/* $OpenBSD: if_lmc.c,v 1.25 2011/07/07 20:42:56 henning Exp $ */ /* $NetBSD: if_lmc.c,v 1.1 1999/03/25 03:32:43 explorer Exp $ */ /*- * Copyright (c) 1997-1999 LAN Media Corporation (LMC) * All rights reserved. www.lanmedia.com * * This code is written by Michael Graff for LMC. * The code is derived from permitted modifications to software created * by Matt Thomas (matt@3am-software.com). * * 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 marketing or advertising materials mentioning features or * use of this software must display the following acknowledgement: * This product includes software developed by LAN Media Corporation * and its contributors. * 4. Neither the name of LAN Media Corporation 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 LAN MEDIA CORPORATION 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) 1994-1997 Matt Thomas (matt@3am-software.com) * 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. 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. */ /* * LMC1200 (DS1) & LMC5245 (DS3) LED definitions * led0 yellow = far-end link is in Red alarm condition * led1 blue = received an Alarm Indication signal (upstream failure) * led2 Green = power to adapter, Gate Array loaded & driver attached * led3 red = Loss of Signal (LOS) or out of frame (OOF) conditions * detected on T3 receive signal * * LMC1000 (SSI) & LMC5200 (HSSI) LED definitions * led0 Green = power to adapter, Gate Array loaded & driver attached * led1 Green = DSR and DTR and RTS and CTS are set (CA, TA for LMC5200) * led2 Green = Cable detected (Green indicates non-loopback mode for LMC5200) * led3 red = No timing is available from the cable or the on-board * frequency generator. (ST not available for LMC5200) */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #endif #include #include #include #include #include #include #include #include /* * This module supports * the DEC 21140A pass 2.2 PCI Fast Ethernet Controller. */ static ifnet_ret_t lmc_ifstart_one(struct ifnet *ifp); static ifnet_ret_t lmc_ifstart(struct ifnet *ifp); static struct mbuf *lmc_txput(lmc_softc_t * const sc, struct mbuf *m); static void lmc_rx_intr(lmc_softc_t * const sc); static void lmc_watchdog(struct ifnet *ifp); static void lmc_ifup(lmc_softc_t * const sc); static void lmc_ifdown(lmc_softc_t * const sc); /* * Code the read the SROM and MII bit streams (I2C) */ static inline void lmc_delay_300ns(lmc_softc_t * const sc) { int idx; for (idx = (300 / 33) + 1; idx > 0; idx--) (void)LMC_CSR_READ(sc, csr_busmode); } #define EMIT \ do { \ LMC_CSR_WRITE(sc, csr_srom_mii, csr); \ lmc_delay_300ns(sc); \ } while (0) static inline void lmc_srom_idle(lmc_softc_t * const sc) { unsigned bit, csr; csr = SROMSEL ; EMIT; csr = SROMSEL | SROMRD; EMIT; csr ^= SROMCS; EMIT; csr ^= SROMCLKON; EMIT; /* * Write 25 cycles of 0 which will force the SROM to be idle. */ for (bit = 3 + SROM_BITWIDTH + 16; bit > 0; bit--) { csr ^= SROMCLKOFF; EMIT; /* clock low; data not valid */ csr ^= SROMCLKON; EMIT; /* clock high; data valid */ } csr ^= SROMCLKOFF; EMIT; csr ^= SROMCS; EMIT; csr = 0; EMIT; } static void lmc_srom_read(lmc_softc_t * const sc) { unsigned idx; const unsigned bitwidth = SROM_BITWIDTH; const unsigned cmdmask = (SROMCMD_RD << bitwidth); const unsigned msb = 1 << (bitwidth + 3 - 1); unsigned lastidx = (1 << bitwidth) - 1; lmc_srom_idle(sc); for (idx = 0; idx <= lastidx; idx++) { unsigned lastbit, data, bits, bit, csr; csr = SROMSEL ; EMIT; csr = SROMSEL | SROMRD; EMIT; csr ^= SROMCSON; EMIT; csr ^= SROMCLKON; EMIT; lastbit = 0; for (bits = idx|cmdmask, bit = bitwidth + 3 ; bit > 0 ; bit--, bits <<= 1) { const unsigned thisbit = bits & msb; csr ^= SROMCLKOFF; EMIT; /* clock L data invalid */ if (thisbit != lastbit) { csr ^= SROMDOUT; EMIT;/* clock L invert data */ } else { EMIT; } csr ^= SROMCLKON; EMIT; /* clock H data valid */ lastbit = thisbit; } csr ^= SROMCLKOFF; EMIT; for (data = 0, bits = 0; bits < 16; bits++) { data <<= 1; csr ^= SROMCLKON; EMIT; /* clock H data valid */ data |= LMC_CSR_READ(sc, csr_srom_mii) & SROMDIN ? 1 : 0; csr ^= SROMCLKOFF; EMIT; /* clock L data invalid */ } sc->lmc_rombuf[idx*2] = data & 0xFF; sc->lmc_rombuf[idx*2+1] = data >> 8; csr = SROMSEL | SROMRD; EMIT; csr = 0; EMIT; } lmc_srom_idle(sc); } #define MII_EMIT do { LMC_CSR_WRITE(sc, csr_srom_mii, csr); lmc_delay_300ns(sc); } while (0) static inline void lmc_mii_writebits(lmc_softc_t * const sc, unsigned data, unsigned bits) { unsigned msb = 1 << (bits - 1); unsigned csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK); unsigned lastbit = (csr & MII_DOUT) ? msb : 0; csr |= MII_WR; MII_EMIT; /* clock low; assert write */ for (; bits > 0; bits--, data <<= 1) { const unsigned thisbit = data & msb; if (thisbit != lastbit) { csr ^= MII_DOUT; MII_EMIT; /* clock low; invert data */ } csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */ lastbit = thisbit; csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */ } } static void lmc_mii_turnaround(lmc_softc_t * const sc, u_int32_t cmd) { u_int32_t csr; csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK); if (cmd == MII_WRCMD) { csr |= MII_DOUT; MII_EMIT; /* clock low; change data */ csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */ csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */ csr ^= MII_DOUT; MII_EMIT; /* clock low; change data */ } else { csr |= MII_RD; MII_EMIT; /* clock low; switch to read */ } csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */ csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */ } static u_int32_t lmc_mii_readbits(lmc_softc_t * const sc) { u_int32_t data; u_int32_t csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK); int idx; for (idx = 0, data = 0; idx < 16; idx++) { data <<= 1; /* this is NOOP on the first pass through */ csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */ if (LMC_CSR_READ(sc, csr_srom_mii) & MII_DIN) data |= 1; csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */ } csr ^= MII_RD; MII_EMIT; /* clock low; turn off read */ return data; } u_int32_t lmc_mii_readreg(lmc_softc_t * const sc, u_int32_t devaddr, u_int32_t regno) { u_int32_t csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK); u_int32_t data; csr &= ~(MII_RD|MII_CLK); MII_EMIT; lmc_mii_writebits(sc, MII_PREAMBLE, 32); lmc_mii_writebits(sc, MII_RDCMD, 8); lmc_mii_writebits(sc, devaddr, 5); lmc_mii_writebits(sc, regno, 5); lmc_mii_turnaround(sc, MII_RDCMD); data = lmc_mii_readbits(sc); return (data); } void lmc_mii_writereg(lmc_softc_t * const sc, u_int32_t devaddr, u_int32_t regno, u_int32_t data) { u_int32_t csr; csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK); csr &= ~(MII_RD|MII_CLK); MII_EMIT; lmc_mii_writebits(sc, MII_PREAMBLE, 32); lmc_mii_writebits(sc, MII_WRCMD, 8); lmc_mii_writebits(sc, devaddr, 5); lmc_mii_writebits(sc, regno, 5); lmc_mii_turnaround(sc, MII_WRCMD); lmc_mii_writebits(sc, data, 16); } int lmc_read_macaddr(lmc_softc_t * const sc) { lmc_srom_read(sc); bcopy(sc->lmc_rombuf + 20, sc->lmc_enaddr, 6); return 0; } /* * Check to make certain there is a signal from the modem, and flicker * lights as needed. */ static void lmc_watchdog(struct ifnet *ifp) { lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp); u_int32_t ostatus; u_int32_t link_status; u_int32_t ticks; /* * Make sure the tx jabber and rx watchdog are off, * and the transmit and receive processes are running. */ LMC_CSR_WRITE (sc, csr_15, 0x00000011); sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN; LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode); /* Is the transmit clock still available? */ ticks = LMC_CSR_READ (sc, csr_gp_timer); ticks = 0x0000ffff - (ticks & 0x0000ffff); if (ticks == 0) { /* no clock found ? */ if (sc->tx_clockState != 0) { sc->tx_clockState = 0; if (sc->lmc_cardtype == LMC_CARDTYPE_SSI) lmc_led_on (sc, LMC_MII16_LED3); /* ON red */ } else if (sc->tx_clockState == 0) { sc->tx_clockState = 1; if (sc->lmc_cardtype == LMC_CARDTYPE_SSI) lmc_led_off (sc, LMC_MII16_LED3); /* OFF red */ } } link_status = sc->lmc_media->get_link_status(sc); ostatus = ((sc->lmc_flags & LMC_MODEMOK) == LMC_MODEMOK); /* * hardware level link lost, but the interface is marked as up. * Mark it as down. */ if (link_status == LMC_LINK_DOWN && ostatus) { printf(LMC_PRINTF_FMT ": physical link down\n", LMC_PRINTF_ARGS); sc->lmc_flags &= ~LMC_MODEMOK; if (sc->lmc_cardtype == LMC_CARDTYPE_DS3 || sc->lmc_cardtype == LMC_CARDTYPE_T1) lmc_led_on (sc, LMC_DS3_LED3 | LMC_DS3_LED2); /* turn on red LED */ else { lmc_led_off (sc, LMC_MII16_LED1); lmc_led_on (sc, LMC_MII16_LED0); if (sc->lmc_timing == LMC_CTL_CLOCK_SOURCE_EXT) lmc_led_on (sc, LMC_MII16_LED3); } } /* * hardware link is up, but the interface is marked as down. * Bring it back up again. */ if (link_status != LMC_LINK_DOWN && !ostatus) { printf(LMC_PRINTF_FMT ": physical link up\n", LMC_PRINTF_ARGS); if (sc->lmc_flags & LMC_IFUP) lmc_ifup(sc); sc->lmc_flags |= LMC_MODEMOK; if (sc->lmc_cardtype == LMC_CARDTYPE_DS3 || sc->lmc_cardtype == LMC_CARDTYPE_T1) { sc->lmc_miireg16 |= LMC_DS3_LED3; lmc_led_off (sc, LMC_DS3_LED3); /* turn off red LED */ lmc_led_on (sc, LMC_DS3_LED2); } else { lmc_led_on (sc, LMC_MII16_LED0 | LMC_MII16_LED1 | LMC_MII16_LED2); if (sc->lmc_timing != LMC_CTL_CLOCK_SOURCE_EXT) lmc_led_off (sc, LMC_MII16_LED3); } return; } /* Call media specific watchdog functions */ sc->lmc_media->watchdog(sc); /* * remember the timer value */ ticks = LMC_CSR_READ(sc, csr_gp_timer); LMC_CSR_WRITE(sc, csr_gp_timer, 0xffffffffUL); sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff); ifp->if_timer = 1; } /* * Mark the interface as "up" and enable TX/RX and TX/RX interrupts. * This also does a full software reset. */ static void lmc_ifup(lmc_softc_t * const sc) { sc->lmc_if.if_timer = 0; lmc_dec_reset(sc); lmc_reset(sc); sc->lmc_media->set_link_status(sc, LMC_LINK_UP); sc->lmc_media->set_status(sc, NULL); sc->lmc_flags |= LMC_IFUP; /* * for DS3 & DS1 adapters light the green light, led2 */ if (sc->lmc_cardtype == LMC_CARDTYPE_DS3 || sc->lmc_cardtype == LMC_CARDTYPE_T1) lmc_led_on (sc, LMC_MII16_LED2); else lmc_led_on (sc, LMC_MII16_LED0 | LMC_MII16_LED2); /* * select what interrupts we want to get */ sc->lmc_intrmask |= (TULIP_STS_NORMALINTR | TULIP_STS_RXINTR | TULIP_STS_RXNOBUF | TULIP_STS_TXINTR | TULIP_STS_ABNRMLINTR | TULIP_STS_SYSERROR | TULIP_STS_TXSTOPPED | TULIP_STS_TXUNDERFLOW | TULIP_STS_RXSTOPPED ); LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask); sc->lmc_cmdmode |= TULIP_CMD_TXRUN; sc->lmc_cmdmode |= TULIP_CMD_RXRUN; LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode); sc->lmc_if.if_timer = 1; } /* * Mark the interface as "down" and disable TX/RX and TX/RX interrupts. * This is done by performing a full reset on the interface. */ static void lmc_ifdown(lmc_softc_t * const sc) { sc->lmc_if.if_timer = 0; sc->lmc_flags &= ~LMC_IFUP; sc->lmc_media->set_link_status(sc, LMC_LINK_DOWN); lmc_led_off(sc, LMC_MII16_LED_ALL); lmc_dec_reset(sc); lmc_reset(sc); sc->lmc_media->set_status(sc, NULL); } static void lmc_rx_intr(lmc_softc_t * const sc) { lmc_ringinfo_t * const ri = &sc->lmc_rxinfo; struct ifnet * const ifp = &sc->lmc_if; u_int32_t status; int fillok = 1; sc->lmc_rxtick++; for (;;) { lmc_desc_t *eop = ri->ri_nextin; int total_len = 0, last_offset = 0; struct mbuf *ms = NULL, *me = NULL; int accept = 0; bus_dmamap_t map; int error; if (fillok && IF_LEN(&sc->lmc_rxq) < LMC_RXQ_TARGET) goto queue_mbuf; /* * If the TULIP has no descriptors, there can't be any receive * descriptors to process. */ if (eop == ri->ri_nextout) break; /* * 90% of the packets will fit in one descriptor. So we * optimize for that case. */ LMC_RXDESC_POSTSYNC(sc, eop, sizeof(*eop)); status = letoh32(((volatile lmc_desc_t *) eop)->d_status); if ((status & (TULIP_DSTS_OWNER|TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) == (TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) { IF_DEQUEUE(&sc->lmc_rxq, ms); me = ms; } else { /* * If still owned by the TULIP, don't touch it. */ if (status & TULIP_DSTS_OWNER) break; /* * It is possible (though improbable unless the * BIG_PACKET support is enabled or MCLBYTES < 1518) * for a received packet to cross more than one * receive descriptor. */ while ((status & TULIP_DSTS_RxLASTDESC) == 0) { if (++eop == ri->ri_last) eop = ri->ri_first; LMC_RXDESC_POSTSYNC(sc, eop, sizeof(*eop)); status = letoh32(((volatile lmc_desc_t *) eop)->d_status); if (eop == ri->ri_nextout || (status & TULIP_DSTS_OWNER)) { return; } total_len++; } /* * Dequeue the first buffer for the start of the * packet. Hopefully this will be the only one we * need to dequeue. However, if the packet consumed * multiple descriptors, then we need to dequeue * those buffers and chain to the starting mbuf. * All buffers but the last buffer have the same * length so we can set that now. (we add to * last_offset instead of multiplying since we * normally won't go into the loop and thereby * saving a ourselves from doing a multiplication * by 0 in the normal case). */ IF_DEQUEUE(&sc->lmc_rxq, ms); for (me = ms; total_len > 0; total_len--) { map = LMC_GETCTX(me, bus_dmamap_t); LMC_RXMAP_POSTSYNC(sc, map); bus_dmamap_unload(sc->lmc_dmatag, map); sc->lmc_rxmaps[sc->lmc_rxmaps_free++] = map; #if defined(DIAGNOSTIC) LMC_SETCTX(me, NULL); #endif me->m_len = LMC_RX_BUFLEN; last_offset += LMC_RX_BUFLEN; IF_DEQUEUE(&sc->lmc_rxq, me->m_next); me = me->m_next; } } /* * Now get the size of received packet (minus the CRC). */ total_len = ((status >> 16) & 0x7FFF); if (sc->ictl.crc_length == 16) total_len -= 2; else total_len -= 4; if ((sc->lmc_flags & LMC_RXIGNORE) == 0 && ((status & LMC_DSTS_ERRSUM) == 0 #ifdef BIG_PACKET || (total_len <= sc->lmc_if.if_mtu + PPP_HEADER_LEN && (status & TULIP_DSTS_RxOVERFLOW) == 0) #endif )) { map = LMC_GETCTX(me, bus_dmamap_t); bus_dmamap_sync(sc->lmc_dmatag, map, 0, me->m_len, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); bus_dmamap_unload(sc->lmc_dmatag, map); sc->lmc_rxmaps[sc->lmc_rxmaps_free++] = map; #if defined(DIAGNOSTIC) LMC_SETCTX(me, NULL); #endif me->m_len = total_len - last_offset; #if NBPFILTER > 0 if (sc->lmc_bpf != NULL) { if (me == ms) LMC_BPF_TAP(sc, mtod(ms, caddr_t), total_len, BPF_DIRECTION_IN); else LMC_BPF_MTAP(sc, ms, BPF_DIRECTION_IN); } #endif sc->lmc_flags |= LMC_RXACT; accept = 1; } else { ifp->if_ierrors++; if (status & TULIP_DSTS_RxOVERFLOW) { sc->lmc_dot3stats.dot3StatsInternalMacReceiveErrors++; } map = LMC_GETCTX(me, bus_dmamap_t); bus_dmamap_unload(sc->lmc_dmatag, map); sc->lmc_rxmaps[sc->lmc_rxmaps_free++] = map; #if defined(DIAGNOSTIC) LMC_SETCTX(me, NULL); #endif } ifp->if_ipackets++; if (++eop == ri->ri_last) eop = ri->ri_first; ri->ri_nextin = eop; queue_mbuf: /* * Either we are priming the TULIP with mbufs (m == NULL) * or we are about to accept an mbuf for the upper layers * so we need to allocate an mbuf to replace it. If we * can't replace it, send up it anyways. This may cause * us to drop packets in the future but that's better than * being caught in livelock. * * Note that if this packet crossed multiple descriptors * we don't even try to reallocate all the mbufs here. * Instead we rely on the test of the beginning of * the loop to refill for the extra consumed mbufs. */ if (accept || ms == NULL) { struct mbuf *m0; MGETHDR(m0, M_DONTWAIT, MT_DATA); if (m0 != NULL) { MCLGET(m0, M_DONTWAIT); if ((m0->m_flags & M_EXT) == 0) { m_freem(m0); m0 = NULL; } } if (accept) { ms->m_pkthdr.len = total_len; ms->m_pkthdr.rcvif = ifp; sppp_input(ifp, ms); } ms = m0; } if (ms == NULL) { /* * Couldn't allocate a new buffer. Don't bother * trying to replenish the receive queue. */ fillok = 0; sc->lmc_flags |= LMC_RXBUFSLOW; continue; } /* * Now give the buffer(s) to the TULIP and save in our * receive queue. */ do { u_int32_t ctl; lmc_desc_t * const nextout = ri->ri_nextout; if (sc->lmc_rxmaps_free > 0) { map = sc->lmc_rxmaps[--sc->lmc_rxmaps_free]; } else { m_freem(ms); sc->lmc_flags |= LMC_RXBUFSLOW; #if defined(LMC_DEBUG) sc->lmc_dbg.dbg_rxlowbufs++; #endif break; } LMC_SETCTX(ms, map); error = bus_dmamap_load(sc->lmc_dmatag, map, mtod(ms, void *), LMC_RX_BUFLEN, NULL, BUS_DMA_NOWAIT); if (error) { printf(LMC_PRINTF_FMT ": unable to load rx map, " "error = %d\n", LMC_PRINTF_ARGS, error); panic("lmc_rx_intr"); /* XXX */ } ctl = letoh32(nextout->d_ctl); /* For some weird reason we lose TULIP_DFLAG_ENDRING */ if ((nextout+1) == ri->ri_last) ctl = LMC_CTL(LMC_CTL_FLGS(ctl)| TULIP_DFLAG_ENDRING, 0, 0); nextout->d_addr1 = htole32(map->dm_segs[0].ds_addr); if (map->dm_nsegs == 2) { nextout->d_addr2 = htole32(map->dm_segs[1].ds_addr); nextout->d_ctl = htole32(LMC_CTL(LMC_CTL_FLGS(ctl), map->dm_segs[0].ds_len, map->dm_segs[1].ds_len)); } else { nextout->d_addr2 = 0; nextout->d_ctl = htole32(LMC_CTL(LMC_CTL_FLGS(ctl), map->dm_segs[0].ds_len, 0)); } LMC_RXDESC_POSTSYNC(sc, nextout, sizeof(*nextout)); ri->ri_nextout->d_status = htole32(TULIP_DSTS_OWNER); LMC_RXDESC_POSTSYNC(sc, nextout, sizeof(u_int32_t)); if (++ri->ri_nextout == ri->ri_last) ri->ri_nextout = ri->ri_first; me = ms->m_next; ms->m_next = NULL; IF_ENQUEUE(&sc->lmc_rxq, ms); } while ((ms = me) != NULL); if (IF_LEN(&sc->lmc_rxq) >= LMC_RXQ_TARGET) sc->lmc_flags &= ~LMC_RXBUFSLOW; } } static int lmc_tx_intr(lmc_softc_t * const sc) { lmc_ringinfo_t * const ri = &sc->lmc_txinfo; struct mbuf *m; int xmits = 0; int descs = 0; u_int32_t d_status; sc->lmc_txtick++; while (ri->ri_free < ri->ri_max) { u_int32_t flag; LMC_TXDESC_POSTSYNC(sc, ri->ri_nextin, sizeof(*ri->ri_nextin)); d_status = letoh32(((volatile lmc_desc_t *) ri->ri_nextin)->d_status); if (d_status & TULIP_DSTS_OWNER) break; flag = LMC_CTL_FLGS(letoh32(ri->ri_nextin->d_ctl)); if (flag & TULIP_DFLAG_TxLASTSEG) { IF_DEQUEUE(&sc->lmc_txq, m); if (m != NULL) { bus_dmamap_t map = LMC_GETCTX(m, bus_dmamap_t); LMC_TXMAP_POSTSYNC(sc, map); sc->lmc_txmaps[sc->lmc_txmaps_free++] = map; #if NBPFILTER > 0 if (sc->lmc_bpf != NULL) LMC_BPF_MTAP(sc, m, BPF_DIRECTION_OUT); #endif m_freem(m); #if defined(LMC_DEBUG) } else { printf(LMC_PRINTF_FMT ": tx_intr: failed to dequeue mbuf?!?\n", LMC_PRINTF_ARGS); #endif } xmits++; if (d_status & LMC_DSTS_ERRSUM) { sc->lmc_if.if_oerrors++; if (d_status & TULIP_DSTS_TxUNDERFLOW) { sc->lmc_dot3stats.dot3StatsInternalTransmitUnderflows++; } } else { if (d_status & TULIP_DSTS_TxDEFERRED) { sc->lmc_dot3stats.dot3StatsDeferredTransmissions++; } } } if (++ri->ri_nextin == ri->ri_last) ri->ri_nextin = ri->ri_first; ri->ri_free++; descs++; sc->lmc_if.if_flags &= ~IFF_OACTIVE; } /* * If nothing left to transmit, disable the timer. * Else if progress, reset the timer back to 2 ticks. */ sc->lmc_if.if_opackets += xmits; return descs; } static void lmc_print_abnormal_interrupt (lmc_softc_t * const sc, u_int32_t csr) { printf(LMC_PRINTF_FMT ": Abnormal interrupt\n", LMC_PRINTF_ARGS); } static const char * const lmc_system_errors[] = { "parity error", "master abort", "target abort", "reserved #3", "reserved #4", "reserved #5", "reserved #6", "reserved #7", }; static void lmc_intr_handler(lmc_softc_t * const sc, int *progress_p) { u_int32_t csr; while ((csr = LMC_CSR_READ(sc, csr_status)) & sc->lmc_intrmask) { *progress_p = 1; LMC_CSR_WRITE(sc, csr_status, csr); if (csr & TULIP_STS_SYSERROR) { sc->lmc_last_system_error = (csr & TULIP_STS_ERRORMASK) >> TULIP_STS_ERR_SHIFT; if (sc->lmc_flags & LMC_NOMESSAGES) { sc->lmc_flags |= LMC_SYSTEMERROR; } else { printf(LMC_PRINTF_FMT ": system error: %s\n", LMC_PRINTF_ARGS, lmc_system_errors[sc->lmc_last_system_error]); } sc->lmc_flags |= LMC_NEEDRESET; sc->lmc_system_errors++; break; } if (csr & (TULIP_STS_RXINTR | TULIP_STS_RXNOBUF)) { u_int32_t misses = LMC_CSR_READ(sc, csr_missed_frames); if (csr & TULIP_STS_RXNOBUF) sc->lmc_dot3stats.dot3StatsMissedFrames += misses & 0xFFFF; /* * Pass 2.[012] of the 21140A-A[CDE] may hang and/or corrupt data * on receive overflows. */ if ((misses & 0x0FFE0000) && (sc->lmc_features & LMC_HAVE_RXBADOVRFLW)) { sc->lmc_dot3stats.dot3StatsInternalMacReceiveErrors++; /* * Stop the receiver process and spin until it's stopped. * Tell rx_intr to drop the packets it dequeues. */ LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode & ~TULIP_CMD_RXRUN); while ((LMC_CSR_READ(sc, csr_status) & TULIP_STS_RXSTOPPED) == 0) ; LMC_CSR_WRITE(sc, csr_status, TULIP_STS_RXSTOPPED); sc->lmc_flags |= LMC_RXIGNORE; } lmc_rx_intr(sc); if (sc->lmc_flags & LMC_RXIGNORE) { /* * Restart the receiver. */ sc->lmc_flags &= ~LMC_RXIGNORE; LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode); } } if (csr & TULIP_STS_ABNRMLINTR) { u_int32_t tmp = csr & sc->lmc_intrmask & ~(TULIP_STS_NORMALINTR|TULIP_STS_ABNRMLINTR); if (csr & TULIP_STS_TXUNDERFLOW) { if ((sc->lmc_cmdmode & TULIP_CMD_THRESHOLDCTL) != TULIP_CMD_THRSHLD160) { sc->lmc_cmdmode += TULIP_CMD_THRSHLD96; sc->lmc_flags |= LMC_NEWTXTHRESH; } else if (sc->lmc_features & LMC_HAVE_STOREFWD) { sc->lmc_cmdmode |= TULIP_CMD_STOREFWD; sc->lmc_flags |= LMC_NEWTXTHRESH; } } if (sc->lmc_flags & LMC_NOMESSAGES) { sc->lmc_statusbits |= tmp; } else { lmc_print_abnormal_interrupt(sc, tmp); sc->lmc_flags |= LMC_NOMESSAGES; } LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode); } if (csr & TULIP_STS_TXINTR) lmc_tx_intr(sc); if (sc->lmc_flags & LMC_WANTTXSTART) lmc_ifstart(&sc->lmc_if); } } lmc_intrfunc_t lmc_intr_normal(void *arg) { lmc_softc_t * sc = (lmc_softc_t *) arg; int progress = 0; lmc_intr_handler(sc, &progress); #if !defined(LMC_VOID_INTRFUNC) return progress; #endif } static struct mbuf * lmc_mbuf_compress(struct mbuf *m) { struct mbuf *m0; #if MCLBYTES >= LMC_MTU + PPP_HEADER_LEN && !defined(BIG_PACKET) MGETHDR(m0, M_DONTWAIT, MT_DATA); if (m0 != NULL) { if (m->m_pkthdr.len > MHLEN) { MCLGET(m0, M_DONTWAIT); if ((m0->m_flags & M_EXT) == 0) { m_freem(m); m_freem(m0); return NULL; } } m_copydata(m, 0, m->m_pkthdr.len, mtod(m0, caddr_t)); m0->m_pkthdr.len = m0->m_len = m->m_pkthdr.len; } #else int mlen = MHLEN; int len = m->m_pkthdr.len; struct mbuf **mp = &m0; while (len > 0) { if (mlen == MHLEN) { MGETHDR(*mp, M_DONTWAIT, MT_DATA); } else { MGET(*mp, M_DONTWAIT, MT_DATA); } if (*mp == NULL) { m_freem(m0); m0 = NULL; break; } if (len > MLEN) { MCLGET(*mp, M_DONTWAIT); if (((*mp)->m_flags & M_EXT) == 0) { m_freem(m0); m0 = NULL; break; } (*mp)->m_len = (len <= MCLBYTES ? len : MCLBYTES); } else { (*mp)->m_len = (len <= mlen ? len : mlen); } m_copydata(m, m->m_pkthdr.len - len, (*mp)->m_len, mtod((*mp), caddr_t)); len -= (*mp)->m_len; mp = &(*mp)->m_next; mlen = MLEN; } #endif m_freem(m); return m0; } /* * queue the mbuf handed to us for the interface. If we cannot * queue it, return the mbuf. Return NULL if the mbuf was queued. */ static struct mbuf * lmc_txput(lmc_softc_t * const sc, struct mbuf *m) { lmc_ringinfo_t * const ri = &sc->lmc_txinfo; lmc_desc_t *eop, *nextout; int segcnt, free; u_int32_t d_status, ctl; bus_dmamap_t map; int error; #if defined(LMC_DEBUG) if ((sc->lmc_cmdmode & TULIP_CMD_TXRUN) == 0) { printf(LMC_PRINTF_FMT ": txput: tx not running\n", LMC_PRINTF_ARGS); sc->lmc_flags |= LMC_WANTTXSTART; goto finish; } #endif /* * Now we try to fill in our transmit descriptors. This is * a bit reminiscent of going on the Ark two by two * since each descriptor for the TULIP can describe * two buffers. So we advance through packet filling * each of the two entries at a time to fill each * descriptor. Clear the first and last segment bits * in each descriptor (actually just clear everything * but the end-of-ring or chain bits) to make sure * we don't get messed up by previously sent packets. * * We may fail to put the entire packet on the ring if * there is either not enough ring entries free or if the * packet has more than MAX_TXSEG segments. In the former * case we will just wait for the ring to empty. In the * latter case we have to recopy. */ d_status = 0; eop = nextout = ri->ri_nextout; segcnt = 0; free = ri->ri_free; /* * Reclaim some DMA maps from if we are out. */ if (sc->lmc_txmaps_free == 0) { #if defined(LMC_DEBUG) sc->lmc_dbg.dbg_no_txmaps++; #endif free += lmc_tx_intr(sc); } if (sc->lmc_txmaps_free > 0) { map = sc->lmc_txmaps[sc->lmc_txmaps_free-1]; } else { sc->lmc_flags |= LMC_WANTTXSTART; #if defined(LMC_DEBUG) sc->lmc_dbg.dbg_txput_finishes[1]++; #endif goto finish; } error = bus_dmamap_load_mbuf(sc->lmc_dmatag, map, m, BUS_DMA_NOWAIT); if (error != 0) { if (error == EFBIG) { /* * The packet exceeds the number of transmit buffer * entries that we can use for one packet, so we have * to recopy it into one mbuf and then try again. */ m = lmc_mbuf_compress(m); if (m == NULL) { #if defined(LMC_DEBUG) sc->lmc_dbg.dbg_txput_finishes[2]++; #endif goto finish; } error = bus_dmamap_load_mbuf(sc->lmc_dmatag, map, m, BUS_DMA_NOWAIT); } if (error != 0) { printf(LMC_PRINTF_FMT ": unable to load tx map, " "error = %d\n", LMC_PRINTF_ARGS, error); #if defined(LMC_DEBUG) sc->lmc_dbg.dbg_txput_finishes[3]++; #endif goto finish; } } if ((free -= (map->dm_nsegs + 1) / 2) <= 0 /* * See if there's any unclaimed space in the transmit ring. */ && (free += lmc_tx_intr(sc)) <= 0) { /* * There's no more room but since nothing * has been committed at this point, just * show output is active, put back the * mbuf and return. */ sc->lmc_flags |= LMC_WANTTXSTART; #if defined(LMC_DEBUG) sc->lmc_dbg.dbg_txput_finishes[4]++; #endif bus_dmamap_unload(sc->lmc_dmatag, map); goto finish; } for (; map->dm_nsegs - segcnt > 1; segcnt += 2) { int flg; eop = nextout; flg = LMC_CTL_FLGS(letoh32(eop->d_ctl)); flg &= TULIP_DFLAG_ENDRING; flg |= TULIP_DFLAG_TxNOPADDING; if (sc->ictl.crc_length == 16) flg |= TULIP_DFLAG_TxHASCRC; eop->d_status = htole32(d_status); eop->d_addr1 = htole32(map->dm_segs[segcnt].ds_addr); eop->d_addr2 = htole32(map->dm_segs[segcnt+1].ds_addr); eop->d_ctl = htole32(LMC_CTL(flg, map->dm_segs[segcnt].ds_len, map->dm_segs[segcnt+1].ds_len)); d_status = TULIP_DSTS_OWNER; if (++nextout == ri->ri_last) nextout = ri->ri_first; } if (segcnt < map->dm_nsegs) { int flg; eop = nextout; flg = LMC_CTL_FLGS(letoh32(eop->d_ctl)); flg &= TULIP_DFLAG_ENDRING; flg |= TULIP_DFLAG_TxNOPADDING; if (sc->ictl.crc_length == 16) flg |= TULIP_DFLAG_TxHASCRC; eop->d_status = htole32(d_status); eop->d_addr1 = htole32(map->dm_segs[segcnt].ds_addr); eop->d_addr2 = 0; eop->d_ctl = htole32(LMC_CTL(flg, map->dm_segs[segcnt].ds_len, 0)); if (++nextout == ri->ri_last) nextout = ri->ri_first; } LMC_TXMAP_PRESYNC(sc, map); LMC_SETCTX(m, map); map = NULL; --sc->lmc_txmaps_free; /* commit to using the dmamap */ /* * The descriptors have been filled in. Now get ready * to transmit. */ IF_ENQUEUE(&sc->lmc_txq, m); m = NULL; /* * Make sure the next descriptor after this packet is owned * by us since it may have been set up above if we ran out * of room in the ring. */ nextout->d_status = 0; LMC_TXDESC_PRESYNC(sc, nextout, sizeof(u_int32_t)); /* * Mark the last and first segments, indicate we want a transmit * complete interrupt, and tell it to transmit! */ ctl = letoh32(eop->d_ctl); eop->d_ctl = htole32(LMC_CTL( LMC_CTL_FLGS(ctl)|TULIP_DFLAG_TxLASTSEG|TULIP_DFLAG_TxWANTINTR, LMC_CTL_LEN1(ctl), LMC_CTL_LEN2(ctl))); /* * Note that ri->ri_nextout is still the start of the packet * and until we set the OWNER bit, we can still back out of * everything we have done. */ ctl = letoh32(ri->ri_nextout->d_ctl); ri->ri_nextout->d_ctl = htole32(LMC_CTL( LMC_CTL_FLGS(ctl)|TULIP_DFLAG_TxFIRSTSEG, LMC_CTL_LEN1(ctl), LMC_CTL_LEN2(ctl))); if (eop < ri->ri_nextout) { LMC_TXDESC_PRESYNC(sc, ri->ri_nextout, (caddr_t) ri->ri_last - (caddr_t) ri->ri_nextout); LMC_TXDESC_PRESYNC(sc, ri->ri_first, (caddr_t) (eop + 1) - (caddr_t) ri->ri_first); } else { LMC_TXDESC_PRESYNC(sc, ri->ri_nextout, (caddr_t) (eop + 1) - (caddr_t) ri->ri_nextout); } ri->ri_nextout->d_status = htole32(TULIP_DSTS_OWNER); LMC_TXDESC_PRESYNC(sc, ri->ri_nextout, sizeof(u_int32_t)); LMC_CSR_WRITE(sc, csr_txpoll, 1); /* * This advances the ring for us. */ ri->ri_nextout = nextout; ri->ri_free = free; /* * switch back to the single queueing ifstart. */ sc->lmc_flags &= ~LMC_WANTTXSTART; sc->lmc_if.if_start = lmc_ifstart_one; /* * If we want a txstart, there must be not enough space in the * transmit ring. So we want to enable transmit done interrupts * so we can immediately reclaim some space. When the transmit * interrupt is posted, the interrupt handler will call tx_intr * to reclaim space and then txstart (since WANTTXSTART is set). * txstart will move the packet into the transmit ring and clear * WANTTXSTART thereby causing TXINTR to be cleared. */ finish: if (sc->lmc_flags & LMC_WANTTXSTART) { sc->lmc_if.if_flags |= IFF_OACTIVE; sc->lmc_if.if_start = lmc_ifstart; } return m; } /* * This routine is entered at splnet() */ static int lmc_ifioctl(struct ifnet * ifp, ioctl_cmd_t cmd, caddr_t data) { lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp); int s; struct proc *p = curproc; int error = 0; struct ifreq *ifr = (struct ifreq *)data; u_int32_t new_state; u_int32_t old_state; lmc_ctl_t ctl; s = LMC_RAISESPL(); switch (cmd) { case LMCIOCGINFO: error = copyout(&sc->ictl, ifr->ifr_data, sizeof(lmc_ctl_t)); goto out; break; case LMCIOCSINFO: error = suser(p, 0); if (error) goto out; error = copyin(ifr->ifr_data, &ctl, sizeof(lmc_ctl_t)); if (error != 0) goto out; sc->lmc_media->set_status(sc, &ctl); goto out; break; case SIOCSIFMTU: /* * Don't allow the MTU to get larger than we can handle */ if (ifr->ifr_mtu > LMC_MTU) { error = EINVAL; goto out; } else { ifp->if_mtu = ifr->ifr_mtu; } break; } /* * call the sppp ioctl layer */ error = sppp_ioctl(ifp, cmd, data); if (error != 0) goto out; /* * If we are transitioning from up to down or down to up, call * our init routine. */ new_state = ifp->if_flags & IFF_UP; old_state = sc->lmc_flags & LMC_IFUP; if (new_state && !old_state) lmc_ifup(sc); else if (!new_state && old_state) lmc_ifdown(sc); out: LMC_RESTORESPL(s); return error; } /* * These routines gets called at device spl (from sppp_output). */ static ifnet_ret_t lmc_ifstart(struct ifnet * const ifp) { lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp); struct mbuf *m, *m0; if (sc->lmc_flags & LMC_IFUP) { while (sppp_isempty(ifp) == 0) { m = sppp_pick(ifp); if (m == NULL) break; if ((m = lmc_txput(sc, m)) != NULL) break; m0 = sppp_dequeue(ifp); #if defined(LMC_DEBUG) if (m0 != m) printf("lmc_ifstart: mbuf mismatch!\n"); #endif } LMC_CSR_WRITE(sc, csr_txpoll, 1); } } static ifnet_ret_t lmc_ifstart_one(struct ifnet * const ifp) { lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp); struct mbuf *m, *m0; if ((sc->lmc_flags & LMC_IFUP) && (sppp_isempty(ifp) == 0)) { m = sppp_pick(ifp); if ((m = lmc_txput(sc, m)) != NULL) return; m0 = sppp_dequeue(ifp); #if defined(LMC_DEBUG) if (m0 != m) printf("lmc_ifstart: mbuf mismatch!\n"); #endif LMC_CSR_WRITE(sc, csr_txpoll, 1); } } /* * Set up the OS interface magic and attach to the operating system * network services. */ void lmc_attach(lmc_softc_t * const sc) { struct ifnet * const ifp = &sc->lmc_if; ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST; ifp->if_ioctl = lmc_ifioctl; ifp->if_start = lmc_ifstart; ifp->if_watchdog = lmc_watchdog; ifp->if_timer = 1; ifp->if_mtu = LMC_MTU; IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); IFQ_SET_READY(&ifp->if_snd); if_attach(ifp); if_alloc_sadl(ifp); sppp_attach((struct ifnet *)&sc->lmc_sppp); sc->lmc_sppp.pp_flags = PP_CISCO | PP_KEEPALIVE; sc->lmc_sppp.pp_framebytes = 3; #if NBPFILTER > 0 LMC_BPF_ATTACH(sc); #endif /* * turn off those LEDs... */ sc->lmc_miireg16 |= LMC_MII16_LED_ALL; /* * for DS3 & DS1 adapters light the green light, led2 */ if (sc->lmc_cardtype == LMC_CARDTYPE_DS3 || sc->lmc_cardtype == LMC_CARDTYPE_T1) lmc_led_on (sc, LMC_MII16_LED2); else lmc_led_on (sc, LMC_MII16_LED0 | LMC_MII16_LED2); } void lmc_initring(lmc_softc_t * const sc, lmc_ringinfo_t * const ri, lmc_desc_t *descs, int ndescs) { ri->ri_max = ndescs; ri->ri_first = descs; ri->ri_last = ri->ri_first + ri->ri_max; bzero((caddr_t) ri->ri_first, sizeof(ri->ri_first[0]) * ri->ri_max); ri->ri_last[-1].d_ctl = htole32(LMC_CTL(TULIP_DFLAG_ENDRING, 0, 0)); }