/* $OpenBSD: am7990.c,v 1.10 1997/08/08 08:05:40 downsj Exp $ */ /* $NetBSD: am7990.c,v 1.22 1996/10/13 01:37:19 christos Exp $ */ /*- * Copyright (c) 1995 Charles M. Hannum. All rights reserved. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell and Rick Macklem. * * 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 the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)if_le.c 8.2 (Berkeley) 11/16/93 */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #if NBPFILTER > 0 #include #include #endif #include #include #ifdef LEDEBUG void am7990_recv_print __P((struct am7990_softc *, int)); void am7990_xmit_print __P((struct am7990_softc *, int)); #endif integrate void am7990_rint __P((struct am7990_softc *)); integrate void am7990_tint __P((struct am7990_softc *)); integrate int am7990_put __P((struct am7990_softc *, int, struct mbuf *)); integrate struct mbuf *am7990_get __P((struct am7990_softc *, int, int)); integrate void am7990_read __P((struct am7990_softc *, int, int)); hide void am7990_shutdown __P((void *)); #define ifp (&sc->sc_arpcom.ac_if) #if 0 /* XXX what do we do about this?! --thorpej */ static inline u_int16_t ether_cmp __P((void *, void *)); /* * Compare two Ether/802 addresses for equality, inlined and * unrolled for speed. I'd love to have an inline assembler * version of this... XXX: Who wanted that? mycroft? * I wrote one, but the following is just as efficient. * This expands to 10 short m68k instructions! -gwr * Note: use this like bcmp() */ static inline u_short ether_cmp(one, two) void *one, *two; { register u_int16_t *a = (u_short *) one; register u_int16_t *b = (u_short *) two; register u_int16_t diff; diff = *a++ - *b++; diff |= *a++ - *b++; diff |= *a++ - *b++; return (diff); } #define ETHER_CMP ether_cmp #endif /* XXX */ #ifndef ETHER_CMP #define ETHER_CMP(a, b) bcmp((a), (b), ETHER_ADDR_LEN) #endif /* * am7990 configuration driver. Attachments are provided by * machine-dependent driver front-ends. */ struct cfdriver le_cd = { NULL, "le", DV_IFNET }; void am7990_config(sc) struct am7990_softc *sc; { int mem; /* Make sure the chip is stopped. */ am7990_stop(sc); /* Initialize ifnet structure. */ bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); ifp->if_softc = sc; ifp->if_start = am7990_start; ifp->if_ioctl = am7990_ioctl; ifp->if_watchdog = am7990_watchdog; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; #ifdef LANCE_REVC_BUG ifp->if_flags &= ~IFF_MULTICAST; #endif /* Attach the interface. */ if_attach(ifp); ether_ifattach(ifp); #if NBPFILTER > 0 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif switch (sc->sc_memsize) { case 8192: sc->sc_nrbuf = 4; sc->sc_ntbuf = 1; break; case 16384: sc->sc_nrbuf = 8; sc->sc_ntbuf = 2; break; case 32768: sc->sc_nrbuf = 16; sc->sc_ntbuf = 4; break; case 65536: sc->sc_nrbuf = 32; sc->sc_ntbuf = 8; break; default: panic("am7990_config: weird memory size"); } printf(": address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr)); printf("%s: %d receive buffers, %d transmit buffers\n", sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf); sc->sc_sh = shutdownhook_establish(am7990_shutdown, sc); if (sc->sc_sh == NULL) panic("am7990_config: can't establish shutdownhook"); mem = 0; sc->sc_initaddr = mem; mem += sizeof(struct leinit); sc->sc_rmdaddr = mem; mem += sizeof(struct lermd) * sc->sc_nrbuf; sc->sc_tmdaddr = mem; mem += sizeof(struct letmd) * sc->sc_ntbuf; sc->sc_rbufaddr = mem; mem += LEBLEN * sc->sc_nrbuf; sc->sc_tbufaddr = mem; mem += LEBLEN * sc->sc_ntbuf; #ifdef notyet if (mem > ...) panic(...); #endif } void am7990_reset(sc) struct am7990_softc *sc; { int s; s = splimp(); am7990_init(sc); splx(s); } /* * Set up the initialization block and the descriptor rings. */ void am7990_meminit(sc) register struct am7990_softc *sc; { u_long a; int bix; struct leinit init; struct lermd rmd; struct letmd tmd; #if NBPFILTER > 0 if (ifp->if_flags & IFF_PROMISC) init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM; else #endif init.init_mode = LE_MODE_NORMAL; init.init_padr[0] = (sc->sc_arpcom.ac_enaddr[1] << 8) | sc->sc_arpcom.ac_enaddr[0]; init.init_padr[1] = (sc->sc_arpcom.ac_enaddr[3] << 8) | sc->sc_arpcom.ac_enaddr[2]; init.init_padr[2] = (sc->sc_arpcom.ac_enaddr[5] << 8) | sc->sc_arpcom.ac_enaddr[4]; am7990_setladrf(&sc->sc_arpcom, init.init_ladrf); sc->sc_last_rd = 0; sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0; a = sc->sc_addr + LE_RMDADDR(sc, 0); init.init_rdra = a; init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13); a = sc->sc_addr + LE_TMDADDR(sc, 0); init.init_tdra = a; init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13); (*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init)); /* * Set up receive ring descriptors. */ for (bix = 0; bix < sc->sc_nrbuf; bix++) { a = sc->sc_addr + LE_RBUFADDR(sc, bix); rmd.rmd0 = a; rmd.rmd1_hadr = a >> 16; rmd.rmd1_bits = LE_R1_OWN; rmd.rmd2 = -LEBLEN | LE_XMD2_ONES; rmd.rmd3 = 0; (*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix), sizeof(rmd)); } /* * Set up transmit ring descriptors. */ for (bix = 0; bix < sc->sc_ntbuf; bix++) { a = sc->sc_addr + LE_TBUFADDR(sc, bix); tmd.tmd0 = a; tmd.tmd1_hadr = a >> 16; tmd.tmd1_bits = 0; tmd.tmd2 = 0 | LE_XMD2_ONES; tmd.tmd3 = 0; (*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix), sizeof(tmd)); } } void am7990_stop(sc) struct am7990_softc *sc; { (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); } /* * Initialization of interface; set up initialization block * and transmit/receive descriptor rings. */ void am7990_init(sc) register struct am7990_softc *sc; { register int timo; u_long a; (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); DELAY(100); /* Newer LANCE chips have a reset register */ if (sc->sc_hwreset) (*sc->sc_hwreset)(sc); /* Set the correct byte swapping mode, etc. */ (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3); /* Set up LANCE init block. */ am7990_meminit(sc); /* Give LANCE the physical address of its init block. */ a = sc->sc_addr + LE_INITADDR(sc); (*sc->sc_wrcsr)(sc, LE_CSR1, a); (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); /* Try to initialize the LANCE. */ DELAY(100); (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); /* Wait for initialization to finish. */ for (timo = 100000; timo; timo--) if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) break; if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { /* Start the LANCE. */ (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT | LE_C0_IDON); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; ifp->if_timer = 0; am7990_start(ifp); } else printf("%s: card failed to initialize\n", sc->sc_dev.dv_xname); if (sc->sc_hwinit) (*sc->sc_hwinit)(sc); } /* * Routine to copy from mbuf chain to transmit buffer in * network buffer memory. */ integrate int am7990_put(sc, boff, m) struct am7990_softc *sc; int boff; register struct mbuf *m; { register struct mbuf *n; register int len, tlen = 0; for (; m; m = n) { len = m->m_len; if (len == 0) { MFREE(m, n); continue; } (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); boff += len; tlen += len; MFREE(m, n); } if (tlen < LEMINSIZE) { (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); tlen = LEMINSIZE; } return (tlen); } /* * Pull data off an interface. * Len is length of data, with local net header stripped. * We copy the data into mbufs. When full cluster sized units are present * we copy into clusters. */ integrate struct mbuf * am7990_get(sc, boff, totlen) struct am7990_softc *sc; int boff, totlen; { register struct mbuf *m; struct mbuf *top, **mp; int len, pad; MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == 0) return (0); m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = totlen; pad = ALIGN(sizeof(struct ether_header)) - sizeof(struct ether_header); m->m_data += pad; len = MHLEN - pad; top = 0; mp = ⊤ while (totlen > 0) { if (top) { MGET(m, M_DONTWAIT, MT_DATA); if (m == 0) { m_freem(top); return 0; } len = MLEN; } if (top && totlen >= MINCLSIZE) { MCLGET(m, M_DONTWAIT); if (m->m_flags & M_EXT) len = MCLBYTES; } m->m_len = len = min(totlen, len); (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); boff += len; totlen -= len; *mp = m; mp = &m->m_next; } return (top); } /* * Pass a packet to the higher levels. */ integrate void am7990_read(sc, boff, len) register struct am7990_softc *sc; int boff, len; { struct mbuf *m; struct ether_header *eh; if (len <= sizeof(struct ether_header) || len > ETHERMTU + sizeof(struct ether_header)) { #ifdef LEDEBUG printf("%s: invalid packet size %d; dropping\n", sc->sc_dev.dv_xname, len); #endif ifp->if_ierrors++; return; } /* Pull packet off interface. */ m = am7990_get(sc, boff, len); if (m == 0) { ifp->if_ierrors++; return; } ifp->if_ipackets++; /* We assume that the header fit entirely in one mbuf. */ eh = mtod(m, struct ether_header *); #if NBPFILTER > 0 /* * Check if there's a BPF listener on this interface. * If so, hand off the raw packet to BPF. */ if (ifp->if_bpf) { bpf_mtap(ifp->if_bpf, m); #ifndef LANCE_REVC_BUG /* * 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. */ if ((ifp->if_flags & IFF_PROMISC) != 0 && (eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */ ETHER_CMP(eh->ether_dhost, sc->sc_arpcom.ac_enaddr)) { m_freem(m); return; } #endif } #endif #ifdef LANCE_REVC_BUG /* * The old LANCE (Rev. C) chips have a bug which causes * garbage to be inserted in front of the received packet. * The work-around is to ignore packets with an invalid * destination address (garbage will usually not match). * Of course, this precludes multicast support... */ if (ETHER_CMP(eh->ether_dhost, sc->sc_arpcom.ac_enaddr) && ETHER_CMP(eh->ether_dhost, etherbroadcastaddr)) { m_freem(m); return; } #endif /* Pass the packet up, with the ether header sort-of removed. */ m_adj(m, sizeof(struct ether_header)); ether_input(ifp, eh, m); } integrate void am7990_rint(sc) struct am7990_softc *sc; { register int bix; int rp; struct lermd rmd; bix = sc->sc_last_rd; /* Process all buffers with valid data. */ for (;;) { rp = LE_RMDADDR(sc, bix); (*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd)); if (rmd.rmd1_bits & LE_R1_OWN) break; if (rmd.rmd1_bits & LE_R1_ERR) { if (rmd.rmd1_bits & LE_R1_ENP) { #ifdef LEDEBUG if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) { if (rmd.rmd1_bits & LE_R1_FRAM) printf("%s: framing error\n", sc->sc_dev.dv_xname); if (rmd.rmd1_bits & LE_R1_CRC) printf("%s: crc mismatch\n", sc->sc_dev.dv_xname); } #endif } else { if (rmd.rmd1_bits & LE_R1_OFLO) printf("%s: overflow\n", sc->sc_dev.dv_xname); } if (rmd.rmd1_bits & LE_R1_BUFF) printf("%s: receive buffer error\n", sc->sc_dev.dv_xname); ifp->if_ierrors++; } else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) != (LE_R1_STP | LE_R1_ENP)) { printf("%s: dropping chained buffer\n", sc->sc_dev.dv_xname); ifp->if_ierrors++; } else { #ifdef LEDEBUG if (sc->sc_debug) am7990_recv_print(sc, sc->sc_last_rd); #endif am7990_read(sc, LE_RBUFADDR(sc, bix), (int)rmd.rmd3 - 4); } rmd.rmd1_bits = LE_R1_OWN; rmd.rmd2 = -LEBLEN | LE_XMD2_ONES; rmd.rmd3 = 0; (*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd)); #ifdef LEDEBUG if (sc->sc_debug) printf("sc->sc_last_rd = %x, rmd: " "ladr %04x, hadr %02x, flags %02x, " "bcnt %04x, mcnt %04x\n", sc->sc_last_rd, rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3); #endif if (++bix == sc->sc_nrbuf) bix = 0; } sc->sc_last_rd = bix; } integrate void am7990_tint(sc) register struct am7990_softc *sc; { register int bix; struct letmd tmd; bix = sc->sc_first_td; for (;;) { if (sc->sc_no_td <= 0) break; #ifdef LEDEBUG if (sc->sc_debug) printf("trans tmd: " "ladr %04x, hadr %02x, flags %02x, " "bcnt %04x, mcnt %04x\n", tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3); #endif (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix), sizeof(tmd)); if (tmd.tmd1_bits & LE_T1_OWN) break; ifp->if_flags &= ~IFF_OACTIVE; if (tmd.tmd1_bits & LE_T1_ERR) { if (tmd.tmd3 & LE_T3_BUFF) printf("%s: transmit buffer error\n", sc->sc_dev.dv_xname); else if (tmd.tmd3 & LE_T3_UFLO) printf("%s: underflow\n", sc->sc_dev.dv_xname); if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) { am7990_reset(sc); return; } if (tmd.tmd3 & LE_T3_LCAR) { if (sc->sc_nocarrier) (*sc->sc_nocarrier)(sc); else printf("%s: lost carrier\n", sc->sc_dev.dv_xname); } if (tmd.tmd3 & LE_T3_LCOL) ifp->if_collisions++; if (tmd.tmd3 & LE_T3_RTRY) { printf("%s: excessive collisions, tdr %d\n", sc->sc_dev.dv_xname, tmd.tmd3 & LE_T3_TDR_MASK); ifp->if_collisions += 16; } ifp->if_oerrors++; } else { if (tmd.tmd1_bits & LE_T1_ONE) ifp->if_collisions++; else if (tmd.tmd1_bits & LE_T1_MORE) /* Real number is unknown. */ ifp->if_collisions += 2; ifp->if_opackets++; } if (++bix == sc->sc_ntbuf) bix = 0; --sc->sc_no_td; } sc->sc_first_td = bix; am7990_start(ifp); if (sc->sc_no_td == 0) ifp->if_timer = 0; } /* * Controller interrupt. */ int am7990_intr(arg) register void *arg; { register struct am7990_softc *sc = arg; register u_int16_t isr; isr = (*sc->sc_rdcsr)(sc, LE_CSR0); #ifdef LEDEBUG if (sc->sc_debug) printf("%s: am7990_intr entering with isr=%04x\n", sc->sc_dev.dv_xname, isr); #endif if ((isr & LE_C0_INTR) == 0) return (0); (*sc->sc_wrcsr)(sc, LE_CSR0, isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR | LE_C0_RINT | LE_C0_TINT | LE_C0_IDON)); if (isr & LE_C0_ERR) { if (isr & LE_C0_BABL) { #ifdef LEDEBUG printf("%s: babble\n", sc->sc_dev.dv_xname); #endif ifp->if_oerrors++; } #if 0 if (isr & LE_C0_CERR) { printf("%s: collision error\n", sc->sc_dev.dv_xname); ifp->if_collisions++; } #endif if (isr & LE_C0_MISS) { #ifdef LEDEBUG printf("%s: missed packet\n", sc->sc_dev.dv_xname); #endif ifp->if_ierrors++; } if (isr & LE_C0_MERR) { printf("%s: memory error\n", sc->sc_dev.dv_xname); am7990_reset(sc); return (1); } } if ((isr & LE_C0_RXON) == 0) { printf("%s: receiver disabled\n", sc->sc_dev.dv_xname); ifp->if_ierrors++; am7990_reset(sc); return (1); } if ((isr & LE_C0_TXON) == 0) { printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname); ifp->if_oerrors++; am7990_reset(sc); return (1); } if (isr & LE_C0_RINT) am7990_rint(sc); if (isr & LE_C0_TINT) am7990_tint(sc); return (1); } #undef ifp void am7990_watchdog(ifp) struct ifnet *ifp; { struct am7990_softc *sc = ifp->if_softc; log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); ++ifp->if_oerrors; am7990_reset(sc); } /* * 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. */ void am7990_start(ifp) register struct ifnet *ifp; { register struct am7990_softc *sc = ifp->if_softc; register int bix; register struct mbuf *m; struct letmd tmd; int rp; int len; if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) return; bix = sc->sc_last_td; for (;;) { rp = LE_TMDADDR(sc, bix); (*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd)); if (tmd.tmd1_bits & LE_T1_OWN) { ifp->if_flags |= IFF_OACTIVE; printf("missing buffer, no_td = %d, last_td = %d\n", sc->sc_no_td, sc->sc_last_td); } IF_DEQUEUE(&ifp->if_snd, m); if (m == 0) break; #if NBPFILTER > 0 /* * If BPF is listening on this interface, let it see the packet * before we commit it to the wire. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m); #endif /* * Copy the mbuf chain into the transmit buffer. */ len = am7990_put(sc, LE_TBUFADDR(sc, bix), m); #ifdef LEDEBUG if (len > ETHERMTU + sizeof(struct ether_header)) printf("packet length %d\n", len); #endif ifp->if_timer = 5; /* * Init transmit registers, and set transmit start flag. */ tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP; tmd.tmd2 = -len | LE_XMD2_ONES; tmd.tmd3 = 0; (*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd)); #ifdef LEDEBUG if (sc->sc_debug) am7990_xmit_print(sc, sc->sc_last_td); #endif (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD); if (++bix == sc->sc_ntbuf) bix = 0; if (++sc->sc_no_td == sc->sc_ntbuf) { ifp->if_flags |= IFF_OACTIVE; break; } } sc->sc_last_td = bix; } /* * Process an ioctl request. */ int am7990_ioctl(ifp, cmd, data) register struct ifnet *ifp; u_long cmd; caddr_t data; { register struct am7990_softc *sc = ifp->if_softc; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; s = splimp(); if ((error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data)) > 0) { splx(s); return error; } switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: am7990_init(sc); arp_ifinit(&sc->sc_arpcom, ifa); break; #endif default: am7990_init(sc); break; } 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. */ am7990_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. */ am7990_init(sc); } else { /* * Reset the interface to pick up changes in any other * flags that affect hardware registers. */ /*am7990_stop(sc);*/ am7990_init(sc); } #ifdef LEDEBUG 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. */ am7990_reset(sc); error = 0; } break; default: error = EINVAL; break; } splx(s); return (error); } hide void am7990_shutdown(arg) void *arg; { am7990_stop((struct am7990_softc *)arg); } #ifdef LEDEBUG void am7990_recv_print(sc, no) struct am7990_softc *sc; int no; { struct lermd rmd; u_int16_t len; struct ether_header eh; (*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd)); len = rmd.rmd3; printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no, len); printf("%s: status %04x\n", sc->sc_dev.dv_xname, (*sc->sc_rdcsr)(sc, LE_CSR0)); printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n", sc->sc_dev.dv_xname, rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3); if (len >= sizeof(eh)) { (*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh)); printf("%s: dst %s", sc->sc_dev.dv_xname, ether_sprintf(eh.ether_dhost)); printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost), ntohs(eh.ether_type)); } } void am7990_xmit_print(sc, no) struct am7990_softc *sc; int no; { struct letmd tmd; u_int16_t len; struct ether_header eh; (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd)); len = -tmd.tmd2; printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no, len); printf("%s: status %04x\n", sc->sc_dev.dv_xname, (*sc->sc_rdcsr)(sc, LE_CSR0)); printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n", sc->sc_dev.dv_xname, tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3); if (len >= sizeof(eh)) { (*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh)); printf("%s: dst %s", sc->sc_dev.dv_xname, ether_sprintf(eh.ether_dhost)); printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost), ntohs(eh.ether_type)); } } #endif /* LEDEBUG */ /* * Set up the logical address filter. */ void am7990_setladrf(ac, af) struct arpcom *ac; u_int16_t *af; { struct ifnet *ifp = &ac->ac_if; struct ether_multi *enm; register u_char *cp, c; register u_int32_t 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) goto allmulti; af[0] = af[1] = af[2] = af[3] = 0x0000; ETHER_FIRST_MULTI(step, ac, enm); while (enm != NULL) { if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { /* * 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.) */ goto allmulti; } cp = enm->enm_addrlo; crc = 0xffffffff; for (len = sizeof(enm->enm_addrlo); --len >= 0;) { c = *cp++; for (i = 8; --i >= 0;) { if ((crc & 0x01) ^ (c & 0x01)) { crc >>= 1; crc ^= 0xedb88320; } else crc >>= 1; c >>= 1; } } /* Just want the 6 most significant bits. */ crc >>= 26; /* Set the corresponding bit in the filter. */ af[crc >> 4] |= 1 << (crc & 0xf); ETHER_NEXT_MULTI(step, enm); } ifp->if_flags &= ~IFF_ALLMULTI; return; allmulti: ifp->if_flags |= IFF_ALLMULTI; af[0] = af[1] = af[2] = af[3] = 0xffff; } /* * Routines for accessing the transmit and receive buffers. * The various CPU and adapter configurations supported by this * driver require three different access methods for buffers * and descriptors: * (1) contig (contiguous data; no padding), * (2) gap2 (two bytes of data followed by two bytes of padding), * (3) gap16 (16 bytes of data followed by 16 bytes of padding). */ /* * contig: contiguous data with no padding. * * Buffers may have any alignment. */ void am7990_copytobuf_contig(sc, from, boff, len) struct am7990_softc *sc; void *from; int boff, len; { volatile caddr_t buf = sc->sc_mem; /* * Just call bcopy() to do the work. */ bcopy(from, buf + boff, len); } void am7990_copyfrombuf_contig(sc, to, boff, len) struct am7990_softc *sc; void *to; int boff, len; { volatile caddr_t buf = sc->sc_mem; /* * Just call bcopy() to do the work. */ bcopy(buf + boff, to, len); } void am7990_zerobuf_contig(sc, boff, len) struct am7990_softc *sc; int boff, len; { volatile caddr_t buf = sc->sc_mem; /* * Just let bzero() do the work */ bzero(buf + boff, len); } #if 0 /* * Examples only; duplicate these and tweak (if necessary) in * machine-specific front-ends. */ /* * gap2: two bytes of data followed by two bytes of pad. * * Buffers must be 4-byte aligned. The code doesn't worry about * doing an extra byte. */ void am7990_copytobuf_gap2(sc, fromv, boff, len) struct am7990_softc *sc; void *fromv; int boff; register int len; { volatile caddr_t buf = sc->sc_mem; register caddr_t from = fromv; register volatile u_int16_t *bptr; if (boff & 0x1) { /* handle unaligned first byte */ bptr = ((volatile u_int16_t *)buf) + (boff - 1); *bptr = (*from++ << 8) | (*bptr & 0xff); bptr += 2; len--; } else bptr = ((volatile u_int16_t *)buf) + boff; while (len > 1) { *bptr = (from[1] << 8) | (from[0] & 0xff); bptr += 2; from += 2; len -= 2; } if (len == 1) *bptr = (u_int16_t)*from; } void am7990_copyfrombuf_gap2(sc, tov, boff, len) struct am7990_softc *sc; void *tov; int boff, len; { volatile caddr_t buf = sc->sc_mem; register caddr_t to = tov; register volatile u_int16_t *bptr; register u_int16_t tmp; if (boff & 0x1) { /* handle unaligned first byte */ bptr = ((volatile u_int16_t *)buf) + (boff - 1); *to++ = (*bptr >> 8) & 0xff; bptr += 2; len--; } else bptr = ((volatile u_int16_t *)buf) + boff; while (len > 1) { tmp = *bptr; *to++ = tmp & 0xff; *to++ = (tmp >> 8) & 0xff; bptr += 2; len -= 2; } if (len == 1) *to = *bptr & 0xff; } void am7990_zerobuf_gap2(sc, boff, len) struct am7990_softc *sc; int boff, len; { volatile caddr_t buf = sc->sc_mem; register volatile u_int16_t *bptr; if ((unsigned)boff & 0x1) { bptr = ((volatile u_int16_t *)buf) + (boff - 1); *bptr &= 0xff; bptr += 2; len--; } else bptr = ((volatile u_int16_t *)buf) + boff; while (len > 0) { *bptr = 0; bptr += 2; len -= 2; } } /* * gap16: 16 bytes of data followed by 16 bytes of pad. * * Buffers must be 32-byte aligned. */ void am7990_copytobuf_gap16(sc, fromv, boff, len) struct am7990_softc *sc; void *fromv; int boff; register int len; { volatile caddr_t buf = sc->sc_mem; register caddr_t from = fromv; register caddr_t bptr; register int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = min(len, 16 - boff); while (len > 0) { bcopy(from, bptr + boff, xfer); from += xfer; bptr += 32; boff = 0; len -= xfer; xfer = min(len, 16); } } void am7990_copyfrombuf_gap16(sc, tov, boff, len) struct am7990_softc *sc; void *tov; int boff, len; { volatile caddr_t buf = sc->sc_mem; register caddr_t to = tov; register caddr_t bptr; register int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = min(len, 16 - boff); while (len > 0) { bcopy(bptr + boff, to, xfer); to += xfer; bptr += 32; boff = 0; len -= xfer; xfer = min(len, 16); } } void am7990_zerobuf_gap16(sc, boff, len) struct am7990_softc *sc; int boff, len; { volatile caddr_t buf = sc->sc_mem; register caddr_t bptr; register int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = min(len, 16 - boff); while (len > 0) { bzero(bptr + boff, xfer); bptr += 32; boff = 0; len -= xfer; xfer = min(len, 16); } } #endif /* Example only */