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Diffstat (limited to 'sys/alpha/tc/am7990.c')
| -rw-r--r-- | sys/alpha/tc/am7990.c | 1473 |
1 files changed, 1473 insertions, 0 deletions
diff --git a/sys/alpha/tc/am7990.c b/sys/alpha/tc/am7990.c new file mode 100644 index 0000000..6c65f82 --- /dev/null +++ b/sys/alpha/tc/am7990.c @@ -0,0 +1,1473 @@ +/* $Id$ */ +/* $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 = ⊤ + + 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); +} |
