/* $NetBSD: am7990.c,v 1.68 2005/12/11 12:21:25 christos Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause AND BSD-3-Clause * * 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. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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) { if_t 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 (if_getflags(ifp) & 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) { if_t 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) { if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); #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); if_input(ifp, m); LE_LOCK(sc); } else if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); } sc->sc_last_rd = bix; } static void am7990_tint(struct lance_softc *sc) { if_t 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; if_setdrvflagbits(ifp, 0, 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) if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); if (tmd.tmd3 & LE_T3_RTRY) { #ifdef LEDEBUG if_printf(ifp, "excessive collisions, tdr %d\n", tmd.tmd3 & LE_T3_TDR_MASK); #endif if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 16); } if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); } else { if (tmd.tmd1_bits & LE_T1_ONE) if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); else if (tmd.tmd1_bits & LE_T1_MORE) /* Real number is unknown. */ if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 2); if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); } 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; if_t ifp = sc->sc_ifp; uint16_t isr; LE_LOCK(sc); if (sc->sc_hwintr && (*sc->sc_hwintr)(sc) == -1) { if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 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 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); } #if 0 if (isr & LE_C0_CERR) { if_printf(ifp, "collision error\n"); if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); } #endif if (isr & LE_C0_MISS) { #ifdef LEDEBUG if_printf(ifp, "missed packet\n"); #endif if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); } 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"); if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); lance_init_locked(sc); LE_UNLOCK(sc); return; } if ((isr & LE_C0_TXON) == 0) { if_printf(ifp, "transmitter disabled\n"); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 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 (!if_sendq_empty(ifp)) 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) { if_t ifp = sc->sc_ifp; struct letmd tmd; struct mbuf *m; int bix, enq, len, rp; LE_LOCK_ASSERT(sc, MA_OWNED); if ((if_getdrvflags(ifp) & (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 && !if_sendq_empty(ifp);) { rp = LE_TMDADDR(sc, bix); (*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd)); if (tmd.tmd1_bits & LE_T1_OWN) { if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0); if_printf(ifp, "missing buffer, no_td = %d, last_td = %d\n", sc->sc_no_td, sc->sc_last_td); } m = if_dequeue(ifp); if (m == NULL) 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) { if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0); 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) { if_t 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) { if_t 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 */