/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Copyright(c) 2007 Intel Corporation. All rights reserved.
 *
 * Maintained at www.Open-FCoE.org
 */

#ifndef _FC_ELS_H_
#define _FC_ELS_H_

#include <linux/types.h>
#include <asm/byteorder.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_FPIN =      0x16,   /* Fabric Performance Impact Notification */
        ELS_EDC =       0x17,   /* Exchange Diagnostic Capabilities */
        ELS_RDP =       0x18,   /* Read Diagnostic Parameters */
        ELS_RDF =       0x19,   /* Register Diagnostic Functions */
        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_FPIN] =    "FPIN",                 \
        [ELS_EDC] =     "EDC",                  \
        [ELS_RDP] =     "RDP",                  \
        [ELS_RDF] =     "RDF",                  \
        [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 */
};

/*
 * Link Service TLV Descriptor Tag Values
 */
enum fc_ls_tlv_dtag {
        ELS_DTAG_LS_REQ_INFO =          0x00000001,
                /* Link Service Request Information Descriptor */
        ELS_DTAG_LNK_FAULT_CAP =        0x0001000D,
                /* Link Fault Capability Descriptor */
        ELS_DTAG_CG_SIGNAL_CAP =        0x0001000F,
                /* Congestion Signaling Capability Descriptor */
        ELS_DTAG_LNK_INTEGRITY =        0x00020001,
                /* Link Integrity Notification Descriptor */
        ELS_DTAG_DELIVERY =             0x00020002,
                /* Delivery Notification Descriptor */
        ELS_DTAG_PEER_CONGEST =         0x00020003,
                /* Peer Congestion Notification Descriptor */
        ELS_DTAG_CONGESTION =           0x00020004,
                /* Congestion Notification Descriptor */
        ELS_DTAG_FPIN_REGISTER =        0x00030001,
                /* FPIN Registration Descriptor */
};

/*
 * Initializer useful for decoding table.
 * Please keep this in sync with the above definitions.
 */
#define FC_LS_TLV_DTAG_INIT {                                         \
        { ELS_DTAG_LS_REQ_INFO,         "Link Service Request Information" }, \
        { ELS_DTAG_LNK_FAULT_CAP,       "Link Fault Capability" },            \
        { ELS_DTAG_CG_SIGNAL_CAP,       "Congestion Signaling Capability" },  \
        { ELS_DTAG_LNK_INTEGRITY,       "Link Integrity Notification" },      \
        { ELS_DTAG_DELIVERY,            "Delivery Notification Present" },    \
        { ELS_DTAG_PEER_CONGEST,        "Peer Congestion Notification" },     \
        { ELS_DTAG_CONGESTION,          "Congestion Notification" },          \
        { ELS_DTAG_FPIN_REGISTER,       "FPIN Registration" },                \
}


/*
 * Generic Link Service TLV Descriptor format
 *
 * This structure, as it defines no payload, will also be referred to
 * as the "tlv header" - which contains the tag and len fields.
 */
struct fc_tlv_desc {
        __be32          desc_tag;       /* Notification Descriptor Tag */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         */
        __u8            desc_value[0];  /* Descriptor Value */
};

/* Descriptor tag and len fields are considered the mandatory header
 * for a descriptor
 */
#define FC_TLV_DESC_HDR_SZ      sizeof(struct fc_tlv_desc)

/*
 * Macro, used when initializing payloads, to return the descriptor length.
 * Length is size of descriptor minus the tag and len fields.
 */
#define FC_TLV_DESC_LENGTH_FROM_SZ(desc)        \
                (sizeof(desc) - FC_TLV_DESC_HDR_SZ)

/* Macro, used on received payloads, to return the descriptor length */
#define FC_TLV_DESC_SZ_FROM_LENGTH(tlv)         \
                (__be32_to_cpu((tlv)->desc_len) + FC_TLV_DESC_HDR_SZ)

/*
 * This helper is used to walk descriptors in a descriptor list.
 * Given the address of the current descriptor, which minimally contains a
 * tag and len field, calculate the address of the next descriptor based
 * on the len field.
 */
static inline void *fc_tlv_next_desc(void *desc)
{
        struct fc_tlv_desc *tlv = desc;

        return (desc + FC_TLV_DESC_SZ_FROM_LENGTH(tlv));
}


/*
 * Link Service Request Information Descriptor
 */
struct fc_els_lsri_desc {
        __be32          desc_tag;       /* descriptor tag (0x0000 0001) */
        __be32          desc_len;       /* Length of Descriptor (in bytes) (4).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         */
        struct {
                __u8    cmd;            /* ELS cmd byte */
                __u8    bytes[3];       /* bytes 1..3 */
        } rqst_w0;                      /* Request word 0 */
};


/*
 * 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 */
};

/*
 * Link Integrity event types
 */
enum fc_fpin_li_event_types {
        FPIN_LI_UNKNOWN =               0x0,
        FPIN_LI_LINK_FAILURE =          0x1,
        FPIN_LI_LOSS_OF_SYNC =          0x2,
        FPIN_LI_LOSS_OF_SIG =           0x3,
        FPIN_LI_PRIM_SEQ_ERR =          0x4,
        FPIN_LI_INVALID_TX_WD =         0x5,
        FPIN_LI_INVALID_CRC =           0x6,
        FPIN_LI_DEVICE_SPEC =           0xF,
};

/*
 * Initializer useful for decoding table.
 * Please keep this in sync with the above definitions.
 */
#define FC_FPIN_LI_EVT_TYPES_INIT {                                     \
        { FPIN_LI_UNKNOWN,              "Unknown" },                    \
        { FPIN_LI_LINK_FAILURE,         "Link Failure" },               \
        { FPIN_LI_LOSS_OF_SYNC,         "Loss of Synchronization" },    \
        { FPIN_LI_LOSS_OF_SIG,          "Loss of Signal" },             \
        { FPIN_LI_PRIM_SEQ_ERR,         "Primitive Sequence Protocol Error" }, \
        { FPIN_LI_INVALID_TX_WD,        "Invalid Transmission Word" },  \
        { FPIN_LI_INVALID_CRC,          "Invalid CRC" },                \
        { FPIN_LI_DEVICE_SPEC,          "Device Specific" },            \
}

/*
 * Delivery event types
 */
enum fc_fpin_deli_event_types {
        FPIN_DELI_UNKNOWN =             0x0,
        FPIN_DELI_TIMEOUT =             0x1,
        FPIN_DELI_UNABLE_TO_ROUTE =     0x2,
        FPIN_DELI_DEVICE_SPEC =         0xF,
};

/*
 * Initializer useful for decoding table.
 * Please keep this in sync with the above definitions.
 */
#define FC_FPIN_DELI_EVT_TYPES_INIT {                                   \
        { FPIN_DELI_UNKNOWN,            "Unknown" },                    \
        { FPIN_DELI_TIMEOUT,            "Timeout" },                    \
        { FPIN_DELI_UNABLE_TO_ROUTE,    "Unable to Route" },            \
        { FPIN_DELI_DEVICE_SPEC,        "Device Specific" },            \
}

/*
 * Congestion event types
 */
enum fc_fpin_congn_event_types {
        FPIN_CONGN_CLEAR =              0x0,
        FPIN_CONGN_LOST_CREDIT =        0x1,
        FPIN_CONGN_CREDIT_STALL =       0x2,
        FPIN_CONGN_OVERSUBSCRIPTION =   0x3,
        FPIN_CONGN_DEVICE_SPEC =        0xF,
};

/*
 * Initializer useful for decoding table.
 * Please keep this in sync with the above definitions.
 */
#define FC_FPIN_CONGN_EVT_TYPES_INIT {                                  \
        { FPIN_CONGN_CLEAR,             "Clear" },                      \
        { FPIN_CONGN_LOST_CREDIT,       "Lost Credit" },                \
        { FPIN_CONGN_CREDIT_STALL,      "Credit Stall" },               \
        { FPIN_CONGN_OVERSUBSCRIPTION,  "Oversubscription" },           \
        { FPIN_CONGN_DEVICE_SPEC,       "Device Specific" },            \
}

enum fc_fpin_congn_severity_types {

        FPIN_CONGN_SEVERITY_WARNING =   0xF1,
        FPIN_CONGN_SEVERITY_ERROR =     0xF7,
};

/*
 * Link Integrity Notification Descriptor
 */
struct fc_fn_li_desc {
        __be32          desc_tag;       /* Descriptor Tag (0x00020001) */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         */
        __be64          detecting_wwpn; /* Port Name that detected event */
        __be64          attached_wwpn;  /* Port Name of device attached to
                                         * detecting Port Name
                                         */
        __be16          event_type;     /* see enum fc_fpin_li_event_types */
        __be16          event_modifier; /* Implementation specific value
                                         * describing the event type
                                         */
        __be32          event_threshold;/* duration in ms of the link
                                         * integrity detection cycle
                                         */
        __be32          event_count;    /* minimum number of event
                                         * occurrences during the event
                                         * threshold to caause the LI event
                                         */
        __be32          pname_count;    /* number of portname_list elements */
        __be64          pname_list[0];  /* list of N_Port_Names accessible
                                         * through the attached port
                                         */
};

/*
 * Delivery Notification Descriptor
 */
struct fc_fn_deli_desc {
        __be32          desc_tag;       /* Descriptor Tag (0x00020002) */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         */
        __be64          detecting_wwpn; /* Port Name that detected event */
        __be64          attached_wwpn;  /* Port Name of device attached to
                                         * detecting Port Name
                                         */
        __be32          deli_reason_code;/* see enum fc_fpin_deli_event_types */
};

/*
 * Peer Congestion Notification Descriptor
 */
struct fc_fn_peer_congn_desc {
        __be32          desc_tag;       /* Descriptor Tag (0x00020003) */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         */
        __be64          detecting_wwpn; /* Port Name that detected event */
        __be64          attached_wwpn;  /* Port Name of device attached to
                                         * detecting Port Name
                                         */
        __be16          event_type;     /* see enum fc_fpin_congn_event_types */
        __be16          event_modifier; /* Implementation specific value
                                         * describing the event type
                                         */
        __be32          event_period;   /* duration (ms) of the detected
                                         * congestion event
                                         */
        __be32          pname_count;    /* number of portname_list elements */
        __be64          pname_list[0];  /* list of N_Port_Names accessible
                                         * through the attached port
                                         */
};

/*
 * Congestion Notification Descriptor
 */
struct fc_fn_congn_desc {
        __be32          desc_tag;       /* Descriptor Tag (0x00020004) */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         */
        __be16          event_type;     /* see enum fc_fpin_congn_event_types */
        __be16          event_modifier; /* Implementation specific value
                                         * describing the event type
                                         */
        __be32          event_period;   /* duration (ms) of the detected
                                         * congestion event
                                         */
        __u8            severity;       /* command */
        __u8            resv[3];        /* reserved - must be zero */
};

/*
 * ELS_FPIN - Fabric Performance Impact Notification
 */
struct fc_els_fpin {
        __u8            fpin_cmd;       /* command (0x16) */
        __u8            fpin_zero[3];   /* specified as zero - part of cmd */
        __be32          desc_len;       /* Length of Descriptor List (in bytes).
                                         * Size of ELS excluding fpin_cmd,
                                         * fpin_zero and desc_len fields.
                                         */
        struct fc_tlv_desc      fpin_desc[0];   /* Descriptor list */
};

/* Diagnostic Function Descriptor - FPIN Registration */
struct fc_df_desc_fpin_reg {
        __be32          desc_tag;       /* FPIN Registration (0x00030001) */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         */
        __be32          count;          /* Number of desc_tags elements */
        __be32          desc_tags[0];   /* Array of Descriptor Tags.
                                         * Each tag indicates a function
                                         * supported by the N_Port (request)
                                         * or by the  N_Port and Fabric
                                         * Controller (reply; may be a subset
                                         * of the request).
                                         * See ELS_FN_DTAG_xxx for tag values.
                                         */
};

/*
 * ELS_RDF - Register Diagnostic Functions
 */
struct fc_els_rdf {
        __u8            fpin_cmd;       /* command (0x19) */
        __u8            fpin_zero[3];   /* specified as zero - part of cmd */
        __be32          desc_len;       /* Length of Descriptor List (in bytes).
                                         * Size of ELS excluding fpin_cmd,
                                         * fpin_zero and desc_len fields.
                                         */
        struct fc_tlv_desc      desc[0];        /* Descriptor list */
};

/*
 * ELS RDF LS_ACC Response.
 */
struct fc_els_rdf_resp {
        struct fc_els_ls_acc    acc_hdr;
        __be32                  desc_list_len;  /* Length of response (in
                                                 * bytes). Excludes acc_hdr
                                                 * and desc_list_len fields.
                                                 */
        struct fc_els_lsri_desc lsri;
        struct fc_tlv_desc      desc[0];        /* Supported Descriptor list */
};


/*
 * Diagnostic Capability Descriptors for EDC ELS
 */

/*
 * Diagnostic: Link Fault Capability Descriptor
 */
struct fc_diag_lnkflt_desc {
        __be32          desc_tag;       /* Descriptor Tag (0x0001000D) */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         * 12 bytes
                                         */
        __be32          degrade_activate_threshold;
        __be32          degrade_deactivate_threshold;
        __be32          fec_degrade_interval;
};

enum fc_edc_cg_signal_cap_types {
        /* Note: Capability: bits 31:4 Rsvd; bits 3:0 are capabilities */
        EDC_CG_SIG_NOTSUPPORTED =       0x00, /* neither supported */
        EDC_CG_SIG_WARN_ONLY =          0x01,
        EDC_CG_SIG_WARN_ALARM =         0x02, /* both supported */
};

/*
 * Initializer useful for decoding table.
 * Please keep this in sync with the above definitions.
 */
#define FC_EDC_CG_SIGNAL_CAP_TYPES_INIT {                               \
        { EDC_CG_SIG_NOTSUPPORTED,      "Signaling Not Supported" },    \
        { EDC_CG_SIG_WARN_ONLY,         "Warning Signal" },             \
        { EDC_CG_SIG_WARN_ALARM,        "Warning and Alarm Signals" },  \
}

enum fc_diag_cg_sig_freq_types {
        EDC_CG_SIGFREQ_CNT_MIN =        1,      /* Min Frequency Count */
        EDC_CG_SIGFREQ_CNT_MAX =        999,    /* Max Frequency Count */

        EDC_CG_SIGFREQ_SEC =            0x1,    /* Units: seconds */
        EDC_CG_SIGFREQ_MSEC =           0x2,    /* Units: milliseconds */
};

struct fc_diag_cg_sig_freq {
        __be16          count;          /* Time between signals
                                         * note: upper 6 bits rsvd
                                         */
        __be16          units;          /* Time unit for count
                                         * note: upper 12 bits rsvd
                                         */
};

/*
 * Diagnostic: Congestion Signaling Capability Descriptor
 */
struct fc_diag_cg_sig_desc {
        __be32          desc_tag;       /* Descriptor Tag (0x0001000F) */
        __be32          desc_len;       /* Length of Descriptor (in bytes).
                                         * Size of descriptor excluding
                                         * desc_tag and desc_len fields.
                                         * 16 bytes
                                         */
        __be32                          xmt_signal_capability;
        struct fc_diag_cg_sig_freq      xmt_signal_frequency;
        __be32                          rcv_signal_capability;
        struct fc_diag_cg_sig_freq      rcv_signal_frequency;
};

/*
 * ELS_EDC - Exchange Diagnostic Capabilities
 */
struct fc_els_edc {
        __u8            edc_cmd;        /* command (0x17) */
        __u8            edc_zero[3];    /* specified as zero - part of cmd */
        __be32          desc_len;       /* Length of Descriptor List (in bytes).
                                         * Size of ELS excluding edc_cmd,
                                         * edc_zero and desc_len fields.
                                         */
        struct fc_tlv_desc      desc[0];
                                        /* Diagnostic Descriptor list */
};

/*
 * ELS EDC LS_ACC Response.
 */
struct fc_els_edc_resp {
        struct fc_els_ls_acc    acc_hdr;
        __be32                  desc_list_len;  /* Length of response (in
                                                 * bytes). Excludes acc_hdr
                                                 * and desc_list_len fields.
                                                 */
        struct fc_els_lsri_desc lsri;
        struct fc_tlv_desc      desc[0];
                                    /* Supported Diagnostic Descriptor list */
};


#endif /* _FC_ELS_H_ */