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/* $NetBSD: lance.c,v 1.34 2005/12/24 20:27:30 perry Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
* Simulation Facility, NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell and Rick Macklem.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if_le.c 8.2 (Berkeley) 11/16/93
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/le/lance.c 207554 2010-05-03 07:32:50Z sobomax $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/lock.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <machine/bus.h>
#include <dev/le/lancereg.h>
#include <dev/le/lancevar.h>
devclass_t le_devclass;
static void lance_start(struct ifnet *);
static void lance_stop(struct lance_softc *);
static void lance_init(void *);
static void lance_watchdog(void *s);
static int lance_mediachange(struct ifnet *);
static void lance_mediastatus(struct ifnet *, struct ifmediareq *);
static int lance_ioctl(struct ifnet *, u_long, caddr_t);
int
lance_config(struct lance_softc *sc, const char* name, int unit)
{
struct ifnet *ifp;
int i, nbuf;
if (LE_LOCK_INITIALIZED(sc) == 0)
return (ENXIO);
ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL)
return (ENOSPC);
callout_init_mtx(&sc->sc_wdog_ch, &sc->sc_mtx, 0);
/* Initialize ifnet structure. */
ifp->if_softc = sc;
if_initname(ifp, name, unit);
ifp->if_start = lance_start;
ifp->if_ioctl = lance_ioctl;
ifp->if_init = lance_init;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
#ifdef LANCE_REVC_BUG
ifp->if_flags &= ~IFF_MULTICAST;
#endif
ifp->if_baudrate = IF_Mbps(10);
IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
IFQ_SET_READY(&ifp->if_snd);
/* 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)
{
struct ifnet *ifp = sc->sc_ifp;
/* Attach the interface. */
ether_ifattach(ifp, sc->sc_enaddr);
/* Claim 802.1q capability. */
ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
ifp->if_capabilities |= IFCAP_VLAN_MTU;
ifp->if_capenable |= IFCAP_VLAN_MTU;
}
void
lance_detach(struct lance_softc *sc)
{
struct ifnet *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 (sc->sc_ifp->if_flags & IFF_UP)
lance_init_locked(sc);
LE_UNLOCK(sc);
}
static void
lance_start(struct ifnet *ifp)
{
struct lance_softc *sc = ifp->if_softc;
LE_LOCK(sc);
(*sc->sc_start_locked)(sc);
LE_UNLOCK(sc);
}
static void
lance_stop(struct lance_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
LE_LOCK_ASSERT(sc, MA_OWNED);
/*
* Mark the interface down and cancel the watchdog timer.
*/
ifp->if_drv_flags &= ~(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)
{
struct ifnet *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_LLADDR(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);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~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)
{
struct ifnet *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_DONTWAIT, 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) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0)
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_DONTWAIT, MT_DATA);
if (newm == 0)
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;
struct ifnet *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");
++ifp->if_oerrors;
lance_init_locked(sc);
}
static int
lance_mediachange(struct ifnet *ifp)
{
struct lance_softc *sc = ifp->if_softc;
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 (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
(*sc->sc_start_locked)(sc);
LE_UNLOCK(sc);
}
return (0);
}
static void
lance_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct lance_softc *sc = ifp->if_softc;
LE_LOCK(sc);
if (!(ifp->if_flags & 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(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct lance_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
int error = 0;
switch (cmd) {
case SIOCSIFFLAGS:
LE_LOCK(sc);
if (ifp->if_flags & 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 ((ifp->if_flags & IFF_ALLMULTI) &&
!(sc->sc_flags & LE_ALLMULTI)) {
sc->sc_flags |= LE_ALLMULTI;
lance_init_locked(sc);
} else if (!(ifp->if_flags & IFF_ALLMULTI) &&
(sc->sc_flags & LE_ALLMULTI)) {
sc->sc_flags &= ~LE_ALLMULTI;
lance_init_locked(sc);
}
if (!(ifp->if_flags & IFF_UP) &&
ifp->if_drv_flags & IFF_DRV_RUNNING) {
/*
* If interface is marked down and it is running, then
* stop it.
*/
lance_stop(sc);
} else if (ifp->if_flags & IFF_UP &&
!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
lance_init_locked(sc);
}
#ifdef LEDEBUG
if (ifp->if_flags & 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 (ifp->if_drv_flags & 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);
}
/*
* Set up the logical address filter.
*/
void
lance_setladrf(struct lance_softc *sc, uint16_t *af)
{
struct ifnet *ifp = sc->sc_ifp;
struct ifmultiaddr *ifma;
uint32_t crc;
/*
* Set up multicast address filter by passing all multicast addresses
* through a crc generator, and then using the high order 6 bits as an
* index into the 64 bit logical address filter. The high order bit
* selects the word, while the rest of the bits select the bit within
* the word.
*/
if (ifp->if_flags & IFF_PROMISC || 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_maddr_rlock(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
crc = ether_crc32_le(LLADDR((struct sockaddr_dl *)
ifma->ifma_addr), ETHER_ADDR_LEN);
/* Just want the 6 most significant bits. */
crc >>= 26;
/* Set the corresponding bit in the filter. */
af[crc >> 4] |= LE_HTOLE16(1 << (crc & 0xf));
}
if_maddr_runlock(ifp);
}
/*
* 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 */