/* * Copyright (c) 1994 Timo Rossi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Timo Rossi * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $Id: if_ed.c,v 1.2 1994/07/26 17:51:19 chopps Exp $ */ /* * Driver for the Hydra Systems ethernet card * written by Timo Rossi , * somewhat based on Amiga if_le.c and i386 if_ed.c * * 01.07.1994 TR -- First working version * 03.07.1994 TR -- Now he_put() should work with odd length mbufs. * (currently uses an extra buffer/extra memory copy) * 13.07.1994 TR -- Some little optimizations... * Now shouldn't crash the machine if a Hydra board * is not present. * 14.07.1994 TR -- Now shouldn't cause those NFS 'odd length' messages. * Optimized the transmit routine in case the whole * packet fits in one mbuf. * 14.07.1994 CH -- KNF and make it match the if_ed from i386 as mutch as * possible, without changing anything. */ #include "bpfilter.h" #include #include #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 /* XXX? */ /* * This currently uses only one transmit buffer * always located in the beginning of the card RAM. * the rest (or at least 16K that all Hydra cards have) * is used for receive buffers * */ #define ETHER_MIN_LEN 64 #define ETHER_MAX_LEN 1518 #define ETHER_ADDR_LEN 6 /* * Ethernet software status per interface * */ struct ed_softc { struct device sc_dev; struct arpcom sc_arpcom; /* Common ethernet structures */ u_char volatile *sc_base; u_char volatile *sc_nic_base; int sc_next_pkt; u_short sc_tx_page_start; u_short sc_rx_page_start; u_short sc_rx_page_stop; /* Add other fields as needed... -- TR */ #if NBPFILTER > 0 caddr_t sc_bpf; #endif }; /* prototypes */ int edmatch __P((struct device *, struct cfdata *, void *)); void edattach __P((struct device *, struct device *, void *)); void ed_init __P((struct ed_softc *)); void ed_reset __P((struct ed_softc *)); void ed_stop __P((struct ed_softc *)); int ed_start __P((struct ifnet *)); int ed_ioctl __P((struct ifnet *, int, caddr_t)); int ed_put __P((u_char volatile *, struct mbuf *)); struct cfdriver edcd = { NULL, "ed", edmatch, edattach, DV_IFNET, sizeof(struct ed_softc), }; /* * read/write 8390 NIC registers * */ void inline write_nic_reg(addr, data) u_char volatile *addr; int data; { *((u_char *)addr) = data; (void)ciaa.pra; } u_char inline read_nic_reg(addr) u_char volatile *addr; { register u_char val; val = *((u_char *)addr); (void) ciaa.pra; return (val); } int edmatch(pdp, cfp, auxp) struct device *pdp; struct cfdata *cfp; void *auxp; { struct ztwobus_args *zap; zap = auxp; if (zap->manid == 2121 && zap->prodid == 1) return (1); return (0); } void edattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { struct ztwobus_args *zap; struct ed_softc *sc; struct ifnet *ifp; int i, s; zap = auxp; sc = (struct ed_softc *)dp; ifp = &sc->sc_arpcom.ac_if; #ifdef ED_DEBUG printf("ed_attach(0x%x, 0x%x, 0x%x)\n", pdp, dp, auxp); #endif s = splhigh(); sc->sc_base = zap->va; sc->sc_nic_base = sc->sc_base + HYDRA_NIC_BASE; sc->sc_tx_page_start = 0; sc->sc_rx_page_start = 6; sc->sc_rx_page_stop = 64; /* * read the ethernet address from the board */ for(i = 0; i < ETHER_ADDR_LEN; i++) sc->sc_arpcom.ac_enaddr[i] = *((u_char *)(sc->sc_base + HYDRA_ADDRPROM + 2 * i)); printf(": hardware address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr)); splx(s); /* * set interface to stopped condition (reset) * XXX ed_stop(sc); */ ifp->if_unit = sc->sc_dev.dv_unit; ifp->if_name = edcd.cd_name; ifp->if_output = ether_output; ifp->if_start = ed_start; ifp->if_ioctl = ed_ioctl; /* ifp->if_watchdog = ed_watchdog */ ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; ifp->if_mtu = ETHERMTU; #if NBPFILTER > 0 bpfattach(&sc->sc_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif if_attach(ifp); ether_ifattach(ifp); } /* * Initialize device * */ void ed_init(sc) struct ed_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; int i, s; u_char command; u_long mcaf[2]; #ifdef ED_DEBUG printf("ed_init(0x%x)\n", sc); #endif /* Address not known. */ if(ifp->if_addrlist == 0) return; if((ifp->if_flags & IFF_RUNNING) == 0) { s = splimp(); ifp->if_flags |= IFF_RUNNING; ed_reset(sc); (void)ed_start(ifp); splx(s); } } /* * Reset the interface... * * this assumes that it is called inside a critical section... * */ void ed_reset(sc) struct ed_softc *sc; { int i, s; #ifdef ED_DEBUG printf("ed_reset(0x%x)\n", sc); #endif /* * Initialize NIC */ /* page0, softreset */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_NODMA | CR_STOP); /* * word transfer, 68k byteorder, no loopback, * fifo threshold 4 bytes (2 words) */ write_nic_reg(sc->sc_nic_base + NIC_DCR, DCR_WTS | DCR_BOS | DCR_LS | DCR_FT0); /* * clear remote byte count registers */ write_nic_reg(sc->sc_nic_base + NIC_RBCR0, 0); write_nic_reg(sc->sc_nic_base + NIC_RBCR1, 0); /* * accept broadcast, and use promiscuous mode if requested */ if(sc->sc_arpcom.ac_if.if_flags & IFF_PROMISC) write_nic_reg(sc->sc_nic_base + NIC_RCR, RCR_AB | RCR_PRO); else write_nic_reg(sc->sc_nic_base + NIC_RCR, RCR_AB); /* * enable loopback mode 1 */ write_nic_reg(sc->sc_nic_base + NIC_TCR, TCR_LB0); /* * initialize receive buffer ring */ write_nic_reg(sc->sc_nic_base + NIC_PSTART, sc->sc_rx_page_start); write_nic_reg(sc->sc_nic_base + NIC_PSTOP, sc->sc_rx_page_stop); write_nic_reg(sc->sc_nic_base + NIC_BNDRY, sc->sc_rx_page_start); /* * clear interrupts */ write_nic_reg(sc->sc_nic_base + NIC_ISR, 0xff); /* * enable interrupts (doesn't enable counter overflow interrupt) */ write_nic_reg(sc->sc_nic_base + NIC_IMR, ISR_PRX | ISR_PTX | ISR_RXE | ISR_TXE | ISR_OVW); /* * go to page 1 */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE1 | CR_NODMA | CR_STOP); /* * set physical ethernet address */ for(i = 0; i < ETHER_ADDR_LEN; i++) write_nic_reg(sc->sc_nic_base + NIC_PAR0 + 2 * i, sc->sc_arpcom.ac_enaddr[i]); sc->sc_next_pkt = sc->sc_rx_page_start + 1; write_nic_reg(sc->sc_nic_base + NIC_CURR, sc->sc_next_pkt); /* * go to page 0, start NIC */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_NODMA | CR_START); /* * clear interrupts again */ write_nic_reg(sc->sc_nic_base + NIC_ISR, 0xff); /* * take interface out of loopback */ write_nic_reg(sc->sc_nic_base + NIC_TCR, 0); sc->sc_arpcom.ac_if.if_flags |= IFF_RUNNING; sc->sc_arpcom.ac_if.if_flags &= ~IFF_OACTIVE; ed_start(&sc->sc_arpcom.ac_if); } /* * Take interface offline */ void ed_stop(sc) struct ed_softc *sc; { int n = 5000; /* Stop the interface */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_NODMA | CR_STOP); /* Wait until interface has entered stopped state (or timeout) */ while(((read_nic_reg(sc->sc_nic_base +NIC_ISR) & ISR_RST) == 0) && --n); } /* * Start output on interface. Get another datagram to send * off the interface queue, and copy it to the * interface becore starting the output * * this assumes that it is called inside a critical section... * */ int ed_start(ifp) struct ifnet *ifp; { struct ed_softc *sc = edcd.cd_devs[ifp->if_unit]; struct mbuf *m; int len, s; #ifdef ED_DEBUG printf("ed_start(0x%x)\n", ifp); #endif if((sc->sc_arpcom.ac_if.if_flags & IFF_RUNNING) == 0) return 0; IF_DEQUEUE(&sc->sc_arpcom.ac_if.if_snd, m); if(m == 0) return 0; #if NBPFILTER > 0 /* * If bpf is listening on this interface, let it * see the packet before we commit it to the wire * * (can't give the copy in Hydra card RAM to bpf, because * that RAM must always be accessed as words or longwords) * */ if(sc->sc_bpf) bpf_mtap(sc->sc_bpf, m); #endif len = ed_put(sc->sc_base + (sc->sc_tx_page_start << 8), m); /* * Really transmit a packet */ /* make sure we are on the correct page */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_START | CR_NODMA); /* set transmit page start */ write_nic_reg(sc->sc_nic_base + NIC_TPSR, sc->sc_tx_page_start); /* set packet length */ write_nic_reg(sc->sc_nic_base + NIC_TBCR0, len & 0xff); write_nic_reg(sc->sc_nic_base + NIC_TBCR1, len >> 8); /* actually transmit the packet */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_START | CR_NODMA | CR_TXP); sc->sc_arpcom.ac_if.if_flags |= IFF_OACTIVE; /* maybe add a transmit timeout timer... ?? */ return 0; } /* * Memory copy, copies word at time */ void inline word_copy(u_short *a, u_short *b, int len) { len /= 2; while(len--) *b++ = *a++; } /* * Copy packet from mbuf to the board memory * * Currently uses an extra buffer/extra memory copy, * unless the whole packet fits in one mbuf. * */ int ed_put(addr, m) u_char volatile *addr; struct mbuf *m; { struct mbuf *mp; int len, tlen; static u_short packet_buf[1536/2]; u_char *p; /* the whole packet in one mbuf? */ if(m->m_next == NULL) { tlen = m->m_len; word_copy(mtod(m, u_short *), (u_short *)addr, tlen+1); } else { for(p = (u_char *)packet_buf, tlen = 0, mp = m; mp; mp = mp->m_next) { if((len = mp->m_len) == 0) continue; tlen += len; bcopy(mtod(mp, u_char *), p, len); p += len; } if((len = tlen) & 1) len++; word_copy(packet_buf, (u_short *)addr, len); } m_freem(m); if(tlen < (ETHER_MIN_LEN-4)) { tlen = ETHER_MIN_LEN - 4; /* * should probably clear the rest of the packet * in the transmit buffer... */ } return (tlen); } /* * Copy packet from board RAM * * Trailers not (yet) supported * */ void ed_get_packet(sc, nic_ram_ptr, len) struct ed_softc *sc; u_short volatile *nic_ram_ptr; int len; { struct ether_header *eh; struct mbuf *m, *dst, *head = 0; int len1, amount; u_short *rec_buf_end = (u_short *)(sc->sc_base+(sc->sc_rx_page_stop<<8)); /* round the length to a word boundary */ len = (len + 1) & ~1; /* Allocate header mbuf */ MGETHDR(m, M_DONTWAIT, MT_DATA); if(m == 0) goto bad; m->m_pkthdr.rcvif = &sc->sc_arpcom.ac_if; m->m_pkthdr.len = len; m->m_len = 0; head = m; /* This should solve the NFS odd length packet problem... */ head->m_data += (((sizeof(struct ether_header) + 3) & ~3) - sizeof(struct ether_header)); eh = mtod(head, struct ether_header *); word_copy((u_short *)nic_ram_ptr, mtod(head, u_short *), sizeof(struct ether_header)); nic_ram_ptr += sizeof(struct ether_header)/2; head->m_len += sizeof(struct ether_header); len -= sizeof(struct ether_header); /* NOTE: nic_ram_ptr & rec_buf_end are u_short pointers */ while(len > 0) { if(nic_ram_ptr >= rec_buf_end) /* buffer pointer wrap */ nic_ram_ptr = (u_short *)(sc->sc_base + (sc->sc_rx_page_start << 8)); len1 = (rec_buf_end - nic_ram_ptr) * 2; if(len1 > len) len1 = len; amount = M_TRAILINGSPACE(m); if(amount == 0) { /* allocate another mbuf */ dst = m; MGET(m, M_DONTWAIT, MT_DATA); if(m == 0) goto bad; if(len1 >= MINCLSIZE) MCLGET(m, M_DONTWAIT); m->m_len = 0; dst->m_next = m; amount = M_TRAILINGSPACE(m); } if(amount < len1) len1 = amount; if(len1 & 1) printf("ed_get_packet() ERROR: odd len for wcopy()\n"); #ifdef ED_DEBUG printf("copying %d bytes (%d left)\n", len1, len - len1); #endif word_copy((u_short *)nic_ram_ptr, (u_short *)(mtod(m, caddr_t) + m->m_len), len1); m->m_len += len1; nic_ram_ptr += len1 / 2; len -= len1; } #if NBPFILTER > 0 if(sc->sc_bpf) { bpf_mtap(sc->sc_bpf, head); /* * The interface cannot be in promiscuous mode if there are * no BPF listeners. And in prom. mode we have to check * if the packet is really ours... */ if((sc->sc_arpcom.ac_if.if_flags & IFF_PROMISC) && (eh->ether_dhost[0] & 1) == 0 && /* not bcast or mcast */ bcmp(eh->ether_dhost, sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN) != 0) { m_freem(head); return; } } #endif m_adj(head, sizeof(struct ether_header)); ether_input(&sc->sc_arpcom.ac_if, eh, head); return; bad: if(head) m_freem(head); return; } /* * Ethernet interface receiver interrupt. */ void ed_rint(sc) struct ed_softc *sc; { u_short volatile *nic_ram_ptr; int boundary, hdr_next_pkt, len; /* select page1 to access the NIC_CURR register */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE1 | CR_START | CR_NODMA); while(sc->sc_next_pkt != read_nic_reg(sc->sc_nic_base + NIC_CURR)) { nic_ram_ptr = (u_short *)(sc->sc_base + (sc->sc_next_pkt << 8)); hdr_next_pkt = nic_ram_ptr[0]; hdr_next_pkt >>= 8; len = nic_ram_ptr[1]; len = (len >> 8) | ((len & 0xff) << 8); /* byte order fix */ #ifdef ED_DEBUG printf("hdr_next_pkt = 0x%x, packet length = %d\n", hdr_next_pkt, len); #endif if(len >= ETHER_MIN_LEN && len <= ETHER_MAX_LEN) { /* * note that nic_ram_ptr is u_short *, so * adding 2 actually adds 4 bytes. * CRC is not included in packet length */ ed_get_packet(sc, nic_ram_ptr+2, len-4); ++sc->sc_arpcom.ac_if.if_ipackets; } else { /* * Hmm... something is wrong... but this might also * happen when an oversized packet arrives... * but just reset the NIC */ log(LOG_ERR, "%s: NIC memory corrupt - invalid packet len %d\n", sc->sc_dev.dv_xname, len); ++sc->sc_arpcom.ac_if.if_ierrors; ed_reset(sc); return; } /* Update next packet pointer. */ sc->sc_next_pkt = hdr_next_pkt; /* * Update NIC boundary pointer - being careful to keep it one * buffer behind (as recommended by NS databook). */ boundary = sc->sc_next_pkt - 1; if(boundary < sc->sc_rx_page_start) boundary = sc->sc_rx_page_stop-1; #ifdef ED_DEBUG printf("new boundary value = %d\n", boundary); #endif /* set NIC to page 0 to update the NIC_BNDRY register */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_START | CR_NODMA); write_nic_reg(sc->sc_nic_base+NIC_BNDRY, boundary); /* select page1 to access the NIC_CURR register */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE1 | CR_START | CR_NODMA); } } /* * Our interrupt routine */ int edintr(unit) int unit; { struct ed_softc *sc = edcd.cd_devs[unit]; u_char isr; u_char xmit_flag; /* * If the driver has not been initialized, just return immediately * This also happens if there is no Hydra board present */ if (edcd.cd_devs == NULL || (sc = edcd.cd_devs[unit]) == NULL) return (0); xmit_flag = 0; /* Set NIC to page 0 registers. */ write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_START | CR_NODMA); /* get interrupt status */ isr = read_nic_reg(sc->sc_nic_base + NIC_ISR) & 0x7f; if(!isr) return 0; #ifdef ED_DEBUG printf("ed_intr(0x%x), isr 0x%x\n", sc, isr); #endif /* Loop until there are no more new interrupts. */ for (;;) { /* * Reset all the bits that we are 'acknowledging' by writing a * '1' to each bit position that was set. * (Writing a '1' *clears* the bit.) */ write_nic_reg(sc->sc_nic_base + NIC_ISR, isr); /* * Handle transmitter interrupts. Handle these first because * the receiver will reset the board under some conditions. */ if(isr & (ISR_PTX | ISR_TXE)) { u_char collisions; collisions = read_nic_reg(sc->sc_nic_base + NIC_NCR) & 0x0f; /* * Check for transmit error. If a TX completed with an * error, we end up throwing the packet away. Really * the only error that is possible is excessive * collisions, and in this case it is best to allow the * automatic mechanisms of TCP to backoff the flow. Of * course, with UDP we're screwed, but this is expected * when a network is heavily loaded. */ (void)read_nic_reg(sc->sc_nic_base+NIC_TSR); if(isr & ISR_TXE) { /* * Excessive collisions (16). */ if((read_nic_reg(sc->sc_nic_base+NIC_TSR) & TSR_ABT) && collisions == 0) collisions = 16; /* Update output errors counter. */ sc->sc_arpcom.ac_if.if_oerrors++; } else { /* * Update total number of successfully * transmitted packets. */ sc->sc_arpcom.ac_if.if_opackets++; } #ifdef ED_DEBUG printf("transmit complete, collisions = %d\n", collisions); #endif sc->sc_arpcom.ac_if.if_flags &= ~IFF_OACTIVE; sc->sc_arpcom.ac_if.if_collisions += collisions; xmit_flag = 1; } /* Handle receiver interrupts. */ if(isr & (ISR_PRX | ISR_RXE | ISR_OVW)) { /* * Overwrite warning. In order to make sure that a * lockup of the local DMA hasn't occurred, we reset * and re-init the NIC. The NSC manual suggests only a * partial reset/re-init is necessary - but some chips * seem to want more. The DMA lockup has been seen * only with early rev chips - Methinks this bug was * fixed in later revs. -DG * * not currently doing DMA methinks - CH. */ if(isr & ISR_OVW) { ++sc->sc_arpcom.ac_if.if_ierrors; #ifdef DIAGNOSTIC log(LOG_WARNING, "%s: warning - receiver ring buf overrun\n", sc->sc_dev.dv_xname); #endif /* Stop/reset/re-init NIC. */ ed_reset(sc); } else { /* * Receiver Error. One or more of: CRC error, * frame alignment error FIFO overrun, or * missed packet. */ if(isr & ISR_RXE) { ++sc->sc_arpcom.ac_if.if_ierrors; #ifdef ED_DEBUG printf("%s: receive error %x\n", sc->sc_dev.dv_xname, read_nic_reg(sc->sc_nic_base + NIC_RSR)); #endif } else /* packet received ok */ ed_rint(sc); } } if(xmit_flag) ed_start(&sc->sc_arpcom.ac_if); write_nic_reg(sc->sc_nic_base + NIC_CR, CR_PAGE0 | CR_START | CR_NODMA); /* * If the Network Talley Counters overflow, read them to reset * them. It appears that old 8390's won't clear the ISR flag * otherwise - resulting in an infinite loop. */ if(isr & ISR_CNT) { (void)read_nic_reg(sc->sc_nic_base+NIC_CNTR0); (void)read_nic_reg(sc->sc_nic_base+NIC_CNTR1); (void)read_nic_reg(sc->sc_nic_base+NIC_CNTR2); } isr = read_nic_reg(sc->sc_nic_base+NIC_ISR) & 0x7f; if (!isr) return 1; } } /* * Process an ioctl request. This code needs some work - it looks pretty ugly. */ int ed_ioctl(ifp, command, data) register struct ifnet *ifp; int command; caddr_t data; { struct ed_softc *sc = edcd.cd_devs[ifp->if_unit]; register struct ifaddr *ifa = (struct ifaddr *)data; int s, error = 0; s = splimp(); #ifdef ED_DEBUG printf("he_ioctl() called, cmd = 0x%x\n", cmd); #endif switch(command) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch(ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: ed_init(sc); /* before arpwhohas */ ((struct arpcom *)ifp)->ac_ipaddr = IA_SIN(ifa)->sin_addr; arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); break; #endif #ifdef NS /* XXX - This code is probably wrong. */ case AF_NS: { struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); if(ns_nullhost(*ina)) ina->x_host = *(union ns_host *)(sc->sc_arpcom.sc_enaddr); else { bcopy(ina->x_host.c_host, sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN); } ed_init(sc); break; } #endif default: ed_init(sc); break; } case SIOCSIFFLAGS: 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. */ ed_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. */ ed_init(sc); } else { /* * Reset the interface to pick up changes in any other * flags that affect hardware registers. */ ed_stop(sc); ed_init(sc); } break; /* Multicast not (yet) supported */ default: error = EINVAL; } (void) splx(s); return error; }