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fc64bae41b
in order to avoid races accessing if_timer.
628 lines
16 KiB
C
628 lines
16 KiB
C
/* $NetBSD: am7990.c,v 1.68 2005/12/11 12:21:25 christos Exp $ */
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/*-
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* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
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* Simulation Facility, NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell and Rick Macklem.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_le.c 8.2 (Berkeley) 11/16/93
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/lock.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/socket.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_var.h>
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#include <machine/bus.h>
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#include <dev/le/lancereg.h>
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#include <dev/le/lancevar.h>
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#include <dev/le/am7990reg.h>
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#include <dev/le/am7990var.h>
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static void am7990_meminit(struct lance_softc *);
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static void am7990_rint(struct lance_softc *);
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static void am7990_tint(struct lance_softc *);
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static void am7990_start_locked(struct lance_softc *sc);
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#ifdef LEDEBUG
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static void am7990_recv_print(struct lance_softc *, int);
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static void am7990_xmit_print(struct lance_softc *, int);
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#endif
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int
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am7990_config(struct am7990_softc *sc, const char* name, int unit)
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{
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int error, mem;
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sc->lsc.sc_meminit = am7990_meminit;
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sc->lsc.sc_start_locked = am7990_start_locked;
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error = lance_config(&sc->lsc, name, unit);
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if (error != 0)
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return (error);
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mem = 0;
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sc->lsc.sc_initaddr = mem;
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mem += sizeof(struct leinit);
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sc->lsc.sc_rmdaddr = mem;
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mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
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sc->lsc.sc_tmdaddr = mem;
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mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
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sc->lsc.sc_rbufaddr = mem;
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mem += LEBLEN * sc->lsc.sc_nrbuf;
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sc->lsc.sc_tbufaddr = mem;
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mem += LEBLEN * sc->lsc.sc_ntbuf;
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if (mem > sc->lsc.sc_memsize)
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panic("%s: memsize", __func__);
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lance_attach(&sc->lsc);
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return (0);
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}
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void
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am7990_detach(struct am7990_softc *sc)
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{
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lance_detach(&sc->lsc);
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}
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/*
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* Set up the initialization block and the descriptor rings.
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*/
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static void
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am7990_meminit(struct lance_softc *sc)
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{
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struct ifnet *ifp = sc->sc_ifp;
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struct leinit init;
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struct lermd rmd;
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struct letmd tmd;
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u_long a;
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int bix;
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LE_LOCK_ASSERT(sc, MA_OWNED);
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if (ifp->if_flags & IFF_PROMISC)
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init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
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else
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init.init_mode = LE_MODE_NORMAL;
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init.init_padr[0] = (sc->sc_enaddr[1] << 8) | sc->sc_enaddr[0];
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init.init_padr[1] = (sc->sc_enaddr[3] << 8) | sc->sc_enaddr[2];
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init.init_padr[2] = (sc->sc_enaddr[5] << 8) | sc->sc_enaddr[4];
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lance_setladrf(sc, init.init_ladrf);
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sc->sc_last_rd = 0;
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sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
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a = sc->sc_addr + LE_RMDADDR(sc, 0);
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init.init_rdra = a;
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init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
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a = sc->sc_addr + LE_TMDADDR(sc, 0);
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init.init_tdra = a;
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init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
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(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
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/*
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* Set up receive ring descriptors.
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*/
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for (bix = 0; bix < sc->sc_nrbuf; bix++) {
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a = sc->sc_addr + LE_RBUFADDR(sc, bix);
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rmd.rmd0 = a;
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rmd.rmd1_hadr = a >> 16;
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rmd.rmd1_bits = LE_R1_OWN;
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rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
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rmd.rmd3 = 0;
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(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
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sizeof(rmd));
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}
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/*
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* Set up transmit ring descriptors.
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*/
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for (bix = 0; bix < sc->sc_ntbuf; bix++) {
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a = sc->sc_addr + LE_TBUFADDR(sc, bix);
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tmd.tmd0 = a;
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tmd.tmd1_hadr = a >> 16;
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tmd.tmd1_bits = 0;
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tmd.tmd2 = LE_XMD2_ONES;
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tmd.tmd3 = 0;
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(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
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sizeof(tmd));
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}
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}
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static void
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am7990_rint(struct lance_softc *sc)
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{
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struct ifnet *ifp = sc->sc_ifp;
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struct mbuf *m;
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struct lermd rmd;
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int bix, rp;
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#if defined(LANCE_REVC_BUG)
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struct ether_header *eh;
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/* Make sure this is short-aligned, for ether_cmp(). */
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static uint16_t bcast_enaddr[3] = { ~0, ~0, ~0 };
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#endif
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bix = sc->sc_last_rd;
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/* Process all buffers with valid data. */
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for (;;) {
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rp = LE_RMDADDR(sc, bix);
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(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
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if (rmd.rmd1_bits & LE_R1_OWN)
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break;
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m = NULL;
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if ((rmd.rmd1_bits & (LE_R1_ERR | LE_R1_STP | LE_R1_ENP)) !=
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(LE_R1_STP | LE_R1_ENP)) {
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if (rmd.rmd1_bits & LE_R1_ERR) {
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#ifdef LEDEBUG
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if (rmd.rmd1_bits & LE_R1_ENP) {
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if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
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if (rmd.rmd1_bits & LE_R1_FRAM)
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if_printf(ifp,
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"framing error\n");
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if (rmd.rmd1_bits & LE_R1_CRC)
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if_printf(ifp,
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"crc mismatch\n");
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}
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} else
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if (rmd.rmd1_bits & LE_R1_OFLO)
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if_printf(ifp, "overflow\n");
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#endif
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if (rmd.rmd1_bits & LE_R1_BUFF)
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if_printf(ifp,
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"receive buffer error\n");
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} else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
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(LE_R1_STP | LE_R1_ENP))
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if_printf(ifp, "dropping chained buffer\n");
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} else {
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#ifdef LEDEBUG
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if (sc->sc_flags & LE_DEBUG)
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am7990_recv_print(sc, bix);
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#endif
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/* Pull the packet off the interface. */
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m = lance_get(sc, LE_RBUFADDR(sc, bix),
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(int)rmd.rmd3 - ETHER_CRC_LEN);
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}
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rmd.rmd1_bits = LE_R1_OWN;
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rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
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rmd.rmd3 = 0;
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(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
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if (++bix == sc->sc_nrbuf)
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bix = 0;
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if (m != NULL) {
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ifp->if_ipackets++;
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#ifdef LANCE_REVC_BUG
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/*
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* The old LANCE (Rev. C) chips have a bug which
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* causes garbage to be inserted in front of the
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* received packet. The workaround is to ignore
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* packets with an invalid destination address
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* (garbage will usually not match).
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* Of course, this precludes multicast support...
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*/
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eh = mtod(m, struct ether_header *);
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if (ether_cmp(eh->ether_dhost, sc->sc_enaddr) &&
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ether_cmp(eh->ether_dhost, bcast_enaddr)) {
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m_freem(m);
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continue;
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}
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#endif
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/* Pass the packet up. */
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LE_UNLOCK(sc);
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(*ifp->if_input)(ifp, m);
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LE_LOCK(sc);
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} else
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ifp->if_ierrors++;
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}
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sc->sc_last_rd = bix;
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}
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static void
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am7990_tint(struct lance_softc *sc)
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{
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struct ifnet *ifp = sc->sc_ifp;
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struct letmd tmd;
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int bix;
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bix = sc->sc_first_td;
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for (;;) {
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if (sc->sc_no_td <= 0)
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break;
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(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
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sizeof(tmd));
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#ifdef LEDEBUG
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if (sc->sc_flags & LE_DEBUG)
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if_printf(ifp, "trans tmd: "
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"ladr %04x, hadr %02x, flags %02x, "
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"bcnt %04x, mcnt %04x\n",
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tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
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tmd.tmd2, tmd.tmd3);
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#endif
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if (tmd.tmd1_bits & LE_T1_OWN)
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break;
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ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
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if (tmd.tmd1_bits & LE_T1_ERR) {
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if (tmd.tmd3 & LE_T3_BUFF)
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if_printf(ifp, "transmit buffer error\n");
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else if (tmd.tmd3 & LE_T3_UFLO)
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if_printf(ifp, "underflow\n");
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if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
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lance_init_locked(sc);
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return;
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}
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if (tmd.tmd3 & LE_T3_LCAR) {
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if (sc->sc_flags & LE_CARRIER)
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if_link_state_change(ifp,
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LINK_STATE_DOWN);
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sc->sc_flags &= ~LE_CARRIER;
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if (sc->sc_nocarrier)
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(*sc->sc_nocarrier)(sc);
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else
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if_printf(ifp, "lost carrier\n");
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}
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if (tmd.tmd3 & LE_T3_LCOL)
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ifp->if_collisions++;
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if (tmd.tmd3 & LE_T3_RTRY) {
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#ifdef LEDEBUG
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if_printf(ifp, "excessive collisions, tdr %d\n",
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tmd.tmd3 & LE_T3_TDR_MASK);
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#endif
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ifp->if_collisions += 16;
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}
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ifp->if_oerrors++;
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} else {
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if (tmd.tmd1_bits & LE_T1_ONE)
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ifp->if_collisions++;
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else if (tmd.tmd1_bits & LE_T1_MORE)
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/* Real number is unknown. */
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ifp->if_collisions += 2;
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ifp->if_opackets++;
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}
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if (++bix == sc->sc_ntbuf)
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bix = 0;
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--sc->sc_no_td;
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}
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sc->sc_first_td = bix;
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sc->sc_wdog_timer = sc->sc_no_td > 0 ? 5 : 0;
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}
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/*
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* Controller interrupt
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*/
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void
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am7990_intr(void *arg)
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{
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struct lance_softc *sc = arg;
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struct ifnet *ifp = sc->sc_ifp;
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uint16_t isr;
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LE_LOCK(sc);
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if (sc->sc_hwintr && (*sc->sc_hwintr)(sc) == -1) {
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ifp->if_ierrors++;
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lance_init_locked(sc);
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LE_UNLOCK(sc);
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return;
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}
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isr = (*sc->sc_rdcsr)(sc, LE_CSR0);
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#if defined(LEDEBUG) && LEDEBUG > 1
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if (sc->sc_flags & LE_DEBUG)
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if_printf(ifp, "%s: entering with isr=%04x\n", __func__, isr);
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#endif
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if ((isr & LE_C0_INTR) == 0) {
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LE_UNLOCK(sc);
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return;
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}
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/*
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* Clear interrupt source flags and turn off interrupts. If we
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* don't clear these flags before processing their sources we
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* could completely miss some interrupt events as the NIC can
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* change these flags while we're in this handler. We turn off
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* interrupts so we don't get another RX interrupt while still
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* processing the previous one in ifp->if_input() with the
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* driver lock dropped.
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*/
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(*sc->sc_wrcsr)(sc, LE_CSR0, isr & ~(LE_C0_INEA | LE_C0_TDMD |
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LE_C0_STOP | LE_C0_STRT | LE_C0_INIT));
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if (isr & LE_C0_ERR) {
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if (isr & LE_C0_BABL) {
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#ifdef LEDEBUG
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if_printf(ifp, "babble\n");
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#endif
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ifp->if_oerrors++;
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}
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#if 0
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if (isr & LE_C0_CERR) {
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if_printf(ifp, "collision error\n");
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ifp->if_collisions++;
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}
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#endif
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if (isr & LE_C0_MISS) {
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#ifdef LEDEBUG
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if_printf(ifp, "missed packet\n");
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#endif
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ifp->if_ierrors++;
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}
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if (isr & LE_C0_MERR) {
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if_printf(ifp, "memory error\n");
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lance_init_locked(sc);
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LE_UNLOCK(sc);
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return;
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}
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}
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if ((isr & LE_C0_RXON) == 0) {
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if_printf(ifp, "receiver disabled\n");
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ifp->if_ierrors++;
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lance_init_locked(sc);
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LE_UNLOCK(sc);
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return;
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}
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if ((isr & LE_C0_TXON) == 0) {
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if_printf(ifp, "transmitter disabled\n");
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ifp->if_oerrors++;
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lance_init_locked(sc);
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LE_UNLOCK(sc);
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return;
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}
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/*
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* Pretend we have carrier; if we don't this will be cleared shortly.
|
|
*/
|
|
if (!(sc->sc_flags & LE_CARRIER))
|
|
if_link_state_change(ifp, LINK_STATE_UP);
|
|
sc->sc_flags |= LE_CARRIER;
|
|
|
|
if (isr & LE_C0_RINT)
|
|
am7990_rint(sc);
|
|
if (isr & LE_C0_TINT)
|
|
am7990_tint(sc);
|
|
|
|
/* Enable interrupts again. */
|
|
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
|
|
|
|
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
|
|
am7990_start_locked(sc);
|
|
|
|
LE_UNLOCK(sc);
|
|
}
|
|
|
|
/*
|
|
* Set up output on interface.
|
|
* Get another datagram to send off of the interface queue, and map it to the
|
|
* interface before starting the output.
|
|
*/
|
|
static void
|
|
am7990_start_locked(struct lance_softc *sc)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
struct letmd tmd;
|
|
struct mbuf *m;
|
|
int bix, enq, len, rp;
|
|
|
|
LE_LOCK_ASSERT(sc, MA_OWNED);
|
|
|
|
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
|
|
IFF_DRV_RUNNING)
|
|
return;
|
|
|
|
bix = sc->sc_last_td;
|
|
enq = 0;
|
|
|
|
for (; sc->sc_no_td < sc->sc_ntbuf &&
|
|
!IFQ_DRV_IS_EMPTY(&ifp->if_snd);) {
|
|
rp = LE_TMDADDR(sc, bix);
|
|
(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
|
|
|
|
if (tmd.tmd1_bits & LE_T1_OWN) {
|
|
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
|
|
if_printf(ifp,
|
|
"missing buffer, no_td = %d, last_td = %d\n",
|
|
sc->sc_no_td, sc->sc_last_td);
|
|
}
|
|
|
|
IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
|
|
if (m == 0)
|
|
break;
|
|
|
|
/*
|
|
* If BPF is listening on this interface, let it see the packet
|
|
* before we commit it to the wire.
|
|
*/
|
|
BPF_MTAP(ifp, m);
|
|
|
|
/*
|
|
* Copy the mbuf chain into the transmit buffer.
|
|
*/
|
|
len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
|
|
|
|
#ifdef LEDEBUG
|
|
if (len > ETHERMTU + ETHER_HDR_LEN)
|
|
if_printf(ifp, "packet length %d\n", len);
|
|
#endif
|
|
|
|
/*
|
|
* 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_flags & LE_DEBUG)
|
|
am7990_xmit_print(sc, bix);
|
|
#endif
|
|
|
|
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
|
|
enq++;
|
|
|
|
if (++bix == sc->sc_ntbuf)
|
|
bix = 0;
|
|
|
|
if (++sc->sc_no_td == sc->sc_ntbuf) {
|
|
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
sc->sc_last_td = bix;
|
|
|
|
if (enq > 0)
|
|
sc->sc_wdog_timer = 5;
|
|
}
|
|
|
|
#ifdef LEDEBUG
|
|
static void
|
|
am7990_recv_print(struct lance_softc *sc, int no)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
struct ether_header eh;
|
|
struct lermd rmd;
|
|
uint16_t len;
|
|
|
|
(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
|
|
len = rmd.rmd3;
|
|
if_printf(ifp, "receive buffer %d, len = %d\n", no, len);
|
|
if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
|
|
if_printf(ifp,
|
|
"ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
|
|
rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
|
|
if (len - ETHER_CRC_LEN >= sizeof(eh)) {
|
|
(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
|
|
if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
|
|
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
|
|
ntohs(eh.ether_type));
|
|
}
|
|
}
|
|
|
|
static void
|
|
am7990_xmit_print(struct lance_softc *sc, int no)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
struct ether_header eh;
|
|
struct letmd tmd;
|
|
uint16_t len;
|
|
|
|
(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
|
|
len = -tmd.tmd2;
|
|
if_printf(ifp, "transmit buffer %d, len = %d\n", no, len);
|
|
if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
|
|
if_printf(ifp,
|
|
"ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
|
|
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));
|
|
if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
|
|
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
|
|
ntohs(eh.ether_type));
|
|
}
|
|
}
|
|
#endif /* LEDEBUG */
|