/* $NetBSD: lance.c,v 1.62 2024/11/17 09:28:34 hannken Exp $ */ /*- * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace * Simulation Facility, NASA Ames Research Center. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * 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. 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 __KERNEL_RCSID(0, "$NetBSD: lance.c,v 1.62 2024/11/17 09:28:34 hannken Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(_KERNEL_OPT) #include "opt_ddb.h" #endif #ifdef DDB #define integrate #define hide #else #define integrate static inline #define hide static #endif integrate struct mbuf *lance_get(struct lance_softc *, int, int); hide bool lance_shutdown(device_t, int); int lance_mediachange(struct ifnet *); void lance_mediastatus(struct ifnet *, struct ifmediareq *); static inline uint16_t ether_cmp(void *, void *); void lance_stop(struct ifnet *, int); int lance_ioctl(struct ifnet *, u_long, void *); void lance_watchdog(struct ifnet *); /* * Compare two Ether/802 addresses for equality, inlined and * unrolled for speed. Use this like memcmp(). * * XXX: Add for stuff like this? * XXX: or maybe add it to libkern.h instead? * * "I'd love to have an inline assembler version of this." * XXX: Who wanted that? mycroft? I wrote one, but this * version in C is as good as hand-coded assembly. -gwr * * Please do NOT tweak this without looking at the actual * assembly code generated before and after your tweaks! */ static inline uint16_t ether_cmp(void *one, void *two) { uint16_t *a = (uint16_t *)one; uint16_t *b = (uint16_t *)two; uint16_t diff; #ifdef m68k /* * The post-increment-pointer form produces the best * machine code for m68k. This was carefully tuned * so it compiles to just 8 short (2-byte) op-codes! */ diff = *a++ - *b++; diff |= *a++ - *b++; diff |= *a++ - *b++; #else /* * Most modern CPUs do better with a single expression. * Note that short-cut evaluation is NOT helpful here, * because it just makes the code longer, not faster! */ diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); #endif return (diff); } #define ETHER_CMP ether_cmp #ifdef LANCE_REVC_BUG /* Make sure this is short-aligned, for ether_cmp(). */ static uint16_t bcast_enaddr[3] = { ~0, ~0, ~0 }; #endif void lance_config(struct lance_softc *sc) { int i, nbuf; struct ifnet *ifp = &sc->sc_ethercom.ec_if; /* Initialize ifnet structure. */ strcpy(ifp->if_xname, device_xname(sc->sc_dev)); ifp->if_softc = sc; ifp->if_start = sc->sc_start; ifp->if_ioctl = lance_ioctl; ifp->if_watchdog = lance_watchdog; ifp->if_init = lance_init; ifp->if_stop = lance_stop; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; #ifdef LANCE_REVC_BUG ifp->if_flags &= ~IFF_MULTICAST; #endif IFQ_SET_READY(&ifp->if_snd); /* Initialize ifmedia structures. */ sc->sc_ethercom.ec_ifmedia = &sc->sc_media; ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); if (sc->sc_supmedia != NULL) { for (i = 0; i < sc->sc_nsupmedia; i++) ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 0, NULL); ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); } else { ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_MANUAL, 0, NULL); ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_MANUAL); } 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; case 131072: sc->sc_nrbuf = 64; sc->sc_ntbuf = 16; break; case 262144: sc->sc_nrbuf = 128; sc->sc_ntbuf = 32; break; default: /* weird memory size; cope with it */ nbuf = sc->sc_memsize / LEBLEN; sc->sc_ntbuf = nbuf / 5; sc->sc_nrbuf = nbuf - sc->sc_ntbuf; } aprint_normal(": address %s\n", ether_sprintf(sc->sc_enaddr)); aprint_normal_dev(sc->sc_dev, "%d receive buffers, %d transmit buffers\n", sc->sc_nrbuf, sc->sc_ntbuf); /* Make sure the chip is stopped. */ lance_stop(ifp, 0); /* claim 802.1q capability */ sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; /* Attach the interface. */ if_attach(ifp); ether_ifattach(ifp, sc->sc_enaddr); if (pmf_device_register1(sc->sc_dev, NULL, NULL, lance_shutdown)) pmf_class_network_register(sc->sc_dev, ifp); else aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n"); sc->sc_rbufaddr = malloc(sc->sc_nrbuf * sizeof(int), M_DEVBUF, M_WAITOK); sc->sc_tbufaddr = malloc(sc->sc_ntbuf * sizeof(int), M_DEVBUF, M_WAITOK); rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), RND_TYPE_NET, RND_FLAG_DEFAULT); } void lance_reset(struct lance_softc *sc) { int s; s = splnet(); lance_init(&sc->sc_ethercom.ec_if); splx(s); } void lance_stop(struct ifnet *ifp, int disable) { struct lance_softc *sc = ifp->if_softc; (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); } /* * Initialization of interface; set up initialization block * and transmit/receive descriptor rings. */ int lance_init(struct ifnet *ifp) { struct lance_softc *sc = ifp->if_softc; 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. */ (*sc->sc_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); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; ifp->if_timer = 0; (*sc->sc_start)(ifp); } else printf("%s: controller failed to initialize\n", device_xname(sc->sc_dev)); if (sc->sc_hwinit) (*sc->sc_hwinit)(sc); return (0); } /* * Routine to copy from mbuf chain to transmit buffer in * network buffer memory. */ int lance_put(struct lance_softc *sc, int boff, struct mbuf *m) { struct mbuf *n; int len, tlen = 0; for (; m; m = n) { len = m->m_len; if (len == 0) { n = m_free(m); continue; } (*sc->sc_copytobuf)(sc, mtod(m, void *), boff, len); boff += len; tlen += len; n = m_free(m); } 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 * lance_get(struct lance_softc *sc, int boff, int totlen) { struct mbuf *m, *m0, *newm; int len; MGETHDR(m0, M_DONTWAIT, MT_DATA); if (m0 == 0) return (0); MCLAIM(m0, &sc->sc_ethercom.ec_rx_mowner); m_set_rcvif(m0, &sc->sc_ethercom.ec_if); m0->m_pkthdr.len = totlen; len = MHLEN; m = m0; while (totlen > 0) { if (totlen >= MINCLSIZE) { MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) goto bad; len = MCLBYTES; } if (m == m0) { char *newdata = (char *) ALIGN(m->m_data + sizeof(struct ether_header)) - sizeof(struct ether_header); len -= newdata - m->m_data; m->m_data = newdata; } m->m_len = len = uimin(totlen, len); (*sc->sc_copyfrombuf)(sc, mtod(m, void *), boff, len); boff += len; totlen -= len; if (totlen > 0) { MGET(newm, M_DONTWAIT, MT_DATA); if (newm == 0) goto bad; MCLAIM(newm, &sc->sc_ethercom.ec_rx_mowner); len = MLEN; m = m->m_next = newm; } } return (m0); bad: m_freem(m0); return (0); } /* * Pass a packet to the higher levels. */ void lance_read(struct lance_softc *sc, int boff, int len) { struct mbuf *m; struct ifnet *ifp = &sc->sc_ethercom.ec_if; struct ether_header *eh; if (len <= sizeof(struct ether_header) || len > ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) ? ETHER_VLAN_ENCAP_LEN + ETHERMTU + sizeof(struct ether_header) : ETHERMTU + sizeof(struct ether_header))) { #ifdef LEDEBUG printf("%s: invalid packet size %d; dropping\n", device_xname(sc->sc_dev), len); #endif if_statinc(ifp, if_ierrors); return; } /* Pull packet off interface. */ m = lance_get(sc, boff, len); if (m == 0) { if_statinc(ifp, if_ierrors); return; } eh = mtod(m, struct ether_header *); #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_enaddr) && ETHER_CMP(eh->ether_dhost, bcast_enaddr)) { m_freem(m); return; } #endif /* * Some lance device does not present IFF_SIMPLEX behavior on multicast * packets. Make sure to drop it if it is from ourselves. */ if (!ETHER_CMP(eh->ether_shost, sc->sc_enaddr)) { m_freem(m); return; } /* Pass the packet up. */ if_percpuq_enqueue(ifp->if_percpuq, m); } #undef ifp void lance_watchdog(struct ifnet *ifp) { struct lance_softc *sc = ifp->if_softc; log(LOG_ERR, "%s: device timeout\n", device_xname(sc->sc_dev)); if_statinc(ifp, if_oerrors); lance_reset(sc); } int lance_mediachange(struct ifnet *ifp) { struct lance_softc *sc = ifp->if_softc; if (sc->sc_mediachange) return ((*sc->sc_mediachange)(sc)); return (0); } void lance_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) { struct lance_softc *sc = ifp->if_softc; if ((ifp->if_flags & IFF_UP) == 0) return; ifmr->ifm_status = IFM_AVALID; if (sc->sc_havecarrier) ifmr->ifm_status |= IFM_ACTIVE; if (sc->sc_mediastatus) (*sc->sc_mediastatus)(sc, ifmr); } /* * Process an ioctl request. */ int lance_ioctl(struct ifnet *ifp, u_long cmd, void *data) { struct lance_softc *sc = ifp->if_softc; int s, error = 0; s = splnet(); switch (cmd) { default: if ((error = ether_ioctl(ifp, cmd, data)) != ENETRESET) break; error = 0; if (cmd != SIOCADDMULTI && cmd != SIOCDELMULTI) break; if (ifp->if_flags & IFF_RUNNING) { /* * Multicast list has changed; set the hardware filter * accordingly. */ lance_reset(sc); } break; } splx(s); return (error); } hide bool lance_shutdown(device_t self, int howto) { struct lance_softc *sc = device_private(self); struct ifnet *ifp = &sc->sc_ethercom.ec_if; lance_stop(ifp, 0); return true; } /* * Set up the logical address filter. */ void lance_setladrf(struct ethercom *ec, uint16_t *af) { struct ifnet *ifp = &ec->ec_if; struct ether_multi *enm; uint32_t crc; 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_LOCK(ec); ETHER_FIRST_MULTI(step, ec, 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.) */ ETHER_UNLOCK(ec); goto allmulti; } crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); /* 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); } ETHER_UNLOCK(ec); 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 lance_copytobuf_contig(struct lance_softc *sc, void *from, int boff, int len) { uint8_t *buf = sc->sc_mem; /* * Just call memcpy() to do the work. */ memcpy(buf + boff, from, len); } void lance_copyfrombuf_contig(struct lance_softc *sc, void *to, int boff, int len) { uint8_t *buf = sc->sc_mem; /* * Just call memcpy() to do the work. */ memcpy(to, buf + boff, len); } void lance_zerobuf_contig(struct lance_softc *sc, int boff, int len) { uint8_t *buf = sc->sc_mem; /* * Just let memset() do the work */ memset(buf + boff, 0, 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 lance_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len) { volatile void *buf = sc->sc_mem; void *from = fromv; volatile uint16_t *bptr; if (boff & 0x1) { /* handle unaligned first byte */ bptr = ((volatile uint16_t *)buf) + (boff - 1); *bptr = (*from++ << 8) | (*bptr & 0xff); bptr += 2; len--; } else bptr = ((volatile uint16_t *)buf) + boff; while (len > 1) { *bptr = (from[1] << 8) | (from[0] & 0xff); bptr += 2; from += 2; len -= 2; } if (len == 1) *bptr = (uint16_t)*from; } void lance_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len) { volatile void *buf = sc->sc_mem; void *to = tov; volatile uint16_t *bptr; uint16_t tmp; if (boff & 0x1) { /* handle unaligned first byte */ bptr = ((volatile uint16_t *)buf) + (boff - 1); *to++ = (*bptr >> 8) & 0xff; bptr += 2; len--; } else bptr = ((volatile uint16_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 lance_zerobuf_gap2(struct lance_softc *sc, int boff, int len) { volatile void *buf = sc->sc_mem; volatile uint16_t *bptr; if ((unsigned int)boff & 0x1) { bptr = ((volatile uint16_t *)buf) + (boff - 1); *bptr &= 0xff; bptr += 2; len--; } else bptr = ((volatile uint16_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 lance_copytobuf_gap16(struct lance_softc *sc, void *fromv, int boff, int len) { volatile uint8_t *buf = sc->sc_mem; void *from = fromv; uint8_t *bptr; int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = uimin(len, 16 - boff); while (len > 0) { memcpy(bptr + boff, from, xfer); from += xfer; bptr += 32; boff = 0; len -= xfer; xfer = uimin(len, 16); } } void lance_copyfrombuf_gap16(struct lance_softc *sc, void *tov, int boff, int len) { volatile uint8_t *buf = sc->sc_mem; void *to = tov; uint8_t *bptr; int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = uimin(len, 16 - boff); while (len > 0) { memcpy(to, bptr + boff, xfer); to += xfer; bptr += 32; boff = 0; len -= xfer; xfer = uimin(len, 16); } } void lance_zerobuf_gap16(struct lance_softc *sc, int boff, int len) { volatile uint8_t *buf = sc->sc_mem; uint8_t *bptr; int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = uimin(len, 16 - boff); while (len > 0) { memset(bptr + boff, 0, xfer); bptr += 32; boff = 0; len -= xfer; xfer = uimin(len, 16); } } #endif /* Example only */