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NetBSD/sys/arch/pmax/dev/if_le.c

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/* $NetBSD: if_le.c,v 1.13 1995/05/31 00:15:46 jonathan 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
*
* This driver will generate and accept trailer encapsulated packets even
* though it buys us nothing. The motivation was to avoid incompatibilities
* with VAXen, SUNs, and others that handle and benefit from them.
* This reasoning is dubious.
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/buf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/netisr.h>
#include <net/route.h>
#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
#if defined (CCITT) && defined (LLC)
#include <sys/socketvar.h>
#include <netccitt/x25.h>
extern llc_ctlinput(), cons_rtrequest();
#endif
#include <machine/machConst.h>
#include <pmax/pmax/pmaxtype.h>
#include <pmax/pmax/kn01.h>
#include <pmax/pmax/kmin.h>
#include <pmax/pmax/asic.h>
#include <pmax/dev/device.h>
#include <pmax/dev/if_lereg.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
int leprobe();
void leintr();
struct driver ledriver = {
"le", leprobe, 0, 0, leintr,
};
int ledebug = 1; /* console error messages */
/*
* 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 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 */
volatile struct lereg1 *sc_r1; /* LANCE registers */
volatile void *sc_r2; /* dual-port RAM */
int sc_ler2pad; /* Do ring descriptors require short pads? */
void (*sc_copytobuf)(); /* Copy to buffer */
void (*sc_copyfrombuf)(); /* Copy from buffer */
void (*sc_zerobuf)(); /* and Zero bytes in buffer */
int sc_rmd; /* predicted next rmd to process */
int sc_tmd; /* last tmd processed */
int sc_tmdnext; /* next tmd to transmit with */
/* stats */
int sc_runt;
int sc_merr;
int sc_babl;
int sc_cerr;
int sc_miss;
int sc_rown;
int sc_xint;
int sc_uflo;
int sc_rxlen;
int sc_rxoff;
int sc_txoff;
int sc_busy;
short sc_iflags;
} le_softc[NLE];
/* access LANCE registers */
static void lewritereg();
#define LERDWR(cntl, src, dst) { (dst) = (src); DELAY(10); }
#define LEWREG(src, dst) lewritereg(&(dst), (src))
#define CPU_TO_CHIP_ADDR(cpu) \
((unsigned)(&(((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_gap2(), copyfrombuf_gap2(), bzerobuf_gap2();
void copytobuf_gap16(), copyfrombuf_gap16(), bzerobuf_gap16();
extern int pmax_boardtype;
extern u_long le_iomem;
extern u_long asic_base;
int leioctl __P((struct ifnet *, u_long, caddr_t));
void lestart __P((struct ifnet *));
void leinit __P((int));
void lereset __P((int));
/*
* Test to see if device is present.
* Return true if found and initialized ok.
* If interface exists, make available by filling in network interface
* record. System will initialize the interface when it is ready
* to accept packets.
*/
leprobe(dp)
struct pmax_ctlr *dp;
{
volatile struct lereg1 *ler1;
struct le_softc *le = &le_softc[dp->pmax_unit];
struct ifnet *ifp = &le->sc_if;
u_char *cp;
int i;
switch (pmax_boardtype) {
case DS_PMAX:
le->sc_r1 = ler1 = (volatile struct lereg1 *)dp->pmax_addr;
le->sc_r2 = (volatile void *)MACH_PHYS_TO_UNCACHED(0x19000000);
cp = (u_char *)(MACH_PHYS_TO_UNCACHED(KN01_SYS_CLOCK) + 1);
le->sc_ler2pad = 1;
le->sc_copytobuf = copytobuf_gap2;
le->sc_copyfrombuf = copyfrombuf_gap2;
le->sc_zerobuf = bzerobuf_gap2;
break;
case DS_3MIN:
case DS_MAXINE:
case DS_3MAXPLUS:
if (dp->pmax_unit == 0) {
volatile u_int *ssr, *ldp;
le->sc_r1 = ler1 = (volatile struct lereg1 *)
ASIC_SYS_LANCE(asic_base);
cp = (u_char *)ASIC_SYS_ETHER_ADDRESS(asic_base);
le->sc_r2 = (volatile void *)
MACH_PHYS_TO_UNCACHED(le_iomem);
le->sc_ler2pad = 1;
le->sc_copytobuf = copytobuf_gap16;
le->sc_copyfrombuf = copyfrombuf_gap16;
le->sc_zerobuf = bzerobuf_gap16;
/*
* And enable Lance dma through the asic.
*/
ssr = (volatile u_int *)ASIC_REG_CSR(asic_base);
ldp = (volatile u_int *)
ASIC_REG_LANCE_DMAPTR(asic_base);
*ldp = (le_iomem << 3); /* phys addr << 3 */
*ssr |= ASIC_CSR_DMAEN_LANCE;
break;
}
/*
* Units other than 0 are turbochannel option boards and fall
* through to DS_3MAX.
*/
case DS_3MAX:
le->sc_r1 = ler1 = (volatile struct lereg1 *)
(dp->pmax_addr + LE_OFFSET_LANCE);
le->sc_r2 = (volatile void *)(dp->pmax_addr + LE_OFFSET_RAM);
cp = (u_char *)(dp->pmax_addr + LE_OFFSET_ROM + 2);
le->sc_ler2pad = 0;
le->sc_copytobuf = copytobuf_contig;
le->sc_copyfrombuf = copyfrombuf_contig;
le->sc_zerobuf = bzerobuf_contig;
break;
default:
printf("Unknown CPU board type %d\n", pmax_boardtype);
return (0);
};
/*
* Get the ethernet address out of rom
*/
for (i = 0; i < sizeof(le->sc_addr); i++) {
le->sc_addr[i] = *cp;
cp += 4;
}
/* make sure the chip is stopped */
LEWREG(LE_CSR0, ler1->ler1_rap);
LEWREG(LE_STOP, ler1->ler1_rdp);
ifp->if_unit = dp->pmax_unit;
ifp->if_name = "le";
ifp->if_ioctl = leioctl;
ifp->if_start = lestart;
#ifdef MULTICAST
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
#else
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
#endif
#if NBPFILTER > 0
bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
if_attach(ifp);
ether_ifattach(ifp);
printf("le%d at nexus0 csr 0x%x priority %d ethernet address %s\n",
dp->pmax_unit, dp->pmax_addr, dp->pmax_pri,
ether_sprintf(le->sc_addr));
return (1);
}
#ifdef MULTICAST
/*
* Setup the logical address filter
*/
void
lesetladrf(le)
register struct le_softc *le;
{
register volatile struct lereg2 *ler2 = le->sc_r2;
register struct ifnet *ifp = &le->sc_if;
register struct ether_multi *enm;
register u_char *cp;
register u_long crc;
register u_long c;
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 a index into the 64 bit logical address
* filter. The high order two bits select the word, while the
* rest of the bits select the bit within the word.
*/
LER2_ladrf0(ler2, 0);
LER2_ladrf1(ler2, 0);
ifp->if_flags &= ~IFF_ALLMULTI;
ETHER_FIRST_MULTI(step, &le->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;
}
cp = (unsigned char *)&enm->enm_addrlo;
c = *cp;
crc = 0xffffffff;
len = 6;
while (len-- > 0) {
c = *cp;
for (i = 0; i < 8; i++) {
if ((c & 0x01) ^ (crc & 0x01)) {
crc >>= 1;
crc = crc ^ 0xedb88320;
}
else
crc >>= 1;
c >>= 1;
}
cp++;
}
/* Just want the 6 most significant bits. */
crc = crc >> 26;
/* Turn on the corresponding bit in the filter. */
switch (crc >> 5) {
case 0:
LER2_ladrf0(ler2, 1 << (crc & 0x1f));
break;
case 1:
LER2_ladrf1(ler2, 1 << (crc & 0x1f));
break;
case 2:
LER2_ladrf2(ler2, 1 << (crc & 0x1f));
break;
case 3:
LER2_ladrf3(ler2, 1 << (crc & 0x1f));
}
ETHER_NEXT_MULTI(step, enm);
}
}
#endif
ledrinit(le)
struct le_softc *le;
{
register volatile void *rp;
register int i;
for (i = 0; i < LERBUF; i++) {
rp = LER2_RMDADDR(le->sc_r2, i);
LER2_rmd0(rp, CPU_TO_CHIP_ADDR(ler2_rbuf[i][0]));
LER2_rmd1(rp, LE_OWN);
LER2_rmd2(rp, -LEMTU);
LER2_rmd3(rp, 0);
}
for (i = 0; i < LETBUF; i++) {
rp = LER2_TMDADDR(le->sc_r2, i);
LER2_tmd0(rp, CPU_TO_CHIP_ADDR(ler2_tbuf[i][0]));
LER2_tmd1(rp, 0);
LER2_tmd2(rp, 0);
LER2_tmd3(rp, 0);
}
}
void
lereset(unit)
register int unit;
{
register struct le_softc *le = &le_softc[unit];
register volatile struct lereg1 *ler1 = le->sc_r1;
register volatile void *ler2 = le->sc_r2;
register int timo = 100000;
register int stat;
#ifdef lint
stat = unit;
#endif
LEWREG(LE_CSR0, ler1->ler1_rap);
LEWREG(LE_STOP, ler1->ler1_rdp);
/*
* Setup for transmit/receive
*/
#if NBPFILTER > 0
if (le->sc_if.if_flags & IFF_PROMISC)
/* set the promiscuous bit */
LER2_mode(ler2, LE_MODE | 0x8000);
else
#endif
LER2_mode(ler2, LE_MODE);
LER2_padr0(ler2, (le->sc_addr[1] << 8) | le->sc_addr[0]);
LER2_padr1(ler2, (le->sc_addr[3] << 8) | le->sc_addr[2]);
LER2_padr2(ler2, (le->sc_addr[5] << 8) | le->sc_addr[4]);
/* Setup the logical address filter */
#ifdef MULTICAST
lesetladrf(le);
#else
LER2_ladrf0(ler2, 0);
LER2_ladrf1(ler2, 0);
LER2_ladrf2(ler2, 0);
LER2_ladrf3(ler2, 0);
#endif
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]));
ledrinit(le);
le->sc_rmd = 0;
le->sc_tmd = LETBUF - 1;
le->sc_tmdnext = 0;
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_INIT, ler1->ler1_rdp);
do {
if (--timo == 0) {
printf("le%d: init timeout, stat = 0x%x\n",
unit, stat);
break;
}
stat = ler1->ler1_rdp;
} while ((stat & LE_IDON) == 0);
LERDWR(ler0, LE_IDON, ler1->ler1_rdp);
LERDWR(ler0, LE_STRT | LE_INEA, ler1->ler1_rdp);
le->sc_if.if_flags &= ~IFF_OACTIVE;
}
/*
* Initialization of interface
*/
void
leinit(unit)
int unit;
{
register struct ifnet *ifp = &le_softc[unit].sc_if;
register struct ifaddr *ifa;
int s;
/* not yet, if address still unknown */
if (ifp->if_addrlist == NULL)
return;
if ((ifp->if_flags & IFF_RUNNING) == 0) {
s = splnet();
ifp->if_flags |= IFF_RUNNING;
lereset(unit);
lestart(ifp);
splx(s);
}
}
#define LENEXTTMP \
if (++bix == LETBUF) \
bix = 0; \
tmd = LER2_TMDADDR(le->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 *le = &le_softc[ifp->if_unit];
register int bix = le->sc_tmdnext;
register volatile void *tmd = LER2_TMDADDR(le->sc_r2, bix);
register struct mbuf *m;
int len = 0;
if ((le->sc_if.if_flags & IFF_RUNNING) == 0)
return;
while (bix != le->sc_tmd) {
if (LER2V_tmd1(tmd) & LE_OWN)
panic("lestart");
IF_DEQUEUE(&le->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(le, LER2_TBUFADDR(le->sc_r2, bix), m);
LER2_tmd3(tmd, 0);
LER2_tmd2(tmd, -len);
LER2_tmd1(tmd, LE_OWN | LE_STP | LE_ENP);
LENEXTTMP;
}
if (len != 0) {
le->sc_if.if_flags |= IFF_OACTIVE;
LERDWR(ler0, LE_TDMD | LE_INEA, le->sc_r1->ler1_rdp);
}
le->sc_tmdnext = bix;
}
/*
* Process interrupts from the 7990 chip.
*/
void
leintr(unit)
int unit;
{
register struct le_softc *le;
register volatile struct lereg1 *ler1;
register int stat;
le = &le_softc[unit];
ler1 = le->sc_r1;
stat = ler1->ler1_rdp;
if (!stat || !(stat & LE_INTR)) {
printf("le%d: spurious interrupt\n", unit);
return;
}
if (stat & LE_SERR) {
leerror(unit, stat);
if (stat & LE_MERR) {
le->sc_merr++;
lereset(unit);
return;
}
if (stat & LE_BABL)
le->sc_babl++;
if (stat & LE_CERR)
le->sc_cerr++;
if (stat & LE_MISS)
le->sc_miss++;
LERDWR(ler0, LE_BABL|LE_CERR|LE_MISS|LE_INEA, ler1->ler1_rdp);
}
if ((stat & LE_RXON) == 0) {
le->sc_rxoff++;
lereset(unit);
return;
}
if ((stat & LE_TXON) == 0) {
le->sc_txoff++;
lereset(unit);
return;
}
if (stat & LE_RINT) {
/* interrupt is cleared in lerint */
lerint(unit);
}
if (stat & LE_TINT) {
LERDWR(ler0, LE_TINT|LE_INEA, ler1->ler1_rdp);
lexint(unit);
}
}
/*
* Ethernet interface transmitter interrupt.
* Start another output if more data to send.
*/
lexint(unit)
register int unit;
{
register struct le_softc *le = &le_softc[unit];
register int bix = le->sc_tmd;
register volatile void *tmd;
if ((le->sc_if.if_flags & IFF_OACTIVE) == 0) {
le->sc_xint++;
return;
}
LENEXTTMP;
while (bix != le->sc_tmdnext && (LER2V_tmd1(tmd) & LE_OWN) == 0) {
le->sc_tmd = bix;
if ((LER2V_tmd1(tmd) & LE_ERR) || (LER2V_tmd3(tmd) & LE_TBUFF)) {
lexerror(unit);
le->sc_if.if_oerrors++;
if (LER2V_tmd3(tmd) & (LE_TBUFF|LE_UFLO)) {
le->sc_uflo++;
lereset(unit);
break;
}
else if (LER2V_tmd3(tmd) & LE_LCOL)
le->sc_if.if_collisions++;
else if (LER2V_tmd3(tmd) & LE_RTRY)
le->sc_if.if_collisions += 16;
}
else if (LER2V_tmd1(tmd) & LE_ONE)
le->sc_if.if_collisions++;
else if (LER2V_tmd1(tmd) & LE_MORE)
/* what is the real number? */
le->sc_if.if_collisions += 2;
else
le->sc_if.if_opackets++;
LENEXTTMP;
}
if (bix == le->sc_tmdnext)
le->sc_if.if_flags &= ~IFF_OACTIVE;
lestart(&le->sc_if);
}
#define LENEXTRMP \
if (++bix == LERBUF) \
bix = 0; \
rmd = LER2_RMDADDR(le->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.
*/
lerint(unit)
int unit;
{
register struct le_softc *le = &le_softc[unit];
register int bix = le->sc_rmd;
register volatile void *rmd = LER2_RMDADDR(le->sc_r2, bix);
/*
* Out of sync with hardware, should never happen?
*/
if (LER2V_rmd1(rmd) & LE_OWN) {
le->sc_rown++;
LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp);
return;
}
/*
* Process all buffers with valid data
*/
while ((LER2V_rmd1(rmd) & LE_OWN) == 0) {
int len = LER2V_rmd3(rmd);
/* Clear interrupt to avoid race condition */
LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp);
if (LER2V_rmd1(rmd) & LE_ERR) {
le->sc_rmd = bix;
lererror(unit, "bad packet");
le->sc_if.if_ierrors++;
} else if ((LER2V_rmd1(rmd) & (LE_STP|LE_ENP)) != (LE_STP|LE_ENP)) {
/*
* Find the end of the packet so we can see how long
* it was. We still throw it away.
*/
do {
LERDWR(le->sc_r0, LE_RINT|LE_INEA,
le->sc_r1->ler1_rdp);
LER2_rmd3(rmd, 0);
LER2_rmd1(rmd, LE_OWN);
LENEXTRMP;
} while (!(LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP)));
le->sc_rmd = bix;
lererror(unit, "chained buffer");
le->sc_rxlen++;
/*
* If search terminated without successful completion
* we reset the hardware (conservative).
*/
if ((LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP)) !=
LE_ENP) {
lereset(unit);
return;
}
} else
leread(unit, LER2_RBUFADDR(le->sc_r2, bix), len);
LER2_rmd3(rmd, 0);
LER2_rmd1(rmd, LE_OWN);
LENEXTRMP;
}
MachEmptyWriteBuffer(); /* Paranoia */
le->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.
*/
leread(unit, buf, len)
int unit;
volatile void *buf;
int len;
{
register struct le_softc *le = &le_softc[unit];
struct ether_header et;
struct mbuf *m;
int off, resid, flags;
u_short sbuf[2], eth_type;
extern struct mbuf *leget();
le->sc_if.if_ipackets++;
(*le->sc_copyfrombuf)(buf, 0, (char *)&et, sizeof (et));
eth_type = ntohs(et.ether_type);
/* adjust input length to account for header and CRC */
len = len - sizeof(struct ether_header) - 4;
if (eth_type >= ETHERTYPE_TRAIL &&
eth_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
off = (eth_type - ETHERTYPE_TRAIL) * 512;
if (off >= ETHERMTU)
return; /* sanity */
(*le->sc_copyfrombuf)(buf, sizeof (et) + off, (char *)sbuf,
sizeof (sbuf));
eth_type = ntohs(sbuf[0]);
resid = ntohs(sbuf[1]);
if (off + resid > len)
return; /* sanity */
len = off + resid;
} else
off = 0;
if (len <= 0) {
if (ledebug)
log(LOG_WARNING,
"le%d: ierror(runt packet): from %s: len=%d\n",
unit, ether_sprintf(et.ether_shost), len);
le->sc_runt++;
le->sc_if.if_ierrors++;
return;
}
flags = 0;
if (bcmp((caddr_t)etherbroadcastaddr,
(caddr_t)et.ether_dhost, sizeof(etherbroadcastaddr)) == 0)
flags |= M_BCAST;
if (et.ether_dhost[0] & 1)
flags |= M_MCAST;
/*
* Pull packet off interface. Off is nonzero if packet
* has trailing header; leget will then force this header
* information to be at the front, but we still have to drop
* the type and length which are at the front of any trailer data.
*/
m = leget(le, buf, len, off, &le->sc_if);
if (m == 0)
return;
#if NBPFILTER > 0
/*
* Check if there's a bpf filter listening on this interface.
* If so, hand off the raw packet to enet.
*/
if (le->sc_if.if_bpf) {
M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT);
if (m == 0)
return;
bcopy(&et, mtod(m, void *), sizeof(struct ether_header));
bpf_mtap(le->sc_if.if_bpf, m);
m_adj(m, sizeof(struct ether_header));
/*
* Keep the packet if it's a broadcast or has our
* physical ethernet address (or if we support
* multicast and it's one).
*/
if (
#ifdef MULTICAST
(flags & (M_BCAST | M_MCAST)) == 0 &&
#else
(flags & M_BCAST) == 0 &&
#endif
bcmp(et.ether_dhost, le->sc_addr,
sizeof(et.ether_dhost)) != 0) {
m_freem(m);
return;
}
}
#endif
m->m_flags |= flags;
ether_input(&le->sc_if, &et, m);
}
/*
* Routine to copy from mbuf chain to transmit buffer in
* network buffer memory.
*/
leput(le, lebuf, m)
struct le_softc *le;
register volatile void *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;
(*le->sc_copytobuf)(mtod(mp, char *), lebuf, boff, len);
tlen += len;
boff += len;
}
m_freem(m);
if (tlen < LEMINSIZE) {
(*le->sc_zerobuf)(lebuf, boff, LEMINSIZE - tlen);
tlen = LEMINSIZE;
}
return(tlen);
}
/*
* Routine to copy from network buffer memory into mbufs.
*/
struct mbuf *
leget(le, lebuf, totlen, off, ifp)
struct le_softc *le;
volatile void *lebuf;
int totlen, off;
struct ifnet *ifp;
{
register struct mbuf *m;
struct mbuf *top = 0, **mp = &top;
register int len, resid, boff;
/* NOTE: sizeof(struct ether_header) should be even */
boff = sizeof(struct ether_header);
if (off) {
/* NOTE: off should be even */
boff += off + 2 * sizeof(u_short);
totlen -= 2 * sizeof(u_short);
resid = totlen - off;
} else
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;
(*le->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.
*/
leioctl(ifp, cmd, data)
register struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
register struct ifaddr *ifa = (struct ifaddr *)data;
struct le_softc *le = &le_softc[ifp->if_unit];
volatile struct lereg1 *ler1 = le->sc_r1;
int s, error = 0;
s = splnet();
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
leinit(ifp->if_unit);
arp_ifinit(&le->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 *)(le->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_STOP, ler1->ler1_rdp);
bcopy((caddr_t)ina->x_host.c_host,
(caddr_t)le->sc_addr, sizeof(le->sc_addr));
}
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 = cons_rtrequest;
error = x25_llcglue(PRC_IFUP, ifa->ifa_addr);
if (error == 0)
leinit(ifp->if_unit);
break;
#endif /* CCITT && LLC */
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
ifp->if_flags & IFF_RUNNING) {
LEWREG(LE_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 ^ le->sc_iflags) & IFF_PROMISC) &&
(ifp->if_flags & IFF_RUNNING)) {
le->sc_iflags = ifp->if_flags;
lereset(ifp->if_unit);
lestart(ifp);
}
break;
#ifdef MULTICAST
case SIOCADDMULTI:
case SIOCDELMULTI:
/* Update our multicast list */
error = (cmd == SIOCADDMULTI) ?
ether_addmulti((struct ifreq *)data, &le->sc_ac) :
ether_delmulti((struct ifreq *)data, &le->sc_ac);
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware
* filter accordingly.
*/
lereset(ifp->if_unit);
error = 0;
}
break;
#endif
default:
error = EINVAL;
}
splx(s);
return (error);
}
leerror(unit, stat)
int unit;
int stat;
{
if (!ledebug)
return;
/*
* Not all transceivers implement heartbeat
* so we only log CERR once.
*/
if ((stat & LE_CERR) && le_softc[unit].sc_cerr)
return;
log(LOG_WARNING,
"le%d: error: stat=%b\n", unit,
stat,
"\20\20ERR\17BABL\16CERR\15MISS\14MERR\13RINT\12TINT\11IDON\10INTR\07INEA\06RXON\05TXON\04TDMD\03STOP\02STRT\01INIT");
}
lererror(unit, msg)
int unit;
char *msg;
{
register struct le_softc *le = &le_softc[unit];
register volatile void *rmd;
u_char eaddr[6];
int len;
if (!ledebug)
return;
rmd = LER2_RMDADDR(le->sc_r2, le->sc_rmd);
len = LER2V_rmd3(rmd);
if (len > 11)
(*le->sc_copyfrombuf)(LER2_RBUFADDR(le->sc_r2, le->sc_rmd),
6, eaddr, 6);
log(LOG_WARNING,
"le%d: ierror(%s): from %s: buf=%d, len=%d, rmd1=%b\n",
unit, msg,
len > 11 ? ether_sprintf(eaddr) : "unknown",
le->sc_rmd, len,
LER2V_rmd1(rmd),
"\20\20OWN\17ERR\16FRAM\15OFLO\14CRC\13RBUF\12STP\11ENP");
}
lexerror(unit)
int unit;
{
register struct le_softc *le = &le_softc[unit];
register volatile void *tmd;
u_char eaddr[6];
int len;
if (!ledebug)
return;
tmd = LER2_TMDADDR(le->sc_r2, 0);
len = -LER2V_tmd2(tmd);
if (len > 5)
(*le->sc_copyfrombuf)(LER2_TBUFADDR(le->sc_r2, 0), 0, eaddr, 6);
log(LOG_WARNING,
"le%d: oerror: to %s: buf=%d, len=%d, tmd1=%b, tmd3=%b\n",
unit,
len > 5 ? ether_sprintf(eaddr) : "unknown",
0, len,
LER2V_tmd1(tmd),
"\20\20OWN\17ERR\16RES\15MORE\14ONE\13DEF\12STP\11ENP",
LER2V_tmd3(tmd),
"\20\20BUFF\17UFLO\16RES\15LCOL\14LCAR\13RTRY");
}
/*
* 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.
*/
static void
lewritereg(regptr, val)
register volatile u_short *regptr;
register u_short val;
{
register int i = 0;
while (*regptr != val) {
*regptr = val;
MachEmptyWriteBuffer();
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;
volatile 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)
volatile 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)
volatile void *lebuf;
int boff;
int len;
{
/*
* Just let bzero() do the work
*/
bzero(((char *)lebuf) + boff, len);
}
/*
* For the pmax the buffer consists of shorts (2 bytes) interspersed with
* short (2 byte) spaces and must be accessed with halfword load/stores.
* (don't worry about doing an extra byte)
*/
void
copytobuf_gap2(from, lebuf, boff, len)
register char *from;
volatile void *lebuf;
int boff;
register int len;
{
register volatile u_short *bptr;
register int xfer;
if (boff & 0x1) {
/* handle unaligned first byte */
bptr = ((volatile u_short *)lebuf) + (boff - 1);
*bptr = (*from++ << 8) | (*bptr & 0xff);
bptr += 2;
len--;
} else
bptr = ((volatile u_short *)lebuf) + boff;
if ((unsigned)from & 0x1) {
while (len > 1) {
*bptr = (from[1] << 8) | (from[0] & 0xff);
bptr += 2;
from += 2;
len -= 2;
}
} else {
/* optimize for aligned transfers */
xfer = (int)((unsigned)len & ~0x1);
CopyToBuffer((u_short *)from, bptr, xfer);
bptr += xfer;
from += xfer;
len -= xfer;
}
if (len == 1)
*bptr = (u_short)*from;
}
void
copyfrombuf_gap2(lebuf, boff, to, len)
volatile void *lebuf;
int boff;
register char *to;
register int len;
{
register volatile u_short *bptr;
register u_short tmp;
register int xfer;
if (boff & 0x1) {
/* handle unaligned first byte */
bptr = ((volatile u_short *)lebuf) + (boff - 1);
*to++ = (*bptr >> 8) & 0xff;
bptr += 2;
len--;
} else
bptr = ((volatile u_short *)lebuf) + boff;
if ((unsigned)to & 0x1) {
while (len > 1) {
tmp = *bptr;
*to++ = tmp & 0xff;
*to++ = (tmp >> 8) & 0xff;
bptr += 2;
len -= 2;
}
} else {
/* optimize for aligned transfers */
xfer = (int)((unsigned)len & ~0x1);
CopyFromBuffer(bptr, to, xfer);
bptr += xfer;
to += xfer;
len -= xfer;
}
if (len == 1)
*to = *bptr & 0xff;
}
void
bzerobuf_gap2(lebuf, boff, len)
volatile void *lebuf;
int boff;
int len;
{
register volatile u_short *bptr;
if ((unsigned)boff & 0x1) {
bptr = ((volatile u_short *)lebuf) + (boff - 1);
*bptr &= 0xff;
bptr += 2;
len--;
} else
bptr = ((volatile u_short *)lebuf) + boff;
while (len > 0) {
*bptr = 0;
bptr += 2;
len -= 2;
}
}
/*
* 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;
volatile 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)
volatile 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)
volatile 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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