ref: 09d11c64e5014a64dbc7b807899b3dd2581fe26f
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);