/* * Copyright (c) 1997, 1998, 1999 * Bill Paul . 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 Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD * 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. * * $FreeBSD: src/sys/pci/if_al.c,v 1.4.2.3 1999/10/10 19:43:05 wpaul Exp $ */ /* * ADMtek AL981 Comet fast ethernet PCI NIC driver. Datasheets for * the AL981 are available from http://www.admtek.com.tw. * * Written by Bill Paul * Electrical Engineering Department * Columbia University, New York City */ /* * The ADMtek AL981 Comet is still another DEC 21x4x clone. It's * a reasonably close copy of the tulip, except for the receiver filter * programming. Where the DEC chip has a special setup frame that * needs to be downloaded into the transmit DMA engine, the ADMtek chip * has physical address and multicast address registers. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #endif #include /* for vtophys */ #include /* for vtophys */ #include /* for DELAY */ #include #include #include #include #include /* Enable workaround for small transmitter bug. */ #define AL_TX_STALL_WAR #define AL_USEIOSPACE /* #define AL_BACKGROUND_AUTONEG */ #include #ifndef lint static const char rcsid[] = "$FreeBSD: src/sys/pci/if_al.c,v 1.4.2.3 1999/10/10 19:43:05 wpaul Exp $"; #endif /* * Various supported device vendors/types and their names. */ static struct al_type al_devs[] = { { AL_VENDORID, AL_DEVICEID_AL981, "ADMtek AL981 10/100BaseTX" }, { AL_VENDORID, AL_DEVICEID_AN985, "ADMtek AN985 10/100BaseTX" }, { 0, 0, NULL } }; /* * Various supported PHY vendors/types and their names. Note that * this driver will work with pretty much any MII-compliant PHY, * so failure to positively identify the chip is not a fatal error. */ static struct al_type al_phys[] = { { TI_PHY_VENDORID, TI_PHY_10BT, "" }, { TI_PHY_VENDORID, TI_PHY_100VGPMI, "" }, { NS_PHY_VENDORID, NS_PHY_83840A, ""}, { LEVEL1_PHY_VENDORID, LEVEL1_PHY_LXT970, "" }, { INTEL_PHY_VENDORID, INTEL_PHY_82555, "" }, { SEEQ_PHY_VENDORID, SEEQ_PHY_80220, "" }, { 0, 0, "" } }; static unsigned long al_count = 0; static const char *al_probe __P((pcici_t, pcidi_t)); static void al_attach __P((pcici_t, int)); static int al_newbuf __P((struct al_softc *, struct al_chain_onefrag *)); static int al_encap __P((struct al_softc *, struct al_chain *, struct mbuf *)); static void al_rxeof __P((struct al_softc *)); static void al_rxeoc __P((struct al_softc *)); static void al_txeof __P((struct al_softc *)); static void al_txeoc __P((struct al_softc *)); static void al_intr __P((void *)); static void al_start __P((struct ifnet *)); static int al_ioctl __P((struct ifnet *, u_long, caddr_t)); static void al_init __P((void *)); static void al_stop __P((struct al_softc *)); static void al_watchdog __P((struct ifnet *)); static void al_shutdown __P((int, void *)); static int al_ifmedia_upd __P((struct ifnet *)); static void al_ifmedia_sts __P((struct ifnet *, struct ifmediareq *)); static void al_delay __P((struct al_softc *)); static void al_eeprom_idle __P((struct al_softc *)); static void al_eeprom_putbyte __P((struct al_softc *, int)); static void al_eeprom_getword __P((struct al_softc *, int, u_int16_t *)); static void al_read_eeprom __P((struct al_softc *, caddr_t, int, int, int)); static void al_mii_writebit __P((struct al_softc *, int)); static int al_mii_readbit __P((struct al_softc *)); static void al_mii_sync __P((struct al_softc *)); static void al_mii_send __P((struct al_softc *, u_int32_t, int)); static int al_mii_readreg __P((struct al_softc *, struct al_mii_frame *)); static int al_mii_writereg __P((struct al_softc *, struct al_mii_frame *)); static u_int16_t al_phy_readreg __P((struct al_softc *, int)); static void al_phy_writereg __P((struct al_softc *, int, int)); static void al_autoneg_xmit __P((struct al_softc *)); static void al_autoneg_mii __P((struct al_softc *, int, int)); static void al_setmode_mii __P((struct al_softc *, int)); static void al_getmode_mii __P((struct al_softc *)); static u_int32_t al_calchash __P((caddr_t)); static void al_setmulti __P((struct al_softc *)); static void al_reset __P((struct al_softc *)); static int al_list_rx_init __P((struct al_softc *)); static int al_list_tx_init __P((struct al_softc *)); #define AL_SETBIT(sc, reg, x) \ CSR_WRITE_4(sc, reg, \ CSR_READ_4(sc, reg) | x) #define AL_CLRBIT(sc, reg, x) \ CSR_WRITE_4(sc, reg, \ CSR_READ_4(sc, reg) & ~x) #define SIO_SET(x) \ CSR_WRITE_4(sc, AL_SIO, \ CSR_READ_4(sc, AL_SIO) | x) #define SIO_CLR(x) \ CSR_WRITE_4(sc, AL_SIO, \ CSR_READ_4(sc, AL_SIO) & ~x) static void al_delay(sc) struct al_softc *sc; { int idx; for (idx = (300 / 33) + 1; idx > 0; idx--) CSR_READ_4(sc, AL_BUSCTL); } static void al_eeprom_idle(sc) struct al_softc *sc; { register int i; CSR_WRITE_4(sc, AL_SIO, AL_SIO_EESEL); al_delay(sc); AL_SETBIT(sc, AL_SIO, AL_SIO_ROMCTL_READ); al_delay(sc); AL_SETBIT(sc, AL_SIO, AL_SIO_EE_CS); al_delay(sc); AL_SETBIT(sc, AL_SIO, AL_SIO_EE_CLK); al_delay(sc); for (i = 0; i < 25; i++) { AL_CLRBIT(sc, AL_SIO, AL_SIO_EE_CLK); al_delay(sc); AL_SETBIT(sc, AL_SIO, AL_SIO_EE_CLK); al_delay(sc); } AL_CLRBIT(sc, AL_SIO, AL_SIO_EE_CLK); al_delay(sc); AL_CLRBIT(sc, AL_SIO, AL_SIO_EE_CS); al_delay(sc); CSR_WRITE_4(sc, AL_SIO, 0x00000000); return; } /* * Send a read command and address to the EEPROM, check for ACK. */ static void al_eeprom_putbyte(sc, addr) struct al_softc *sc; int addr; { register int d, i; if (sc->al_info->al_did == AL_DEVICEID_AN985) d = addr | (AL_EECMD_READ << 2); else d = addr | AL_EECMD_READ; /* * Feed in each bit and stobe the clock. */ for (i = 0x400; i; i >>= 1) { if (d & i) { SIO_SET(AL_SIO_EE_DATAIN); } else { SIO_CLR(AL_SIO_EE_DATAIN); } al_delay(sc); SIO_SET(AL_SIO_EE_CLK); al_delay(sc); SIO_CLR(AL_SIO_EE_CLK); al_delay(sc); } return; } /* * Read a word of data stored in the EEPROM at address 'addr.' */ static void al_eeprom_getword(sc, addr, dest) struct al_softc *sc; int addr; u_int16_t *dest; { register int i; u_int16_t word = 0; /* Force EEPROM to idle state. */ al_eeprom_idle(sc); /* Enter EEPROM access mode. */ CSR_WRITE_4(sc, AL_SIO, AL_SIO_EESEL); al_delay(sc); AL_SETBIT(sc, AL_SIO, AL_SIO_ROMCTL_READ); al_delay(sc); AL_SETBIT(sc, AL_SIO, AL_SIO_EE_CS); al_delay(sc); AL_SETBIT(sc, AL_SIO, AL_SIO_EE_CLK); al_delay(sc); /* * Send address of word we want to read. */ al_eeprom_putbyte(sc, addr); /* * Start reading bits from EEPROM. */ for (i = 0x8000; i; i >>= 1) { SIO_SET(AL_SIO_EE_CLK); al_delay(sc); if (CSR_READ_4(sc, AL_SIO) & AL_SIO_EE_DATAOUT) word |= i; al_delay(sc); SIO_CLR(AL_SIO_EE_CLK); al_delay(sc); } /* Turn off EEPROM access mode. */ al_eeprom_idle(sc); *dest = word; return; } /* * Read a sequence of words from the EEPROM. */ static void al_read_eeprom(sc, dest, off, cnt, swap) struct al_softc *sc; caddr_t dest; int off; int cnt; int swap; { int i; u_int16_t word = 0, *ptr; for (i = 0; i < cnt; i++) { al_eeprom_getword(sc, off + i, &word); ptr = (u_int16_t *)(dest + (i * 2)); if (swap) *ptr = ntohs(word); else *ptr = word; } return; } /* * Write a bit to the MII bus. */ static void al_mii_writebit(sc, bit) struct al_softc *sc; int bit; { if (bit) CSR_WRITE_4(sc, AL_SIO, AL_SIO_ROMCTL_WRITE|AL_SIO_MII_DATAOUT); else CSR_WRITE_4(sc, AL_SIO, AL_SIO_ROMCTL_WRITE); AL_SETBIT(sc, AL_SIO, AL_SIO_MII_CLK); AL_CLRBIT(sc, AL_SIO, AL_SIO_MII_CLK); return; } /* * Read a bit from the MII bus. */ static int al_mii_readbit(sc) struct al_softc *sc; { CSR_WRITE_4(sc, AL_SIO, AL_SIO_ROMCTL_READ|AL_SIO_MII_DIR); CSR_READ_4(sc, AL_SIO); AL_SETBIT(sc, AL_SIO, AL_SIO_MII_CLK); AL_CLRBIT(sc, AL_SIO, AL_SIO_MII_CLK); if (CSR_READ_4(sc, AL_SIO) & AL_SIO_MII_DATAIN) return(1); return(0); } /* * Sync the PHYs by setting data bit and strobing the clock 32 times. */ static void al_mii_sync(sc) struct al_softc *sc; { register int i; CSR_WRITE_4(sc, AL_SIO, AL_SIO_ROMCTL_WRITE); for (i = 0; i < 32; i++) al_mii_writebit(sc, 1); return; } /* * Clock a series of bits through the MII. */ static void al_mii_send(sc, bits, cnt) struct al_softc *sc; u_int32_t bits; int cnt; { int i; for (i = (0x1 << (cnt - 1)); i; i >>= 1) al_mii_writebit(sc, bits & i); } /* * Read an PHY register through the MII. */ static int al_mii_readreg(sc, frame) struct al_softc *sc; struct al_mii_frame *frame; { int i, ack, s; s = splimp(); /* * Set up frame for RX. */ frame->mii_stdelim = AL_MII_STARTDELIM; frame->mii_opcode = AL_MII_READOP; frame->mii_turnaround = 0; frame->mii_data = 0; /* * Sync the PHYs. */ al_mii_sync(sc); /* * Send command/address info. */ al_mii_send(sc, frame->mii_stdelim, 2); al_mii_send(sc, frame->mii_opcode, 2); al_mii_send(sc, frame->mii_phyaddr, 5); al_mii_send(sc, frame->mii_regaddr, 5); #ifdef notdef /* Idle bit */ al_mii_writebit(sc, 1); al_mii_writebit(sc, 0); #endif /* Check for ack */ ack = al_mii_readbit(sc); /* * Now try reading data bits. If the ack failed, we still * need to clock through 16 cycles to keep the PHY(s) in sync. */ if (ack) { for(i = 0; i < 16; i++) { al_mii_readbit(sc); } goto fail; } for (i = 0x8000; i; i >>= 1) { if (!ack) { if (al_mii_readbit(sc)) frame->mii_data |= i; } } fail: al_mii_writebit(sc, 0); al_mii_writebit(sc, 0); splx(s); if (ack) return(1); return(0); } /* * Write to a PHY register through the MII. */ static int al_mii_writereg(sc, frame) struct al_softc *sc; struct al_mii_frame *frame; { int s; s = splimp(); /* * Set up frame for TX. */ frame->mii_stdelim = AL_MII_STARTDELIM; frame->mii_opcode = AL_MII_WRITEOP; frame->mii_turnaround = AL_MII_TURNAROUND; /* * Sync the PHYs. */ al_mii_sync(sc); al_mii_send(sc, frame->mii_stdelim, 2); al_mii_send(sc, frame->mii_opcode, 2); al_mii_send(sc, frame->mii_phyaddr, 5); al_mii_send(sc, frame->mii_regaddr, 5); al_mii_send(sc, frame->mii_turnaround, 2); al_mii_send(sc, frame->mii_data, 16); /* Idle bit. */ al_mii_writebit(sc, 0); al_mii_writebit(sc, 0); splx(s); return(0); } static u_int16_t al_phy_readreg(sc, reg) struct al_softc *sc; int reg; { u_int16_t rval = 0; u_int16_t phy_reg = 0; struct al_mii_frame frame; if (sc->al_info->al_did == AL_DEVICEID_AN985) { if (sc->al_phy_addr != 1) return(0); frame.mii_phyaddr = sc->al_phy_addr; frame.mii_regaddr = reg; al_mii_readreg(sc, &frame); return(frame.mii_data); } switch(reg) { case PHY_BMCR: phy_reg = AL_BMCR; break; case PHY_BMSR: phy_reg = AL_BMSR; break; case PHY_VENID: phy_reg = AL_VENID; break; case PHY_DEVID: phy_reg = AL_DEVID; break; case PHY_ANAR: phy_reg = AL_ANAR; break; case PHY_LPAR: phy_reg = AL_LPAR; break; case PHY_ANEXP: phy_reg = AL_ANER; break; default: printf("al%d: read: bad phy register %x\n", sc->al_unit, reg); break; } rval = CSR_READ_4(sc, phy_reg) & 0x0000FFFF; return(rval); } static void al_phy_writereg(sc, reg, data) struct al_softc *sc; int reg; int data; { u_int16_t phy_reg = 0; struct al_mii_frame frame; if (sc->al_info->al_did == AL_DEVICEID_AN985) { if (sc->al_phy_addr != 1) return; frame.mii_phyaddr = sc->al_phy_addr; frame.mii_regaddr = reg; frame.mii_data = data; al_mii_writereg(sc, &frame); return; } switch(reg) { case PHY_BMCR: phy_reg = AL_BMCR; break; case PHY_BMSR: phy_reg = AL_BMSR; break; case PHY_VENID: phy_reg = AL_VENID; break; case PHY_DEVID: phy_reg = AL_DEVID; break; case PHY_ANAR: phy_reg = AL_ANAR; break; case PHY_LPAR: phy_reg = AL_LPAR; break; case PHY_ANEXP: phy_reg = AL_ANER; break; default: printf("al%d: phy_write: bad phy register %x\n", sc->al_unit, reg); break; } CSR_WRITE_4(sc, phy_reg, data); return; } /* * Calculate CRC of a multicast group address, return the lower 6 bits. */ static u_int32_t al_calchash(addr) caddr_t addr; { u_int32_t crc, carry; int i, j; u_int8_t c; /* Compute CRC for the address value. */ crc = 0xFFFFFFFF; /* initial value */ for (i = 0; i < 6; i++) { c = *(addr + i); for (j = 0; j < 8; j++) { carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01); crc <<= 1; c >>= 1; if (carry) crc = (crc ^ 0x04c11db6) | carry; } } /* return the filter bit position */ return((crc >> 26) & 0x0000003F); } static void al_setmulti(sc) struct al_softc *sc; { struct ifnet *ifp; int h = 0; u_int32_t hashes[2] = { 0, 0 }; struct ifmultiaddr *ifma; u_int32_t rxfilt; ifp = &sc->arpcom.ac_if; rxfilt = CSR_READ_4(sc, AL_NETCFG); if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { rxfilt |= AL_NETCFG_RX_ALLMULTI; CSR_WRITE_4(sc, AL_NETCFG, rxfilt); return; } else rxfilt &= ~AL_NETCFG_RX_ALLMULTI; /* first, zot all the existing hash bits */ CSR_WRITE_4(sc, AL_MAR0, 0); CSR_WRITE_4(sc, AL_MAR1, 0); /* now program new ones */ for (ifma = ifp->if_multiaddrs.lh_first; ifma != NULL; ifma = ifma->ifma_link.le_next) { if (ifma->ifma_addr->sa_family != AF_LINK) continue; h = al_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); if (h < 32) hashes[0] |= (1 << h); else hashes[1] |= (1 << (h - 32)); } CSR_WRITE_4(sc, AL_MAR0, hashes[0]); CSR_WRITE_4(sc, AL_MAR1, hashes[1]); CSR_WRITE_4(sc, AL_NETCFG, rxfilt); return; } /* * Initiate an autonegotiation session. */ static void al_autoneg_xmit(sc) struct al_softc *sc; { u_int16_t phy_sts; al_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET); DELAY(500); while(al_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_RESET); phy_sts = al_phy_readreg(sc, PHY_BMCR); phy_sts |= PHY_BMCR_AUTONEGENBL|PHY_BMCR_AUTONEGRSTR; al_phy_writereg(sc, PHY_BMCR, phy_sts); return; } /* * Invoke autonegotiation on a PHY. */ static void al_autoneg_mii(sc, flag, verbose) struct al_softc *sc; int flag; int verbose; { u_int16_t phy_sts = 0, media, advert, ability; struct ifnet *ifp; struct ifmedia *ifm; ifm = &sc->ifmedia; ifp = &sc->arpcom.ac_if; ifm->ifm_media = IFM_ETHER | IFM_AUTO; /* * The 100baseT4 PHY on the 3c905-T4 has the 'autoneg supported' * bit cleared in the status register, but has the 'autoneg enabled' * bit set in the control register. This is a contradiction, and * I'm not sure how to handle it. If you want to force an attempt * to autoneg for 100baseT4 PHYs, #define FORCE_AUTONEG_TFOUR * and see what happens. */ #ifndef FORCE_AUTONEG_TFOUR /* * First, see if autoneg is supported. If not, there's * no point in continuing. */ phy_sts = al_phy_readreg(sc, PHY_BMSR); if (!(phy_sts & PHY_BMSR_CANAUTONEG)) { if (verbose) printf("al%d: autonegotiation not supported\n", sc->al_unit); ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX; return; } #endif switch (flag) { case AL_FLAG_FORCEDELAY: /* * XXX Never use this option anywhere but in the probe * routine: making the kernel stop dead in its tracks * for three whole seconds after we've gone multi-user * is really bad manners. */ al_autoneg_xmit(sc); DELAY(5000000); break; case AL_FLAG_SCHEDDELAY: /* * Wait for the transmitter to go idle before starting * an autoneg session, otherwise al_start() may clobber * our timeout, and we don't want to allow transmission * during an autoneg session since that can screw it up. */ if (sc->al_cdata.al_tx_head != NULL) { sc->al_want_auto = 1; return; } al_autoneg_xmit(sc); ifp->if_timer = 5; sc->al_autoneg = 1; sc->al_want_auto = 0; return; break; case AL_FLAG_DELAYTIMEO: ifp->if_timer = 0; sc->al_autoneg = 0; break; default: printf("al%d: invalid autoneg flag: %d\n", sc->al_unit, flag); return; } if (al_phy_readreg(sc, PHY_BMSR) & PHY_BMSR_AUTONEGCOMP) { if (verbose) printf("al%d: autoneg complete, ", sc->al_unit); phy_sts = al_phy_readreg(sc, PHY_BMSR); } else { if (verbose) printf("al%d: autoneg not complete, ", sc->al_unit); } media = al_phy_readreg(sc, PHY_BMCR); /* Link is good. Report modes and set duplex mode. */ if (al_phy_readreg(sc, PHY_BMSR) & PHY_BMSR_LINKSTAT) { if (verbose) printf("link status good "); advert = al_phy_readreg(sc, PHY_ANAR); ability = al_phy_readreg(sc, PHY_LPAR); if (advert & PHY_ANAR_100BT4 && ability & PHY_ANAR_100BT4) { ifm->ifm_media = IFM_ETHER|IFM_100_T4; media |= PHY_BMCR_SPEEDSEL; media &= ~PHY_BMCR_DUPLEX; printf("(100baseT4)\n"); } else if (advert & PHY_ANAR_100BTXFULL && ability & PHY_ANAR_100BTXFULL) { ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_FDX; media |= PHY_BMCR_SPEEDSEL; media |= PHY_BMCR_DUPLEX; printf("(full-duplex, 100Mbps)\n"); } else if (advert & PHY_ANAR_100BTXHALF && ability & PHY_ANAR_100BTXHALF) { ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_HDX; media |= PHY_BMCR_SPEEDSEL; media &= ~PHY_BMCR_DUPLEX; printf("(half-duplex, 100Mbps)\n"); } else if (advert & PHY_ANAR_10BTFULL && ability & PHY_ANAR_10BTFULL) { ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_FDX; media &= ~PHY_BMCR_SPEEDSEL; media |= PHY_BMCR_DUPLEX; printf("(full-duplex, 10Mbps)\n"); } else if (advert & PHY_ANAR_10BTHALF && ability & PHY_ANAR_10BTHALF) { ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX; media &= ~PHY_BMCR_SPEEDSEL; media &= ~PHY_BMCR_DUPLEX; printf("(half-duplex, 10Mbps)\n"); } media &= ~PHY_BMCR_AUTONEGENBL; /* Set ASIC's duplex mode to match the PHY. */ al_phy_writereg(sc, PHY_BMCR, media); } else { if (verbose) printf("no carrier\n"); } al_init(sc); if (sc->al_tx_pend) { sc->al_autoneg = 0; sc->al_tx_pend = 0; al_start(ifp); } return; } static void al_getmode_mii(sc) struct al_softc *sc; { u_int16_t bmsr; struct ifnet *ifp; ifp = &sc->arpcom.ac_if; bmsr = al_phy_readreg(sc, PHY_BMSR); if (bootverbose) printf("al%d: PHY status word: %x\n", sc->al_unit, bmsr); /* fallback */ sc->ifmedia.ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX; if (bmsr & PHY_BMSR_10BTHALF) { if (bootverbose) printf("al%d: 10Mbps half-duplex mode supported\n", sc->al_unit); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL); } if (bmsr & PHY_BMSR_10BTFULL) { if (bootverbose) printf("al%d: 10Mbps full-duplex mode supported\n", sc->al_unit); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL); sc->ifmedia.ifm_media = IFM_ETHER|IFM_10_T|IFM_FDX; } if (bmsr & PHY_BMSR_100BTXHALF) { if (bootverbose) printf("al%d: 100Mbps half-duplex mode supported\n", sc->al_unit); ifp->if_baudrate = 100000000; ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX|IFM_HDX, 0, NULL); sc->ifmedia.ifm_media = IFM_ETHER|IFM_100_TX|IFM_HDX; } if (bmsr & PHY_BMSR_100BTXFULL) { if (bootverbose) printf("al%d: 100Mbps full-duplex mode supported\n", sc->al_unit); ifp->if_baudrate = 100000000; ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX|IFM_FDX, 0, NULL); sc->ifmedia.ifm_media = IFM_ETHER|IFM_100_TX|IFM_FDX; } /* Some also support 100BaseT4. */ if (bmsr & PHY_BMSR_100BT4) { if (bootverbose) printf("al%d: 100baseT4 mode supported\n", sc->al_unit); ifp->if_baudrate = 100000000; ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_T4, 0, NULL); sc->ifmedia.ifm_media = IFM_ETHER|IFM_100_T4; #ifdef FORCE_AUTONEG_TFOUR if (bootverbose) printf("al%d: forcing on autoneg support for BT4\n", sc->al_unit); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0 NULL): sc->ifmedia.ifm_media = IFM_ETHER|IFM_AUTO; #endif } if (bmsr & PHY_BMSR_CANAUTONEG) { if (bootverbose) printf("al%d: autoneg supported\n", sc->al_unit); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL); sc->ifmedia.ifm_media = IFM_ETHER|IFM_AUTO; } return; } /* * Set speed and duplex mode. */ static void al_setmode_mii(sc, media) struct al_softc *sc; int media; { u_int16_t bmcr; struct ifnet *ifp; ifp = &sc->arpcom.ac_if; /* * If an autoneg session is in progress, stop it. */ if (sc->al_autoneg) { printf("al%d: canceling autoneg session\n", sc->al_unit); ifp->if_timer = sc->al_autoneg = sc->al_want_auto = 0; bmcr = al_phy_readreg(sc, PHY_BMCR); bmcr &= ~PHY_BMCR_AUTONEGENBL; al_phy_writereg(sc, PHY_BMCR, bmcr); } printf("al%d: selecting MII, ", sc->al_unit); bmcr = al_phy_readreg(sc, PHY_BMCR); bmcr &= ~(PHY_BMCR_AUTONEGENBL|PHY_BMCR_SPEEDSEL| PHY_BMCR_DUPLEX|PHY_BMCR_LOOPBK); if (IFM_SUBTYPE(media) == IFM_100_T4) { printf("100Mbps/T4, half-duplex\n"); bmcr |= PHY_BMCR_SPEEDSEL; bmcr &= ~PHY_BMCR_DUPLEX; } if (IFM_SUBTYPE(media) == IFM_100_TX) { printf("100Mbps, "); bmcr |= PHY_BMCR_SPEEDSEL; } if (IFM_SUBTYPE(media) == IFM_10_T) { printf("10Mbps, "); bmcr &= ~PHY_BMCR_SPEEDSEL; } if ((media & IFM_GMASK) == IFM_FDX) { printf("full duplex\n"); bmcr |= PHY_BMCR_DUPLEX; } else { printf("half duplex\n"); bmcr &= ~PHY_BMCR_DUPLEX; } al_phy_writereg(sc, PHY_BMCR, bmcr); return; } static void al_reset(sc) struct al_softc *sc; { register int i; AL_SETBIT(sc, AL_BUSCTL, AL_BUSCTL_RESET); for (i = 0; i < AL_TIMEOUT; i++) { DELAY(10); if (!(CSR_READ_4(sc, AL_BUSCTL) & AL_BUSCTL_RESET)) break; } #ifdef notdef if (i == AL_TIMEOUT) printf("al%d: reset never completed!\n", sc->al_unit); #endif CSR_WRITE_4(sc, AL_BUSCTL, AL_BUSCTL_ARBITRATION); /* Wait a little while for the chip to get its brains in order. */ DELAY(1000); return; } /* * Probe for an ADMtek chip. Check the PCI vendor and device * IDs against our list and return a device name if we find a match. */ static const char * al_probe(config_id, device_id) pcici_t config_id; pcidi_t device_id; { struct al_type *t; t = al_devs; while(t->al_name != NULL) { if ((device_id & 0xFFFF) == t->al_vid && ((device_id >> 16) & 0xFFFF) == t->al_did) { return(t->al_name); } t++; } return(NULL); } /* * Attach the interface. Allocate softc structures, do ifmedia * setup and ethernet/BPF attach. */ static void al_attach(config_id, unit) pcici_t config_id; int unit; { int s, i; #ifndef AL_USEIOSPACE vm_offset_t pbase, vbase; #endif u_char eaddr[ETHER_ADDR_LEN]; u_int32_t command; struct al_softc *sc; struct ifnet *ifp; int media = IFM_ETHER|IFM_100_TX|IFM_FDX; unsigned int round; caddr_t roundptr; struct al_type *p; u_int16_t phy_vid, phy_did, phy_sts; u_int32_t device_id; s = splimp(); sc = malloc(sizeof(struct al_softc), M_DEVBUF, M_NOWAIT); if (sc == NULL) { printf("al%d: no memory for softc struct!\n", unit); goto fail; } bzero(sc, sizeof(struct al_softc)); /* Save the device type; we need it later */ device_id = pci_conf_read(config_id, AL_PCI_VENDOR_ID); p = al_devs; while(p->al_name != NULL) { if ((device_id & 0xFFFF) == p->al_vid && ((device_id >> 16) & 0xFFFF) == p->al_did) { break; } p++; } sc->al_info = p; /* * Handle power management nonsense. */ command = pci_conf_read(config_id, AL_PCI_CAPID) & 0x000000FF; if (command == 0x01) { command = pci_conf_read(config_id, AL_PCI_PWRMGMTCTRL); if (command & AL_PSTATE_MASK) { u_int32_t iobase, membase, irq; /* Save important PCI config data. */ iobase = pci_conf_read(config_id, AL_PCI_LOIO); membase = pci_conf_read(config_id, AL_PCI_LOMEM); irq = pci_conf_read(config_id, AL_PCI_INTLINE); /* Reset the power state. */ printf("al%d: chip is in D%d power mode " "-- setting to D0\n", unit, command & AL_PSTATE_MASK); command &= 0xFFFFFFFC; pci_conf_write(config_id, AL_PCI_PWRMGMTCTRL, command); /* Restore PCI config data. */ pci_conf_write(config_id, AL_PCI_LOIO, iobase); pci_conf_write(config_id, AL_PCI_LOMEM, membase); pci_conf_write(config_id, AL_PCI_INTLINE, irq); } } /* * Map control/status registers. */ command = pci_conf_read(config_id, PCI_COMMAND_STATUS_REG); command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN); pci_conf_write(config_id, PCI_COMMAND_STATUS_REG, command); command = pci_conf_read(config_id, PCI_COMMAND_STATUS_REG); #ifdef AL_USEIOSPACE if (!(command & PCIM_CMD_PORTEN)) { printf("al%d: failed to enable I/O ports!\n", unit); free(sc, M_DEVBUF); goto fail; } if (!pci_map_port(config_id, AL_PCI_LOIO, (u_short *)&(sc->al_bhandle))) { printf ("al%d: couldn't map ports\n", unit); goto fail; } #ifdef __i386__ sc->al_btag = I386_BUS_SPACE_IO; #endif #ifdef __alpha__ sc->al_btag = ALPHA_BUS_SPACE_IO; #endif #else if (!(command & PCIM_CMD_MEMEN)) { printf("al%d: failed to enable memory mapping!\n", unit); goto fail; } if (!pci_map_mem(config_id, AL_PCI_LOMEM, &vbase, &pbase)) { printf ("al%d: couldn't map memory\n", unit); goto fail; } #ifdef __i386__ sc->al_btag = I386_BUS_SPACE_MEM; #endif #ifdef __alpha__ sc->al_btag = ALPHA_BUS_SPACE_MEM; #endif sc->al_bhandle = vbase; #endif /* Allocate interrupt */ if (!pci_map_int(config_id, al_intr, sc, &net_imask)) { printf("al%d: couldn't map interrupt\n", unit); goto fail; } /* Save cache line size. */ sc->al_cachesize = pci_conf_read(config_id, AL_PCI_CACHELEN) & 0xFF; /* Reset the adapter. */ al_reset(sc); /* * Get station address from the EEPROM. */ al_read_eeprom(sc, (caddr_t)&eaddr, AL_EE_NODEADDR, 3, 0); /* * An ADMtek chip was detected. Inform the world. */ printf("al%d: Ethernet address: %6D\n", unit, eaddr, ":"); sc->al_unit = unit; bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); sc->al_ldata_ptr = malloc(sizeof(struct al_list_data) + 8, M_DEVBUF, M_NOWAIT); if (sc->al_ldata_ptr == NULL) { free(sc, M_DEVBUF); printf("al%d: no memory for list buffers!\n", unit); goto fail; } sc->al_ldata = (struct al_list_data *)sc->al_ldata_ptr; round = (unsigned long)sc->al_ldata_ptr & 0xF; roundptr = sc->al_ldata_ptr; for (i = 0; i < 8; i++) { if (round % 8) { round++; roundptr++; } else break; } sc->al_ldata = (struct al_list_data *)roundptr; bzero(sc->al_ldata, sizeof(struct al_list_data)); ifp = &sc->arpcom.ac_if; ifp->if_softc = sc; ifp->if_unit = unit; ifp->if_name = "al"; ifp->if_mtu = ETHERMTU; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_ioctl = al_ioctl; ifp->if_output = ether_output; ifp->if_start = al_start; ifp->if_watchdog = al_watchdog; ifp->if_init = al_init; ifp->if_baudrate = 10000000; ifp->if_snd.ifq_maxlen = AL_TX_LIST_CNT - 1; if (bootverbose) printf("al%d: probing for a PHY\n", sc->al_unit); for (i = AL_PHYADDR_MIN; i < AL_PHYADDR_MAL + 1; i++) { if (bootverbose) printf("al%d: checking address: %d\n", sc->al_unit, i); sc->al_phy_addr = i; al_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET); DELAY(500); while(al_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_RESET); if ((phy_sts = al_phy_readreg(sc, PHY_BMSR))) break; } if (phy_sts) { phy_vid = al_phy_readreg(sc, PHY_VENID); phy_did = al_phy_readreg(sc, PHY_DEVID); if (bootverbose) printf("al%d: found PHY at address %d, ", sc->al_unit, sc->al_phy_addr); if (bootverbose) printf("vendor id: %x device id: %x\n", phy_vid, phy_did); p = al_phys; while(p->al_vid) { if (phy_vid == p->al_vid && (phy_did | 0x000F) == p->al_did) { sc->al_pinfo = p; break; } p++; } if (sc->al_pinfo == NULL) sc->al_pinfo = &al_phys[PHY_UNKNOWN]; if (bootverbose) printf("al%d: PHY type: %s\n", sc->al_unit, sc->al_pinfo->al_name); } else { #ifdef DIAGNOSTIC printf("al%d: MII without any phy!\n", sc->al_unit); #endif } /* * Do ifmedia setup. */ ifmedia_init(&sc->ifmedia, 0, al_ifmedia_upd, al_ifmedia_sts); if (sc->al_pinfo != NULL) { al_getmode_mii(sc); al_autoneg_mii(sc, AL_FLAG_FORCEDELAY, 1); } else { ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX|IFM_HDX, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX|IFM_FDX, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX, 0, NULL); ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL); } media = sc->ifmedia.ifm_media; al_stop(sc); ifmedia_set(&sc->ifmedia, media); /* * Call MI attach routines. */ if_attach(ifp); ether_ifattach(ifp); #if NBPFILTER > 0 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif at_shutdown(al_shutdown, sc, SHUTDOWN_POST_SYNC); fail: splx(s); return; } /* * Initialize the transmit descriptors. */ static int al_list_tx_init(sc) struct al_softc *sc; { struct al_chain_data *cd; struct al_list_data *ld; int i; cd = &sc->al_cdata; ld = sc->al_ldata; for (i = 0; i < AL_TX_LIST_CNT; i++) { cd->al_tx_chain[i].al_ptr = &ld->al_tx_list[i]; if (i == (AL_TX_LIST_CNT - 1)) cd->al_tx_chain[i].al_nextdesc = &cd->al_tx_chain[0]; else cd->al_tx_chain[i].al_nextdesc = &cd->al_tx_chain[i + 1]; } cd->al_tx_free = &cd->al_tx_chain[0]; cd->al_tx_tail = cd->al_tx_head = NULL; return(0); } /* * Initialize the RX descriptors and allocate mbufs for them. Note that * we arrange the descriptors in a closed ring, so that the last descriptor * points back to the first. */ static int al_list_rx_init(sc) struct al_softc *sc; { struct al_chain_data *cd; struct al_list_data *ld; int i; cd = &sc->al_cdata; ld = sc->al_ldata; for (i = 0; i < AL_RX_LIST_CNT; i++) { cd->al_rx_chain[i].al_ptr = (volatile struct al_desc *)&ld->al_rx_list[i]; if (al_newbuf(sc, &cd->al_rx_chain[i]) == ENOBUFS) return(ENOBUFS); if (i == (AL_RX_LIST_CNT - 1)) { cd->al_rx_chain[i].al_nextdesc = &cd->al_rx_chain[0]; ld->al_rx_list[i].al_next = vtophys(&ld->al_rx_list[0]); } else { cd->al_rx_chain[i].al_nextdesc = &cd->al_rx_chain[i + 1]; ld->al_rx_list[i].al_next = vtophys(&ld->al_rx_list[i + 1]); } } cd->al_rx_head = &cd->al_rx_chain[0]; return(0); } /* * Initialize an RX descriptor and attach an MBUF cluster. * Note: the length fields are only 11 bits wide, which means the * largest size we can specify is 2047. This is important because * MCLBYTES is 2048, so we have to subtract one otherwise we'll * overflow the field and make a mess. */ static int al_newbuf(sc, c) struct al_softc *sc; struct al_chain_onefrag *c; { struct mbuf *m_new = NULL; MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { printf("al%d: no memory for rx list -- packet dropped!\n", sc->al_unit); return(ENOBUFS); } MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { printf("al%d: no memory for rx list -- packet dropped!\n", sc->al_unit); m_freem(m_new); return(ENOBUFS); } c->al_mbuf = m_new; c->al_ptr->al_status = AL_RXSTAT; c->al_ptr->al_data = vtophys(mtod(m_new, caddr_t)); c->al_ptr->al_ctl = MCLBYTES - 1; return(0); } /* * A frame has been uploaded: pass the resulting mbuf chain up to * the higher level protocols. */ static void al_rxeof(sc) struct al_softc *sc; { struct ether_header *eh; struct mbuf *m; struct ifnet *ifp; struct al_chain_onefrag *cur_rx; int total_len = 0; u_int32_t rxstat; ifp = &sc->arpcom.ac_if; while(!((rxstat = sc->al_cdata.al_rx_head->al_ptr->al_status) & AL_RXSTAT_OWN)) { #ifdef __alpha__ struct mbuf *m0 = NULL; #endif cur_rx = sc->al_cdata.al_rx_head; sc->al_cdata.al_rx_head = cur_rx->al_nextdesc; /* * If an error occurs, update stats, clear the * status word and leave the mbuf cluster in place: * it should simply get re-used next time this descriptor * comes up in the ring. */ if (rxstat & AL_RXSTAT_RXERR) { ifp->if_ierrors++; if (rxstat & AL_RXSTAT_COLLSEEN) ifp->if_collisions++; cur_rx->al_ptr->al_status = AL_RXSTAT; cur_rx->al_ptr->al_ctl = (MCLBYTES - 1); continue; } /* No errors; receive the packet. */ m = cur_rx->al_mbuf; total_len = AL_RXBYTES(cur_rx->al_ptr->al_status); total_len -= ETHER_CRC_LEN; #ifdef __alpha__ /* * Try to conjure up a new mbuf cluster. If that * fails, it means we have an out of memory condition and * should leave the buffer in place and continue. This will * result in a lost packet, but there's little else we * can do in this situation. */ if (al_newbuf(sc, cur_rx) == ENOBUFS) { ifp->if_ierrors++; cur_rx->al_ptr->al_status = AL_RXSTAT; cur_rx->al_ptr->al_ctl = (MCLBYTES - 1); continue; } /* * Sadly, the ADMtek chip doesn't decode the last few * bits of the RX DMA buffer address, so we have to * cheat in order to obtain proper payload alignment * on the alpha. */ MGETHDR(m0, M_DONTWAIT, MT_DATA); if (m0 == NULL) { ifp->if_ierrors++; cur_rx->al_ptr->al_status = AL_RXSTAT; cur_rx->al_ptr->al_ctl = (MCLBYTES - 1); continue; } m0->m_data += 2; if (total_len <= (MHLEN - 2)) { bcopy(mtod(m, caddr_t), mtod(m0, caddr_t), total_len); m_freem(m); m = m0; m->m_pkthdr.len = m->m_len = total_len; } else { bcopy(mtod(m, caddr_t), mtod(m0, caddr_t), (MHLEN - 2)); m->m_len = total_len - (MHLEN - 2); m->m_data += (MHLEN - 2); m0->m_next = m; m0->m_len = (MHLEN - 2); m = m0; m->m_pkthdr.len = total_len; } m->m_pkthdr.rcvif = ifp; #else if (total_len < MINCLSIZE) { m = m_devget(mtod(cur_rx->al_mbuf, char *), total_len, 0, ifp, NULL); cur_rx->al_ptr->al_status = AL_RXSTAT; cur_rx->al_ptr->al_ctl = (MCLBYTES - 1); if (m == NULL) { ifp->if_ierrors++; continue; } } else { m = cur_rx->al_mbuf; /* * Try to conjure up a new mbuf cluster. If that * fails, it means we have an out of memory condition and * should leave the buffer in place and continue. This will * result in a lost packet, but there's little else we * can do in this situation. */ if (al_newbuf(sc, cur_rx) == ENOBUFS) { ifp->if_ierrors++; cur_rx->al_ptr->al_status = AL_RXSTAT; cur_rx->al_ptr->al_ctl = (MCLBYTES - 1); continue; } m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = m->m_len = total_len; } #endif ifp->if_ipackets++; eh = mtod(m, struct ether_header *); #if NBPFILTER > 0 /* * Handle BPF listeners. Let the BPF user see the packet, but * don't pass it up to the ether_input() layer unless it's * a broadcast packet, multicast packet, matches our ethernet * address or the interface is in promiscuous mode. */ if (ifp->if_bpf) { bpf_mtap(ifp, m); if (ifp->if_flags & IFF_PROMISC && (bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr, ETHER_ADDR_LEN) && (eh->ether_dhost[0] & 1) == 0)) { m_freem(m); continue; } } #endif /* Remove header from mbuf and pass it on. */ m_adj(m, sizeof(struct ether_header)); ether_input(ifp, eh, m); } return; } void al_rxeoc(sc) struct al_softc *sc; { al_rxeof(sc); AL_CLRBIT(sc, AL_NETCFG, AL_NETCFG_RX_ON); CSR_WRITE_4(sc, AL_RXADDR, vtophys(sc->al_cdata.al_rx_head->al_ptr)); AL_SETBIT(sc, AL_NETCFG, AL_NETCFG_RX_ON); CSR_WRITE_4(sc, AL_RXSTART, 0xFFFFFFFF); return; } /* * A frame was downloaded to the chip. It's safe for us to clean up * the list buffers. */ static void al_txeof(sc) struct al_softc *sc; { struct al_chain *cur_tx; struct ifnet *ifp; ifp = &sc->arpcom.ac_if; /* Clear the timeout timer. */ ifp->if_timer = 0; if (sc->al_cdata.al_tx_head == NULL) return; /* * Go through our tx list and free mbufs for those * frames that have been transmitted. */ while(sc->al_cdata.al_tx_head->al_mbuf != NULL) { u_int32_t txstat; cur_tx = sc->al_cdata.al_tx_head; txstat = AL_TXSTATUS(cur_tx); if (txstat & AL_TXSTAT_OWN) break; if (txstat & AL_TXSTAT_ERRSUM) { ifp->if_oerrors++; if (txstat & AL_TXSTAT_EXCESSCOLL) ifp->if_collisions++; if (txstat & AL_TXSTAT_LATECOLL) ifp->if_collisions++; } ifp->if_collisions += (txstat & AL_TXSTAT_COLLCNT) >> 3; ifp->if_opackets++; m_freem(cur_tx->al_mbuf); cur_tx->al_mbuf = NULL; if (sc->al_cdata.al_tx_head == sc->al_cdata.al_tx_tail) { sc->al_cdata.al_tx_head = NULL; sc->al_cdata.al_tx_tail = NULL; ifp->if_flags &= ~IFF_OACTIVE; break; } sc->al_cdata.al_tx_head = cur_tx->al_nextdesc; } return; } /* * TX 'end of channel' interrupt handler. */ static void al_txeoc(sc) struct al_softc *sc; { struct ifnet *ifp; ifp = &sc->arpcom.ac_if; ifp->if_timer = 0; if (sc->al_cdata.al_tx_head == NULL) { ifp->if_flags &= ~IFF_OACTIVE; sc->al_cdata.al_tx_tail = NULL; if (sc->al_want_auto) al_autoneg_mii(sc, AL_FLAG_DELAYTIMEO, 1); } return; } static void al_intr(arg) void *arg; { struct al_softc *sc; struct ifnet *ifp; u_int32_t status; sc = arg; ifp = &sc->arpcom.ac_if; /* Supress unwanted interrupts */ if (!(ifp->if_flags & IFF_UP)) { al_stop(sc); return; } /* Disable interrupts. */ CSR_WRITE_4(sc, AL_IMR, 0x00000000); for (;;) { status = CSR_READ_4(sc, AL_ISR); if (status) CSR_WRITE_4(sc, AL_ISR, status); if ((status & AL_INTRS) == 0) break; if (status & AL_ISR_TX_OK) al_txeof(sc); if (status & AL_ISR_TX_NOBUF) al_txeoc(sc); if (status & AL_ISR_TX_IDLE) { al_txeof(sc); if (sc->al_cdata.al_tx_head != NULL) { AL_SETBIT(sc, AL_NETCFG, AL_NETCFG_TX_ON); CSR_WRITE_4(sc, AL_TXSTART, 0xFFFFFFFF); } } if (status & AL_ISR_TX_UNDERRUN) { u_int32_t cfg; cfg = CSR_READ_4(sc, AL_NETCFG); if ((cfg & AL_NETCFG_TX_THRESH) == AL_TXTHRESH_160BYTES) AL_SETBIT(sc, AL_NETCFG, AL_NETCFG_STORENFWD); else CSR_WRITE_4(sc, AL_NETCFG, cfg + 0x4000); } if (status & AL_ISR_RX_OK) al_rxeof(sc); if ((status & AL_ISR_RX_WATDOGTIMEO) || (status & AL_ISR_RX_NOBUF)) al_rxeoc(sc); if (status & AL_ISR_BUS_ERR) { al_reset(sc); al_init(sc); } } /* Re-enable interrupts. */ CSR_WRITE_4(sc, AL_IMR, AL_INTRS); if (ifp->if_snd.ifq_head != NULL) { al_start(ifp); } return; } /* * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data * pointers to the fragment pointers. */ static int al_encap(sc, c, m_head) struct al_softc *sc; struct al_chain *c; struct mbuf *m_head; { int frag = 0; volatile struct al_desc *f = NULL; int total_len; struct mbuf *m; /* * Start packing the mbufs in this chain into * the fragment pointers. Stop when we run out * of fragments or hit the end of the mbuf chain. */ m = m_head; total_len = 0; for (m = m_head, frag = 0; m != NULL; m = m->m_next) { if (m->m_len != 0) { if (frag == AL_MAXFRAGS) break; total_len += m->m_len; f = &c->al_ptr->al_frag[frag]; f->al_ctl = AL_TXCTL_TLINK | m->m_len; if (frag == 0) { f->al_status = 0; f->al_ctl |= AL_TXCTL_FIRSTFRAG; } else f->al_status = AL_TXSTAT_OWN; f->al_next = vtophys(&c->al_ptr->al_frag[frag + 1]); f->al_data = vtophys(mtod(m, vm_offset_t)); frag++; } } /* * Handle special case: we ran out of fragments, * but we have more mbufs left in the chain. Copy the * data into an mbuf cluster. Note that we don't * bother clearing the values in the other fragment * pointers/counters; it wouldn't gain us anything, * and would waste cycles. */ if (m != NULL) { struct mbuf *m_new = NULL; MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { printf("al%d: no memory for tx list", sc->al_unit); return(1); } if (m_head->m_pkthdr.len > MHLEN) { MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { m_freem(m_new); printf("al%d: no memory for tx list", sc->al_unit); return(1); } } m_copydata(m_head, 0, m_head->m_pkthdr.len, mtod(m_new, caddr_t)); m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len; m_freem(m_head); m_head = m_new; f = &c->al_ptr->al_frag[0]; f->al_status = 0; f->al_data = vtophys(mtod(m_new, caddr_t)); f->al_ctl = total_len = m_new->m_len; f->al_ctl |= AL_TXCTL_TLINK|AL_TXCTL_FIRSTFRAG; frag = 1; } c->al_mbuf = m_head; c->al_lastdesc = frag - 1; AL_TXCTL(c) |= AL_TXCTL_LASTFRAG|AL_TXCTL_FINT; AL_TXNEXT(c) = vtophys(&c->al_nextdesc->al_ptr->al_frag[0]); return(0); } /* * Main transmit routine. To avoid having to do mbuf copies, we put pointers * to the mbuf data regions directly in the transmit lists. We also save a * copy of the pointers since the transmit list fragment pointers are * physical addresses. */ static void al_start(ifp) struct ifnet *ifp; { struct al_softc *sc; struct mbuf *m_head = NULL; struct al_chain *cur_tx = NULL, *start_tx; sc = ifp->if_softc; if (ifp->if_flags & IFF_OACTIVE) return; if (sc->al_autoneg) { sc->al_tx_pend = 1; return; } /* * Check for an available queue slot. If there are none, * punt. */ if (sc->al_cdata.al_tx_free->al_mbuf != NULL) { ifp->if_flags |= IFF_OACTIVE; return; } start_tx = sc->al_cdata.al_tx_free; while(sc->al_cdata.al_tx_free->al_mbuf == NULL) { IF_DEQUEUE(&ifp->if_snd, m_head); if (m_head == NULL) break; /* Pick a descriptor off the free list. */ cur_tx = sc->al_cdata.al_tx_free; sc->al_cdata.al_tx_free = cur_tx->al_nextdesc; /* Pack the data into the descriptor. */ al_encap(sc, cur_tx, m_head); #if NBPFILTER > 0 /* * If there's a BPF listener, bounce a copy of this frame * to him. */ if (ifp->if_bpf) bpf_mtap(ifp, cur_tx->al_mbuf); #endif AL_TXOWN(cur_tx) = AL_TXSTAT_OWN; CSR_WRITE_4(sc, AL_TXSTART, 0xFFFFFFFF); #ifdef AL_TX_STALL_WAR /* * Work around some strange behavior in the Comet. For * some reason, the transmitter will sometimes wedge if * we queue up a descriptor chain that wraps from the end * of the transmit list back to the beginning. If we reach * the end of the list and still have more packets to queue, * don't queue them now: end the transmit session here and * then wait until it finishes before sending the other * packets. */ if (cur_tx == &sc->al_cdata.al_tx_chain[AL_TX_LIST_CNT - 1]) { ifp->if_flags |= IFF_OACTIVE; break; } #endif } sc->al_cdata.al_tx_tail = cur_tx; if (sc->al_cdata.al_tx_head == NULL) sc->al_cdata.al_tx_head = start_tx; /* * Set a timeout in case the chip goes out to lunch. */ ifp->if_timer = 5; return; } static void al_init(xsc) void *xsc; { struct al_softc *sc = xsc; struct ifnet *ifp = &sc->arpcom.ac_if; u_int16_t phy_bmcr = 0; int s; if (sc->al_autoneg) return; s = splimp(); if (sc->al_pinfo != NULL) phy_bmcr = al_phy_readreg(sc, PHY_BMCR); /* * Cancel pending I/O and free all RX/TX buffers. */ al_stop(sc); al_reset(sc); /* * Set cache alignment and burst length. */ CSR_WRITE_4(sc, AL_BUSCTL, AL_BUSCTL_ARBITRATION); AL_SETBIT(sc, AL_BUSCTL, AL_BURSTLEN_16LONG); switch(sc->al_cachesize) { case 32: AL_SETBIT(sc, AL_BUSCTL, AL_CACHEALIGN_32LONG); break; case 16: AL_SETBIT(sc, AL_BUSCTL, AL_CACHEALIGN_16LONG); break; case 8: AL_SETBIT(sc, AL_BUSCTL, AL_CACHEALIGN_8LONG); break; case 0: default: AL_SETBIT(sc, AL_BUSCTL, AL_CACHEALIGN_NONE); break; } AL_CLRBIT(sc, AL_NETCFG, AL_NETCFG_HEARTBEAT); AL_CLRBIT(sc, AL_NETCFG, AL_NETCFG_STORENFWD); AL_CLRBIT(sc, AL_NETCFG, AL_NETCFG_TX_THRESH); if (IFM_SUBTYPE(sc->ifmedia.ifm_media) == IFM_10_T) AL_SETBIT(sc, AL_NETCFG, AL_TXTHRESH_160BYTES); else AL_SETBIT(sc, AL_NETCFG, AL_TXTHRESH_72BYTES); /* Init our MAC address */ CSR_WRITE_4(sc, AL_PAR0, *(u_int32_t *)(&sc->arpcom.ac_enaddr[0])); CSR_WRITE_4(sc, AL_PAR1, *(u_int32_t *)(&sc->arpcom.ac_enaddr[4])); /* Init circular RX list. */ if (al_list_rx_init(sc) == ENOBUFS) { printf("al%d: initialization failed: no " "memory for rx buffers\n", sc->al_unit); al_stop(sc); (void)splx(s); return; } /* * Init tx descriptors. */ al_list_tx_init(sc); /* If we want promiscuous mode, set the allframes bit. */ if (ifp->if_flags & IFF_PROMISC) { AL_SETBIT(sc, AL_NETCFG, AL_NETCFG_RX_PROMISC); } else { AL_CLRBIT(sc, AL_NETCFG, AL_NETCFG_RX_PROMISC); } /* * Load the multicast filter. */ al_setmulti(sc); /* * Load the address of the RX list. */ CSR_WRITE_4(sc, AL_RXADDR, vtophys(sc->al_cdata.al_rx_head->al_ptr)); CSR_WRITE_4(sc, AL_TXADDR, vtophys(&sc->al_ldata->al_tx_list[0])); /* * Enable interrupts. */ CSR_WRITE_4(sc, AL_IMR, AL_INTRS); CSR_WRITE_4(sc, AL_ISR, 0xFFFFFFFF); /* Enable receiver and transmitter. */ AL_SETBIT(sc, AL_NETCFG, AL_NETCFG_TX_ON|AL_NETCFG_RX_ON); CSR_WRITE_4(sc, AL_RXSTART, 0xFFFFFFFF); /* Restore state of BMCR */ if (sc->al_pinfo != NULL) al_phy_writereg(sc, PHY_BMCR, phy_bmcr); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; (void)splx(s); return; } /* * Set media options. */ static int al_ifmedia_upd(ifp) struct ifnet *ifp; { struct al_softc *sc; struct ifmedia *ifm; sc = ifp->if_softc; ifm = &sc->ifmedia; if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) return(EINVAL); if (IFM_SUBTYPE(ifm->ifm_media) == IFM_AUTO) al_autoneg_mii(sc, AL_FLAG_SCHEDDELAY, 1); else { al_setmode_mii(sc, ifm->ifm_media); } return(0); } /* * Report current media status. */ static void al_ifmedia_sts(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct al_softc *sc; u_int16_t advert = 0, ability = 0; sc = ifp->if_softc; ifmr->ifm_active = IFM_ETHER; if (!(al_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_AUTONEGENBL)) { if (al_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_SPEEDSEL) ifmr->ifm_active = IFM_ETHER|IFM_100_TX; else ifmr->ifm_active = IFM_ETHER|IFM_10_T; if (al_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_DUPLEX) ifmr->ifm_active |= IFM_FDX; else ifmr->ifm_active |= IFM_HDX; return; } ability = al_phy_readreg(sc, PHY_LPAR); advert = al_phy_readreg(sc, PHY_ANAR); if (advert & PHY_ANAR_100BT4 && ability & PHY_ANAR_100BT4) { ifmr->ifm_active = IFM_ETHER|IFM_100_T4; } else if (advert & PHY_ANAR_100BTXFULL && ability & PHY_ANAR_100BTXFULL) { ifmr->ifm_active = IFM_ETHER|IFM_100_TX|IFM_FDX; } else if (advert & PHY_ANAR_100BTXHALF && ability & PHY_ANAR_100BTXHALF) { ifmr->ifm_active = IFM_ETHER|IFM_100_TX|IFM_HDX; } else if (advert & PHY_ANAR_10BTFULL && ability & PHY_ANAR_10BTFULL) { ifmr->ifm_active = IFM_ETHER|IFM_10_T|IFM_FDX; } else if (advert & PHY_ANAR_10BTHALF && ability & PHY_ANAR_10BTHALF) { ifmr->ifm_active = IFM_ETHER|IFM_10_T|IFM_HDX; } return; } static int al_ioctl(ifp, command, data) struct ifnet *ifp; u_long command; caddr_t data; { struct al_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *) data; int s, error = 0; s = splimp(); switch(command) { case SIOCSIFADDR: case SIOCGIFADDR: case SIOCSIFMTU: error = ether_ioctl(ifp, command, data); break; case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { al_init(sc); } else { if (ifp->if_flags & IFF_RUNNING) al_stop(sc); } error = 0; break; case SIOCADDMULTI: case SIOCDELMULTI: al_setmulti(sc); error = 0; break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, command); break; default: error = EINVAL; break; } (void)splx(s); return(error); } static void al_watchdog(ifp) struct ifnet *ifp; { struct al_softc *sc; sc = ifp->if_softc; if (sc->al_autoneg) { al_autoneg_mii(sc, AL_FLAG_DELAYTIMEO, 1); return; } ifp->if_oerrors++; printf("al%d: watchdog timeout\n", sc->al_unit); if (sc->al_pinfo != NULL) { if (!(al_phy_readreg(sc, PHY_BMSR) & PHY_BMSR_LINKSTAT)) printf("al%d: no carrier - transceiver " "cable problem?\n", sc->al_unit); } al_stop(sc); al_reset(sc); al_init(sc); if (ifp->if_snd.ifq_head != NULL) al_start(ifp); return; } /* * Stop the adapter and free any mbufs allocated to the * RX and TX lists. */ static void al_stop(sc) struct al_softc *sc; { register int i; struct ifnet *ifp; ifp = &sc->arpcom.ac_if; ifp->if_timer = 0; AL_CLRBIT(sc, AL_NETCFG, (AL_NETCFG_RX_ON|AL_NETCFG_TX_ON)); CSR_WRITE_4(sc, AL_IMR, 0x00000000); CSR_WRITE_4(sc, AL_TXADDR, 0x00000000); CSR_WRITE_4(sc, AL_RXADDR, 0x00000000); /* * Free data in the RX lists. */ for (i = 0; i < AL_RX_LIST_CNT; i++) { if (sc->al_cdata.al_rx_chain[i].al_mbuf != NULL) { m_freem(sc->al_cdata.al_rx_chain[i].al_mbuf); sc->al_cdata.al_rx_chain[i].al_mbuf = NULL; } } bzero((char *)&sc->al_ldata->al_rx_list, sizeof(sc->al_ldata->al_rx_list)); /* * Free the TX list buffers. */ for (i = 0; i < AL_TX_LIST_CNT; i++) { if (sc->al_cdata.al_tx_chain[i].al_mbuf != NULL) { m_freem(sc->al_cdata.al_tx_chain[i].al_mbuf); sc->al_cdata.al_tx_chain[i].al_mbuf = NULL; } } bzero((char *)&sc->al_ldata->al_tx_list, sizeof(sc->al_ldata->al_tx_list)); ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); return; } /* * Stop all chip I/O so that the kernel's probe routines don't * get confused by errant DMAs when rebooting. */ static void al_shutdown(howto, arg) int howto; void *arg; { struct al_softc *sc = (struct al_softc *)arg; al_stop(sc); return; } static struct pci_device al_device = { "al", al_probe, al_attach, &al_count, NULL }; DATA_SET(pcidevice_set, al_device);