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[unix-history] / usr / src / sys / pmax / dev / if_le.c
/*
* Copyright (c) 1992 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* %sccs.include.redist.c%
*
* @(#)if_le.c 7.7 (Berkeley) %G%
*/
#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/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
#ifdef RMP
#include <netrmp/rmp.h>
#include <netrmp/rmp_var.h>
#endif
#include <machine/machConst.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 struct lereg2 *sc_r2; /* dual-port RAM */
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;
#if NBPFILTER > 0
caddr_t sc_bpf;
#endif
} le_softc[NLE];
#ifdef DS3100
/* access LANCE registers */
#define LERDWR(cntl, src, dst) { (dst) = (src); DELAY(10); }
#define CPU_TO_CHIP_ADDR(cpu) \
(((unsigned)(&(((struct lereg2 *)0)->cpu))) >> 1)
#endif
#ifdef DS5000
/* access LANCE registers */
#define LERDWR(cntl, src, dst) (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
#endif
/*
* 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;
extern int leinit(), leioctl(), lestart(), ether_output();
#ifdef DS3100
le->sc_r1 = ler1 = (volatile struct lereg1 *)dp->pmax_addr;
le->sc_r2 = (volatile struct lereg2 *)MACH_NETWORK_BUFFER_ADDR;
/*
* Read the ethernet address.
* See "DECstation 3100 Desktop Workstation Functional Specification".
*/
cp = (u_char *)(MACH_CLOCK_ADDR + 1);
for (i = 0; i < sizeof(le->sc_addr); i++) {
le->sc_addr[i] = *cp;
cp += 4;
}
#endif
#ifdef DS5000
le->sc_r1 = ler1 = (volatile struct lereg1 *)
(dp->pmax_addr + LE_OFFSET_LANCE);
le->sc_r2 = (volatile struct lereg2 *)(dp->pmax_addr + LE_OFFSET_RAM);
/*
* Read the ethernet address.
*/
cp = (u_char *)(dp->pmax_addr + LE_OFFSET_ROM + 2);
for (i = 0; i < sizeof(le->sc_addr); i++) {
le->sc_addr[i] = *cp;
cp += 4;
}
#endif
/* make sure the chip is stopped */
LERDWR(ler0, LE_CSR0, ler1->ler1_rap);
LERDWR(ler0, LE_STOP, ler1->ler1_rdp);
ifp->if_unit = dp->pmax_unit;
ifp->if_name = "le";
ifp->if_mtu = ETHERMTU;
ifp->if_init = leinit;
ifp->if_ioctl = leioctl;
ifp->if_output = ether_output;
ifp->if_start = lestart;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
#if NBPFILTER > 0
bpfattach(&le->sc_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
if_attach(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);
}
ledrinit(ler2)
register volatile struct lereg2 *ler2;
{
register int i;
for (i = 0; i < LERBUF; i++) {
ler2->ler2_rmd[i].rmd0 = CPU_TO_CHIP_ADDR(ler2_rbuf[i][0]);
ler2->ler2_rmd[i].rmd1 = LE_OWN;
ler2->ler2_rmd[i].rmd2 = -LEMTU;
ler2->ler2_rmd[i].rmd3 = 0;
}
for (i = 0; i < LETBUF; i++) {
ler2->ler2_tmd[i].tmd0 = CPU_TO_CHIP_ADDR(ler2_tbuf[i][0]);
ler2->ler2_tmd[i].tmd1 = 0;
ler2->ler2_tmd[i].tmd2 = 0;
ler2->ler2_tmd[i].tmd3 = 0;
}
}
lereset(unit)
register int unit;
{
register struct le_softc *le = &le_softc[unit];
register volatile struct lereg1 *ler1 = le->sc_r1;
register volatile struct lereg2 *ler2 = le->sc_r2;
register int timo = 100000;
register int stat;
#ifdef lint
stat = unit;
#endif
#if NBPFILTER > 0
if (le->sc_if.if_flags & IFF_PROMISC)
/* set the promiscuous bit */
le->sc_r2->ler2_mode = LE_MODE|0x8000;
else
le->sc_r2->ler2_mode = LE_MODE;
#endif
LERDWR(ler0, LE_CSR0, ler1->ler1_rap);
LERDWR(ler0, LE_STOP, ler1->ler1_rdp);
/*
* Setup for transmit/receive
*/
ler2->ler2_mode = LE_MODE;
ler2->ler2_padr0 = (le->sc_addr[1] << 8) | le->sc_addr[0];
ler2->ler2_padr1 = (le->sc_addr[3] << 8) | le->sc_addr[2];
ler2->ler2_padr2 = (le->sc_addr[5] << 8) | le->sc_addr[4];
#ifdef RMP
/*
* Set up logical addr filter to accept multicast 9:0:9:0:0:4
* This should be an ioctl() to the driver. (XXX)
*/
ler2->ler2_ladrf0 = 0x0010;
ler2->ler2_ladrf1 = 0x0;
ler2->ler2_ladrf2 = 0x0;
ler2->ler2_ladrf3 = 0x0;
#else
ler2->ler2_ladrf0 = 0;
ler2->ler2_ladrf1 = 0;
ler2->ler2_ladrf2 = 0;
ler2->ler2_ladrf3 = 0;
#endif
ler2->ler2_rlen = LE_RLEN;
ler2->ler2_rdra = CPU_TO_CHIP_ADDR(ler2_rmd[0]);
ler2->ler2_tlen = LE_TLEN;
ler2->ler2_tdra = CPU_TO_CHIP_ADDR(ler2_tmd[0]);
ledrinit(ler2);
le->sc_rmd = 0;
le->sc_tmd = LETBUF - 1;
le->sc_tmdnext = 0;
LERDWR(ler0, LE_CSR1, ler1->ler1_rap);
LERDWR(ler0, CPU_TO_CHIP_ADDR(ler2_mode), ler1->ler1_rdp);
LERDWR(ler0, LE_CSR2, ler1->ler1_rap);
LERDWR(ler0, 0, ler1->ler1_rdp);
LERDWR(ler0, LE_CSR3, ler1->ler1_rap);
LERDWR(ler0, 0, ler1->ler1_rdp);
LERDWR(ler0, LE_CSR0, ler1->ler1_rap);
LERDWR(ler0, LE_INIT, ler1->ler1_rdp);
MachEmptyWriteBuffer();
do {
if (--timo == 0) {
printf("le%d: init timeout, stat = 0x%x\n",
unit, stat);
break;
}
LERDWR(ler0, ler1->ler1_rdp, stat);
} while ((stat & LE_IDON) == 0);
LERDWR(ler0, LE_IDON, ler1->ler1_rdp);
LERDWR(ler0, LE_STRT | LE_INEA, ler1->ler1_rdp);
MachEmptyWriteBuffer();
le->sc_if.if_flags &= ~IFF_OACTIVE;
}
/*
* Initialization of interface
*/
leinit(unit)
int unit;
{
struct le_softc *le = &le_softc[unit];
register struct ifnet *ifp = &le->sc_if;
int s;
/* not yet, if address still unknown */
if (ifp->if_addrlist == (struct ifaddr *)0)
return;
if ((ifp->if_flags & IFF_RUNNING) == 0) {
s = splnet();
ifp->if_flags |= IFF_RUNNING;
lereset(unit);
(void) lestart(ifp);
splx(s);
}
}
#define LENEXTTMP \
if (++bix == LETBUF) bix = 0, tmd = le->sc_r2->ler2_tmd; else ++tmd
/*
* Start output on interface. Get another datagram to send
* off of the interface queue, and copy it to the interface
* before starting the output.
*/
lestart(ifp)
struct ifnet *ifp;
{
register struct le_softc *le = &le_softc[ifp->if_unit];
register int bix = le->sc_tmdnext;
register volatile struct letmd *tmd = &le->sc_r2->ler2_tmd[bix];
register struct mbuf *m;
int len = 0;
if ((le->sc_if.if_flags & IFF_RUNNING) == 0)
return (0);
while (bix != le->sc_tmd) {
if (tmd->tmd1 & LE_OWN)
panic("lestart");
IF_DEQUEUE(&le->sc_if.if_snd, m);
if (m == 0)
break;
len = leput(le->sc_r2->ler2_tbuf[bix], m);
#if NBPFILTER > 0
/*
* If bpf is listening on this interface, let it
* see the packet before we commit it to the wire.
*/
if (le->sc_bpf)
bpf_tap(le->sc_bpf, le->sc_r2->ler2_tbuf[bix], len);
#endif
tmd->tmd3 = 0;
tmd->tmd2 = -len;
tmd->tmd1 = 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);
MachEmptyWriteBuffer();
}
le->sc_tmdnext = bix;
return (0);
}
/*
* 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 & LE_INTR)) {
printf("le%d: spurrious 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);
MachEmptyWriteBuffer();
}
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);
MachEmptyWriteBuffer();
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 struct letmd *tmd = &le->sc_r2->ler2_tmd[bix];
if ((le->sc_if.if_flags & IFF_OACTIVE) == 0) {
le->sc_xint++;
return;
}
LENEXTTMP;
while (bix != le->sc_tmdnext && (tmd->tmd1 & LE_OWN) == 0) {
le->sc_tmd = bix;
if ((tmd->tmd1 & LE_ERR) || (tmd->tmd3 & LE_TBUFF)) {
lexerror(unit);
le->sc_if.if_oerrors++;
if (tmd->tmd3 & (LE_TBUFF|LE_UFLO)) {
le->sc_uflo++;
lereset(unit);
break;
}
else if (tmd->tmd3 & LE_LCOL)
le->sc_if.if_collisions++;
else if (tmd->tmd3 & LE_RTRY)
le->sc_if.if_collisions += 16;
}
else if (tmd->tmd1 & LE_ONE)
le->sc_if.if_collisions++;
else if (tmd->tmd1 & 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;
(void) lestart(&le->sc_if);
}
#define LENEXTRMP \
if (++bix == LERBUF) bix = 0, rmd = le->sc_r2->ler2_rmd; else ++rmd
/*
* 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 struct lermd *rmd = &le->sc_r2->ler2_rmd[bix];
/*
* Out of sync with hardware, should never happen?
*/
if (rmd->rmd1 & LE_OWN) {
LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp);
MachEmptyWriteBuffer();
return;
}
/*
* Process all buffers with valid data
*/
while ((rmd->rmd1 & LE_OWN) == 0) {
int len = rmd->rmd3;
/* Clear interrupt to avoid race condition */
LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp);
MachEmptyWriteBuffer();
if (rmd->rmd1 & LE_ERR) {
le->sc_rmd = bix;
lererror(unit, "bad packet");
le->sc_if.if_ierrors++;
} else if ((rmd->rmd1 & (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);
MachEmptyWriteBuffer();
rmd->rmd3 = 0;
rmd->rmd1 = LE_OWN;
LENEXTRMP;
} while (!(rmd->rmd1 & (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 ((rmd->rmd1 & (LE_OWN|LE_ERR|LE_STP|LE_ENP)) !=
LE_ENP) {
lereset(unit);
return;
}
} else
leread(unit, le->sc_r2->ler2_rbuf[bix], len);
rmd->rmd3 = 0;
rmd->rmd1 = 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;
le_buf_t *buf;
int len;
{
register struct le_softc *le = &le_softc[unit];
struct ether_header et;
struct mbuf *m;
int off, resid;
#ifdef DS3100
u_short sbuf[2];
#endif
extern struct mbuf *leget();
le->sc_if.if_ipackets++;
#ifdef DS3100
CopyFromBuffer(buf, (char *)&et, sizeof(et));
#endif
#ifdef DS5000
bcopy(buf, (char *)&et, sizeof(et));
#endif
et.ether_type = ntohs(et.ether_type);
/* adjust input length to account for header and CRC */
len = len - sizeof(struct ether_header) - 4;
#ifdef RMP
/* (XXX)
*
* If Ethernet Type field is < MaxPacketSize, we probably have
* a IEEE802 packet here. Make sure that the size is at least
* that of the HP LLC. Also do sanity checks on length of LLC
* (old Ethernet Type field) and packet length.
*
* Provided the above checks succeed, change `len' to reflect
* the length of the LLC (i.e. et.ether_type) and change the
* type field to ETHERTYPE_IEEE so we can switch() on it later.
* Yes, this is a hack and will eventually be done "right".
*/
if (et.ether_type <= IEEE802LEN_MAX && len >= sizeof(struct hp_llc) &&
len >= et.ether_type && len >= IEEE802LEN_MIN) {
len = et.ether_type;
et.ether_type = ETHERTYPE_IEEE; /* hack! */
}
#endif
if (et.ether_type >= ETHERTYPE_TRAIL &&
et.ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
off = (et.ether_type - ETHERTYPE_TRAIL) * 512;
if (off >= ETHERMTU)
return; /* sanity */
#ifdef DS3100
CopyFromBuffer(buf + (sizeof(et) + off),
(char *)sbuf, sizeof(sbuf));
et.ether_type = ntohs(sbuf[0]);
resid = ntohs(sbuf[1]);
#endif
#ifdef DS5000
et.ether_type = ntohs(((u_short *)(buf + (sizeof(et) + off)))[0]);
resid = ntohs(((u_short *)(buf + (sizeof(et) + off)))[1]);
#endif
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;
}
#if NBPFILTER > 0
/*
* Check if there's a bpf filter listening on this interface.
* If so, hand off the raw packet to bpf, which must deal with
* trailers in its own way.
*/
if (le->sc_bpf) {
bpf_tap(le->sc_bpf, buf, len + 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.
*
* XXX This test does not support multicasts.
*/
if ((le->sc_if.if_flags & IFF_PROMISC)
&& bcmp(et.ether_dhost, le->sc_addr,
sizeof(et.ether_dhost)) != 0
&& bcmp(et.ether_dhost, etherbroadcastaddr,
sizeof(et.ether_dhost)) != 0)
return;
}
#endif
/*
* 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(buf, len, off, &le->sc_if);
if (m == 0)
return;
#ifdef RMP
/*
* (XXX)
* This needs to be integrated with the ISO stuff in ether_input()
*/
if (et.ether_type == ETHERTYPE_IEEE) {
/*
* Snag the Logical Link Control header (IEEE 802.2).
*/
struct hp_llc *llc = &(mtod(m, struct rmp_packet *)->hp_llc);
/*
* If the DSAP (and HP's extended DXSAP) indicate this
* is an RMP packet, hand it to the raw input routine.
*/
if (llc->dsap == IEEE_DSAP_HP && llc->dxsap == HPEXT_DXSAP) {
static struct sockproto rmp_sp = {AF_RMP,RMPPROTO_BOOT};
static struct sockaddr rmp_src = {AF_RMP};
static struct sockaddr rmp_dst = {AF_RMP};
bcopy(et.ether_shost, rmp_src.sa_data,
sizeof(et.ether_shost));
bcopy(et.ether_dhost, rmp_dst.sa_data,
sizeof(et.ether_dhost));
raw_input(m, &rmp_sp, &rmp_src, &rmp_dst);
return;
}
}
#endif
ether_input(&le->sc_if, &et, m);
}
/*
* Routine to copy from mbuf chain to transmit buffer in
* network buffer memory.
* NOTE: On the DS3100, network memory can only be written one short at
* every other address.
*/
leput(lebuf, m)
register le_buf_t *lebuf;
register struct mbuf *m;
{
register struct mbuf *mp;
register int len, tlen = 0;
#ifdef DS3100
register char *cp;
int tmp, xfer;
#endif
for (mp = m; mp; mp = mp->m_next) {
len = mp->m_len;
if (len == 0)
continue;
#ifdef DS3100
/* copy data for this mbuf */
cp = mtod(mp, char *);
if (tlen & 1) {
/* handle odd length from previous mbuf */
*lebuf = (cp[0] << 8) | tmp;
lebuf += 2;
cp++;
len--;
tlen++;
}
tlen += len;
if ((unsigned)cp & 1) {
while (len > 1) {
*lebuf = (cp[1] << 8) | cp[0];
lebuf += 2;
cp += 2;
len -= 2;
}
} else {
/* optimize for aligned transfers */
xfer = (int)((unsigned)len & ~0x1);
CopyToBuffer((u_short *)cp, lebuf, xfer);
lebuf += xfer;
cp += xfer;
len -= xfer;
}
if (len == 1)
tmp = *cp;
#endif
#ifdef DS5000
tlen += len;
bcopy(mtod(mp, char *), lebuf, len);
lebuf += len;
#endif
}
m_freem(m);
#ifdef DS3100
/* handle odd length from previous mbuf */
if (tlen & 1)
*lebuf = tmp;
#endif
if (tlen < LEMINSIZE) {
#ifdef DS3100
tlen = (tlen + 1) & ~1;
while (tlen < LEMINSIZE) {
*lebuf++ = 0;
tlen += 2;
}
#endif
#ifdef DS5000
bzero(lebuf, LEMINSIZE - tlen);
#endif
tlen = LEMINSIZE;
}
return(tlen);
}
/*
* Routine to copy from network buffer memory into mbufs.
* NOTE: On the DS3100, network memory can only be written one short at
* every other address.
*/
struct mbuf *
leget(lebuf, totlen, off, ifp)
le_buf_t *lebuf;
int totlen, off;
struct ifnet *ifp;
{
register struct mbuf *m;
struct mbuf *top = 0, **mp = &top;
register int len, resid;
register le_buf_t *sp;
/* NOTE: sizeof(struct ether_header) should be even */
lebuf += sizeof(struct ether_header);
sp = lebuf;
if (off) {
/* NOTE: off should be even */
sp += 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;
#ifdef DS3100
if ((unsigned)sp & 2) {
/*
* Previous len was odd. Copy the single byte specially.
* XXX Can this ever happen??
*/
panic("le odd rcv");
*mtod(m, char *) = ((volatile char *)sp)[-1];
CopyFromBuffer(sp + 1, mtod(m, char *) + 1, len - 1);
} else
CopyFromBuffer(sp, mtod(m, char *), len);
#endif
#ifdef DS5000
bcopy(sp, mtod(m, char *), len);
#endif
sp += len;
*mp = m;
mp = &m->m_next;
totlen -= len;
resid -= len;
if (resid == 0) {
sp = lebuf;
resid = totlen;
}
}
return (top);
}
/*
* Process an ioctl request.
*/
leioctl(ifp, cmd, data)
register struct ifnet *ifp;
int 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); /* before arpwhohas */
((struct arpcom *)ifp)->ac_ipaddr =
IA_SIN(ifa)->sin_addr;
arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
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;
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;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
ifp->if_flags & IFF_RUNNING) {
LERDWR(le->sc_r0, LE_STOP, ler1->ler1_rdp);
MachEmptyWriteBuffer();
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;
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 struct lermd *rmd;
u_char eaddr[6];
char *cp;
int len;
if (!ledebug)
return;
rmd = &le->sc_r2->ler2_rmd[le->sc_rmd];
len = rmd->rmd3;
if (len > 11) {
#ifdef DS3100
CopyFromBuffer((char *)&le->sc_r2->ler2_rbuf[le->sc_rmd][6],
eaddr, sizeof(eaddr));
#endif
#ifdef DS5000
bcopy((char *)&le->sc_r2->ler2_rbuf[le->sc_rmd][6],
eaddr, sizeof(eaddr));
#endif
cp = ether_sprintf(eaddr);
} else
cp = "unknown";
log(LOG_WARNING,
"le%d: ierror(%s): from %s: buf=%d, len=%d, rmd1=%b\n",
unit, msg, cp, le->sc_rmd, len,
rmd->rmd1,
"\20\20OWN\17ERR\16FRAM\15OFLO\14CRC\13RBUF\12STP\11ENP");
}
lexerror(unit)
int unit;
{
register struct le_softc *le = &le_softc[unit];
register volatile struct letmd *tmd;
u_char eaddr[6];
char *cp;
int len;
if (!ledebug)
return;
tmd = le->sc_r2->ler2_tmd;
len = -tmd->tmd2;
if (len > 5) {
#ifdef DS3100
CopyFromBuffer((char *)&le->sc_r2->ler2_tbuf[le->sc_tmd][0],
eaddr, sizeof(eaddr));
#endif
#ifdef DS5000
bcopy((char *)&le->sc_r2->ler2_tbuf[le->sc_tmd][0],
eaddr, sizeof(eaddr));
#endif
cp = ether_sprintf(eaddr);
} else
cp = "unknown";
log(LOG_WARNING,
"le%d: oerror: to %s: buf=%d, len=%d, tmd1=%b, tmd3=%b\n",
unit, cp, le->sc_tmd, len,
tmd->tmd1,
"\20\20OWN\17ERR\16RES\15MORE\14ONE\13DEF\12STP\11ENP",
tmd->tmd3,
"\20\20BUFF\17UFLO\16RES\15LCOL\14LCAR\13RTRY");
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.