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freebsd-skq/sys/dev/snc/dp83932.c
jhb 82bee699d1 Add locking to snc(4) so it is MPSAFE: 
- Add a mutex to the softc to protect the softc and device hardware.
- Use a private timer routine to drive the transmit watchdog timer instead
  of using if_watchdog/if_timer.
- If if_alloc() fails during attach, fail the attach with an error rather
  than panic'ing.
- Clear RUNNING and OACTIVE only in sncstop().
- Don't mess with IFF_UP.
- Don't leak 'struct ifnet' on detach.
- Setup interrupt handler after ether_ifattach().
- Call ether_ifdetach() rather than if_detach() in the pccard detach
  routine.

Tested by:	no one despite repeated requests
2008-08-04 19:19:18 +00:00

1236 lines
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/* $FreeBSD$ */
/* $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/kernel.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>
#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>
static void sncwatchdog(void *);
static void sncinit(void *);
static void sncinit_locked(struct snc_softc *);
static int sncstop(struct snc_softc *sc);
static int sncioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
static void sncstart(struct ifnet *ifp);
static void sncstart_locked(struct ifnet *ifp);
static void sncreset(struct snc_softc *sc);
static void caminitialise(struct snc_softc *);
static void camentry(struct snc_softc *, int, u_char *ea);
static void camprogram(struct snc_softc *);
static void initialise_tda(struct snc_softc *);
static void initialise_rda(struct snc_softc *);
static void initialise_rra(struct snc_softc *);
#ifdef SNCDEBUG
static void camdump(struct snc_softc *sc);
#endif
static void sonictxint(struct snc_softc *);
static void sonicrxint(struct snc_softc *);
static u_int sonicput(struct snc_softc *sc, struct mbuf *m0, int mtd_next);
static int sonic_read(struct snc_softc *, u_int32_t, int);
static 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 *);
#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;
int
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) {
device_printf(sc->sc_dev, "can not if_alloc()\n");
return (ENOMEM);
}
#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;
ifp->if_init = sncinit;
ifp->if_mtu = ETHERMTU;
IFQ_SET_MAXLEN(&ifp->if_snd, 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);
return (0);
}
void
sncshutdown(arg)
void *arg;
{
struct snc_softc *sc = arg;
SNC_ASSERT_LOCKED(sc);
sncstop(sc);
}
/*
* Media change callback.
*/
int
snc_mediachange(ifp)
struct ifnet *ifp;
{
struct snc_softc *sc = ifp->if_softc;
int error;
SNC_LOCK(sc);
if (sc->sc_mediachange)
error = (*sc->sc_mediachange)(sc);
else
error = EINVAL;
SNC_UNLOCK(sc);
return (error);
}
/*
* Media status callback.
*/
void
snc_mediastatus(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct snc_softc *sc = ifp->if_softc;
SNC_LOCK(sc);
if (sc->sc_enabled == 0) {
ifmr->ifm_active = IFM_ETHER | IFM_NONE;
ifmr->ifm_status = 0;
SNC_UNLOCK(sc);
return;
}
if (sc->sc_mediastatus)
(*sc->sc_mediastatus)(sc, ifmr);
SNC_UNLOCK(sc);
}
static 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 err = 0;
switch (cmd) {
case SIOCSIFFLAGS:
SNC_LOCK(sc);
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);
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_locked(sc);
} else if (sc->sc_enabled) {
/*
* reset the interface to pick up any other changes
* in flags
*/
sncreset(sc);
sncstart_locked(ifp);
}
SNC_UNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
SNC_LOCK(sc);
if (sc->sc_enabled == 0) {
err = EIO;
SNC_UNLOCK(sc);
break;
}
sncreset(sc);
SNC_UNLOCK(sc);
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;
}
return (err);
}
/*
* Encapsulate a packet of type family for the local net.
*/
static void
sncstart(ifp)
struct ifnet *ifp;
{
struct snc_softc *sc = ifp->if_softc;
SNC_LOCK(sc);
sncstart_locked(ifp);
SNC_UNLOCK(sc);
}
static void
sncstart_locked(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.
*/
static void
sncreset(sc)
struct snc_softc *sc;
{
sncstop(sc);
sncinit_locked(sc);
}
static void
sncinit(xsc)
void *xsc;
{
struct snc_softc *sc = xsc;
SNC_LOCK(sc);
sncinit_locked(sc);
SNC_UNLOCK(sc);
}
static void
sncinit_locked(struct snc_softc *sc)
{
u_long s_rcr;
if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
/* already running */
return;
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;
callout_reset(&sc->sc_timer, hz, sncwatchdog, sc);
return;
}
/*
* close down an interface and free its buffers
* Called on final close of device, or if sncinit() fails
* part way through.
*/
static int
sncstop(sc)
struct snc_softc *sc;
{
struct mtd *mtd;
SNC_ASSERT_LOCKED(sc);
/* 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;
}
callout_stop(&sc->sc_timer);
sc->sc_tx_timeout = 0;
sc->sc_ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
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.
*/
static void
sncwatchdog(void *arg)
{
struct snc_softc *sc = arg;
struct mtd *mtd;
SNC_ASSERT_LOCKED(sc);
if (sc->sc_tx_timeout && --sc->sc_tx_timeout == 0) {
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));
sncreset(sc);
}
}
callout_reset(&sc->sc_timer, hz, sncwatchdog, sc);
}
/*
* stuff packet into sonic
*/
static 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();
/* 5 seconds to watch for failing to transmit */
sc->sc_tx_timeout = 5;
return (totlen);
}
/*
* These are called from sonicioctl() when /etc/ifconfig is run to set
* the address or switch the i/f on.
*/
/*
* CAM support
*/
static 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
}
static 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)));
}
static 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, IF_LLADDR(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
static 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
static 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));
}
static 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();
}
static 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(PAGE_SIZE/2));
SWO(sc, sc->v_rra[i], RXRSRC_WCLO, LOWER(PAGE_SIZE/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;
SNC_LOCK(sc);
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_locked(sc->sc_ifp);
}
SNC_UNLOCK(sc);
return;
}
/*
* Transmit interrupt routine
*/
static 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 */
sc->sc_tx_timeout = 0;
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
*/
static 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 PAGE_MASK require? */
u_int32_t pkt =
sc->rbuf[orra & RBAMASK] + (rxpkt_ptr & PAGE_MASK);
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
*/
static 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. */
SNC_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
SNC_LOCK(sc);
return (1);
}
/*
* munge the received packet into an mbuf chain
*/
static 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 = &top;
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;
}
}
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