1994/0713/pc/devether.c (diff list | history)

pc/devether.c on 1992/0403
1992/0403		#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h"
1993/1113		#include "ureg.h" #include "../port/error.h" #include "../port/netif.h"
1992/0403
1993/1113		#include "etherif.h"
1992/1222
1993/1113		static Ether *ether[MaxEther];
1992/0403
1993/1113		void etherinit(void) { }
1992/1222
1993/1113		Chan* etherattach(char *spec) { ulong ctlrno; char *p; Chan *c;
1992/0404
1993/1113		ctlrno = 0; if(spec && *spec){ ctlrno = strtoul(spec, &p, 0); if((ctlrno == 0 && p == spec) || *p || (ctlrno >= MaxEther)) error(Ebadarg); } if(ether[ctlrno] == 0) error(Enodev);
1992/0403
1993/1113		c = devattach('l', spec); c->dev = ctlrno; if(ether[ctlrno]->attach) (*ether[ctlrno]->attach)(ether[ctlrno]); return c; }
1992/0922
1992/0425		Chan*
1992/0424		etherclone(Chan *c, Chan *nc)
1992/0411		{
1992/0424		return devclone(c, nc); }
1992/0411
1992/0424		int etherwalk(Chan *c, char *name) {
1993/1113		return netifwalk(ether[c->dev], c, name);
1992/0424		} void etherstat(Chan *c, char *dp) {
1993/1113		netifstat(ether[c->dev], c, dp);
1992/0424		} Chan* etheropen(Chan *c, int omode) {
1993/1113		return netifopen(ether[c->dev], c, omode);
1992/0424		} void ethercreate(Chan *c, char *name, int omode, ulong perm) {
1992/0711		USED(c, name, omode, perm);
1992/0424		} void etherclose(Chan *c) {
1993/1113		netifclose(ether[c->dev], c);
1992/0424		} long
1993/1113		etherread(Chan *c, void *buf, long n, ulong offset)
1992/0424		{
1993/1113		return netifread(ether[c->dev], c, buf, n, offset);
1992/0411		}
1992/0424		void etherremove(Chan *c) {
1992/0711		USED(c);
1992/0424		} void etherwstat(Chan *c, char *dp) {
1993/1113		netifwstat(ether[c->dev], c, dp);
1992/0424		}
1993/1120		void
1994/0702		etherrloop(Ether *ctlr, Etherpkt *pkt, long len, int tome)
1993/1120		{ ushort type; Netfile *f, **fp, **ep; type = (pkt->type[0]<<8)|pkt->type[1]; ep = &ctlr->f[Ntypes]; for(fp = ctlr->f; fp < ep; fp++){
1994/0702		if((f = *fp) && ((tome && f->type==type) || f->type < 0))
1994/0202		qproduce(f->in, pkt->d, len);
1993/1120		} } static int etherwloop(Ether *ctlr, Etherpkt *pkt, long len) {
1994/0702		int s, tome, bcast;
1993/1120
1994/0702		tome = memcmp(pkt->d, ctlr->ea, sizeof(pkt->d)) == 0; bcast = memcmp(pkt->d, ctlr->bcast, sizeof(pkt->d)) == 0; if(!tome && !bcast && ctlr->prom==0 && ctlr->all==0)
1993/1120		return 0; s = splhi();
1994/0702		etherrloop(ctlr, pkt, len, tome||bcast);
1993/1120		splx(s);
1994/0702		return tome;
1993/1120		}
1993/1113		long etherwrite(Chan *c, void *buf, long n, ulong offset)
1992/0407		{
1993/1113		Ether *ctlr;
1992/0407
1993/1113		USED(offset); if(n > ETHERMAXTU) error(Ebadarg); ctlr = ether[c->dev];
1992/0407
1993/1113		if(NETTYPE(c->qid.path) != Ndataqid) return netifwrite(ctlr, c, buf, n);
1992/0403
1993/1120		if(etherwloop(ctlr, buf, n)) return n;
1992/1222		qlock(&ctlr->tlock);
1992/0403		if(waserror()){
1992/1222		qunlock(&ctlr->tlock);
1992/0403		nexterror(); }
1993/1113		n = (*ctlr->write)(ctlr, buf, n);
1992/0403		poperror();
1993/1113		qunlock(&ctlr->tlock);
1992/0403
1993/1113		return n;
1992/0403		}
1993/1113		static struct { char *type; int (*reset)(Ether*);
1993/1119		} cards[MaxEther+1];
1992/0403
1993/1113		void addethercard(char *t, int (*r)(Ether*))
1992/0403		{
1993/1113		static int ncard;
1992/0403
1993/1119		if(ncard == MaxEther)
1993/1113		panic("too many ether cards"); cards[ncard].type = t; cards[ncard].reset = r; ncard++;
1992/0403		}
1992/0424		void etherreset(void) {
1993/1113		Ether *ctlr; int i, n, ctlrno;
1992/0410
1993/1113		for(ctlr = 0, ctlrno = 0; ctlrno < MaxEther; ctlrno++){ if(ctlr == 0) ctlr = malloc(sizeof(Ether)); memset(ctlr, 0, sizeof(Ether)); if(isaconfig("ether", ctlrno, ctlr) == 0) continue; for(n = 0; cards[n].type; n++){ if(strcmp(cards[n].type, ctlr->type)) continue; if((*cards[n].reset)(ctlr)) break;
1992/1222		/* * IRQ2 doesn't really exist, it's used to gang the interrupt * controllers together. A device set to IRQ2 will appear on * the second interrupt controller as IRQ9. */
1993/1113		if(ctlr->irq == 2) ctlr->irq = 9;
1994/0713		setvec(Int0vec+ctlr->irq, ctlr->interrupt, ctlr);
1993/0212
1993/1113		print("ether%d: %s: port %lux irq %d addr %lux size %d:", ctlrno, ctlr->type, ctlr->port, ctlr->irq, ctlr->mem, ctlr->size); for(i = 0; i < sizeof(ctlr->ea); i++) print(" %2.2ux", ctlr->ea[i]); print("\n");
1993/0212
1993/1113		netifinit(ctlr, "ether", Ntypes, 32*1024); ctlr->alen = Eaddrlen; memmove(ctlr->addr, ctlr->ea, sizeof(ctlr->ea)); memmove(ctlr->bcast, etherbcast, sizeof(etherbcast));
1992/0410
1993/1113		ether[ctlrno] = ctlr; ctlr = 0;
1993/1120		break;
1993/1113		}
1992/0403		}
1993/1113		if(ctlr) free(ctlr);
1992/0403		}