/* $OpenBSD: smc90cx6.c,v 1.7 2004/05/12 06:35:10 tedu Exp $ */ /* $NetBSD: smc90cx6.c,v 1.17 1996/05/07 01:43:18 thorpej Exp $ */ /* * Copyright (c) 1994, 1995 Ignatios Souvatzis * All rights reserved. * * 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 Ignatios Souvatzis * for the NetBSD Project. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * Driver for the Commodore Business Machines ARCnet card. */ #define BAHASMCOPY /**/ #define BAHSOFTCOPY /**/ #define BAHRETRANSMIT /**/ /* #define BAHTIMINGS */ /* #define BAH_DEBUG 3 */ /* zeroth version of M68060 support */ #if defined(M68060) && defined(BAHASMCOPY) #undef BAHASMCOPY #endif #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #include #endif #if NBPFILTER > 0 #include #endif #include #include #include #include #include #include #include /* these should be elsewhere */ #define ARC_MIN_LEN 1 #define ARC_MIN_FORBID_LEN 254 #define ARC_MAX_FORBID_LEN 256 #define ARC_MAX_LEN 508 #define ARC_ADDR_LEN 1 /* for watchdog timer. This should be more than enough. */ #define ARCTIMEOUT (5*IFNET_SLOWHZ) /* * This currently uses 2 bufs for tx, 2 for rx * * New rx protocol: * * rx has a fillcount variable. If fillcount > (NRXBUF-1), * rx can be switched off from rx hard int. * Else rx is restarted on the other receiver. * rx soft int counts down. if it is == (NRXBUF-1), it restarts * the receiver. * To ensure packet ordering (we need that for 1201 later), we have a counter * which is incremented modulo 256 on each receive and a per buffer * variable, which is set to the counter on filling. The soft int can * compare both values to determine the older packet. * * Transmit direction: * * bah_start checks tx_fillcount * case 2: return * * else fill tx_act ^ 1 && inc tx_fillcount * * check tx_fillcount again. * case 2: set IFF_OACTIVE to stop arc_output from filling us. * case 1: start tx * * tint clears IFF_OCATIVE, decrements and checks tx_fillcount * case 1: start tx on tx_act ^ 1, softcall bah_start * case 0: softcall bah_start * * #define fill(i) get mbuf && copy mbuf to chip(i) */ #ifdef BAHTIMINGS /* * ARCnet stats; per interface. */ struct bah_stats { u_long mincopyin; u_long maxcopyin; /* divided by byte count */ u_long mincopyout; u_long maxcopyout; u_long minsend; u_long maxsend; u_long lasttxstart_mics; struct timeval lasttxstart_tv; }; #error BAHTIMINGS CODE IS BROKEN; use of clkread() is bogus #endif /* * Arcnet software status per interface */ struct bah_softc { struct device sc_dev; struct arccom sc_arccom; /* Common arcnet structures */ struct isr sc_isr; struct a2060 *sc_base; u_long sc_recontime; /* seconds only, I'm lazy */ u_long sc_reconcount; /* for the above */ u_long sc_reconcount_excessive; /* for the above */ #define ARC_EXCESSIVE_RECONS 20 #define ARC_EXCESSIVE_RECONS_REWARN 400 u_char sc_intmask; u_char sc_rx_act; /* 2..3 */ u_char sc_tx_act; /* 0..1 */ u_char sc_rx_fillcount; u_char sc_tx_fillcount; u_char sc_broadcast[2]; /* is it a broadcast packet? */ u_char sc_retransmits[2]; /* unused at the moment */ #ifdef BAHTIMINGS struct bah_stats sc_stats; #endif }; int bah_zbus_match(struct device *, void *, void *); void bah_zbus_attach(struct device *, struct device *, void *); void bah_init(struct bah_softc *); void bah_reset(struct bah_softc *); void bah_stop(struct bah_softc *); void bah_start(struct ifnet *); int bahintr(struct bah_softc *sc); int bah_ioctl(struct ifnet *, unsigned long, caddr_t); void bah_watchdog(struct ifnet *); void movepout(u_char *from, u_char __volatile *to, int len); void movepin(u_char __volatile *from, u_char *to, int len); void bah_srint(void *vsc, void *dummy); void callstart(void *vsc, void *dummy); #ifdef BAHTIMINGS int clkread(); #endif struct cfattach bah_zbus_ca = { sizeof(struct bah_softc), bah_zbus_match, bah_zbus_attach }; struct cfdriver bah_cd = { NULL, "bah", DV_IFNET }; int bah_zbus_match(parent, match, aux) struct device *parent; void *match, *aux; { struct zbus_args *zap = aux; if ((zap->manid == 514 || zap->manid == 1053) && zap->prodid == 9) return (1); return (0); } void bah_zbus_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct bah_softc *sc = (void *)self; struct zbus_args *zap = aux; struct ifnet *ifp = &sc->sc_arccom.ac_if; int s, linkaddress; #if (defined(BAH_DEBUG) && (BAH_DEBUG > 2)) printf("\n%s: attach(0x%x, 0x%x, 0x%x)\n", sc->sc_dev.dv_xname, parent, self, aux); #endif s = splhigh(); sc->sc_base = zap->va; /* * read the arcnet address from the board */ sc->sc_base->kick1 = 0x0; sc->sc_base->kick2 = 0x0; DELAY(200); sc->sc_base->kick1 = 0xFF; sc->sc_base->kick2 = 0xFF; do { DELAY(200); } while (!(sc->sc_base->status & ARC_POR)); linkaddress = sc->sc_base->dipswitches; #ifdef BAHTIMINGS printf(": link addr 0x%02x(%ld), with timer\n", linkaddress, linkaddress); #else printf(": link addr 0x%02x(%ld)\n", linkaddress, linkaddress); #endif sc->sc_arccom.ac_anaddr = linkaddress; /* clear the int mask... */ sc->sc_base->status = sc->sc_intmask = 0; sc->sc_base->command = ARC_CONF(CONF_LONG); sc->sc_base->command = ARC_CLR(CLR_POR|CLR_RECONFIG); sc->sc_recontime = sc->sc_reconcount = 0; /* and reenable kernel int level */ splx(s); /* * set interface to stopped condition (reset) */ bah_stop(sc); bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); ifp->if_softc = sc; ifp->if_output = arc_output; ifp->if_start = bah_start; ifp->if_ioctl = bah_ioctl; ifp->if_timer = 0; ifp->if_watchdog = bah_watchdog; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_NOARP; ifp->if_mtu = ARCMTU; IFQ_SET_READY(&ifp->if_snd); if_attach(ifp); arc_ifattach(ifp); #if NBPFILTER > 0 bpfattach(&ifp->if_bpf, ifp, DLT_ARCNET, ARC_HDRLEN); #endif /* under heavy load we need four of them: */ alloc_sicallback(); alloc_sicallback(); alloc_sicallback(); alloc_sicallback(); sc->sc_isr.isr_intr = bahintr; sc->sc_isr.isr_arg = sc; sc->sc_isr.isr_ipl = 2; add_isr(&sc->sc_isr); } /* * Initialize device * */ void bah_init(sc) struct bah_softc *sc; { struct ifnet *ifp; int s; ifp = &sc->sc_arccom.ac_if; if ((ifp->if_flags & IFF_RUNNING) == 0) { s = splnet(); ifp->if_flags |= IFF_RUNNING; bah_reset(sc); bah_start(ifp); splx(s); } } /* * Reset the interface... * * this assumes that it is called inside a critical section... * */ void bah_reset(sc) struct bah_softc *sc; { struct ifnet *ifp; int linkaddress; ifp = &sc->sc_arccom.ac_if; #ifdef BAH_DEBUG printf("%s: reset\n", sc->sc_dev.dv_xname); #endif /* stop hardware in case it still runs */ sc->sc_base->kick1 = 0; sc->sc_base->kick2 = 0; DELAY(200); /* and restart it */ sc->sc_base->kick1 = 0xFF; sc->sc_base->kick2 = 0xFF; do { DELAY(200); } while (!(sc->sc_base->status & ARC_POR)); linkaddress = sc->sc_base->dipswitches; #if defined(BAH_DEBUG) && (BAH_DEBUG > 2) printf("%s: reset: card reset, link addr = 0x%02x (%ld)\n", sc->sc_dev.dv_xname, linkaddress, linkaddress); #endif sc->sc_arccom.ac_anaddr = linkaddress; /* tell the routing level about the (possibly changed) link address */ arc_ifattach(ifp); /* POR is NMI, but we need it below: */ sc->sc_intmask = ARC_RECON|ARC_POR; sc->sc_base->status = sc->sc_intmask; sc->sc_base->command = ARC_CONF(CONF_LONG); #ifdef BAH_DEBUG printf("%s: reset: chip configured, status=0x%02x\n", sc->sc_dev.dv_xname, sc->sc_base->status); #endif sc->sc_base->command = ARC_CLR(CLR_POR|CLR_RECONFIG); #ifdef BAH_DEBUG printf("%s: reset: bits cleared, status=0x%02x\n", sc->sc_dev.dv_xname, sc->sc_base->status); #endif sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS; /* start receiver */ sc->sc_intmask |= ARC_RI; sc->sc_rx_fillcount = 0; sc->sc_rx_act = 2; sc->sc_base->command = ARC_RXBC(2); sc->sc_base->status = sc->sc_intmask; #ifdef BAH_DEBUG printf("%s: reset: started receiver, status=0x%02x\n", sc->sc_dev.dv_xname, sc->sc_base->status); #endif /* and init transmitter status */ sc->sc_tx_act = 0; sc->sc_tx_fillcount = 0; ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; #ifdef BAHTIMINGS bzero((caddr_t)&(sc->sc_stats), sizeof(sc->sc_stats)); sc->sc_stats.mincopyin = sc->sc_stats.mincopyout = sc->sc_stats.minsend = ULONG_MAX; #endif bah_start(ifp); } /* * Take interface offline */ void bah_stop(sc) struct bah_softc *sc; { /* Stop the interrupts */ sc->sc_base->status = 0; /* Stop the interface */ sc->sc_base->kick1 = 0; sc->sc_base->kick2 = 0; /* Stop watchdog timer */ sc->sc_arccom.ac_if.if_timer = 0; #ifdef BAHTIMINGS log(LOG_DEBUG,"%s: to board: %6lu .. %6lu ns/byte\n", sc->sc_dev.dv_xname, sc->sc_stats.mincopyout, sc->sc_stats.maxcopyout); log(LOG_DEBUG,"%s: from board: %6lu .. %6lu ns/byte\n", sc->sc_dev.dv_xname, sc->sc_stats.mincopyin, sc->sc_stats.maxcopyin); log(LOG_DEBUG,"%s: send time: %6lu .. %6lu mics/byte\n", sc->sc_dev.dv_xname, sc->sc_stats.minsend, sc->sc_stats.maxsend); sc->sc_stats.minsend = sc->sc_stats.mincopyout = sc->sc_stats.mincopyin = ULONG_MAX; sc->sc_stats.maxsend = sc->sc_stats.maxcopyout = sc->sc_stats.maxcopyin = 0; #endif } __inline void movepout(from, to, len) u_char *from; __volatile u_char *to; int len; { #ifdef BAHASMCOPY u_short shortd; u_long longd, longd1, longd2, longd3, longd4; if ((len > 3) && ((long)from) & 3) { switch (((long)from) & 3) { case 3: *to = *from++; to += 2; --len; break; case 1: *to = *from++; to += 2; --len; case 2: shortd = *((u_short *)from)++; asm("movepw %0,%1@(0)" : : "d"(shortd), "a"(to)); to += 4; len -= 2; break; default: } while (len >= 32) { longd1 = *((u_long *)from)++; longd2 = *((u_long *)from)++; longd3 = *((u_long *)from)++; longd4 = *((u_long *)from)++; asm("movepl %0,%1@(0)" : : "d"(longd1), "a"(to)); asm("movepl %0,%1@(8)" : : "d"(longd2), "a"(to)); asm("movepl %0,%1@(16)" : : "d"(longd3), "a"(to)); asm("movepl %0,%1@(24)" : : "d"(longd4), "a"(to)); longd1 = *((u_long *)from)++; longd2 = *((u_long *)from)++; longd3 = *((u_long *)from)++; longd4 = *((u_long *)from)++; asm("movepl %0,%1@(32)" : : "d"(longd1), "a"(to)); asm("movepl %0,%1@(40)" : : "d"(longd2), "a"(to)); asm("movepl %0,%1@(48)" : : "d"(longd3), "a"(to)); asm("movepl %0,%1@(56)" : : "d"(longd4), "a"(to)); to += 64; len -= 32; } while (len > 0) { longd = *((u_long *)from)++; asm("movepl %0,%1@(0)" : : "d"(longd), "a"(to)); to += 8; len -= 4; } } #endif while (len > 0) { *to = *from++; to += 2; --len; } } /* * Start output on interface. Get another datagram to send * off the interface queue, and copy it to the * interface before starting the output. * * this assumes that it is called inside a critical section... * XXX hm... does it still? * */ void bah_start(ifp) struct ifnet *ifp; { struct bah_softc *sc; struct mbuf *m,*mp; __volatile u_char *bah_ram_ptr; int len, tlen, offset, s, buffer; #ifdef BAHTIMINGS u_long copystart, lencopy, perbyte; #endif sc = ifp->if_softc; #if defined(BAH_DEBUG) && (BAH_DEBUG > 3) printf("%s: start(0x%x)\n", sc->sc_dev.dv_xname, ifp); #endif if ((ifp->if_flags & IFF_RUNNING) == 0) return; s = splnet(); if (sc->sc_tx_fillcount >= 2) { splx(s); return; } IFQ_DEQUEUE(&ifp->if_snd, m); buffer = sc->sc_tx_act ^ 1; splx(s); if (m == 0) return; #if NBPFILTER > 0 /* * If bpf is listening on this interface, let it * see the packet before we commit it to the wire * * (can't give the copy in A2060 card RAM to bpf, because * that RAM is just accessed as on every other byte) */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m); #endif #ifdef BAH_DEBUG m = m_pullup(m,3); /* gcc does structure padding */ printf("%s: start: filling %ld from %ld to %ld type %ld\n", sc->sc_dev.dv_xname, buffer, mtod(m, u_char *)[0], mtod(m, u_char *)[1], mtod(m, u_char *)[2]); #else m = m_pullup(m, 2); #endif bah_ram_ptr = sc->sc_base->buffers + buffer*512*2; /* write the addresses to RAM and throw them away */ /* * Hardware does this: Yet Another Microsecond Saved. * (btw, timing code says usually 2 microseconds) * bah_ram_ptr[0*2] = mtod(m, u_char *)[0]; */ bah_ram_ptr[1 * 2] = mtod(m, u_char *)[1]; m_adj(m, 2); /* get total length left at this point */ tlen = m->m_pkthdr.len; if (tlen < ARC_MIN_FORBID_LEN) { offset = 256 - tlen; bah_ram_ptr[2 * 2] = offset; } else { bah_ram_ptr[2 * 2] = 0; if (tlen <= ARC_MAX_FORBID_LEN) offset = 255; /* !!! */ else { if (tlen > ARC_MAX_LEN) tlen = ARC_MAX_LEN; offset = 512 - tlen; } bah_ram_ptr[3 * 2] = offset; } bah_ram_ptr += offset * 2; /* lets loop through the mbuf chain */ for (mp = m; mp; mp = mp->m_next) { if ((len = mp->m_len)) { /* YAMS */ #ifdef BAHTIMINGS lencopy = len; copystart = clkread(); #endif movepout(mtod(mp, caddr_t), bah_ram_ptr, len); #ifdef BAHTIMINGS perbyte = 1000 * (clkread() - copystart) / lencopy; sc->sc_stats.mincopyout = ulmin(sc->sc_stats.mincopyout, perbyte); sc->sc_stats.maxcopyout = ulmax(sc->sc_stats.maxcopyout, perbyte); #endif bah_ram_ptr += len*2; } } sc->sc_broadcast[buffer] = (m->m_flags & M_BCAST) != 0; sc->sc_retransmits[buffer] = (m->m_flags & M_BCAST) ? 1 : 5; /* actually transmit the packet */ s = splnet(); if (++sc->sc_tx_fillcount > 1) { /* * We are filled up to the rim. No more bufs for the moment, * please. */ ifp->if_flags |= IFF_OACTIVE; } else { #ifdef BAH_DEBUG printf("%s: start: starting transmitter on buffer %d\n", sc->sc_dev.dv_xname, buffer); #endif /* Transmitter was off, start it */ sc->sc_tx_act = buffer; /* * We still can accept another buf, so don't: * ifp->if_flags |= IFF_OACTIVE; */ sc->sc_intmask |= ARC_TA; sc->sc_base->command = ARC_TX(buffer); sc->sc_base->status = sc->sc_intmask; sc->sc_arccom.ac_if.if_timer = ARCTIMEOUT; #ifdef BAHTIMINGS bcopy((caddr_t)&time, (caddr_t)&(sc->sc_stats.lasttxstart_tv), sizeof(struct timeval)); sc->sc_stats.lasttxstart_mics = clkread(); #endif } splx(s); m_freem(m); /* * After 10 times reading the docs, I realized * that in the case the receiver NAKs the buffer request, * the hardware retries till shutdown. * This is integrated now in the code above. */ return; } void callstart(vsc, dummy) void *vsc, *dummy; { struct bah_softc *sc; sc = (struct bah_softc *)vsc; bah_start(&sc->sc_arccom.ac_if); } __inline void movepin(from, to, len) __volatile u_char *from; u_char *to; int len; { #ifdef BAHASMCOPY unsigned long longd, longd1, longd2, longd3, longd4; ushort shortd; if ((len > 3) && (((long)to) & 3)) { switch (((long)to) & 3) { case 3: *to++ = *from; from += 2; --len; break; case 1: *to++ = *from; from += 2; --len; case 2: asm ("movepw %1@(0),%0": "=d" (shortd) : "a" (from)); *((ushort *)to)++ = shortd; from += 4; len -= 2; break; default: } while (len >= 32) { asm("movepl %1@(0),%0" : "=d"(longd1) : "a" (from)); asm("movepl %1@(8),%0" : "=d"(longd2) : "a" (from)); asm("movepl %1@(16),%0" : "=d"(longd3) : "a" (from)); asm("movepl %1@(24),%0" : "=d"(longd4) : "a" (from)); *((unsigned long *)to)++ = longd1; *((unsigned long *)to)++ = longd2; *((unsigned long *)to)++ = longd3; *((unsigned long *)to)++ = longd4; asm("movepl %1@(32),%0" : "=d"(longd1) : "a" (from)); asm("movepl %1@(40),%0" : "=d"(longd2) : "a" (from)); asm("movepl %1@(48),%0" : "=d"(longd3) : "a" (from)); asm("movepl %1@(56),%0" : "=d"(longd4) : "a" (from)); *((unsigned long *)to)++ = longd1; *((unsigned long *)to)++ = longd2; *((unsigned long *)to)++ = longd3; *((unsigned long *)to)++ = longd4; from += 64; len -= 32; } while (len > 0) { asm("movepl %1@(0),%0" : "=d"(longd) : "a" (from)); *((unsigned long *)to)++ = longd; from += 8; len -= 4; } } #endif /* BAHASMCOPY */ while (len > 0) { *to++ = *from; from += 2; --len; } } /* * Arcnet interface receiver soft interrupt: * get the stuff out of any filled buffer we find. */ void bah_srint(vsc, dummy) void *vsc, *dummy; { struct bah_softc *sc; int buffer, len, len1, amount, offset, s, i, type; u_char __volatile *bah_ram_ptr; struct mbuf *m, *dst, *head; struct arc_header *ah; struct ifnet *ifp; #ifdef BAHTIMINGS u_long copystart, lencopy, perbyte; #endif sc = (struct bah_softc *)vsc; ifp = &sc->sc_arccom.ac_if; head = 0; s = splnet(); buffer = sc->sc_rx_act ^ 1; splx(s); /* Allocate header mbuf */ MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == 0) { /* * in case s.th. goes wrong with mem, drop it * to make sure the receiver can be started again * count it as input error (we dont have any other * detectable) */ ifp->if_ierrors++; goto cleanup; } m->m_pkthdr.rcvif = ifp; /* * Align so that IP packet will be longword aligned. Here we * assume that m_data of new packet is longword aligned. * When implementing PHDS, we might have to change it to 2, * (2*sizeof(ulong) - ARC_HDRNEWLEN)), packet type dependent. */ bah_ram_ptr = sc->sc_base->buffers + buffer*512*2; offset = bah_ram_ptr[2*2]; if (offset) len = 256 - offset; else { offset = bah_ram_ptr[3*2]; len = 512 - offset; } type = bah_ram_ptr[offset*2]; m->m_data += 1 + arc_isphds(type); head = m; ah = mtod(head, struct arc_header *); ah->arc_shost = bah_ram_ptr[0*2]; ah->arc_dhost = bah_ram_ptr[1*2]; m->m_pkthdr.len = len+2; /* whole packet length */ m->m_len = 2; /* mbuf filled with ARCnet addresses */ bah_ram_ptr += offset*2; /* ram buffer continues there */ while (len > 0) { len1 = len; amount = M_TRAILINGSPACE(m); if (amount == 0) { dst = m; MGET(m, M_DONTWAIT, MT_DATA); if (m == 0) { ifp->if_ierrors++; goto cleanup; } if (len1 >= MINCLSIZE) MCLGET(m, M_DONTWAIT); m->m_len = 0; dst->m_next = m; amount = M_TRAILINGSPACE(m); } if (amount < len1) len1 = amount; #ifdef BAHTIMINGS lencopy = len; copystart = clkread(); #endif movepin(bah_ram_ptr, mtod(m, u_char *) + m->m_len, len1); #ifdef BAHTIMINGS perbyte = 1000 * (clkread() - copystart) / lencopy; sc->sc_stats.mincopyin = ulmin(sc->sc_stats.mincopyin, perbyte); sc->sc_stats.maxcopyin = ulmax(sc->sc_stats.maxcopyin, perbyte); #endif m->m_len += len1; bah_ram_ptr += len1*2; len -= len1; } #if NBPFILTER > 0 if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, head); #endif arc_input(&sc->sc_arccom.ac_if, head); /* arc_input has freed it, we dont need to... */ head = NULL; ifp->if_ipackets++; cleanup: if (head != NULL) m_freem(head); /* mark buffer as invalid by source id 0 */ sc->sc_base->buffers[buffer*512*2] = 0; s = splnet(); if (--sc->sc_rx_fillcount == 2 - 1) { /* was off, restart it on buffer just emptied */ sc->sc_rx_act = buffer; sc->sc_intmask |= ARC_RI; /* this also clears the RI flag interrupt: */ sc->sc_base->command = ARC_RXBC(buffer); sc->sc_base->status = sc->sc_intmask; #ifdef BAH_DEBUG printf("%s: srint: restarted rx on buf %ld\n", sc->sc_dev.dv_xname, buffer); #endif } splx(s); } __inline static void bah_tint(sc, isr) struct bah_softc *sc; int isr; { struct ifnet *ifp; int buffer; #ifdef BAHTIMINGS int clknow; #endif ifp = &(sc->sc_arccom.ac_if); buffer = sc->sc_tx_act; /* * retransmit code: * Normal situations first for fast path: * If acknowledgement received ok or broadcast, we're ok. * else if */ if (isr & ARC_TMA || sc->sc_broadcast[buffer]) sc->sc_arccom.ac_if.if_opackets++; #ifdef BAHRETRANSMIT else if (ifp->if_flags & IFF_LINK2 && ifp->if_timer > 0 && --sc->sc_retransmits[buffer] > 0) { /* retransmit same buffer */ sc->sc_base->command = ARC_TX(buffer); return; } #endif else ifp->if_oerrors++; #ifdef BAHTIMINGS clknow = clkread(); sc->sc_stats.minsend = ulmin(sc->sc_stats.minsend, clknow - sc->sc_stats.lasttxstart_mics); sc->sc_stats.maxsend = ulmax(sc->sc_stats.maxsend, clknow - sc->sc_stats.lasttxstart_mics); #endif /* We know we can accept another buffer at this point. */ ifp->if_flags &= ~IFF_OACTIVE; if (--sc->sc_tx_fillcount > 0) { /* * start tx on other buffer. * This also clears the int flag */ buffer ^= 1; sc->sc_tx_act = buffer; /* * already given: * sc->sc_intmask |= ARC_TA; * sc->sc_base->status = sc->sc_intmask; */ sc->sc_base->command = ARC_TX(buffer); /* init watchdog timer */ ifp->if_timer = ARCTIMEOUT; #ifdef BAHTIMINGS bcopy((caddr_t)&time, (caddr_t)&(sc->sc_stats.lasttxstart_tv), sizeof(struct timeval)); sc->sc_stats.lasttxstart_mics = clkread(); #endif #if defined(BAH_DEBUG) && (BAH_DEBUG > 1) printf("%s: tint: starting tx on buffer %d, status 0x%02x\n", sc->sc_dev.dv_xname, buffer, sc->sc_base->status); #endif } else { /* have to disable TX interrupt */ sc->sc_intmask &= ~ARC_TA; sc->sc_base->status = sc->sc_intmask; /* ... and watchdog timer */ ifp->if_timer = 0; #ifdef BAH_DEBUG printf("%s: tint: no more buffers to send, status 0x%02x\n", sc->sc_dev.dv_xname, sc->sc_base->status); #endif } #ifdef BAHSOFTCOPY /* schedule soft int to fill a new buffer for us */ add_sicallback((sifunc_t)callstart, sc, NULL); #else /* call it directly */ callstart(sc, NULL); #endif } /* * Our interrupt routine */ int bahintr(sc) struct bah_softc *sc; { u_char isr, maskedisr; int buffer; time_t newsec; isr = sc->sc_base->status; maskedisr = isr & sc->sc_intmask; if (!maskedisr) return (0); #if defined(BAH_DEBUG) && (BAH_DEBUG>1) printf("%s: intr: status 0x%02x, intmask 0x%02x\n", sc->sc_dev.dv_xname, isr, sc->sc_intmask); #endif if (maskedisr & ARC_POR) { sc->sc_arccom.ac_anaddr = sc->sc_base->dipswitches; sc->sc_base->command = ARC_CLR(CLR_POR); log(LOG_WARNING, "%s: intr: got spurious power on reset int\n", sc->sc_dev.dv_xname); } if (maskedisr & ARC_RECON) { /* * we dont need to: * sc->sc_base->command = ARC_CONF(CONF_LONG); */ sc->sc_base->command = ARC_CLR(CLR_RECONFIG); sc->sc_arccom.ac_if.if_collisions++; /* * If more than 2 seconds per reconfig: * Reset time and counter. * else: * If more than ARC_EXCESSIVE_RECONFIGS reconfigs * since last burst, complain and set treshold for * warnings to ARC_EXCESSIVE_RECONS_REWARN. * * This allows for, e.g., new stations on the cable, or * cable switching as long as it is over after (normally) * 16 seconds. * * XXX TODO: check timeout bits in status word and double * time if necessary. */ newsec = time.tv_sec; if (newsec - sc->sc_recontime > 2 * sc->sc_reconcount) { sc->sc_recontime = newsec; sc->sc_reconcount = 0; sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS; } else if (++sc->sc_reconcount > sc->sc_reconcount_excessive) { sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS_REWARN; log(LOG_WARNING, "%s: excessive token losses, cable problem?\n", sc->sc_dev.dv_xname); sc->sc_recontime = newsec; sc->sc_reconcount = 0; } } if (maskedisr & ARC_RI) { #if defined(BAH_DEBUG) && (BAH_DEBUG > 1) printf("%s: intr: hard rint, act %ld\n", sc->sc_dev.dv_xname, sc->sc_rx_act); #endif buffer = sc->sc_rx_act; /* look if buffer is marked invalid: */ if (sc->sc_base->buffers[buffer*512*2] == 0) { /* invalid marked buffer (or illegally configured sender) */ log(LOG_WARNING, "%s: spurious RX interrupt or sender 0 (ignored)\n", sc->sc_dev.dv_xname); /* * restart receiver on same buffer. */ sc->sc_base->command = ARC_RXBC(buffer); } else if (++sc->sc_rx_fillcount > 1) { sc->sc_intmask &= ~ARC_RI; sc->sc_base->status = sc->sc_intmask; } else { buffer ^= 1; sc->sc_rx_act = buffer; /* * Start receiver on other receive buffer. * This also clears the RI interrupt flag. */ sc->sc_base->command = ARC_RXBC(buffer); /* we are in the RX intr, so mask is ok for RX */ #ifdef BAH_DEBUG printf("%s: started rx for buffer %ld, status 0x%02x\n", sc->sc_dev.dv_xname, sc->sc_rx_act, sc->sc_base->status); #endif } #ifdef BAHSOFTCOPY /* this one starts a soft int to copy out of the hw */ add_sicallback((sifunc_t)bah_srint, sc,NULL); #else /* this one does the copy here */ bah_srint(sc,NULL); #endif } if (maskedisr & ARC_TA) bah_tint(sc, isr); return (1); } /* * Process an ioctl request. * This code needs some work - it looks pretty ugly. */ int bah_ioctl(ifp, command, data) register struct ifnet *ifp; u_long command; caddr_t data; { struct bah_softc *sc; register struct ifaddr *ifa; int s, error; error = 0; sc = ifp->if_softc; ifa = (struct ifaddr *)data; s = splnet(); #if defined(BAH_DEBUG) && (BAH_DEBUG > 2) printf("%s: ioctl() called, cmd = 0x%x\n", sc->sc_dev.dv_xname, command); #endif switch (command) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: bah_init(sc); break; #endif default: bah_init(sc); break; } 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. */ bah_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. */ bah_init(sc); } break; /* Multicast not supported */ default: error = EINVAL; } splx(s); return (error); } /* * watchdog routine for transmitter. * * We need this, because else a receiver whose hardware is alive, but whose * software has not enabled the Receiver, would make our hardware wait forever * Discovered this after 20 times reading the docs. * * Only thing we do is disable transmitter. We'll get an transmit timeout, * and the int handler will have to decide not to retransmit (in case * retransmission is implemented). * * This one assumes being called inside splnet(), and that net >= ipl2 */ void bah_watchdog(ifp) struct ifnet *ifp; { struct bah_softc *sc = ifp->if_softc; sc->sc_base->command = ARC_TXDIS; return; }