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/* $NetBSD: am79900.c,v 1.31 2020/10/20 18:17:58 roy 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.
*
* 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.
*
* 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) 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. 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
*/
/*-
* Copyright (c) 1998
* Matthias Drochner. All rights reserved.
* Copyright (c) 1995 Charles M. Hannum. 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: am79900.c,v 1.31 2020/10/20 18:17:58 roy Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/rndsource.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <net/bpf.h>
#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am79900reg.h>
#include <dev/ic/am79900var.h>
static void am79900_meminit(struct lance_softc *);
static void am79900_start(struct ifnet *);
#if defined(_KERNEL_OPT)
#include "opt_ddb.h"
#endif
#ifdef LEDEBUG
static void am79900_recv_print(struct lance_softc *, int);
static void am79900_xmit_print(struct lance_softc *, int);
#endif
#define ifp (&sc->sc_ethercom.ec_if)
void
am79900_config(struct am79900_softc *sc)
{
int mem, i;
sc->lsc.sc_meminit = am79900_meminit;
sc->lsc.sc_start = am79900_start;
lance_config(&sc->lsc);
if_deferred_start_init(&sc->lsc.sc_ethercom.ec_if, NULL);
mem = 0;
sc->lsc.sc_initaddr = mem;
mem += sizeof(struct leinit);
sc->lsc.sc_rmdaddr = mem;
mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
sc->lsc.sc_tmdaddr = mem;
mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
sc->lsc.sc_rbufaddr[i] = mem;
for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
sc->lsc.sc_tbufaddr[i] = mem;
if (mem > sc->lsc.sc_memsize)
panic("%s: memsize", device_xname(sc->lsc.sc_dev));
}
/*
* Set up the initialization block and the descriptor rings.
*/
static void
am79900_meminit(struct lance_softc *sc)
{
u_long a;
int bix;
struct leinit init;
struct lermd rmd;
struct letmd tmd;
uint8_t *myaddr;
if (ifp->if_flags & IFF_PROMISC)
init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
else
init.init_mode = LE_MODE_NORMAL;
if (sc->sc_initmodemedia == 1)
init.init_mode |= LE_MODE_PSEL0;
init.init_mode |= ((ffs(sc->sc_ntbuf) - 1) << 28)
| ((ffs(sc->sc_nrbuf) - 1) << 20);
/*
* Update our private copy of the Ethernet address.
* We NEED the copy so we can ensure its alignment!
*/
memcpy(sc->sc_enaddr, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
myaddr = sc->sc_enaddr;
init.init_padr[0] = myaddr[0] | (myaddr[1] << 8)
| (myaddr[2] << 16) | (myaddr[3] << 24);
init.init_padr[1] = myaddr[4] | (myaddr[5] << 8);
lance_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;
a = sc->sc_addr + LE_TMDADDR(sc, 0);
init.init_tdra = a;
(*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 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
rmd.rmd2 = 0;
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 = LE_T1_ONES;
tmd.tmd2 = 0;
tmd.tmd3 = 0;
(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
sizeof(tmd));
}
}
static inline void
am79900_rint(struct lance_softc *sc)
{
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 & LE_R1_OWN)
break;
if (rmd.rmd1 & LE_R1_ERR) {
if (rmd.rmd1 & LE_R1_ENP) {
#ifdef LEDEBUG
if ((rmd.rmd1 & LE_R1_OFLO) == 0) {
if (rmd.rmd1 & LE_R1_FRAM)
printf("%s: framing error\n",
device_xname(sc->sc_dev));
if (rmd.rmd1 & LE_R1_CRC)
printf("%s: crc mismatch\n",
device_xname(sc->sc_dev));
}
#endif
} else {
if (rmd.rmd1 & LE_R1_OFLO)
printf("%s: overflow\n",
device_xname(sc->sc_dev));
}
if (rmd.rmd1 & LE_R1_BUFF)
printf("%s: receive buffer error\n",
device_xname(sc->sc_dev));
if_statinc(ifp, if_ierrors);
} else if ((rmd.rmd1 & (LE_R1_STP | LE_R1_ENP)) !=
(LE_R1_STP | LE_R1_ENP)) {
printf("%s: dropping chained buffer\n",
device_xname(sc->sc_dev));
if_statinc(ifp, if_ierrors);
} else {
#ifdef LEDEBUG
if (sc->sc_debug)
am79900_recv_print(sc, sc->sc_last_rd);
#endif
lance_read(sc, LE_RBUFADDR(sc, bix),
(rmd.rmd2 & 0xfff) - 4);
}
rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
rmd.rmd2 = 0;
rmd.rmd3 = 0;
(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
#ifdef LEDEBUG
if (sc->sc_debug)
printf("sc->sc_last_rd = %x, rmd: "
"adr %08x, flags/blen %08x\n",
sc->sc_last_rd,
rmd.rmd0, rmd.rmd1);
#endif
if (++bix == sc->sc_nrbuf)
bix = 0;
}
sc->sc_last_rd = bix;
}
static inline void
am79900_tint(struct lance_softc *sc)
{
int bix;
struct letmd tmd;
bix = sc->sc_first_td;
for (;;) {
if (sc->sc_no_td <= 0)
break;
(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
sizeof(tmd));
#ifdef LEDEBUG
if (sc->sc_debug)
printf("trans tmd: "
"adr %08x, flags/blen %08x\n",
tmd.tmd0, tmd.tmd1);
#endif
if (tmd.tmd1 & LE_T1_OWN)
break;
if (tmd.tmd1 & LE_T1_ERR) {
if (tmd.tmd2 & LE_T2_BUFF)
printf("%s: transmit buffer error\n",
device_xname(sc->sc_dev));
else if (tmd.tmd2 & LE_T2_UFLO)
printf("%s: underflow\n",
device_xname(sc->sc_dev));
if (tmd.tmd2 & (LE_T2_BUFF | LE_T2_UFLO)) {
lance_reset(sc);
return;
}
if (tmd.tmd2 & LE_T2_LCAR) {
sc->sc_havecarrier = 0;
if (sc->sc_nocarrier)
(*sc->sc_nocarrier)(sc);
else
printf("%s: lost carrier\n",
device_xname(sc->sc_dev));
}
if (tmd.tmd2 & LE_T2_LCOL)
if_statinc(ifp, if_collisions);
if (tmd.tmd2 & LE_T2_RTRY) {
#ifdef LEDEBUG
printf("%s: excessive collisions\n",
device_xname(sc->sc_dev));
#endif
if_statadd(ifp, if_collisions, 16);
}
if_statinc(ifp, if_oerrors);
} else {
if (tmd.tmd1 & LE_T1_ONE)
if_statinc(ifp, if_collisions);
else if (tmd.tmd1 & LE_T1_MORE)
/* Real number is unknown. */
if_statadd(ifp, if_collisions, 2);
if_statinc(ifp, if_opackets);
}
if (++bix == sc->sc_ntbuf)
bix = 0;
--sc->sc_no_td;
}
sc->sc_first_td = bix;
if_schedule_deferred_start(ifp);
if (sc->sc_no_td == 0)
ifp->if_timer = 0;
}
/*
* Controller interrupt.
*/
int
am79900_intr(void *arg)
{
struct lance_softc *sc = arg;
uint16_t isr;
isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
sc->sc_saved_csr0 = 0;
#if defined(LEDEBUG) && LEDEBUG > 1
if (sc->sc_debug)
printf("%s: am79900_intr entering with isr=%04x\n",
device_xname(sc->sc_dev), isr);
#endif
if ((isr & LE_C0_INTR) == 0)
return (0);
(*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", device_xname(sc->sc_dev));
#endif
if_statinc(ifp, if_oerrors);
}
#if 0
if (isr & LE_C0_CERR) {
printf("%s: collision error\n",
device_xname(sc->sc_dev));
if_statinc(ifp, if_collisions);
}
#endif
if (isr & LE_C0_MISS) {
#ifdef LEDEBUG
printf("%s: missed packet\n", device_xname(sc->sc_dev));
#endif
if_statinc(ifp, if_ierrors);
}
if (isr & LE_C0_MERR) {
printf("%s: memory error\n", device_xname(sc->sc_dev));
lance_reset(sc);
return (1);
}
}
if ((isr & LE_C0_RXON) == 0) {
printf("%s: receiver disabled\n", device_xname(sc->sc_dev));
if_statinc(ifp, if_ierrors);
lance_reset(sc);
return (1);
}
if ((isr & LE_C0_TXON) == 0) {
printf("%s: transmitter disabled\n", device_xname(sc->sc_dev));
if_statinc(ifp, if_oerrors);
lance_reset(sc);
return (1);
}
/*
* Pretend we have carrier; if we don't this will be cleared
* shortly.
*/
const int ocarrier = sc->sc_havecarrier;
sc->sc_havecarrier = 1;
if (isr & LE_C0_RINT)
am79900_rint(sc);
if (isr & LE_C0_TINT)
am79900_tint(sc);
if (sc->sc_havecarrier != ocarrier)
if_link_state_change(ifp,
sc->sc_havecarrier ? LINK_STATE_UP : LINK_STATE_DOWN);
rnd_add_uint32(&sc->rnd_source, isr);
return (1);
}
#undef ifp
/*
* 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 splnet or interrupt level.
*/
static void
am79900_start(struct ifnet *ifp)
{
struct lance_softc *sc = ifp->if_softc;
int bix;
struct mbuf *m;
struct letmd tmd;
int rp;
int len;
if ((ifp->if_flags & IFF_RUNNING) != IFF_RUNNING)
return;
bix = sc->sc_last_td;
while (sc->sc_no_td < sc->sc_ntbuf) {
rp = LE_TMDADDR(sc, bix);
(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
if (tmd.tmd1 & LE_T1_OWN) {
printf("%s: missing buffer, no_td = %d, last_td = %d\n",
device_xname(sc->sc_dev), sc->sc_no_td,
sc->sc_last_td);
break;
}
IFQ_DEQUEUE(&ifp->if_snd, m);
if (m == 0)
break;
/*
* If BPF is listening on this interface, let it see the packet
* before we commit it to the wire.
*/
bpf_mtap(ifp, m, BPF_D_OUT);
/*
* Copy the mbuf chain into the transmit buffer.
*/
len = lance_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 = LE_T1_OWN | LE_T1_STP | LE_T1_ENP | LE_T1_ONES | (-len & 0xfff);
tmd.tmd2 = 0;
tmd.tmd3 = 0;
(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
#ifdef LEDEBUG
if (sc->sc_debug)
am79900_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;
sc->sc_no_td++;
}
sc->sc_last_td = bix;
}
#ifdef LEDEBUG
static void
am79900_recv_print(struct lance_softc *sc, int no)
{
struct lermd rmd;
uint16_t len;
struct ether_header eh;
(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
len = (rmd.rmd2 & 0xfff) - 4;
printf("%s: receive buffer %d, len = %d\n",
device_xname(sc->sc_dev), no, len);
printf("%s: status %04x\n", device_xname(sc->sc_dev),
(*sc->sc_rdcsr)(sc, LE_CSR0));
printf("%s: adr %08x, flags/blen %08x\n",
device_xname(sc->sc_dev), rmd.rmd0, rmd.rmd1);
if (len >= sizeof(eh)) {
(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
printf("%s: dst %s", device_xname(sc->sc_dev),
ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
}
}
static void
am79900_xmit_print(struct lance_softc *sc, int no)
{
struct letmd tmd;
uint16_t len;
struct ether_header eh;
(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
len = -(tmd.tmd1 & 0xfff);
printf("%s: transmit buffer %d, len = %d\n",
device_xname(sc->sc_dev), no, len);
printf("%s: status %04x\n", device_xname(sc->sc_dev),
(*sc->sc_rdcsr)(sc, LE_CSR0));
printf("%s: adr %08x, flags/blen %08x\n",
device_xname(sc->sc_dev), tmd.tmd0, tmd.tmd1);
if (len >= sizeof(eh)) {
(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
printf("%s: dst %s", device_xname(sc->sc_dev),
ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
}
}
#endif /* LEDEBUG */
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