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/* $NetBSD: am7990.c,v 1.68 2005/12/11 12:21:25 christos Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum and 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) 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
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/le/am7990.c 174986 2007-12-30 00:23:38Z marius $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/socket.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_var.h>
#include <machine/bus.h>
#include <dev/le/lancereg.h>
#include <dev/le/lancevar.h>
#include <dev/le/am7990reg.h>
#include <dev/le/am7990var.h>
static void am7990_meminit(struct lance_softc *);
static void am7990_rint(struct lance_softc *);
static void am7990_tint(struct lance_softc *);
static void am7990_start_locked(struct lance_softc *sc);
#ifdef LEDEBUG
static void am7990_recv_print(struct lance_softc *, int);
static void am7990_xmit_print(struct lance_softc *, int);
#endif
int
am7990_config(struct am7990_softc *sc, const char* name, int unit)
{
int error, mem;
sc->lsc.sc_meminit = am7990_meminit;
sc->lsc.sc_start_locked = am7990_start_locked;
error = lance_config(&sc->lsc, name, unit);
if (error != 0)
return (error);
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;
sc->lsc.sc_rbufaddr = mem;
mem += LEBLEN * sc->lsc.sc_nrbuf;
sc->lsc.sc_tbufaddr = mem;
mem += LEBLEN * sc->lsc.sc_ntbuf;
if (mem > sc->lsc.sc_memsize)
panic("%s: memsize", __func__);
lance_attach(&sc->lsc);
return (0);
}
void
am7990_detach(struct am7990_softc *sc)
{
lance_detach(&sc->lsc);
}
/*
* Set up the initialization block and the descriptor rings.
*/
static void
am7990_meminit(struct lance_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct leinit init;
struct lermd rmd;
struct letmd tmd;
u_long a;
int bix;
LE_LOCK_ASSERT(sc, MA_OWNED);
if (ifp->if_flags & IFF_PROMISC)
init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
else
init.init_mode = LE_MODE_NORMAL;
init.init_padr[0] = (sc->sc_enaddr[1] << 8) | sc->sc_enaddr[0];
init.init_padr[1] = (sc->sc_enaddr[3] << 8) | sc->sc_enaddr[2];
init.init_padr[2] = (sc->sc_enaddr[5] << 8) | sc->sc_enaddr[4];
lance_setladrf(sc, 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 = LE_XMD2_ONES;
tmd.tmd3 = 0;
(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
sizeof(tmd));
}
}
static void
am7990_rint(struct lance_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct mbuf *m;
struct lermd rmd;
int bix, rp;
#if defined(LANCE_REVC_BUG)
struct ether_header *eh;
/* Make sure this is short-aligned, for ether_cmp(). */
static uint16_t bcast_enaddr[3] = { ~0, ~0, ~0 };
#endif
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;
m = NULL;
if ((rmd.rmd1_bits & (LE_R1_ERR | LE_R1_STP | LE_R1_ENP)) !=
(LE_R1_STP | LE_R1_ENP)) {
if (rmd.rmd1_bits & LE_R1_ERR) {
#ifdef LEDEBUG
if (rmd.rmd1_bits & LE_R1_ENP) {
if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
if (rmd.rmd1_bits & LE_R1_FRAM)
if_printf(ifp,
"framing error\n");
if (rmd.rmd1_bits & LE_R1_CRC)
if_printf(ifp,
"crc mismatch\n");
}
} else
if (rmd.rmd1_bits & LE_R1_OFLO)
if_printf(ifp, "overflow\n");
#endif
if (rmd.rmd1_bits & LE_R1_BUFF)
if_printf(ifp,
"receive buffer error\n");
} else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
(LE_R1_STP | LE_R1_ENP))
if_printf(ifp, "dropping chained buffer\n");
} else {
#ifdef LEDEBUG
if (sc->sc_flags & LE_DEBUG)
am7990_recv_print(sc, bix);
#endif
/* Pull the packet off the interface. */
m = lance_get(sc, LE_RBUFADDR(sc, bix),
(int)rmd.rmd3 - ETHER_CRC_LEN);
}
rmd.rmd1_bits = LE_R1_OWN;
rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
rmd.rmd3 = 0;
(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
if (++bix == sc->sc_nrbuf)
bix = 0;
if (m != NULL) {
ifp->if_ipackets++;
#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 workaround is to ignore
* packets with an invalid destination address
* (garbage will usually not match).
* Of course, this precludes multicast support...
*/
eh = mtod(m, struct ether_header *);
if (ether_cmp(eh->ether_dhost, sc->sc_enaddr) &&
ether_cmp(eh->ether_dhost, bcast_enaddr)) {
m_freem(m);
continue;
}
#endif
/* Pass the packet up. */
LE_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
LE_LOCK(sc);
} else
ifp->if_ierrors++;
}
sc->sc_last_rd = bix;
}
static void
am7990_tint(struct lance_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct letmd tmd;
int bix;
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_flags & LE_DEBUG)
if_printf(ifp, "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
if (tmd.tmd1_bits & LE_T1_OWN)
break;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
if (tmd.tmd1_bits & LE_T1_ERR) {
if (tmd.tmd3 & LE_T3_BUFF)
if_printf(ifp, "transmit buffer error\n");
else if (tmd.tmd3 & LE_T3_UFLO)
if_printf(ifp, "underflow\n");
if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
lance_init_locked(sc);
return;
}
if (tmd.tmd3 & LE_T3_LCAR) {
if (sc->sc_flags & LE_CARRIER)
if_link_state_change(ifp,
LINK_STATE_DOWN);
sc->sc_flags &= ~LE_CARRIER;
if (sc->sc_nocarrier)
(*sc->sc_nocarrier)(sc);
else
if_printf(ifp, "lost carrier\n");
}
if (tmd.tmd3 & LE_T3_LCOL)
ifp->if_collisions++;
if (tmd.tmd3 & LE_T3_RTRY) {
#ifdef LEDEBUG
if_printf(ifp, "excessive collisions, tdr %d\n",
tmd.tmd3 & LE_T3_TDR_MASK);
#endif
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;
sc->sc_wdog_timer = sc->sc_no_td > 0 ? 5 : 0;
}
/*
* Controller interrupt
*/
void
am7990_intr(void *arg)
{
struct lance_softc *sc = arg;
struct ifnet *ifp = sc->sc_ifp;
uint16_t isr;
LE_LOCK(sc);
if (sc->sc_hwintr && (*sc->sc_hwintr)(sc) == -1) {
ifp->if_ierrors++;
lance_init_locked(sc);
LE_UNLOCK(sc);
return;
}
isr = (*sc->sc_rdcsr)(sc, LE_CSR0);
#if defined(LEDEBUG) && LEDEBUG > 1
if (sc->sc_flags & LE_DEBUG)
if_printf(ifp, "%s: entering with isr=%04x\n", __func__, isr);
#endif
if ((isr & LE_C0_INTR) == 0) {
LE_UNLOCK(sc);
return;
}
/*
* Clear interrupt source flags and turn off interrupts. If we
* don't clear these flags before processing their sources we
* could completely miss some interrupt events as the NIC can
* change these flags while we're in this handler. We toggle
* the interrupt enable bit in order to keep receiving them
* (some chips work without this, some don't).
*/
(*sc->sc_wrcsr)(sc, LE_CSR0, isr & ~(LE_C0_INEA | LE_C0_TDMD |
LE_C0_STOP | LE_C0_STRT | LE_C0_INIT));
if (isr & LE_C0_ERR) {
if (isr & LE_C0_BABL) {
#ifdef LEDEBUG
if_printf(ifp, "babble\n");
#endif
ifp->if_oerrors++;
}
#if 0
if (isr & LE_C0_CERR) {
if_printf(ifp, "collision error\n");
ifp->if_collisions++;
}
#endif
if (isr & LE_C0_MISS) {
#ifdef LEDEBUG
if_printf(ifp, "missed packet\n");
#endif
ifp->if_ierrors++;
}
if (isr & LE_C0_MERR) {
if_printf(ifp, "memory error\n");
lance_init_locked(sc);
LE_UNLOCK(sc);
return;
}
}
if ((isr & LE_C0_RXON) == 0) {
if_printf(ifp, "receiver disabled\n");
ifp->if_ierrors++;
lance_init_locked(sc);
LE_UNLOCK(sc);
return;
}
if ((isr & LE_C0_TXON) == 0) {
if_printf(ifp, "transmitter disabled\n");
ifp->if_oerrors++;
lance_init_locked(sc);
LE_UNLOCK(sc);
return;
}
/*
* Pretend we have carrier; if we don't this will be cleared shortly.
*/
if (!(sc->sc_flags & LE_CARRIER))
if_link_state_change(ifp, LINK_STATE_UP);
sc->sc_flags |= LE_CARRIER;
if (isr & LE_C0_RINT)
am7990_rint(sc);
if (isr & LE_C0_TINT)
am7990_tint(sc);
/* Enable interrupts again. */
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
am7990_start_locked(sc);
LE_UNLOCK(sc);
}
/*
* Set up output on interface.
* Get another datagram to send off of the interface queue, and map it to the
* interface before starting the output.
*/
static void
am7990_start_locked(struct lance_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct letmd tmd;
struct mbuf *m;
int bix, enq, len, rp;
LE_LOCK_ASSERT(sc, MA_OWNED);
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING)
return;
bix = sc->sc_last_td;
enq = 0;
for (; sc->sc_no_td < sc->sc_ntbuf &&
!IFQ_DRV_IS_EMPTY(&ifp->if_snd);) {
rp = LE_TMDADDR(sc, bix);
(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
if (tmd.tmd1_bits & LE_T1_OWN) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
if_printf(ifp,
"missing buffer, no_td = %d, last_td = %d\n",
sc->sc_no_td, sc->sc_last_td);
}
IFQ_DRV_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);
/*
* Copy the mbuf chain into the transmit buffer.
*/
len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
#ifdef LEDEBUG
if (len > ETHERMTU + ETHER_HDR_LEN)
if_printf(ifp, "packet length %d\n", len);
#endif
/*
* 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_flags & LE_DEBUG)
am7990_xmit_print(sc, bix);
#endif
(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
enq++;
if (++bix == sc->sc_ntbuf)
bix = 0;
if (++sc->sc_no_td == sc->sc_ntbuf) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
}
sc->sc_last_td = bix;
if (enq > 0)
sc->sc_wdog_timer = 5;
}
#ifdef LEDEBUG
static void
am7990_recv_print(struct lance_softc *sc, int no)
{
struct ifnet *ifp = sc->sc_ifp;
struct ether_header eh;
struct lermd rmd;
uint16_t len;
(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
len = rmd.rmd3;
if_printf(ifp, "receive buffer %d, len = %d\n", no, len);
if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
if_printf(ifp,
"ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
if (len - ETHER_CRC_LEN >= sizeof(eh)) {
(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
}
}
static void
am7990_xmit_print(struct lance_softc *sc, int no)
{
struct ifnet *ifp = sc->sc_ifp;
struct ether_header eh;
struct letmd tmd;
uint16_t len;
(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
len = -tmd.tmd2;
if_printf(ifp, "transmit buffer %d, len = %d\n", no, len);
if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
if_printf(ifp,
"ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
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));
if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
}
}
#endif /* LEDEBUG */