/* * Isolan AT 4141-0 Ethernet driver * Isolink 4110 * * Copyright (c) 1994 Charles Hannum. * * Copyright (C) 1993, Paul Richards. This software may be used, modified, * copied, distributed, and sold, in both source and binary form provided * that the above copyright and these terms are retained. Under no * circumstances is the author responsible for the proper functioning * of this software, nor does the author assume any responsibility * for damages incurred with its use. * * $Id: if_is.c,v 1.23 1994/02/16 20:22:16 mycroft Exp $ */ /* TODO * 1) Advertise for more packets until all transmit buffers are full * 2) Add more of the timers/counters e.g. arpcom.opackets etc. */ #include "is.h" #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #ifdef NS #include #include #endif #if NBPFILTER > 0 #include #include #endif #include #include #include #include #include #include #define ETHER_MIN_LEN 64 #define ETHER_MAX_LEN 1518 #define ETHER_ADDR_LEN 6 char *card_type[] = {"unknown", "BICC Isolan", "NE2100"}; char *chip_type[] = {"unknown", "Am7990 LANCE", "Am79960 PCnet-ISA"}; /* * Ethernet software status per interface. * * Each interface is referenced by a network interface structure, * arpcom.ac_if, which the routing code uses to locate the interface. * This structure contains the output queue for the interface, its address, ... */ struct is_softc { struct device sc_dev; struct arpcom sc_arpcom; /* Ethernet common part */ u_short sc_iobase; /* IO base address of card */ u_short sc_rap, sc_rdp; int sc_chip, sc_card; struct init_block *sc_init; /* Lance initialisation block */ struct mds *sc_rd, *sc_td; u_char *sc_rbuf, *sc_tbuf; int sc_last_rd, sc_last_td; int sc_no_td; #ifdef ISDEBUG int sc_debug; #endif caddr_t sc_bpf; /* BPF "magic cookie" */ } is_softc[NIS]; int is_probe __P((struct isa_device *)); int ne2100_probe __P((struct isa_device *, struct is_softc *)); int bicc_probe __P((struct isa_device *, struct is_softc *)); int lance_probe __P((struct is_softc *)); int is_attach __P((struct isa_device *)); int isintr __P((int)); /* XXX can't be renamed till new interrupt code */ int is_ioctl __P((struct ifnet *, int, caddr_t)); int is_start __P((struct ifnet *)); int is_watchdog __P((/* short */)); void iswrcsr __P((/* struct is_softc *, u_short, u_short */)); u_short isrdcsr __P((/* struct is_softc *, u_short */)); void is_init __P((struct is_softc *)); void init_mem __P((struct is_softc *)); void is_reset __P((struct is_softc *)); void is_stop __P((struct is_softc *)); void is_tint __P((struct is_softc *)); void is_rint __P((struct is_softc *)); void is_read __P((/* struct is_softc *, u_char *, u_short */)); struct mbuf *is_get __P((u_char *, int, int, struct ifnet *)); #ifdef ISDEBUG void recv_print __P((struct is_softc *, int)); void xmit_print __P((struct is_softc *, int)); #endif void is_setladrf __P((struct arpcom *, u_long *)); struct isa_driver isdriver = { is_probe, is_attach, "is" }; struct trailer_header { u_short ether_type; u_short ether_residual; }; void iswrcsr(sc, port, val) struct is_softc *sc; u_short port; u_short val; { outw(sc->sc_rap, port); outw(sc->sc_rdp, val); } u_short isrdcsr(sc, port) struct is_softc *sc; u_short port; { outw(sc->sc_rap, port); return inw(sc->sc_rdp); } int is_probe(isa_dev) struct isa_device *isa_dev; { int unit = isa_dev->id_unit; register struct is_softc *sc = &is_softc[unit]; int nports; /* XXX HACK */ sprintf(sc->sc_dev.dv_xname, "%s%d", isdriver.name, isa_dev->id_unit); sc->sc_dev.dv_unit = isa_dev->id_unit; if (nports = bicc_probe(isa_dev, sc)) goto found; if (nports = ne2100_probe(isa_dev, sc)) goto found; return 0; found: /* * XXX - hopefully have better way to get dma'able memory later, * this code assumes that the physical memory address returned * from malloc will be below 16Mb. The Lance's address registers * are only 16 bits wide! */ #define MAXMEM ((NRBUF+NTBUF)*(BUFSIZE) + (NRBUF+NTBUF)*sizeof(struct mds) \ + sizeof(struct init_block) + 8) sc->sc_init = (struct init_block *)malloc(MAXMEM, M_TEMP, M_NOWAIT); if (!sc->sc_init) { printf("%s: couldn't allocate memory for card\n", sc->sc_dev.dv_xname); return 0; } /* * Make sure it's quadword aligned? This is kind of bogus, but * what the Hell... */ sc->sc_init += 8 - ((u_long)sc->sc_init & 7); return nports; } int ne2100_probe(isa_dev, sc) struct isa_device *isa_dev; struct is_softc *sc; { u_short iobase = isa_dev->id_iobase; int i; sc->sc_iobase = iobase; sc->sc_rap = iobase + NE2100_RAP; sc->sc_rdp = iobase + NE2100_RDP; sc->sc_card = NE2100; if (!(sc->sc_chip = lance_probe(sc))) return 0; /* * Extract the physical MAC address from the ROM. */ for (i = 0; i < ETHER_ADDR_LEN; i++) sc->sc_arpcom.ac_enaddr[i] = inb(iobase + i); return 24; } int bicc_probe(isa_dev, sc) struct isa_device *isa_dev; struct is_softc *sc; { u_short iobase = isa_dev->id_iobase; int i; sc->sc_iobase = iobase; sc->sc_rap = iobase + BICC_RAP; sc->sc_rdp = iobase + BICC_RDP; sc->sc_card = BICC; if (!(sc->sc_chip = lance_probe(sc))) return 0; /* * Extract the physical MAC address from the ROM. */ for (i = 0; i < ETHER_ADDR_LEN; i++) sc->sc_arpcom.ac_enaddr[i] = inb(iobase + (i * 2)); return 16; } /* * Determine which chip is present on the card. */ int lance_probe(sc) struct is_softc *sc; { int type; /* Stop the LANCE chip and put it in a known state. */ iswrcsr(sc, 0, STOP); DELAY(100); if (isrdcsr(sc, 0) != STOP) return 0; /* * Which bits are settable will depend on the type of chip. */ iswrcsr(sc, 3, PROBE_MASK); switch (isrdcsr(sc, 3)) { case LANCE_MASK: type = LANCE; break; case PCnet_ISA_MASK: type = PCnet_ISA; break; default: type = 0; break; } iswrcsr(sc, 3, 0); return type; } /* * Interface exists: make available by filling in network interface * record. System will initialize the interface when it is ready * to accept packets. We get the ethernet address here. */ int is_attach(isa_dev) struct isa_device *isa_dev; { struct is_softc *sc = &is_softc[isa_dev->id_unit]; struct ifnet *ifp = &sc->sc_arpcom.ac_if; struct ifaddr *ifa; struct sockaddr_dl *sdl; ifp->if_unit = sc->sc_dev.dv_unit; ifp->if_name = isdriver.name; ifp->if_mtu = ETHERMTU; ifp->if_output = ether_output; ifp->if_start = is_start; ifp->if_ioctl = is_ioctl; ifp->if_watchdog = is_watchdog; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; isa_dmacascade(isa_dev->id_drq); /* Attach the interface. */ if_attach(ifp); /* * Search down the ifa address list looking for the AF_LINK type entry. */ ifa = ifp->if_addrlist; while (ifa && ifa->ifa_addr) { if (ifa->ifa_addr->sa_family == AF_LINK) { /* * Fill in the link level address for this interface. */ sdl = (struct sockaddr_dl *)ifa->ifa_addr; sdl->sdl_type = IFT_ETHER; sdl->sdl_alen = ETHER_ADDR_LEN; sdl->sdl_slen = 0; bcopy(sc->sc_arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); break; } else ifa = ifa->ifa_next; } printf("%s: address %s, type %s %s\n", sc->sc_dev.dv_xname, ether_sprintf(sc->sc_arpcom.ac_enaddr), card_type[sc->sc_card], chip_type[sc->sc_chip]); #if NBPFILTER > 0 bpfattach(&sc->sc_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif } void is_reset(sc) struct is_softc *sc; { log(LOG_NOTICE, "%s: reset\n", sc->sc_dev.dv_xname); is_init(sc); } int is_watchdog(unit) short unit; { struct is_softc *sc = &is_softc[unit]; log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); ++sc->sc_arpcom.ac_if.if_oerrors; is_reset(sc); } /* Lance initialisation block set up. */ void init_mem(sc) struct is_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; int i; void *temp; /* * At this point we assume that the memory allocated to the Lance is * quadword aligned. If it isn't then the initialisation is going * fail later on. */ /* * Set up lance initialisation block. */ temp = (void *)sc->sc_init; temp += sizeof(struct init_block); sc->sc_rd = temp; temp += NRBUF * sizeof(struct mds); sc->sc_td = temp; temp += NTBUF * sizeof(struct mds); #if NBPFILTER > 0 if (ifp->if_flags & IFF_PROMISC) sc->sc_init->mode = PROM; else #endif sc->sc_init->mode = 0; for (i = 0; i < ETHER_ADDR_LEN; i++) sc->sc_init->padr[i] = sc->sc_arpcom.ac_enaddr[i]; is_setladrf(&sc->sc_arpcom, sc->sc_init->ladrf); sc->sc_init->rdra = kvtop(sc->sc_rd); sc->sc_init->rlen = ((kvtop(sc->sc_rd) >> 16) & 0xff) | (RLEN << 13); sc->sc_init->tdra = kvtop(sc->sc_td); sc->sc_init->tlen = ((kvtop(sc->sc_td) >> 16) & 0xff) | (TLEN << 13); /* * Set up receive ring descriptors. */ sc->sc_rbuf = temp; for (i = 0; i < NRBUF; i++) { sc->sc_rd[i].addr = kvtop(temp); sc->sc_rd[i].flags = ((kvtop(temp) >> 16) & 0xff) | OWN; sc->sc_rd[i].bcnt = -BUFSIZE; sc->sc_rd[i].mcnt = 0; temp += BUFSIZE; } /* * Set up transmit ring descriptors. */ sc->sc_tbuf = temp; for (i = 0; i < NTBUF; i++) { sc->sc_td[i].addr = kvtop(temp); sc->sc_td[i].flags= ((kvtop(temp) >> 16) & 0xff); sc->sc_td[i].bcnt = 0; sc->sc_td[i].mcnt = 0; temp += BUFSIZE; } } void is_stop(sc) struct is_softc *sc; { iswrcsr(sc, 0, STOP); } /* * Initialization of interface; set up initialization block * and transmit/receive descriptor rings. */ void is_init(sc) struct is_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; int s; register i; /* Address not known. */ if (!ifp->if_addrlist) return; s = splnet(); /* * Lance must be stopped to access registers. */ is_stop(sc); sc->sc_last_rd = sc->sc_last_td = sc->sc_no_td = 0; /* Set up lance's memory area. */ init_mem(sc); /* No byte swapping etc. */ iswrcsr(sc, 3, 0); /* Give lance the physical address of its memory area. */ iswrcsr(sc, 1, kvtop(sc->sc_init)); iswrcsr(sc, 2, (kvtop(sc->sc_init) >> 16) & 0xff); /* OK, let's try and initialise the Lance. */ iswrcsr(sc, 0, INIT); /* Wait for initialisation to finish. */ for (i = 0; i < 1000; i++) if (isrdcsr(sc, 0) & IDON) break; if (isrdcsr(sc, 0) & IDON) { /* Start the lance. */ iswrcsr(sc, 0, STRT | IDON | INEA); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; is_start(ifp); } else printf("%s: card failed to initialise\n", sc->sc_dev.dv_xname); (void) splx(s); } /* * Setup output on interface. * Get another datagram to send off of the interface queue, and map it to the * interface before starting the output. * Called only at splimp or interrupt level. */ int is_start(ifp) struct ifnet *ifp; { register struct is_softc *sc = &is_softc[ifp->if_unit]; struct mbuf *m0, *m; u_char *buffer; int len; int i; struct mds *cdm; if ((sc->sc_arpcom.ac_if.if_flags ^ IFF_RUNNING) & (IFF_RUNNING | IFF_OACTIVE)) return; outloop: if (++sc->sc_no_td > NTBUF) { sc->sc_no_td = NTBUF; sc->sc_arpcom.ac_if.if_flags |= IFF_OACTIVE; #ifdef ISDEBUG if (sc->sc_debug) printf("no_td = %x, last_td = %x\n", sc->sc_no_td, sc->sc_last_td); #endif return; } cdm = &sc->sc_td[sc->sc_last_td]; #if 0 /* XXX redundant */ if (cdm->flags & OWN) return; #endif IF_DEQUEUE(&sc->sc_arpcom.ac_if.if_snd, m); if (!m) return; /* * Copy the mbuf chain into the transmit buffer. */ buffer = sc->sc_tbuf + (BUFSIZE * sc->sc_last_td); len = 0; for (m0 = m; m; m = m->m_next) { bcopy(mtod(m, caddr_t), buffer, m->m_len); buffer += m->m_len; len += m->m_len; } #if NBPFILTER > 0 if (sc->sc_bpf) { u_short etype; int off, datasize, resid; struct ether_header *eh; struct trailer_header trailer_header; char ether_packet[ETHER_MAX_LEN]; char *ep; ep = ether_packet; /* * We handle trailers below: * Copy ether header first, then residual data, then data. Put * all this in a temporary buffer 'ether_packet' and send off * to bpf. Since the system has generated this packet, we * assume that all of the offsets in the packet are correct; if * they're not, the system will almost certainly crash in * m_copydata. We make no assumptions about how the data is * arranged in the mbuf chain (i.e. how much data is in each * mbuf, if mbuf clusters are used, etc.), which is why we use * m_copydata to get the ether header rather than assume that * this is located in the first mbuf. */ /* Copy ether header. */ m_copydata(m0, 0, sizeof(struct ether_header), ep); eh = (struct ether_header *) ep; ep += sizeof(struct ether_header); etype = ntohs(eh->ether_type); if (etype >= ETHERTYPE_TRAIL && etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { datasize = (etype - ETHERTYPE_TRAIL) << 9; off = datasize + sizeof(struct ether_header); /* Copy trailer_header into a data structure. */ m_copydata(m0, off, sizeof(struct trailer_header), &trailer_header.ether_type); /* Copy residual data. */ m_copydata(m0, off + sizeof(struct trailer_header), resid = ntohs(trailer_header.ether_residual) - sizeof(struct trailer_header), ep); ep += resid; /* Copy data. */ m_copydata(m0, sizeof(struct ether_header), datasize, ep); ep += datasize; /* Restore original ether packet type. */ eh->ether_type = trailer_header.ether_type; bpf_tap(sc->sc_bpf, ether_packet, ep - ether_packet); } else bpf_mtap(sc->sc_bpf, m0); } #endif m_freem(m0); len = max(len, ETHER_MIN_LEN); /* * Init transmit registers, and set transmit start flag. */ cdm->flags |= OWN | STP | ENP; cdm->bcnt = -len; cdm->mcnt = 0; #ifdef ISDEBUG if (sc->sc_debug) xmit_print(sc, sc->sc_last_td); #endif iswrcsr(sc, 0, TDMD | INEA); if (++sc->sc_last_td >= NTBUF) sc->sc_last_td = 0; /* possible more packets */ goto outloop; } /* * Controller interrupt. */ int isintr(unit) { register struct is_softc *sc = &is_softc[unit]; u_short isr; isr = isrdcsr(sc, 0); if ((isr & INTR) == 0) return 0; do { if (isr & ERR) { if (isr & BABL){ printf("%s: BABL\n", sc->sc_dev.dv_xname); sc->sc_arpcom.ac_if.if_oerrors++; } if (isr & CERR) { printf("%s: CERR\n", sc->sc_dev.dv_xname); sc->sc_arpcom.ac_if.if_collisions++; } if (isr & MISS) { printf("%s: MISS\n", sc->sc_dev.dv_xname); sc->sc_arpcom.ac_if.if_ierrors++; } if (isr & MERR) printf("%s: MERR\n", sc->sc_dev.dv_xname); iswrcsr(sc, 0, BABL | CERR | MISS | MERR | INEA); } if ((isr & RXON) == 0) { printf("%s: !RXON\n", sc->sc_dev.dv_xname); sc->sc_arpcom.ac_if.if_ierrors++; is_reset(sc); return 1; } if ((isr & TXON) == 0) { printf("%s: !TXON\n", sc->sc_dev.dv_xname); sc->sc_arpcom.ac_if.if_oerrors++; is_reset(sc); return 1; } if (isr & RINT) { /* Reset watchdog timer. */ sc->sc_arpcom.ac_if.if_timer = 0; is_rint(sc); } if (isr & TINT) { /* Reset watchdog timer. */ sc->sc_arpcom.ac_if.if_timer = 0; iswrcsr(sc, 0, TINT | INEA); is_tint(sc); } isr = isrdcsr(sc, 0); } while (isr & INTR); return 1; } void is_tint(sc) struct is_softc *sc; { register struct ifnet *ifp = &sc->sc_arpcom.ac_if; int i, loopcount=0; struct mds *cdm; do { if ((i = sc->sc_last_td - sc->sc_no_td) < 0) i += NTBUF; cdm = &sc->sc_td[i]; #ifdef ISDEBUG if (sc->sc_debug) printf("trans cdm = %x\n", cdm); #endif if (cdm->flags & OWN) { if (loopcount) break; return; } loopcount++; sc->sc_arpcom.ac_if.if_opackets++; sc->sc_arpcom.ac_if.if_flags &= ~IFF_OACTIVE; } while (--sc->sc_no_td > 0); is_start(ifp); } #define NEXTRDS \ if (++rmd == NRBUF) rmd=0, cdm=sc->sc_rd; else ++cdm /* only called from one place, so may as well integrate */ void is_rint(sc) struct is_softc *sc; { register int rmd = sc->sc_last_rd; struct mds *cdm = &sc->sc_rd[rmd]; /* Out of sync with hardware, should never happen */ if (cdm->flags & OWN) { printf("%s: error: out of sync\n", sc->sc_dev.dv_xname); iswrcsr(sc, 0, RINT|INEA); return; } /* Process all buffers with valid data. */ while ((cdm->flags & OWN) == 0) { /* Clear interrupt to avoid race condition. */ iswrcsr(sc, 0, RINT | INEA); if (cdm->flags & ERR) { if (cdm->flags & FRAM) printf("%s: FRAM\n", sc->sc_dev.dv_xname); if (cdm->flags & OFLO) printf("%s: OFLO\n", sc->sc_dev.dv_xname); if (cdm->flags & CRC) printf("%s: CRC\n", sc->sc_dev.dv_xname); if (cdm->flags & RBUFF) printf("%s: RBUFF\n", sc->sc_dev.dv_xname); } else if (cdm->flags & (STP | ENP) != (STP | ENP)) { do { iswrcsr(sc, 0, RINT | INEA); cdm->mcnt = 0; cdm->flags |= OWN; NEXTRDS; } while ((cdm->flags & (OWN | ERR | STP | ENP)) == 0); sc->sc_last_rd = rmd; printf("%s: chained buffer\n", sc->sc_dev.dv_xname); if ((cdm->flags & (OWN | ERR | STP | ENP)) != ENP) { is_reset(sc); return; } } else { #ifdef ISDEBUG if (sc->sc_debug) recv_print(sc, sc->sc_last_rd); #endif is_read(sc, sc->sc_rbuf + (BUFSIZE*rmd), (int)cdm->mcnt); sc->sc_arpcom.ac_if.if_ipackets++; } cdm->flags |= OWN; cdm->mcnt = 0; NEXTRDS; #ifdef ISDEBUG if (sc->sc_debug) printf("sc->sc_last_rd = %x, cdm = %x\n", sc->sc_last_rd, cdm); #endif } /* while */ sc->sc_last_rd = rmd; } /* is_rint */ /* * Pass a packet to the higher levels. * We deal with the trailer protocol here. */ void is_read(sc, buf, len) struct is_softc *sc; u_char *buf; u_short len; { struct ether_header *eh; struct mbuf *m; u_short off; int resid; u_short etype; /* * Deal with trailer protocol: if type is trailer type * get true type from first 16-bit word past data. * Remember that type was trailer by setting off. */ eh = (struct ether_header *)buf; etype = ntohs(eh->ether_type); len -= sizeof(struct ether_header) + 4; #define nedataaddr(eh, off, type) ((type)(((caddr_t)((eh)+1)+(off)))) if (etype >= ETHERTYPE_TRAIL && etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { off = (etype - ETHERTYPE_TRAIL) << 9; if ((off + sizeof(struct trailer_header)) > len) return; eh->ether_type = *nedataaddr(eh, off, u_short *); resid = ntohs(*(nedataaddr(eh, off+2, u_short *))); if (off + resid > len) return; len = off + resid; } else off = 0; if (len == 0) return; /* * Pull packet off interface. Off is nonzero if packet has trailing * header; is_get will then force this header information to be at the * front, but we still have to drop the type and length which are at * the front of any trailer data. */ m = is_get(buf, len, off, &sc->sc_arpcom.ac_if); if (m == 0) return; #if NBPFILTER > 0 /* * Check if there's a BPF listener on this interface. * If so, hand off the raw packet to bpf. */ if (sc->sc_bpf) { bpf_mtap(sc->sc_bpf, m); /* * Note that the interface cannot be in promiscuous mode if * there are no BPF listeners. And if we are in promiscuous * mode, we have to check if this packet is really ours. * * XXX This test does not support multicasts. */ if ((sc->sc_arpcom.ac_if.if_flags & IFF_PROMISC) && (eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */ bcmp(eh->ether_dhost, sc->sc_arpcom.ac_enaddr, sizeof(eh->ether_dhost)) != 0) { m_freem(m); return; } } #endif ether_input(&sc->sc_arpcom.ac_if, eh, m); } /* * Supporting routines */ /* * Pull read data off a interface. * Len is length of data, with local net header stripped. * Off is non-zero if a trailer protocol was used, and * gives the offset of the trailer information. * We copy the trailer information and then all the normal * data into mbufs. When full cluster sized units are present * we copy into clusters. */ struct mbuf * is_get(buf, totlen, off0, ifp) u_char *buf; int totlen, off0; struct ifnet *ifp; { struct mbuf *top, **mp, *m, *p; int off = off0, len; register caddr_t cp = buf; char *epkt; buf += sizeof(struct ether_header); cp = buf; epkt = cp + totlen; if (off) { cp += off + 2 * sizeof(u_short); totlen -= 2 * sizeof(u_short); } MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == 0) return 0; m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = totlen; m->m_len = MHLEN; top = 0; mp = ⊤ while (totlen > 0) { if (top) { MGET(m, M_DONTWAIT, MT_DATA); if (m == 0) { m_freem(top); return 0; } m->m_len = MLEN; } len = min(totlen, epkt - cp); if (len >= MINCLSIZE) { MCLGET(m, M_DONTWAIT); if (m->m_flags & M_EXT) m->m_len = len = min(len, MCLBYTES); else len = m->m_len; } else { /* * Place initial small packet/header at end of mbuf. */ if (len < m->m_len) { if (top == 0 && len + max_linkhdr <= m->m_len) m->m_data += max_linkhdr; m->m_len = len; } else len = m->m_len; } bcopy(cp, mtod(m, caddr_t), (unsigned)len); cp += len; *mp = m; mp = &m->m_next; totlen -= len; if (cp == epkt) cp = buf; } return top; } /* * Process an ioctl request. */ int is_ioctl(ifp, cmd, data) struct ifnet *ifp; int cmd; caddr_t data; { struct is_softc *sc = &is_softc[ifp->if_unit]; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; s = splnet(); switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: is_init(sc); /* before arpwhohas */ /* * See if another station has *our* IP address. * i.e.: There is an address conflict! If a * conflict exists, a message is sent to the * console. */ sc->sc_arpcom.ac_ipaddr = IA_SIN(ifa)->sin_addr; arpwhohas(&sc->sc_arpcom, &IA_SIN(ifa)->sin_addr); break; #endif #ifdef NS /* XXX - This code is probably wrong. */ case AF_NS: { register struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; if (ns_nullhost(*ina)) ina->x_host = *(union ns_host *)(sc->sc_arpcom.ac_enaddr); else { /* * */ bcopy(ina->x_host.c_host, sc->sc_arpcom.ac_enaddr, sizeof(sc->sc_arpcom.ac_enaddr)); } /* Set new address. */ is_init(sc); break; } #endif default: is_init(sc); break; } break; case SIOCSIFFLAGS: /* * If interface is marked down and it is running, then stop it */ if ((ifp->if_flags & IFF_UP) == 0 && (ifp->if_flags & IFF_RUNNING) != 0) { /* * If interface is marked down and it is running, then * stop it. */ is_stop(sc); ifp->if_flags &= ~IFF_RUNNING; } else if ((ifp->if_flags & IFF_UP) != 0 && (ifp->if_flags & IFF_RUNNING) == 0) { /* * If interface is marked up and it is stopped, then * start it. */ is_init(sc); } else { /* * Reset the interface to pick up changes in any other * flags that affect hardware registers. */ /*is_stop(sc);*/ is_init(sc); } #ifdef ISDEBUG if (ifp->if_flags & IFF_DEBUG) sc->sc_debug = 1; else sc->sc_debug = 0; #endif break; case SIOCADDMULTI: case SIOCDELMULTI: error = (cmd == SIOCADDMULTI) ? ether_addmulti(ifr, &sc->sc_arpcom): ether_delmulti(ifr, &sc->sc_arpcom); if (error == ENETRESET) { /* * Multicast list has changed; set the hardware filter * accordingly. */ is_init(sc); error = 0; } break; #ifdef notdef case SIOCGHWADDR: bcopy(sc->sc_arpcom.ac_enaddr, &ifr->ifr_data, sizeof(sc->sc_arpcom.ac_enaddr)); break; #endif default: error = EINVAL; } (void) splx(s); return error; } #ifdef ISDEBUG void recv_print(sc, no) struct is_softc *sc; int no; { struct mds *rmd; int i, printed = 0; u_short len; rmd = &sc->sc_rd[no]; len = rmd->mcnt; printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no, len); printf("%s: status %x\n", sc->sc_dev.dv_xname, isrdcsr(sc, 0)); for (i = 0; i < len; i++) { if (!printed) { printed = 1; printf("%s: data: ", sc->sc_dev.dv_xname); } printf("%x ", *(sc->sc_rbuf + (BUFSIZE*no) + i)); } if (printed) printf("\n"); } void xmit_print(sc, no) struct is_softc *sc; int no; { struct mds *rmd; int i, printed=0; u_short len; rmd = &sc->sc_td[no]; len = -rmd->bcnt; printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no, len); printf("%s: status %x\n", sc->sc_dev.dv_xname, isrdcsr(sc, 0)); printf("%s: addr %x, flags %x, bcnt %x, mcnt %x\n", sc->sc_dev.dv_xname, rmd->addr, rmd->flags, rmd->bcnt, rmd->mcnt); for (i = 0; i < len; i++) { if (!printed) { printed = 1; printf("%s: data: ", sc->sc_dev.dv_xname); } printf("%x ", *(sc->sc_tbuf + (BUFSIZE*no) + i)); } if (printed) printf("\n"); } #endif /* ISDEBUG */ /* * Set up the logical address filter. */ void is_setladrf(ac, af) struct arpcom *ac; u_long *af; { struct ifnet *ifp = &ac->ac_if; struct ether_multi *enm; register u_char *cp, c; register u_long crc; register int i, len; struct ether_multistep step; /* * Set up multicast address filter by passing all multicast addresses * through a crc generator, and then using the high order 6 bits as an * index into the 64 bit logical address filter. The high order bit * selects the word, while the rest of the bits select the bit within * the word. */ if (ifp->if_flags & IFF_PROMISC) { ifp->if_flags |= IFF_ALLMULTI; af[0] = af[1] = 0xffffffff; return; } af[0] = af[1] = 0; ETHER_FIRST_MULTI(step, ac, enm); while (enm != NULL) { if (bcmp(enm->enm_addrlo, enm->enm_addrhi, sizeof(enm->enm_addrlo)) != 0) { /* * We must listen to a range of multicast addresses. * For now, just accept all multicasts, rather than * trying to set only those filter bits needed to match * the range. (At this time, the only use of address * ranges is for IP multicast routing, for which the * range is big enough to require all bits set.) */ ifp->if_flags |= IFF_ALLMULTI; af[0] = af[1] = 0xffffffff; return; } cp = enm->enm_addrlo; crc = 0xffffffff; for (len = sizeof(enm->enm_addrlo); --len >= 0;) { c = *cp++; for (i = 8; --i >= 0;) { if (((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01)) { crc <<= 1; crc ^= 0x04c11db6 | 1; } else crc <<= 1; c >>= 1; } } /* Just want the 6 most significant bits. */ crc >>= 26; /* Turn on the corresponding bit in the filter. */ af[crc >> 5] |= 1 << ((crc & 0x1f) ^ 24); ETHER_NEXT_MULTI(step, enm); } ifp->if_flags &= ~IFF_ALLMULTI; }