/* $NetBSD: if_sn.c,v 1.38.6.2 2018/07/26 23:55:29 snj Exp $ */ /* * National Semiconductor DP8393X SONIC Driver * Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk) * You may use, copy, and modify this program so long as you retain the * copyright line. * * This driver has been substantially modified since Algorithmics donated * it. * * Denton Gentry * and also * Yanagisawa Takeshi * did the work to get this running on the Macintosh. */ #include __KERNEL_RCSID(0, "$NetBSD: if_sn.c,v 1.38.6.2 2018/07/26 23:55:29 snj Exp $"); #include "opt_inet.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #include #include #include #include #include /* #define SONIC_DEBUG */ #ifdef SONIC_DEBUG # define DPRINTF printf #else # define DPRINTF while (0) printf #endif static void snwatchdog(struct ifnet *); static int sninit(struct sn_softc *sc); static int snstop(struct sn_softc *sc); static int snioctl(struct ifnet *ifp, u_long cmd, void *data); static void snstart(struct ifnet *ifp); static void snreset(struct sn_softc *sc); static void caminitialise(struct sn_softc *); static void camentry(struct sn_softc *, int, const u_char *ea); static void camprogram(struct sn_softc *); static void initialise_tda(struct sn_softc *); static void initialise_rda(struct sn_softc *); static void initialise_rra(struct sn_softc *); #ifdef SNDEBUG static void camdump(struct sn_softc *sc); #endif static void sonictxint(struct sn_softc *); static void sonicrxint(struct sn_softc *); static inline u_int sonicput(struct sn_softc *sc, struct mbuf *m0, int mtd_next); static inline int sonic_read(struct sn_softc *, void *, int); static inline struct mbuf *sonic_get(struct sn_softc *, void *, int); int sndebug = 0; /* * SONIC buffers need to be aligned 16 or 32 bit aligned. * These macros calculate and verify alignment. */ #define SOALIGN(m, array) (m ? (roundup((int)array, 4)) : \ (roundup((int)array, 2))) #define LOWER(x) ((unsigned)(x) & 0xffff) #define UPPER(x) ((unsigned)(x) >> 16) /* * Interface exists: make available by filling in network interface * record. System will initialize the interface when it is ready * to accept packets. */ int snsetup(struct sn_softc *sc, uint8_t *lladdr) { struct ifnet *ifp = &sc->sc_if; uint8_t *p; uint8_t *pp; int i; if (sc->space == NULL) { aprint_error_dev(sc->sc_dev, "memory allocation for descriptors failed\n"); return 1; } /* * Put the pup in reset mode (sninit() will fix it later), * stop the timer, disable all interrupts and clear any interrupts. */ NIC_PUT(sc, SNR_CR, CR_STP); wbflush(); NIC_PUT(sc, SNR_CR, CR_RST); wbflush(); NIC_PUT(sc, SNR_IMR, 0); wbflush(); NIC_PUT(sc, SNR_ISR, ISR_ALL); wbflush(); /* * because the SONIC is basically 16bit device it 'concatenates' * a higher buffer address to a 16 bit offset--this will cause wrap * around problems near the end of 64k !! */ p = sc->space; pp = (uint8_t *)roundup((int)p, PAGE_SIZE); p = pp; for (i = 0; i < NRRA; i++) { sc->p_rra[i] = (void *)p; sc->v_rra[i] = SONIC_GETDMA(p); p += RXRSRC_SIZE(sc); } sc->v_rea = SONIC_GETDMA(p); p = (uint8_t *)SOALIGN(sc, p); sc->p_cda = (void *)(p); sc->v_cda = SONIC_GETDMA(p); p += CDA_SIZE(sc); p = (uint8_t *)SOALIGN(sc, p); for (i = 0; i < NTDA; i++) { struct mtd *mtdp = &sc->mtda[i]; mtdp->mtd_txp = (void *)p; mtdp->mtd_vtxp = SONIC_GETDMA(p); p += TXP_SIZE(sc); } p = (uint8_t *)SOALIGN(sc, p); if ((p - pp) > PAGE_SIZE) { aprint_error_dev(sc->sc_dev, "sizeof RRA (%ld) + CDA (%ld) +" "TDA (%ld) > PAGE_SIZE (%d). Punt!\n", (ulong)sc->p_cda - (ulong)sc->p_rra[0], (ulong)sc->mtda[0].mtd_txp - (ulong)sc->p_cda, (ulong)p - (ulong)sc->mtda[0].mtd_txp, PAGE_SIZE); return 1; } p = pp + PAGE_SIZE; pp = p; sc->sc_nrda = PAGE_SIZE / RXPKT_SIZE(sc); sc->p_rda = (void *)p; sc->v_rda = SONIC_GETDMA(p); p = pp + PAGE_SIZE; for (i = 0; i < NRBA; i++) { sc->rbuf[i] = (void *)p; p += PAGE_SIZE; } pp = p; for (i = 0; i < NTDA; i++) { struct mtd *mtdp = &sc->mtda[i]; mtdp->mtd_buf = p; mtdp->mtd_vbuf = SONIC_GETDMA(p); p += TXBSIZE; } #ifdef SNDEBUG camdump(sc); #endif aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n", ether_sprintf(lladdr)); #ifdef SNDEBUG aprint_debug_dev(sc->sc_dev, "buffers: rra=%p cda=%p rda=%p tda=%p\n", device_xname(sc->sc_dev), sc->p_rra[0], sc->p_cda, sc->p_rda, sc->mtda[0].mtd_txp); #endif strcpy(ifp->if_xname, device_xname(sc->sc_dev)); ifp->if_softc = sc; ifp->if_ioctl = snioctl; ifp->if_start = snstart; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; ifp->if_watchdog = snwatchdog; if_attach(ifp); if_deferred_start_init(ifp, NULL); ether_ifattach(ifp, lladdr); return 0; } static int snioctl(struct ifnet *ifp, u_long cmd, void *data) { struct ifaddr *ifa; struct sn_softc *sc = ifp->if_softc; int s = splnet(), err = 0; int temp; switch (cmd) { case SIOCINITIFADDR: ifa = (struct ifaddr *)data; ifp->if_flags |= IFF_UP; (void)sninit(sc); switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: arp_ifinit(ifp, ifa); break; #endif default: break; } break; case SIOCSIFFLAGS: if ((err = ifioctl_common(ifp, cmd, data)) != 0) break; 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. */ snstop(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. */ (void)sninit(sc); } else { /* * reset the interface to pick up any other changes * in flags */ temp = ifp->if_flags & IFF_UP; snreset(sc); ifp->if_flags |= temp; snstart(ifp); } break; case SIOCADDMULTI: case SIOCDELMULTI: if ((err = ether_ioctl(ifp, cmd, data)) == ENETRESET) { /* * Multicast list has changed; set the hardware * filter accordingly. But remember UP flag! */ if (ifp->if_flags & IFF_RUNNING) { temp = ifp->if_flags & IFF_UP; snreset(sc); ifp->if_flags |= temp; } err = 0; } break; default: err = ether_ioctl(ifp, cmd, data); break; } splx(s); return err; } /* * Encapsulate a packet of type family for the local net. */ static void snstart(struct ifnet *ifp) { struct sn_softc *sc = ifp->if_softc; struct mbuf *m; int mtd_next; if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) return; outloop: /* Check for room in the xmit buffer. */ if ((mtd_next = (sc->mtd_free + 1)) == NTDA) mtd_next = 0; if (mtd_next == sc->mtd_hw) { ifp->if_flags |= IFF_OACTIVE; return; } IF_DEQUEUE(&ifp->if_snd, m); if (m == 0) return; /* We need the header for m_pkthdr.len. */ if ((m->m_flags & M_PKTHDR) == 0) panic("%s: snstart: no header mbuf", device_xname(sc->sc_dev)); /* * If bpf is listening on this interface, let it * see the packet before we commit it to the wire. */ bpf_mtap(ifp, m); /* * If there is nothing in the o/p queue, and there is room in * the Tx ring, then send the packet directly. Otherwise append * it to the o/p queue. */ if ((sonicput(sc, m, mtd_next)) == 0) { IF_PREPEND(&ifp->if_snd, m); return; } sc->mtd_prev = sc->mtd_free; sc->mtd_free = mtd_next; ifp->if_opackets++; /* # of pkts */ /* Jump back for possibly more punishment. */ goto outloop; } /* * reset and restart the SONIC. Called in case of fatal * hardware/software errors. */ static void snreset(struct sn_softc *sc) { snstop(sc); sninit(sc); } static int sninit(struct sn_softc *sc) { u_long s_rcr; int s; if (sc->sc_if.if_flags & IFF_RUNNING) /* already running */ return 0; s = splnet(); NIC_PUT(sc, SNR_CR, CR_RST); /* DCR only accessible in reset mode! */ /* config it */ NIC_PUT(sc, SNR_DCR, (sc->snr_dcr | (sc->bitmode ? DCR_DW32 : DCR_DW16))); NIC_PUT(sc, SNR_DCR2, sc->snr_dcr2); s_rcr = RCR_BRD | RCR_LBNONE; if (sc->sc_if.if_flags & IFF_PROMISC) s_rcr |= RCR_PRO; if (sc->sc_if.if_flags & IFF_ALLMULTI) s_rcr |= RCR_AMC; NIC_PUT(sc, SNR_RCR, s_rcr); #if 0 NIC_PUT(sc, SNR_IMR, (IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_LCDEN)); #else NIC_PUT(sc, SNR_IMR, IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_LCDEN | IMR_BREN | IMR_HBLEN | IMR_RDEEN | IMR_RBEEN | IMR_RBAEEN | IMR_RFOEN); #endif /* clear pending interrupts */ NIC_PUT(sc, SNR_ISR, ISR_ALL); /* clear tally counters */ NIC_PUT(sc, SNR_CRCT, -1); NIC_PUT(sc, SNR_FAET, -1); NIC_PUT(sc, SNR_MPT, -1); initialise_tda(sc); initialise_rda(sc); initialise_rra(sc); sn_md_init(sc); /* MD initialization */ /* enable the chip */ NIC_PUT(sc, SNR_CR, 0); wbflush(); /* program the CAM */ camprogram(sc); /* get it to read resource descriptors */ NIC_PUT(sc, SNR_CR, CR_RRRA); wbflush(); while ((NIC_GET(sc, SNR_CR)) & CR_RRRA) continue; /* enable rx */ NIC_PUT(sc, SNR_CR, CR_RXEN); wbflush(); /* flag interface as "running" */ sc->sc_if.if_flags |= IFF_RUNNING; sc->sc_if.if_flags &= ~IFF_OACTIVE; splx(s); return 0; } /* * close down an interface and free its buffers * Called on final close of device, or if sninit() fails * part way through. */ static int snstop(struct sn_softc *sc) { struct mtd *mtd; int s = splnet(); /* stick chip in reset */ NIC_PUT(sc, SNR_CR, CR_RST); wbflush(); /* free all receive buffers (currently static so nothing to do) */ /* free all pending transmit mbufs */ while (sc->mtd_hw != sc->mtd_free) { mtd = &sc->mtda[sc->mtd_hw]; if (mtd->mtd_mbuf) m_freem(mtd->mtd_mbuf); if (++sc->mtd_hw == NTDA) sc->mtd_hw = 0; } sc->sc_if.if_timer = 0; sc->sc_if.if_flags &= ~(IFF_RUNNING | IFF_UP); splx(s); return 0; } /* * Called if any Tx packets remain unsent after 5 seconds, * In all cases we just reset the chip, and any retransmission * will be handled by higher level protocol timeouts. */ static void snwatchdog(struct ifnet *ifp) { struct sn_softc *sc = ifp->if_softc; struct mtd *mtd; int temp; if (sc->mtd_hw != sc->mtd_free) { /* something still pending for transmit */ mtd = &sc->mtda[sc->mtd_hw]; if (SRO(sc->bitmode, mtd->mtd_txp, TXP_STATUS) == 0) log(LOG_ERR, "%s: Tx - timeout\n", device_xname(sc->sc_dev)); else log(LOG_ERR, "%s: Tx - lost interrupt\n", device_xname(sc->sc_dev)); temp = ifp->if_flags & IFF_UP; snreset(sc); ifp->if_flags |= temp; } } /* * stuff packet into sonic (at splnet) */ static inline u_int sonicput(struct sn_softc *sc, struct mbuf *m0, int mtd_next) { struct mtd *mtdp; struct mbuf *m; u_char *buff; void *txp; u_int len = 0; u_int totlen = 0; #ifdef whyonearthwouldyoudothis if (NIC_GET(sc, SNR_CR) & CR_TXP) return 0; #endif /* grab the replacement mtd */ mtdp = &sc->mtda[sc->mtd_free]; buff = mtdp->mtd_buf; /* this packet goes to mtdnext fill in the TDA */ mtdp->mtd_mbuf = m0; txp = mtdp->mtd_txp; /* Write to the config word. Every (NTDA/2)+1 packets we set an intr */ if (sc->mtd_pint == 0) { sc->mtd_pint = NTDA/2; SWO(sc->bitmode, txp, TXP_CONFIG, TCR_PINT); } else { sc->mtd_pint--; SWO(sc->bitmode, txp, TXP_CONFIG, 0); } for (m = m0; m; m = m->m_next) { u_char *data = mtod(m, u_char *); len = m->m_len; totlen += len; memcpy(buff, data, len); buff += len; } if (totlen >= TXBSIZE) { panic("%s: sonicput: packet overflow", device_xname(sc->sc_dev)); } SWO(sc->bitmode, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRLO, LOWER(mtdp->mtd_vbuf)); SWO(sc->bitmode, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRHI, UPPER(mtdp->mtd_vbuf)); if (totlen < ETHERMIN + ETHER_HDR_LEN) { int pad = ETHERMIN + ETHER_HDR_LEN - totlen; memset((char *)mtdp->mtd_buf + totlen, 0, pad); totlen = ETHERMIN + ETHER_HDR_LEN; } SWO(sc->bitmode, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FSIZE, totlen); SWO(sc->bitmode, txp, TXP_FRAGCNT, 1); SWO(sc->bitmode, txp, TXP_PKTSIZE, totlen); /* link onto the next mtd that will be used */ SWO(sc->bitmode, txp, TXP_FRAGOFF + (1 * TXP_FRAGSIZE) + TXP_FPTRLO, LOWER(sc->mtda[mtd_next].mtd_vtxp) | EOL); /* * The previous txp.tlink currently contains a pointer to * our txp | EOL. Want to clear the EOL, so write our * pointer to the previous txp. */ SWO(sc->bitmode, sc->mtda[sc->mtd_prev].mtd_txp, sc->mtd_tlinko, LOWER(mtdp->mtd_vtxp)); /* make sure chip is running */ wbflush(); NIC_PUT(sc, SNR_CR, CR_TXP); wbflush(); sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */ return totlen; } /* * These are called from sonicioctl() when /etc/ifconfig is run to set * the address or switch the i/f on. */ /* * CAM support */ static void caminitialise(struct sn_softc *sc) { void *p_cda = sc->p_cda; int i; int camoffset; for (i = 0; i < MAXCAM; i++) { camoffset = i * CDA_CAMDESC; SWO(bitmode, p_cda, (camoffset + CDA_CAMEP), i); SWO(bitmode, p_cda, (camoffset + CDA_CAMAP2), 0); SWO(bitmode, p_cda, (camoffset + CDA_CAMAP1), 0); SWO(bitmode, p_cda, (camoffset + CDA_CAMAP0), 0); } SWO(bitmode, p_cda, CDA_ENABLE, 0); } static void camentry(struct sn_softc *sc, int entry, const u_char *ea) { void *p_cda = sc->p_cda; int camoffset = entry * CDA_CAMDESC; SWO(bitmode, p_cda, camoffset + CDA_CAMEP, entry); SWO(bitmode, p_cda, camoffset + CDA_CAMAP2, (ea[5] << 8) | ea[4]); SWO(bitmode, p_cda, camoffset + CDA_CAMAP1, (ea[3] << 8) | ea[2]); SWO(bitmode, p_cda, camoffset + CDA_CAMAP0, (ea[1] << 8) | ea[0]); SWO(bitmode, p_cda, CDA_ENABLE, (SRO(bitmode, p_cda, CDA_ENABLE) | (1 << entry))); } static void camprogram(struct sn_softc *sc) { struct ether_multistep step; struct ether_multi *enm; struct ifnet *ifp; int timeout; int mcount = 0; caminitialise(sc); ifp = &sc->sc_if; /* Always load our own address first. */ camentry(sc, mcount, CLLADDR(ifp->if_sadl)); mcount++; /* Assume we won't need allmulti bit. */ ifp->if_flags &= ~IFF_ALLMULTI; /* Loop through multicast addresses */ ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); while (enm != NULL) { if (mcount == MAXCAM) { ifp->if_flags |= IFF_ALLMULTI; break; } if (memcmp(enm->enm_addrlo, enm->enm_addrhi, sizeof(enm->enm_addrlo)) != 0) { /* * SONIC's CAM is programmed with specific * addresses. It has no way to specify a range. * (Well, thats not exactly true. If the * range is small one could program each addr * within the range as a separate CAM entry) */ ifp->if_flags |= IFF_ALLMULTI; break; } /* program the CAM with the specified entry */ camentry(sc, mcount, enm->enm_addrlo); mcount++; ETHER_NEXT_MULTI(step, enm); } NIC_PUT(sc, SNR_CDP, LOWER(sc->v_cda)); NIC_PUT(sc, SNR_CDC, MAXCAM); NIC_PUT(sc, SNR_CR, CR_LCAM); wbflush(); timeout = 10000; while ((NIC_GET(sc, SNR_CR) & CR_LCAM) && timeout--) delay(10); if (timeout == 0) { /* XXX */ panic("%s: CAM initialisation failed", device_xname(sc->sc_dev)); } timeout = 10000; while (((NIC_GET(sc, SNR_ISR) & ISR_LCD) == 0) && timeout--) delay(10); if (NIC_GET(sc, SNR_ISR) & ISR_LCD) NIC_PUT(sc, SNR_ISR, ISR_LCD); else printf("%s: CAM initialisation without interrupt\n", device_xname(sc->sc_dev)); } #ifdef SNDEBUG static void camdump(struct sn_softc *sc) { int i; printf("CAM entries:\n"); NIC_PUT(sc, SNR_CR, CR_RST); wbflush(); for (i = 0; i < 16; i++) { ushort ap2, ap1, ap0; NIC_PUT(sc, SNR_CEP, i); wbflush(); ap2 = NIC_GET(sc, SNR_CAP2); ap1 = NIC_GET(sc, SNR_CAP1); ap0 = NIC_GET(sc, SNR_CAP0); printf("%d: ap2=0x%x ap1=0x%x ap0=0x%x\n", i, ap2, ap1, ap0); } printf("CAM enable 0x%x\n", NIC_GET(sc, SNR_CEP)); NIC_PUT(sc, SNR_CR, 0); wbflush(); } #endif static void initialise_tda(struct sn_softc *sc) { struct mtd *mtd; int i; for (i = 0; i < NTDA; i++) { mtd = &sc->mtda[i]; mtd->mtd_mbuf = 0; } sc->mtd_hw = 0; sc->mtd_prev = NTDA - 1; sc->mtd_free = 0; sc->mtd_tlinko = TXP_FRAGOFF + 1*TXP_FRAGSIZE + TXP_FPTRLO; sc->mtd_pint = NTDA/2; NIC_PUT(sc, SNR_UTDA, UPPER(sc->mtda[0].mtd_vtxp)); NIC_PUT(sc, SNR_CTDA, LOWER(sc->mtda[0].mtd_vtxp)); } static void initialise_rda(struct sn_softc *sc) { int i; char *p_rda = 0; uint32_t v_rda = 0; /* link the RDA's together into a circular list */ for (i = 0; i < (sc->sc_nrda - 1); i++) { p_rda = (char *)sc->p_rda + (i * RXPKT_SIZE(sc)); v_rda = sc->v_rda + ((i+1) * RXPKT_SIZE(sc)); SWO(bitmode, p_rda, RXPKT_RLINK, LOWER(v_rda)); SWO(bitmode, p_rda, RXPKT_INUSE, 1); } p_rda = (char *)sc->p_rda + ((sc->sc_nrda - 1) * RXPKT_SIZE(sc)); SWO(bitmode, p_rda, RXPKT_RLINK, LOWER(sc->v_rda) | EOL); SWO(bitmode, p_rda, RXPKT_INUSE, 1); /* mark end of receive descriptor list */ sc->sc_rdamark = sc->sc_nrda - 1; sc->sc_rxmark = 0; NIC_PUT(sc, SNR_URDA, UPPER(sc->v_rda)); NIC_PUT(sc, SNR_CRDA, LOWER(sc->v_rda)); wbflush(); } static void initialise_rra(struct sn_softc *sc) { int i; u_int v; int bitmode = sc->bitmode; if (bitmode) NIC_PUT(sc, SNR_EOBC, RBASIZE(sc) / 2 - 2); else NIC_PUT(sc, SNR_EOBC, RBASIZE(sc) / 2 - 1); NIC_PUT(sc, SNR_URRA, UPPER(sc->v_rra[0])); NIC_PUT(sc, SNR_RSA, LOWER(sc->v_rra[0])); /* rea must point just past the end of the rra space */ NIC_PUT(sc, SNR_REA, LOWER(sc->v_rea)); NIC_PUT(sc, SNR_RRP, LOWER(sc->v_rra[0])); NIC_PUT(sc, SNR_RSC, 0); /* fill up SOME of the rra with buffers */ for (i = 0; i < NRBA; i++) { v = SONIC_GETDMA(sc->rbuf[i]); SWO(bitmode, sc->p_rra[i], RXRSRC_PTRHI, UPPER(v)); SWO(bitmode, sc->p_rra[i], RXRSRC_PTRLO, LOWER(v)); SWO(bitmode, sc->p_rra[i], RXRSRC_WCHI, UPPER(PAGE_SIZE/2)); SWO(bitmode, sc->p_rra[i], RXRSRC_WCLO, LOWER(PAGE_SIZE/2)); } sc->sc_rramark = NRBA; NIC_PUT(sc, SNR_RWP, LOWER(sc->v_rra[sc->sc_rramark])); wbflush(); } int snintr(void *arg) { struct sn_softc *sc = (struct sn_softc *)arg; int handled = 0; int isr; while ((isr = (NIC_GET(sc, SNR_ISR) & ISR_ALL)) != 0) { /* scrub the interrupts that we are going to service */ NIC_PUT(sc, SNR_ISR, isr); handled = 1; wbflush(); if (isr & (ISR_BR | ISR_LCD | ISR_TC)) printf("%s: unexpected interrupt status 0x%x\n", device_xname(sc->sc_dev), isr); if (isr & (ISR_TXDN | ISR_TXER | ISR_PINT)) sonictxint(sc); if (isr & ISR_PKTRX) sonicrxint(sc); if (isr & (ISR_HBL | ISR_RDE | ISR_RBE | ISR_RBAE | ISR_RFO)) { if (isr & ISR_HBL) /* * The repeater is not providing a heartbeat. * In itself this isn't harmful, lots of the * cheap repeater hubs don't supply a heartbeat. * So ignore the lack of heartbeat. Its only * if we can't detect a carrier that we have a * problem. */ ; if (isr & ISR_RDE) printf("%s: receive descriptors exhausted\n", device_xname(sc->sc_dev)); if (isr & ISR_RBE) printf("%s: receive buffers exhausted\n", device_xname(sc->sc_dev)); if (isr & ISR_RBAE) printf("%s: receive buffer area exhausted\n", device_xname(sc->sc_dev)); if (isr & ISR_RFO) printf("%s: receive FIFO overrun\n", device_xname(sc->sc_dev)); } if (isr & (ISR_CRC | ISR_FAE | ISR_MP)) { #ifdef notdef if (isr & ISR_CRC) sc->sc_crctally++; if (isr & ISR_FAE) sc->sc_faetally++; if (isr & ISR_MP) sc->sc_mptally++; #endif } if_schedule_deferred_start(&sc->sc_if); } return handled; } /* * Transmit interrupt routine */ static void sonictxint(struct sn_softc *sc) { struct mtd *mtd; void *txp; unsigned short txp_status; int mtd_hw; struct ifnet *ifp = &sc->sc_if; mtd_hw = sc->mtd_hw; if (mtd_hw == sc->mtd_free) return; while (mtd_hw != sc->mtd_free) { mtd = &sc->mtda[mtd_hw]; txp = mtd->mtd_txp; if (SRO(sc->bitmode, txp, TXP_STATUS) == 0) { break; /* it hasn't really gone yet */ } #ifdef SNDEBUG { struct ether_header *eh; eh = (struct ether_header *) mtd->mtd_buf; printf("%s: xmit status=0x%x len=%d type=0x%x from %s", device_xname(sc->sc_dev), SRO(sc->bitmode, txp, TXP_STATUS), SRO(sc->bitmode, txp, TXP_PKTSIZE), htons(eh->ether_type), ether_sprintf(eh->ether_shost)); printf(" (to %s)\n", ether_sprintf(eh->ether_dhost)); } #endif /* SNDEBUG */ ifp->if_flags &= ~IFF_OACTIVE; if (mtd->mtd_mbuf != 0) { m_freem(mtd->mtd_mbuf); mtd->mtd_mbuf = 0; } if (++mtd_hw == NTDA) mtd_hw = 0; txp_status = SRO(sc->bitmode, txp, TXP_STATUS); ifp->if_collisions += (txp_status & TCR_EXC) ? 16 : ((txp_status & TCR_NC) >> 12); if ((txp_status & TCR_PTX) == 0) { ifp->if_oerrors++; printf("%s: Tx packet status=0x%x\n", device_xname(sc->sc_dev), txp_status); /* XXX - DG This looks bogus */ if (mtd_hw != sc->mtd_free) { printf("resubmitting remaining packets\n"); mtd = &sc->mtda[mtd_hw]; NIC_PUT(sc, SNR_CTDA, LOWER(mtd->mtd_vtxp)); NIC_PUT(sc, SNR_CR, CR_TXP); wbflush(); break; } } } sc->mtd_hw = mtd_hw; return; } /* * Receive interrupt routine */ static void sonicrxint(struct sn_softc *sc) { void * rda; int orra; int len; int rramark; int rdamark; uint16_t rxpkt_ptr; rda = (char *)sc->p_rda + (sc->sc_rxmark * RXPKT_SIZE(sc)); while (SRO(bitmode, rda, RXPKT_INUSE) == 0) { u_int status = SRO(bitmode, rda, RXPKT_STATUS); orra = RBASEQ(SRO(bitmode, rda, RXPKT_SEQNO)) & RRAMASK; rxpkt_ptr = SRO(bitmode, rda, RXPKT_PTRLO); len = SRO(bitmode, rda, RXPKT_BYTEC) - FCSSIZE; if (status & RCR_PRX) { void *pkt = (char *)sc->rbuf[orra & RBAMASK] + (rxpkt_ptr & PGOFSET); if (sonic_read(sc, pkt, len) == 0) sc->sc_if.if_ierrors++; } else sc->sc_if.if_ierrors++; /* * give receive buffer area back to chip. * * If this was the last packet in the RRA, give the RRA to * the chip again. * If sonic read didnt copy it out then we would have to * wait !! * (dont bother add it back in again straight away) * * Really, we're doing p_rra[rramark] = p_rra[orra] but * we have to use the macros because SONIC might be in * 16 or 32 bit mode. */ if (status & RCR_LPKT) { void *tmp1, *tmp2; rramark = sc->sc_rramark; tmp1 = sc->p_rra[rramark]; tmp2 = sc->p_rra[orra]; SWO(bitmode, tmp1, RXRSRC_PTRLO, SRO(bitmode, tmp2, RXRSRC_PTRLO)); SWO(bitmode, tmp1, RXRSRC_PTRHI, SRO(bitmode, tmp2, RXRSRC_PTRHI)); SWO(bitmode, tmp1, RXRSRC_WCLO, SRO(bitmode, tmp2, RXRSRC_WCLO)); SWO(bitmode, tmp1, RXRSRC_WCHI, SRO(bitmode, tmp2, RXRSRC_WCHI)); /* zap old rra for fun */ SWO(bitmode, tmp2, RXRSRC_WCHI, 0); SWO(bitmode, tmp2, RXRSRC_WCLO, 0); sc->sc_rramark = (++rramark) & RRAMASK; NIC_PUT(sc, SNR_RWP, LOWER(sc->v_rra[rramark])); wbflush(); } /* * give receive descriptor back to chip simple * list is circular */ rdamark = sc->sc_rdamark; SWO(bitmode, rda, RXPKT_INUSE, 1); SWO(bitmode, rda, RXPKT_RLINK, SRO(bitmode, rda, RXPKT_RLINK) | EOL); SWO(bitmode, ((char *)sc->p_rda + (rdamark * RXPKT_SIZE(sc))), RXPKT_RLINK, SRO(bitmode, ((char *)sc->p_rda + (rdamark * RXPKT_SIZE(sc))), RXPKT_RLINK) & ~EOL); sc->sc_rdamark = sc->sc_rxmark; if (++sc->sc_rxmark >= sc->sc_nrda) sc->sc_rxmark = 0; rda = (char *)sc->p_rda + (sc->sc_rxmark * RXPKT_SIZE(sc)); } } /* * sonic_read -- pull packet off interface and forward to * appropriate protocol handler */ static inline int sonic_read(struct sn_softc *sc, void *pkt, int len) { struct ifnet *ifp = &sc->sc_if; struct mbuf *m; #ifdef SNDEBUG { printf("%s: rcvd %p len=%d type=0x%x from %s", devoce_xname(sc->sc_dev), et, len, htons(et->ether_type), ether_sprintf(et->ether_shost)); printf(" (to %s)\n", ether_sprintf(et->ether_dhost)); } #endif /* SNDEBUG */ if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN) || len > (ETHER_MAX_LEN - ETHER_CRC_LEN)) { printf("%s: invalid packet length %d bytes\n", device_xname(sc->sc_dev), len); return 0; } m = sonic_get(sc, pkt, len); if (m == NULL) return 0; if_percpuq_enqueue(ifp->if_percpuq, m); return 1; } /* * munge the received packet into an mbuf chain */ static inline struct mbuf * sonic_get(struct sn_softc *sc, void *pkt, int datalen) { struct mbuf *m, *top, **mp; int len; MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == 0) return 0; m_set_rcvif(m, &sc->sc_if); m->m_pkthdr.len = datalen; len = MHLEN; top = 0; mp = ⊤ while (datalen > 0) { if (top) { MGET(m, M_DONTWAIT, MT_DATA); if (m == 0) { m_freem(top); return 0; } len = MLEN; } if (datalen >= MINCLSIZE) { MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { if (top) m_freem(top); else m_freem(m); return 0; } len = MCLBYTES; } if (mp == &top) { char *newdata = (char *) ALIGN((char *)m->m_data + sizeof(struct ether_header)) - sizeof(struct ether_header); len -= newdata - m->m_data; m->m_data = newdata; } m->m_len = len = min(datalen, len); memcpy(mtod(m, void *), pkt, (unsigned) len); pkt = (char *)pkt + len; datalen -= len; *mp = m; mp = &m->m_next; } return top; }