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freebsd-dev/sys/alpha/tc/am7990.c
Doug Rabson 19df33b637 Add support for TurboChannel alphas (DEC 3000/300 and 3000/500). 
Obtained from: NetBSD
Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
1998-08-20 08:27:11 +00:00

1474 lines
34 KiB
C
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/* $Id$ */
/* $NetBSD: am7990.c,v 1.43 1998/03/29 22:36:42 mycroft Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*-
* Copyright (c) 1995 Charles M. Hannum. All rights reserved.
* 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 "opt_inet.h"
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <net/netisr.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#endif
#include <net/ethernet.h>
#include <net/if_arp.h>
#include <machine/clock.h>
#include <alpha/tc/am7990reg.h>
#include <alpha/tc/am7990var.h>
#ifdef LEDEBUG
void am7990_recv_print __P((struct am7990_softc *, int));
void am7990_xmit_print __P((struct am7990_softc *, int));
#endif
integrate void am7990_rint __P((struct am7990_softc *));
integrate void am7990_tint __P((struct am7990_softc *));
integrate int am7990_put __P((struct am7990_softc *, int, struct mbuf *));
integrate struct mbuf *am7990_get __P((struct am7990_softc *, int, int));
integrate void am7990_read __P((struct am7990_softc *, int, int));
hide void am7990_shutdown __P((void *));
int am7990_mediachange __P((struct ifnet *));
void am7990_mediastatus __P((struct ifnet *, struct ifmediareq *));
#define ifp (&sc->sc_ethercom.ac_if)
static __inline u_int16_t ether_cmp __P((void *, void *));
char * ether_sprintf(u_char *ap);
/*
* Compare two Ether/802 addresses for equality, inlined and
* unrolled for speed. Use this like bcmp().
*
* XXX: Add <machine/inlines.h> for stuff like this?
* XXX: or maybe add it to libkern.h instead?
*
* "I'd love to have an inline assembler version of this."
* XXX: Who wanted that? mycroft? I wrote one, but this
* version in C is as good as hand-coded assembly. -gwr
*
* Please do NOT tweak this without looking at the actual
* assembly code generated before and after your tweaks!
*/
static __inline u_int16_t
ether_cmp(one, two)
void *one, *two;
{
register u_int16_t *a = (u_short *) one;
register u_int16_t *b = (u_short *) two;
register u_int16_t diff;
#ifdef m68k
/*
* The post-increment-pointer form produces the best
* machine code for m68k. This was carefully tuned
* so it compiles to just 8 short (2-byte) op-codes!
*/
diff = *a++ - *b++;
diff |= *a++ - *b++;
diff |= *a++ - *b++;
#else
/*
* Most modern CPUs do better with a single expresion.
* Note that short-cut evaluation is NOT helpful here,
* because it just makes the code longer, not faster!
*/
diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]);
#endif
return (diff);
}
#define ETHER_CMP ether_cmp
#ifdef LANCE_REVC_BUG
/* Make sure this is short-aligned, for ether_cmp(). */
static u_int16_t bcast_enaddr[3] = { ~0, ~0, ~0 };
#endif
void
am7990_config(sc)
struct am7990_softc *sc;
{
int mem, i;
/* Make sure the chip is stopped. */
am7990_stop(sc);
/* Initialize ifnet structure. */
sprintf(sc->sc_dev.dv_xname, "le%d", sc->unit);
ifp->if_unit = sc->unit;
ifp->if_name = "le";
ifp->if_softc = sc;
ifp->if_start = am7990_start;
ifp->if_ioctl = am7990_ioctl;
ifp->if_output = ether_output;
ifp->if_watchdog = am7990_watchdog;
ifp->if_flags =
IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
#ifdef LANCE_REVC_BUG
ifp->if_flags &= ~IFF_MULTICAST;
#endif
/* Initialize ifmedia structures. */
ifmedia_init(&sc->sc_media, 0, am7990_mediachange, am7990_mediastatus);
if (sc->sc_supmedia != NULL) {
for (i = 0; i < sc->sc_nsupmedia; i++)
ifmedia_add(&sc->sc_media, sc->sc_supmedia[i],
0, NULL);
ifmedia_set(&sc->sc_media, sc->sc_defaultmedia);
} else {
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL);
ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL);
}
/* Attach the interface. */
bcopy(sc->sc_enaddr,((struct arpcom *)ifp)->ac_enaddr, 6);
printf("%s: address %s\n", sc->sc_dev.dv_xname,
ether_sprintf(sc->sc_enaddr));
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
switch (sc->sc_memsize) {
case 8192:
sc->sc_nrbuf = 4;
sc->sc_ntbuf = 1;
break;
case 16384:
sc->sc_nrbuf = 8;
sc->sc_ntbuf = 2;
break;
case 32768:
sc->sc_nrbuf = 16;
sc->sc_ntbuf = 4;
break;
case 65536:
sc->sc_nrbuf = 32;
sc->sc_ntbuf = 8;
break;
case 131072:
sc->sc_nrbuf = 64;
sc->sc_ntbuf = 16;
break;
default:
panic("am7990_config: weird memory size");
}
printf("%s: %d receive buffers, %d transmit buffers\n",
sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf);
/*
sc->sc_sh = shutdownhook_establish(am7990_shutdown, sc);
if (sc->sc_sh == NULL)
panic("am7990_config: can't establish shutdownhook");
*/
sc->sc_rbufaddr = malloc(sc->sc_nrbuf * sizeof(int), M_DEVBUF,
M_WAITOK);
sc->sc_tbufaddr = malloc(sc->sc_ntbuf * sizeof(int), M_DEVBUF,
M_WAITOK);
mem = 0;
sc->sc_initaddr = mem;
mem += sizeof(struct leinit);
sc->sc_rmdaddr = mem;
mem += sizeof(struct lermd) * sc->sc_nrbuf;
sc->sc_tmdaddr = mem;
mem += sizeof(struct letmd) * sc->sc_ntbuf;
for (i = 0; i < sc->sc_nrbuf; i++, mem += LEBLEN)
sc->sc_rbufaddr[i] = mem;
for (i = 0; i < sc->sc_ntbuf; i++, mem += LEBLEN)
sc->sc_tbufaddr[i] = mem;
#ifdef notyet
if (mem > ...)
panic(...);
#endif
#if NRND > 0
rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname,
RND_TYPE_NET);
#endif
}
void
am7990_reset(sc)
struct am7990_softc *sc;
{
int s;
s = splimp();
am7990_init(sc);
splx(s);
}
/*
* Set up the initialization block and the descriptor rings.
*/
void
am7990_meminit(sc)
register struct am7990_softc *sc;
{
u_long a;
int bix;
struct leinit init;
struct lermd rmd;
struct letmd tmd;
u_int8_t *myaddr;
#if NBPFILTER > 0
if (ifp->if_flags & IFF_PROMISC)
init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
else
#endif
init.init_mode = LE_MODE_NORMAL;
if (sc->sc_initmodemedia == 1)
init.init_mode |= LE_MODE_PSEL0;
/*
* Update our private copy of the Ethernet address.
* We NEED the copy so we can ensure its alignment!
*/
bcopy(((struct arpcom *)ifp)->ac_enaddr, sc->sc_enaddr, 6);
myaddr = sc->sc_enaddr;
init.init_padr[0] = (myaddr[1] << 8) | myaddr[0];
init.init_padr[1] = (myaddr[3] << 8) | myaddr[2];
init.init_padr[2] = (myaddr[5] << 8) | myaddr[4];
am7990_setladrf(&sc->sc_ethercom, init.init_ladrf);
sc->sc_last_rd = 0;
sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
a = sc->sc_addr + LE_RMDADDR(sc, 0);
init.init_rdra = a;
init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
a = sc->sc_addr + LE_TMDADDR(sc, 0);
init.init_tdra = a;
init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
/*
* Set up receive ring descriptors.
*/
for (bix = 0; bix < sc->sc_nrbuf; bix++) {
a = sc->sc_addr + LE_RBUFADDR(sc, bix);
rmd.rmd0 = a;
rmd.rmd1_hadr = a >> 16;
rmd.rmd1_bits = LE_R1_OWN;
rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
rmd.rmd3 = 0;
(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
sizeof(rmd));
}
/*
* Set up transmit ring descriptors.
*/
for (bix = 0; bix < sc->sc_ntbuf; bix++) {
a = sc->sc_addr + LE_TBUFADDR(sc, bix);
tmd.tmd0 = a;
tmd.tmd1_hadr = a >> 16;
tmd.tmd1_bits = 0;
tmd.tmd2 = 0 | LE_XMD2_ONES;
tmd.tmd3 = 0;
(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
sizeof(tmd));
}
}
void
am7990_stop(sc)
struct am7990_softc *sc;
{
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
}
/*
* Initialization of interface; set up initialization block
* and transmit/receive descriptor rings.
*/
void
am7990_init(sc)
register struct am7990_softc *sc;
{
register int timo;
u_long a;
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
DELAY(100);
/* Newer LANCE chips have a reset register */
if (sc->sc_hwreset)
(*sc->sc_hwreset)(sc);
/* Set the correct byte swapping mode, etc. */
(*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3);
/* Set up LANCE init block. */
am7990_meminit(sc);
/* Give LANCE the physical address of its init block. */
a = sc->sc_addr + LE_INITADDR(sc);
(*sc->sc_wrcsr)(sc, LE_CSR1, a);
(*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16);
/* Try to initialize the LANCE. */
DELAY(100);
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT);
/* Wait for initialization to finish. */
for (timo = 100000; timo; timo--)
if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON)
break;
if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) {
/* Start the LANCE. */
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT |
LE_C0_IDON);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
am7990_start(ifp);
} else
printf("%s: card failed to initialize\n", sc->sc_dev.dv_xname);
if (sc->sc_hwinit)
(*sc->sc_hwinit)(sc);
}
/*
* Routine to copy from mbuf chain to transmit buffer in
* network buffer memory.
*/
integrate int
am7990_put(sc, boff, m)
struct am7990_softc *sc;
int boff;
register struct mbuf *m;
{
register struct mbuf *n;
register int len, tlen = 0;
for (; m; m = n) {
len = m->m_len;
if (len == 0) {
MFREE(m, n);
continue;
}
(*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len);
boff += len;
tlen += len;
MFREE(m, n);
}
if (tlen < LEMINSIZE) {
(*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen);
tlen = LEMINSIZE;
}
return (tlen);
}
/*
* Pull data off an interface.
* Len is length of data, with local net header stripped.
* We copy the data into mbufs. When full cluster sized units are present
* we copy into clusters.
*/
integrate struct mbuf *
am7990_get(sc, boff, totlen)
struct am7990_softc *sc;
int boff, totlen;
{
register struct mbuf *m;
struct mbuf *top, **mp;
int len;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = totlen;
len = MHLEN;
top = 0;
mp = &top;
while (totlen > 0) {
if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
m_freem(top);
return 0;
}
len = MLEN;
}
if (totlen >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_free(m);
m_freem(top);
return 0;
}
len = MCLBYTES;
}
if (!top) {
register int pad =
ALIGN(sizeof(struct ether_header)) -
sizeof(struct ether_header);
m->m_data += pad;
len -= pad;
}
m->m_len = len = min(totlen, len);
(*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len);
boff += len;
totlen -= len;
*mp = m;
mp = &m->m_next;
}
return (top);
}
/*
* Pass a packet to the higher levels.
*/
integrate void
am7990_read(sc, boff, len)
register struct am7990_softc *sc;
int boff, len;
{
struct mbuf *m;
struct ether_header *eh;
if (len <= sizeof(struct ether_header) ||
len > ETHERMTU + sizeof(struct ether_header)) {
#ifdef LEDEBUG
printf("%s: invalid packet size %d; dropping\n",
sc->sc_dev.dv_xname, len);
#endif
ifp->if_ierrors++;
return;
}
/* Pull packet off interface. */
m = am7990_get(sc, boff, len);
if (m == 0) {
ifp->if_ierrors++;
return;
}
ifp->if_ipackets++;
/* We assume that the header fit entirely in one mbuf. */
eh = mtod(m, struct ether_header *);
#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) {
bpf_mtap(ifp->if_bpf, m);
#ifndef LANCE_REVC_BUG
/*
* 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) != 0 &&
(eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */
ETHER_CMP(eh->ether_dhost, sc->sc_enaddr)) {
m_freem(m);
return;
}
#endif
}
#endif
#ifdef LANCE_REVC_BUG
/*
* The old LANCE (Rev. C) chips have a bug which causes
* garbage to be inserted in front of the received packet.
* The work-around is to ignore packets with an invalid
* destination address (garbage will usually not match).
* Of course, this precludes multicast support...
*/
if (ETHER_CMP(eh->ether_dhost, sc->sc_enaddr) &&
ETHER_CMP(eh->ether_dhost, bcast_enaddr)) {
m_freem(m);
return;
}
#endif
/* Pass the packet up, with the ether header sort-of removed. */
m_adj(m, sizeof(struct ether_header));
ether_input(ifp, eh, m);
}
integrate void
am7990_rint(sc)
struct am7990_softc *sc;
{
register int bix;
int rp;
struct lermd rmd;
bix = sc->sc_last_rd;
/* Process all buffers with valid data. */
for (;;) {
rp = LE_RMDADDR(sc, bix);
(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
if (rmd.rmd1_bits & LE_R1_OWN)
break;
if (rmd.rmd1_bits & LE_R1_ERR) {
if (rmd.rmd1_bits & LE_R1_ENP) {
#ifdef LEDEBUG
if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
if (rmd.rmd1_bits & LE_R1_FRAM)
printf("%s: framing error\n",
sc->sc_dev.dv_xname);
if (rmd.rmd1_bits & LE_R1_CRC)
printf("%s: crc mismatch\n",
sc->sc_dev.dv_xname);
}
#endif
} else {
if (rmd.rmd1_bits & LE_R1_OFLO)
printf("%s: overflow\n",
sc->sc_dev.dv_xname);
}
if (rmd.rmd1_bits & LE_R1_BUFF)
printf("%s: receive buffer error\n",
sc->sc_dev.dv_xname);
ifp->if_ierrors++;
} else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
(LE_R1_STP | LE_R1_ENP)) {
printf("%s: dropping chained buffer\n",
sc->sc_dev.dv_xname);
ifp->if_ierrors++;
} else {
#ifdef LEDEBUG
if (sc->sc_debug)
am7990_recv_print(sc, sc->sc_last_rd);
#endif
am7990_read(sc, LE_RBUFADDR(sc, bix),
(int)rmd.rmd3 - 4);
}
rmd.rmd1_bits = LE_R1_OWN;
rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
rmd.rmd3 = 0;
(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
#ifdef LEDEBUG
if (sc->sc_debug)
printf("sc->sc_last_rd = %x, rmd: "
"ladr %04x, hadr %02x, flags %02x, "
"bcnt %04x, mcnt %04x\n",
sc->sc_last_rd,
rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits,
rmd.rmd2, rmd.rmd3);
#endif
if (++bix == sc->sc_nrbuf)
bix = 0;
}
sc->sc_last_rd = bix;
}
integrate void
am7990_tint(sc)
register struct am7990_softc *sc;
{
register int bix;
struct letmd tmd;
bix = sc->sc_first_td;
for (;;) {
if (sc->sc_no_td <= 0)
break;
#ifdef LEDEBUG
if (sc->sc_debug)
printf("trans tmd: "
"ladr %04x, hadr %02x, flags %02x, "
"bcnt %04x, mcnt %04x\n",
tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
tmd.tmd2, tmd.tmd3);
#endif
(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
sizeof(tmd));
if (tmd.tmd1_bits & LE_T1_OWN)
break;
ifp->if_flags &= ~IFF_OACTIVE;
if (tmd.tmd1_bits & LE_T1_ERR) {
if (tmd.tmd3 & LE_T3_BUFF)
printf("%s: transmit buffer error\n",
sc->sc_dev.dv_xname);
else if (tmd.tmd3 & LE_T3_UFLO)
printf("%s: underflow\n", sc->sc_dev.dv_xname);
if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
am7990_reset(sc);
return;
}
if (tmd.tmd3 & LE_T3_LCAR) {
sc->sc_havecarrier = 0;
if (sc->sc_nocarrier)
(*sc->sc_nocarrier)(sc);
else
printf("%s: lost carrier\n",
sc->sc_dev.dv_xname);
}
if (tmd.tmd3 & LE_T3_LCOL)
ifp->if_collisions++;
if (tmd.tmd3 & LE_T3_RTRY) {
printf("%s: excessive collisions, tdr %d\n",
sc->sc_dev.dv_xname,
tmd.tmd3 & LE_T3_TDR_MASK);
ifp->if_collisions += 16;
}
ifp->if_oerrors++;
} else {
if (tmd.tmd1_bits & LE_T1_ONE)
ifp->if_collisions++;
else if (tmd.tmd1_bits & LE_T1_MORE)
/* Real number is unknown. */
ifp->if_collisions += 2;
ifp->if_opackets++;
}
if (++bix == sc->sc_ntbuf)
bix = 0;
--sc->sc_no_td;
}
sc->sc_first_td = bix;
am7990_start(ifp);
if (sc->sc_no_td == 0)
ifp->if_timer = 0;
}
/*
* Controller interrupt.
*/
void
am7990_intr(arg)
register void *arg;
{
register struct am7990_softc *sc = arg;
register u_int16_t isr;
isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
sc->sc_saved_csr0 = 0;
#ifdef LEDEBUG
if (sc->sc_debug)
printf("%s: am7990_intr entering with isr=%04x\n",
sc->sc_dev.dv_xname, isr);
#endif
if ((isr & LE_C0_INTR) == 0)
return;
(*sc->sc_wrcsr)(sc, LE_CSR0,
isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
if (isr & LE_C0_ERR) {
if (isr & LE_C0_BABL) {
#ifdef LEDEBUG
printf("%s: babble\n", sc->sc_dev.dv_xname);
#endif
ifp->if_oerrors++;
}
#if 0
if (isr & LE_C0_CERR) {
printf("%s: collision error\n", sc->sc_dev.dv_xname);
ifp->if_collisions++;
}
#endif
if (isr & LE_C0_MISS) {
#ifdef LEDEBUG
printf("%s: missed packet\n", sc->sc_dev.dv_xname);
#endif
ifp->if_ierrors++;
}
if (isr & LE_C0_MERR) {
printf("%s: memory error\n", sc->sc_dev.dv_xname);
am7990_reset(sc);
return;
}
}
if ((isr & LE_C0_RXON) == 0) {
printf("%s: receiver disabled\n", sc->sc_dev.dv_xname);
ifp->if_ierrors++;
am7990_reset(sc);
return;
}
if ((isr & LE_C0_TXON) == 0) {
printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname);
ifp->if_oerrors++;
am7990_reset(sc);
return;
}
/*
* Pretend we have carrier; if we don't this will be cleared
* shortly.
*/
sc->sc_havecarrier = 1;
if (isr & LE_C0_RINT)
am7990_rint(sc);
if (isr & LE_C0_TINT)
am7990_tint(sc);
#if NRND > 0
rnd_add_uint32(&sc->rnd_source, isr);
#endif
return;
}
#undef ifp
void
am7990_watchdog(ifp)
struct ifnet *ifp;
{
struct am7990_softc *sc = ifp->if_softc;
log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname);
++ifp->if_oerrors;
am7990_reset(sc);
}
int
am7990_mediachange(ifp)
struct ifnet *ifp;
{
struct am7990_softc *sc = ifp->if_softc;
if (sc->sc_mediachange)
return ((*sc->sc_mediachange)(sc));
return (EINVAL);
}
void
am7990_mediastatus(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct am7990_softc *sc = ifp->if_softc;
if ((ifp->if_flags & IFF_UP) == 0)
return;
ifmr->ifm_status = IFM_AVALID;
if (sc->sc_havecarrier)
ifmr->ifm_status |= IFM_ACTIVE;
if (sc->sc_mediastatus)
(*sc->sc_mediastatus)(sc, ifmr);
}
/*
* Setup output on interface.
* Get another datagram to send off of the interface queue, and map it to the
* interface before starting the output.
* Called only at splimp or interrupt level.
*/
void
am7990_start(ifp)
register struct ifnet *ifp;
{
register struct am7990_softc *sc = ifp->if_softc;
register int bix;
register struct mbuf *m;
struct letmd tmd;
int rp;
int len;
if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
return;
bix = sc->sc_last_td;
for (;;) {
rp = LE_TMDADDR(sc, bix);
(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
if (tmd.tmd1_bits & LE_T1_OWN) {
ifp->if_flags |= IFF_OACTIVE;
printf("missing buffer, no_td = %d, last_td = %d\n",
sc->sc_no_td, sc->sc_last_td);
}
IF_DEQUEUE(&ifp->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
/*
* Copy the mbuf chain into the transmit buffer.
*/
len = am7990_put(sc, LE_TBUFADDR(sc, bix), m);
#ifdef LEDEBUG
if (len > ETHERMTU + sizeof(struct ether_header))
printf("packet length %d\n", len);
#endif
ifp->if_timer = 5;
/*
* Init transmit registers, and set transmit start flag.
*/
tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
tmd.tmd2 = -len | LE_XMD2_ONES;
tmd.tmd3 = 0;
(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
#ifdef LEDEBUG
if (sc->sc_debug)
am7990_xmit_print(sc, sc->sc_last_td);
#endif
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
if (++bix == sc->sc_ntbuf)
bix = 0;
if (++sc->sc_no_td == sc->sc_ntbuf) {
ifp->if_flags |= IFF_OACTIVE;
break;
}
}
sc->sc_last_td = bix;
}
/*
* Process an ioctl request.
*/
int
am7990_ioctl(ifp, cmd, data)
register struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
register struct am7990_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
int s, error = 0;
s = splimp();
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
am7990_init(sc);
arp_ifinit((struct arpcom *)ifp, 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 *)LLADDR(ifp->if_sadl);
else {
bcopy(ina->x_host.c_host,
LLADDR(ifp->if_sadl),
sizeof(sc->sc_enaddr));
}
/* Set new address. */
am7990_init(sc);
break;
}
#endif
default:
am7990_init(sc);
break;
}
break;
#if defined(CCITT) && defined(LLC)
case SIOCSIFCONF_X25:
ifp->if_flags |= IFF_UP;
ifa->ifa_rtrequest = cons_rtrequest; /* XXX */
error = x25_llcglue(PRC_IFUP, ifa->ifa_addr);
if (error == 0)
am7990_init(sc);
break;
#endif /* CCITT && LLC */
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
(ifp->if_flags & IFF_RUNNING) != 0) {
/*
* If interface is marked down and it is running, then
* stop it.
*/
am7990_stop(sc);
ifp->if_flags &= ~IFF_RUNNING;
} else if ((ifp->if_flags & IFF_UP) != 0 &&
(ifp->if_flags & IFF_RUNNING) == 0) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
am7990_init(sc);
} else {
/*
* Reset the interface to pick up changes in any other
* flags that affect hardware registers.
*/
/*am7990_stop(sc);*/
am7990_init(sc);
}
#ifdef LEDEBUG
if (ifp->if_flags & IFF_DEBUG)
sc->sc_debug = 1;
else
sc->sc_debug = 0;
#endif
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
am7990_reset(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
break;
default:
error = EINVAL;
break;
}
splx(s);
return (error);
}
hide void
am7990_shutdown(arg)
void *arg;
{
am7990_stop((struct am7990_softc *)arg);
}
#ifdef LEDEBUG
void
am7990_recv_print(sc, no)
struct am7990_softc *sc;
int no;
{
struct lermd rmd;
u_int16_t len;
struct ether_header eh;
(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
len = rmd.rmd3;
printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
len);
printf("%s: status %04x\n", sc->sc_dev.dv_xname,
(*sc->sc_rdcsr)(sc, LE_CSR0));
printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
sc->sc_dev.dv_xname,
rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
if (len >= sizeof(eh)) {
(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
printf("%s: dst %s", sc->sc_dev.dv_xname,
ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
}
}
void
am7990_xmit_print(sc, no)
struct am7990_softc *sc;
int no;
{
struct letmd tmd;
u_int16_t len;
struct ether_header eh;
(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
len = -tmd.tmd2;
printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
len);
printf("%s: status %04x\n", sc->sc_dev.dv_xname,
(*sc->sc_rdcsr)(sc, LE_CSR0));
printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
sc->sc_dev.dv_xname,
tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3);
if (len >= sizeof(eh)) {
(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
printf("%s: dst %s", sc->sc_dev.dv_xname,
ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
}
}
#endif /* LEDEBUG */
/*
* Set up the logical address filter.
*/
void
am7990_setladrf(ac, af)
struct arpcom *ac;
u_int16_t *af;
{
#if 0
struct ifnet *ifp = &ac->ac_if;
struct ether_multi *enm;
register u_char *cp;
register u_int32_t crc;
static const u_int32_t crctab[] = {
0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
};
register int 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.
*/
if (ifp->if_flags & IFF_PROMISC)
goto allmulti;
af[0] = af[1] = af[2] = af[3] = 0x0000;
ETHER_FIRST_MULTI(step, ac, enm);
while (enm != NULL) {
if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) {
/*
* 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.)
*/
goto allmulti;
}
cp = enm->enm_addrlo;
crc = 0xffffffff;
for (len = sizeof(enm->enm_addrlo); --len >= 0;) {
crc ^= *cp++;
crc = (crc >> 4) ^ crctab[crc & 0xf];
crc = (crc >> 4) ^ crctab[crc & 0xf];
}
/* Just want the 6 most significant bits. */
crc >>= 26;
/* Set the corresponding bit in the filter. */
af[crc >> 4] |= 1 << (crc & 0xf);
ETHER_NEXT_MULTI(step, enm);
}
ifp->if_flags &= ~IFF_ALLMULTI;
return;
allmulti:
ifp->if_flags |= IFF_ALLMULTI;
af[0] = af[1] = af[2] = af[3] = 0xffff;
#endif
}
/*
* Routines for accessing the transmit and receive buffers.
* The various CPU and adapter configurations supported by this
* driver require three different access methods for buffers
* and descriptors:
* (1) contig (contiguous data; no padding),
* (2) gap2 (two bytes of data followed by two bytes of padding),
* (3) gap16 (16 bytes of data followed by 16 bytes of padding).
*/
/*
* contig: contiguous data with no padding.
*
* Buffers may have any alignment.
*/
void
am7990_copytobuf_contig(sc, from, boff, len)
struct am7990_softc *sc;
void *from;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
/*
* Just call bcopy() to do the work.
*/
bcopy(from, buf + boff, len);
}
void
am7990_copyfrombuf_contig(sc, to, boff, len)
struct am7990_softc *sc;
void *to;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
/*
* Just call bcopy() to do the work.
*/
bcopy(buf + boff, to, len);
}
void
am7990_zerobuf_contig(sc, boff, len)
struct am7990_softc *sc;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
/*
* Just let bzero() do the work
*/
bzero(buf + boff, len);
}
#if 0
/*
* Examples only; duplicate these and tweak (if necessary) in
* machine-specific front-ends.
*/
/*
* gap2: two bytes of data followed by two bytes of pad.
*
* Buffers must be 4-byte aligned. The code doesn't worry about
* doing an extra byte.
*/
void
am7990_copytobuf_gap2(sc, fromv, boff, len)
struct am7990_softc *sc;
void *fromv;
int boff;
register int len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t from = fromv;
register volatile u_int16_t *bptr;
if (boff & 0x1) {
/* handle unaligned first byte */
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
*bptr = (*from++ << 8) | (*bptr & 0xff);
bptr += 2;
len--;
} else
bptr = ((volatile u_int16_t *)buf) + boff;
while (len > 1) {
*bptr = (from[1] << 8) | (from[0] & 0xff);
bptr += 2;
from += 2;
len -= 2;
}
if (len == 1)
*bptr = (u_int16_t)*from;
}
void
am7990_copyfrombuf_gap2(sc, tov, boff, len)
struct am7990_softc *sc;
void *tov;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t to = tov;
register volatile u_int16_t *bptr;
register u_int16_t tmp;
if (boff & 0x1) {
/* handle unaligned first byte */
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
*to++ = (*bptr >> 8) & 0xff;
bptr += 2;
len--;
} else
bptr = ((volatile u_int16_t *)buf) + boff;
while (len > 1) {
tmp = *bptr;
*to++ = tmp & 0xff;
*to++ = (tmp >> 8) & 0xff;
bptr += 2;
len -= 2;
}
if (len == 1)
*to = *bptr & 0xff;
}
void
am7990_zerobuf_gap2(sc, boff, len)
struct am7990_softc *sc;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
register volatile u_int16_t *bptr;
if ((unsigned)boff & 0x1) {
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
*bptr &= 0xff;
bptr += 2;
len--;
} else
bptr = ((volatile u_int16_t *)buf) + boff;
while (len > 0) {
*bptr = 0;
bptr += 2;
len -= 2;
}
}
/*
* gap16: 16 bytes of data followed by 16 bytes of pad.
*
* Buffers must be 32-byte aligned.
*/
void
am7990_copytobuf_gap16(sc, fromv, boff, len)
struct am7990_softc *sc;
void *fromv;
int boff;
register int len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t from = fromv;
register caddr_t bptr;
register int xfer;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
while (len > 0) {
bcopy(from, bptr + boff, xfer);
from += xfer;
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
}
}
void
am7990_copyfrombuf_gap16(sc, tov, boff, len)
struct am7990_softc *sc;
void *tov;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t to = tov;
register caddr_t bptr;
register int xfer;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
while (len > 0) {
bcopy(bptr + boff, to, xfer);
to += xfer;
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
}
}
void
am7990_zerobuf_gap16(sc, boff, len)
struct am7990_softc *sc;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t bptr;
register int xfer;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
while (len > 0) {
bzero(bptr + boff, xfer);
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
}
}
#endif /* Example only */
char *
ether_sprintf(ap)
register u_char *ap;
{
register i;
static char etherbuf[18];
register char *cp = etherbuf;
static char digits[] = "0123456789abcdef";
for (i = 0; i < 6; i++) {
*cp++ = digits[*ap >> 4];
*cp++ = digits[*ap++ & 0xf];
*cp++ = ':';
}
*--cp = 0;
return (etherbuf);
}
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