ref: 41e27b2d10c6a60c49931332e8677438736a1e36
dir: /os/boot/puma/ether.h/
/* * All the goo for PC ethernet cards. */ typedef struct Card Card; typedef struct RingBuf RingBuf; typedef struct Type Type; typedef struct Ctlr Ctlr; /* * Hardware interface. */ struct Card { ISAConf; int (*reset)(Ctlr*); void (*attach)(Ctlr*); void *(*read)(Ctlr*, void*, ulong, ulong); void *(*write)(Ctlr*, ulong, void*, ulong); void (*receive)(Ctlr*); void (*transmit)(Ctlr*); void (*intr)(Ureg*, Ctlr*); void (*overflow)(Ctlr*); uchar bit16; /* true if a 16 bit interface */ uchar ram; /* true if card has shared memory */ ulong dp8390; /* I/O address of 8390 (if any) */ ulong data; /* I/O data port if no shared memory */ uchar nxtpkt; /* software bndry */ uchar tstart; /* 8390 ring addresses */ uchar pstart; uchar pstop; uchar dummyrr; /* do dummy remote read */ }; /* * Software ring buffer. */ struct RingBuf { uchar owner; uchar busy; /* unused */ ushort len; uchar pkt[sizeof(Etherpkt)]; }; enum { Host = 0, /* buffer owned by host */ Interface = 1, /* buffer owned by card */ Nrb = 16, /* default number of receive buffers */ Ntb = 2, /* default number of transmit buffers */ }; /* * Software controller. */ struct Ctlr { Card card; /* hardware info */ int ctlrno; int present; Queue* iq; Queue* oq; int inpackets; int outpackets; int crcs; /* input crc errors */ int oerrs; /* output errors */ int frames; /* framing errors */ int overflows; /* packet overflows */ int buffs; /* buffering errors */ }; #define NEXT(x, l) (((x)+1)%(l)) #define HOWMANY(x, y) (((x)+((y)-1))/(y)) #define ROUNDUP(x, y) (HOWMANY((x), (y))*(y)) extern int cs8900reset(Ctlr*); extern int etheriq(Ctlr*, Block*, int);