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1.1 root 1: /*
2: * All the goo for PC ethernet cards.
3: */
4: typedef struct Card Card;
5: typedef struct RingBuf RingBuf;
6: typedef struct Type Type;
7: typedef struct Ctlr Ctlr;
8:
9: /*
10: * Hardware interface.
11: */
12: struct Card {
13: ISAConf;
14:
15: int (*reset)(Ctlr*);
16: void (*attach)(Ctlr*);
17:
18: void *(*read)(Ctlr*, void*, ulong, ulong);
19: void *(*write)(Ctlr*, ulong, void*, ulong);
20:
21: void (*receive)(Ctlr*);
22: void (*transmit)(Ctlr*);
23: void (*intr)(Ureg*, Ctlr*);
24: void (*overflow)(Ctlr*);
25:
26: uchar bit16; /* true if a 16 bit interface */
27: uchar ram; /* true if card has shared memory */
28:
29: ulong dp8390; /* I/O address of 8390 (if any) */
30: ulong data; /* I/O data port if no shared memory */
31: uchar nxtpkt; /* software bndry */
32: uchar tstart; /* 8390 ring addresses */
33: uchar pstart;
34: uchar pstop;
35: };
36:
37: /*
38: * Software ring buffer.
39: */
40: struct RingBuf {
41: uchar owner;
42: uchar busy; /* unused */
43: ushort len;
44: uchar pkt[sizeof(Etherpkt)];
45: };
46:
47: enum {
48: Host = 0, /* buffer owned by host */
49: Interface = 1, /* buffer owned by card */
50:
51: Nrb = 16, /* default number of receive buffers */
52: Ntb = 1, /* default number of transmit buffers */
53: };
54:
55: /*
56: * Software controller.
57: */
58: struct Ctlr {
59: Card card; /* hardware info */
60: int ctlrno;
61: char iname[NAMELEN];
62: char oname[NAMELEN];
63: int present;
64:
65: ushort nrb; /* number of software receive buffers */
66: ushort ntb; /* number of software transmit buffers */
67: RingBuf *rb; /* software receive buffers */
68: RingBuf *tb; /* software transmit buffers */
69:
70: ushort rh; /* first receive buffer belonging to host */
71: ushort ri; /* first receive buffer belonging to card */
72:
73: ushort th; /* first transmit buffer belonging to host */
74: ushort ti; /* first transmit buffer belonging to card */
75: int tbusy; /* transmitter is busy */
76:
77: int inpackets;
78: int outpackets;
79: int crcs; /* input crc errors */
80: int oerrs; /* output errors */
81: int frames; /* framing errors */
82: int overflows; /* packet overflows */
83: int buffs; /* buffering errors */
84: };
85:
86: #define NEXT(x, l) (((x)+1)%(l))
87: #define HOWMANY(x, y) (((x)+((y)-1))/(y))
88: #define ROUNDUP(x, y) (HOWMANY((x), (y))*(y))
89:
90: /*
91: * The Western Digital 8003 and 8013 series, the NE2000
92: * and the 3Com 503 all use the DP8390 Network Interface
93: * Chip.
94: */
95: extern void dp8390reset(Ctlr*);
96: extern void dp8390attach(Ctlr*);
97: extern void dp8390mode(Ctlr*, int);
98: extern void dp8390getea(Ctlr*);
99: extern void dp8390setea(Ctlr*);
100: extern void *dp8390read(Ctlr*, void*, ulong, ulong);
101: extern void *dp8390write(Ctlr*, ulong, void*, ulong);
102: extern void dp8390receive(Ctlr*);
103: extern void dp8390transmit(Ctlr*);
104: extern void dp8390intr(Ureg*, Ctlr*);
105: extern void dp8390overflow(Ctlr*);
106:
107: /*
108: * The DP8390 needs some time between successive
109: * chip selects, so we need special I/O routines.
110: * See l.s.
111: * These routines only need to be used for accessing
112: * the chip registers. Data I/O, either through
113: * remote DMA or shared memory, can use the normal
114: * routines.
115: */
116: extern int dp8390inb(ulong);
117: extern void dp8390outb(ulong, uchar);
118:
119: enum {
120: Dp8390BufSz = 256, /* hardware ring buffer size */
121: };
122:
123: extern int ne2000reset(Ctlr*);
124: extern int ne3210reset(Ctlr*);
125: extern int tcm509reset(Ctlr*);
126: extern int wd8003reset(Ctlr*);
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