIDA_MF_HUB =	1UL << 31, 	/* hub */
683 	ELS_RNIDA_MF_SW =	1UL << 30, 	/* switch */
684 	ELS_RNIDA_MF_GW =	1UL << 29,	/* gateway */
685 	ELS_RNIDA_MF_ST =	1UL << 28,	/* storage */
686 	ELS_RNIDA_MF_HOST =	1UL << 27,	/* host */
687 	ELS_RNIDA_MF_SUB =	1UL << 26,	/* storage subsystem */
688 	ELS_RNIDA_MF_ACC =	1UL << 25,	/* storage access dev */
689 	ELS_RNIDA_MF_WDM =	1UL << 24,	/* wavelength division mux */
690 	ELS_RNIDA_MF_NAS =	1UL << 23,	/* NAS server */
691 	ELS_RNIDA_MF_BR =	1UL << 22,	/* bridge */
692 	ELS_RNIDA_MF_VIRT =	1UL << 21,	/* virtualization device */
693 };
694 
695 enum fc_els_rnid_mgmt {
696 	ELS_RNIDM_SNMP =	0,
697 	ELS_RNIDM_TELNET =	1,
698 	ELS_RNIDM_HTTP =	2,
699 	ELS_RNIDM_HTTPS =	3,
700 	ELS_RNIDM_XML =		4,	/* HTTP + XML */
701 };
702 
703 enum fc_els_rnid_ipver {
704 	ELS_RNIDIP_NONE =	0,	/* no IP support or node mgmt. */
705 	ELS_RNIDIP_V4 =		1,	/* IPv4 */
706 	ELS_RNIDIP_V6 =		2,	/* IPv6 */
707 };
708 
709 /*
710  * ELS RPL - Read Port List.
711  */
712 struct fc_els_rpl {
713 	__u8		rpl_cmd;	/* command */
714 	__u8		rpl_resv[5];	/* reserved - must be zero */
715 	__be16		rpl_max_size;	/* maximum response size or zero */
716 	__u8		rpl_resv1;	/* reserved - must be zero */
717 	__u8		rpl_index[3];	/* starting index */
718 };
719 
720 /*
721  * Port number block in RPL response.
722  */
723 struct fc_els_pnb {
724 	__be32		pnb_phys_pn;	/* physical port number */
725 	__u8		pnb_resv;	/* reserved */
726 	__u8		pnb_port_id[3];	/* port ID */
727 	__be64		pnb_wwpn;	/* port name */
728 };
729 
730 /*
731  * RPL LS_ACC response.
732  */
733 struct fc_els_rpl_resp {
734 	__u8		rpl_cmd;	/* ELS_LS_ACC */
735 	__u8		rpl_resv1;	/* reserved - must be zero */
736 	__be16		rpl_plen;	/* payload length */
737 	__u8		rpl_resv2;	/* reserved - must be zero */
738 	__u8		rpl_llen[3];	/* list length */
739 	__u8		rpl_resv3;	/* reserved - must be zero */
740 	__u8		rpl_index[3];	/* starting index */
741 	struct fc_els_pnb rpl_pnb[1];	/* variable number of PNBs */
742 };
743 
744 /*
745  * Link Error Status Block.
746  */
747 struct fc_els_lesb {
748 	__be32		lesb_link_fail;	/* link failure count */
749 	__be32		lesb_sync_loss;	/* loss of synchronization count */
750 	__be32		lesb_sig_loss;	/* loss of signal count */
751 	__be32		lesb_prim_err;	/* primitive sequence error count */
752 	__be32		lesb_inv_word;	/* invalid transmission word count */
753 	__be32		lesb_inv_crc;	/* invalid CRC count */
754 };
755 
756 /*
757  * ELS RPS - Read Port Status Block request.
758  */
759 struct fc_els_rps {
760 	__u8		rps_cmd;	/* command */
761 	__u8		rps_resv[2];	/* reserved - must be zero */
762 	__u8		rps_flag;	/* flag - see below */
763 	__be64		rps_port_spec;	/* port selection */
764 };
765 
766 enum fc_els_rps_flag {
767 	FC_ELS_RPS_DID =	0x00,	/* port identified by D_ID of req. */
768 	FC_ELS_RPS_PPN =	0x01,	/* port_spec is physical port number */
769 	FC_ELS_RPS_WWPN =	0x02,	/* port_spec is port WWN */
770 };
771 
772 /*
773  * ELS RPS LS_ACC response.
774  */
775 struct fc_els_rps_resp {
776 	__u8		rps_cmd;	/* command - LS_ACC */
777 	__u8		rps_resv[2];	/* reserved - must be zero */
778 	__u8		rps_flag;	/* flag - see below */
779 	__u8		rps_resv2[2];	/* reserved */
780 	__be16		rps_status;	/* port status - see below */
781 	struct fc_els_lesb rps_lesb;	/* link error status block */
782 };
783 
784 enum fc_els_rps_resp_flag {
785 	FC_ELS_RPS_LPEV =	0x01,	/* L_port extension valid */
786 };
787 
788 enum fc_els_rps_resp_status {
789 	FC_ELS_RPS_PTP =	1 << 5,	/* point-to-point connection */
790 	FC_ELS_RPS_LOOP =	1 << 4,	/* loop mode */
791 	FC_ELS_RPS_FAB =	1 << 3,	/* fabric present */
792 	FC_ELS_RPS_NO_SIG =	1 << 2,	/* loss of signal */
793 	FC_ELS_RPS_NO_SYNC =	1 << 1,	/* loss of synchronization */
794 	FC_ELS_RPS_RESET =	1 << 0,	/* in link reset protocol */
795 };
796 
797 /*
798  * ELS LIRR - Link Incident Record Registration request.
799  */
800 struct fc_els_lirr {
801 	__u8		lirr_cmd;	/* command */
802 	__u8		lirr_resv[3];	/* reserved - must be zero */
803 	__u8		lirr_func;	/* registration function */
804 	__u8		lirr_fmt;	/* FC-4 type of RLIR requested */
805 	__u8		lirr_resv2[2];	/* reserved - must be zero */
806 };
807 
808 enum fc_els_lirr_func {
809 	ELS_LIRR_SET_COND = 	0x01,	/* set - conditionally receive */
810 	ELS_LIRR_SET_UNCOND = 	0x02,	/* set - unconditionally receive */
811 	ELS_LIRR_CLEAR = 	0xff	/* clear registration */
812 };
813 
814 /*
815  * ELS SRL - Scan Remote Loop request.
816  */
817 struct fc_els_srl {
818 	__u8		srl_cmd;	/* command */
819 	__u8		srl_resv[3];	/* reserved - must be zero */
820 	__u8		srl_flag;	/* flag - see below */
821 	__u8		srl_flag_param[3];	/* flag parameter */
822 };
823 
824 enum fc_els_srl_flag {
825 	FC_ELS_SRL_ALL =	0x00,	/* scan all FL ports */
826 	FC_ELS_SRL_ONE =	0x01,	/* scan specified loop */
827 	FC_ELS_SRL_EN_PER =	0x02,	/* enable periodic scanning (param) */
828 	FC_ELS_SRL_DIS_PER =	0x03,	/* disable periodic scanning */
829 };
830 
831 /*
832  * ELS RLS - Read Link Error Status Block request.
833  */
834 struct fc_els_rls {
835 	__u8		rls_cmd;	/* command */
836 	__u8		rls_resv[4];	/* reserved - must be zero */
837 	__u8		rls_port_id[3];	/* port ID */
838 };
839 
840 /*
841  * ELS RLS LS_ACC Response.
842  */
843 struct fc_els_rls_resp {
844 	__u8		rls_cmd;	/* ELS_LS_ACC */
845 	__u8		rls_resv[3];	/* reserved - must be zero */
846 	struct fc_els_lesb rls_lesb;	/* link error status block */
847 };
848 
849 /*
850  * ELS RLIR - Registered Link Incident Report.
851  * This is followed by the CLIR and the CLID, described below.
852  */
853 struct fc_els_rlir {
854 	__u8		rlir_cmd;	/* command */
855 	__u8		rlir_resv[3];	/* reserved - must be zero */
856 	__u8		rlir_fmt;	/* format (FC4-type if type specific) */
857 	__u8		rlir_clr_len;	/* common link incident record length */
858 	__u8		rlir_cld_len;	/* common link incident desc. length */
859 	__u8		rlir_slr_len;	/* spec. link incident record length */
860 };
861 
862 /*
863  * CLIR - Common Link Incident Record Data. - Sent via RLIR.
864  */
865 struct fc_els_clir {
866 	__be64		clir_wwpn;	/* incident port name */
867 	__be64		clir_wwnn;	/* incident port node name */
868 	__u8		clir_port_type;	/* incident port type */
869 	__u8		clir_port_id[3];	/* incident port ID */
870 
871 	__be64		clir_conn_wwpn;	/* connected port name */
872 	__be64		clir_conn_wwnn;	/* connected node name */
873 	__be64		clir_fab_name;	/* fabric name */
874 	__be32		clir_phys_port;	/* physical port number */
875 	__be32		clir_trans_id;	/* transaction ID */
876 	__u8		clir_resv[3];	/* reserved */
877 	__u8		clir_ts_fmt;	/* time stamp format */
878 	__be64		clir_timestamp;	/* time stamp */
879 };
880 
881 /*
882  * CLIR clir_ts_fmt - time stamp format values.
883  */
884 enum fc_els_clir_ts_fmt {
885 	ELS_CLIR_TS_UNKNOWN = 	0,	/* time stamp field unknown */
886 	ELS_CLIR_TS_SEC_FRAC = 	1,	/* time in seconds and fractions */
887 	ELS_CLIR_TS_CSU =	2,	/* time in clock synch update format */
888 };
889 
890 /*
891  * Common Link Incident Descriptor - sent via RLIR.
892  */
893 struct fc_els_clid {
894 	__u8		clid_iq;	/* incident qualifier flags */
895 	__u8		clid_ic;	/* incident code */
896 	__be16		clid_epai;	/* domain/area of ISL */
897 };
898 
899 /*
900  * CLID incident qualifier flags.
901  */
902 enum fc_els_clid_iq {
903 	ELS_CLID_SWITCH =	0x20,	/* incident port is a switch node */
904 	ELS_CLID_E_PORT =	0x10,	/* incident is an ISL (E) port */
905 	ELS_CLID_SEV_MASK =	0x0c,	/* severity 2-bit field mask */
906 	ELS_CLID_SEV_INFO =	0x00,	/* report is informational */
907 	ELS_CLID_SEV_INOP =	0x08,	/* link not operational */
908 	ELS_CLID_SEV_DEG =	0x04,	/* link degraded but operational */
909 	ELS_CLID_LASER =	0x02,	/* subassembly is a laser */
910 	ELS_CLID_FRU =		0x01,	/* format can identify a FRU */
911 };
912 
913 /*
914  * CLID incident code.
915  */
916 enum fc_els_clid_ic {
917 	ELS_CLID_IC_IMPL =	1,	/* implicit incident */
918 	ELS_CLID_IC_BER =	2,	/* bit-error-rate threshold exceeded */
919 	ELS_CLID_IC_LOS =	3,	/* loss of synch or signal */
920 	ELS_CLID_IC_NOS =	4,	/* non-operational primitive sequence */
921 	ELS_CLID_IC_PST =	5,	/* primitive sequence timeout */
922 	ELS_CLID_IC_INVAL =	6,	/* invalid primitive sequence */
923 	ELS_CLID_IC_LOOP_TO =	7,	/* loop initialization time out */
924 	ELS_CLID_IC_LIP =	8,	/* receiving LIP */
925 };
926 
927 /*
928  * Link Integrity event types
929  */
930 enum fc_fpin_li_event_types {
931 	FPIN_LI_UNKNOWN =		0x0,
932 	FPIN_LI_LINK_FAILURE =		0x1,
933 	FPIN_LI_LOSS_OF_SYNC =		0x2,
934 	FPIN_LI_LOSS_OF_SIG =		0x3,
935 	FPIN_LI_PRIM_SEQ_ERR =		0x4,
936 	FPIN_LI_INVALID_TX_WD =		0x5,
937 	FPIN_LI_INVALID_CRC =		0x6,
938 	FPIN_LI_DEVICE_SPEC =		0xF,
939 };
940 
941 /*
942  * Initializer useful for decoding table.
943  * Please keep this in sync with the above definitions.
944  */
945 #define FC_FPIN_LI_EVT_TYPES_INIT {					\
946 	{ FPIN_LI_UNKNOWN,		"Unknown" },			\
947 	{ FPIN_LI_LINK_FAILURE,		"Link Failure" },		\
948 	{ FPIN_LI_LOSS_OF_SYNC,		"Loss of Synchronization" },	\
949 	{ FPIN_LI_LOSS_OF_SIG,		"Loss of Signal" },		\
950 	{ FPIN_LI_PRIM_SEQ_ERR,		"Primitive Sequence Protocol Error" }, \
951 	{ FPIN_LI_INVALID_TX_WD,	"Invalid Transmission Word" },	\
952 	{ FPIN_LI_INVALID_CRC,		"Invalid CRC" },		\
953 	{ FPIN_LI_DEVICE_SPEC,		"Device Specific" },		\
954 }
955 
956 /*
957  * Delivery event types
958  */
959 enum fc_fpin_deli_event_types {
960 	FPIN_DELI_UNKNOWN =		0x0,
961 	FPIN_DELI_TIMEOUT =		0x1,
962 	FPIN_DELI_UNABLE_TO_ROUTE =	0x2,
963 	FPIN_DELI_DEVICE_SPEC =		0xF,
964 };
965 
966 /*
967  * Initializer useful for decoding table.
968  * Please keep this in sync with the above definitions.
969  */
970 #define FC_FPIN_DELI_EVT_TYPES_INIT {					\
971 	{ FPIN_DELI_UNKNOWN,		"Unknown" },			\
972 	{ FPIN_DELI_TIMEOUT,		"Timeout" },			\
973 	{ FPIN_DELI_UNABLE_TO_ROUTE,	"Unable to Route" },		\
974 	{ FPIN_DELI_DEVICE_SPEC,	"Device Specific" },		\
975 }
976 
977 /*
978  * Congestion event types
979  */
980 enum fc_fpin_congn_event_types {
981 	FPIN_CONGN_CLEAR =		0x0,
982 	FPIN_CONGN_LOST_CREDIT =	0x1,
983 	FPIN_CONGN_CREDIT_STALL =	0x2,
984 	FPIN_CONGN_OVERSUBSCRIPTION =	0x3,
985 	FPIN_CONGN_DEVICE_SPEC =	0xF,
986 };
987 
988 /*
989  * Initializer useful for decoding table.
990  * Please keep this in sync with the above definitions.
991  */
992 #define FC_FPIN_CONGN_EVT_TYPES_INIT {					\
993 	{ FPIN_CONGN_CLEAR,		"Clear" },			\
994 	{ FPIN_CONGN_LOST_CREDIT,	"Lost Credit" },		\
995 	{ FPIN_CONGN_CREDIT_STALL,	"Credit Stall" },		\
996 	{ FPIN_CONGN_OVERSUBSCRIPTION,	"Oversubscription" },		\
997 	{ FPIN_CONGN_DEVICE_SPEC,	"Device Specific" },		\
998 }
999 
1000 enum fc_fpin_congn_severity_types {
1001 	FPIN_CONGN_SEVERITY_WARNING =	0xF1,
1002 	FPIN_CONGN_SEVERITY_ERROR =	0xF7,
1003 };
1004 
1005 /*
1006  * Link Integrity Notification Descriptor
1007  */
1008 struct fc_fn_li_desc {
1009 	__be32		desc_tag;	/* Descriptor Tag (0x00020001) */
1010 	__be32		desc_len;	/* Length of Descriptor (in bytes).
1011 					 * Size of descriptor excluding
1012 					 * desc_tag and desc_len fields.
1013 					 */
1014 	__be64		detecting_wwpn;	/* Port Name that detected event */
1015 	__be64		attached_wwpn;	/* Port Name of device attached to
1016 					 * detecting Port Name
1017 					 */
1018 	__be16		event_type;	/* see enum fc_fpin_li_event_types */
1019 	__be16		event_modifier;	/* Implementation specific value
1020 					 * describing the event type
1021 					 */
1022 	__be32		event_threshold;/* duration in ms of the link
1023 					 * integrity detection cycle
1024 					 */
1025 	__be32		event_count;	/* minimum number of event
1026 					 * occurrences during the event
1027 					 * threshold to caause the LI event
1028 					 */
1029 	__be32		pname_count;	/* number of portname_list elements */
1030 	__be64		pname_list[];	/* list of N_Port_Names accessible
1031 					 * through the attached port
1032 					 */
1033 };
1034 
1035 /*
1036  * Delivery Notification Descriptor
1037  */
1038 struct fc_fn_deli_desc {
1039 	__be32		desc_tag;	/* Descriptor Tag (0x00020002) */
1040 	__be32		desc_len;	/* Length of Descriptor (in bytes).
1041 					 * Size of descriptor excluding
1042 					 * desc_tag and desc_len fields.
1043 					 */
1044 	__be64		detecting_wwpn;	/* Port Name that detected event */
1045 	__be64		attached_wwpn;	/* Port Name of device attached to
1046 					 * detecting Port Name
1047 					 */
1048 	__be32		deli_reason_code;/* see enum fc_fpin_deli_event_types */
1049 };
1050 
1051 /*
1052  * Peer Congestion Notification Descriptor
1053  */
1054 struct fc_fn_peer_congn_desc {
1055 	__be32		desc_tag;	/* Descriptor Tag (0x00020003) */
1056 	__be32		desc_len;	/* Length of Descriptor (in bytes).
1057 					 * Size of descriptor excluding
1058 					 * desc_tag and desc_len fields.
1059 					 */
1060 	__be64		detecting_wwpn;	/* Port Name that detected event */
1061 	__be64		attached_wwpn;	/* Port Name of device attached to
1062 					 * detecting Port Name
1063 					 */
1064 	__be16		event_type;	/* see enum fc_fpin_congn_event_types */
1065 	__be16		event_modifier;	/* Implementation specific value
1066 					 * describing the event type
1067 					 */
1068 	__be32		event_period;	/* duration (ms) of the detected
1069 					 * congestion event
1070 					 */
1071 	__be32		pname_count;	/* number of portname_list elements */
1072 	__be64		pname_list[];	/* list of N_Port_Names accessible
1073 					 * through the attached port
1074 					 */
1075 };
1076 
1077 /*
1078  * Congestion Notification Descriptor
1079  */
1080 struct fc_fn_congn_desc {
1081 	__be32		desc_tag;	/* Descriptor Tag (0x00020004) */
1082 	__be32		desc_len;	/* Length of Descriptor (in bytes).
1083 					 * Size of descriptor excluding
1084 					 * desc_tag and desc_len fields.
1085 					 */
1086 	__be16		event_type;	/* see enum fc_fpin_congn_event_types */
1087 	__be16		event_modifier;	/* Implementation specific value
1088 					 * describing the event type
1089 					 */
1090 	__be32		event_period;	/* duration (ms) of the detected
1091 					 * congestion event
1092 					 */
1093 	__u8		severity;	/* command */
1094 	__u8		resv[3];	/* reserved - must be zero */
1095 };
1096 
1097 /*
1098  * ELS_FPIN - Fabric Performance Impact Notification
1099  */
1100 struct fc_els_fpin {
1101 	__u8		fpin_cmd;	/* command (0x16) */
1102 	__u8		fpin_zero[3];	/* specified as zero - part of cmd */
1103 	__be32		desc_len;	/* Length of Descriptor List (in bytes).
1104 					 * Size of ELS excluding fpin_cmd,
1105 					 * fpin_zero and desc_len fields.
1106 					 */
1107 	struct fc_tlv_desc	fpin_desc[];	/* Descriptor list */
1108 };
1109 
1110 /* Diagnostic Function Descriptor - FPIN Registration */
1111 struct fc_df_desc_fpin_reg {
1112 	__be32		desc_tag;	/* FPIN Registration (0x00030001) */
1113 	__be32		desc_len;	/* Length of Descriptor (in bytes).
1114 					 * Size of descriptor excluding
1115 					 * desc_tag and desc_len fields.
1116 					 */
1117 	__be32		count;		/* Number of desc_tags elements */
1118 	__be32		desc_tags[];	/* Array of Descriptor Tags.
1119 					 * Each tag indicates a function
1120 					 * supported by the N_Port (request)
1121 					 * or by the  N_Port and Fabric
1122 					 * Controller (reply; may be a subset
1123 					 * of the request).
1124 					 * See ELS_FN_DTAG_xxx for tag values.
1125 					 */
1126 };
1127 
1128 /*
1129  * ELS_RDF - Register Diagnostic Functions
1130  */
1131 struct fc_els_rdf {
1132 	__u8		fpin_cmd;	/* command (0x19) */
1133 	__u8		fpin_zero[3];	/* specified as zero - part of cmd */
1134 	__be32		desc_len;	/* Length of Descriptor List (in bytes).
1135 					 * Size of ELS excluding fpin_cmd,
1136 					 * fpin_zero and desc_len fields.
1137 					 */
1138 	struct fc_tlv_desc	desc[];	/* Descriptor list */
1139 };
1140 
1141 /*
1142  * ELS RDF LS_ACC Response.
1143  */
1144 struct fc_els_rdf_resp {
1145 	struct fc_els_ls_acc	acc_hdr;
1146 	__be32			desc_list_len;	/* Length of response (in
1147 						 * bytes). Excludes acc_hdr
1148 						 * and desc_list_len fields.
1149 						 */
1150 	struct fc_els_lsri_desc	lsri;
1151 	struct fc_tlv_desc	desc[];	/* Supported Descriptor list */
1152 };
1153 
1154 
1155 /*
1156  * Diagnostic Capability Descriptors for EDC ELS
1157  */
1158 
1159 /*
1160  * Diagnostic: Link Fault Capability Descriptor
1161  */
1162 struct fc_diag_lnkflt_desc {
1163 	__be32		desc_tag;	/* Descriptor Tag (0x0001000D) */
1164 	__be32		desc_len;	/* Length of Descriptor (in bytes).
1165 					 * Size of descriptor excluding
1166 					 * desc_tag and desc_len fields.
1167 					 * 12 bytes
1168 					 */
1169 	__be32		degrade_activate_threshold;
1170 	__be32		degrade_deactivate_threshold;
1171 	__be32		fec_degrade_interval;
1172 };
1173 
1174 enum fc_edc_cg_signal_cap_types {
1175 	/* Note: Capability: bits 31:4 Rsvd; bits 3:0 are capabilities */
1176 	EDC_CG_SIG_NOTSUPPORTED =	0x00, /* neither supported */
1177 	EDC_CG_SIG_WARN_ONLY =		0x01,
1178 	EDC_CG_SIG_WARN_ALARM =		0x02, /* both supported */
1179 };
1180 
1181 /*
1182  * Initializer useful for decoding table.
1183  * Please keep this in sync with the above definitions.
1184  */
1185 #define FC_EDC_CG_SIGNAL_CAP_TYPES_INIT {				\
1186 	{ EDC_CG_SIG_NOTSUPPORTED,	"Signaling Not Supported" },	\
1187 	{ EDC_CG_SIG_WARN_ONLY,		"Warning Signal" },		\
1188 	{ EDC_CG_SIG_WARN_ALARM,	"Warning and Alarm Signals" },	\
1189 }
1190 
1191 enum fc_diag_cg_sig_freq_types {
1192 	EDC_CG_SIGFREQ_CNT_MIN =	1,	/* Min Frequency Count */
1193 	EDC_CG_SIGFREQ_CNT_MAX =	999,	/* Max Frequency Count */
1194 
1195 	EDC_CG_SIGFREQ_SEC =		0x1,	/* Units: seconds */
1196 	EDC_CG_SIGFREQ_MSEC =		0x2,	/* Units: milliseconds */
1197 };
1198 
1199 struct fc_diag_cg_sig_freq {
1200 	__be16		count;		/* Time between signals
1201 					 * note: upper 6 bits rsvd
1202 					 */
1203 	__be16		units;		/* Time unit for count
1204 					 * note: upper 12 bits rsvd
1205 					 */
1206 };
1207 
1208 /*
1209  * Diagnostic: Congestion Signaling Capability Descriptor
1210  */
1211 struct fc_diag_cg_sig_desc {
1212 	__be32		desc_tag;	/* Descriptor Tag (0x0001000F) */
1213 	__be32		desc_len;	/* Length of Descriptor (in bytes).
1214 					 * Size of descriptor excluding
1215 					 * desc_tag and desc_len fields.
1216 					 * 16 bytes
1217 					 */
1218 	__be32				xmt_signal_capability;
1219 	struct fc_diag_cg_sig_freq	xmt_signal_frequency;
1220 	__be32				rcv_signal_capability;
1221 	struct fc_diag_cg_sig_freq	rcv_signal_frequency;
1222 };
1223 
1224 /*
1225  * ELS_EDC - Exchange Diagnostic Capabilities
1226  */
1227 struct fc_els_edc {
1228 	__u8		edc_cmd;	/* command (0x17) */
1229 	__u8		edc_zero[3];	/* specified as zero - part of cmd */
1230 	__be32		desc_len;	/* Length of Descriptor List (in bytes).
1231 					 * Size of ELS excluding edc_cmd,
1232 					 * edc_zero and desc_len fields.
1233 					 */
1234 	struct fc_tlv_desc	desc[];
1235 					/* Diagnostic Descriptor list */
1236 };
1237 
1238 /*
1239  * ELS EDC LS_ACC Response.
1240  */
1241 struct fc_els_edc_resp {
1242 	struct fc_els_ls_acc	acc_hdr;
1243 	__be32			desc_list_len;	/* Length of response (in
1244 						 * bytes). Excludes acc_hdr
1245 						 * and desc_list_len fields.
1246 						 */
1247 	struct fc_els_lsri_desc	lsri;
1248 	struct fc_tlv_desc	desc[];
1249 				    /* Supported Diagnostic Descriptor list */
1250 };
1251 
1252 
1253 #endif /* _FC_ELS_H_ */
1254