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NetBSD/sys/arch/alpha/tc/if_le.c
cgd 610d597217 adjust for networking code changes
1995-04-22 12:34:15 +00:00

1281 lines
30 KiB
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/* $NetBSD: if_le.c,v 1.4 1995/04/22 12:34:15 cgd Exp $ */
/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 "le.h"
#if NLE > 0
#include <bpfilter.h>
/*
* AMD 7990 LANCE
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/buf.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/netisr.h>
#include <net/route.h>
#if NBPFILTER > 0
#include <sys/select.h>
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#ifdef APPLETALK
#include <netddp/atalk.h>
#endif
#if defined (CCITT) && defined (LLC)
#include <sys/socketvar.h>
#include <netccitt/x25.h>
extern llc_ctlinput(), cons_rtrequest();
#endif
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <alpha/tc/tc.h>
#include <alpha/tc/asic.h>
#include <alpha/tc/if_lereg.h>
int ledebug = 1; /* console error messages */
#ifdef PACKETSTATS
long lexpacketsizes[LEMTU+1];
long lerpacketsizes[LEMTU+1];
#endif
/* Per interface statistics */
/* XXX this should go in something like if_levar.h */
struct lestats {
long lexints; /* transmitter interrupts */
long lerints; /* receiver interrupts */
long lerbufs; /* total buffers received during interrupts */
long lerhits; /* times current rbuf was full */
long lerscans; /* rbufs scanned before finding first full */
};
/*
* Ethernet software status per interface.
*
* Each interface is referenced by a network interface structure,
* le_if, which the routing code uses to locate the interface.
* This structure contains the output queue for the interface, its address, ...
*/
struct le_softc {
struct device sc_dev; /* base structure */
struct evcnt sc_intrcnt; /* # of interrupts, per le */
struct evcnt sc_errcnt; /* # of errors, per le */
struct arpcom sc_ac; /* common Ethernet structures */
#define sc_if sc_ac.ac_if /* network-visible interface */
#define sc_addr sc_ac.ac_enaddr /* hardware Ethernet address */
struct lereg1 *sc_r1; /* LANCE registers */
void *sc_r2; /* dual-port RAM */
int sc_ler2pad; /* Do ring descriptors require pads? */
void (*sc_copytobuf)(); /* Copy to buffer */
void (*sc_copyfrombuf)(); /* Copy from buffer */
void (*sc_zerobuf)(); /* and Zero bytes in buffer */
u_char *sc_etheraddr; /* location of ether address PROM */
int sc_rmd; /* predicted next rmd to process */
int sc_tmd; /* last tmd processed */
int sc_tmdnext; /* next tmd to transmit with */
int sc_runt;
int sc_jab;
int sc_merr;
int sc_babl;
int sc_cerr;
int sc_miss;
int sc_xint;
int sc_xown;
int sc_uflo;
int sc_rxlen;
int sc_rxoff;
int sc_txoff;
int sc_busy;
short sc_iflags;
struct lestats sc_lestats; /* per interface statistics */
};
/* access LANCE registers */
void lewritereg();
#define LERDWR(cntl, src, dst) { (dst) = (src); MB(); }
#define LEWREG(src, dst) lewritereg(&(dst), (src))
#define CPU_TO_CHIP_ADDR(cpu) \
((unsigned long)(&(((struct lereg2 *)0)->cpu)))
#define LE_OFFSET_RAM 0x0
#define LE_OFFSET_LANCE 0x100000
#define LE_OFFSET_ROM 0x1c0000
void copytobuf_contig(), copyfrombuf_contig(), bzerobuf_contig();
void copytobuf_gap16(), copyfrombuf_gap16(), bzerobuf_gap16();
extern caddr_t le_iomem;
/* autoconfiguration driver */
int lematch(struct device *, void *, void *);
void leattach(struct device *, struct device *, void *);
struct cfdriver lecd =
{ NULL, "le", lematch, leattach, DV_IFNET, sizeof (struct le_softc) };
/* Forwards */
int le_setup __P((int, void *, struct le_softc *)); /* XXX */
void ledrinit(struct le_softc *);
void leerror(struct le_softc *, int);
struct mbuf *leget(struct le_softc *, char *, int, int, struct ifnet *);
int leinit(int);
int leintr(void *);
int leioctl(struct ifnet *, u_long, caddr_t);
int leput(struct le_softc *, char *, struct mbuf *);
void lererror(struct le_softc *, char *);
void leread(struct le_softc *, char *, int);
void lereset(struct device *);
void lerint(struct le_softc *);
void lestart(struct ifnet *);
void lexerror(struct le_softc *);
void lexint(struct le_softc *);
/* FROM HERE ON DOWN: XXX */
int
lematch(parent, cfdata, aux)
struct device *parent;
void *cfdata;
void *aux;
{
struct cfdata *cf = cfdata;
struct confargs *ca = aux;
#ifdef notdef /* XXX */
struct tc_cfloc *tc_locp;
struct asic_cfloc *asic_locp;
#endif
#ifdef notdef /* XXX */
tclocp = (struct tc_cfloc *)cf->cf_loc;
#endif
/* XXX CHECK BUS */
/* make sure that we're looking for this type of device. */
#ifdef notdef
if (!BUS_MATCHNAME(ca, "PMAD-BA "))
#endif
if (!BUS_MATCHNAME(ca, "lance"))
return (0);
#ifdef notdef /* XXX */
/* make sure the unit matches the cfdata */
if ((cf->cf_unit != tap->ta_unit &&
tap->ta_unit != TA_ANYUNIT) ||
(tclocp->cf_slot != tap->ta_slot &&
tclocp->cf_slot != TC_SLOT_WILD) ||
(tclocp->cf_offset != tap->ta_offset &&
tclocp->cf_offset != TC_OFFSET_WILD))
return (0);
#endif
return (1);
}
void
leattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
register struct le_softc *sc = (struct le_softc *)self;
struct confargs *ca = aux;
struct lereg1 *ler1;
struct ifnet *ifp = &sc->sc_if;
u_char *cp;
int i;
le_setup(self->dv_unit, aux, sc);
ler1 = sc->sc_r1;
/*
* Get the ethernet address out of rom
*/
for (i = 0, cp = sc->sc_etheraddr; i < sizeof(sc->sc_addr); i++) {
sc->sc_addr[i] = *cp;
cp += 4;
}
printf(": address %s\n", ether_sprintf(sc->sc_addr));
/* make sure the chip is stopped */
LEWREG(LE_CSR0, ler1->ler1_rap);
LEWREG(LE_C0_STOP, ler1->ler1_rdp);
/*
* Set up event counters.
*/
evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt);
evcnt_attach(&sc->sc_dev, "errs", &sc->sc_errcnt);
BUS_INTR_ESTABLISH(ca, leintr, sc);
ifp->if_unit = sc->sc_dev.dv_unit;
ifp->if_name = "le";
ifp->if_ioctl = leioctl;
ifp->if_start = lestart;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
#ifdef IFF_NOTRAILERS
/* XXX still compile when the blasted things are gone... */
ifp->if_flags |= IFF_NOTRAILERS;
#endif
#if NBPFILTER > 0
bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
if_attach(ifp);
ether_ifattach(ifp);
}
int
le_setup(unit, aux, sc)
int unit;
void *aux;
struct le_softc *sc;
{
struct confargs *ca = aux;
if (unit == 0 && (hwrpb->rpb_type == ST_DEC_3000_300 ||
hwrpb->rpb_type == ST_DEC_3000_500)) {
/* It's on the system ASIC */
volatile u_int *ldp;
sc->sc_r1 = (struct lereg1 *)BUS_CVTADDR(ca);
#ifdef SPARSE
sc->sc_r1 = TC_DENSE_TO_SPARSE(sc->sc_r1);
#endif
sc->sc_r2 = (void *)le_iomem;
sc->sc_ler2pad = 1;
/* XXX */ sc->sc_etheraddr = (u_char *)ASIC_SYS_ETHER_ADDRESS(asic_base);
sc->sc_copytobuf = copytobuf_gap16;
sc->sc_copyfrombuf = copyfrombuf_gap16;
sc->sc_zerobuf = bzerobuf_gap16;
/*
* And enable Lance dma through the asic.
*/
ldp = (volatile u_int *)ASIC_REG_LANCE_DMAPTR(asic_base);
*ldp = (((u_int64_t)le_iomem << 3) & ~(u_int64_t)0x1f) |
(((u_int64_t)le_iomem >> 29) & 0x1f);
*(volatile u_int *)ASIC_REG_CSR(asic_base) |=
ASIC_CSR_DMAEN_LANCE;
MB();
} else {
/* It's on the turbochannel proper */
sc->sc_r1 = (struct lereg1 *)
(BUS_CVTADDR(ca) + LE_OFFSET_LANCE);
sc->sc_r2 = (void *)
(BUS_CVTADDR(ca) + LE_OFFSET_RAM);
sc->sc_ler2pad = 0;
sc->sc_etheraddr = (u_char *)
(BUS_CVTADDR(ca) + LE_OFFSET_ROM + 2);
sc->sc_copytobuf = copytobuf_contig;
sc->sc_copyfrombuf = copyfrombuf_contig;
sc->sc_zerobuf = bzerobuf_contig;
}
return (0);
}
/*
* Setup the logical address filter
*/
void
lesetladrf(sc)
register struct le_softc *sc;
{
register volatile struct lereg2 *ler2 = sc->sc_r2;
register struct ifnet *ifp = &sc->sc_if;
register struct ether_multi *enm;
register u_char *cp, c;
register u_long crc;
register int i, len;
struct ether_multistep step;
/*
* 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.
*/
LER2_ladrf0(ler2, 0);
LER2_ladrf1(ler2, 0);
LER2_ladrf2(ler2, 0);
LER2_ladrf3(ler2, 0);
ifp->if_flags &= ~IFF_ALLMULTI;
ETHER_FIRST_MULTI(step, &sc->sc_ac, enm);
while (enm != NULL) {
if (bcmp((caddr_t)enm->enm_addrlo,
(caddr_t)enm->enm_addrhi, sizeof(enm->enm_addrlo)) == 0) {
/*
* We must listen to a range of multicast
* addresses. For now, just accept all
* multicasts, rather than trying to set only
* those filter bits needed to match the range.
* (At this time, the only use of address
* ranges is for IP multicast routing, for
* which the range is big enough to require all
* bits set.)
*/
LER2_ladrf0(ler2, 0xff);
LER2_ladrf1(ler2, 0xff);
LER2_ladrf2(ler2, 0xff);
LER2_ladrf3(ler2, 0xff);
ifp->if_flags |= IFF_ALLMULTI;
return;
}
/*
* One would think, given the AM7990 document's polynomial
* of 0x04c11db6, that this should be 0x6db88320 (the bit
* reversal of the AMD value), but that is not right. See
* the BASIC listing: bit 0 (our bit 31) must then be set.
*/
cp = (unsigned char *)enm->enm_addrlo;
crc = 0xffffffff;
for (len = 6; --len >= 0;) {
c = *cp++;
for (i = 0; i < 8; i++) {
if ((crc & 0x01) ^ (c & 0x01)) {
crc >>= 1;
crc ^= 0xedb88320;
} else
crc >>= 1;
c >>= 1;
}
}
/* Just want the 6 most significant bits. */
crc = crc >> 26;
/* Turn on the corresponding bit in the filter. */
switch (crc >> 5) { /* XXX VS SPARC */
case 0:
LER2_ladrf0(ler2,
LER2V_ladrf0(ler2) | 1 << (crc & 0x1f));
break;
case 1:
LER2_ladrf1(ler2,
LER2V_ladrf1(ler2) | 1 << (crc & 0x1f));
break;
case 2:
LER2_ladrf2(ler2,
LER2V_ladrf2(ler2) | 1 << (crc & 0x1f));
break;
case 3:
LER2_ladrf3(ler2,
LER2V_ladrf3(ler2) | 1 << (crc & 0x1f));
break;
}
ETHER_NEXT_MULTI(step, enm);
}
}
void
ledrinit(sc)
struct le_softc *sc;
{
register void *rp;
register int i;
for (i = 0; i < LERBUF; i++) {
rp = LER2_RMDADDR(sc->sc_r2, i);
LER2_rmd0(rp, CPU_TO_CHIP_ADDR(ler2_rbuf[i][0])); /*XXX*/
LER2_rmd1_bits(rp, LE_T1_OWN);
LER2_rmd1_hadr(rp, 0); /*XXX*/
LER2_rmd2(rp, -LEMTU | LE_XMD2_ONES);
LER2_rmd3(rp, 0);
}
for (i = 0; i < LETBUF; i++) {
rp = LER2_TMDADDR(sc->sc_r2, i);
LER2_tmd0(rp, CPU_TO_CHIP_ADDR(ler2_tbuf[i][0])); /*XXX*/
LER2_tmd1_bits(rp, 0);
LER2_tmd1_hadr(rp, 0); /*XXX*/
LER2_tmd2(rp, LE_XMD2_ONES);
LER2_tmd3(rp, 0);
}
}
void
lereset(dev)
struct device *dev;
{
register struct le_softc *sc = (struct le_softc *)dev;
register volatile struct lereg1 *ler1 = sc->sc_r1;
register volatile void *ler2 = sc->sc_r2;
register int timo, stat;
/* XXX YEECH!!! */
*(volatile u_int *)ASIC_REG_IMSK(asic_base) |= ASIC_INTR_LANCE;
MB();
#if NBPFILTER > 0
if (sc->sc_if.if_flags & IFF_PROMISC)
LER2_mode(ler2, LE_MODE_NORMAL | LE_MODE_PROM);
else
#endif
LER2_mode(ler2, LE_MODE_NORMAL);
LEWREG(LE_CSR0, ler1->ler1_rap);
LEWREG(LE_C0_STOP, ler1->ler1_rdp);
/* Setup the logical address filter */
lesetladrf(sc);
/* init receive and transmit rings */
ledrinit(sc);
sc->sc_rmd = 0; /* XXX ??? */
sc->sc_tmd = LETBUF - 1; /* XXX ??? */
sc->sc_tmdnext = 0; /* XXX ??? */
/*
* Setup for transmit/receive
* XXX ???
*/
LER2_padr0(ler2, (sc->sc_addr[1] << 8) | sc->sc_addr[0]);
LER2_padr1(ler2, (sc->sc_addr[3] << 8) | sc->sc_addr[2]);
LER2_padr2(ler2, (sc->sc_addr[5] << 8) | sc->sc_addr[4]);
LER2_rlen(ler2, LE_RLEN);
LER2_rdra(ler2, CPU_TO_CHIP_ADDR(ler2_rmd[0]));
LER2_tlen(ler2, LE_TLEN);
LER2_tdra(ler2, CPU_TO_CHIP_ADDR(ler2_tmd[0]));
/* tell the chip where to find the initialization block */
LEWREG(LE_CSR1, ler1->ler1_rap);
LEWREG(CPU_TO_CHIP_ADDR(ler2_mode), ler1->ler1_rdp);
LEWREG(LE_CSR2, ler1->ler1_rap);
LEWREG(0, ler1->ler1_rdp);
LEWREG(LE_CSR3, ler1->ler1_rap);
LEWREG(0, ler1->ler1_rdp);
LEWREG(LE_CSR0, ler1->ler1_rap);
LERDWR(ler0, LE_C0_INIT, ler1->ler1_rdp);
timo = 100000;
while (((stat = ler1->ler1_rdp) & (LE_C0_ERR | LE_C0_IDON)) == 0) {
if (--timo == 0) {
printf("%s: init timeout, stat=%b\n",
sc->sc_dev.dv_xname, stat, LE_C0_BITS);
break;
}
}
if (stat & LE_C0_ERR)
printf("%s: init failed, stat=%b\n",
sc->sc_dev.dv_xname, stat, LE_C0_BITS);
else
LERDWR(ler0, LE_C0_IDON, ler1->ler1_rdp); /* clear IDON */
LERDWR(ler0, LE_C0_STRT | LE_C0_INEA, ler1->ler1_rdp);
sc->sc_if.if_flags &= ~IFF_OACTIVE;
}
/*
* Initialization of interface
*/
int
leinit(unit)
int unit;
{
register struct le_softc *sc = lecd.cd_devs[unit];
register struct ifnet *ifp = &sc->sc_if;
register int s;
/* not yet, if address still unknown */
if (ifp->if_addrlist == (struct ifaddr *)0)
return (0);
if ((ifp->if_flags & IFF_RUNNING) == 0) {
s = splimp();
ifp->if_flags |= IFF_RUNNING;
lereset(&sc->sc_dev);
lestart(ifp);
splx(s);
}
return (0);
}
#define LENEXTTMP \
if (++bix == LETBUF) \
bix = 0; \
tmd = LER2_TMDADDR(sc->sc_r2, bix)
/*
* Start output on interface. Get another datagram to send
* off of the interface queue, and copy it to the interface
* before starting the output.
*/
void
lestart(ifp)
struct ifnet *ifp;
{
register struct le_softc *sc = lecd.cd_devs[ifp->if_unit];
register volatile void *tmd;
register struct mbuf *m;
register int bix, len;
if ((sc->sc_if.if_flags & IFF_RUNNING) == 0)
return;
bix = sc->sc_tmdnext;
len = 0;
tmd = LER2_TMDADDR(sc->sc_r2, bix);
while (bix != sc->sc_tmd) {
if (LER2V_tmd1_bits(tmd) & LE_T1_OWN)
panic("lestart");
IF_DEQUEUE(&sc->sc_if.if_snd, m);
if (m == 0)
break;
#if NBPFILTER > 0
/*
* If bpf is listening on this interface, let it
* see the packet before we commit it to the wire.
*/
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
len = leput(sc, LER2_TBUFADDR(sc->sc_r2, bix), m);
#ifdef PACKETSTATS
if (len <= LEMTU)
lexpacketsizes[len]++;
#endif
LER2_tmd3(tmd, 0);
LER2_tmd2(tmd, -len | LE_XMD2_ONES);
LER2_tmd1_bits(tmd, LE_T1_OWN | LE_T1_STP | LE_T1_ENP);
LENEXTTMP;
}
if (len != 0) {
sc->sc_if.if_flags |= IFF_OACTIVE;
LERDWR(ler0, LE_C0_TDMD | LE_C0_INEA, sc->sc_r1->ler1_rdp);
}
sc->sc_tmdnext = bix;
return;
}
int
leintr(dev)
register void *dev;
{
register struct le_softc *sc = dev;
register volatile struct lereg1 *ler1 = sc->sc_r1;
register int csr0;
csr0 = ler1->ler1_rdp;
if ((csr0 & LE_C0_INTR) == 0)
return (0);
sc->sc_intrcnt.ev_count++;
if (csr0 & LE_C0_ERR) {
sc->sc_errcnt.ev_count++;
leerror(sc, csr0);
if (csr0 & LE_C0_MERR) {
sc->sc_merr++;
lereset(&sc->sc_dev);
return (1);
}
if (csr0 & LE_C0_BABL)
sc->sc_babl++;
if (csr0 & LE_C0_CERR)
sc->sc_cerr++;
if (csr0 & LE_C0_MISS)
sc->sc_miss++;
LERDWR(ler0, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_INEA,
ler1->ler1_rdp);
}
if ((csr0 & LE_C0_RXON) == 0) {
sc->sc_rxoff++;
lereset(&sc->sc_dev);
return (1);
}
if ((csr0 & LE_C0_TXON) == 0) {
sc->sc_txoff++;
lereset(&sc->sc_dev);
return (1);
}
if (csr0 & LE_C0_RINT) {
/* interrupt is cleared in lerint */
lerint(sc);
}
if (csr0 & LE_C0_TINT) {
LERDWR(ler0, LE_C0_TINT|LE_C0_INEA, ler1->ler1_rdp);
lexint(sc);
}
return (1);
}
/*
* Ethernet interface transmitter interrupt.
* Start another output if more data to send.
*/
void
lexint(sc)
register struct le_softc *sc;
{
register int bix = sc->sc_tmd;
register volatile void *tmd;
sc->sc_lestats.lexints++;
if ((sc->sc_if.if_flags & IFF_OACTIVE) == 0) {
sc->sc_xint++;
return;
}
LENEXTTMP;
while (bix != sc->sc_tmdnext &&
(LER2V_tmd1_bits(tmd) & LE_T1_OWN) == 0) {
sc->sc_tmd = bix;
if (LER2V_tmd1_bits(tmd) & LE_T1_ERR) {
err:
lexerror(sc);
sc->sc_if.if_oerrors++;
if (LER2V_tmd3(tmd) & (LE_T3_BUFF|LE_T3_UFLO)) {
sc->sc_uflo++;
lereset(&sc->sc_dev);
break;
}
else if (LER2V_tmd3(tmd) & LE_T3_LCOL)
sc->sc_if.if_collisions++;
else if (LER2V_tmd3(tmd) & LE_T3_RTRY)
sc->sc_if.if_collisions += 16;
}
else if (LER2V_tmd1_bits(tmd) & LE_T3_BUFF)
/* XXX documentation says BUFF not included in ERR */
goto err;
else if (LER2V_tmd1_bits(tmd) & LE_T1_ONE)
sc->sc_if.if_collisions++;
else if (LER2V_tmd1_bits(tmd) & LE_T1_MORE)
/* what is the real number? */
sc->sc_if.if_collisions += 2;
else
sc->sc_if.if_opackets++;
LENEXTTMP;
}
if (bix == sc->sc_tmdnext)
sc->sc_if.if_flags &= ~IFF_OACTIVE;
lestart(&sc->sc_if);
}
#define LENEXTRMP \
if (++bix == LERBUF) \
bix = 0; \
rmd = LER2_RMDADDR(sc->sc_r2, bix)
/*
* Ethernet interface receiver interrupt.
* If input error just drop packet.
* Decapsulate packet based on type and pass to type specific
* higher-level input routine.
*/
void
lerint(sc)
struct le_softc *sc;
{
register int bix = sc->sc_rmd;
register volatile void *rmd = LER2_RMDADDR(sc->sc_r2, bix);
sc->sc_lestats.lerints++;
/*
* Out of sync with hardware, should never happen?
*/
if (LER2V_rmd1_bits(rmd) & LE_R1_OWN) {
do {
sc->sc_lestats.lerscans++;
LENEXTRMP;
} while ((LER2V_rmd1_bits(rmd) & LE_R1_OWN) && bix != sc->sc_rmd);
if (bix == sc->sc_rmd)
printf("%s: RINT with no buffer\n",
sc->sc_dev.dv_xname);
} else
sc->sc_lestats.lerhits++;
/*
* Process all buffers with valid data
*/
while ((LER2V_rmd1_bits(rmd) & LE_R1_OWN) == 0) {
int len = LER2V_rmd3(rmd);
/* Clear interrupt to avoid race condition */
LERDWR(sc->sc_r0, LE_C0_RINT|LE_C0_INEA, sc->sc_r1->ler1_rdp);
if (LER2V_rmd1_bits(rmd) & LE_R1_ERR) {
sc->sc_rmd = bix;
lererror(sc, "bad packet");
sc->sc_if.if_ierrors++;
} else if ((LER2V_rmd1_bits(rmd) & (LE_R1_STP|LE_R1_ENP)) !=
(LE_R1_STP|LE_R1_ENP)) {
/* XXX make a define for LE_R1_STP|LE_R1_ENP? */
/*
* Find the end of the packet so we can see how long
* it was. We still throw it away.
*/
do {
LERDWR(sc->sc_r0, LE_C0_RINT|LE_C0_INEA,
sc->sc_r1->ler1_rdp);
LER2_rmd3(rmd, 0);
LER2_rmd1_bits(rmd, LE_R1_OWN);
LENEXTRMP;
} while (!(LER2V_rmd1_bits(rmd) &
(LE_R1_OWN|LE_R1_ERR|LE_R1_STP|LE_R1_ENP)));
sc->sc_rmd = bix;
lererror(sc, "chained buffer");
sc->sc_rxlen++;
/*
* If search terminated without successful completion
* we reset the hardware (conservative).
*/
if ((LER2V_rmd1_bits(rmd) &
(LE_R1_OWN|LE_R1_ERR|LE_R1_STP|LE_R1_ENP)) !=
LE_R1_ENP) {
lereset(&sc->sc_dev);
return;
}
} else {
leread(sc, LER2_RBUFADDR(sc->sc_r2, bix), len);
#ifdef PACKETSTATS
lerpacketsizes[len]++;
#endif
sc->sc_lestats.lerbufs++;
}
LER2_rmd3(rmd, 0);
LER2_rmd1_bits(rmd, LE_R1_OWN);
LENEXTRMP;
}
sc->sc_rmd = bix;
}
/*
* Look at the packet in network buffer memory so we can be smart about how
* we copy the data into mbufs.
* This needs work since we can't just read network buffer memory like
* regular memory.
*/
void
leread(sc, buf, len)
register struct le_softc *sc;
char *buf;
int len;
{
struct ifnet *ifp;
struct mbuf *m;
struct ether_header eh;
/* get the header */
(*sc->sc_copyfrombuf)(buf, 0, (char *)&eh, sizeof (eh));
/* adjust input length to account for header and CRC */
len -= sizeof(struct ether_header) + 4;
if (len <= 0)
return;
/* Pull packet off interface. */
ifp = &sc->sc_ac.ac_if;
m = leget(sc, buf, len, 0, ifp);
if (m == 0)
return;
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface.
* If so, hand off the raw packet to BPF.
*/
if (ifp->if_bpf) {
M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT);
if (m == 0)
return;
bcopy(&eh, mtod(m, void *), sizeof(struct ether_header));
bpf_mtap(ifp->if_bpf, m);
m_adj(m, sizeof(struct ether_header));
/*
* Note that the interface cannot be in promiscuous mode if
* there are no BPF listeners. And if we are in promiscuous
* mode, we have to check if this packet is really ours.
*/
if ((ifp->if_flags & IFF_PROMISC) &&
(eh.ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */
bcmp(eh.ether_dhost, sc->sc_ac.ac_enaddr,
sizeof(eh.ether_dhost)) != 0) {
m_freem(m);
return;
}
}
#endif
ether_input(ifp, &eh, m);
}
/*
* Routine to copy from mbuf chain to transmit buffer in
* network buffer memory.
*/
int
leput(sc, lebuf, m)
struct le_softc *sc;
char *lebuf;
register struct mbuf *m;
{
register struct mbuf *mp;
register int len, tlen = 0;
register int boff = 0;
for (mp = m; mp; mp = mp->m_next) {
len = mp->m_len;
if (len == 0)
continue;
tlen += len;
(*sc->sc_copytobuf)(mtod(mp, char *), lebuf, boff, len);
boff += len;
}
m_freem(m);
if (tlen < LEMINSIZE) {
(*sc->sc_zerobuf)(lebuf, boff, LEMINSIZE - tlen);
tlen = LEMINSIZE;
}
return(tlen);
}
/*
* Routine to copy from network buffer memory into mbufs.
*/
struct mbuf *
leget(sc, lebuf, totlen, off, ifp)
struct le_softc *sc;
char *lebuf;
int totlen, off;
struct ifnet *ifp;
{
register struct mbuf *m;
struct mbuf *top = 0, **mp = &top;
register int len, resid, boff;
boff = sizeof(struct ether_header);
resid = totlen;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = totlen;
m->m_len = MHLEN;
while (totlen > 0) {
if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
m_freem(top);
return (0);
}
m->m_len = MLEN;
}
if (resid >= MINCLSIZE)
MCLGET(m, M_DONTWAIT);
if (m->m_flags & M_EXT)
m->m_len = min(resid, MCLBYTES);
else if (resid < m->m_len) {
/*
* Place initial small packet/header at end of mbuf.
*/
if (top == 0 && resid + max_linkhdr <= m->m_len)
m->m_data += max_linkhdr;
m->m_len = resid;
}
len = m->m_len;
(*sc->sc_copyfrombuf)(lebuf, boff, mtod(m, char *), len);
boff += len;
*mp = m;
mp = &m->m_next;
totlen -= len;
resid -= len;
if (resid == 0) {
boff = sizeof (struct ether_header);
resid = totlen;
}
}
return (top);
}
/*
* Process an ioctl request.
*/
int
leioctl(ifp, cmd, data)
register struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
register struct ifaddr *ifa;
struct le_softc *sc = lecd.cd_devs[ifp->if_unit];
register struct lereg1 *ler1;
int s = splimp(), error = 0;
switch (cmd) {
case SIOCSIFADDR:
ifa = (struct ifaddr *)data;
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
(void)leinit(ifp->if_unit);
arp_ifinit(&sc->sc_ac, ifa);
break;
#endif
#ifdef NS
case AF_NS:
{
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
if (ns_nullhost(*ina))
ina->x_host = *(union ns_host *)(sc->sc_addr);
else {
/*
* The manual says we can't change the address
* while the receiver is armed,
* so reset everything
*/
ifp->if_flags &= ~IFF_RUNNING;
LEWREG(LE_C0_STOP, ler1->ler1_rdp);
bcopy((caddr_t)ina->x_host.c_host,
(caddr_t)sc->sc_addr, sizeof(sc->sc_addr));
}
(void)leinit(ifp->if_unit); /* does le_setaddr() */
break;
}
#endif
default:
leinit(ifp->if_unit);
break;
}
break;
#if defined (CCITT) && defined (LLC)
case SIOCSIFCONF_X25:
ifp->if_flags |= IFF_UP;
ifa->ifa_rtrequest = (void (*)())cons_rtrequest; /* XXX */
error = x25_llcglue(PRC_IFUP, ifa->ifa_addr);
if (error == 0)
leinit(ifp->if_unit);
break;
#endif /* CCITT && LLC */
case SIOCSIFFLAGS:
ler1 = sc->sc_r1;
if ((ifp->if_flags & IFF_UP) == 0 &&
ifp->if_flags & IFF_RUNNING) {
LEWREG(LE_C0_STOP, ler1->ler1_rdp);
ifp->if_flags &= ~IFF_RUNNING;
} else if (ifp->if_flags & IFF_UP &&
(ifp->if_flags & IFF_RUNNING) == 0)
leinit(ifp->if_unit);
/*
* If the state of the promiscuous bit changes, the interface
* must be reset to effect the change.
*/
if (((ifp->if_flags ^ sc->sc_iflags) & IFF_PROMISC) &&
(ifp->if_flags & IFF_RUNNING)) {
sc->sc_iflags = ifp->if_flags;
lereset(&sc->sc_dev);
lestart(ifp);
}
break;
case SIOCADDMULTI:
error = ether_addmulti((struct ifreq *)data, &sc->sc_ac);
goto update_multicast;
case SIOCDELMULTI:
error = ether_delmulti((struct ifreq *)data, &sc->sc_ac);
update_multicast:
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware
* filter accordingly.
*/
lereset(&sc->sc_dev);
error = 0;
}
break;
default:
error = EINVAL;
}
splx(s);
return (error);
}
void
leerror(sc, stat)
register struct le_softc *sc;
int stat;
{
if (!ledebug)
return;
/*
* Not all transceivers implement heartbeat
* so we only log CERR once.
*/
if ((stat & LE_C0_CERR) && sc->sc_cerr)
return;
log(LOG_WARNING, "%s: error: stat=%b\n",
sc->sc_dev.dv_xname, stat, LE_C0_BITS);
}
void
lererror(sc, msg)
register struct le_softc *sc;
char *msg;
{
register void *rmd;
u_char eaddr[6];
int len;
if (!ledebug)
return;
rmd = LER2_RMDADDR(sc->sc_r2, sc->sc_rmd);
len = LER2V_rmd3(rmd);
if (len > 11)
(*sc->sc_copyfrombuf)(LER2_RBUFADDR(sc->sc_r2, sc->sc_rmd),
6, eaddr, 6);
log(LOG_WARNING,
"%s: ierror(%s): from %s: buf=%d, len=%d, rmd1_bits=%b\n",
sc->sc_dev.dv_xname,
msg, len > 11 ? ether_sprintf(eaddr) : "unknown",
sc->sc_rmd, len, LER2V_rmd1_bits(rmd), LE_R1_BITS);
}
void
lexerror(sc)
register struct le_softc *sc;
{
register void *tmd;
u_char eaddr[6];
int len;
if (!ledebug)
return;
tmd = LER2_TMDADDR(sc->sc_r2, 0);
len = -LER2V_tmd2(tmd);
if (len > 5)
(*sc->sc_copyfrombuf)(LER2_TBUFADDR(sc->sc_r2, 0), 0, eaddr, 6);
log(LOG_WARNING,
"%s: oerror: to %s: buf=%d, len=%d, tmd1_bits=%b, tmd3=%b\n",
sc->sc_dev.dv_xname,
len > 5 ? ether_sprintf(eaddr) : "unknown", 0, len,
LER2V_tmd1_bits(tmd), LE_T1_BITS,
LER2V_tmd3(tmd), LE_T3_BITS);
}
/*
* Write a lance register port, reading it back to ensure success. This seems
* to be necessary during initialization, since the chip appears to be a bit
* pokey sometimes.
*/
void
lewritereg(regptr, val)
register volatile u_short *regptr;
register u_short val;
{
register int i = 0;
while (*regptr != val) {
*regptr = val;
MB();
if (++i > 10000) {
printf("le: Reg did not settle (to x%x): x%x\n", val,
*regptr);
return;
}
DELAY(100);
}
}
/*
* Routines for accessing the transmit and receive buffers. Unfortunately,
* CPU addressing of these buffers is done in one of 3 ways:
* - contiguous (for the 3max and turbochannel option card)
* - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
* spaces (for the pmax)
* - gap16, which means 16bytes interspersed with 16byte spaces
* for buffers which must begin on a 32byte boundary (for 3min and maxine)
* The buffer offset is the logical byte offset, assuming contiguous storage.
*/
void
copytobuf_contig(from, lebuf, boff, len)
char *from;
void *lebuf;
int boff;
int len;
{
/*
* Just call bcopy() to do the work.
*/
bcopy(from, ((char *)lebuf) + boff, len);
}
void
copyfrombuf_contig(lebuf, boff, to, len)
void *lebuf;
int boff;
char *to;
int len;
{
/*
* Just call bcopy() to do the work.
*/
bcopy(((char *)lebuf) + boff, to, len);
}
void
bzerobuf_contig(lebuf, boff, len)
void *lebuf;
int boff;
int len;
{
/*
* Just let bzero() do the work
*/
bzero(((char *)lebuf) + boff, len);
}
/*
* For the 3min and maxine, the buffers are in main memory filled in with
* 16byte blocks interspersed with 16byte spaces.
*/
void
copytobuf_gap16(from, lebuf, boff, len)
register char *from;
void *lebuf;
int boff;
register int len;
{
register char *bptr;
register int xfer;
bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
while (len > 0) {
bcopy(from, ((char *)bptr) + boff, xfer);
from += xfer;
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
}
}
void
copyfrombuf_gap16(lebuf, boff, to, len)
void *lebuf;
int boff;
register char *to;
register int len;
{
register char *bptr;
register int xfer;
bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
while (len > 0) {
bcopy(((char *)bptr) + boff, to, xfer);
to += xfer;
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
}
}
void
bzerobuf_gap16(lebuf, boff, len)
void *lebuf;
int boff;
register int len;
{
register char *bptr;
register int xfer;
bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
while (len > 0) {
bzero(((char *)bptr) + boff, xfer);
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
}
}
#endif /* NLE */
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