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      1 /*
      2  * Copyright(c) 2007 Intel Corporation. All rights reserved.
      3  *
      4  * This program is free software; you can redistribute it and/or modify it
      5  * under the terms and conditions of the GNU General Public License,
      6  * version 2, as published by the Free Software Foundation.
      7  *
      8  * This program is distributed in the hope it will be useful, but WITHOUT
      9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
     11  * more details.
     12  *
     13  * You should have received a copy of the GNU General Public License along with
     14  * this program; if not, write to the Free Software Foundation, Inc.,
     15  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
     16  *
     17  * Maintained at www.Open-FCoE.org
     18  */
     19 
     20 #ifndef _FC_ELS_H_
     21 #define	_FC_ELS_H_
     22 
     23 #include <linux/types.h>
     24 
     25 /*
     26  * Fibre Channel Switch - Enhanced Link Services definitions.
     27  * From T11 FC-LS Rev 1.2 June 7, 2005.
     28  */
     29 
     30 /*
     31  * ELS Command codes - byte 0 of the frame payload
     32  */
     33 enum fc_els_cmd {
     34 	ELS_LS_RJT =	0x01,	/* ESL reject */
     35 	ELS_LS_ACC =	0x02,	/* ESL Accept */
     36 	ELS_PLOGI =	0x03,	/* N_Port login */
     37 	ELS_FLOGI =	0x04,	/* F_Port login */
     38 	ELS_LOGO =	0x05,	/* Logout */
     39 	ELS_ABTX =	0x06,	/* Abort exchange - obsolete */
     40 	ELS_RCS =	0x07,	/* read connection status */
     41 	ELS_RES =	0x08,	/* read exchange status block */
     42 	ELS_RSS =	0x09,	/* read sequence status block */
     43 	ELS_RSI =	0x0a,	/* read sequence initiative */
     44 	ELS_ESTS =	0x0b,	/* establish streaming */
     45 	ELS_ESTC =	0x0c,	/* estimate credit */
     46 	ELS_ADVC =	0x0d,	/* advise credit */
     47 	ELS_RTV =	0x0e,	/* read timeout value */
     48 	ELS_RLS =	0x0f,	/* read link error status block */
     49 	ELS_ECHO =	0x10,	/* echo */
     50 	ELS_TEST =	0x11,	/* test */
     51 	ELS_RRQ =	0x12,	/* reinstate recovery qualifier */
     52 	ELS_REC =	0x13,	/* read exchange concise */
     53 	ELS_SRR =	0x14,	/* sequence retransmission request */
     54 	ELS_PRLI =	0x20,	/* process login */
     55 	ELS_PRLO =	0x21,	/* process logout */
     56 	ELS_SCN =	0x22,	/* state change notification */
     57 	ELS_TPLS =	0x23,	/* test process login state */
     58 	ELS_TPRLO =	0x24,	/* third party process logout */
     59 	ELS_LCLM =	0x25,	/* login control list mgmt (obs) */
     60 	ELS_GAID =	0x30,	/* get alias_ID */
     61 	ELS_FACT =	0x31,	/* fabric activate alias_id */
     62 	ELS_FDACDT =	0x32,	/* fabric deactivate alias_id */
     63 	ELS_NACT =	0x33,	/* N-port activate alias_id */
     64 	ELS_NDACT =	0x34,	/* N-port deactivate alias_id */
     65 	ELS_QOSR =	0x40,	/* quality of service request */
     66 	ELS_RVCS =	0x41,	/* read virtual circuit status */
     67 	ELS_PDISC =	0x50,	/* discover N_port service params */
     68 	ELS_FDISC =	0x51,	/* discover F_port service params */
     69 	ELS_ADISC =	0x52,	/* discover address */
     70 	ELS_RNC =	0x53,	/* report node cap (obs) */
     71 	ELS_FARP_REQ =	0x54,	/* FC ARP request */
     72 	ELS_FARP_REPL =	0x55,	/* FC ARP reply */
     73 	ELS_RPS =	0x56,	/* read port status block */
     74 	ELS_RPL =	0x57,	/* read port list */
     75 	ELS_RPBC =	0x58,	/* read port buffer condition */
     76 	ELS_FAN =	0x60,	/* fabric address notification */
     77 	ELS_RSCN =	0x61,	/* registered state change notification */
     78 	ELS_SCR =	0x62,	/* state change registration */
     79 	ELS_RNFT =	0x63,	/* report node FC-4 types */
     80 	ELS_CSR =	0x68,	/* clock synch. request */
     81 	ELS_CSU =	0x69,	/* clock synch. update */
     82 	ELS_LINIT =	0x70,	/* loop initialize */
     83 	ELS_LSTS =	0x72,	/* loop status */
     84 	ELS_RNID =	0x78,	/* request node ID data */
     85 	ELS_RLIR =	0x79,	/* registered link incident report */
     86 	ELS_LIRR =	0x7a,	/* link incident record registration */
     87 	ELS_SRL =	0x7b,	/* scan remote loop */
     88 	ELS_SBRP =	0x7c,	/* set bit-error reporting params */
     89 	ELS_RPSC =	0x7d,	/* report speed capabilities */
     90 	ELS_QSA =	0x7e,	/* query security attributes */
     91 	ELS_EVFP =	0x7f,	/* exchange virt. fabrics params */
     92 	ELS_LKA =	0x80,	/* link keep-alive */
     93 	ELS_AUTH_ELS =	0x90,	/* authentication ELS */
     94 };
     95 
     96 /*
     97  * Initializer useful for decoding table.
     98  * Please keep this in sync with the above definitions.
     99  */
    100 #define	FC_ELS_CMDS_INIT {			\
    101 	[ELS_LS_RJT] =	"LS_RJT",		\
    102 	[ELS_LS_ACC] =	"LS_ACC",		\
    103 	[ELS_PLOGI] =	"PLOGI",		\
    104 	[ELS_FLOGI] =	"FLOGI",		\
    105 	[ELS_LOGO] =	"LOGO",			\
    106 	[ELS_ABTX] =	"ABTX",			\
    107 	[ELS_RCS] =	"RCS",			\
    108 	[ELS_RES] =	"RES",			\
    109 	[ELS_RSS] =	"RSS",			\
    110 	[ELS_RSI] =	"RSI",			\
    111 	[ELS_ESTS] =	"ESTS",			\
    112 	[ELS_ESTC] =	"ESTC",			\
    113 	[ELS_ADVC] =	"ADVC",			\
    114 	[ELS_RTV] =	"RTV",			\
    115 	[ELS_RLS] =	"RLS",			\
    116 	[ELS_ECHO] =	"ECHO",			\
    117 	[ELS_TEST] =	"TEST",			\
    118 	[ELS_RRQ] =	"RRQ",			\
    119 	[ELS_REC] =	"REC",			\
    120 	[ELS_SRR] =	"SRR",			\
    121 	[ELS_PRLI] =	"PRLI",			\
    122 	[ELS_PRLO] =	"PRLO",			\
    123 	[ELS_SCN] =	"SCN",			\
    124 	[ELS_TPLS] =	"TPLS",			\
    125 	[ELS_TPRLO] =	"TPRLO",		\
    126 	[ELS_LCLM] =	"LCLM",			\
    127 	[ELS_GAID] =	"GAID",			\
    128 	[ELS_FACT] =	"FACT",			\
    129 	[ELS_FDACDT] =	"FDACDT",		\
    130 	[ELS_NACT] =	"NACT",			\
    131 	[ELS_NDACT] =	"NDACT",		\
    132 	[ELS_QOSR] =	"QOSR",			\
    133 	[ELS_RVCS] =	"RVCS",			\
    134 	[ELS_PDISC] =	"PDISC",		\
    135 	[ELS_FDISC] =	"FDISC",		\
    136 	[ELS_ADISC] =	"ADISC",		\
    137 	[ELS_RNC] =	"RNC",			\
    138 	[ELS_FARP_REQ] = "FARP_REQ",		\
    139 	[ELS_FARP_REPL] =  "FARP_REPL",		\
    140 	[ELS_RPS] =	"RPS",			\
    141 	[ELS_RPL] =	"RPL",			\
    142 	[ELS_RPBC] =	"RPBC",			\
    143 	[ELS_FAN] =	"FAN",			\
    144 	[ELS_RSCN] =	"RSCN",			\
    145 	[ELS_SCR] =	"SCR",			\
    146 	[ELS_RNFT] =	"RNFT",			\
    147 	[ELS_CSR] =	"CSR",			\
    148 	[ELS_CSU] =	"CSU",			\
    149 	[ELS_LINIT] =	"LINIT",		\
    150 	[ELS_LSTS] =	"LSTS",			\
    151 	[ELS_RNID] =	"RNID",			\
    152 	[ELS_RLIR] =	"RLIR",			\
    153 	[ELS_LIRR] =	"LIRR",			\
    154 	[ELS_SRL] =	"SRL",			\
    155 	[ELS_SBRP] =	"SBRP",			\
    156 	[ELS_RPSC] =	"RPSC",			\
    157 	[ELS_QSA] =	"QSA",			\
    158 	[ELS_EVFP] =	"EVFP",			\
    159 	[ELS_LKA] =	"LKA",			\
    160 	[ELS_AUTH_ELS] = "AUTH_ELS",		\
    161 }
    162 
    163 /*
    164  * LS_ACC payload.
    165  */
    166 struct fc_els_ls_acc {
    167 	__u8          la_cmd;		/* command code ELS_LS_ACC */
    168 	__u8          la_resv[3];	/* reserved */
    169 };
    170 
    171 /*
    172  * ELS reject payload.
    173  */
    174 struct fc_els_ls_rjt {
    175 	__u8	er_cmd;		/* command code ELS_LS_RJT */
    176 	__u8	er_resv[4];	/* reserved must be zero */
    177 	__u8	er_reason;	/* reason (enum fc_els_rjt_reason below) */
    178 	__u8	er_explan;	/* explanation (enum fc_els_rjt_explan below) */
    179 	__u8	er_vendor;	/* vendor specific code */
    180 };
    181 
    182 /*
    183  * ELS reject reason codes (er_reason).
    184  */
    185 enum fc_els_rjt_reason {
    186 	ELS_RJT_NONE =		0,	/* no reject - not to be sent */
    187 	ELS_RJT_INVAL =		0x01,	/* invalid ELS command code */
    188 	ELS_RJT_LOGIC =		0x03,	/* logical error */
    189 	ELS_RJT_BUSY =		0x05,	/* logical busy */
    190 	ELS_RJT_PROT =		0x07,	/* protocol error */
    191 	ELS_RJT_UNAB =		0x09,	/* unable to perform command request */
    192 	ELS_RJT_UNSUP =		0x0b,	/* command not supported */
    193 	ELS_RJT_INPROG =	0x0e,	/* command already in progress */
    194 	ELS_RJT_FIP =		0x20,	/* FIP error */
    195 	ELS_RJT_VENDOR =	0xff,	/* vendor specific error */
    196 };
    197 
    198 
    199 /*
    200  * reason code explanation (er_explan).
    201  */
    202 enum fc_els_rjt_explan {
    203 	ELS_EXPL_NONE =		0x00,	/* No additional explanation */
    204 	ELS_EXPL_SPP_OPT_ERR =	0x01,	/* service parameter error - options */
    205 	ELS_EXPL_SPP_ICTL_ERR =	0x03,	/* service parm error - initiator ctl */
    206 	ELS_EXPL_AH =		0x11,	/* invalid association header */
    207 	ELS_EXPL_AH_REQ =	0x13,	/* association_header required */
    208 	ELS_EXPL_SID =		0x15,	/* invalid originator S_ID */
    209 	ELS_EXPL_OXID_RXID =	0x17,	/* invalid OX_ID-RX_ID combination */
    210 	ELS_EXPL_INPROG =	0x19,	/* Request already in progress */
    211 	ELS_EXPL_PLOGI_REQD =	0x1e,	/* N_Port login required */
    212 	ELS_EXPL_INSUF_RES =	0x29,	/* insufficient resources */
    213 	ELS_EXPL_UNAB_DATA =	0x2a,	/* unable to supply requested data */
    214 	ELS_EXPL_UNSUPR =	0x2c,	/* Request not supported */
    215 	ELS_EXPL_INV_LEN =	0x2d,	/* Invalid payload length */
    216 	ELS_EXPL_NOT_NEIGHBOR = 0x62,	/* VN2VN_Port not in neighbor set */
    217 	/* TBD - above definitions incomplete */
    218 };
    219 
    220 /*
    221  * Common service parameters (N ports).
    222  */
    223 struct fc_els_csp {
    224 	__u8		sp_hi_ver;	/* highest version supported (obs.) */
    225 	__u8		sp_lo_ver;	/* highest version supported (obs.) */
    226 	__be16		sp_bb_cred;	/* buffer-to-buffer credits */
    227 	__be16		sp_features;	/* common feature flags */
    228 	__be16		sp_bb_data;	/* b-b state number and data field sz */
    229 	union {
    230 		struct {
    231 			__be16	_sp_tot_seq; /* total concurrent sequences */
    232 			__be16	_sp_rel_off; /* rel. offset by info cat */
    233 		} sp_plogi;
    234 		struct {
    235 			__be32	_sp_r_a_tov; /* resource alloc. timeout msec */
    236 		} sp_flogi_acc;
    237 	} sp_u;
    238 	__be32		sp_e_d_tov;	/* error detect timeout value */
    239 };
    240 #define	sp_tot_seq	sp_u.sp_plogi._sp_tot_seq
    241 #define	sp_rel_off	sp_u.sp_plogi._sp_rel_off
    242 #define	sp_r_a_tov	sp_u.sp_flogi_acc._sp_r_a_tov
    243 
    244 #define	FC_SP_BB_DATA_MASK 0xfff /* mask for data field size in sp_bb_data */
    245 
    246 /*
    247  * Minimum and maximum values for max data field size in service parameters.
    248  */
    249 #define	FC_SP_MIN_MAX_PAYLOAD	FC_MIN_MAX_PAYLOAD
    250 #define	FC_SP_MAX_MAX_PAYLOAD	FC_MAX_PAYLOAD
    251 
    252 /*
    253  * sp_features
    254  */
    255 #define	FC_SP_FT_NPIV	0x8000	/* multiple N_Port_ID support (FLOGI) */
    256 #define	FC_SP_FT_CIRO	0x8000	/* continuously increasing rel off (PLOGI) */
    257 #define	FC_SP_FT_CLAD	0x8000	/* clean address (in FLOGI LS_ACC) */
    258 #define	FC_SP_FT_RAND	0x4000	/* random relative offset */
    259 #define	FC_SP_FT_VAL	0x2000	/* valid vendor version level */
    260 #define	FC_SP_FT_NPIV_ACC	0x2000	/* NPIV assignment (FLOGI LS_ACC) */
    261 #define	FC_SP_FT_FPORT	0x1000	/* F port (1) vs. N port (0) */
    262 #define	FC_SP_FT_ABB	0x0800	/* alternate BB_credit management */
    263 #define	FC_SP_FT_EDTR	0x0400	/* E_D_TOV Resolution is nanoseconds */
    264 #define	FC_SP_FT_MCAST	0x0200	/* multicast */
    265 #define	FC_SP_FT_BCAST	0x0100	/* broadcast */
    266 #define	FC_SP_FT_HUNT	0x0080	/* hunt group */
    267 #define	FC_SP_FT_SIMP	0x0040	/* dedicated simplex */
    268 #define	FC_SP_FT_SEC	0x0020	/* reserved for security */
    269 #define	FC_SP_FT_CSYN	0x0010	/* clock synch. supported */
    270 #define	FC_SP_FT_RTTOV	0x0008	/* R_T_TOV value 100 uS, else 100 mS */
    271 #define	FC_SP_FT_HALF	0x0004	/* dynamic half duplex */
    272 #define	FC_SP_FT_SEQC	0x0002	/* SEQ_CNT */
    273 #define	FC_SP_FT_PAYL	0x0001	/* FLOGI payload length 256, else 116 */
    274 
    275 /*
    276  * Class-specific service parameters.
    277  */
    278 struct fc_els_cssp {
    279 	__be16		cp_class;	/* class flags */
    280 	__be16		cp_init;	/* initiator flags */
    281 	__be16		cp_recip;	/* recipient flags */
    282 	__be16		cp_rdfs;	/* receive data field size */
    283 	__be16		cp_con_seq;	/* concurrent sequences */
    284 	__be16		cp_ee_cred;	/* N-port end-to-end credit */
    285 	__u8		cp_resv1;	/* reserved */
    286 	__u8		cp_open_seq;	/* open sequences per exchange */
    287 	__u8		_cp_resv2[2];	/* reserved */
    288 };
    289 
    290 /*
    291  * cp_class flags.
    292  */
    293 #define	FC_CPC_VALID	0x8000		/* class valid */
    294 #define	FC_CPC_IMIX	0x4000		/* intermix mode */
    295 #define	FC_CPC_SEQ	0x0800		/* sequential delivery */
    296 #define	FC_CPC_CAMP	0x0200		/* camp-on */
    297 #define	FC_CPC_PRI	0x0080		/* priority */
    298 
    299 /*
    300  * cp_init flags.
    301  * (TBD: not all flags defined here).
    302  */
    303 #define	FC_CPI_CSYN	0x0010		/* clock synch. capable */
    304 
    305 /*
    306  * cp_recip flags.
    307  */
    308 #define	FC_CPR_CSYN	0x0008		/* clock synch. capable */
    309 
    310 /*
    311  * NFC_ELS_FLOGI: Fabric login request.
    312  * NFC_ELS_PLOGI: Port login request (same format).
    313  */
    314 struct fc_els_flogi {
    315 	__u8		fl_cmd;		/* command */
    316 	__u8		_fl_resvd[3];	/* must be zero */
    317 	struct fc_els_csp fl_csp;	/* common service parameters */
    318 	__be64		fl_wwpn;	/* port name */
    319 	__be64		fl_wwnn;	/* node name */
    320 	struct fc_els_cssp fl_cssp[4];	/* class 1-4 service parameters */
    321 	__u8		fl_vend[16];	/* vendor version level */
    322 } __attribute__((__packed__));
    323 
    324 /*
    325  * Process login service parameter page.
    326  */
    327 struct fc_els_spp {
    328 	__u8		spp_type;	/* type code or common service params */
    329 	__u8		spp_type_ext;	/* type code extension */
    330 	__u8		spp_flags;
    331 	__u8		_spp_resvd;
    332 	__be32		spp_orig_pa;	/* originator process associator */
    333 	__be32		spp_resp_pa;	/* responder process associator */
    334 	__be32		spp_params;	/* service parameters */
    335 };
    336 
    337 /*
    338  * spp_flags.
    339  */
    340 #define	FC_SPP_OPA_VAL	    0x80	/* originator proc. assoc. valid */
    341 #define	FC_SPP_RPA_VAL	    0x40	/* responder proc. assoc. valid */
    342 #define	FC_SPP_EST_IMG_PAIR 0x20	/* establish image pair */
    343 #define	FC_SPP_RESP_MASK    0x0f	/* mask for response code (below) */
    344 
    345 /*
    346  * SPP response code in spp_flags - lower 4 bits.
    347  */
    348 enum fc_els_spp_resp {
    349 	FC_SPP_RESP_ACK	=	1,	/* request executed */
    350 	FC_SPP_RESP_RES =	2,	/* unable due to lack of resources */
    351 	FC_SPP_RESP_INIT =	3,	/* initialization not complete */
    352 	FC_SPP_RESP_NO_PA = 	4,	/* unknown process associator */
    353 	FC_SPP_RESP_CONF = 	5,	/* configuration precludes image pair */
    354 	FC_SPP_RESP_COND = 	6,	/* request completed conditionally */
    355 	FC_SPP_RESP_MULT = 	7,	/* unable to handle multiple SPPs */
    356 	FC_SPP_RESP_INVL = 	8,	/* SPP is invalid */
    357 };
    358 
    359 /*
    360  * ELS_RRQ - Reinstate Recovery Qualifier
    361  */
    362 struct fc_els_rrq {
    363 	__u8		rrq_cmd;	/* command (0x12) */
    364 	__u8		rrq_zero[3];	/* specified as zero - part of cmd */
    365 	__u8		rrq_resvd;	/* reserved */
    366 	__u8		rrq_s_id[3];	/* originator FID */
    367 	__be16		rrq_ox_id;	/* originator exchange ID */
    368 	__be16		rrq_rx_id;	/* responders exchange ID */
    369 };
    370 
    371 /*
    372  * ELS_REC - Read exchange concise.
    373  */
    374 struct fc_els_rec {
    375 	__u8		rec_cmd;	/* command (0x13) */
    376 	__u8		rec_zero[3];	/* specified as zero - part of cmd */
    377 	__u8		rec_resvd;	/* reserved */
    378 	__u8		rec_s_id[3];	/* originator FID */
    379 	__be16		rec_ox_id;	/* originator exchange ID */
    380 	__be16		rec_rx_id;	/* responders exchange ID */
    381 };
    382 
    383 /*
    384  * ELS_REC LS_ACC payload.
    385  */
    386 struct fc_els_rec_acc {
    387 	__u8		reca_cmd;	/* accept (0x02) */
    388 	__u8		reca_zero[3];	/* specified as zero - part of cmd */
    389 	__be16		reca_ox_id;	/* originator exchange ID */
    390 	__be16		reca_rx_id;	/* responders exchange ID */
    391 	__u8		reca_resvd1;	/* reserved */
    392 	__u8		reca_ofid[3];	/* originator FID */
    393 	__u8		reca_resvd2;	/* reserved */
    394 	__u8		reca_rfid[3];	/* responder FID */
    395 	__be32		reca_fc4value;	/* FC4 value */
    396 	__be32		reca_e_stat;	/* ESB (exchange status block) status */
    397 };
    398 
    399 /*
    400  * ELS_PRLI - Process login request and response.
    401  */
    402 struct fc_els_prli {
    403 	__u8		prli_cmd;	/* command */
    404 	__u8		prli_spp_len;	/* length of each serv. parm. page */
    405 	__be16		prli_len;	/* length of entire payload */
    406 	/* service parameter pages follow */
    407 };
    408 
    409 /*
    410  * ELS_PRLO - Process logout request and response.
    411  */
    412 struct fc_els_prlo {
    413 	__u8            prlo_cmd;       /* command */
    414 	__u8            prlo_obs;       /* obsolete, but shall be set to 10h */
    415 	__be16          prlo_len;       /* payload length */
    416 };
    417 
    418 /*
    419  * ELS_ADISC payload
    420  */
    421 struct fc_els_adisc {
    422 	__u8		adisc_cmd;
    423 	__u8		adisc_resv[3];
    424 	__u8            adisc_resv1;
    425 	__u8            adisc_hard_addr[3];
    426 	__be64          adisc_wwpn;
    427 	__be64          adisc_wwnn;
    428 	__u8            adisc_resv2;
    429 	__u8            adisc_port_id[3];
    430 } __attribute__((__packed__));
    431 
    432 /*
    433  * ELS_LOGO - process or fabric logout.
    434  */
    435 struct fc_els_logo {
    436 	__u8		fl_cmd;		/* command code */
    437 	__u8		fl_zero[3];	/* specified as zero - part of cmd */
    438 	__u8		fl_resvd;	/* reserved */
    439 	__u8		fl_n_port_id[3];/* N port ID */
    440 	__be64		fl_n_port_wwn;	/* port name */
    441 };
    442 
    443 /*
    444  * ELS_RTV - read timeout value.
    445  */
    446 struct fc_els_rtv {
    447 	__u8		rtv_cmd;	/* command code 0x0e */
    448 	__u8		rtv_zero[3];	/* specified as zero - part of cmd */
    449 };
    450 
    451 /*
    452  * LS_ACC for ELS_RTV - read timeout value.
    453  */
    454 struct fc_els_rtv_acc {
    455 	__u8		rtv_cmd;	/* command code 0x02 */
    456 	__u8		rtv_zero[3];	/* specified as zero - part of cmd */
    457 	__be32		rtv_r_a_tov;	/* resource allocation timeout value */
    458 	__be32		rtv_e_d_tov;	/* error detection timeout value */
    459 	__be32		rtv_toq;	/* timeout qualifier (see below) */
    460 };
    461 
    462 /*
    463  * rtv_toq bits.
    464  */
    465 #define	FC_ELS_RTV_EDRES (1 << 26)	/* E_D_TOV resolution is nS else mS */
    466 #define	FC_ELS_RTV_RTTOV (1 << 19)	/* R_T_TOV is 100 uS else 100 mS */
    467 
    468 /*
    469  * ELS_SCR - state change registration payload.
    470  */
    471 struct fc_els_scr {
    472 	__u8		scr_cmd;	/* command code */
    473 	__u8		scr_resv[6];	/* reserved */
    474 	__u8		scr_reg_func;	/* registration function (see below) */
    475 };
    476 
    477 enum fc_els_scr_func {
    478 	ELS_SCRF_FAB =	1,	/* fabric-detected registration */
    479 	ELS_SCRF_NPORT = 2,	/* Nx_Port-detected registration */
    480 	ELS_SCRF_FULL =	3,	/* full registration */
    481 	ELS_SCRF_CLEAR = 255,	/* remove any current registrations */
    482 };
    483 
    484 /*
    485  * ELS_RSCN - registered state change notification payload.
    486  */
    487 struct fc_els_rscn {
    488 	__u8		rscn_cmd;	/* RSCN opcode (0x61) */
    489 	__u8		rscn_page_len;	/* page length (4) */
    490 	__be16		rscn_plen;	/* payload length including this word */
    491 
    492 	/* followed by 4-byte generic affected Port_ID pages */
    493 };
    494 
    495 struct fc_els_rscn_page {
    496 	__u8		rscn_page_flags; /* event and address format */
    497 	__u8		rscn_fid[3];	/* fabric ID */
    498 };
    499 
    500 #define	ELS_RSCN_EV_QUAL_BIT	2	/* shift count for event qualifier */
    501 #define	ELS_RSCN_EV_QUAL_MASK	0xf	/* mask for event qualifier */
    502 #define	ELS_RSCN_ADDR_FMT_BIT	0	/* shift count for address format */
    503 #define	ELS_RSCN_ADDR_FMT_MASK	0x3	/* mask for address format */
    504 
    505 enum fc_els_rscn_ev_qual {
    506 	ELS_EV_QUAL_NONE = 0,		/* unspecified */
    507 	ELS_EV_QUAL_NS_OBJ = 1,		/* changed name server object */
    508 	ELS_EV_QUAL_PORT_ATTR = 2,	/* changed port attribute */
    509 	ELS_EV_QUAL_SERV_OBJ = 3,	/* changed service object */
    510 	ELS_EV_QUAL_SW_CONFIG = 4,	/* changed switch configuration */
    511 	ELS_EV_QUAL_REM_OBJ = 5,	/* removed object */
    512 };
    513 
    514 enum fc_els_rscn_addr_fmt {
    515 	ELS_ADDR_FMT_PORT = 0,	/* rscn_fid is a port address */
    516 	ELS_ADDR_FMT_AREA = 1,	/* rscn_fid is a area address */
    517 	ELS_ADDR_FMT_DOM = 2,	/* rscn_fid is a domain address */
    518 	ELS_ADDR_FMT_FAB = 3,	/* anything on fabric may have changed */
    519 };
    520 
    521 /*
    522  * ELS_RNID - request Node ID.
    523  */
    524 struct fc_els_rnid {
    525 	__u8		rnid_cmd;	/* RNID opcode (0x78) */
    526 	__u8		rnid_resv[3];	/* reserved */
    527 	__u8		rnid_fmt;	/* data format */
    528 	__u8		rnid_resv2[3];	/* reserved */
    529 };
    530 
    531 /*
    532  * Node Identification Data formats (rnid_fmt)
    533  */
    534 enum fc_els_rnid_fmt {
    535 	ELS_RNIDF_NONE = 0,		/* no specific identification data */
    536 	ELS_RNIDF_GEN = 0xdf,		/* general topology discovery format */
    537 };
    538 
    539 /*
    540  * ELS_RNID response.
    541  */
    542 struct fc_els_rnid_resp {
    543 	__u8		rnid_cmd;	/* response code (LS_ACC) */
    544 	__u8		rnid_resv[3];	/* reserved */
    545 	__u8		rnid_fmt;	/* data format */
    546 	__u8		rnid_cid_len;	/* common ID data length */
    547 	__u8		rnid_resv2;	/* reserved */
    548 	__u8		rnid_sid_len;	/* specific ID data length */
    549 };
    550 
    551 struct fc_els_rnid_cid {
    552 	__be64		rnid_wwpn;	/* N port name */
    553 	__be64		rnid_wwnn;	/* node name */
    554 };
    555 
    556 struct fc_els_rnid_gen {
    557 	__u8		rnid_vend_id[16]; /* vendor-unique ID */
    558 	__be32		rnid_atype;	/* associated type (see below) */
    559 	__be32		rnid_phys_port;	/* physical port number */
    560 	__be32		rnid_att_nodes;	/* number of attached nodes */
    561 	__u8		rnid_node_mgmt;	/* node management (see below) */
    562 	__u8		rnid_ip_ver;	/* IP version (see below) */
    563 	__be16		rnid_prot_port;	/* UDP / TCP port number */
    564 	__be32		rnid_ip_addr[4]; /* IP address */
    565 	__u8		rnid_resvd[2];	/* reserved */
    566 	__be16		rnid_vend_spec;	/* vendor-specific field */
    567 };
    568 
    569 enum fc_els_rnid_atype {
    570 	ELS_RNIDA_UNK =		0x01,	/* unknown */
    571 	ELS_RNIDA_OTHER =	0x02,	/* none of the following */
    572 	ELS_RNIDA_HUB =		0x03,
    573 	ELS_RNIDA_SWITCH =	0x04,
    574 	ELS_RNIDA_GATEWAY =	0x05,
    575 	ELS_RNIDA_CONV =	0x06,   /* Obsolete, do not use this value */
    576 	ELS_RNIDA_HBA =	        0x07,   /* Obsolete, do not use this value */
    577 	ELS_RNIDA_PROXY =       0x08,   /* Obsolete, do not use this value */
    578 	ELS_RNIDA_STORAGE =	0x09,
    579 	ELS_RNIDA_HOST =	0x0a,
    580 	ELS_RNIDA_SUBSYS =	0x0b,	/* storage subsystem (e.g., RAID) */
    581 	ELS_RNIDA_ACCESS =	0x0e,	/* access device (e.g. media changer) */
    582 	ELS_RNIDA_NAS =		0x11,	/* NAS server */
    583 	ELS_RNIDA_BRIDGE =	0x12,	/* bridge */
    584 	ELS_RNIDA_VIRT =	0x13,	/* virtualization device */
    585 	ELS_RNIDA_MF =		0xff,	/* multifunction device (bits below) */
    586 	ELS_RNIDA_MF_HUB =	1UL << 31, 	/* hub */
    587 	ELS_RNIDA_MF_SW =	1UL << 30, 	/* switch */
    588 	ELS_RNIDA_MF_GW =	1UL << 29,	/* gateway */
    589 	ELS_RNIDA_MF_ST =	1UL << 28,	/* storage */
    590 	ELS_RNIDA_MF_HOST =	1UL << 27,	/* host */
    591 	ELS_RNIDA_MF_SUB =	1UL << 26,	/* storage subsystem */
    592 	ELS_RNIDA_MF_ACC =	1UL << 25,	/* storage access dev */
    593 	ELS_RNIDA_MF_WDM =	1UL << 24,	/* wavelength division mux */
    594 	ELS_RNIDA_MF_NAS =	1UL << 23,	/* NAS server */
    595 	ELS_RNIDA_MF_BR =	1UL << 22,	/* bridge */
    596 	ELS_RNIDA_MF_VIRT =	1UL << 21,	/* virtualization device */
    597 };
    598 
    599 enum fc_els_rnid_mgmt {
    600 	ELS_RNIDM_SNMP =	0,
    601 	ELS_RNIDM_TELNET =	1,
    602 	ELS_RNIDM_HTTP =	2,
    603 	ELS_RNIDM_HTTPS =	3,
    604 	ELS_RNIDM_XML =		4,	/* HTTP + XML */
    605 };
    606 
    607 enum fc_els_rnid_ipver {
    608 	ELS_RNIDIP_NONE =	0,	/* no IP support or node mgmt. */
    609 	ELS_RNIDIP_V4 =		1,	/* IPv4 */
    610 	ELS_RNIDIP_V6 =		2,	/* IPv6 */
    611 };
    612 
    613 /*
    614  * ELS RPL - Read Port List.
    615  */
    616 struct fc_els_rpl {
    617 	__u8		rpl_cmd;	/* command */
    618 	__u8		rpl_resv[5];	/* reserved - must be zero */
    619 	__be16		rpl_max_size;	/* maximum response size or zero */
    620 	__u8		rpl_resv1;	/* reserved - must be zero */
    621 	__u8		rpl_index[3];	/* starting index */
    622 };
    623 
    624 /*
    625  * Port number block in RPL response.
    626  */
    627 struct fc_els_pnb {
    628 	__be32		pnb_phys_pn;	/* physical port number */
    629 	__u8		pnb_resv;	/* reserved */
    630 	__u8		pnb_port_id[3];	/* port ID */
    631 	__be64		pnb_wwpn;	/* port name */
    632 };
    633 
    634 /*
    635  * RPL LS_ACC response.
    636  */
    637 struct fc_els_rpl_resp {
    638 	__u8		rpl_cmd;	/* ELS_LS_ACC */
    639 	__u8		rpl_resv1;	/* reserved - must be zero */
    640 	__be16		rpl_plen;	/* payload length */
    641 	__u8		rpl_resv2;	/* reserved - must be zero */
    642 	__u8		rpl_llen[3];	/* list length */
    643 	__u8		rpl_resv3;	/* reserved - must be zero */
    644 	__u8		rpl_index[3];	/* starting index */
    645 	struct fc_els_pnb rpl_pnb[1];	/* variable number of PNBs */
    646 };
    647 
    648 /*
    649  * Link Error Status Block.
    650  */
    651 struct fc_els_lesb {
    652 	__be32		lesb_link_fail;	/* link failure count */
    653 	__be32		lesb_sync_loss;	/* loss of synchronization count */
    654 	__be32		lesb_sig_loss;	/* loss of signal count */
    655 	__be32		lesb_prim_err;	/* primitive sequence error count */
    656 	__be32		lesb_inv_word;	/* invalid transmission word count */
    657 	__be32		lesb_inv_crc;	/* invalid CRC count */
    658 };
    659 
    660 /*
    661  * ELS RPS - Read Port Status Block request.
    662  */
    663 struct fc_els_rps {
    664 	__u8		rps_cmd;	/* command */
    665 	__u8		rps_resv[2];	/* reserved - must be zero */
    666 	__u8		rps_flag;	/* flag - see below */
    667 	__be64		rps_port_spec;	/* port selection */
    668 };
    669 
    670 enum fc_els_rps_flag {
    671 	FC_ELS_RPS_DID =	0x00,	/* port identified by D_ID of req. */
    672 	FC_ELS_RPS_PPN =	0x01,	/* port_spec is physical port number */
    673 	FC_ELS_RPS_WWPN =	0x02,	/* port_spec is port WWN */
    674 };
    675 
    676 /*
    677  * ELS RPS LS_ACC response.
    678  */
    679 struct fc_els_rps_resp {
    680 	__u8		rps_cmd;	/* command - LS_ACC */
    681 	__u8		rps_resv[2];	/* reserved - must be zero */
    682 	__u8		rps_flag;	/* flag - see below */
    683 	__u8		rps_resv2[2];	/* reserved */
    684 	__be16		rps_status;	/* port status - see below */
    685 	struct fc_els_lesb rps_lesb;	/* link error status block */
    686 };
    687 
    688 enum fc_els_rps_resp_flag {
    689 	FC_ELS_RPS_LPEV =	0x01,	/* L_port extension valid */
    690 };
    691 
    692 enum fc_els_rps_resp_status {
    693 	FC_ELS_RPS_PTP =	1 << 5,	/* point-to-point connection */
    694 	FC_ELS_RPS_LOOP =	1 << 4,	/* loop mode */
    695 	FC_ELS_RPS_FAB =	1 << 3,	/* fabric present */
    696 	FC_ELS_RPS_NO_SIG =	1 << 2,	/* loss of signal */
    697 	FC_ELS_RPS_NO_SYNC =	1 << 1,	/* loss of synchronization */
    698 	FC_ELS_RPS_RESET =	1 << 0,	/* in link reset protocol */
    699 };
    700 
    701 /*
    702  * ELS LIRR - Link Incident Record Registration request.
    703  */
    704 struct fc_els_lirr {
    705 	__u8		lirr_cmd;	/* command */
    706 	__u8		lirr_resv[3];	/* reserved - must be zero */
    707 	__u8		lirr_func;	/* registration function */
    708 	__u8		lirr_fmt;	/* FC-4 type of RLIR requested */
    709 	__u8		lirr_resv2[2];	/* reserved - must be zero */
    710 };
    711 
    712 enum fc_els_lirr_func {
    713 	ELS_LIRR_SET_COND = 	0x01,	/* set - conditionally receive */
    714 	ELS_LIRR_SET_UNCOND = 	0x02,	/* set - unconditionally receive */
    715 	ELS_LIRR_CLEAR = 	0xff	/* clear registration */
    716 };
    717 
    718 /*
    719  * ELS SRL - Scan Remote Loop request.
    720  */
    721 struct fc_els_srl {
    722 	__u8		srl_cmd;	/* command */
    723 	__u8		srl_resv[3];	/* reserved - must be zero */
    724 	__u8		srl_flag;	/* flag - see below */
    725 	__u8		srl_flag_param[3];	/* flag parameter */
    726 };
    727 
    728 enum fc_els_srl_flag {
    729 	FC_ELS_SRL_ALL =	0x00,	/* scan all FL ports */
    730 	FC_ELS_SRL_ONE =	0x01,	/* scan specified loop */
    731 	FC_ELS_SRL_EN_PER =	0x02,	/* enable periodic scanning (param) */
    732 	FC_ELS_SRL_DIS_PER =	0x03,	/* disable periodic scanning */
    733 };
    734 
    735 /*
    736  * ELS RLS - Read Link Error Status Block request.
    737  */
    738 struct fc_els_rls {
    739 	__u8		rls_cmd;	/* command */
    740 	__u8		rls_resv[4];	/* reserved - must be zero */
    741 	__u8		rls_port_id[3];	/* port ID */
    742 };
    743 
    744 /*
    745  * ELS RLS LS_ACC Response.
    746  */
    747 struct fc_els_rls_resp {
    748 	__u8		rls_cmd;	/* ELS_LS_ACC */
    749 	__u8		rls_resv[3];	/* reserved - must be zero */
    750 	struct fc_els_lesb rls_lesb;	/* link error status block */
    751 };
    752 
    753 /*
    754  * ELS RLIR - Registered Link Incident Report.
    755  * This is followed by the CLIR and the CLID, described below.
    756  */
    757 struct fc_els_rlir {
    758 	__u8		rlir_cmd;	/* command */
    759 	__u8		rlir_resv[3];	/* reserved - must be zero */
    760 	__u8		rlir_fmt;	/* format (FC4-type if type specific) */
    761 	__u8		rlir_clr_len;	/* common link incident record length */
    762 	__u8		rlir_cld_len;	/* common link incident desc. length */
    763 	__u8		rlir_slr_len;	/* spec. link incident record length */
    764 };
    765 
    766 /*
    767  * CLIR - Common Link Incident Record Data. - Sent via RLIR.
    768  */
    769 struct fc_els_clir {
    770 	__be64		clir_wwpn;	/* incident port name */
    771 	__be64		clir_wwnn;	/* incident port node name */
    772 	__u8		clir_port_type;	/* incident port type */
    773 	__u8		clir_port_id[3];	/* incident port ID */
    774 
    775 	__be64		clir_conn_wwpn;	/* connected port name */
    776 	__be64		clir_conn_wwnn;	/* connected node name */
    777 	__be64		clir_fab_name;	/* fabric name */
    778 	__be32		clir_phys_port;	/* physical port number */
    779 	__be32		clir_trans_id;	/* transaction ID */
    780 	__u8		clir_resv[3];	/* reserved */
    781 	__u8		clir_ts_fmt;	/* time stamp format */
    782 	__be64		clir_timestamp;	/* time stamp */
    783 };
    784 
    785 /*
    786  * CLIR clir_ts_fmt - time stamp format values.
    787  */
    788 enum fc_els_clir_ts_fmt {
    789 	ELS_CLIR_TS_UNKNOWN = 	0,	/* time stamp field unknown */
    790 	ELS_CLIR_TS_SEC_FRAC = 	1,	/* time in seconds and fractions */
    791 	ELS_CLIR_TS_CSU =	2,	/* time in clock synch update format */
    792 };
    793 
    794 /*
    795  * Common Link Incident Descriptor - sent via RLIR.
    796  */
    797 struct fc_els_clid {
    798 	__u8		clid_iq;	/* incident qualifier flags */
    799 	__u8		clid_ic;	/* incident code */
    800 	__be16		clid_epai;	/* domain/area of ISL */
    801 };
    802 
    803 /*
    804  * CLID incident qualifier flags.
    805  */
    806 enum fc_els_clid_iq {
    807 	ELS_CLID_SWITCH =	0x20,	/* incident port is a switch node */
    808 	ELS_CLID_E_PORT =	0x10,	/* incident is an ISL (E) port */
    809 	ELS_CLID_SEV_MASK =	0x0c,	/* severity 2-bit field mask */
    810 	ELS_CLID_SEV_INFO =	0x00,	/* report is informational */
    811 	ELS_CLID_SEV_INOP =	0x08,	/* link not operational */
    812 	ELS_CLID_SEV_DEG =	0x04,	/* link degraded but operational */
    813 	ELS_CLID_LASER =	0x02,	/* subassembly is a laser */
    814 	ELS_CLID_FRU =		0x01,	/* format can identify a FRU */
    815 };
    816 
    817 /*
    818  * CLID incident code.
    819  */
    820 enum fc_els_clid_ic {
    821 	ELS_CLID_IC_IMPL =	1,	/* implicit incident */
    822 	ELS_CLID_IC_BER =	2,	/* bit-error-rate threshold exceeded */
    823 	ELS_CLID_IC_LOS =	3,	/* loss of synch or signal */
    824 	ELS_CLID_IC_NOS =	4,	/* non-operational primitive sequence */
    825 	ELS_CLID_IC_PST =	5,	/* primitive sequence timeout */
    826 	ELS_CLID_IC_INVAL =	6,	/* invalid primitive sequence */
    827 	ELS_CLID_IC_LOOP_TO =	7,	/* loop initialization time out */
    828 	ELS_CLID_IC_LIP =	8,	/* receiving LIP */
    829 };
    830 
    831 #endif /* _FC_ELS_H_ */
    832