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freebsd-skq/sys/dev/snc/dp83932.c
Maxim Sobolev e50d35e6c6 Add new tunable 'net.link.ifqmaxlen' to set default send interface 
queue length. The default value for this parameter is 50, which is
quite low for many of today's uses and the only way to modify this
parameter right now is to edit if_var.h file. Also add read-only
sysctl with the same name, so that it's possible to retrieve the
current value.

MFC after:	1 month
2010-05-03 07:32:50 +00:00

1236 lines
28 KiB
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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, ifqmaxlen);
/* 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_maddr_rlock(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_maddr_runlock(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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