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/*

 *      A filtering function.  There are two filters/port.  Filter "0"

 *      is the input filter, and filter "1" is the output filter.

 */

typedef int (FILTER_FUNC)(uchar *pktp, int pktlen, ulong *scratch, int port);

#define NFILTERS        2

/*

 *      The per port structure

 */

typedef struct

{

        int             chan;           /* Channel number (0-3) */

        ulong           portaddr;       /* address of 596 port register */

        volatile ulong  *ca;            /* address of 596 chan attention */

        ulong           intmask;        /* Interrupt mask for this port */

        ulong           intack;         /* Ack bit for this port */

        uchar           ethaddr[6];     /* Ethernet address of this port */

        int             is_promisc;     /* Port is promiscuous */

        int             debug;          /* Debugging turned on */

        I596_ISCP       *iscpp;         /* Uncached ISCP pointer */

        I596_SCP        *scpp;          /* Uncached SCP pointer */

        I596_SCB        *scbp;          /* Uncached SCB pointer */

        I596_ISCP       iscp;

        I596_SCB        scb;

        /* Command Queue */

        I596_CB         *cb0;

        I596_CB         *cbN;

        I596_CB         *cb_head;

        I596_CB         *cb_tail;

        /* Receive Queue */

        I596_RFD        *rfd0;

        I596_RFD        *rfdN;

        I596_RFD        *rfd_head;

        I596_RFD        *rfd_tail;

        /* Receive Buffers */

        I596_RBD        *rbd0;

        I596_RBD        *rbdN;

        I596_RBD        *rbd_head;

        I596_RBD        *rbd_tail;

        int             buf_size;       /* Size of an RBD buffer */

        int             buf_cnt;        /* Total RBD's allocated */

        /* Rx Statistics */

        ulong           cnt_rx_cnt;     /* Total packets rcvd, good and bad */

        ulong           cnt_rx_good;    /* Total good packets rcvd */

        ulong           cnt_rx_bad;     /* Total of all bad packets rcvd */

                                        /* Subtotals can be gotten from SCB */

        ulong           cnt_rx_nores;   /* No resources */

        ulong           cnt_rx_bytes;   /* Total bytes rcvd */

        /* Tx Statistics */

        ulong           cnt_tx_queued;

        ulong           cnt_tx_done;

        ulong           cnt_tx_freed;

        ulong           cnt_tx_nores;   /* No resources */

        ulong           cnt_tx_bad;

        ulong           cnt_tx_err_late;

        ulong           cnt_tx_err_nocrs;

        ulong           cnt_tx_err_nocts;

        ulong           cnt_tx_err_under;

        ulong           cnt_tx_err_maxcol;

        ulong           cnt_tx_collisions;

        /* Special stuff for host */

#       define          rfd_freed       cnt_rx_cnt

        ulong           rbd_freed;

        int             host_timer;

        /* Added after first beta */

        ulong           cnt_tx_races;   /* Counts race conditions */

        int             spanstate;

        ulong           cnt_st_tx;      /* send span tree pkts */

        ulong           cnt_st_fail_tx; /* Failures to send span tree pkts */

        ulong           cnt_st_fail_rbd;/* Failures to send span tree pkts */

        ulong           cnt_st_rx;      /* rcv span tree pkts */

        ulong           cnt_st_rx_bad;  /* bogus st packets rcvd */

        ulong           cnt_rx_fwd;     /* Rcvd packets that were forwarded */

        ulong           cnt_rx_mcast;   /* Multicast pkts received */

        ulong           cnt_tx_mcast;   /* Multicast pkts transmitted */

        ulong           cnt_tx_bytes;   /* Bytes transmitted */

        /*

         *      Packet filtering

         *      Filter 0: input filter

         *      Filter 1: output filter

         */

        ulong           *filter_space[NFILTERS];

        FILTER_FUNC     *filter_func[NFILTERS];

        ulong           filter_cnt[NFILTERS];

        ulong           filter_len[NFILTERS];

        ulong           pad[ (512-300) / 4];

} PORT;

/*

 *      Port[0]                 is host interface

 *      Port[1..SE_NPORTS]      are external 10 Base T ports.  Fewer may be in

 *                              use, depending on whether this is an SE-4 or

 *                              an SE-6.

 *      Port[SE_NPORTS]         Pseudo-port for Spanning tree and SNMP

 */

extern PORT     Port[1+SE_NPORTS+1];

extern int      Nports;         /* Number of genuine ethernet controllers */

extern int      Nchan;          /* ... plus one for host interface */

extern int      FirstChan;      /* 0 or 1, depedning on whether host is used */

extern int      NumChan;        /* 4 or 5 */

/*

 *      A few globals

 */

extern int      IsPromisc;

extern int      MultiNicMode;

/*

 *      Functions

 */

extern void     eth_xmit_spew_on(PORT *p, int cnt);

extern void     eth_xmit_spew_off(PORT *p);

extern I596_RBD *alloc_rbds(PORT *p, int num);

extern I596_CB * eth_cb_alloc(PORT *p);