/* $NetBSD: lance.c,v 1.34 2005/12/24 20:27:30 perry Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void lance_start(if_t); static void lance_stop(struct lance_softc *); static void lance_init(void *); static void lance_watchdog(void *s); static int lance_mediachange(if_t); static void lance_mediastatus(if_t, struct ifmediareq *); static int lance_ioctl(if_t, u_long, caddr_t); int lance_config(struct lance_softc *sc, const char* name, int unit) { if_t ifp; int i, nbuf; if (LE_LOCK_INITIALIZED(sc) == 0) return (ENXIO); ifp = sc->sc_ifp = if_alloc(IFT_ETHER); callout_init_mtx(&sc->sc_wdog_ch, &sc->sc_mtx, 0); /* Initialize ifnet structure. */ if_setsoftc(ifp, sc); if_initname(ifp, name, unit); if_setstartfn(ifp, lance_start); if_setioctlfn(ifp, lance_ioctl); if_setinitfn(ifp, lance_init); if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); #ifdef LANCE_REVC_BUG if_setflagsbit(ifp, 0, IFF_MULTICAST); #endif if_setbaudrate(ifp, IF_Mbps(10)); if_setsendqlen(ifp, ifqmaxlen); if_setsendqready(ifp); /* Initialize ifmedia structures. */ 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_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0), 0, NULL); ifmedia_set(&sc->sc_media, IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0)); } 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; } if_printf(ifp, "%d receive buffers, %d transmit buffers\n", sc->sc_nrbuf, sc->sc_ntbuf); /* Make sure the chip is stopped. */ LE_LOCK(sc); lance_stop(sc); LE_UNLOCK(sc); return (0); } void lance_attach(struct lance_softc *sc) { if_t ifp = sc->sc_ifp; /* Attach the interface. */ ether_ifattach(ifp, sc->sc_enaddr); /* Claim 802.1q capability. */ if_setifheaderlen(ifp, sizeof(struct ether_vlan_header)); if_setcapabilitiesbit(ifp, IFCAP_VLAN_MTU, 0); if_setcapenablebit(ifp, IFCAP_VLAN_MTU, 0); gone_in(15, "le: 10/100 NIC no longer needed for Qemu/MIPS"); } void lance_detach(struct lance_softc *sc) { if_t ifp = sc->sc_ifp; LE_LOCK(sc); lance_stop(sc); LE_UNLOCK(sc); callout_drain(&sc->sc_wdog_ch); ether_ifdetach(ifp); if_free(ifp); } void lance_suspend(struct lance_softc *sc) { LE_LOCK(sc); lance_stop(sc); LE_UNLOCK(sc); } void lance_resume(struct lance_softc *sc) { LE_LOCK(sc); if (if_getflags(sc->sc_ifp) & IFF_UP) lance_init_locked(sc); LE_UNLOCK(sc); } static void lance_start(if_t ifp) { struct lance_softc *sc = if_getsoftc(ifp); LE_LOCK(sc); (*sc->sc_start_locked)(sc); LE_UNLOCK(sc); } static void lance_stop(struct lance_softc *sc) { if_t ifp = sc->sc_ifp; LE_LOCK_ASSERT(sc, MA_OWNED); /* * Mark the interface down and cancel the watchdog timer. */ if_setdrvflagbits(ifp, 0, (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)); callout_stop(&sc->sc_wdog_ch); sc->sc_wdog_timer = 0; (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); } static void lance_init(void *xsc) { struct lance_softc *sc = (struct lance_softc *)xsc; LE_LOCK(sc); lance_init_locked(sc); LE_UNLOCK(sc); } /* * Initialization of interface; set up initialization block * and transmit/receive descriptor rings. */ void lance_init_locked(struct lance_softc *sc) { if_t ifp = sc->sc_ifp; u_long a; int timo; LE_LOCK_ASSERT(sc, MA_OWNED); (*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 the current media. This may require the chip to be stopped. */ if (sc->sc_mediachange) (void)(*sc->sc_mediachange)(sc); /* * Update our private copy of the Ethernet address. * We NEED the copy so we can ensure its alignment! */ memcpy(sc->sc_enaddr, if_getlladdr(ifp), ETHER_ADDR_LEN); /* 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 & 0xffff); (*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); if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0); if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE); sc->sc_wdog_timer = 0; callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc); (*sc->sc_start_locked)(sc); } else if_printf(ifp, "controller failed to initialize\n"); if (sc->sc_hwinit) (*sc->sc_hwinit)(sc); } /* * 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; LE_LOCK_ASSERT(sc, MA_OWNED); for (; m; m = n) { len = m->m_len; if (len == 0) { n = m_free(m); m = NULL; continue; } (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); boff += len; tlen += len; n = m_free(m); m = NULL; } 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. */ struct mbuf * lance_get(struct lance_softc *sc, int boff, int totlen) { if_t ifp = sc->sc_ifp; struct mbuf *m, *m0, *newm; caddr_t newdata; int len; if (totlen <= ETHER_HDR_LEN || totlen > LEBLEN - ETHER_CRC_LEN) { #ifdef LEDEBUG if_printf(ifp, "invalid packet size %d; dropping\n", totlen); #endif return (NULL); } MGETHDR(m0, M_NOWAIT, MT_DATA); if (m0 == NULL) return (NULL); m0->m_pkthdr.rcvif = ifp; m0->m_pkthdr.len = totlen; len = MHLEN; m = m0; while (totlen > 0) { if (totlen >= MINCLSIZE) { if (!(MCLGET(m, M_NOWAIT))) goto bad; len = MCLBYTES; } if (m == m0) { newdata = (caddr_t) ALIGN(m->m_data + ETHER_HDR_LEN) - ETHER_HDR_LEN; len -= newdata - m->m_data; m->m_data = newdata; } m->m_len = len = min(totlen, len); (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); boff += len; totlen -= len; if (totlen > 0) { MGET(newm, M_NOWAIT, MT_DATA); if (newm == NULL) goto bad; len = MLEN; m = m->m_next = newm; } } return (m0); bad: m_freem(m0); return (NULL); } static void lance_watchdog(void *xsc) { struct lance_softc *sc = (struct lance_softc *)xsc; if_t ifp = sc->sc_ifp; LE_LOCK_ASSERT(sc, MA_OWNED); if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) { callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc); return; } if_printf(ifp, "device timeout\n"); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); lance_init_locked(sc); } static int lance_mediachange(if_t ifp) { struct lance_softc *sc = if_getsoftc(ifp); if (sc->sc_mediachange) { /* * For setting the port in LE_CSR15 the PCnet chips must * be powered down or stopped and unlike documented may * not take effect without an initialization. So don't * invoke (*sc_mediachange) directly here but go through * lance_init_locked(). */ LE_LOCK(sc); lance_stop(sc); lance_init_locked(sc); if (!if_sendq_empty(ifp)) (*sc->sc_start_locked)(sc); LE_UNLOCK(sc); } return (0); } static void lance_mediastatus(if_t ifp, struct ifmediareq *ifmr) { struct lance_softc *sc = if_getsoftc(ifp); LE_LOCK(sc); if (!(if_getflags(ifp) & IFF_UP)) { LE_UNLOCK(sc); return; } ifmr->ifm_status = IFM_AVALID; if (sc->sc_flags & LE_CARRIER) ifmr->ifm_status |= IFM_ACTIVE; if (sc->sc_mediastatus) (*sc->sc_mediastatus)(sc, ifmr); LE_UNLOCK(sc); } /* * Process an ioctl request. */ static int lance_ioctl(if_t ifp, u_long cmd, caddr_t data) { struct lance_softc *sc = if_getsoftc(ifp); struct ifreq *ifr = (struct ifreq *)data; int error = 0; switch (cmd) { case SIOCSIFFLAGS: LE_LOCK(sc); if (if_getflags(ifp) & IFF_PROMISC) { if (!(sc->sc_flags & LE_PROMISC)) { sc->sc_flags |= LE_PROMISC; lance_init_locked(sc); } } else if (sc->sc_flags & LE_PROMISC) { sc->sc_flags &= ~LE_PROMISC; lance_init_locked(sc); } if ((if_getflags(ifp) & IFF_ALLMULTI) && !(sc->sc_flags & LE_ALLMULTI)) { sc->sc_flags |= LE_ALLMULTI; lance_init_locked(sc); } else if (!(if_getflags(ifp) & IFF_ALLMULTI) && (sc->sc_flags & LE_ALLMULTI)) { sc->sc_flags &= ~LE_ALLMULTI; lance_init_locked(sc); } if (!(if_getflags(ifp) & IFF_UP) && if_getdrvflags(ifp) & IFF_DRV_RUNNING) { /* * If interface is marked down and it is running, then * stop it. */ lance_stop(sc); } else if (if_getflags(ifp) & IFF_UP && !(if_getdrvflags(ifp) & IFF_DRV_RUNNING)) { /* * If interface is marked up and it is stopped, then * start it. */ lance_init_locked(sc); } #ifdef LEDEBUG if (if_getflags(ifp) & IFF_DEBUG) sc->sc_flags |= LE_DEBUG; else sc->sc_flags &= ~LE_DEBUG; #endif LE_UNLOCK(sc); break; case SIOCADDMULTI: case SIOCDELMULTI: /* * Multicast list has changed; set the hardware filter * accordingly. */ LE_LOCK(sc); if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) lance_init_locked(sc); LE_UNLOCK(sc); break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); break; default: error = ether_ioctl(ifp, cmd, data); break; } return (error); } struct lance_hash_maddr_ctx { struct lance_softc *sc; uint16_t *af; }; static u_int lance_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) { struct lance_hash_maddr_ctx *ctx = arg; struct lance_softc *sc = ctx->sc; uint32_t crc; crc = ether_crc32_le(LLADDR(sdl), ETHER_ADDR_LEN); /* Just want the 6 most significant bits. */ crc >>= 26; /* Set the corresponding bit in the filter. */ ctx->af[crc >> 4] |= LE_HTOLE16(1 << (crc & 0xf)); return (1); } /* * Set up the logical address filter. */ void lance_setladrf(struct lance_softc *sc, uint16_t *af) { if_t ifp = sc->sc_ifp; struct lance_hash_maddr_ctx ctx = { sc, af }; /* * 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 (if_getflags(ifp) & IFF_PROMISC || sc->sc_flags & LE_ALLMULTI) { af[0] = af[1] = af[2] = af[3] = 0xffff; return; } af[0] = af[1] = af[2] = af[3] = 0x0000; if_foreach_llmaddr(ifp, lance_hash_maddr, &ctx); } /* * 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) { volatile caddr_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) { volatile caddr_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) { volatile caddr_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. */ static void lance_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len) { volatile caddr_t buf = sc->sc_mem; caddr_t 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; } static void lance_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len) { volatile caddr_t buf = sc->sc_mem; caddr_t 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; } static void lance_zerobuf_gap2(struct lance_softc *sc, int boff, int len) { volatile caddr_t buf = sc->sc_mem; volatile uint16_t *bptr; if ((unsigned)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. */ static void lance_copytobuf_gap16(struct lance_softc *sc, void *fromv, int boff, int len) { volatile caddr_t buf = sc->sc_mem; caddr_t bptr, from = fromv; int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = min(len, 16 - boff); while (len > 0) { memcpy(bptr + boff, from, xfer); from += xfer; bptr += 32; boff = 0; len -= xfer; xfer = min(len, 16); } } static void lance_copyfrombuf_gap16(struct lance_softc *sc, void *tov, int boff, int len) { volatile caddr_t buf = sc->sc_mem; caddr_t bptr, to = tov; int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = min(len, 16 - boff); while (len > 0) { memcpy(to, bptr + boff, xfer); to += xfer; bptr += 32; boff = 0; len -= xfer; xfer = min(len, 16); } } static void lance_zerobuf_gap16(struct lance_softc *sc, int boff, int len) { volatile caddr_t buf = sc->sc_mem; caddr_t bptr; int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = min(len, 16 - boff); while (len > 0) { memset(bptr + boff, 0, xfer); bptr += 32; boff = 0; len -= xfer; xfer = min(len, 16); } } #endif /* Example only */