/* $NetBSD: if_ae.c,v 1.5 1996/02/24 07:47:36 chopps Exp $ */ /* * Copyright (c) 1995 Bernd Ernesti and Klaus Burkert. 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 Bernd Ernesti, by Klaus * Burkert, by Michael van Elst, and 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 8.1 (Berkeley) 6/10/93 * * This is based on the original LANCE files, as the PCnet-ISA used on * the Ariadne is a LANCE-descendant optimized for the PC-ISA bus. * This causes some modifications, all data that is to go into registers * or to structures (buffer-descriptors, init-block) has to be * byte-swapped. In addition ALL write accesses to the board have to be * WORD or LONG, BYTE-access is prohibited!! */ #include "ae.h" #if NAE > 0 #include "bpfilter.h" /* * AMD 79C960 PCnet-ISA * * This driver will generate and accept tailer encapsulated packets even * though it buys us nothing. The motivation was to avoid incompatibilities * with VAXen, SUNs, and others that handle and benefit from them. * This reasoning is dubious. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #ifdef NS #include #include #endif #if defined(CCITT) && defined(LLC) #include #include extern llc_ctlinput(), cons_rtrequest(); #endif #if NBPFILTER > 0 #include #include #endif #include #include #include #include #include #include /* * Ethernet software status per interface. * * Each interface is referenced by a network interface structure, * ae_if, which the routing code uses to locate the interface. * This structure contains the output queue for the interface, its address, ... */ struct ae_softc { struct device sc_dev; struct isr sc_isr; struct arpcom sc_arpcom; /* common Ethernet structures */ void *sc_base; /* base address of board */ struct aereg1 *sc_r1; /* LANCE registers */ struct aereg2 *sc_r2; /* dual-port RAM */ int sc_rmd; /* predicted next rmd to process */ int sc_tmd; /* next tmd to use */ int sc_no_td; /* number of tmds in use */ } ae_softc[NAE]; /* offsets for: ID, REGS, MEM */ int aestd[] = { 0, 0x0370, 0x8000 }; static u_int16_t revision; int aematch __P((struct device *, void *, void *)); void aeattach __P((struct device *, struct device *, void *)); void aewatchdog __P((int)); void aestop __P((struct ae_softc *)); void aememinit __P((struct ae_softc *)); void aereset __P((struct ae_softc *)); void aeinit __P((struct ae_softc *)); void aestart __P((struct ifnet *)); int aeintr __P((struct ae_softc *)); void aetint __P((struct ae_softc *)); void aerint __P((struct ae_softc *)); void aeread __P((struct ae_softc *, u_char *, int)); static void wcopyfrom __P((char *, char *, int)); static void wcopyto __P((char *, char *, int)); static void wzero __P((char *, int)); int aeput __P((char *, struct mbuf *)); struct mbuf *aeget __P((struct ae_softc *,u_char *, int)); int aeioctl __P((struct ifnet *, u_long, caddr_t)); void aesetladrf __P((struct arpcom *, u_int16_t *)); struct cfdriver aecd = { NULL, "ae", aematch, aeattach, DV_IFNET, sizeof(struct ae_softc) }; int aematch(parent, match, aux) struct device *parent; void *match, *aux; { struct zbus_args *zap; zap = (struct zbus_args *)aux; /* Ariadne ethernet card */ if (zap->manid == 2167 && zap->prodid == 201) return (1); return (0); } /* * Interface exists: make available by filling in network interface * record. System will initialize the interface when it is ready * to accept packets. */ void aeattach(parent, self, aux) struct device *parent, *self; void *aux; { register struct aereg2 *aer2; struct zbus_args *zap; struct ae_softc *sc = (void *)self; struct ifnet *ifp = &sc->sc_arpcom.ac_if; unsigned long ser; int s = splhigh (); zap =(struct zbus_args *)aux; /* * Make config msgs look nicer. */ printf("\n"); sc->sc_base = zap->va; sc->sc_r1 = (struct aereg1 *)(aestd[1] + (int)zap->va); aer2 = sc->sc_r2 = (struct aereg2 *)(aestd[2] + (int)zap->va); /* * Serial number for board is used as host ID. */ ser = (unsigned long) zap->serno; /* * Manufacturer decides the 3 first bytes, i.e. ethernet vendor ID. */ sc->sc_arpcom.ac_enaddr[0] = 0x00; sc->sc_arpcom.ac_enaddr[1] = 0x60; sc->sc_arpcom.ac_enaddr[2] = 0x30; sc->sc_arpcom.ac_enaddr[3] = (ser >> 16) & 0xff; sc->sc_arpcom.ac_enaddr[4] = (ser >> 8) & 0xff; sc->sc_arpcom.ac_enaddr[5] = ser & 0xff; printf("%s: hardware address %s 32K", sc->sc_dev.dv_xname, ether_sprintf(sc->sc_arpcom.ac_enaddr)); aestop(sc); delay(100); /* get the chip version of the lance chip */ sc->sc_r1->aer1_rap = 0x5900; revision = ((sc->sc_r1->aer1_rdp >> 4) -2); printf(" chip-revision: B%x\n", revision); splx (s); ifp->if_unit = sc->sc_dev.dv_unit; ifp->if_name = aecd.cd_name; ifp->if_ioctl = aeioctl; ifp->if_watchdog = aewatchdog; ifp->if_output = ether_output; ifp->if_start = aestart; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; if_attach(ifp); ether_ifattach(ifp); #if NBPFILTER > 0 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif sc->sc_isr.isr_intr = aeintr; sc->sc_isr.isr_arg = sc; sc->sc_isr.isr_ipl = 2; add_isr (&sc->sc_isr); return; } void aewatchdog(unit) short unit; { struct ae_softc *sc = aecd.cd_devs[unit]; log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); ++sc->sc_arpcom.ac_if.if_oerrors; aereset(sc); } void aestop(sc) struct ae_softc *sc; { sc->sc_r1->aer1_rap = AE_CSR0; sc->sc_r1->aer1_rdp = AE_STOP; } /* * Set up the initialization block and the descriptor rings. */ void aememinit(sc) register struct ae_softc *sc; { register struct ifnet *ifp = &sc->sc_arpcom.ac_if; /* * This structure is referenced from the CARD's/PCnet-ISA's point * of view, thus the 0x8000 address which is the buffer RAM area * of the Ariadne card. This pointer is manipulated * with the PCnet-ISA's view of memory and NOT the Amiga's. FYI. */ register struct aereg2 *aemem = (struct aereg2 *) 0x8000; register struct aereg2 *aer2 = sc->sc_r2; register int i; #if NBPFILTER > 0 if (ifp->if_flags & IFF_PROMISC) /* set the promiscuous bit */ aer2->aer2_mode = AE_MODE | AE_PROM; else #endif aer2->aer2_mode = AE_MODE; /* you know: no BYTE access.... */ aer2->aer2_padr[0] = (sc->sc_arpcom.ac_enaddr[0] << 8) | sc->sc_arpcom.ac_enaddr[1]; aer2->aer2_padr[1] = (sc->sc_arpcom.ac_enaddr[2] << 8) | sc->sc_arpcom.ac_enaddr[3]; aer2->aer2_padr[2] = (sc->sc_arpcom.ac_enaddr[4] << 8) | sc->sc_arpcom.ac_enaddr[5]; aesetladrf(&sc->sc_arpcom, aer2->aer2_ladrf); sc->sc_no_td = sc->sc_tmd = sc->sc_rmd = 0; aer2->aer2_rlen = SWAP(AE_RLEN); aer2->aer2_rdra = SWAP((int)aemem->aer2_rmd); aer2->aer2_tlen = SWAP(AE_TLEN); aer2->aer2_tdra = SWAP((int)aemem->aer2_tmd); for (i = 0; i < AERBUF; i++) { aer2->aer2_rmd[i].rmd0 = SWAP((int)aemem->aer2_rbuf[i]); aer2->aer2_rmd[i].rmd1 = AE_OWN; aer2->aer2_rmd[i].rmd2 = SWAP(-ETHER_MAX_LEN); aer2->aer2_rmd[i].rmd3 = 0; } for (i = 0; i < AETBUF; i++) { aer2->aer2_tmd[i].tmd0 = SWAP((int)aemem->aer2_tbuf[i]); aer2->aer2_tmd[i].tmd1 = 0; aer2->aer2_tmd[i].tmd2 = 0; aer2->aer2_tmd[i].tmd3 = 0; } } void aereset(sc) struct ae_softc *sc; { int s; s = splnet(); aeinit(sc); splx(s); } /* * Initialization of interface; set up initialization block * and transmit/receive descriptor rings. */ void aeinit(sc) struct ae_softc *sc; { register struct aereg1 *aer1 = sc->sc_r1; register struct ifnet *ifp = &sc->sc_arpcom.ac_if; register struct aereg2 *aemem = (struct aereg2 *) 0x8000; register int timo = 0; volatile int dummy; aestop(sc); delay(100); dummy = aer1->aer1_reset; /* Reset PCNet-ISA */ aememinit(sc); /* Give LANCE the physical address of its init block. */ aer1->aer1_rap = AE_CSR1; aer1->aer1_rdp = SWAP((int)&aemem->aer2_mode); aer1->aer1_rap = AE_CSR2; aer1->aer1_rdp = 0; /* * re-program LEDs to match meaning used on the Ariadne board */ aer1->aer1_rap = 0x0500; aer1->aer1_idp = 0x9000; aer1->aer1_rap = 0x0600; aer1->aer1_idp = 0x8100; aer1->aer1_rap = 0x0700; aer1->aer1_idp = 0x8400; /* * you can `ifconfig (link0|-link0) ae0' to get the following * behaviour: * -link0 enable autoselect between 10Base-T (UTP) and 10Base2 (BNC) * if an active 10Base-T line is connected then 10Base-T * is used otherwise 10Base2. * this is the default behaviour, so there is no need to set * -link0 when you want autoselect. * link0 -link1 disable autoselect. enable BNC. * link0 link1 disable autoselect. enable UTP. */ if (!(ifp->if_flags & IFF_LINK0)) { /* enable autoselect */ aer1->aer1_rap = 0x0200; aer1->aer1_idp = 0x0200; } else { /* disable autoselect */ aer1->aer1_rap = 0x0200; aer1->aer1_idp = 0x0000; if (!(ifp->if_flags & IFF_LINK1)) { /* enable BNC */ sc->sc_r2->aer2_mode = 0x0000; } else { /* enable UTP */ sc->sc_r2->aer2_mode = 0x8000; } } /* Try to initialize the LANCE. */ delay(100); aer1->aer1_rap = AE_CSR0; aer1->aer1_rdp = AE_INIT; /* Wait for initialization to finish. */ do { if (++timo == 10000) { printf("%s: card failed to initialize\n", sc->sc_dev.dv_xname); break; } } while ((aer1->aer1_rdp & AE_IDON) == 0); /* Start the LANCE. */ aer1->aer1_rap = AE_CSR0; aer1->aer1_rdp = AE_STRT | AE_INEA | AE_IDON; ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; ifp->if_timer = 0; aestart(ifp); } #define AENEXTTMP \ if (++bix == AETBUF) bix = 0, tmd = sc->sc_r2->aer2_tmd; else ++tmd /* * Start output on interface. Get another datagram to send * off of the interface queue, and copy it to the interface * before starting the output. */ void aestart(ifp) struct ifnet *ifp; { register struct ae_softc *sc = aecd.cd_devs[ifp->if_unit]; register int bix; register struct aetmd *tmd; register struct mbuf *m; int len; if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) return; bix = sc->sc_tmd; tmd = &sc->sc_r2->aer2_tmd[bix]; for (;;) { if (sc->sc_no_td >= AETBUF) { ifp->if_flags |= IFF_OACTIVE; break; } IF_DEQUEUE(&ifp->if_snd, m); if (m == 0) break; ++sc->sc_no_td; #if NBPFILTER > 0 if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m); #endif sc->sc_r1->aer1_rdp = AE_TINT | AE_INEA; len = aeput(sc->sc_r2->aer2_tbuf[bix], m); #ifdef AEDEBUG if (len > ETHER_MAX_LEN) printf("packet length %d\n", len); #endif ifp->if_timer = 5; tmd->tmd1 = AE_OWN | AE_STP | AE_ENP; tmd->tmd2 = SWAP(-len); tmd->tmd3 = 0; sc->sc_r1->aer1_rdp = AE_INEA | AE_TDMD; AENEXTTMP; } sc->sc_tmd = bix; } int aeintr(sc) register struct ae_softc *sc; { register struct aereg1 *aer1; register struct ifnet *ifp = &sc->sc_arpcom.ac_if; register u_int16_t stat; /* if not even initialized, don't do anything further.. */ if (sc->sc_base == 0) return (0); aer1 = sc->sc_r1; stat = aer1->aer1_rdp; if ((stat & AE_INTR) == 0) return (0); aer1->aer1_rdp = (stat & (AE_INEA | AE_BABL | AE_MISS | AE_MERR | AE_RINT | AE_TINT | AE_IDON)); if (stat & AE_SERR) { if (stat & AE_MERR) { printf("%s: memory error\n", sc->sc_dev.dv_xname); aereset(sc); return (1); } if (stat & AE_BABL) { printf("%s: babble\n", sc->sc_dev.dv_xname); ifp->if_oerrors++; } #if 0 if (stat & AE_CERR) { printf("%s: collision error\n", sc->sc_dev.dv_xname); ifp->if_collisions++; } #endif if (stat & AE_MISS) { printf("%s: missed packet\n", sc->sc_dev.dv_xname); ifp->if_ierrors++; } aer1->aer1_rdp = AE_BABL | AE_CERR | AE_MISS | AE_INEA; } if ((stat & AE_RXON) == 0) { printf("%s: receiver disabled\n", sc->sc_dev.dv_xname); ifp->if_ierrors++; aereset(sc); return (1); } if ((stat & AE_TXON) == 0) { printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname); ifp->if_oerrors++; aereset(sc); return (1); } if (stat & AE_RINT) { /* Reset watchdog timer. */ ifp->if_timer = 0; aerint(sc); } if (stat & AE_TINT) { /* Reset watchdog timer. */ ifp->if_timer = 0; aetint(sc); } return (1); } /* * Ethernet interface transmitter interrupt. * Start another output if more data to send. */ void aetint(sc) struct ae_softc *sc; { register int bix = (sc->sc_tmd - sc->sc_no_td + AETBUF) % AETBUF; struct aetmd *tmd = &sc->sc_r2->aer2_tmd[bix]; struct ifnet *ifp = &sc->sc_arpcom.ac_if; if (tmd->tmd1 & AE_OWN) { #ifdef AEDEBUG printf("%s: extra tint\n", sc->sc_dev.dv_xname); #endif return; } ifp->if_flags &= ~IFF_OACTIVE; do { if (sc->sc_no_td <= 0) break; ifp->if_opackets++; --sc->sc_no_td; if (tmd->tmd1 & AE_ERR) { if (tmd->tmd3 & AE_TBUFF) printf("%s: transmit buffer error\n", sc->sc_dev.dv_xname); if (tmd->tmd3 & AE_UFLO) printf("%s: underflow\n", sc->sc_dev.dv_xname); if (tmd->tmd3 & (AE_TBUFF | AE_UFLO)) { aereset(sc); return; } if (tmd->tmd3 & AE_LCAR) printf("%s: lost carrier\n", sc->sc_dev.dv_xname); if (tmd->tmd3 & AE_LCOL) { printf("%s: late collision\n", sc->sc_dev.dv_xname); ifp->if_collisions++; } if (tmd->tmd3 & AE_RTRY) { printf("%s: excessive collisions, tdr %d\n", sc->sc_dev.dv_xname, tmd->tmd3 & AE_TDR_MASK); ifp->if_collisions += 16; } } else if (tmd->tmd1 & AE_ONE) { ifp->if_collisions++; } else if (tmd->tmd1 & AE_MORE) { /* Real number is unknown. */ ifp->if_collisions += 2; } AENEXTTMP; } while ((tmd->tmd1 & AE_OWN) == 0); aestart(ifp); if (sc->sc_no_td == 0) ifp->if_timer = 0; } #define AENEXTRMP \ if (++bix == AERBUF) bix = 0, rmd = sc->sc_r2->aer2_rmd; else ++rmd /* * Ethernet interface receiver interrupt. * If input error just drop packet. * Decapsulate packet based on type and pass to type specific * higher-level input routine. */ void aerint(sc) struct ae_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; register int bix = sc->sc_rmd; register struct aermd *rmd = &sc->sc_r2->aer2_rmd[bix]; /* * Out of sync with hardware, should never happen? */ if (rmd->rmd1 & AE_OWN) { #ifdef AEDEBUG printf("%s: extra rint\n", sc->sc_dev.dv_xname); #endif return; } /* * Process all buffers with valid data */ do { sc->sc_r1->aer1_rdp = AE_RINT | AE_INEA; if (rmd->rmd1 & (AE_FRAM | AE_OFLO | AE_CRC | AE_RBUFF)) { ifp->if_ierrors++; if ((rmd->rmd1 & (AE_FRAM | AE_OFLO | AE_ENP)) == (AE_FRAM | AE_ENP)) printf("%s: framing error\n", sc->sc_dev.dv_xname); if ((rmd->rmd1 & (AE_OFLO | AE_ENP)) == AE_OFLO) printf("%s: overflow\n", sc->sc_dev.dv_xname); if ((rmd->rmd1 & (AE_CRC | AE_OFLO | AE_ENP)) == (AE_CRC | AE_ENP)) printf("%s: crc mismatch\n", sc->sc_dev.dv_xname); if (rmd->rmd1 & AE_RBUFF) printf("%s: receive buffer error\n", sc->sc_dev.dv_xname); } else if ((rmd->rmd1 & (AE_STP | AE_ENP)) != (AE_STP | AE_ENP)) { do { rmd->rmd3 = 0; rmd->rmd1 = AE_OWN; AENEXTRMP; } while ((rmd->rmd1 & (AE_OWN | AE_ERR | AE_STP | AE_ENP)) == 0); sc->sc_rmd = bix; printf("%s: chained buffer\n", sc->sc_dev.dv_xname); if ((rmd->rmd1 & (AE_OWN | AE_ERR | AE_STP | AE_ENP)) != AE_ENP) { aereset(sc); return; } } else aeread(sc, sc->sc_r2->aer2_rbuf[bix], SWAP(rmd->rmd3) - 4); rmd->rmd1 = AE_OWN; rmd->rmd2 = SWAP(-ETHER_MAX_LEN); rmd->rmd3 = 0; AENEXTRMP; } while ((rmd->rmd1 & AE_OWN) == 0); sc->sc_rmd = bix; } void aeread(sc, buf, len) register struct ae_softc *sc; u_char *buf; int len; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; struct mbuf *m; struct ether_header *eh; if (len <= sizeof(struct ether_header) || len > ETHER_MAX_LEN) { printf("%s: invalid packet size %d; dropping\n", sc->sc_dev.dv_xname, len); ifp->if_ierrors++; return; } /* Pull packet off interface. */ m = aeget(sc, buf, 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 filter listening on this interface. * If so, hand off the raw packet to bpf, which must deal with * trailers in its own way. */ if (ifp->if_bpf) { bpf_mtap(ifp->if_bpf, m); /* * 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) && (eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */ bcmp(eh->ether_dhost, sc->sc_arpcom.ac_enaddr, sizeof(eh->ether_dhost)) != 0) { m_freem(m); return; } } #endif /* We assume that the header fit entirely in one mbuf. */ m_adj(m, sizeof(struct ether_header)); ether_input(ifp, eh, m); } /* * Here come the two replacements for bcopy() and bzero() as * WORD-access for writing to the board is absolutely required! * They could use some tuning as this is time-critical (copying * packet-data) and should be processed as fast as possible. * * Thanks to Michael van Elst for pointing me to the problems * that kept the 1.3 code from running under NetBSD current * although it did mystically under 1.0 ... */ #define isodd(p) (((size_t)(p)) & 1) #define align(p) ((ushort *)(((size_t)(p)) & ~1)) /* * the first function copies WORD-aligned from the source to * an arbitrary destination. It assumes that the CPU can handle * mis-aligned writes to the destination itself. */ static void wcopyfrom(a1, a2, length) /* bcopy() word-wise */ char *a1, *a2; int length; { ushort i, *b1, *b2; if (length > 0 && isodd(a1)) { b1 = align(a1); *a2 = *b1 & 0x00ff; /* copy first byte with word access */ ++a2; ++b1; --length; } else b1 = (ushort *)a1; b2 = (ushort *)a2; i = length / 2; while(i--) /* copy all words */ *b2++ = *b1++; if (length & 0x0001) /* copy trailing byte */ a2[length-1] = *b1 >> 8; } /* * the second function copies WORD-aligned from an arbitrary * source to the destination. It assumes that the CPU can handle * mis-aligned reads from the source itself. */ static void wcopyto(a1, a2, length) /* bcopy() word-wise */ char *a1, *a2; int length; { ushort i, *b1, *b2; if (length > 0 && isodd(a2)) { b2 = align(a2); i = (*b2 & 0xff00) | (*a1 & 0x00ff); /* copy first byte with word access */ *b2 = i; ++a1; ++b2; --length; } else b2 = (ushort *)a2; b1 = (ushort *)a1; i = length / 2; while(i--) /* copy all words */ *b2++ = *b1++; if (length & 0x0001) { i = (*b2 & 0x00ff) | (*b1 & 0xff00); /* copy trailing byte */ *b2 = i; } } static void wzero(a1, length) /* bzero() word-wise */ char *a1; int length; { ushort i, *b1; /* * Is the destination word-aligned? * If not, handle the leading byte... */ if((length > 0) && ((size_t)a1 & 1)) { b1 = (ushort *)((size_t)a1 & ~1); *b1 &= 0xff00; --length; ++a1; } /* * Perform the main zeroing word-wise... */ b1 = (ushort *)a1; i = length / 2; while(i--) *b1++ = 0; /* * Do we have to handle a trailing byte? */ if (length & 0x0001) *b1 &= 0x00ff; } /* * Routine to copy from mbuf chain to transmit * buffer in board local memory. */ int aeput(buffer, m) register char *buffer; register struct mbuf *m; { register struct mbuf *n; register int len = 0, tlen = 0; for (; m; m = n) { len = m->m_len; if (len == 0) { MFREE(m, n); continue; } wcopyto(mtod(m, char *), buffer, len); buffer += len; tlen += len; MFREE(m, n); } if (tlen < ETHER_MIN_LEN) { wzero(buffer, ETHER_MIN_LEN - tlen); tlen = ETHER_MIN_LEN; } return(tlen); } /* * Routine to copy from board local memory into mbufs. */ struct mbuf * aeget(sc, buffer, totlen) struct ae_softc *sc; u_char *buffer; int 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 = &sc->sc_arpcom.ac_if; 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) len = MCLBYTES; } m->m_len = len = min(totlen, len); wcopyfrom((caddr_t)buffer, mtod(m, caddr_t), len); buffer += len; totlen -= len; *mp = m; mp = &m->m_next; } return (top); } /* * Process an ioctl request. */ int aeioctl(ifp, cmd, data) register struct ifnet *ifp; u_long cmd; caddr_t data; { struct ae_softc *sc = aecd.cd_devs[ifp->if_unit]; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; s = splnet(); switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: aeinit(sc); arp_ifinit(&sc->sc_arpcom, 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 *)(sc->sc_arpcom.ac_enaddr); else wcopyto(ina->x_host.c_host, sc->sc_arpcom.ac_enaddr, sizeof(sc->sc_arpcom.ac_enaddr)); aeinit(sc); /* does ae_setaddr() */ break; } #endif default: aeinit(sc); break; } break; #if defined(CCITT) && defined(LLC) case SIOCSIFCONF_X25: ifp->if_flags |= IFF_UP; ifa->ifa_rtrequest = (void (*)())cons_rtrequest; /* XXX */ error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); if (error == 0) aeinit(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. */ aestop(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. */ aeinit(sc); } else { /* * Reset the interface to pick up changes in any other * flags that affect hardware registers. */ aeinit(sc); } break; case SIOCADDMULTI: case SIOCDELMULTI: error = (cmd == SIOCADDMULTI) ? ether_addmulti(ifr, &sc->sc_arpcom): ether_delmulti(ifr, &sc->sc_arpcom); if (error == ENETRESET) { /* * Multicast list has changed; set the hardware filter * accordingly. */ aereset(sc); error = 0; } break; default: error = EINVAL; break; } splx(s); return (error); } /* * Set up the logical address filter. */ void aesetladrf(ac, af) struct arpcom *ac; u_int16_t *af; { struct ifnet *ifp = &ac->ac_if; struct ether_multi *enm; register u_char *cp, c; register u_int32_t crc; register int i, 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 (bcmp(enm->enm_addrlo, enm->enm_addrhi, sizeof(enm->enm_addrlo)) != 0) { /* * 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;) { c = *cp++; for (i = 8; --i >= 0;) { if ((crc & 0x01) ^ (c & 0x01)) { crc >>= 1; crc ^= 0xedb88320; } else crc >>= 1; c >>= 1; } } /* Just want the 6 most significant bits. */ crc >>= 26; /* Turn on the corresponding bit in the filter. */ af[crc >> 4] |= 1 << SWAP(crc & 0x1f); 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 /* NAE > 0 */