823 lines
19 KiB
C
823 lines
19 KiB
C
/* $NetBSD: lance.c,v 1.34 2005/12/24 20:27:30 perry Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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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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*
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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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#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/kernel.h>
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#include <sys/malloc.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 <sys/sockio.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_var.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_types.h>
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#include <net/if_vlan_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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static void lance_start(if_t);
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static void lance_stop(struct lance_softc *);
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static void lance_init(void *);
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static void lance_watchdog(void *s);
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static int lance_mediachange(if_t);
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static void lance_mediastatus(if_t, struct ifmediareq *);
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static int lance_ioctl(if_t, u_long, caddr_t);
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int
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lance_config(struct lance_softc *sc, const char* name, int unit)
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{
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if_t ifp;
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int i, nbuf;
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if (LE_LOCK_INITIALIZED(sc) == 0)
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return (ENXIO);
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ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
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if (ifp == NULL)
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return (ENOSPC);
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callout_init_mtx(&sc->sc_wdog_ch, &sc->sc_mtx, 0);
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/* Initialize ifnet structure. */
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if_setsoftc(ifp, sc);
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if_initname(ifp, name, unit);
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if_setstartfn(ifp, lance_start);
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if_setioctlfn(ifp, lance_ioctl);
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if_setinitfn(ifp, lance_init);
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if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
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#ifdef LANCE_REVC_BUG
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if_setflagsbit(ifp, 0, IFF_MULTICAST);
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#endif
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if_setbaudrate(ifp, IF_Mbps(10));
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if_setsendqlen(ifp, ifqmaxlen);
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if_setsendqready(ifp);
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/* Initialize ifmedia structures. */
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ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus);
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if (sc->sc_supmedia != NULL) {
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for (i = 0; i < sc->sc_nsupmedia; i++)
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ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 0, NULL);
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ifmedia_set(&sc->sc_media, sc->sc_defaultmedia);
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} else {
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ifmedia_add(&sc->sc_media,
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IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0), 0, NULL);
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ifmedia_set(&sc->sc_media,
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IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0));
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}
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switch (sc->sc_memsize) {
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case 8192:
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sc->sc_nrbuf = 4;
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sc->sc_ntbuf = 1;
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break;
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case 16384:
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sc->sc_nrbuf = 8;
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sc->sc_ntbuf = 2;
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break;
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case 32768:
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sc->sc_nrbuf = 16;
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sc->sc_ntbuf = 4;
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break;
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case 65536:
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sc->sc_nrbuf = 32;
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sc->sc_ntbuf = 8;
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break;
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case 131072:
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sc->sc_nrbuf = 64;
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sc->sc_ntbuf = 16;
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break;
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case 262144:
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sc->sc_nrbuf = 128;
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sc->sc_ntbuf = 32;
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break;
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default:
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/* weird memory size; cope with it */
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nbuf = sc->sc_memsize / LEBLEN;
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sc->sc_ntbuf = nbuf / 5;
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sc->sc_nrbuf = nbuf - sc->sc_ntbuf;
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}
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if_printf(ifp, "%d receive buffers, %d transmit buffers\n",
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sc->sc_nrbuf, sc->sc_ntbuf);
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/* Make sure the chip is stopped. */
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LE_LOCK(sc);
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lance_stop(sc);
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LE_UNLOCK(sc);
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return (0);
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}
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void
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lance_attach(struct lance_softc *sc)
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{
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if_t ifp = sc->sc_ifp;
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/* Attach the interface. */
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ether_ifattach(ifp, sc->sc_enaddr);
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/* Claim 802.1q capability. */
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if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
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if_setcapabilitiesbit(ifp, IFCAP_VLAN_MTU, 0);
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if_setcapenablebit(ifp, IFCAP_VLAN_MTU, 0);
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gone_in(15, "le: 10/100 NIC no longer needed for Qemu/MIPS");
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}
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void
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lance_detach(struct lance_softc *sc)
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{
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if_t ifp = sc->sc_ifp;
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LE_LOCK(sc);
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lance_stop(sc);
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LE_UNLOCK(sc);
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callout_drain(&sc->sc_wdog_ch);
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ether_ifdetach(ifp);
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if_free(ifp);
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}
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void
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lance_suspend(struct lance_softc *sc)
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{
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LE_LOCK(sc);
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lance_stop(sc);
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LE_UNLOCK(sc);
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}
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void
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lance_resume(struct lance_softc *sc)
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{
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LE_LOCK(sc);
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if (if_getflags(sc->sc_ifp) & IFF_UP)
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lance_init_locked(sc);
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LE_UNLOCK(sc);
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}
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static void
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lance_start(if_t ifp)
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{
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struct lance_softc *sc = if_getsoftc(ifp);
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LE_LOCK(sc);
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(*sc->sc_start_locked)(sc);
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LE_UNLOCK(sc);
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}
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static void
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lance_stop(struct lance_softc *sc)
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{
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if_t ifp = sc->sc_ifp;
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LE_LOCK_ASSERT(sc, MA_OWNED);
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/*
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* Mark the interface down and cancel the watchdog timer.
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*/
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if_setdrvflagbits(ifp, 0, (IFF_DRV_RUNNING | IFF_DRV_OACTIVE));
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callout_stop(&sc->sc_wdog_ch);
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sc->sc_wdog_timer = 0;
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(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
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}
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static void
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lance_init(void *xsc)
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{
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struct lance_softc *sc = (struct lance_softc *)xsc;
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LE_LOCK(sc);
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lance_init_locked(sc);
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LE_UNLOCK(sc);
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}
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/*
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* Initialization of interface; set up initialization block
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* and transmit/receive descriptor rings.
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*/
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void
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lance_init_locked(struct lance_softc *sc)
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{
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if_t ifp = sc->sc_ifp;
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u_long a;
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int timo;
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LE_LOCK_ASSERT(sc, MA_OWNED);
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(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
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DELAY(100);
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/* Newer LANCE chips have a reset register. */
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if (sc->sc_hwreset)
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(*sc->sc_hwreset)(sc);
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/* Set the correct byte swapping mode, etc. */
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(*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3);
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/* Set the current media. This may require the chip to be stopped. */
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if (sc->sc_mediachange)
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(void)(*sc->sc_mediachange)(sc);
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/*
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* Update our private copy of the Ethernet address.
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* We NEED the copy so we can ensure its alignment!
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*/
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memcpy(sc->sc_enaddr, if_getlladdr(ifp), ETHER_ADDR_LEN);
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/* Set up LANCE init block. */
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(*sc->sc_meminit)(sc);
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/* Give LANCE the physical address of its init block. */
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a = sc->sc_addr + LE_INITADDR(sc);
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(*sc->sc_wrcsr)(sc, LE_CSR1, a & 0xffff);
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(*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16);
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/* Try to initialize the LANCE. */
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DELAY(100);
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(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT);
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/* Wait for initialization to finish. */
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for (timo = 100000; timo; timo--)
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if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON)
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break;
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if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) {
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/* Start the LANCE. */
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(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT);
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if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0);
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if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
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sc->sc_wdog_timer = 0;
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callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc);
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(*sc->sc_start_locked)(sc);
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} else
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if_printf(ifp, "controller failed to initialize\n");
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if (sc->sc_hwinit)
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(*sc->sc_hwinit)(sc);
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}
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/*
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* Routine to copy from mbuf chain to transmit buffer in
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* network buffer memory.
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*/
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int
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lance_put(struct lance_softc *sc, int boff, struct mbuf *m)
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{
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struct mbuf *n;
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int len, tlen = 0;
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LE_LOCK_ASSERT(sc, MA_OWNED);
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for (; m; m = n) {
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len = m->m_len;
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if (len == 0) {
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n = m_free(m);
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m = NULL;
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continue;
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}
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(*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len);
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boff += len;
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tlen += len;
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n = m_free(m);
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m = NULL;
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}
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if (tlen < LEMINSIZE) {
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(*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen);
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tlen = LEMINSIZE;
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}
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return (tlen);
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}
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/*
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* Pull data off an interface.
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* Len is length of data, with local net header stripped.
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* We copy the data into mbufs. When full cluster sized units are present
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* we copy into clusters.
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*/
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struct mbuf *
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lance_get(struct lance_softc *sc, int boff, int totlen)
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{
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if_t ifp = sc->sc_ifp;
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struct mbuf *m, *m0, *newm;
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caddr_t newdata;
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int len;
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if (totlen <= ETHER_HDR_LEN || totlen > LEBLEN - ETHER_CRC_LEN) {
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#ifdef LEDEBUG
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if_printf(ifp, "invalid packet size %d; dropping\n", totlen);
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#endif
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return (NULL);
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}
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MGETHDR(m0, M_NOWAIT, MT_DATA);
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if (m0 == NULL)
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return (NULL);
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m0->m_pkthdr.rcvif = ifp;
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m0->m_pkthdr.len = totlen;
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len = MHLEN;
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m = m0;
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while (totlen > 0) {
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if (totlen >= MINCLSIZE) {
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if (!(MCLGET(m, M_NOWAIT)))
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goto bad;
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len = MCLBYTES;
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}
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if (m == m0) {
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newdata = (caddr_t)
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ALIGN(m->m_data + ETHER_HDR_LEN) - ETHER_HDR_LEN;
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len -= newdata - m->m_data;
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m->m_data = newdata;
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}
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m->m_len = len = min(totlen, len);
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(*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len);
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boff += len;
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totlen -= len;
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if (totlen > 0) {
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MGET(newm, M_NOWAIT, MT_DATA);
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if (newm == NULL)
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goto bad;
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len = MLEN;
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m = m->m_next = newm;
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}
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}
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return (m0);
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bad:
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m_freem(m0);
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return (NULL);
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}
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static void
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lance_watchdog(void *xsc)
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{
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struct lance_softc *sc = (struct lance_softc *)xsc;
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if_t ifp = sc->sc_ifp;
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LE_LOCK_ASSERT(sc, MA_OWNED);
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if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) {
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callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc);
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return;
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}
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if_printf(ifp, "device timeout\n");
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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lance_init_locked(sc);
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}
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static int
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lance_mediachange(if_t ifp)
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{
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struct lance_softc *sc = if_getsoftc(ifp);
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if (sc->sc_mediachange) {
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/*
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* For setting the port in LE_CSR15 the PCnet chips must
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* be powered down or stopped and unlike documented may
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* not take effect without an initialization. So don't
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* invoke (*sc_mediachange) directly here but go through
|
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* lance_init_locked().
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*/
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LE_LOCK(sc);
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lance_stop(sc);
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lance_init_locked(sc);
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if (!if_sendq_empty(ifp))
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(*sc->sc_start_locked)(sc);
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LE_UNLOCK(sc);
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}
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return (0);
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}
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|
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static void
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lance_mediastatus(if_t ifp, struct ifmediareq *ifmr)
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{
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struct lance_softc *sc = if_getsoftc(ifp);
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LE_LOCK(sc);
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if (!(if_getflags(ifp) & IFF_UP)) {
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LE_UNLOCK(sc);
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return;
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}
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|
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ifmr->ifm_status = IFM_AVALID;
|
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if (sc->sc_flags & LE_CARRIER)
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ifmr->ifm_status |= IFM_ACTIVE;
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|
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if (sc->sc_mediastatus)
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(*sc->sc_mediastatus)(sc, ifmr);
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LE_UNLOCK(sc);
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}
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|
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/*
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* Process an ioctl request.
|
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*/
|
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static int
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lance_ioctl(if_t ifp, u_long cmd, caddr_t data)
|
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{
|
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struct lance_softc *sc = if_getsoftc(ifp);
|
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struct ifreq *ifr = (struct ifreq *)data;
|
|
int error = 0;
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|
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switch (cmd) {
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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 */
|