13f4c340ae
IFF_DRV_RUNNING, as well as the move from ifnet.if_flags to ifnet.if_drv_flags. Device drivers are now responsible for synchronizing access to these flags, as they are in if_drv_flags. This helps prevent races between the network stack and device driver in maintaining the interface flags field. Many __FreeBSD__ and __FreeBSD_version checks maintained and continued; some less so. Reviewed by: pjd, bz MFC after: 7 days
1222 lines
28 KiB
C
1222 lines
28 KiB
C
/* $FreeBSD$ */
|
|
/* $NecBSD: dp83932.c,v 1.5 1999/07/29 05:08:44 kmatsuda Exp $ */
|
|
/* $NetBSD: if_snc.c,v 1.18 1998/04/25 21:27:40 scottr Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997, 1998, 1999
|
|
* Kouichi Matsuda. All rights reserved.
|
|
*
|
|
* 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 Kouichi Matsuda for
|
|
* NetBSD/pc98.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*/
|
|
|
|
/*
|
|
* Modified for FreeBSD(98) 4.0 from NetBSD/pc98 1.4.2 by Motomichi Matsuzaki.
|
|
*/
|
|
|
|
/*
|
|
* Modified for NetBSD/pc98 1.2G from NetBSD/mac68k 1.2G by Kouichi Matsuda.
|
|
* Make adapted for NEC PC-9801-83, 84, PC-9801-103, 104, PC-9801N-25 and
|
|
* PC-9801N-J02, J02R, which uses National Semiconductor DP83934AVQB as
|
|
* Ethernet Controller and National Semiconductor NS46C46 as
|
|
* (64 * 16 bits) Microwire Serial EEPROM.
|
|
*/
|
|
|
|
/*-
|
|
* National Semiconductor DP8393X SONIC Driver
|
|
* Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk)
|
|
* You may use, copy, and modify this program so long as you retain the
|
|
* copyright line.
|
|
*
|
|
* This driver has been substantially modified since Algorithmics donated
|
|
* it.
|
|
*
|
|
* Denton Gentry <denny1@home.com>
|
|
* and also
|
|
* Yanagisawa Takeshi <yanagisw@aa.ap.titech.ac.jp>
|
|
* did the work to get this running on the Macintosh.
|
|
*/
|
|
|
|
#include "opt_inet.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/errno.h>
|
|
#if NRND > 0
|
|
#include <sys/rnd.h>
|
|
#endif
|
|
|
|
#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/bpf.h>
|
|
|
|
#include <sys/bus.h>
|
|
#include <machine/bus.h>
|
|
#include <dev/snc/dp83932reg.h>
|
|
#include <dev/snc/dp83932var.h>
|
|
|
|
hide void sncwatchdog(struct ifnet *);
|
|
hide void sncinit(void *);
|
|
hide int sncstop(struct snc_softc *sc);
|
|
hide int sncioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
|
|
hide void sncstart(struct ifnet *ifp);
|
|
hide void sncreset(struct snc_softc *sc);
|
|
|
|
hide void caminitialise(struct snc_softc *);
|
|
hide void camentry(struct snc_softc *, int, u_char *ea);
|
|
hide void camprogram(struct snc_softc *);
|
|
hide void initialise_tda(struct snc_softc *);
|
|
hide void initialise_rda(struct snc_softc *);
|
|
hide void initialise_rra(struct snc_softc *);
|
|
#ifdef SNCDEBUG
|
|
hide void camdump(struct snc_softc *sc);
|
|
#endif
|
|
|
|
hide void sonictxint(struct snc_softc *);
|
|
hide void sonicrxint(struct snc_softc *);
|
|
|
|
hide u_int sonicput(struct snc_softc *sc, struct mbuf *m0, int mtd_next);
|
|
hide int sonic_read(struct snc_softc *, u_int32_t, int);
|
|
hide struct mbuf *sonic_get(struct snc_softc *, u_int32_t, int);
|
|
|
|
int snc_enable(struct snc_softc *);
|
|
void snc_disable(struct snc_softc *);
|
|
|
|
int snc_mediachange(struct ifnet *);
|
|
void snc_mediastatus(struct ifnet *, struct ifmediareq *);
|
|
|
|
#ifdef NetBSD
|
|
#if NetBSD <= 199714
|
|
struct cfdriver snc_cd = {
|
|
NULL, "snc", DV_IFNET
|
|
};
|
|
#endif
|
|
#endif
|
|
|
|
#undef assert
|
|
#undef _assert
|
|
|
|
#ifdef NDEBUG
|
|
#define assert(e) ((void)0)
|
|
#define _assert(e) ((void)0)
|
|
#else
|
|
#define _assert(e) assert(e)
|
|
#ifdef __STDC__
|
|
#define assert(e) ((e) ? (void)0 : __assert("snc ", __FILE__, __LINE__, #e))
|
|
#else /* PCC */
|
|
#define assert(e) ((e) ? (void)0 : __assert("snc "__FILE__, __LINE__, "e"))
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef SNCDEBUG
|
|
#define SNC_SHOWTXHDR 0x01 /* show tx ether_header */
|
|
#define SNC_SHOWRXHDR 0x02 /* show rx ether_header */
|
|
#define SNC_SHOWCAMENT 0x04 /* show CAM entry */
|
|
#endif /* SNCDEBUG */
|
|
int sncdebug = 0;
|
|
|
|
|
|
void
|
|
sncconfig(sc, media, nmedia, defmedia, myea)
|
|
struct snc_softc *sc;
|
|
int *media, nmedia, defmedia;
|
|
u_int8_t *myea;
|
|
{
|
|
struct ifnet *ifp;
|
|
int i;
|
|
|
|
#ifdef SNCDEBUG
|
|
if ((sncdebug & SNC_SHOWCAMENT) != 0) {
|
|
camdump(sc);
|
|
}
|
|
#endif
|
|
|
|
ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
|
|
if (ifp == NULL)
|
|
panic("%s: can not if_alloc()\n",
|
|
device_get_nameunit(sc->sc_dev));
|
|
|
|
#ifdef SNCDEBUG
|
|
device_printf(sc->sc_dev,
|
|
"buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x\n",
|
|
sc->v_rra[0], sc->v_cda,
|
|
sc->v_rda, sc->mtda[0].mtd_vtxp);
|
|
#endif
|
|
|
|
ifp->if_softc = sc;
|
|
if_initname(ifp, device_get_name(sc->sc_dev),
|
|
device_get_unit(sc->sc_dev));
|
|
ifp->if_ioctl = sncioctl;
|
|
ifp->if_start = sncstart;
|
|
ifp->if_flags =
|
|
IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST | IFF_NEEDSGIANT;
|
|
ifp->if_watchdog = sncwatchdog;
|
|
ifp->if_init = sncinit;
|
|
ifp->if_mtu = ETHERMTU;
|
|
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
|
|
|
|
/* Initialize media goo. */
|
|
ifmedia_init(&sc->sc_media, 0, snc_mediachange,
|
|
snc_mediastatus);
|
|
if (media != NULL) {
|
|
for (i = 0; i < nmedia; i++)
|
|
ifmedia_add(&sc->sc_media, media[i], 0, NULL);
|
|
ifmedia_set(&sc->sc_media, defmedia);
|
|
} else {
|
|
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL);
|
|
ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL);
|
|
}
|
|
|
|
ether_ifattach(ifp, myea);
|
|
|
|
#if NRND > 0
|
|
rnd_attach_source(&sc->rnd_source, device_get_nameunit(sc->sc_dev),
|
|
RND_TYPE_NET, 0);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sncshutdown(arg)
|
|
void *arg;
|
|
{
|
|
|
|
sncstop((struct snc_softc *)arg);
|
|
}
|
|
|
|
/*
|
|
* Media change callback.
|
|
*/
|
|
int
|
|
snc_mediachange(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct snc_softc *sc = ifp->if_softc;
|
|
|
|
if (sc->sc_mediachange)
|
|
return ((*sc->sc_mediachange)(sc));
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Media status callback.
|
|
*/
|
|
void
|
|
snc_mediastatus(ifp, ifmr)
|
|
struct ifnet *ifp;
|
|
struct ifmediareq *ifmr;
|
|
{
|
|
struct snc_softc *sc = ifp->if_softc;
|
|
|
|
if (sc->sc_enabled == 0) {
|
|
ifmr->ifm_active = IFM_ETHER | IFM_NONE;
|
|
ifmr->ifm_status = 0;
|
|
return;
|
|
}
|
|
|
|
if (sc->sc_mediastatus)
|
|
(*sc->sc_mediastatus)(sc, ifmr);
|
|
}
|
|
|
|
|
|
hide int
|
|
sncioctl(ifp, cmd, data)
|
|
struct ifnet *ifp;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
{
|
|
struct ifreq *ifr;
|
|
struct snc_softc *sc = ifp->if_softc;
|
|
int s = splhardnet(), err = 0;
|
|
int temp;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFFLAGS:
|
|
if ((ifp->if_flags & IFF_UP) == 0 &&
|
|
(ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
|
|
/*
|
|
* If interface is marked down and it is running,
|
|
* then stop it.
|
|
*/
|
|
sncstop(sc);
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
snc_disable(sc);
|
|
} else if ((ifp->if_flags & IFF_UP) != 0 &&
|
|
(ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
|
|
/*
|
|
* If interface is marked up and it is stopped,
|
|
* then start it.
|
|
*/
|
|
if ((err = snc_enable(sc)) != 0)
|
|
break;
|
|
sncinit(sc);
|
|
} else if (sc->sc_enabled) {
|
|
/*
|
|
* reset the interface to pick up any other changes
|
|
* in flags
|
|
*/
|
|
temp = ifp->if_flags & IFF_UP;
|
|
sncreset(sc);
|
|
ifp->if_flags |= temp;
|
|
sncstart(ifp);
|
|
}
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if (sc->sc_enabled == 0) {
|
|
err = EIO;
|
|
break;
|
|
}
|
|
temp = ifp->if_flags & IFF_UP;
|
|
sncreset(sc);
|
|
ifp->if_flags |= temp;
|
|
err = 0;
|
|
break;
|
|
case SIOCGIFMEDIA:
|
|
case SIOCSIFMEDIA:
|
|
ifr = (struct ifreq *) data;
|
|
err = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
|
|
break;
|
|
default:
|
|
err = ether_ioctl(ifp, cmd, data);
|
|
break;
|
|
}
|
|
splx(s);
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* Encapsulate a packet of type family for the local net.
|
|
*/
|
|
hide void
|
|
sncstart(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct snc_softc *sc = ifp->if_softc;
|
|
struct mbuf *m;
|
|
int mtd_next;
|
|
|
|
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
|
|
IFF_DRV_RUNNING)
|
|
return;
|
|
|
|
outloop:
|
|
/* Check for room in the xmit buffer. */
|
|
if ((mtd_next = (sc->mtd_free + 1)) == NTDA)
|
|
mtd_next = 0;
|
|
|
|
if (mtd_next == sc->mtd_hw) {
|
|
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
|
|
return;
|
|
}
|
|
|
|
IF_DEQUEUE(&ifp->if_snd, m);
|
|
if (m == 0)
|
|
return;
|
|
|
|
/* We need the header for m_pkthdr.len. */
|
|
M_ASSERTPKTHDR(m);
|
|
|
|
/*
|
|
* If there is nothing in the o/p queue, and there is room in
|
|
* the Tx ring, then send the packet directly. Otherwise append
|
|
* it to the o/p queue.
|
|
*/
|
|
if ((sonicput(sc, m, mtd_next)) == 0) {
|
|
IF_PREPEND(&ifp->if_snd, m);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If bpf is listening on this interface, let it see the packet
|
|
* before we commit it to the wire, but only if we are really
|
|
* committed to send it.
|
|
*
|
|
* XXX: Locking must protect m against premature m_freem() in
|
|
* sonictxint().
|
|
*/
|
|
BPF_MTAP(ifp, m);
|
|
|
|
sc->mtd_prev = sc->mtd_free;
|
|
sc->mtd_free = mtd_next;
|
|
|
|
ifp->if_opackets++; /* # of pkts */
|
|
|
|
/* Jump back for possibly more punishment. */
|
|
goto outloop;
|
|
}
|
|
|
|
/*
|
|
* reset and restart the SONIC. Called in case of fatal
|
|
* hardware/software errors.
|
|
*/
|
|
hide void
|
|
sncreset(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
sncstop(sc);
|
|
sncinit(sc);
|
|
}
|
|
|
|
hide void
|
|
sncinit(xsc)
|
|
void *xsc;
|
|
{
|
|
struct snc_softc *sc = xsc;
|
|
u_long s_rcr;
|
|
int s;
|
|
|
|
if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
|
|
/* already running */
|
|
return;
|
|
|
|
s = splhardnet();
|
|
|
|
NIC_PUT(sc, SNCR_CR, CR_RST); /* DCR only accessable in reset mode! */
|
|
|
|
/* config it */
|
|
NIC_PUT(sc, SNCR_DCR, (sc->sncr_dcr |
|
|
(sc->bitmode ? DCR_DW32 : DCR_DW16)));
|
|
NIC_PUT(sc, SNCR_DCR2, sc->sncr_dcr2);
|
|
|
|
s_rcr = RCR_BRD | RCR_LBNONE;
|
|
if (sc->sc_ifp->if_flags & IFF_PROMISC)
|
|
s_rcr |= RCR_PRO;
|
|
if (sc->sc_ifp->if_flags & IFF_ALLMULTI)
|
|
s_rcr |= RCR_AMC;
|
|
NIC_PUT(sc, SNCR_RCR, s_rcr);
|
|
|
|
NIC_PUT(sc, SNCR_IMR, (IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_LCDEN));
|
|
|
|
/* clear pending interrupts */
|
|
NIC_PUT(sc, SNCR_ISR, ISR_ALL);
|
|
|
|
/* clear tally counters */
|
|
NIC_PUT(sc, SNCR_CRCT, -1);
|
|
NIC_PUT(sc, SNCR_FAET, -1);
|
|
NIC_PUT(sc, SNCR_MPT, -1);
|
|
|
|
initialise_tda(sc);
|
|
initialise_rda(sc);
|
|
initialise_rra(sc);
|
|
|
|
/* enable the chip */
|
|
NIC_PUT(sc, SNCR_CR, 0);
|
|
wbflush();
|
|
|
|
/* program the CAM */
|
|
camprogram(sc);
|
|
|
|
/* get it to read resource descriptors */
|
|
NIC_PUT(sc, SNCR_CR, CR_RRRA);
|
|
wbflush();
|
|
while ((NIC_GET(sc, SNCR_CR)) & CR_RRRA)
|
|
continue;
|
|
|
|
/* enable rx */
|
|
NIC_PUT(sc, SNCR_CR, CR_RXEN);
|
|
wbflush();
|
|
|
|
/* flag interface as "running" */
|
|
sc->sc_ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
sc->sc_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
|
|
|
|
splx(s);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* close down an interface and free its buffers
|
|
* Called on final close of device, or if sncinit() fails
|
|
* part way through.
|
|
*/
|
|
hide int
|
|
sncstop(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
struct mtd *mtd;
|
|
int s = splhardnet();
|
|
|
|
/* stick chip in reset */
|
|
NIC_PUT(sc, SNCR_CR, CR_RST);
|
|
wbflush();
|
|
|
|
/* free all receive buffers (currently static so nothing to do) */
|
|
|
|
/* free all pending transmit mbufs */
|
|
while (sc->mtd_hw != sc->mtd_free) {
|
|
mtd = &sc->mtda[sc->mtd_hw];
|
|
if (mtd->mtd_mbuf)
|
|
m_freem(mtd->mtd_mbuf);
|
|
if (++sc->mtd_hw == NTDA) sc->mtd_hw = 0;
|
|
}
|
|
|
|
sc->sc_ifp->if_timer = 0;
|
|
sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
sc->sc_ifp->if_flags &= ~IFF_UP;
|
|
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Called if any Tx packets remain unsent after 5 seconds,
|
|
* In all cases we just reset the chip, and any retransmission
|
|
* will be handled by higher level protocol timeouts.
|
|
*/
|
|
hide void
|
|
sncwatchdog(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct snc_softc *sc = ifp->if_softc;
|
|
struct mtd *mtd;
|
|
int temp;
|
|
|
|
if (sc->mtd_hw != sc->mtd_free) {
|
|
/* something still pending for transmit */
|
|
mtd = &sc->mtda[sc->mtd_hw];
|
|
if (SRO(sc, mtd->mtd_vtxp, TXP_STATUS) == 0)
|
|
log(LOG_ERR, "%s: Tx - timeout\n",
|
|
device_get_nameunit(sc->sc_dev));
|
|
else
|
|
log(LOG_ERR, "%s: Tx - lost interrupt\n",
|
|
device_get_nameunit(sc->sc_dev));
|
|
temp = ifp->if_flags & IFF_UP;
|
|
sncreset(sc);
|
|
ifp->if_flags |= temp;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* stuff packet into sonic (at splnet)
|
|
*/
|
|
hide u_int
|
|
sonicput(sc, m0, mtd_next)
|
|
struct snc_softc *sc;
|
|
struct mbuf *m0;
|
|
int mtd_next;
|
|
{
|
|
struct mtd *mtdp;
|
|
struct mbuf *m;
|
|
u_int32_t buff;
|
|
u_int32_t txp;
|
|
u_int len = 0;
|
|
u_int totlen = 0;
|
|
|
|
#ifdef whyonearthwouldyoudothis
|
|
if (NIC_GET(sc, SNCR_CR) & CR_TXP)
|
|
return (0);
|
|
#endif
|
|
|
|
/* grab the replacement mtd */
|
|
mtdp = &sc->mtda[sc->mtd_free];
|
|
|
|
buff = mtdp->mtd_vbuf;
|
|
|
|
/* this packet goes to mtdnext fill in the TDA */
|
|
mtdp->mtd_mbuf = m0;
|
|
txp = mtdp->mtd_vtxp;
|
|
|
|
/* Write to the config word. Every (NTDA/2)+1 packets we set an intr */
|
|
if (sc->mtd_pint == 0) {
|
|
sc->mtd_pint = NTDA/2;
|
|
SWO(sc, txp, TXP_CONFIG, TCR_PINT);
|
|
} else {
|
|
sc->mtd_pint--;
|
|
SWO(sc, txp, TXP_CONFIG, 0);
|
|
}
|
|
|
|
for (m = m0; m; m = m->m_next) {
|
|
len = m->m_len;
|
|
totlen += len;
|
|
(*sc->sc_copytobuf)(sc, mtod(m, caddr_t), buff, len);
|
|
buff += len;
|
|
}
|
|
if (totlen >= TXBSIZE) {
|
|
panic("%s: sonicput: packet overflow",
|
|
device_get_nameunit(sc->sc_dev));
|
|
}
|
|
|
|
SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRLO,
|
|
LOWER(mtdp->mtd_vbuf));
|
|
SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRHI,
|
|
UPPER(mtdp->mtd_vbuf));
|
|
|
|
if (totlen < ETHERMIN + sizeof(struct ether_header)) {
|
|
int pad = ETHERMIN + sizeof(struct ether_header) - totlen;
|
|
(*sc->sc_zerobuf)(sc, mtdp->mtd_vbuf + totlen, pad);
|
|
totlen = ETHERMIN + sizeof(struct ether_header);
|
|
}
|
|
|
|
SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FSIZE,
|
|
totlen);
|
|
SWO(sc, txp, TXP_FRAGCNT, 1);
|
|
SWO(sc, txp, TXP_PKTSIZE, totlen);
|
|
|
|
/* link onto the next mtd that will be used */
|
|
SWO(sc, txp, TXP_FRAGOFF + (1 * TXP_FRAGSIZE) + TXP_FPTRLO,
|
|
LOWER(sc->mtda[mtd_next].mtd_vtxp) | EOL);
|
|
|
|
/*
|
|
* The previous txp.tlink currently contains a pointer to
|
|
* our txp | EOL. Want to clear the EOL, so write our
|
|
* pointer to the previous txp.
|
|
*/
|
|
SWO(sc, sc->mtda[sc->mtd_prev].mtd_vtxp, sc->mtd_tlinko,
|
|
LOWER(mtdp->mtd_vtxp));
|
|
|
|
/* make sure chip is running */
|
|
wbflush();
|
|
NIC_PUT(sc, SNCR_CR, CR_TXP);
|
|
wbflush();
|
|
sc->sc_ifp->if_timer = 5; /* 5 seconds to watch for failing to transmit */
|
|
|
|
return (totlen);
|
|
}
|
|
|
|
/*
|
|
* These are called from sonicioctl() when /etc/ifconfig is run to set
|
|
* the address or switch the i/f on.
|
|
*/
|
|
/*
|
|
* CAM support
|
|
*/
|
|
hide void
|
|
caminitialise(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
u_int32_t v_cda = sc->v_cda;
|
|
int i;
|
|
int camoffset;
|
|
|
|
for (i = 0; i < MAXCAM; i++) {
|
|
camoffset = i * CDA_CAMDESC;
|
|
SWO(sc, v_cda, (camoffset + CDA_CAMEP), i);
|
|
SWO(sc, v_cda, (camoffset + CDA_CAMAP2), 0);
|
|
SWO(sc, v_cda, (camoffset + CDA_CAMAP1), 0);
|
|
SWO(sc, v_cda, (camoffset + CDA_CAMAP0), 0);
|
|
}
|
|
SWO(sc, v_cda, CDA_ENABLE, 0);
|
|
|
|
#ifdef SNCDEBUG
|
|
if ((sncdebug & SNC_SHOWCAMENT) != 0) {
|
|
camdump(sc);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
hide void
|
|
camentry(sc, entry, ea)
|
|
int entry;
|
|
u_char *ea;
|
|
struct snc_softc *sc;
|
|
{
|
|
u_int32_t v_cda = sc->v_cda;
|
|
int camoffset = entry * CDA_CAMDESC;
|
|
|
|
SWO(sc, v_cda, camoffset + CDA_CAMEP, entry);
|
|
SWO(sc, v_cda, camoffset + CDA_CAMAP2, (ea[5] << 8) | ea[4]);
|
|
SWO(sc, v_cda, camoffset + CDA_CAMAP1, (ea[3] << 8) | ea[2]);
|
|
SWO(sc, v_cda, camoffset + CDA_CAMAP0, (ea[1] << 8) | ea[0]);
|
|
SWO(sc, v_cda, CDA_ENABLE,
|
|
(SRO(sc, v_cda, CDA_ENABLE) | (1 << entry)));
|
|
}
|
|
|
|
hide void
|
|
camprogram(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
struct ifmultiaddr *ifma;
|
|
struct ifnet *ifp;
|
|
int timeout;
|
|
int mcount = 0;
|
|
|
|
caminitialise(sc);
|
|
|
|
ifp = sc->sc_ifp;
|
|
|
|
/* Always load our own address first. */
|
|
camentry (sc, mcount, IFP2ENADDR(sc->sc_ifp));
|
|
mcount++;
|
|
|
|
/* Assume we won't need allmulti bit. */
|
|
ifp->if_flags &= ~IFF_ALLMULTI;
|
|
|
|
/* Loop through multicast addresses */
|
|
IF_ADDR_LOCK(ifp);
|
|
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
|
|
if (ifma->ifma_addr->sa_family != AF_LINK)
|
|
continue;
|
|
if (mcount == MAXCAM) {
|
|
ifp->if_flags |= IFF_ALLMULTI;
|
|
break;
|
|
}
|
|
|
|
/* program the CAM with the specified entry */
|
|
camentry(sc, mcount,
|
|
LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
|
|
mcount++;
|
|
}
|
|
IF_ADDR_UNLOCK(ifp);
|
|
|
|
NIC_PUT(sc, SNCR_CDP, LOWER(sc->v_cda));
|
|
NIC_PUT(sc, SNCR_CDC, MAXCAM);
|
|
NIC_PUT(sc, SNCR_CR, CR_LCAM);
|
|
wbflush();
|
|
|
|
timeout = 10000;
|
|
while ((NIC_GET(sc, SNCR_CR) & CR_LCAM) && timeout--)
|
|
continue;
|
|
if (timeout == 0) {
|
|
/* XXX */
|
|
panic("%s: CAM initialisation failed\n",
|
|
device_get_nameunit(sc->sc_dev));
|
|
}
|
|
timeout = 10000;
|
|
while (((NIC_GET(sc, SNCR_ISR) & ISR_LCD) == 0) && timeout--)
|
|
continue;
|
|
|
|
if (NIC_GET(sc, SNCR_ISR) & ISR_LCD)
|
|
NIC_PUT(sc, SNCR_ISR, ISR_LCD);
|
|
else
|
|
device_printf(sc->sc_dev,
|
|
"CAM initialisation without interrupt\n");
|
|
}
|
|
|
|
#ifdef SNCDEBUG
|
|
hide void
|
|
camdump(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
int i;
|
|
|
|
printf("CAM entries:\n");
|
|
NIC_PUT(sc, SNCR_CR, CR_RST);
|
|
wbflush();
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
u_short ap2, ap1, ap0;
|
|
NIC_PUT(sc, SNCR_CEP, i);
|
|
wbflush();
|
|
ap2 = NIC_GET(sc, SNCR_CAP2);
|
|
ap1 = NIC_GET(sc, SNCR_CAP1);
|
|
ap0 = NIC_GET(sc, SNCR_CAP0);
|
|
printf("%d: ap2=0x%x ap1=0x%x ap0=0x%x\n", i, ap2, ap1, ap0);
|
|
}
|
|
printf("CAM enable 0x%x\n", NIC_GET(sc, SNCR_CEP));
|
|
|
|
NIC_PUT(sc, SNCR_CR, 0);
|
|
wbflush();
|
|
}
|
|
#endif
|
|
|
|
hide void
|
|
initialise_tda(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
struct mtd *mtd;
|
|
int i;
|
|
|
|
for (i = 0; i < NTDA; i++) {
|
|
mtd = &sc->mtda[i];
|
|
mtd->mtd_mbuf = 0;
|
|
}
|
|
|
|
sc->mtd_hw = 0;
|
|
sc->mtd_prev = NTDA - 1;
|
|
sc->mtd_free = 0;
|
|
sc->mtd_tlinko = TXP_FRAGOFF + 1*TXP_FRAGSIZE + TXP_FPTRLO;
|
|
sc->mtd_pint = NTDA/2;
|
|
|
|
NIC_PUT(sc, SNCR_UTDA, UPPER(sc->mtda[0].mtd_vtxp));
|
|
NIC_PUT(sc, SNCR_CTDA, LOWER(sc->mtda[0].mtd_vtxp));
|
|
}
|
|
|
|
hide void
|
|
initialise_rda(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
int i;
|
|
u_int32_t vv_rda = 0;
|
|
u_int32_t v_rda = 0;
|
|
|
|
/* link the RDA's together into a circular list */
|
|
for (i = 0; i < (sc->sc_nrda - 1); i++) {
|
|
v_rda = sc->v_rda + (i * RXPKT_SIZE(sc));
|
|
vv_rda = sc->v_rda + ((i+1) * RXPKT_SIZE(sc));
|
|
SWO(sc, v_rda, RXPKT_RLINK, LOWER(vv_rda));
|
|
SWO(sc, v_rda, RXPKT_INUSE, 1);
|
|
}
|
|
v_rda = sc->v_rda + ((sc->sc_nrda - 1) * RXPKT_SIZE(sc));
|
|
SWO(sc, v_rda, RXPKT_RLINK, LOWER(sc->v_rda) | EOL);
|
|
SWO(sc, v_rda, RXPKT_INUSE, 1);
|
|
|
|
/* mark end of receive descriptor list */
|
|
sc->sc_rdamark = sc->sc_nrda - 1;
|
|
|
|
sc->sc_rxmark = 0;
|
|
|
|
NIC_PUT(sc, SNCR_URDA, UPPER(sc->v_rda));
|
|
NIC_PUT(sc, SNCR_CRDA, LOWER(sc->v_rda));
|
|
wbflush();
|
|
}
|
|
|
|
hide void
|
|
initialise_rra(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
int i;
|
|
u_int v;
|
|
int bitmode = sc->bitmode;
|
|
|
|
if (bitmode)
|
|
NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 2);
|
|
else
|
|
NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 1);
|
|
|
|
NIC_PUT(sc, SNCR_URRA, UPPER(sc->v_rra[0]));
|
|
NIC_PUT(sc, SNCR_RSA, LOWER(sc->v_rra[0]));
|
|
/* rea must point just past the end of the rra space */
|
|
NIC_PUT(sc, SNCR_REA, LOWER(sc->v_rea));
|
|
NIC_PUT(sc, SNCR_RRP, LOWER(sc->v_rra[0]));
|
|
NIC_PUT(sc, SNCR_RSC, 0);
|
|
|
|
/* fill up SOME of the rra with buffers */
|
|
for (i = 0; i < NRBA; i++) {
|
|
v = SONIC_GETDMA(sc->rbuf[i]);
|
|
SWO(sc, sc->v_rra[i], RXRSRC_PTRHI, UPPER(v));
|
|
SWO(sc, sc->v_rra[i], RXRSRC_PTRLO, LOWER(v));
|
|
SWO(sc, sc->v_rra[i], RXRSRC_WCHI, UPPER(NBPG/2));
|
|
SWO(sc, sc->v_rra[i], RXRSRC_WCLO, LOWER(NBPG/2));
|
|
}
|
|
sc->sc_rramark = NRBA;
|
|
NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[sc->sc_rramark]));
|
|
wbflush();
|
|
}
|
|
|
|
void
|
|
sncintr(arg)
|
|
void *arg;
|
|
{
|
|
struct snc_softc *sc = (struct snc_softc *)arg;
|
|
int isr;
|
|
|
|
if (sc->sc_enabled == 0)
|
|
return;
|
|
|
|
while ((isr = (NIC_GET(sc, SNCR_ISR) & ISR_ALL)) != 0) {
|
|
/* scrub the interrupts that we are going to service */
|
|
NIC_PUT(sc, SNCR_ISR, isr);
|
|
wbflush();
|
|
|
|
if (isr & (ISR_BR | ISR_LCD | ISR_TC))
|
|
device_printf(sc->sc_dev,
|
|
"unexpected interrupt status 0x%x\n",
|
|
isr);
|
|
|
|
if (isr & (ISR_TXDN | ISR_TXER | ISR_PINT))
|
|
sonictxint(sc);
|
|
|
|
if (isr & ISR_PKTRX)
|
|
sonicrxint(sc);
|
|
|
|
if (isr & (ISR_HBL | ISR_RDE | ISR_RBE | ISR_RBAE | ISR_RFO)) {
|
|
if (isr & ISR_HBL)
|
|
/*
|
|
* The repeater is not providing a heartbeat.
|
|
* In itself this isn't harmful, lots of the
|
|
* cheap repeater hubs don't supply a heartbeat.
|
|
* So ignore the lack of heartbeat. Its only
|
|
* if we can't detect a carrier that we have a
|
|
* problem.
|
|
*/
|
|
;
|
|
if (isr & ISR_RDE)
|
|
device_printf(sc->sc_dev,
|
|
"receive descriptors exhausted\n");
|
|
if (isr & ISR_RBE)
|
|
device_printf(sc->sc_dev,
|
|
"receive buffers exhausted\n");
|
|
if (isr & ISR_RBAE)
|
|
device_printf(sc->sc_dev,
|
|
"receive buffer area exhausted\n");
|
|
if (isr & ISR_RFO)
|
|
device_printf(sc->sc_dev,
|
|
"receive FIFO overrun\n");
|
|
}
|
|
if (isr & (ISR_CRC | ISR_FAE | ISR_MP)) {
|
|
#ifdef notdef
|
|
if (isr & ISR_CRC)
|
|
sc->sc_crctally++;
|
|
if (isr & ISR_FAE)
|
|
sc->sc_faetally++;
|
|
if (isr & ISR_MP)
|
|
sc->sc_mptally++;
|
|
#endif
|
|
}
|
|
sncstart(sc->sc_ifp);
|
|
|
|
#if NRND > 0
|
|
if (isr)
|
|
rnd_add_uint32(&sc->rnd_source, isr);
|
|
#endif
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Transmit interrupt routine
|
|
*/
|
|
hide void
|
|
sonictxint(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
struct mtd *mtd;
|
|
u_int32_t txp;
|
|
unsigned short txp_status;
|
|
int mtd_hw;
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
|
|
mtd_hw = sc->mtd_hw;
|
|
|
|
if (mtd_hw == sc->mtd_free)
|
|
return;
|
|
|
|
while (mtd_hw != sc->mtd_free) {
|
|
mtd = &sc->mtda[mtd_hw];
|
|
|
|
txp = mtd->mtd_vtxp;
|
|
|
|
if (SRO(sc, txp, TXP_STATUS) == 0) {
|
|
break; /* it hasn't really gone yet */
|
|
}
|
|
|
|
#ifdef SNCDEBUG
|
|
if ((sncdebug & SNC_SHOWTXHDR) != 0)
|
|
{
|
|
struct ether_header eh;
|
|
|
|
(*sc->sc_copyfrombuf)(sc, &eh, mtd->mtd_vbuf, sizeof(eh));
|
|
device_printf(sc->sc_dev,
|
|
"xmit status=0x%x len=%d type=0x%x from %6D",
|
|
SRO(sc, txp, TXP_STATUS),
|
|
SRO(sc, txp, TXP_PKTSIZE),
|
|
htons(eh.ether_type),
|
|
eh.ether_shost, ":");
|
|
printf(" (to %6D)\n", eh.ether_dhost, ":");
|
|
}
|
|
#endif /* SNCDEBUG */
|
|
|
|
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
|
|
|
|
if (mtd->mtd_mbuf != 0) {
|
|
m_freem(mtd->mtd_mbuf);
|
|
mtd->mtd_mbuf = 0;
|
|
}
|
|
if (++mtd_hw == NTDA) mtd_hw = 0;
|
|
|
|
txp_status = SRO(sc, txp, TXP_STATUS);
|
|
|
|
ifp->if_collisions += (txp_status & TCR_EXC) ? 16 :
|
|
((txp_status & TCR_NC) >> 12);
|
|
|
|
if ((txp_status & TCR_PTX) == 0) {
|
|
ifp->if_oerrors++;
|
|
device_printf(sc->sc_dev, "Tx packet status=0x%x\n",
|
|
txp_status);
|
|
|
|
/* XXX - DG This looks bogus */
|
|
if (mtd_hw != sc->mtd_free) {
|
|
printf("resubmitting remaining packets\n");
|
|
mtd = &sc->mtda[mtd_hw];
|
|
NIC_PUT(sc, SNCR_CTDA, LOWER(mtd->mtd_vtxp));
|
|
NIC_PUT(sc, SNCR_CR, CR_TXP);
|
|
wbflush();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
sc->mtd_hw = mtd_hw;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Receive interrupt routine
|
|
*/
|
|
hide void
|
|
sonicrxint(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
u_int32_t rda;
|
|
int orra;
|
|
int len;
|
|
int rramark;
|
|
int rdamark;
|
|
u_int16_t rxpkt_ptr;
|
|
|
|
rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
|
|
|
|
while (SRO(sc, rda, RXPKT_INUSE) == 0) {
|
|
u_int status = SRO(sc, rda, RXPKT_STATUS);
|
|
|
|
orra = RBASEQ(SRO(sc, rda, RXPKT_SEQNO)) & RRAMASK;
|
|
rxpkt_ptr = SRO(sc, rda, RXPKT_PTRLO);
|
|
/*
|
|
* Do not trunc ether_header length.
|
|
* Our sonic_read() and sonic_get() require it.
|
|
*/
|
|
len = SRO(sc, rda, RXPKT_BYTEC) - FCSSIZE;
|
|
if (status & RCR_PRX) {
|
|
/* XXX: Does PGOFSET require? */
|
|
u_int32_t pkt =
|
|
sc->rbuf[orra & RBAMASK] + (rxpkt_ptr & PGOFSET);
|
|
if (sonic_read(sc, pkt, len))
|
|
sc->sc_ifp->if_ipackets++;
|
|
else
|
|
sc->sc_ifp->if_ierrors++;
|
|
} else
|
|
sc->sc_ifp->if_ierrors++;
|
|
|
|
/*
|
|
* give receive buffer area back to chip.
|
|
*
|
|
* If this was the last packet in the RRA, give the RRA to
|
|
* the chip again.
|
|
* If sonic read didnt copy it out then we would have to
|
|
* wait !!
|
|
* (dont bother add it back in again straight away)
|
|
*
|
|
* Really, we're doing v_rra[rramark] = v_rra[orra] but
|
|
* we have to use the macros because SONIC might be in
|
|
* 16 or 32 bit mode.
|
|
*/
|
|
if (status & RCR_LPKT) {
|
|
u_int32_t tmp1, tmp2;
|
|
|
|
rramark = sc->sc_rramark;
|
|
tmp1 = sc->v_rra[rramark];
|
|
tmp2 = sc->v_rra[orra];
|
|
SWO(sc, tmp1, RXRSRC_PTRLO,
|
|
SRO(sc, tmp2, RXRSRC_PTRLO));
|
|
SWO(sc, tmp1, RXRSRC_PTRHI,
|
|
SRO(sc, tmp2, RXRSRC_PTRHI));
|
|
SWO(sc, tmp1, RXRSRC_WCLO,
|
|
SRO(sc, tmp2, RXRSRC_WCLO));
|
|
SWO(sc, tmp1, RXRSRC_WCHI,
|
|
SRO(sc, tmp2, RXRSRC_WCHI));
|
|
|
|
/* zap old rra for fun */
|
|
SWO(sc, tmp2, RXRSRC_WCHI, 0);
|
|
SWO(sc, tmp2, RXRSRC_WCLO, 0);
|
|
|
|
sc->sc_rramark = (++rramark) & RRAMASK;
|
|
NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[rramark]));
|
|
wbflush();
|
|
}
|
|
|
|
/*
|
|
* give receive descriptor back to chip simple
|
|
* list is circular
|
|
*/
|
|
rdamark = sc->sc_rdamark;
|
|
SWO(sc, rda, RXPKT_INUSE, 1);
|
|
SWO(sc, rda, RXPKT_RLINK,
|
|
SRO(sc, rda, RXPKT_RLINK) | EOL);
|
|
SWO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))), RXPKT_RLINK,
|
|
SRO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))),
|
|
RXPKT_RLINK) & ~EOL);
|
|
sc->sc_rdamark = sc->sc_rxmark;
|
|
|
|
if (++sc->sc_rxmark >= sc->sc_nrda)
|
|
sc->sc_rxmark = 0;
|
|
rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* sonic_read -- pull packet off interface and forward to
|
|
* appropriate protocol handler
|
|
*/
|
|
hide int
|
|
sonic_read(sc, pkt, len)
|
|
struct snc_softc *sc;
|
|
u_int32_t pkt;
|
|
int len;
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
struct ether_header *et;
|
|
struct mbuf *m;
|
|
|
|
if (len <= sizeof(struct ether_header) ||
|
|
len > ETHERMTU + sizeof(struct ether_header)) {
|
|
device_printf(sc->sc_dev,
|
|
"invalid packet length %d bytes\n", len);
|
|
return (0);
|
|
}
|
|
|
|
/* Pull packet off interface. */
|
|
m = sonic_get(sc, pkt, len);
|
|
if (m == 0) {
|
|
return (0);
|
|
}
|
|
|
|
/* We assume that the header fit entirely in one mbuf. */
|
|
et = mtod(m, struct ether_header *);
|
|
|
|
#ifdef SNCDEBUG
|
|
if ((sncdebug & SNC_SHOWRXHDR) != 0)
|
|
{
|
|
device_printf(sc->sc_dev, "rcvd 0x%x len=%d type=0x%x from %6D",
|
|
pkt, len, htons(et->ether_type),
|
|
et->ether_shost, ":");
|
|
printf(" (to %6D)\n", et->ether_dhost, ":");
|
|
}
|
|
#endif /* SNCDEBUG */
|
|
|
|
/* Pass the packet up. */
|
|
(*ifp->if_input)(ifp, m);
|
|
return (1);
|
|
}
|
|
|
|
|
|
/*
|
|
* munge the received packet into an mbuf chain
|
|
*/
|
|
hide struct mbuf *
|
|
sonic_get(sc, pkt, datalen)
|
|
struct snc_softc *sc;
|
|
u_int32_t pkt;
|
|
int datalen;
|
|
{
|
|
struct mbuf *m, *top, **mp;
|
|
int len;
|
|
/*
|
|
* Do not trunc ether_header length.
|
|
* Our sonic_read() and sonic_get() require it.
|
|
*/
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0)
|
|
return (0);
|
|
m->m_pkthdr.rcvif = sc->sc_ifp;
|
|
m->m_pkthdr.len = datalen;
|
|
len = MHLEN;
|
|
top = 0;
|
|
mp = ⊤
|
|
|
|
while (datalen > 0) {
|
|
if (top) {
|
|
MGET(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0) {
|
|
m_freem(top);
|
|
return (0);
|
|
}
|
|
len = MLEN;
|
|
}
|
|
if (datalen >= MINCLSIZE) {
|
|
MCLGET(m, M_DONTWAIT);
|
|
if ((m->m_flags & M_EXT) == 0) {
|
|
if (top) m_freem(top);
|
|
return (0);
|
|
}
|
|
len = MCLBYTES;
|
|
}
|
|
#if 0
|
|
/* XXX: Require? */
|
|
if (!top) {
|
|
register int pad =
|
|
ALIGN(sizeof(struct ether_header)) -
|
|
sizeof(struct ether_header);
|
|
m->m_data += pad;
|
|
len -= pad;
|
|
}
|
|
#endif
|
|
m->m_len = len = min(datalen, len);
|
|
|
|
(*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), pkt, len);
|
|
pkt += len;
|
|
datalen -= len;
|
|
*mp = m;
|
|
mp = &m->m_next;
|
|
}
|
|
|
|
return (top);
|
|
}
|
|
/*
|
|
* Enable power on the interface.
|
|
*/
|
|
int
|
|
snc_enable(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
|
|
#ifdef SNCDEBUG
|
|
device_printf(sc->sc_dev, "snc_enable()\n");
|
|
#endif /* SNCDEBUG */
|
|
|
|
if (sc->sc_enabled == 0 && sc->sc_enable != NULL) {
|
|
if ((*sc->sc_enable)(sc) != 0) {
|
|
device_printf(sc->sc_dev, "device enable failed\n");
|
|
return (EIO);
|
|
}
|
|
}
|
|
|
|
sc->sc_enabled = 1;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Disable power on the interface.
|
|
*/
|
|
void
|
|
snc_disable(sc)
|
|
struct snc_softc *sc;
|
|
{
|
|
|
|
#ifdef SNCDEBUG
|
|
device_printf(sc->sc_dev, "snc_disable()\n");
|
|
#endif /* SNCDEBUG */
|
|
|
|
if (sc->sc_enabled != 0 && sc->sc_disable != NULL) {
|
|
(*sc->sc_disable)(sc);
|
|
sc->sc_enabled = 0;
|
|
}
|
|
}
|
|
|
|
|