1992/0407/pc/devether.c (diff list | history)

1992/0406/sys/src/9/pc/devether.c:7,12 – 1992/0407/sys/src/9/pc/devether.c:7,13 (short | long | prev | next)
1992/0406		* output * deal with stalling and restarting output on input overflow * fix magic ring constants
1992/0407		* rewrite per SMC doc
1992/0403		*/ #include "u.h" #include "../port/lib.h"
1992/0406/sys/src/9/pc/devether.c:79,85 – 1992/0407/sys/src/9/pc/devether.c:80,87
1992/0404		struct Ring { uchar status; uchar next; ushort len;
1992/0407		uchar len0; uchar len1;
1992/0404		uchar data[BUFsize-4];
1992/0403		};
1992/0406/sys/src/9/pc/devether.c:101,114 – 1992/0407/sys/src/9/pc/devether.c:103,119
1992/0403		struct Ctlr { QLock;
1992/0407		Ring *ring;
1992/0403		Rendez rr; /* rendezvous for an input buffer */
1992/0407		Queue rq;
1992/0404		uchar bnry; uchar curr; uchar ovw;
1992/0403		Queue rq;
1992/0407		Etherpkt *xpkt;
1992/0404		QLock xl;
1992/0403		Rendez xr;
1992/0407		uchar xbusy;
1992/0403		int iobase; /* I/O base address */
1992/0406/sys/src/9/pc/devether.c:132,137 – 1992/0407/sys/src/9/pc/devether.c:137,150
1992/0403		}; static Ctlr ctlr[Nctlr];
1992/0407		static int isxfree(void *arg) { Ctlr *cp = arg; return cp->xbusy == 0 && cp->ovw == 0; }
1992/0403		static void etheroput(Queue *q, Block *bp) {
1992/0406/sys/src/9/pc/devether.c:184,205 – 1992/0407/sys/src/9/pc/devether.c:197,216
1992/0403		} }
1992/0406		panic("etheroput\n"); #ifdef notdef
1992/0403		/* * only one transmitter at a time */ qlock(&c->xl);
1992/0407		qlock(&cp->xl);
1992/0403		if(waserror()){ qunlock(&c->xl);
1992/0407		qunlock(&cp->xl);
1992/0403		nexterror(); } /* * Wait till we get an output buffer
1992/0407		* Wait till we get an output buffer
1992/0403		*/ sleep(&c->xr, isobuf, c); p = enet.xn;
1992/0407		sleep(&cp->xr, isxfree, cp); p = cp->xpkt;
1992/0403		/* * copy message into buffer
1992/0406/sys/src/9/pc/devether.c:216,253 – 1992/0407/sys/src/9/pc/devether.c:227,255
1992/0403		} /* * pad the packet (zero the pad)
1992/0407		* pad the packet (zero the pad)
1992/0403		*/ if(len < ETHERMINTU){ memset(((char*)p)+len, 0, ETHERMINTU-len); len = ETHERMINTU; } enet.xn->len = len; /* * give packet a local address
1992/0407		* give packet a local address
1992/0403		*/ memmove(p->s, enet.ea, sizeof(enet.ea));
1992/0407		memmove(p->s, cp->ea, sizeof(cp->ea));
1992/0403		/* * give to Chip
1992/0407		* start the transmission
1992/0403		*/ splhi(); /* sync with interrupt routine */ enet.xn->owner = Chip; if(enet.xmting == 0) ethersend(enet.xn); spllo();
1992/0407		outb(cp->iobase+Tbcr0, len & 0xFF); outb(cp->iobase+Tbcr1, (len>>8) & 0xFF); outb(cp->iobase+Cr, 0x26); /* Page0|TXP|STA */ cp->xbusy = 1;
1992/0403		/* * send */ enet.xn = XSUCC(enet.xn); freeb(bp); qunlock(&enet.xl);
1992/0407		qunlock(&cp->xl);
1992/0403		poperror();                  enet.outpackets++;
1992/0404		#endif
1992/0403		} /*
1992/0406/sys/src/9/pc/devether.c:370,376 – 1992/0407/sys/src/9/pc/devether.c:372,379
1992/0404		if(isr & Ptx) cp->outpackets++; if(isr & (Txe|Ptx)){ panic("tx intr\n");
1992/0407		cp->xbusy = 0; wakeup(&cp->xr);
1992/0404		} /* * the receive ring is full.
1992/0406/sys/src/9/pc/devether.c:422,427 – 1992/0407/sys/src/9/pc/devether.c:425,431
1992/0404		outb(cp->iobase+Tcr, 0x20); /* LB0 */ outb(cp->iobase+Bnry, 6); cp->bnry = 6;
1992/0407		cp->ring = (Ring*)(KZERO|RAMbase);
1992/0404		outb(cp->iobase+Pstart, 6); /* 6*256 */ outb(cp->iobase+Pstop, 32); /* 8*1024/256 */ outb(cp->iobase+Isr, 0xFF);
1992/0406/sys/src/9/pc/devether.c:435,440 – 1992/0407/sys/src/9/pc/devether.c:439,445
1992/0404		outb(cp->iobase+Cr, 0x22); /* Page0, RD2|STA */ outb(cp->iobase+Tpsr, 0);
1992/0407		cp->xpkt = (Etherpkt*)(KZERO|RAMbase);
1992/0403		} void
1992/0406/sys/src/9/pc/devether.c:556,569 – 1992/0407/sys/src/9/pc/devether.c:561,573
1992/0406		/* * process any received packets */ bnry = inb(cp->iobase+Bnry); while(bnry != cp->curr){ rp = &((Ring*)RAMbase)[bnry]; printpkt(bnry, rp->len, (Etherpkt*)rp->data);
1992/0407		cp->bnry = inb(cp->iobase+Bnry); while(cp->bnry != cp->curr){ rp = &cp->ring[cp->bnry];
1992/0406		cp->inpackets++; etherup(cp, (Etherpkt*)rp->data, rp->len-4); bnry = rp->next; outb(cp->iobase+Bnry, bnry);
1992/0407		etherup(cp, (Etherpkt*)rp->data, ((rp->len1<<8)+rp->len0)-4); cp->bnry = rp->next; outb(cp->iobase+Bnry, cp->bnry);
1992/0406		} /* * if we idled input because of overflow,
1992/0406/sys/src/9/pc/devether.c:572,577 – 1992/0407/sys/src/9/pc/devether.c:576,582
1992/0406		if(cp->ovw){ cp->ovw = 0; outb(cp->iobase+Tcr, 0);
1992/0407		wakeup(&cp->xr);
1992/0406		}
1992/0403		} }