FreeBSD/Linux Kernel Cross Reference
sys/dev/de/if_de.c

     /*      $NetBSD: if_de.c,v 1.86 1999/06/01 19:17:59 thorpej Exp $       */
     /*-
      * 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.
     *
     * Id: if_de.c,v 1.94 1997/07/03 16:55:07 thomas Exp
     */
    
    /*
     * DEC 21040 PCI Ethernet Controller
     *
     * Written by Matt Thomas
     * BPF support code stolen directly from if_ec.c
     *
     *   This driver supports the DEC DE435 or any other PCI
     *   board which support 21040, 21041, or 21140 (mostly).
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/8.4/sys/dev/de/if_de.c 233025 2012-03-16 09:22:59Z scottl $");
    
    #define TULIP_HDR_DATA
    
    #include "opt_ddb.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/endian.h>
    #include <sys/ktr.h>
    #include <sys/mbuf.h>
    #include <sys/socket.h>
    #include <sys/sockio.h>
    #include <sys/malloc.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/eventhandler.h>
    #include <machine/bus.h>
    #include <machine/bus_dma.h>
    #include <machine/resource.h>
    #include <sys/bus.h>
    #include <sys/rman.h>
    
    #include <net/if.h>
    #include <net/if_arp.h>
    #include <net/ethernet.h>
    #include <net/if_media.h>
    #include <net/if_types.h>
    #include <net/if_dl.h>
    
    #include <net/bpf.h>
    
    #ifdef INET
    #include <netinet/in.h>
    #include <netinet/if_ether.h>
    #endif
    
    #include <vm/vm.h>
    
    #include <net/if_var.h>
    #include <vm/pmap.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    #include <dev/de/dc21040reg.h>
    
    #ifdef DDB
    #include <ddb/ddb.h>
    #endif
    
    /*
     * Intel CPUs should use I/O mapped access.
     */
    #if defined(__i386__)
    #define TULIP_IOMAPPED
    #endif
    
    #if 0
    /* This enables KTR traces at KTR_DEV. */
    #define KTR_TULIP       KTR_DEV
    #else
    #define KTR_TULIP       0
   #endif
   
   #if 0
   /*
    * This turns on all sort of debugging stuff and make the
    * driver much larger.
    */
   #define TULIP_DEBUG
   #endif
   
   #if 0
   #define TULIP_PERFSTATS
   #endif
   
   #define TULIP_HZ        10
   
   #include <dev/de/if_devar.h>
   
   #define SYNC_NONE       0
   #define SYNC_RX         1
   #define SYNC_TX         2
   
   /*
    * This module supports
    *      the DEC 21040 PCI Ethernet Controller.
    *      the DEC 21041 PCI Ethernet Controller.
    *      the DEC 21140 PCI Fast Ethernet Controller.
    */
   static void     tulip_addr_filter(tulip_softc_t * const sc);
   static int      tulip_ifmedia_change(struct ifnet * const ifp);
   static void     tulip_ifmedia_status(struct ifnet * const ifp,
                       struct ifmediareq *req);
   static void     tulip_init(void *);
   static void     tulip_init_locked(tulip_softc_t * const sc);
   static void     tulip_intr_shared(void *arg);
   static void     tulip_intr_normal(void *arg);
   static void     tulip_mii_autonegotiate(tulip_softc_t * const sc,
                       const unsigned phyaddr);
   static int      tulip_mii_map_abilities(tulip_softc_t * const sc,
                       unsigned abilities);
   static tulip_media_t
                   tulip_mii_phy_readspecific(tulip_softc_t * const sc);
   static unsigned tulip_mii_readreg(tulip_softc_t * const sc, unsigned devaddr,
                       unsigned regno);
   static void     tulip_mii_writereg(tulip_softc_t * const sc, unsigned devaddr,
                       unsigned regno, unsigned data);
   static void     tulip_reset(tulip_softc_t * const sc);
   static void     tulip_rx_intr(tulip_softc_t * const sc);
   static int      tulip_srom_decode(tulip_softc_t * const sc);
   static void     tulip_start(struct ifnet *ifp);
   static void     tulip_start_locked(tulip_softc_t * const sc);
   static struct mbuf *
                   tulip_txput(tulip_softc_t * const sc, struct mbuf *m);
   static void     tulip_txput_setup(tulip_softc_t * const sc);
   struct mbuf *   tulip_dequeue_mbuf(tulip_ringinfo_t *ri, tulip_descinfo_t *di,
                       int sync);
   static void     tulip_dma_map_addr(void *, bus_dma_segment_t *, int, int);
   static void     tulip_dma_map_rxbuf(void *, bus_dma_segment_t *, int,
                       bus_size_t, int);
   
   static void
   tulip_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
   {
       bus_addr_t *paddr;
   
       if (error)
           return;
   
       paddr = arg;
       *paddr = segs->ds_addr;
   }
   
   static void
   tulip_dma_map_rxbuf(void *arg, bus_dma_segment_t *segs, int nseg,
       bus_size_t mapsize, int error)
   {
       tulip_desc_t *desc;
   
       if (error)
           return;
   
       desc = arg;
       KASSERT(nseg == 1, ("too many DMA segments"));
       KASSERT(segs[0].ds_len >= TULIP_RX_BUFLEN, ("receive buffer too small"));
   
       desc->d_addr1 = segs[0].ds_addr & 0xffffffff;
       desc->d_length1 = TULIP_RX_BUFLEN;
   #ifdef not_needed
       /* These should already always be zero. */
       desc->d_addr2 = 0;
       desc->d_length2 = 0;
   #endif
   }
   
   struct mbuf *
   tulip_dequeue_mbuf(tulip_ringinfo_t *ri, tulip_descinfo_t *di, int sync)
   {
       struct mbuf *m;
   
       m = di->di_mbuf;
       if (m != NULL) {
           switch (sync) {
           case SYNC_NONE:
               break;
           case SYNC_RX:
               TULIP_RXMAP_POSTSYNC(ri, di);
               break;
           case SYNC_TX:
               TULIP_TXMAP_POSTSYNC(ri, di);
               break;
           default:
               panic("bad sync flag: %d", sync);
           }
           bus_dmamap_unload(ri->ri_data_tag, *di->di_map);
           di->di_mbuf = NULL;
       }
       return (m);
   }
   
   static void
   tulip_timeout_callback(void *arg)
   {
       tulip_softc_t * const sc = arg;
   
       TULIP_PERFSTART(timeout)
       TULIP_LOCK_ASSERT(sc);
   
       sc->tulip_flags &= ~TULIP_TIMEOUTPENDING;
       sc->tulip_probe_timeout -= 1000 / TULIP_HZ;
       (sc->tulip_boardsw->bd_media_poll)(sc, TULIP_MEDIAPOLL_TIMER);
   
       TULIP_PERFEND(timeout);
   }
   
   static void
   tulip_timeout(tulip_softc_t * const sc)
   {
       TULIP_LOCK_ASSERT(sc);
       if (sc->tulip_flags & TULIP_TIMEOUTPENDING)
           return;
       sc->tulip_flags |= TULIP_TIMEOUTPENDING;
       callout_reset(&sc->tulip_callout, (hz + TULIP_HZ / 2) / TULIP_HZ,
           tulip_timeout_callback, sc);
   }
   
   static int
   tulip_txprobe(tulip_softc_t * const sc)
   {
       struct mbuf *m;
       u_char *enaddr;
   
       /*
        * Before we are sure this is the right media we need
        * to send a small packet to make sure there's carrier.
        * Strangely, BNC and AUI will "see" receive data if
        * either is connected so the transmit is the only way
        * to verify the connectivity.
        */
       TULIP_LOCK_ASSERT(sc);
       MGETHDR(m, M_DONTWAIT, MT_DATA);
       if (m == NULL)
           return 0;
       /*
        * Construct a LLC TEST message which will point to ourselves.
        */
       if (sc->tulip_ifp->if_input != NULL)
           enaddr = IF_LLADDR(sc->tulip_ifp);
       else
           enaddr = sc->tulip_enaddr;
       bcopy(enaddr, mtod(m, struct ether_header *)->ether_dhost, ETHER_ADDR_LEN);
       bcopy(enaddr, mtod(m, struct ether_header *)->ether_shost, ETHER_ADDR_LEN);
       mtod(m, struct ether_header *)->ether_type = htons(3);
       mtod(m, unsigned char *)[14] = 0;
       mtod(m, unsigned char *)[15] = 0;
       mtod(m, unsigned char *)[16] = 0xE3;        /* LLC Class1 TEST (no poll) */
       m->m_len = m->m_pkthdr.len = sizeof(struct ether_header) + 3;
       /*
        * send it!
        */
       sc->tulip_cmdmode |= TULIP_CMD_TXRUN;
       sc->tulip_intrmask |= TULIP_STS_TXINTR;
       sc->tulip_flags |= TULIP_TXPROBE_ACTIVE;
       TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode);
       TULIP_CSR_WRITE(sc, csr_intr, sc->tulip_intrmask);
       if ((m = tulip_txput(sc, m)) != NULL)
           m_freem(m);
       sc->tulip_probe.probe_txprobes++;
       return 1;
   }
   
   static void
   tulip_media_set(tulip_softc_t * const sc, tulip_media_t media)
   {
       const tulip_media_info_t *mi = sc->tulip_mediums[media];
   
       TULIP_LOCK_ASSERT(sc);
       if (mi == NULL)
           return;
   
       /*
        * If we are switching media, make sure we don't think there's
        * any stale RX activity
        */
       sc->tulip_flags &= ~TULIP_RXACT;
       if (mi->mi_type == TULIP_MEDIAINFO_SIA) {
           TULIP_CSR_WRITE(sc, csr_sia_connectivity, TULIP_SIACONN_RESET);
           TULIP_CSR_WRITE(sc, csr_sia_tx_rx,        mi->mi_sia_tx_rx);
           if (sc->tulip_features & TULIP_HAVE_SIAGP) {
               TULIP_CSR_WRITE(sc, csr_sia_general,  mi->mi_sia_gp_control|mi->mi_sia_general);
               DELAY(50);
               TULIP_CSR_WRITE(sc, csr_sia_general,  mi->mi_sia_gp_data|mi->mi_sia_general);
           } else {
               TULIP_CSR_WRITE(sc, csr_sia_general,  mi->mi_sia_general);
           }
           TULIP_CSR_WRITE(sc, csr_sia_connectivity, mi->mi_sia_connectivity);
       } else if (mi->mi_type == TULIP_MEDIAINFO_GPR) {
   #define TULIP_GPR_CMDBITS       (TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION|TULIP_CMD_SCRAMBLER|TULIP_CMD_TXTHRSHLDCTL)
           /*
            * If the cmdmode bits don't match the currently operating mode,
            * set the cmdmode appropriately and reset the chip.
            */
           if (((mi->mi_cmdmode ^ TULIP_CSR_READ(sc, csr_command)) & TULIP_GPR_CMDBITS) != 0) {
               sc->tulip_cmdmode &= ~TULIP_GPR_CMDBITS;
               sc->tulip_cmdmode |= mi->mi_cmdmode;
               tulip_reset(sc);
           }
           TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET|sc->tulip_gpinit);
           DELAY(10);
           TULIP_CSR_WRITE(sc, csr_gp, (u_int8_t) mi->mi_gpdata);
       } else if (mi->mi_type == TULIP_MEDIAINFO_SYM) {
           /*
            * If the cmdmode bits don't match the currently operating mode,
            * set the cmdmode appropriately and reset the chip.
            */
           if (((mi->mi_cmdmode ^ TULIP_CSR_READ(sc, csr_command)) & TULIP_GPR_CMDBITS) != 0) {
               sc->tulip_cmdmode &= ~TULIP_GPR_CMDBITS;
               sc->tulip_cmdmode |= mi->mi_cmdmode;
               tulip_reset(sc);
           }
           TULIP_CSR_WRITE(sc, csr_sia_general, mi->mi_gpcontrol);
           TULIP_CSR_WRITE(sc, csr_sia_general, mi->mi_gpdata);
       } else if (mi->mi_type == TULIP_MEDIAINFO_MII
                  && sc->tulip_probe_state != TULIP_PROBE_INACTIVE) {
           int idx;
           if (sc->tulip_features & TULIP_HAVE_SIAGP) {
               const u_int8_t *dp;
               dp = &sc->tulip_rombuf[mi->mi_reset_offset];
               for (idx = 0; idx < mi->mi_reset_length; idx++, dp += 2) {
                   DELAY(10);
                   TULIP_CSR_WRITE(sc, csr_sia_general, (dp[0] + 256 * dp[1]) << 16);
               }
               sc->tulip_phyaddr = mi->mi_phyaddr;
               dp = &sc->tulip_rombuf[mi->mi_gpr_offset];
               for (idx = 0; idx < mi->mi_gpr_length; idx++, dp += 2) {
                   DELAY(10);
                   TULIP_CSR_WRITE(sc, csr_sia_general, (dp[0] + 256 * dp[1]) << 16);
               }
           } else {
               for (idx = 0; idx < mi->mi_reset_length; idx++) {
                   DELAY(10);
                   TULIP_CSR_WRITE(sc, csr_gp, sc->tulip_rombuf[mi->mi_reset_offset + idx]);
               }
               sc->tulip_phyaddr = mi->mi_phyaddr;
               for (idx = 0; idx < mi->mi_gpr_length; idx++) {
                   DELAY(10);
                   TULIP_CSR_WRITE(sc, csr_gp, sc->tulip_rombuf[mi->mi_gpr_offset + idx]);
               }
           }
           if (sc->tulip_flags & TULIP_TRYNWAY) {
               tulip_mii_autonegotiate(sc, sc->tulip_phyaddr);
           } else if ((sc->tulip_flags & TULIP_DIDNWAY) == 0) {
               u_int32_t data = tulip_mii_readreg(sc, sc->tulip_phyaddr, PHYREG_CONTROL);
               data &= ~(PHYCTL_SELECT_100MB|PHYCTL_FULL_DUPLEX|PHYCTL_AUTONEG_ENABLE);
               sc->tulip_flags &= ~TULIP_DIDNWAY;
               if (TULIP_IS_MEDIA_FD(media))
                   data |= PHYCTL_FULL_DUPLEX;
               if (TULIP_IS_MEDIA_100MB(media))
                   data |= PHYCTL_SELECT_100MB;
               tulip_mii_writereg(sc, sc->tulip_phyaddr, PHYREG_CONTROL, data);
           }
       }
   }
   
   static void
   tulip_linkup(tulip_softc_t * const sc, tulip_media_t media)
   {
       TULIP_LOCK_ASSERT(sc);
       if ((sc->tulip_flags & TULIP_LINKUP) == 0)
           sc->tulip_flags |= TULIP_PRINTLINKUP;
       sc->tulip_flags |= TULIP_LINKUP;
       sc->tulip_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
   #if 0 /* XXX how does with work with ifmedia? */
       if ((sc->tulip_flags & TULIP_DIDNWAY) == 0) {
           if (sc->tulip_ifp->if_flags & IFF_FULLDUPLEX) {
               if (TULIP_CAN_MEDIA_FD(media)
                       && sc->tulip_mediums[TULIP_FD_MEDIA_OF(media)] != NULL)
                   media = TULIP_FD_MEDIA_OF(media);
           } else {
               if (TULIP_IS_MEDIA_FD(media)
                       && sc->tulip_mediums[TULIP_HD_MEDIA_OF(media)] != NULL)
                   media = TULIP_HD_MEDIA_OF(media);
           }
       }
   #endif
       if (sc->tulip_media != media) {
   #ifdef TULIP_DEBUG
           sc->tulip_dbg.dbg_last_media = sc->tulip_media;
   #endif
           sc->tulip_media = media;
           sc->tulip_flags |= TULIP_PRINTMEDIA;
           if (TULIP_IS_MEDIA_FD(sc->tulip_media)) {
               sc->tulip_cmdmode |= TULIP_CMD_FULLDUPLEX;
           } else if (sc->tulip_chipid != TULIP_21041 || (sc->tulip_flags & TULIP_DIDNWAY) == 0) {
               sc->tulip_cmdmode &= ~TULIP_CMD_FULLDUPLEX;
           }
       }
       /*
        * We could set probe_timeout to 0 but setting to 3000 puts this
        * in one central place and the only matters is tulip_link is
        * followed by a tulip_timeout.  Therefore setting it should not
        * result in aberrant behavour.
        */
       sc->tulip_probe_timeout = 3000;
       sc->tulip_probe_state = TULIP_PROBE_INACTIVE;
       sc->tulip_flags &= ~(TULIP_TXPROBE_ACTIVE|TULIP_TRYNWAY);
       if (sc->tulip_flags & TULIP_INRESET) {
           tulip_media_set(sc, sc->tulip_media);
       } else if (sc->tulip_probe_media != sc->tulip_media) {
           /*
            * No reason to change media if we have the right media.
            */
           tulip_reset(sc);
       }
       tulip_init_locked(sc);
   }
   
   static void
   tulip_media_print(tulip_softc_t * const sc)
   {
   
       TULIP_LOCK_ASSERT(sc);
       if ((sc->tulip_flags & TULIP_LINKUP) == 0)
           return;
       if (sc->tulip_flags & TULIP_PRINTMEDIA) {
           device_printf(sc->tulip_dev, "enabling %s port\n",
               tulip_mediums[sc->tulip_media]);
           sc->tulip_flags &= ~(TULIP_PRINTMEDIA|TULIP_PRINTLINKUP);
       } else if (sc->tulip_flags & TULIP_PRINTLINKUP) {
           device_printf(sc->tulip_dev, "link up\n");
           sc->tulip_flags &= ~TULIP_PRINTLINKUP;
       }
   }
   
   #if defined(TULIP_DO_GPR_SENSE)
   static tulip_media_t
   tulip_21140_gpr_media_sense(tulip_softc_t * const sc)
   {
       struct ifnet *ifp sc->tulip_ifp;
       tulip_media_t maybe_media = TULIP_MEDIA_UNKNOWN;
       tulip_media_t last_media = TULIP_MEDIA_UNKNOWN;
       tulip_media_t media;
   
       TULIP_LOCK_ASSERT(sc);
   
       /*
        * If one of the media blocks contained a default media flag,
        * use that.
        */
       for (media = TULIP_MEDIA_UNKNOWN; media < TULIP_MEDIA_MAX; media++) {
           const tulip_media_info_t *mi;
           /*
            * Media is not supported (or is full-duplex).
            */
           if ((mi = sc->tulip_mediums[media]) == NULL || TULIP_IS_MEDIA_FD(media))
               continue;
           if (mi->mi_type != TULIP_MEDIAINFO_GPR)
               continue;
   
           /*
            * Remember the media is this is the "default" media.
            */
           if (mi->mi_default && maybe_media == TULIP_MEDIA_UNKNOWN)
               maybe_media = media;
   
           /*
            * No activity mask?  Can't see if it is active if there's no mask.
            */
           if (mi->mi_actmask == 0)
               continue;
   
           /*
            * Does the activity data match?
            */
           if ((TULIP_CSR_READ(sc, csr_gp) & mi->mi_actmask) != mi->mi_actdata)
               continue;
   
   #if defined(TULIP_DEBUG)
           device_printf(sc->tulip_dev, "%s: %s: 0x%02x & 0x%02x == 0x%02x\n",
               __func__, tulip_mediums[media], TULIP_CSR_READ(sc, csr_gp) & 0xFF,
               mi->mi_actmask, mi->mi_actdata);
   #endif
           /*
            * It does!  If this is the first media we detected, then 
            * remember this media.  If isn't the first, then there were
            * multiple matches which we equate to no match (since we don't
            * which to select (if any).
            */
           if (last_media == TULIP_MEDIA_UNKNOWN) {
               last_media = media;
           } else if (last_media != media) {
               last_media = TULIP_MEDIA_UNKNOWN;
           }
       }
       return (last_media != TULIP_MEDIA_UNKNOWN) ? last_media : maybe_media;
   }
   #endif /* TULIP_DO_GPR_SENSE */
   
   static tulip_link_status_t
   tulip_media_link_monitor(tulip_softc_t * const sc)
   {
       const tulip_media_info_t * const mi = sc->tulip_mediums[sc->tulip_media];
       tulip_link_status_t linkup = TULIP_LINK_DOWN;
   
       TULIP_LOCK_ASSERT(sc);
       if (mi == NULL) {
   #if defined(DIAGNOSTIC) || defined(TULIP_DEBUG)
           panic("tulip_media_link_monitor: %s: botch at line %d\n",
                 tulip_mediums[sc->tulip_media],__LINE__);
   #else
           return TULIP_LINK_UNKNOWN;
   #endif
       }
   
   
       /*
        * Have we seen some packets?  If so, the link must be good.
        */
       if ((sc->tulip_flags & (TULIP_RXACT|TULIP_LINKUP)) == (TULIP_RXACT|TULIP_LINKUP)) {
           sc->tulip_flags &= ~TULIP_RXACT;
           sc->tulip_probe_timeout = 3000;
           return TULIP_LINK_UP;
       }
   
       sc->tulip_flags &= ~TULIP_RXACT;
       if (mi->mi_type == TULIP_MEDIAINFO_MII) {
           u_int32_t status;
           /*
            * Read the PHY status register.
            */
           status = tulip_mii_readreg(sc, sc->tulip_phyaddr, PHYREG_STATUS);
           if (status & PHYSTS_AUTONEG_DONE) {
               /*
                * If the PHY has completed autonegotiation, see the if the
                * remote systems abilities have changed.  If so, upgrade or
                * downgrade as appropriate.
                */
               u_int32_t abilities = tulip_mii_readreg(sc, sc->tulip_phyaddr, PHYREG_AUTONEG_ABILITIES);
               abilities = (abilities << 6) & status;
               if (abilities != sc->tulip_abilities) {
   #if defined(TULIP_DEBUG)
                   loudprintf("%s(phy%d): autonegotiation changed: 0x%04x -> 0x%04x\n",
                              ifp->if_xname, sc->tulip_phyaddr,
                              sc->tulip_abilities, abilities);
   #endif
                   if (tulip_mii_map_abilities(sc, abilities)) {
                       tulip_linkup(sc, sc->tulip_probe_media);
                       return TULIP_LINK_UP;
                   }
                   /*
                    * if we had selected media because of autonegotiation,
                    * we need to probe for the new media.
                    */
                   sc->tulip_probe_state = TULIP_PROBE_INACTIVE;
                   if (sc->tulip_flags & TULIP_DIDNWAY)
                       return TULIP_LINK_DOWN;
               }
           }
           /*
            * The link is now up.  If was down, say its back up.
            */
           if ((status & (PHYSTS_LINK_UP|PHYSTS_REMOTE_FAULT)) == PHYSTS_LINK_UP)
               linkup = TULIP_LINK_UP;
       } else if (mi->mi_type == TULIP_MEDIAINFO_GPR) {
           /*
            * No activity sensor?  Assume all's well.
            */
           if (mi->mi_actmask == 0)
               return TULIP_LINK_UNKNOWN;
           /*
            * Does the activity data match?
            */
           if ((TULIP_CSR_READ(sc, csr_gp) & mi->mi_actmask) == mi->mi_actdata)
               linkup = TULIP_LINK_UP;
       } else if (mi->mi_type == TULIP_MEDIAINFO_SIA) {
           /*
            * Assume non TP ok for now.
            */
           if (!TULIP_IS_MEDIA_TP(sc->tulip_media))
               return TULIP_LINK_UNKNOWN;
           if ((TULIP_CSR_READ(sc, csr_sia_status) & TULIP_SIASTS_LINKFAIL) == 0)
               linkup = TULIP_LINK_UP;
   #if defined(TULIP_DEBUG)
           if (sc->tulip_probe_timeout <= 0)
               device_printf(sc->tulip_dev, "sia status = 0x%08x\n",
                       TULIP_CSR_READ(sc, csr_sia_status));
   #endif
       } else if (mi->mi_type == TULIP_MEDIAINFO_SYM) {
           return TULIP_LINK_UNKNOWN;
       }
       /*
        * We will wait for 3 seconds until the link goes into suspect mode.
        */
       if (sc->tulip_flags & TULIP_LINKUP) {
           if (linkup == TULIP_LINK_UP)
               sc->tulip_probe_timeout = 3000;
           if (sc->tulip_probe_timeout > 0)
               return TULIP_LINK_UP;
   
           sc->tulip_flags &= ~TULIP_LINKUP;
           device_printf(sc->tulip_dev, "link down: cable problem?\n");
       }
   #if defined(TULIP_DEBUG)
       sc->tulip_dbg.dbg_link_downed++;
   #endif
       return TULIP_LINK_DOWN;
   }
   
   static void
   tulip_media_poll(tulip_softc_t * const sc, tulip_mediapoll_event_t event)
   {
   
       TULIP_LOCK_ASSERT(sc);
   #if defined(TULIP_DEBUG)
       sc->tulip_dbg.dbg_events[event]++;
   #endif
       if (sc->tulip_probe_state == TULIP_PROBE_INACTIVE
               && event == TULIP_MEDIAPOLL_TIMER) {
           switch (tulip_media_link_monitor(sc)) {
               case TULIP_LINK_DOWN: {
                   /*
                    * Link Monitor failed.  Probe for new media.
                    */
                   event = TULIP_MEDIAPOLL_LINKFAIL;
                   break;
               }
               case TULIP_LINK_UP: {
                   /*
                    * Check again soon.
                    */
                   tulip_timeout(sc);
                   return;
               }
               case TULIP_LINK_UNKNOWN: {
                   /*
                    * We can't tell so don't bother.
                    */
                   return;
               }
           }
       }
   
       if (event == TULIP_MEDIAPOLL_LINKFAIL) {
           if (sc->tulip_probe_state == TULIP_PROBE_INACTIVE) {
               if (TULIP_DO_AUTOSENSE(sc)) {
   #if defined(TULIP_DEBUG)
                   sc->tulip_dbg.dbg_link_failures++;
   #endif
                   sc->tulip_media = TULIP_MEDIA_UNKNOWN;
                   if (sc->tulip_ifp->if_flags & IFF_UP)
                       tulip_reset(sc);    /* restart probe */
               }
               return;
           }
   #if defined(TULIP_DEBUG)
           sc->tulip_dbg.dbg_link_pollintrs++;
   #endif
       }
   
       if (event == TULIP_MEDIAPOLL_START) {
           sc->tulip_ifp->if_drv_flags |= IFF_DRV_OACTIVE;
           if (sc->tulip_probe_state != TULIP_PROBE_INACTIVE)
               return;
           sc->tulip_probe_mediamask = 0;
           sc->tulip_probe_passes = 0;
   #if defined(TULIP_DEBUG)
           sc->tulip_dbg.dbg_media_probes++;
   #endif
           /*
            * If the SROM contained an explicit media to use, use it.
            */
           sc->tulip_cmdmode &= ~(TULIP_CMD_RXRUN|TULIP_CMD_FULLDUPLEX);
           sc->tulip_flags |= TULIP_TRYNWAY|TULIP_PROBE1STPASS;
           sc->tulip_flags &= ~(TULIP_DIDNWAY|TULIP_PRINTMEDIA|TULIP_PRINTLINKUP);
           /*
            * connidx is defaulted to a media_unknown type.
            */
           sc->tulip_probe_media = tulip_srom_conninfo[sc->tulip_connidx].sc_media;
           if (sc->tulip_probe_media != TULIP_MEDIA_UNKNOWN) {
               tulip_linkup(sc, sc->tulip_probe_media);
               tulip_timeout(sc);
               return;
           }
   
           if (sc->tulip_features & TULIP_HAVE_GPR) {
               sc->tulip_probe_state = TULIP_PROBE_GPRTEST;
               sc->tulip_probe_timeout = 2000;
           } else {
               sc->tulip_probe_media = TULIP_MEDIA_MAX;
               sc->tulip_probe_timeout = 0;
               sc->tulip_probe_state = TULIP_PROBE_MEDIATEST;
           }
       }
   
       /*
        * Ignore txprobe failures or spurious callbacks.
        */
       if (event == TULIP_MEDIAPOLL_TXPROBE_FAILED
               && sc->tulip_probe_state != TULIP_PROBE_MEDIATEST) {
           sc->tulip_flags &= ~TULIP_TXPROBE_ACTIVE;
           return;
       }
   
       /*
        * If we really transmitted a packet, then that's the media we'll use.
        */
       if (event == TULIP_MEDIAPOLL_TXPROBE_OK || event == TULIP_MEDIAPOLL_LINKPASS) {
           if (event == TULIP_MEDIAPOLL_LINKPASS) {
               /* XXX Check media status just to be sure */
               sc->tulip_probe_media = TULIP_MEDIA_10BASET;
   #if defined(TULIP_DEBUG)
           } else {
               sc->tulip_dbg.dbg_txprobes_ok[sc->tulip_probe_media]++;
   #endif
           }
           tulip_linkup(sc, sc->tulip_probe_media);
           tulip_timeout(sc);
           return;
       }
   
       if (sc->tulip_probe_state == TULIP_PROBE_GPRTEST) {
   #if defined(TULIP_DO_GPR_SENSE)
           /*
            * Check for media via the general purpose register.
            *
            * Try to sense the media via the GPR.  If the same value
            * occurs 3 times in a row then just use that.
            */
           if (sc->tulip_probe_timeout > 0) {
               tulip_media_t new_probe_media = tulip_21140_gpr_media_sense(sc);
   #if defined(TULIP_DEBUG)
               device_printf(sc->tulip_dev, "%s: gpr sensing = %s\n", __func__,
                      tulip_mediums[new_probe_media]);
   #endif
               if (new_probe_media != TULIP_MEDIA_UNKNOWN) {
                   if (new_probe_media == sc->tulip_probe_media) {
                       if (--sc->tulip_probe_count == 0)
                           tulip_linkup(sc, sc->tulip_probe_media);
                   } else {
                       sc->tulip_probe_count = 10;
                   }
               }
               sc->tulip_probe_media = new_probe_media;
               tulip_timeout(sc);
               return;
           }
   #endif /* TULIP_DO_GPR_SENSE */
           /*
            * Brute force.  We cycle through each of the media types
            * and try to transmit a packet.
            */
           sc->tulip_probe_state = TULIP_PROBE_MEDIATEST;
           sc->tulip_probe_media = TULIP_MEDIA_MAX;
           sc->tulip_probe_timeout = 0;
           tulip_timeout(sc);
           return;
       }
   
       if (sc->tulip_probe_state != TULIP_PROBE_MEDIATEST
              && (sc->tulip_features & TULIP_HAVE_MII)) {
           tulip_media_t old_media = sc->tulip_probe_media;
           tulip_mii_autonegotiate(sc, sc->tulip_phyaddr);
           switch (sc->tulip_probe_state) {
               case TULIP_PROBE_FAILED:
               case TULIP_PROBE_MEDIATEST: {
                   /*
                    * Try the next media.
                    */
                   sc->tulip_probe_mediamask |= sc->tulip_mediums[sc->tulip_probe_media]->mi_mediamask;
                   sc->tulip_probe_timeout = 0;
   #ifdef notyet
                   if (sc->tulip_probe_state == TULIP_PROBE_FAILED)
                       break;
                   if (sc->tulip_probe_media != tulip_mii_phy_readspecific(sc))
                       break;
                   sc->tulip_probe_timeout = TULIP_IS_MEDIA_TP(sc->tulip_probe_media) ? 2500 : 300;
   #endif
                   break;
               }
               case TULIP_PROBE_PHYAUTONEG: {
                   return;
               }
               case TULIP_PROBE_INACTIVE: {
                   /*
                    * Only probe if we autonegotiated a media that hasn't failed.
                    */
                   sc->tulip_probe_timeout = 0;
                   if (sc->tulip_probe_mediamask & TULIP_BIT(sc->tulip_probe_media)) {
                       sc->tulip_probe_media = old_media;
                       break;
                   }
                   tulip_linkup(sc, sc->tulip_probe_media);
                   tulip_timeout(sc);
                   return;
               }
               default: {
   #if defined(DIAGNOSTIC) || defined(TULIP_DEBUG)
                   panic("tulip_media_poll: botch at line %d\n", __LINE__);
   #endif
                   break;
               }
           }
       }
   
       if (event == TULIP_MEDIAPOLL_TXPROBE_FAILED) {
   #if defined(TULIP_DEBUG)
           sc->tulip_dbg.dbg_txprobes_failed[sc->tulip_probe_media]++;
   #endif
           sc->tulip_flags &= ~TULIP_TXPROBE_ACTIVE;
           return;
       }
   
       /*
        * switch to another media if we tried this one enough.
        */
       if (/* event == TULIP_MEDIAPOLL_TXPROBE_FAILED || */ sc->tulip_probe_timeout <= 0) {
   #if defined(TULIP_DEBUG)
           if (sc->tulip_probe_media == TULIP_MEDIA_UNKNOWN) {
               device_printf(sc->tulip_dev, "poll media unknown!\n");
               sc->tulip_probe_media = TULIP_MEDIA_MAX;
           }
   #endif
           /*
            * Find the next media type to check for.  Full Duplex
            * types are not allowed.
            */
           do {
               sc->tulip_probe_media -= 1;
               if (sc->tulip_probe_media == TULIP_MEDIA_UNKNOWN) {
                   if (++sc->tulip_probe_passes == 3) {
                       device_printf(sc->tulip_dev,
                           "autosense failed: cable problem?\n");
                       if ((sc->tulip_ifp->if_flags & IFF_UP) == 0) {
                           sc->tulip_ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
                           sc->tulip_probe_state = TULIP_PROBE_INACTIVE;
                           return;
                       }
                   }
                   sc->tulip_flags ^= TULIP_TRYNWAY;       /* XXX */
                   sc->tulip_probe_mediamask = 0;
                   sc->tulip_probe_media = TULIP_MEDIA_MAX - 1;
               }
           } while (sc->tulip_mediums[sc->tulip_probe_media] == NULL
                    || (sc->tulip_probe_mediamask & TULIP_BIT(sc->tulip_probe_media))
                    || TULIP_IS_MEDIA_FD(sc->tulip_probe_media));
   
   #if defined(TULIP_DEBUG)
           device_printf(sc->tulip_dev, "%s: probing %s\n",
                  event == TULIP_MEDIAPOLL_TXPROBE_FAILED ? "txprobe failed" : "timeout",
                  tulip_mediums[sc->tulip_probe_media]);
   #endif
           sc->tulip_probe_timeout = TULIP_IS_MEDIA_TP(sc->tulip_probe_media) ? 2500 : 1000;
           sc->tulip_probe_state = TULIP_PROBE_MEDIATEST;
           sc->tulip_probe.probe_txprobes = 0;
           tulip_reset(sc);
           tulip_media_set(sc, sc->tulip_probe_media);
           sc->tulip_flags &= ~TULIP_TXPROBE_ACTIVE;
       }
       tulip_timeout(sc);
   
       /*
        * If this is hanging off a phy, we know are doing NWAY and we have
        * forced the phy to a specific speed.  Wait for link up before
        * before sending a packet.
        */
       switch (sc->tulip_mediums[sc->tulip_probe_media]->mi_type) {
           case TULIP_MEDIAINFO_MII: {
               if (sc->tulip_probe_media != tulip_mii_phy_readspecific(sc))
                   return;
               break;
           }
           case TULIP_MEDIAINFO_SIA: {
               if (TULIP_IS_MEDIA_TP(sc->tulip_probe_media)) {
                   if (TULIP_CSR_READ(sc, csr_sia_status) & TULIP_SIASTS_LINKFAIL)
                       return;
                   tulip_linkup(sc, sc->tulip_probe_media);
   #ifdef notyet
                   if (sc->tulip_features & TULIP_HAVE_MII)
                       tulip_timeout(sc);
   #endif
                   return;
               }
               break;
           }
           case TULIP_MEDIAINFO_RESET:
           case TULIP_MEDIAINFO_SYM:
           case TULIP_MEDIAINFO_NONE:
           case TULIP_MEDIAINFO_GPR: {
               break;
           }
       }
       /*
        * Try to send a packet.
        */
       tulip_txprobe(sc);
   }
   
   static void
   tulip_media_select(tulip_softc_t * const sc)
   {
       TULIP_LOCK_ASSERT(sc);
       if (sc->tulip_features & TULIP_HAVE_GPR) {
           TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET|sc->tulip_gpinit);
           DELAY(10);
           TULIP_CSR_WRITE(sc, csr_gp, sc->tulip_gpdata);
       }
       /*
        * If this board has no media, just return
        */
       if (sc->tulip_features & TULIP_HAVE_NOMEDIA)
           return;
   
       if (sc->tulip_media == TULIP_MEDIA_UNKNOWN) {
           TULIP_CSR_WRITE(sc, csr_intr, sc->tulip_intrmask);
           (*sc->tulip_boardsw->bd_media_poll)(sc, TULIP_MEDIAPOLL_START);
       } else {
           tulip_media_set(sc, sc->tulip_media);
       }
   }
   
   static void
   tulip_21040_mediainfo_init(tulip_softc_t * const sc, tulip_media_t media)
   {
       TULIP_LOCK_ASSERT(sc);
       sc->tulip_cmdmode |= TULIP_CMD_CAPTREFFCT|TULIP_CMD_THRSHLD160
           |TULIP_CMD_BACKOFFCTR;
       sc->tulip_ifp->if_baudrate = 10000000;
   
       if (media == TULIP_MEDIA_10BASET || media == TULIP_MEDIA_UNKNOWN) {
           TULIP_MEDIAINFO_SIA_INIT(sc, &sc->tulip_mediainfo[0], 21040, 10BASET);
           TULIP_MEDIAINFO_SIA_INIT(sc, &sc->tulip_mediainfo[1], 21040, 10BASET_FD);
           sc->tulip_intrmask |= TULIP_STS_LINKPASS|TULIP_STS_LINKFAIL;
       }
   
       if (media == TULIP_MEDIA_AUIBNC || media == TULIP_MEDIA_UNKNOWN) {
           TULIP_MEDIAINFO_SIA_INIT(sc, &sc->tulip_mediainfo[2], 21040, AUIBNC);
       }
   
       if (media == TULIP_MEDIA_UNKNOWN) {
           TULIP_MEDIAINFO_SIA_INIT(sc, &sc->tulip_mediainfo[3], 21040, EXTSIA);
       }
   }
   
   static void
   tulip_21040_media_probe(tulip_softc_t * const sc)
   {
       TULIP_LOCK_ASSERT(sc);
       tulip_21040_mediainfo_init(sc, TULIP_MEDIA_UNKNOWN);
       return;
   }
   
   static void
   tulip_21040_10baset_only_media_probe(tulip_softc_t * const sc)
   {
       TULIP_LOCK_ASSERT(sc);
       tulip_21040_mediainfo_init(sc, TULIP_MEDIA_10BASET);
       tulip_media_set(sc, TULIP_MEDIA_10BASET);
       sc->tulip_media = TULIP_MEDIA_10BASET;
   }
   
   static void
   tulip_21040_10baset_only_media_select(tulip_softc_t * const sc)
   {
       TULIP_LOCK_ASSERT(sc);
       sc->tulip_flags |= TULIP_LINKUP;
       if (sc->tulip_media == TULIP_MEDIA_10BASET_FD) {
           sc->tulip_cmdmode |= TULIP_CMD_FULLDUPLEX;
           sc->tulip_flags &= ~TULIP_SQETEST;
       } else {
           sc->tulip_cmdmode &= ~TULIP_CMD_FULLDUPLEX;
           sc->tulip_flags |= TULIP_SQETEST;
       }
       tulip_media_set(sc, sc->tulip_media);
   }
   
   static void
   tulip_21040_auibnc_only_media_probe(tulip_softc_t * const sc)
   {
       TULIP_LOCK_ASSERT(sc);
       tulip_21040_mediainfo_init(sc, TULIP_MEDIA_AUIBNC);
       sc->tulip_flags |= TULIP_SQETEST|TULIP_LINKUP;
      tulip_media_set(sc, TULIP_MEDIA_AUIBNC);
      sc->tulip_media = TULIP_MEDIA_AUIBNC;
  }
  
  static void
  tulip_21040_auibnc_only_media_select(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      tulip_media_set(sc, TULIP_MEDIA_AUIBNC);
      sc->tulip_cmdmode &= ~TULIP_CMD_FULLDUPLEX;
  }
  
  static const tulip_boardsw_t tulip_21040_boardsw = {
      TULIP_21040_GENERIC,
      tulip_21040_media_probe,
      tulip_media_select,
      tulip_media_poll,
  };
  
  static const tulip_boardsw_t tulip_21040_10baset_only_boardsw = {
      TULIP_21040_GENERIC,
      tulip_21040_10baset_only_media_probe,
      tulip_21040_10baset_only_media_select,
      NULL,
  };
  
  static const tulip_boardsw_t tulip_21040_auibnc_only_boardsw = {
      TULIP_21040_GENERIC,
      tulip_21040_auibnc_only_media_probe,
      tulip_21040_auibnc_only_media_select,
      NULL,
  };
  
  static void
  tulip_21041_mediainfo_init(tulip_softc_t * const sc)
  {
      tulip_media_info_t * const mi = sc->tulip_mediainfo;
  
      TULIP_LOCK_ASSERT(sc);
  #ifdef notyet
      if (sc->tulip_revinfo >= 0x20) {
          TULIP_MEDIAINFO_SIA_INIT(sc, &mi[0], 21041P2, 10BASET);
          TULIP_MEDIAINFO_SIA_INIT(sc, &mi[1], 21041P2, 10BASET_FD);
          TULIP_MEDIAINFO_SIA_INIT(sc, &mi[0], 21041P2, AUI);
          TULIP_MEDIAINFO_SIA_INIT(sc, &mi[1], 21041P2, BNC);
          return;
      }
  #endif
      TULIP_MEDIAINFO_SIA_INIT(sc, &mi[0], 21041, 10BASET);
      TULIP_MEDIAINFO_SIA_INIT(sc, &mi[1], 21041, 10BASET_FD);
      TULIP_MEDIAINFO_SIA_INIT(sc, &mi[2], 21041, AUI);
      TULIP_MEDIAINFO_SIA_INIT(sc, &mi[3], 21041, BNC);
  }
  
  static void
  tulip_21041_media_probe(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_ifp->if_baudrate = 10000000;
      sc->tulip_cmdmode |= TULIP_CMD_CAPTREFFCT|TULIP_CMD_ENHCAPTEFFCT
          |TULIP_CMD_THRSHLD160|TULIP_CMD_BACKOFFCTR;
      sc->tulip_intrmask |= TULIP_STS_LINKPASS|TULIP_STS_LINKFAIL;
      tulip_21041_mediainfo_init(sc);
  }
  
  static void
  tulip_21041_media_poll(tulip_softc_t * const sc,
      const tulip_mediapoll_event_t event)
  {
      u_int32_t sia_status;
  
      TULIP_LOCK_ASSERT(sc);
  #if defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_events[event]++;
  #endif
  
      if (event == TULIP_MEDIAPOLL_LINKFAIL) {
          if (sc->tulip_probe_state != TULIP_PROBE_INACTIVE
                  || !TULIP_DO_AUTOSENSE(sc))
              return;
          sc->tulip_media = TULIP_MEDIA_UNKNOWN;
          tulip_reset(sc);        /* start probe */
          return;
      }
  
      /*
       * If we've been been asked to start a poll or link change interrupt
       * restart the probe (and reset the tulip to a known state).
       */
      if (event == TULIP_MEDIAPOLL_START) {
          sc->tulip_ifp->if_drv_flags |= IFF_DRV_OACTIVE;
          sc->tulip_cmdmode &= ~(TULIP_CMD_FULLDUPLEX|TULIP_CMD_RXRUN);
  #ifdef notyet
          if (sc->tulip_revinfo >= 0x20) {
              sc->tulip_cmdmode |= TULIP_CMD_FULLDUPLEX;
              sc->tulip_flags |= TULIP_DIDNWAY;
          }
  #endif
          TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode);
          sc->tulip_probe_state = TULIP_PROBE_MEDIATEST;
          sc->tulip_probe_media = TULIP_MEDIA_10BASET;
          sc->tulip_probe_timeout = TULIP_21041_PROBE_10BASET_TIMEOUT;
          tulip_media_set(sc, TULIP_MEDIA_10BASET);
          tulip_timeout(sc);
          return;
      }
  
      if (sc->tulip_probe_state == TULIP_PROBE_INACTIVE)
          return;
  
      if (event == TULIP_MEDIAPOLL_TXPROBE_OK) {
  #if defined(TULIP_DEBUG)
          sc->tulip_dbg.dbg_txprobes_ok[sc->tulip_probe_media]++;
  #endif
          tulip_linkup(sc, sc->tulip_probe_media);
          return;
      }
  
      sia_status = TULIP_CSR_READ(sc, csr_sia_status);
      TULIP_CSR_WRITE(sc, csr_sia_status, sia_status);
      if ((sia_status & TULIP_SIASTS_LINKFAIL) == 0) {
          if (sc->tulip_revinfo >= 0x20) {
              if (sia_status & (PHYSTS_10BASET_FD << (16 - 6)))
                  sc->tulip_probe_media = TULIP_MEDIA_10BASET_FD;
          }
          /*
           * If the link has passed LinkPass, 10baseT is the
           * proper media to use.
           */
          tulip_linkup(sc, sc->tulip_probe_media);
          return;
      }
  
      /*
       * wait for up to 2.4 seconds for the link to reach pass state.
       * Only then start scanning the other media for activity.
       * choose media with receive activity over those without.
       */
      if (sc->tulip_probe_media == TULIP_MEDIA_10BASET) {
          if (event != TULIP_MEDIAPOLL_TIMER)
              return;
          if (sc->tulip_probe_timeout > 0
                  && (sia_status & TULIP_SIASTS_OTHERRXACTIVITY) == 0) {
              tulip_timeout(sc);
              return;
          }
          sc->tulip_probe_timeout = TULIP_21041_PROBE_AUIBNC_TIMEOUT;
          sc->tulip_flags |= TULIP_WANTRXACT;
          if (sia_status & TULIP_SIASTS_OTHERRXACTIVITY) {
              sc->tulip_probe_media = TULIP_MEDIA_BNC;
          } else {
              sc->tulip_probe_media = TULIP_MEDIA_AUI;
          }
          tulip_media_set(sc, sc->tulip_probe_media);
          tulip_timeout(sc);
          return;
      }
  
      /*
       * If we failed, clear the txprobe active flag.
       */
      if (event == TULIP_MEDIAPOLL_TXPROBE_FAILED)
          sc->tulip_flags &= ~TULIP_TXPROBE_ACTIVE;
  
  
      if (event == TULIP_MEDIAPOLL_TIMER) {
          /*
           * If we've received something, then that's our link!
           */
          if (sc->tulip_flags & TULIP_RXACT) {
              tulip_linkup(sc, sc->tulip_probe_media);
              return;
          }
          /*
           * if no txprobe active  
           */
          if ((sc->tulip_flags & TULIP_TXPROBE_ACTIVE) == 0
                  && ((sc->tulip_flags & TULIP_WANTRXACT) == 0
                      || (sia_status & TULIP_SIASTS_RXACTIVITY))) {
              sc->tulip_probe_timeout = TULIP_21041_PROBE_AUIBNC_TIMEOUT;
              tulip_txprobe(sc);
              tulip_timeout(sc);
              return;
          }
          /*
           * Take 2 passes through before deciding to not
           * wait for receive activity.  Then take another
           * two passes before spitting out a warning.
           */
          if (sc->tulip_probe_timeout <= 0) {
              if (sc->tulip_flags & TULIP_WANTRXACT) {
                  sc->tulip_flags &= ~TULIP_WANTRXACT;
                  sc->tulip_probe_timeout = TULIP_21041_PROBE_AUIBNC_TIMEOUT;
              } else {
                  device_printf(sc->tulip_dev,
                      "autosense failed: cable problem?\n");
                  if ((sc->tulip_ifp->if_flags & IFF_UP) == 0) {
                      sc->tulip_ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
                      sc->tulip_probe_state = TULIP_PROBE_INACTIVE;
                      return;
                  }
              }
          }
      }
      
      /*
       * Since this media failed to probe, try the other one.
       */
      sc->tulip_probe_timeout = TULIP_21041_PROBE_AUIBNC_TIMEOUT;
      if (sc->tulip_probe_media == TULIP_MEDIA_AUI) {
          sc->tulip_probe_media = TULIP_MEDIA_BNC;
      } else {
          sc->tulip_probe_media = TULIP_MEDIA_AUI;
      }
      tulip_media_set(sc, sc->tulip_probe_media);
      sc->tulip_flags &= ~TULIP_TXPROBE_ACTIVE;
      tulip_timeout(sc);
  }
  
  static const tulip_boardsw_t tulip_21041_boardsw = {
      TULIP_21041_GENERIC,
      tulip_21041_media_probe,
      tulip_media_select,
      tulip_21041_media_poll
  };
  
  static const tulip_phy_attr_t tulip_mii_phy_attrlist[] = {
      { 0x20005c00, 0,            /* 08-00-17 */
        {
          { 0x19, 0x0040, 0x0040 },       /* 10TX */
          { 0x19, 0x0040, 0x0000 },       /* 100TX */
        },
  #if defined(TULIP_DEBUG)
        "NS DP83840",
  #endif
      },
      { 0x0281F400, 0,            /* 00-A0-7D */
        {
          { 0x12, 0x0010, 0x0000 },       /* 10T */
          { },                            /* 100TX */
          { 0x12, 0x0010, 0x0010 },       /* 100T4 */
          { 0x12, 0x0008, 0x0008 },       /* FULL_DUPLEX */
        },
  #if defined(TULIP_DEBUG)
        "Seeq 80C240"
  #endif
      },
  #if 0
      { 0x0015F420, 0,    /* 00-A0-7D */
        {
          { 0x12, 0x0010, 0x0000 },       /* 10T */
          { },                            /* 100TX */
          { 0x12, 0x0010, 0x0010 },       /* 100T4 */
          { 0x12, 0x0008, 0x0008 },       /* FULL_DUPLEX */
        },
  #if defined(TULIP_DEBUG)
        "Broadcom BCM5000"
  #endif
      },
  #endif
      { 0x0281F400, 0,            /* 00-A0-BE */
        {
          { 0x11, 0x8000, 0x0000 },       /* 10T */
          { 0x11, 0x8000, 0x8000 },       /* 100TX */
          { },                            /* 100T4 */
          { 0x11, 0x4000, 0x4000 },       /* FULL_DUPLEX */
        },
  #if defined(TULIP_DEBUG)
        "ICS 1890"
  #endif 
      },
      { 0 }
  };
  
  static tulip_media_t
  tulip_mii_phy_readspecific(tulip_softc_t * const sc)
  {
      const tulip_phy_attr_t *attr;
      u_int16_t data;
      u_int32_t id;
      unsigned idx = 0;
      static const tulip_media_t table[] = {
          TULIP_MEDIA_UNKNOWN,
          TULIP_MEDIA_10BASET,
          TULIP_MEDIA_100BASETX,
          TULIP_MEDIA_100BASET4,
          TULIP_MEDIA_UNKNOWN,
          TULIP_MEDIA_10BASET_FD,
          TULIP_MEDIA_100BASETX_FD,
          TULIP_MEDIA_UNKNOWN
      };
  
      TULIP_LOCK_ASSERT(sc);
  
      /*
       * Don't read phy specific registers if link is not up.
       */
      data = tulip_mii_readreg(sc, sc->tulip_phyaddr, PHYREG_STATUS);
      if ((data & (PHYSTS_LINK_UP|PHYSTS_EXTENDED_REGS)) != (PHYSTS_LINK_UP|PHYSTS_EXTENDED_REGS))
          return TULIP_MEDIA_UNKNOWN;
  
      id = (tulip_mii_readreg(sc, sc->tulip_phyaddr, PHYREG_IDLOW) << 16) |
          tulip_mii_readreg(sc, sc->tulip_phyaddr, PHYREG_IDHIGH);
      for (attr = tulip_mii_phy_attrlist;; attr++) {
          if (attr->attr_id == 0)
              return TULIP_MEDIA_UNKNOWN;
          if ((id & ~0x0F) == attr->attr_id)
              break;
      }
  
      if (attr->attr_modes[PHY_MODE_100TX].pm_regno) {
          const tulip_phy_modedata_t * const pm = &attr->attr_modes[PHY_MODE_100TX];
          data = tulip_mii_readreg(sc, sc->tulip_phyaddr, pm->pm_regno);
          if ((data & pm->pm_mask) == pm->pm_value)
              idx = 2;
      }
      if (idx == 0 && attr->attr_modes[PHY_MODE_100T4].pm_regno) {
          const tulip_phy_modedata_t * const pm = &attr->attr_modes[PHY_MODE_100T4];
          data = tulip_mii_readreg(sc, sc->tulip_phyaddr, pm->pm_regno);
          if ((data & pm->pm_mask) == pm->pm_value)
              idx = 3;
      }
      if (idx == 0 && attr->attr_modes[PHY_MODE_10T].pm_regno) {
          const tulip_phy_modedata_t * const pm = &attr->attr_modes[PHY_MODE_10T];
          data = tulip_mii_readreg(sc, sc->tulip_phyaddr, pm->pm_regno);
          if ((data & pm->pm_mask) == pm->pm_value)
              idx = 1;
      } 
      if (idx != 0 && attr->attr_modes[PHY_MODE_FULLDUPLEX].pm_regno) {
          const tulip_phy_modedata_t * const pm = &attr->attr_modes[PHY_MODE_FULLDUPLEX];
          data = tulip_mii_readreg(sc, sc->tulip_phyaddr, pm->pm_regno);
          idx += ((data & pm->pm_mask) == pm->pm_value ? 4 : 0);
      }
      return table[idx];
  }
  
  static unsigned
  tulip_mii_get_phyaddr(tulip_softc_t * const sc, unsigned offset)
  {
      unsigned phyaddr;
  
      TULIP_LOCK_ASSERT(sc);
      for (phyaddr = 1; phyaddr < 32; phyaddr++) {
          unsigned status = tulip_mii_readreg(sc, phyaddr, PHYREG_STATUS);
          if (status == 0 || status == 0xFFFF || status < PHYSTS_10BASET)
              continue;
          if (offset == 0)
              return phyaddr;
          offset--;
      }
      if (offset == 0) {
          unsigned status = tulip_mii_readreg(sc, 0, PHYREG_STATUS);
          if (status == 0 || status == 0xFFFF || status < PHYSTS_10BASET)
              return TULIP_MII_NOPHY;
          return 0;
      }
      return TULIP_MII_NOPHY;
  }
  
  static int
  tulip_mii_map_abilities(tulip_softc_t * const sc, unsigned abilities)
  {
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_abilities = abilities;
      if (abilities & PHYSTS_100BASETX_FD) {
          sc->tulip_probe_media = TULIP_MEDIA_100BASETX_FD;
      } else if (abilities & PHYSTS_100BASET4) {
          sc->tulip_probe_media = TULIP_MEDIA_100BASET4;
      } else if (abilities & PHYSTS_100BASETX) {
          sc->tulip_probe_media = TULIP_MEDIA_100BASETX;
      } else if (abilities & PHYSTS_10BASET_FD) {
          sc->tulip_probe_media = TULIP_MEDIA_10BASET_FD;
      } else if (abilities & PHYSTS_10BASET) {
          sc->tulip_probe_media = TULIP_MEDIA_10BASET;
      } else {
          sc->tulip_probe_state = TULIP_PROBE_MEDIATEST;
          return 0;
      }
      sc->tulip_probe_state = TULIP_PROBE_INACTIVE;
      return 1;
  }
  
  static void
  tulip_mii_autonegotiate(tulip_softc_t * const sc, const unsigned phyaddr)
  {
      struct ifnet *ifp = sc->tulip_ifp;
  
      TULIP_LOCK_ASSERT(sc);
      switch (sc->tulip_probe_state) {
          case TULIP_PROBE_MEDIATEST:
          case TULIP_PROBE_INACTIVE: {
              sc->tulip_flags |= TULIP_DIDNWAY;
              tulip_mii_writereg(sc, phyaddr, PHYREG_CONTROL, PHYCTL_RESET);
              sc->tulip_probe_timeout = 3000;
              sc->tulip_intrmask |= TULIP_STS_ABNRMLINTR|TULIP_STS_NORMALINTR;
              sc->tulip_probe_state = TULIP_PROBE_PHYRESET;
          }
          /* FALLTHROUGH */
          case TULIP_PROBE_PHYRESET: {
              u_int32_t status;
              u_int32_t data = tulip_mii_readreg(sc, phyaddr, PHYREG_CONTROL);
              if (data & PHYCTL_RESET) {
                  if (sc->tulip_probe_timeout > 0) {
                      tulip_timeout(sc);
                      return;
                  }
                  printf("%s(phy%d): error: reset of PHY never completed!\n",
                             ifp->if_xname, phyaddr);
                  sc->tulip_flags &= ~TULIP_TXPROBE_ACTIVE;
                  sc->tulip_probe_state = TULIP_PROBE_FAILED;
                  sc->tulip_ifp->if_flags &= ~IFF_UP;
                  sc->tulip_ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
                  return;
              }
              status = tulip_mii_readreg(sc, phyaddr, PHYREG_STATUS);
              if ((status & PHYSTS_CAN_AUTONEG) == 0) {
  #if defined(TULIP_DEBUG)
                  loudprintf("%s(phy%d): autonegotiation disabled\n",
                             ifp->if_xname, phyaddr);
  #endif
                  sc->tulip_flags &= ~TULIP_DIDNWAY;
                  sc->tulip_probe_state = TULIP_PROBE_MEDIATEST;
                  return;
              }
              if (tulip_mii_readreg(sc, phyaddr, PHYREG_AUTONEG_ADVERTISEMENT) != ((status >> 6) | 0x01))
                  tulip_mii_writereg(sc, phyaddr, PHYREG_AUTONEG_ADVERTISEMENT, (status >> 6) | 0x01);
              tulip_mii_writereg(sc, phyaddr, PHYREG_CONTROL, data|PHYCTL_AUTONEG_RESTART|PHYCTL_AUTONEG_ENABLE);
              data = tulip_mii_readreg(sc, phyaddr, PHYREG_CONTROL);
  #if defined(TULIP_DEBUG)
              if ((data & PHYCTL_AUTONEG_ENABLE) == 0)
                  loudprintf("%s(phy%d): oops: enable autonegotiation failed: 0x%04x\n",
                             ifp->if_xname, phyaddr, data);
              else
                  loudprintf("%s(phy%d): autonegotiation restarted: 0x%04x\n",
                             ifp->if_xname, phyaddr, data);
              sc->tulip_dbg.dbg_nway_starts++;
  #endif
              sc->tulip_probe_state = TULIP_PROBE_PHYAUTONEG;
              sc->tulip_probe_timeout = 3000;
          }
          /* FALLTHROUGH */
          case TULIP_PROBE_PHYAUTONEG: {
              u_int32_t status = tulip_mii_readreg(sc, phyaddr, PHYREG_STATUS);
              u_int32_t data;
              if ((status & PHYSTS_AUTONEG_DONE) == 0) {
                  if (sc->tulip_probe_timeout > 0) {
                      tulip_timeout(sc);
                      return;
                  }
  #if defined(TULIP_DEBUG)
                  loudprintf("%s(phy%d): autonegotiation timeout: sts=0x%04x, ctl=0x%04x\n",
                             ifp->if_xname, phyaddr, status,
                             tulip_mii_readreg(sc, phyaddr, PHYREG_CONTROL));
  #endif
                  sc->tulip_flags &= ~TULIP_DIDNWAY;
                  sc->tulip_probe_state = TULIP_PROBE_MEDIATEST;
                  return;
              }
              data = tulip_mii_readreg(sc, phyaddr, PHYREG_AUTONEG_ABILITIES);
  #if defined(TULIP_DEBUG)
              loudprintf("%s(phy%d): autonegotiation complete: 0x%04x\n",
                         ifp->if_xname, phyaddr, data);
  #endif
              data = (data << 6) & status;
              if (!tulip_mii_map_abilities(sc, data))
                  sc->tulip_flags &= ~TULIP_DIDNWAY;
              return;
          }
          default: {
  #if defined(DIAGNOSTIC)
              panic("tulip_media_poll: botch at line %d\n", __LINE__);
  #endif
              break;
          }
      }
  #if defined(TULIP_DEBUG)
      loudprintf("%s(phy%d): autonegotiation failure: state = %d\n",
                 ifp->if_xname, phyaddr, sc->tulip_probe_state);
              sc->tulip_dbg.dbg_nway_failures++;
  #endif
  }
  
  static void
  tulip_2114x_media_preset(tulip_softc_t * const sc)
  {
      const tulip_media_info_t *mi = NULL;
      tulip_media_t media = sc->tulip_media;
  
      TULIP_LOCK_ASSERT(sc);
      if (sc->tulip_probe_state == TULIP_PROBE_INACTIVE)
          media = sc->tulip_media;
      else
          media = sc->tulip_probe_media;
      
      sc->tulip_cmdmode &= ~TULIP_CMD_PORTSELECT;
      sc->tulip_flags &= ~TULIP_SQETEST;
      if (media != TULIP_MEDIA_UNKNOWN && media != TULIP_MEDIA_MAX) {
  #if defined(TULIP_DEBUG)
          if (media < TULIP_MEDIA_MAX && sc->tulip_mediums[media] != NULL) {
  #endif
              mi = sc->tulip_mediums[media];
              if (mi->mi_type == TULIP_MEDIAINFO_MII) {
                  sc->tulip_cmdmode |= TULIP_CMD_PORTSELECT;
              } else if (mi->mi_type == TULIP_MEDIAINFO_GPR
                         || mi->mi_type == TULIP_MEDIAINFO_SYM) {
                  sc->tulip_cmdmode &= ~TULIP_GPR_CMDBITS;
                  sc->tulip_cmdmode |= mi->mi_cmdmode;
              } else if (mi->mi_type == TULIP_MEDIAINFO_SIA) {
                  TULIP_CSR_WRITE(sc, csr_sia_connectivity, TULIP_SIACONN_RESET);
              }
  #if defined(TULIP_DEBUG)
          } else {
              device_printf(sc->tulip_dev, "preset: bad media %d!\n", media);
          }
  #endif
      }
      switch (media) {
          case TULIP_MEDIA_BNC:
          case TULIP_MEDIA_AUI:
          case TULIP_MEDIA_10BASET: {
              sc->tulip_cmdmode &= ~TULIP_CMD_FULLDUPLEX;
              sc->tulip_cmdmode |= TULIP_CMD_TXTHRSHLDCTL;
              sc->tulip_ifp->if_baudrate = 10000000;
              sc->tulip_flags |= TULIP_SQETEST;
              break;
          }
          case TULIP_MEDIA_10BASET_FD: {
              sc->tulip_cmdmode |= TULIP_CMD_FULLDUPLEX|TULIP_CMD_TXTHRSHLDCTL;
              sc->tulip_ifp->if_baudrate = 10000000;
              break;
          }
          case TULIP_MEDIA_100BASEFX:
          case TULIP_MEDIA_100BASET4:
          case TULIP_MEDIA_100BASETX: {
              sc->tulip_cmdmode &= ~(TULIP_CMD_FULLDUPLEX|TULIP_CMD_TXTHRSHLDCTL);
              sc->tulip_cmdmode |= TULIP_CMD_PORTSELECT;
              sc->tulip_ifp->if_baudrate = 100000000;
              break;
          }
          case TULIP_MEDIA_100BASEFX_FD:
          case TULIP_MEDIA_100BASETX_FD: {
              sc->tulip_cmdmode |= TULIP_CMD_FULLDUPLEX|TULIP_CMD_PORTSELECT;
              sc->tulip_cmdmode &= ~TULIP_CMD_TXTHRSHLDCTL;
              sc->tulip_ifp->if_baudrate = 100000000;
              break;
          }
          default: {
              break;
          }
      }
      TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode);
  }
  
  /*
   ********************************************************************
   *  Start of 21140/21140A support which does not use the MII interface 
   */
  
  static void
  tulip_null_media_poll(tulip_softc_t * const sc, tulip_mediapoll_event_t event)
  {
  #if defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_events[event]++;
  #endif
  #if defined(DIAGNOSTIC)
      device_printf(sc->tulip_dev, "botch(media_poll) at line %d\n", __LINE__);
  #endif
  }
  
  __inline static void
  tulip_21140_mediainit(tulip_softc_t * const sc, tulip_media_info_t * const mip,
      tulip_media_t const media, unsigned gpdata, unsigned cmdmode)
  {
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_mediums[media] = mip;
      mip->mi_type = TULIP_MEDIAINFO_GPR;
      mip->mi_cmdmode = cmdmode;
      mip->mi_gpdata = gpdata;
  }
  
  static void
  tulip_21140_evalboard_media_probe(tulip_softc_t * const sc)
  {
      tulip_media_info_t *mip = sc->tulip_mediainfo;
  
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_gpinit = TULIP_GP_EB_PINS;
      sc->tulip_gpdata = TULIP_GP_EB_INIT;
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_EB_PINS);
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_EB_INIT);
      TULIP_CSR_WRITE(sc, csr_command,
          TULIP_CSR_READ(sc, csr_command) | TULIP_CMD_PORTSELECT |
          TULIP_CMD_PCSFUNCTION | TULIP_CMD_SCRAMBLER | TULIP_CMD_MUSTBEONE);
      TULIP_CSR_WRITE(sc, csr_command,
          TULIP_CSR_READ(sc, csr_command) & ~TULIP_CMD_TXTHRSHLDCTL);
      DELAY(1000000);
      if ((TULIP_CSR_READ(sc, csr_gp) & TULIP_GP_EB_OK100) != 0) {
          sc->tulip_media = TULIP_MEDIA_10BASET;
      } else {
          sc->tulip_media = TULIP_MEDIA_100BASETX;
      }
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET,
                            TULIP_GP_EB_INIT,
                            TULIP_CMD_TXTHRSHLDCTL);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET_FD,
                            TULIP_GP_EB_INIT,
                            TULIP_CMD_TXTHRSHLDCTL|TULIP_CMD_FULLDUPLEX);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX,
                            TULIP_GP_EB_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX_FD,
                            TULIP_GP_EB_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER|TULIP_CMD_FULLDUPLEX);
  }
  
  static const tulip_boardsw_t tulip_21140_eb_boardsw = {
      TULIP_21140_DEC_EB,
      tulip_21140_evalboard_media_probe,
      tulip_media_select,
      tulip_null_media_poll,
      tulip_2114x_media_preset,
  };
  
  static void
  tulip_21140_accton_media_probe(tulip_softc_t * const sc)
  {
      tulip_media_info_t *mip = sc->tulip_mediainfo;
      unsigned gpdata;
  
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_gpinit = TULIP_GP_EB_PINS;
      sc->tulip_gpdata = TULIP_GP_EB_INIT;
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_EB_PINS);
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_EB_INIT);
      TULIP_CSR_WRITE(sc, csr_command,
          TULIP_CSR_READ(sc, csr_command) | TULIP_CMD_PORTSELECT |
          TULIP_CMD_PCSFUNCTION | TULIP_CMD_SCRAMBLER | TULIP_CMD_MUSTBEONE);
      TULIP_CSR_WRITE(sc, csr_command,
          TULIP_CSR_READ(sc, csr_command) & ~TULIP_CMD_TXTHRSHLDCTL);
      DELAY(1000000);
      gpdata = TULIP_CSR_READ(sc, csr_gp);
      if ((gpdata & TULIP_GP_EN1207_UTP_INIT) == 0) {
          sc->tulip_media = TULIP_MEDIA_10BASET;
      } else {
          if ((gpdata & TULIP_GP_EN1207_BNC_INIT) == 0) {
                  sc->tulip_media = TULIP_MEDIA_BNC;
          } else {
                  sc->tulip_media = TULIP_MEDIA_100BASETX;
          }
      }
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_BNC,
                            TULIP_GP_EN1207_BNC_INIT,
                            TULIP_CMD_TXTHRSHLDCTL);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET,
                            TULIP_GP_EN1207_UTP_INIT,
                            TULIP_CMD_TXTHRSHLDCTL);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET_FD,
                            TULIP_GP_EN1207_UTP_INIT,
                            TULIP_CMD_TXTHRSHLDCTL|TULIP_CMD_FULLDUPLEX);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX,
                            TULIP_GP_EN1207_100_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX_FD,
                            TULIP_GP_EN1207_100_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER|TULIP_CMD_FULLDUPLEX);
  }
  
  static const tulip_boardsw_t tulip_21140_accton_boardsw = {
      TULIP_21140_EN1207,
      tulip_21140_accton_media_probe,
      tulip_media_select,
      tulip_null_media_poll,
      tulip_2114x_media_preset,
  };
  
  static void
  tulip_21140_smc9332_media_probe(tulip_softc_t * const sc)
  {
      tulip_media_info_t *mip = sc->tulip_mediainfo;
      int idx, cnt = 0;
  
      TULIP_LOCK_ASSERT(sc);
      TULIP_CSR_WRITE(sc, csr_command, TULIP_CMD_PORTSELECT|TULIP_CMD_MUSTBEONE);
      TULIP_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
      DELAY(10);  /* Wait 10 microseconds (actually 50 PCI cycles but at 
                     33MHz that comes to two microseconds but wait a
                     bit longer anyways) */
      TULIP_CSR_WRITE(sc, csr_command, TULIP_CMD_PORTSELECT |
          TULIP_CMD_PCSFUNCTION | TULIP_CMD_SCRAMBLER | TULIP_CMD_MUSTBEONE);
      sc->tulip_gpinit = TULIP_GP_SMC_9332_PINS;
      sc->tulip_gpdata = TULIP_GP_SMC_9332_INIT;
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_SMC_9332_PINS|TULIP_GP_PINSET);
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_SMC_9332_INIT);
      DELAY(200000);
      for (idx = 1000; idx > 0; idx--) {
          u_int32_t csr = TULIP_CSR_READ(sc, csr_gp);
          if ((csr & (TULIP_GP_SMC_9332_OK10|TULIP_GP_SMC_9332_OK100)) == (TULIP_GP_SMC_9332_OK10|TULIP_GP_SMC_9332_OK100)) {
              if (++cnt > 100)
                  break;
          } else if ((csr & TULIP_GP_SMC_9332_OK10) == 0) {
              break;
          } else {
              cnt = 0;
          }
          DELAY(1000);
      }
      sc->tulip_media = cnt > 100 ? TULIP_MEDIA_100BASETX : TULIP_MEDIA_10BASET;
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX,
                            TULIP_GP_SMC_9332_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX_FD,
                            TULIP_GP_SMC_9332_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER|TULIP_CMD_FULLDUPLEX);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET,
                            TULIP_GP_SMC_9332_INIT,
                            TULIP_CMD_TXTHRSHLDCTL);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET_FD,
                            TULIP_GP_SMC_9332_INIT,
                            TULIP_CMD_TXTHRSHLDCTL|TULIP_CMD_FULLDUPLEX);
  }
   
  static const tulip_boardsw_t tulip_21140_smc9332_boardsw = {
      TULIP_21140_SMC_9332,
      tulip_21140_smc9332_media_probe,
      tulip_media_select,
      tulip_null_media_poll,
      tulip_2114x_media_preset,
  };
  
  static void
  tulip_21140_cogent_em100_media_probe(tulip_softc_t * const sc)
  {
      tulip_media_info_t *mip = sc->tulip_mediainfo;
      u_int32_t cmdmode = TULIP_CSR_READ(sc, csr_command);
  
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_gpinit = TULIP_GP_EM100_PINS;
      sc->tulip_gpdata = TULIP_GP_EM100_INIT;
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_EM100_PINS);
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_EM100_INIT);
  
      cmdmode = TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION|TULIP_CMD_MUSTBEONE;
      cmdmode &= ~(TULIP_CMD_TXTHRSHLDCTL|TULIP_CMD_SCRAMBLER);
      if (sc->tulip_rombuf[32] == TULIP_COGENT_EM100FX_ID) {
          TULIP_CSR_WRITE(sc, csr_command, cmdmode);
          sc->tulip_media = TULIP_MEDIA_100BASEFX;
  
          tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASEFX,
                            TULIP_GP_EM100_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION);
          tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASEFX_FD,
                            TULIP_GP_EM100_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_FULLDUPLEX);
      } else {
          TULIP_CSR_WRITE(sc, csr_command, cmdmode|TULIP_CMD_SCRAMBLER);
          sc->tulip_media = TULIP_MEDIA_100BASETX;
          tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX,
                            TULIP_GP_EM100_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER);
          tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX_FD,
                            TULIP_GP_EM100_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER|TULIP_CMD_FULLDUPLEX);
      }
  }
  
  static const tulip_boardsw_t tulip_21140_cogent_em100_boardsw = {
      TULIP_21140_COGENT_EM100,
      tulip_21140_cogent_em100_media_probe,
      tulip_media_select,
      tulip_null_media_poll,
      tulip_2114x_media_preset
  };
  
  static void
  tulip_21140_znyx_zx34x_media_probe(tulip_softc_t * const sc)
  {
      tulip_media_info_t *mip = sc->tulip_mediainfo;
      int cnt10 = 0, cnt100 = 0, idx;
  
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_gpinit = TULIP_GP_ZX34X_PINS;
      sc->tulip_gpdata = TULIP_GP_ZX34X_INIT;
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_ZX34X_PINS);
      TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_ZX34X_INIT);
      TULIP_CSR_WRITE(sc, csr_command,
          TULIP_CSR_READ(sc, csr_command) | TULIP_CMD_PORTSELECT |
          TULIP_CMD_PCSFUNCTION | TULIP_CMD_SCRAMBLER | TULIP_CMD_MUSTBEONE);
      TULIP_CSR_WRITE(sc, csr_command,
          TULIP_CSR_READ(sc, csr_command) & ~TULIP_CMD_TXTHRSHLDCTL);
  
      DELAY(200000);
      for (idx = 1000; idx > 0; idx--) {
          u_int32_t csr = TULIP_CSR_READ(sc, csr_gp);
          if ((csr & (TULIP_GP_ZX34X_LNKFAIL|TULIP_GP_ZX34X_SYMDET|TULIP_GP_ZX34X_SIGDET)) == (TULIP_GP_ZX34X_LNKFAIL|TULIP_GP_ZX34X_SYMDET|TULIP_GP_ZX34X_SIGDET)) {
              if (++cnt100 > 100)
                  break;
          } else if ((csr & TULIP_GP_ZX34X_LNKFAIL) == 0) {
              if (++cnt10 > 100)
                  break;
          } else {
              cnt10 = 0;
              cnt100 = 0;
          }
          DELAY(1000);
      }
      sc->tulip_media = cnt100 > 100 ? TULIP_MEDIA_100BASETX : TULIP_MEDIA_10BASET;
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET,
                            TULIP_GP_ZX34X_INIT,
                            TULIP_CMD_TXTHRSHLDCTL);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_10BASET_FD,
                            TULIP_GP_ZX34X_INIT,
                            TULIP_CMD_TXTHRSHLDCTL|TULIP_CMD_FULLDUPLEX);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX,
                            TULIP_GP_ZX34X_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER);
      tulip_21140_mediainit(sc, mip++, TULIP_MEDIA_100BASETX_FD,
                            TULIP_GP_ZX34X_INIT,
                            TULIP_CMD_PORTSELECT|TULIP_CMD_PCSFUNCTION
                                |TULIP_CMD_SCRAMBLER|TULIP_CMD_FULLDUPLEX);
  }
  
  static const tulip_boardsw_t tulip_21140_znyx_zx34x_boardsw = {
      TULIP_21140_ZNYX_ZX34X,
      tulip_21140_znyx_zx34x_media_probe,
      tulip_media_select,
      tulip_null_media_poll,
      tulip_2114x_media_preset,
  };
  
  static void
  tulip_2114x_media_probe(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_cmdmode |= TULIP_CMD_MUSTBEONE
          |TULIP_CMD_BACKOFFCTR|TULIP_CMD_THRSHLD72;
  }
  
  static const tulip_boardsw_t tulip_2114x_isv_boardsw = {
      TULIP_21140_ISV,
      tulip_2114x_media_probe,
      tulip_media_select,
      tulip_media_poll,
      tulip_2114x_media_preset,
  };
  
  /*
   * ******** END of chip-specific handlers. ***********
   */
  
  /*
   * Code the read the SROM and MII bit streams (I2C)
   */
  #define EMIT    do { TULIP_CSR_WRITE(sc, csr_srom_mii, csr); DELAY(1); } while (0)
  
  static void
  tulip_srom_idle(tulip_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
  tulip_srom_read(tulip_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;
  
      tulip_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 low; data not valid */
              if (thisbit != lastbit) {
                  csr ^= SROMDOUT; EMIT;  /* clock low; invert data */
              } else {
                  EMIT;
              }
              csr ^= SROMCLKON; EMIT;     /* clock high; data valid */
              lastbit = thisbit;
          }
          csr ^= SROMCLKOFF; EMIT;
  
          for (data = 0, bits = 0; bits < 16; bits++) {
              data <<= 1;
              csr ^= SROMCLKON; EMIT;     /* clock high; data valid */ 
              data |= TULIP_CSR_READ(sc, csr_srom_mii) & SROMDIN ? 1 : 0;
              csr ^= SROMCLKOFF; EMIT;    /* clock low; data not valid */
          }
          sc->tulip_rombuf[idx*2] = data & 0xFF;
          sc->tulip_rombuf[idx*2+1] = data >> 8;
          csr  = SROMSEL | SROMRD; EMIT;
          csr  = 0; EMIT;
      }
      tulip_srom_idle(sc);
  }
  
  #define MII_EMIT    do { TULIP_CSR_WRITE(sc, csr_srom_mii, csr); DELAY(1); } while (0)
  
  static void
  tulip_mii_writebits(tulip_softc_t * const sc, unsigned data, unsigned bits)
  {
      unsigned msb = 1 << (bits - 1);
      unsigned csr = TULIP_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
      unsigned lastbit = (csr & MII_DOUT) ? msb : 0;
  
      TULIP_LOCK_ASSERT(sc);
      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
  tulip_mii_turnaround(tulip_softc_t * const sc, unsigned cmd)
  {
      unsigned csr = TULIP_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
  
      TULIP_LOCK_ASSERT(sc);
      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 unsigned
  tulip_mii_readbits(tulip_softc_t * const sc)
  {
      unsigned data;
      unsigned csr = TULIP_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
      int idx;
  
      TULIP_LOCK_ASSERT(sc);
      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 (TULIP_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;
  }
  
  static unsigned
  tulip_mii_readreg(tulip_softc_t * const sc, unsigned devaddr, unsigned regno)
  {
      unsigned csr = TULIP_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
      unsigned data;
  
      TULIP_LOCK_ASSERT(sc);
      csr &= ~(MII_RD|MII_CLK); MII_EMIT;
      tulip_mii_writebits(sc, MII_PREAMBLE, 32);
      tulip_mii_writebits(sc, MII_RDCMD, 8);
      tulip_mii_writebits(sc, devaddr, 5);
      tulip_mii_writebits(sc, regno, 5);
      tulip_mii_turnaround(sc, MII_RDCMD);
  
      data = tulip_mii_readbits(sc);
  #if defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_phyregs[regno][0] = data;
      sc->tulip_dbg.dbg_phyregs[regno][1]++;
  #endif
      return data;
  }
  
  static void
  tulip_mii_writereg(tulip_softc_t * const sc, unsigned devaddr, unsigned regno,
      unsigned data)
  {
      unsigned csr = TULIP_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
  
      TULIP_LOCK_ASSERT(sc);
      csr &= ~(MII_RD|MII_CLK); MII_EMIT;
      tulip_mii_writebits(sc, MII_PREAMBLE, 32);
      tulip_mii_writebits(sc, MII_WRCMD, 8);
      tulip_mii_writebits(sc, devaddr, 5);
      tulip_mii_writebits(sc, regno, 5);
      tulip_mii_turnaround(sc, MII_WRCMD);
      tulip_mii_writebits(sc, data, 16);
  #if defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_phyregs[regno][2] = data;
      sc->tulip_dbg.dbg_phyregs[regno][3]++;
  #endif
  }
  
  #define tulip_mchash(mca)       (ether_crc32_le(mca, 6) & 0x1FF)
  #define tulip_srom_crcok(databuf)       ( \
      ((ether_crc32_le(databuf, 126) & 0xFFFFU) ^ 0xFFFFU) == \
       ((databuf)[126] | ((databuf)[127] << 8)))
  
  static void
  tulip_identify_dec_nic(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      strcpy(sc->tulip_boardid, "DEC ");
  #define D0      4
      if (sc->tulip_chipid <= TULIP_21040)
          return;
      if (bcmp(sc->tulip_rombuf + 29, "DE500", 5) == 0
          || bcmp(sc->tulip_rombuf + 29, "DE450", 5) == 0) {
          bcopy(sc->tulip_rombuf + 29, &sc->tulip_boardid[D0], 8);
          sc->tulip_boardid[D0+8] = ' ';
      }
  #undef D0
  }
  
  static void
  tulip_identify_znyx_nic(tulip_softc_t * const sc)
  {
      unsigned id = 0;
  
      TULIP_LOCK_ASSERT(sc);
      strcpy(sc->tulip_boardid, "ZNYX ZX3XX ");
      if (sc->tulip_chipid == TULIP_21140 || sc->tulip_chipid == TULIP_21140A) {
          unsigned znyx_ptr;
          sc->tulip_boardid[8] = '4';
          znyx_ptr = sc->tulip_rombuf[124] + 256 * sc->tulip_rombuf[125];
          if (znyx_ptr < 26 || znyx_ptr > 116) {
              sc->tulip_boardsw = &tulip_21140_znyx_zx34x_boardsw;
              return;
          }
          /* ZX344 = 0010 .. 0013FF
           */
          if (sc->tulip_rombuf[znyx_ptr] == 0x4A
                  && sc->tulip_rombuf[znyx_ptr + 1] == 0x52
                  && sc->tulip_rombuf[znyx_ptr + 2] == 0x01) {
              id = sc->tulip_rombuf[znyx_ptr + 5] + 256 * sc->tulip_rombuf[znyx_ptr + 4];
              if ((id >> 8) == (TULIP_ZNYX_ID_ZX342 >> 8)) {
                  sc->tulip_boardid[9] = '2';
                  if (id == TULIP_ZNYX_ID_ZX342B) {
                      sc->tulip_boardid[10] = 'B';
                      sc->tulip_boardid[11] = ' ';
                  }
                  sc->tulip_boardsw = &tulip_21140_znyx_zx34x_boardsw;
              } else if (id == TULIP_ZNYX_ID_ZX344) {
                  sc->tulip_boardid[10] = '4';
                  sc->tulip_boardsw = &tulip_21140_znyx_zx34x_boardsw;
              } else if (id == TULIP_ZNYX_ID_ZX345) {
                  sc->tulip_boardid[9] = (sc->tulip_rombuf[19] > 1) ? '8' : '5';
              } else if (id == TULIP_ZNYX_ID_ZX346) {
                  sc->tulip_boardid[9] = '6';
              } else if (id == TULIP_ZNYX_ID_ZX351) {
                  sc->tulip_boardid[8] = '5';
                  sc->tulip_boardid[9] = '1';
              }
          }
          if (id == 0) {
              /*
               * Assume it's a ZX342...
               */
              sc->tulip_boardsw = &tulip_21140_znyx_zx34x_boardsw;
          }
          return;
      }
      sc->tulip_boardid[8] = '1';
      if (sc->tulip_chipid == TULIP_21041) {
          sc->tulip_boardid[10] = '1';
          return;
      }
      if (sc->tulip_rombuf[32] == 0x4A && sc->tulip_rombuf[33] == 0x52) {
          id = sc->tulip_rombuf[37] + 256 * sc->tulip_rombuf[36];
          if (id == TULIP_ZNYX_ID_ZX312T) {
              sc->tulip_boardid[9] = '2';
              sc->tulip_boardid[10] = 'T';
              sc->tulip_boardid[11] = ' ';
              sc->tulip_boardsw = &tulip_21040_10baset_only_boardsw;
          } else if (id == TULIP_ZNYX_ID_ZX314_INTA) {
              sc->tulip_boardid[9] = '4';
              sc->tulip_boardsw = &tulip_21040_10baset_only_boardsw;
              sc->tulip_features |= TULIP_HAVE_SHAREDINTR|TULIP_HAVE_BASEROM;
          } else if (id == TULIP_ZNYX_ID_ZX314) {
              sc->tulip_boardid[9] = '4';
              sc->tulip_boardsw = &tulip_21040_10baset_only_boardsw;
              sc->tulip_features |= TULIP_HAVE_BASEROM;
          } else if (id == TULIP_ZNYX_ID_ZX315_INTA) {
              sc->tulip_boardid[9] = '5';
              sc->tulip_features |= TULIP_HAVE_SHAREDINTR|TULIP_HAVE_BASEROM;
          } else if (id == TULIP_ZNYX_ID_ZX315) {
              sc->tulip_boardid[9] = '5';
              sc->tulip_features |= TULIP_HAVE_BASEROM;
          } else {
              id = 0;
          }
      }               
      if (id == 0) {
          if ((sc->tulip_enaddr[3] & ~3) == 0xF0 && (sc->tulip_enaddr[5] & 2) == 0) {
              sc->tulip_boardid[9] = '4';
              sc->tulip_boardsw = &tulip_21040_10baset_only_boardsw;
              sc->tulip_features |= TULIP_HAVE_SHAREDINTR|TULIP_HAVE_BASEROM;
          } else if ((sc->tulip_enaddr[3] & ~3) == 0xF4 && (sc->tulip_enaddr[5] & 1) == 0) {
              sc->tulip_boardid[9] = '5';
              sc->tulip_boardsw = &tulip_21040_boardsw;
              sc->tulip_features |= TULIP_HAVE_SHAREDINTR|TULIP_HAVE_BASEROM;
          } else if ((sc->tulip_enaddr[3] & ~3) == 0xEC) {
              sc->tulip_boardid[9] = '2';
              sc->tulip_boardsw = &tulip_21040_boardsw;
          }
      }
  }
  
  static void
  tulip_identify_smc_nic(tulip_softc_t * const sc)
  {
      u_int32_t id1, id2, ei;
      int auibnc = 0, utp = 0;
      char *cp;
  
      TULIP_LOCK_ASSERT(sc);
      strcpy(sc->tulip_boardid, "SMC ");
      if (sc->tulip_chipid == TULIP_21041)
          return;
      if (sc->tulip_chipid != TULIP_21040) {
          if (sc->tulip_boardsw != &tulip_2114x_isv_boardsw) {
              strcpy(&sc->tulip_boardid[4], "9332DST ");
              sc->tulip_boardsw = &tulip_21140_smc9332_boardsw;
          } else if (sc->tulip_features & (TULIP_HAVE_BASEROM|TULIP_HAVE_SLAVEDROM)) {
              strcpy(&sc->tulip_boardid[4], "9334BDT ");
          } else {
              strcpy(&sc->tulip_boardid[4], "9332BDT ");
          }
          return;
      }
      id1 = sc->tulip_rombuf[0x60] | (sc->tulip_rombuf[0x61] << 8);
      id2 = sc->tulip_rombuf[0x62] | (sc->tulip_rombuf[0x63] << 8);
      ei  = sc->tulip_rombuf[0x66] | (sc->tulip_rombuf[0x67] << 8);
  
      strcpy(&sc->tulip_boardid[4], "8432");
      cp = &sc->tulip_boardid[8];
      if ((id1 & 1) == 0)
          *cp++ = 'B', auibnc = 1;
      if ((id1 & 0xFF) > 0x32)
          *cp++ = 'T', utp = 1;
      if ((id1 & 0x4000) == 0)
          *cp++ = 'A', auibnc = 1;
      if (id2 == 0x15) {
          sc->tulip_boardid[7] = '4';
          *cp++ = '-';
          *cp++ = 'C';
          *cp++ = 'H';
          *cp++ = (ei ? '2' : '1');
      }
      *cp++ = ' ';
      *cp = '\0';
      if (utp && !auibnc)
          sc->tulip_boardsw = &tulip_21040_10baset_only_boardsw;
      else if (!utp && auibnc)
          sc->tulip_boardsw = &tulip_21040_auibnc_only_boardsw;
  }
  
  static void
  tulip_identify_cogent_nic(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      strcpy(sc->tulip_boardid, "Cogent ");
      if (sc->tulip_chipid == TULIP_21140 || sc->tulip_chipid == TULIP_21140A) {
          if (sc->tulip_rombuf[32] == TULIP_COGENT_EM100TX_ID) {
              strcat(sc->tulip_boardid, "EM100TX ");
              sc->tulip_boardsw = &tulip_21140_cogent_em100_boardsw;
  #if defined(TULIP_COGENT_EM110TX_ID)
          } else if (sc->tulip_rombuf[32] == TULIP_COGENT_EM110TX_ID) {
              strcat(sc->tulip_boardid, "EM110TX ");
              sc->tulip_boardsw = &tulip_21140_cogent_em100_boardsw;
  #endif
          } else if (sc->tulip_rombuf[32] == TULIP_COGENT_EM100FX_ID) {
              strcat(sc->tulip_boardid, "EM100FX ");
              sc->tulip_boardsw = &tulip_21140_cogent_em100_boardsw;
          }
          /*
           * Magic number (0x24001109U) is the SubVendor (0x2400) and
           * SubDevId (0x1109) for the ANA6944TX (EM440TX).
           */
          if (*(u_int32_t *) sc->tulip_rombuf == 0x24001109U
                  && (sc->tulip_features & TULIP_HAVE_BASEROM)) {
              /*
               * Cogent (Adaptec) is still mapping all INTs to INTA of
               * first 21140.  Dumb!  Dumb!
               */
              strcat(sc->tulip_boardid, "EM440TX ");
              sc->tulip_features |= TULIP_HAVE_SHAREDINTR;
          }
      } else if (sc->tulip_chipid == TULIP_21040) {
          sc->tulip_features |= TULIP_HAVE_SHAREDINTR|TULIP_HAVE_BASEROM;
      }
  }
  
  static void
  tulip_identify_accton_nic(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      strcpy(sc->tulip_boardid, "ACCTON ");
      switch (sc->tulip_chipid) {
          case TULIP_21140A:
              strcat(sc->tulip_boardid, "EN1207 ");
              if (sc->tulip_boardsw != &tulip_2114x_isv_boardsw)
                  sc->tulip_boardsw = &tulip_21140_accton_boardsw;
              break;
          case TULIP_21140:
              strcat(sc->tulip_boardid, "EN1207TX ");
              if (sc->tulip_boardsw != &tulip_2114x_isv_boardsw)
                  sc->tulip_boardsw = &tulip_21140_eb_boardsw;
              break;
          case TULIP_21040:
              strcat(sc->tulip_boardid, "EN1203 ");
              sc->tulip_boardsw = &tulip_21040_boardsw;
              break;
          case TULIP_21041:
              strcat(sc->tulip_boardid, "EN1203 ");
              sc->tulip_boardsw = &tulip_21041_boardsw;
              break;
          default:
              sc->tulip_boardsw = &tulip_2114x_isv_boardsw;
              break;
      }
  }
  
  static void
  tulip_identify_asante_nic(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      strcpy(sc->tulip_boardid, "Asante ");
      if ((sc->tulip_chipid == TULIP_21140 || sc->tulip_chipid == TULIP_21140A)
              && sc->tulip_boardsw != &tulip_2114x_isv_boardsw) {
          tulip_media_info_t *mi = sc->tulip_mediainfo;
          int idx;
          /*
           * The Asante Fast Ethernet doesn't always ship with a valid
           * new format SROM.  So if isn't in the new format, we cheat
           * set it up as if we had.
           */
  
          sc->tulip_gpinit = TULIP_GP_ASANTE_PINS;
          sc->tulip_gpdata = 0;
  
          TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_ASANTE_PINS|TULIP_GP_PINSET);
          TULIP_CSR_WRITE(sc, csr_gp, TULIP_GP_ASANTE_PHYRESET);
          DELAY(100);
          TULIP_CSR_WRITE(sc, csr_gp, 0);
  
          mi->mi_type = TULIP_MEDIAINFO_MII;
          mi->mi_gpr_length = 0;
          mi->mi_gpr_offset = 0;
          mi->mi_reset_length = 0;
          mi->mi_reset_offset = 0;
  
          mi->mi_phyaddr = TULIP_MII_NOPHY;
          for (idx = 20; idx > 0 && mi->mi_phyaddr == TULIP_MII_NOPHY; idx--) {
              DELAY(10000);
              mi->mi_phyaddr = tulip_mii_get_phyaddr(sc, 0);
          }
          if (mi->mi_phyaddr == TULIP_MII_NOPHY) {
              device_printf(sc->tulip_dev, "can't find phy 0\n");
              return;
          }
  
          sc->tulip_features |= TULIP_HAVE_MII;
          mi->mi_capabilities  = PHYSTS_10BASET|PHYSTS_10BASET_FD|PHYSTS_100BASETX|PHYSTS_100BASETX_FD;
          mi->mi_advertisement = PHYSTS_10BASET|PHYSTS_10BASET_FD|PHYSTS_100BASETX|PHYSTS_100BASETX_FD;
          mi->mi_full_duplex   = PHYSTS_10BASET_FD|PHYSTS_100BASETX_FD;
          mi->mi_tx_threshold  = PHYSTS_10BASET|PHYSTS_10BASET_FD;
          TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASETX_FD);
          TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASETX);
          TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASET4);
          TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 10BASET_FD);
          TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 10BASET);
          mi->mi_phyid = (tulip_mii_readreg(sc, mi->mi_phyaddr, PHYREG_IDLOW) << 16) |
              tulip_mii_readreg(sc, mi->mi_phyaddr, PHYREG_IDHIGH);
  
          sc->tulip_boardsw = &tulip_2114x_isv_boardsw;
      }
  }
  
  static void
  tulip_identify_compex_nic(tulip_softc_t * const sc)
  {
      TULIP_LOCK_ASSERT(sc);
      strcpy(sc->tulip_boardid, "COMPEX ");
      if (sc->tulip_chipid == TULIP_21140A) {
          int root_unit;
          tulip_softc_t *root_sc = NULL;
  
          strcat(sc->tulip_boardid, "400TX/PCI ");
          /*
           * All 4 chips on these boards share an interrupt.  This code
           * copied from tulip_read_macaddr.
           */
          sc->tulip_features |= TULIP_HAVE_SHAREDINTR;
          for (root_unit = sc->tulip_unit - 1; root_unit >= 0; root_unit--) {
              root_sc = tulips[root_unit];
              if (root_sc == NULL
                  || !(root_sc->tulip_features & TULIP_HAVE_SLAVEDINTR))
                  break;
              root_sc = NULL;
          }
          if (root_sc != NULL
              && root_sc->tulip_chipid == sc->tulip_chipid
              && root_sc->tulip_pci_busno == sc->tulip_pci_busno) {
              sc->tulip_features |= TULIP_HAVE_SLAVEDINTR;
              sc->tulip_slaves = root_sc->tulip_slaves;
              root_sc->tulip_slaves = sc;
          } else if(sc->tulip_features & TULIP_HAVE_SLAVEDINTR) {
              printf("\nCannot find master device for %s interrupts",
                     sc->tulip_ifp->if_xname);
          }
      } else {
          strcat(sc->tulip_boardid, "unknown ");
      }
      /*      sc->tulip_boardsw = &tulip_21140_eb_boardsw; */
      return;
  }
  
  static int
  tulip_srom_decode(tulip_softc_t * const sc)
  {
      unsigned idx1, idx2, idx3;
  
      const tulip_srom_header_t *shp = (const tulip_srom_header_t *) &sc->tulip_rombuf[0];
      const tulip_srom_adapter_info_t *saip = (const tulip_srom_adapter_info_t *) (shp + 1);
      tulip_srom_media_t srom_media;
      tulip_media_info_t *mi = sc->tulip_mediainfo;
      const u_int8_t *dp;
      u_int32_t leaf_offset, blocks, data;
  
      TULIP_LOCK_ASSERT(sc);
      for (idx1 = 0; idx1 < shp->sh_adapter_count; idx1++, saip++) {
          if (shp->sh_adapter_count == 1)
              break;
          if (saip->sai_device == sc->tulip_pci_devno)
              break;
      }
      /*
       * Didn't find the right media block for this card.
       */
      if (idx1 == shp->sh_adapter_count)
          return 0;
  
      /*
       * Save the hardware address.
       */
      bcopy(shp->sh_ieee802_address, sc->tulip_enaddr, 6);
      /*
       * If this is a multiple port card, add the adapter index to the last
       * byte of the hardware address.  (if it isn't multiport, adding 0
       * won't hurt.
       */
      sc->tulip_enaddr[5] += idx1;
  
      leaf_offset = saip->sai_leaf_offset_lowbyte
          + saip->sai_leaf_offset_highbyte * 256;
      dp = sc->tulip_rombuf + leaf_offset;
          
      sc->tulip_conntype = (tulip_srom_connection_t) (dp[0] + dp[1] * 256); dp += 2;
  
      for (idx2 = 0;; idx2++) {
          if (tulip_srom_conninfo[idx2].sc_type == sc->tulip_conntype
                  || tulip_srom_conninfo[idx2].sc_type == TULIP_SROM_CONNTYPE_NOT_USED)
              break;
      }
      sc->tulip_connidx = idx2;
  
      if (sc->tulip_chipid == TULIP_21041) {
          blocks = *dp++;
          for (idx2 = 0; idx2 < blocks; idx2++) {
              tulip_media_t media;
              data = *dp++;
              srom_media = (tulip_srom_media_t) (data & 0x3F);
              for (idx3 = 0; tulip_srom_mediums[idx3].sm_type != TULIP_MEDIA_UNKNOWN; idx3++) {
                  if (tulip_srom_mediums[idx3].sm_srom_type == srom_media)
                      break;
              }
              media = tulip_srom_mediums[idx3].sm_type;
              if (media != TULIP_MEDIA_UNKNOWN) {
                  if (data & TULIP_SROM_21041_EXTENDED) {
                      mi->mi_type = TULIP_MEDIAINFO_SIA;
                      sc->tulip_mediums[media] = mi;
                      mi->mi_sia_connectivity = dp[0] + dp[1] * 256;
                      mi->mi_sia_tx_rx        = dp[2] + dp[3] * 256;
                      mi->mi_sia_general      = dp[4] + dp[5] * 256;
                      mi++;
                  } else {
                      switch (media) {
                          case TULIP_MEDIA_BNC: {
                              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, BNC);
                              mi++;
                              break;
                          }
                          case TULIP_MEDIA_AUI: {
                              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, AUI);
                              mi++;
                              break;
                          }
                          case TULIP_MEDIA_10BASET: {
                              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, 10BASET);
                              mi++;
                              break;
                          }
                          case TULIP_MEDIA_10BASET_FD: {
                              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, 10BASET_FD);
                              mi++;
                              break;
                          }
                          default: {
                              break;
                          }
                      }
                  }
              }
              if (data & TULIP_SROM_21041_EXTENDED)       
                  dp += 6;
          }
  #ifdef notdef
          if (blocks == 0) {
              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, BNC); mi++;
              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, AUI); mi++;
              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, 10BASET); mi++;
              TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21041, 10BASET_FD); mi++;
          }
  #endif
      } else {
          unsigned length, type;
          tulip_media_t gp_media = TULIP_MEDIA_UNKNOWN;
          if (sc->tulip_features & TULIP_HAVE_GPR)
              sc->tulip_gpinit = *dp++;
          blocks = *dp++;
          for (idx2 = 0; idx2 < blocks; idx2++) {
              const u_int8_t *ep;
              if ((*dp & 0x80) == 0) {
                  length = 4;
                  type = 0;
              } else {
                  length = (*dp++ & 0x7f) - 1;
                  type = *dp++ & 0x3f;
              }
              ep = dp + length;
              switch (type & 0x3f) {
                  case 0: {       /* 21140[A] GPR block */
                      tulip_media_t media;
                      srom_media = (tulip_srom_media_t)(dp[0] & 0x3f);
                      for (idx3 = 0; tulip_srom_mediums[idx3].sm_type != TULIP_MEDIA_UNKNOWN; idx3++) {
                          if (tulip_srom_mediums[idx3].sm_srom_type == srom_media)
                              break;
                      }
                      media = tulip_srom_mediums[idx3].sm_type;
                      if (media == TULIP_MEDIA_UNKNOWN)
                          break;
                      mi->mi_type = TULIP_MEDIAINFO_GPR;
                      sc->tulip_mediums[media] = mi;
                      mi->mi_gpdata = dp[1];
                      if (media > gp_media && !TULIP_IS_MEDIA_FD(media)) {
                          sc->tulip_gpdata = mi->mi_gpdata;
                          gp_media = media;
                      }
                      data = dp[2] + dp[3] * 256;
                      mi->mi_cmdmode = TULIP_SROM_2114X_CMDBITS(data);
                      if (data & TULIP_SROM_2114X_NOINDICATOR) {
                          mi->mi_actmask = 0;
                      } else {
  #if 0
                          mi->mi_default = (data & TULIP_SROM_2114X_DEFAULT) != 0;
  #endif
                          mi->mi_actmask = TULIP_SROM_2114X_BITPOS(data);
                          mi->mi_actdata = (data & TULIP_SROM_2114X_POLARITY) ? 0 : mi->mi_actmask;
                      }
                      mi++;
                      break;
                  }
                  case 1: {       /* 21140[A] MII block */
                      const unsigned phyno = *dp++;
                      mi->mi_type = TULIP_MEDIAINFO_MII;
                      mi->mi_gpr_length = *dp++;
                      mi->mi_gpr_offset = dp - sc->tulip_rombuf;
                      dp += mi->mi_gpr_length;
                      mi->mi_reset_length = *dp++;
                      mi->mi_reset_offset = dp - sc->tulip_rombuf;
                      dp += mi->mi_reset_length;
  
                      /*
                       * Before we probe for a PHY, use the GPR information
                       * to select it.  If we don't, it may be inaccessible.
                       */
                      TULIP_CSR_WRITE(sc, csr_gp, sc->tulip_gpinit|TULIP_GP_PINSET);
                      for (idx3 = 0; idx3 < mi->mi_reset_length; idx3++) {
                          DELAY(10);
                          TULIP_CSR_WRITE(sc, csr_gp, sc->tulip_rombuf[mi->mi_reset_offset + idx3]);
                      }
                      sc->tulip_phyaddr = mi->mi_phyaddr;
                      for (idx3 = 0; idx3 < mi->mi_gpr_length; idx3++) {
                          DELAY(10);
                          TULIP_CSR_WRITE(sc, csr_gp, sc->tulip_rombuf[mi->mi_gpr_offset + idx3]);
                      }
  
                      /*
                       * At least write something!
                       */
                      if (mi->mi_reset_length == 0 && mi->mi_gpr_length == 0)
                          TULIP_CSR_WRITE(sc, csr_gp, 0);
  
                      mi->mi_phyaddr = TULIP_MII_NOPHY;
                      for (idx3 = 20; idx3 > 0 && mi->mi_phyaddr == TULIP_MII_NOPHY; idx3--) {
                          DELAY(10000);
                          mi->mi_phyaddr = tulip_mii_get_phyaddr(sc, phyno);
                      }
                      if (mi->mi_phyaddr == TULIP_MII_NOPHY) {
  #if defined(TULIP_DEBUG)
                          device_printf(sc->tulip_dev, "can't find phy %d\n",
                              phyno);
  #endif
                          break;
                      }
                      sc->tulip_features |= TULIP_HAVE_MII;
                      mi->mi_capabilities  = dp[0] + dp[1] * 256; dp += 2;
                      mi->mi_advertisement = dp[0] + dp[1] * 256; dp += 2;
                      mi->mi_full_duplex   = dp[0] + dp[1] * 256; dp += 2;
                      mi->mi_tx_threshold  = dp[0] + dp[1] * 256; dp += 2;
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASETX_FD);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASETX);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASET4);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 10BASET_FD);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 10BASET);
                      mi->mi_phyid = (tulip_mii_readreg(sc, mi->mi_phyaddr, PHYREG_IDLOW) << 16) |
                          tulip_mii_readreg(sc, mi->mi_phyaddr, PHYREG_IDHIGH);
                      mi++;
                      break;
                  }
                  case 2: {       /* 2114[23] SIA block */
                      tulip_media_t media;
                      srom_media = (tulip_srom_media_t)(dp[0] & 0x3f);
                      for (idx3 = 0; tulip_srom_mediums[idx3].sm_type != TULIP_MEDIA_UNKNOWN; idx3++) {
                          if (tulip_srom_mediums[idx3].sm_srom_type == srom_media)
                              break;
                      }
                      media = tulip_srom_mediums[idx3].sm_type;
                      if (media == TULIP_MEDIA_UNKNOWN)
                          break;
                      mi->mi_type = TULIP_MEDIAINFO_SIA;
                      sc->tulip_mediums[media] = mi;
                      if (dp[0] & 0x40) {
                          mi->mi_sia_connectivity = dp[1] + dp[2] * 256;
                          mi->mi_sia_tx_rx        = dp[3] + dp[4] * 256;
                          mi->mi_sia_general      = dp[5] + dp[6] * 256;
                          dp += 6;
                      } else {
                          switch (media) {
                              case TULIP_MEDIA_BNC: {
                                  TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21142, BNC);
                                  break;
                              }
                              case TULIP_MEDIA_AUI: {
                                  TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21142, AUI);
                                  break;
                              }
                              case TULIP_MEDIA_10BASET: {
                                  TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21142, 10BASET);
                                  sc->tulip_intrmask |= TULIP_STS_LINKPASS|TULIP_STS_LINKFAIL;
                                  break;
                              }
                              case TULIP_MEDIA_10BASET_FD: {
                                  TULIP_MEDIAINFO_SIA_INIT(sc, mi, 21142, 10BASET_FD);
                                  sc->tulip_intrmask |= TULIP_STS_LINKPASS|TULIP_STS_LINKFAIL;
                                  break;
                              }
                              default: {
                                  goto bad_media;
                              }
                          }
                      }
                      mi->mi_sia_gp_control = (dp[1] + dp[2] * 256) << 16;
                      mi->mi_sia_gp_data    = (dp[3] + dp[4] * 256) << 16;
                      mi++;
                    bad_media:
                      break;
                  }
                  case 3: {       /* 2114[23] MII PHY block */
                      const unsigned phyno = *dp++;
                      const u_int8_t *dp0;
                      mi->mi_type = TULIP_MEDIAINFO_MII;
                      mi->mi_gpr_length = *dp++;
                      mi->mi_gpr_offset = dp - sc->tulip_rombuf;
                      dp += 2 * mi->mi_gpr_length;
                      mi->mi_reset_length = *dp++;
                      mi->mi_reset_offset = dp - sc->tulip_rombuf;
                      dp += 2 * mi->mi_reset_length;
  
                      dp0 = &sc->tulip_rombuf[mi->mi_reset_offset];
                      for (idx3 = 0; idx3 < mi->mi_reset_length; idx3++, dp0 += 2) {
                          DELAY(10);
                          TULIP_CSR_WRITE(sc, csr_sia_general, (dp0[0] + 256 * dp0[1]) << 16);
                      }
                      sc->tulip_phyaddr = mi->mi_phyaddr;
                      dp0 = &sc->tulip_rombuf[mi->mi_gpr_offset];
                      for (idx3 = 0; idx3 < mi->mi_gpr_length; idx3++, dp0 += 2) {
                          DELAY(10);
                          TULIP_CSR_WRITE(sc, csr_sia_general, (dp0[0] + 256 * dp0[1]) << 16);
                      }
  
                      if (mi->mi_reset_length == 0 && mi->mi_gpr_length == 0)
                          TULIP_CSR_WRITE(sc, csr_sia_general, 0);
  
                      mi->mi_phyaddr = TULIP_MII_NOPHY;
                      for (idx3 = 20; idx3 > 0 && mi->mi_phyaddr == TULIP_MII_NOPHY; idx3--) {
                          DELAY(10000);
                          mi->mi_phyaddr = tulip_mii_get_phyaddr(sc, phyno);
                      }
                      if (mi->mi_phyaddr == TULIP_MII_NOPHY) {
  #if defined(TULIP_DEBUG)
                          device_printf(sc->tulip_dev, "can't find phy %d\n",
                                 phyno);
  #endif
                          break;
                      }
                      sc->tulip_features |= TULIP_HAVE_MII;
                      mi->mi_capabilities  = dp[0] + dp[1] * 256; dp += 2;
                      mi->mi_advertisement = dp[0] + dp[1] * 256; dp += 2;
                      mi->mi_full_duplex   = dp[0] + dp[1] * 256; dp += 2;
                      mi->mi_tx_threshold  = dp[0] + dp[1] * 256; dp += 2;
                      mi->mi_mii_interrupt = dp[0] + dp[1] * 256; dp += 2;
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASETX_FD);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASETX);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 100BASET4);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 10BASET_FD);
                      TULIP_MEDIAINFO_ADD_CAPABILITY(sc, mi, 10BASET);
                      mi->mi_phyid = (tulip_mii_readreg(sc, mi->mi_phyaddr, PHYREG_IDLOW) << 16) |
                          tulip_mii_readreg(sc, mi->mi_phyaddr, PHYREG_IDHIGH);
                      mi++;
                      break;
                  }
                  case 4: {       /* 21143 SYM block */
                      tulip_media_t media;
                      srom_media = (tulip_srom_media_t) dp[0];
                      for (idx3 = 0; tulip_srom_mediums[idx3].sm_type != TULIP_MEDIA_UNKNOWN; idx3++) {
                          if (tulip_srom_mediums[idx3].sm_srom_type == srom_media)
                              break;
                      }
                      media = tulip_srom_mediums[idx3].sm_type;
                      if (media == TULIP_MEDIA_UNKNOWN)
                          break;
                      mi->mi_type = TULIP_MEDIAINFO_SYM;
                      sc->tulip_mediums[media] = mi;
                      mi->mi_gpcontrol = (dp[1] + dp[2] * 256) << 16;
                      mi->mi_gpdata    = (dp[3] + dp[4] * 256) << 16;
                      data = dp[5] + dp[6] * 256;
                      mi->mi_cmdmode = TULIP_SROM_2114X_CMDBITS(data);
                      if (data & TULIP_SROM_2114X_NOINDICATOR) {
                          mi->mi_actmask = 0;
                      } else {
                          mi->mi_default = (data & TULIP_SROM_2114X_DEFAULT) != 0;
                          mi->mi_actmask = TULIP_SROM_2114X_BITPOS(data);
                          mi->mi_actdata = (data & TULIP_SROM_2114X_POLARITY) ? 0 : mi->mi_actmask;
                      }
                      if (TULIP_IS_MEDIA_TP(media))
                          sc->tulip_intrmask |= TULIP_STS_LINKPASS|TULIP_STS_LINKFAIL;
                      mi++;
                      break;
                  }
  #if 0
                  case 5: {       /* 21143 Reset block */
                      mi->mi_type = TULIP_MEDIAINFO_RESET;
                      mi->mi_reset_length = *dp++;
                      mi->mi_reset_offset = dp - sc->tulip_rombuf;
                      dp += 2 * mi->mi_reset_length;
                      mi++;
                      break;
                  }
  #endif
                  default: {
                  }
              }
              dp = ep;
          }
      }
      return mi - sc->tulip_mediainfo;
  }
  
  static const struct {
      void (*vendor_identify_nic)(tulip_softc_t * const sc);
      unsigned char vendor_oui[3];
  } tulip_vendors[] = {
      { tulip_identify_dec_nic,           { 0x08, 0x00, 0x2B } },
      { tulip_identify_dec_nic,           { 0x00, 0x00, 0xF8 } },
      { tulip_identify_smc_nic,           { 0x00, 0x00, 0xC0 } },
      { tulip_identify_smc_nic,           { 0x00, 0xE0, 0x29 } },
      { tulip_identify_znyx_nic,          { 0x00, 0xC0, 0x95 } },
      { tulip_identify_cogent_nic,        { 0x00, 0x00, 0x92 } },
      { tulip_identify_asante_nic,        { 0x00, 0x00, 0x94 } },
      { tulip_identify_cogent_nic,        { 0x00, 0x00, 0xD1 } },
      { tulip_identify_accton_nic,        { 0x00, 0x00, 0xE8 } },
      { tulip_identify_compex_nic,        { 0x00, 0x80, 0x48 } },
      { NULL }
  };
  
  /*
   * This deals with the vagaries of the address roms and the
   * brain-deadness that various vendors commit in using them.
   */
  static int
  tulip_read_macaddr(tulip_softc_t * const sc)
  {
      unsigned cksum, rom_cksum, idx;
      u_int32_t csr;
      unsigned char tmpbuf[8];
      static const u_char testpat[] = { 0xFF, 0, 0x55, 0xAA, 0xFF, 0, 0x55, 0xAA };
  
      sc->tulip_connidx = TULIP_SROM_LASTCONNIDX;
  
      if (sc->tulip_chipid == TULIP_21040) {
          TULIP_CSR_WRITE(sc, csr_enetrom, 1);
          for (idx = 0; idx < sizeof(sc->tulip_rombuf); idx++) {
              int cnt = 0;
              while (((csr = TULIP_CSR_READ(sc, csr_enetrom)) & 0x80000000L) && cnt < 10000)
                  cnt++;
              sc->tulip_rombuf[idx] = csr & 0xFF;
          }
          sc->tulip_boardsw = &tulip_21040_boardsw;
      } else {
          if (sc->tulip_chipid == TULIP_21041) {
              /*
               * Thankfully all 21041's act the same.
               */
              sc->tulip_boardsw = &tulip_21041_boardsw;
          } else {
              /*
               * Assume all 21140 board are compatible with the
               * DEC 10/100 evaluation board.  Not really valid but
               * it's the best we can do until every one switches to
               * the new SROM format.
               */
  
              sc->tulip_boardsw = &tulip_21140_eb_boardsw;
          }
          tulip_srom_read(sc);
          if (tulip_srom_crcok(sc->tulip_rombuf)) {
              /*
               * SROM CRC is valid therefore it must be in the
               * new format.
               */
              sc->tulip_features |= TULIP_HAVE_ISVSROM|TULIP_HAVE_OKSROM;
          } else if (sc->tulip_rombuf[126] == 0xff && sc->tulip_rombuf[127] == 0xFF) {
              /*
               * No checksum is present.  See if the SROM id checks out;
               * the first 18 bytes should be 0 followed by a 1 followed
               * by the number of adapters (which we don't deal with yet).
               */
              for (idx = 0; idx < 18; idx++) {
                  if (sc->tulip_rombuf[idx] != 0)
                      break;
              }
              if (idx == 18 && sc->tulip_rombuf[18] == 1 && sc->tulip_rombuf[19] != 0)
                  sc->tulip_features |= TULIP_HAVE_ISVSROM;
          } else if (sc->tulip_chipid >= TULIP_21142) {
              sc->tulip_features |= TULIP_HAVE_ISVSROM;
              sc->tulip_boardsw = &tulip_2114x_isv_boardsw;
          }
          if ((sc->tulip_features & TULIP_HAVE_ISVSROM) && tulip_srom_decode(sc)) {
              if (sc->tulip_chipid != TULIP_21041)
                  sc->tulip_boardsw = &tulip_2114x_isv_boardsw;
  
              /*
               * If the SROM specifies more than one adapter, tag this as a
               * BASE rom.
               */
              if (sc->tulip_rombuf[19] > 1)
                  sc->tulip_features |= TULIP_HAVE_BASEROM;
              if (sc->tulip_boardsw == NULL)
                  return -6;
              goto check_oui;
          }
      }
  
  
      if (bcmp(&sc->tulip_rombuf[0], &sc->tulip_rombuf[16], 8) != 0) {
          /*
           * Some folks don't use the standard ethernet rom format
           * but instead just put the address in the first 6 bytes
           * of the rom and let the rest be all 0xffs.  (Can we say
           * ZNYX?) (well sometimes they put in a checksum so we'll
           * start at 8).
           */
          for (idx = 8; idx < 32; idx++) {
              if (sc->tulip_rombuf[idx] != 0xFF)
                  return -4;
          }
          /*
           * Make sure the address is not multicast or locally assigned
           * that the OUI is not 00-00-00.
           */
          if ((sc->tulip_rombuf[0] & 3) != 0)
              return -4;
          if (sc->tulip_rombuf[0] == 0 && sc->tulip_rombuf[1] == 0
                  && sc->tulip_rombuf[2] == 0)
              return -4;
          bcopy(sc->tulip_rombuf, sc->tulip_enaddr, 6);
          sc->tulip_features |= TULIP_HAVE_OKROM;
          goto check_oui;
      } else {
          /*
           * A number of makers of multiport boards (ZNYX and Cogent)
           * only put on one address ROM on their 21040 boards.  So
           * if the ROM is all zeros (or all 0xFFs), look at the
           * previous configured boards (as long as they are on the same
           * PCI bus and the bus number is non-zero) until we find the
           * master board with address ROM.  We then use its address ROM
           * as the base for this board.  (we add our relative board
           * to the last byte of its address).
           */
          for (idx = 0; idx < sizeof(sc->tulip_rombuf); idx++) {
              if (sc->tulip_rombuf[idx] != 0 && sc->tulip_rombuf[idx] != 0xFF)
                  break;
          }
          if (idx == sizeof(sc->tulip_rombuf)) {
              int root_unit;
              tulip_softc_t *root_sc = NULL;
              for (root_unit = sc->tulip_unit - 1; root_unit >= 0; root_unit--) {
                  root_sc = tulips[root_unit];
                  if (root_sc == NULL || (root_sc->tulip_features & (TULIP_HAVE_OKROM|TULIP_HAVE_SLAVEDROM)) == TULIP_HAVE_OKROM)
                      break;
                  root_sc = NULL;
              }
              if (root_sc != NULL && (root_sc->tulip_features & TULIP_HAVE_BASEROM)
                      && root_sc->tulip_chipid == sc->tulip_chipid
                      && root_sc->tulip_pci_busno == sc->tulip_pci_busno) {
                  sc->tulip_features |= TULIP_HAVE_SLAVEDROM;
                  sc->tulip_boardsw = root_sc->tulip_boardsw;
                  strcpy(sc->tulip_boardid, root_sc->tulip_boardid);
                  if (sc->tulip_boardsw->bd_type == TULIP_21140_ISV) {
                      bcopy(root_sc->tulip_rombuf, sc->tulip_rombuf,
                            sizeof(sc->tulip_rombuf));
                      if (!tulip_srom_decode(sc))
                          return -5;
                  } else {
                      bcopy(root_sc->tulip_enaddr, sc->tulip_enaddr, 6);
                      sc->tulip_enaddr[5] += sc->tulip_unit - root_sc->tulip_unit;
                  }
                  /*
                   * Now for a truly disgusting kludge: all 4 21040s on
                   * the ZX314 share the same INTA line so the mapping
                   * setup by the BIOS on the PCI bridge is worthless.
                   * Rather than reprogramming the value in the config
                   * register, we will handle this internally.
                   */
                  if (root_sc->tulip_features & TULIP_HAVE_SHAREDINTR) {
                      sc->tulip_slaves = root_sc->tulip_slaves;
                      root_sc->tulip_slaves = sc;
                      sc->tulip_features |= TULIP_HAVE_SLAVEDINTR;
                  }
                  return 0;
              }
          }
      }
  
      /*
       * This is the standard DEC address ROM test.
       */
  
      if (bcmp(&sc->tulip_rombuf[24], testpat, 8) != 0)
          return -3;
  
      tmpbuf[0] = sc->tulip_rombuf[15]; tmpbuf[1] = sc->tulip_rombuf[14];
      tmpbuf[2] = sc->tulip_rombuf[13]; tmpbuf[3] = sc->tulip_rombuf[12];
      tmpbuf[4] = sc->tulip_rombuf[11]; tmpbuf[5] = sc->tulip_rombuf[10];
      tmpbuf[6] = sc->tulip_rombuf[9];  tmpbuf[7] = sc->tulip_rombuf[8];
      if (bcmp(&sc->tulip_rombuf[0], tmpbuf, 8) != 0)
          return -2;
  
      bcopy(sc->tulip_rombuf, sc->tulip_enaddr, 6);
  
      cksum = *(u_int16_t *) &sc->tulip_enaddr[0];
      cksum *= 2;
      if (cksum > 65535) cksum -= 65535;
      cksum += *(u_int16_t *) &sc->tulip_enaddr[2];
      if (cksum > 65535) cksum -= 65535;
      cksum *= 2;
      if (cksum > 65535) cksum -= 65535;
      cksum += *(u_int16_t *) &sc->tulip_enaddr[4];
      if (cksum >= 65535) cksum -= 65535;
  
      rom_cksum = *(u_int16_t *) &sc->tulip_rombuf[6];
          
      if (cksum != rom_cksum)
          return -1;
  
    check_oui:
      /*
       * Check for various boards based on OUI.  Did I say braindead?
       */
      for (idx = 0; tulip_vendors[idx].vendor_identify_nic != NULL; idx++) {
          if (bcmp(sc->tulip_enaddr, tulip_vendors[idx].vendor_oui, 3) == 0) {
              (*tulip_vendors[idx].vendor_identify_nic)(sc);
              break;
          }
      }
  
      sc->tulip_features |= TULIP_HAVE_OKROM;
      return 0;
  }
  
  static void
  tulip_ifmedia_add(tulip_softc_t * const sc)
  {
      tulip_media_t media;
      int medias = 0;
  
      TULIP_LOCK_ASSERT(sc);
      for (media = TULIP_MEDIA_UNKNOWN; media < TULIP_MEDIA_MAX; media++) {
          if (sc->tulip_mediums[media] != NULL) {
              ifmedia_add(&sc->tulip_ifmedia, tulip_media_to_ifmedia[media],
                          0, 0);
              medias++;
          }
      }
      if (medias == 0) {
          sc->tulip_features |= TULIP_HAVE_NOMEDIA;
          ifmedia_add(&sc->tulip_ifmedia, IFM_ETHER | IFM_NONE, 0, 0);
          ifmedia_set(&sc->tulip_ifmedia, IFM_ETHER | IFM_NONE);
      } else if (sc->tulip_media == TULIP_MEDIA_UNKNOWN) {
          ifmedia_add(&sc->tulip_ifmedia, IFM_ETHER | IFM_AUTO, 0, 0);
          ifmedia_set(&sc->tulip_ifmedia, IFM_ETHER | IFM_AUTO);
      } else {
          ifmedia_set(&sc->tulip_ifmedia, tulip_media_to_ifmedia[sc->tulip_media]);
          sc->tulip_flags |= TULIP_PRINTMEDIA;
          tulip_linkup(sc, sc->tulip_media);
      }
  }
  
  static int
  tulip_ifmedia_change(struct ifnet * const ifp)
  {
      tulip_softc_t * const sc = (tulip_softc_t *)ifp->if_softc;
  
      TULIP_LOCK(sc);
      sc->tulip_flags |= TULIP_NEEDRESET;
      sc->tulip_probe_state = TULIP_PROBE_INACTIVE;
      sc->tulip_media = TULIP_MEDIA_UNKNOWN;
      if (IFM_SUBTYPE(sc->tulip_ifmedia.ifm_media) != IFM_AUTO) {
          tulip_media_t media;
          for (media = TULIP_MEDIA_UNKNOWN; media < TULIP_MEDIA_MAX; media++) {
              if (sc->tulip_mediums[media] != NULL
                  && sc->tulip_ifmedia.ifm_media == tulip_media_to_ifmedia[media]) {
                  sc->tulip_flags |= TULIP_PRINTMEDIA;
                  sc->tulip_flags &= ~TULIP_DIDNWAY;
                  tulip_linkup(sc, media);
                  TULIP_UNLOCK(sc);
                  return 0;
              }
          }
      }
      sc->tulip_flags &= ~(TULIP_TXPROBE_ACTIVE|TULIP_WANTRXACT);
      tulip_reset(sc);
      tulip_init_locked(sc);
      TULIP_UNLOCK(sc);
      return 0;
  }
  
  /*
   * Media status callback
   */
  static void
  tulip_ifmedia_status(struct ifnet * const ifp, struct ifmediareq *req)
  {
      tulip_softc_t *sc = (tulip_softc_t *)ifp->if_softc;
  
      TULIP_LOCK(sc);
      if (sc->tulip_media == TULIP_MEDIA_UNKNOWN) {
          TULIP_UNLOCK(sc);
          return;
      }
  
      req->ifm_status = IFM_AVALID;
      if (sc->tulip_flags & TULIP_LINKUP)
          req->ifm_status |= IFM_ACTIVE;
  
      req->ifm_active = tulip_media_to_ifmedia[sc->tulip_media];
      TULIP_UNLOCK(sc);
  }
  
  static void
  tulip_addr_filter(tulip_softc_t * const sc)
  {
      struct ifmultiaddr *ifma;
      struct ifnet *ifp;
      u_char *addrp;
      u_int16_t eaddr[ETHER_ADDR_LEN/2];
      int multicnt;
  
      TULIP_LOCK_ASSERT(sc);
      sc->tulip_flags &= ~(TULIP_WANTHASHPERFECT|TULIP_WANTHASHONLY|TULIP_ALLMULTI);
      sc->tulip_flags |= TULIP_WANTSETUP|TULIP_WANTTXSTART;
      sc->tulip_cmdmode &= ~TULIP_CMD_RXRUN;
      sc->tulip_intrmask &= ~TULIP_STS_RXSTOPPED;
  #if defined(IFF_ALLMULTI)    
      if (sc->tulip_ifp->if_flags & IFF_ALLMULTI)
          sc->tulip_flags |= TULIP_ALLMULTI ;
  #endif
  
      multicnt = 0;
      ifp = sc->tulip_ifp;      
      if_maddr_rlock(ifp);
  
      /* Copy MAC address on stack to align. */
      if (ifp->if_input != NULL)
          bcopy(IF_LLADDR(ifp), eaddr, ETHER_ADDR_LEN);
      else
          bcopy(sc->tulip_enaddr, eaddr, ETHER_ADDR_LEN);
  
      TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
  
              if (ifma->ifma_addr->sa_family == AF_LINK)
                  multicnt++;
      }
  
      if (multicnt > 14) {
          u_int32_t *sp = sc->tulip_setupdata;
          unsigned hash;
          /*
           * Some early passes of the 21140 have broken implementations of
           * hash-perfect mode.  When we get too many multicasts for perfect
           * filtering with these chips, we need to switch into hash-only
           * mode (this is better than all-multicast on network with lots
           * of multicast traffic).
           */
          if (sc->tulip_features & TULIP_HAVE_BROKEN_HASH)
              sc->tulip_flags |= TULIP_WANTHASHONLY;
          else
              sc->tulip_flags |= TULIP_WANTHASHPERFECT;
          /*
           * If we have more than 14 multicasts, we have
           * go into hash perfect mode (512 bit multicast
           * hash and one perfect hardware).
           */
          bzero(sc->tulip_setupdata, sizeof(sc->tulip_setupdata));
  
          TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
  
                  if (ifma->ifma_addr->sa_family != AF_LINK)
                          continue;
  
                  hash = tulip_mchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
                  sp[hash >> 4] |= htole32(1 << (hash & 0xF));
          }
          /*
           * No reason to use a hash if we are going to be
           * receiving every multicast.
           */
          if ((sc->tulip_flags & TULIP_ALLMULTI) == 0) {
              hash = tulip_mchash(ifp->if_broadcastaddr);
              sp[hash >> 4] |= htole32(1 << (hash & 0xF));
              if (sc->tulip_flags & TULIP_WANTHASHONLY) {
                  hash = tulip_mchash((caddr_t)eaddr);
                  sp[hash >> 4] |= htole32(1 << (hash & 0xF));
              } else {
                  sp[39] = TULIP_SP_MAC(eaddr[0]); 
                  sp[40] = TULIP_SP_MAC(eaddr[1]); 
                  sp[41] = TULIP_SP_MAC(eaddr[2]);
              }
          }
      }
      if ((sc->tulip_flags & (TULIP_WANTHASHPERFECT|TULIP_WANTHASHONLY)) == 0) {
          u_int32_t *sp = sc->tulip_setupdata;
          int idx = 0;
          if ((sc->tulip_flags & TULIP_ALLMULTI) == 0) {
              /*
               * Else can get perfect filtering for 16 addresses.
               */
              TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
                      if (ifma->ifma_addr->sa_family != AF_LINK)
                              continue;
                      addrp = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
                      *sp++ = TULIP_SP_MAC(((u_int16_t *)addrp)[0]); 
                      *sp++ = TULIP_SP_MAC(((u_int16_t *)addrp)[1]); 
                      *sp++ = TULIP_SP_MAC(((u_int16_t *)addrp)[2]);
                      idx++;
              }
              /*
               * Add the broadcast address.
               */
              idx++;
              *sp++ = TULIP_SP_MAC(0xFFFF);
              *sp++ = TULIP_SP_MAC(0xFFFF);
              *sp++ = TULIP_SP_MAC(0xFFFF);
          }
          /*
           * Pad the rest with our hardware address
           */
          for (; idx < 16; idx++) {
              *sp++ = TULIP_SP_MAC(eaddr[0]); 
              *sp++ = TULIP_SP_MAC(eaddr[1]); 
              *sp++ = TULIP_SP_MAC(eaddr[2]);
          }
      }
      if_maddr_runlock(ifp);
  }
  
  static void
  tulip_reset(tulip_softc_t * const sc)
  {
      tulip_ringinfo_t *ri;
      tulip_descinfo_t *di;
      struct mbuf *m;
      u_int32_t inreset = (sc->tulip_flags & TULIP_INRESET);
  
      TULIP_LOCK_ASSERT(sc);
  
      CTR1(KTR_TULIP, "tulip_reset: inreset %d", inreset);
  
      /*
       * Brilliant.  Simply brilliant.  When switching modes/speeds
       * on a 2114*, you need to set the appriopriate MII/PCS/SCL/PS
       * bits in CSR6 and then do a software reset to get the 21140
       * to properly reset its internal pathways to the right places.
       *   Grrrr.
       */
      if ((sc->tulip_flags & TULIP_DEVICEPROBE) == 0
              && sc->tulip_boardsw->bd_media_preset != NULL)
          (*sc->tulip_boardsw->bd_media_preset)(sc);
  
      TULIP_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
      DELAY(10);  /* Wait 10 microseconds (actually 50 PCI cycles but at 
                     33MHz that comes to two microseconds but wait a
                     bit longer anyways) */
  
      if (!inreset) {
          sc->tulip_flags |= TULIP_INRESET;
          sc->tulip_flags &= ~(TULIP_NEEDRESET|TULIP_RXBUFSLOW);
          sc->tulip_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
      }
  
      TULIP_CSR_WRITE(sc, csr_txlist, sc->tulip_txinfo.ri_dma_addr & 0xffffffff);
      TULIP_CSR_WRITE(sc, csr_rxlist, sc->tulip_rxinfo.ri_dma_addr & 0xffffffff);
      TULIP_CSR_WRITE(sc, csr_busmode,
                      (1 << (3 /*pci_max_burst_len*/ + 8))
                      |TULIP_BUSMODE_CACHE_ALIGN8
                      |TULIP_BUSMODE_READMULTIPLE
                      |(BYTE_ORDER != LITTLE_ENDIAN ?
                        TULIP_BUSMODE_DESC_BIGENDIAN : 0));
  
      sc->tulip_txtimer = 0;
      /*
       * Free all the mbufs that were on the transmit ring.
       */
      CTR0(KTR_TULIP, "tulip_reset: drain transmit ring");
      ri = &sc->tulip_txinfo;
      for (di = ri->ri_first; di < ri->ri_last; di++) {
          m = tulip_dequeue_mbuf(ri, di, SYNC_NONE);
          if (m != NULL)
              m_freem(m);
          di->di_desc->d_status = 0;
      }
  
      ri->ri_nextin = ri->ri_nextout = ri->ri_first;
      ri->ri_free = ri->ri_max;
      TULIP_TXDESC_PRESYNC(ri);
  
      /*
       * We need to collect all the mbufs that were on the 
       * receive ring before we reinit it either to put
       * them back on or to know if we have to allocate
       * more.
       */
      CTR0(KTR_TULIP, "tulip_reset: drain receive ring");
      ri = &sc->tulip_rxinfo;
      ri->ri_nextin = ri->ri_nextout = ri->ri_first;
      ri->ri_free = ri->ri_max;
      for (di = ri->ri_first; di < ri->ri_last; di++) {
          di->di_desc->d_status = 0;
          di->di_desc->d_length1 = 0; di->di_desc->d_addr1 = 0;
          di->di_desc->d_length2 = 0; di->di_desc->d_addr2 = 0;
      }
      TULIP_RXDESC_PRESYNC(ri);
      for (di = ri->ri_first; di < ri->ri_last; di++) {
          m = tulip_dequeue_mbuf(ri, di, SYNC_NONE);
          if (m != NULL)
              m_freem(m);
      }
  
      /*
       * If tulip_reset is being called recursively, exit quickly knowing
       * that when the outer tulip_reset returns all the right stuff will
       * have happened.
       */
      if (inreset)
          return;
  
      sc->tulip_intrmask |= TULIP_STS_NORMALINTR|TULIP_STS_RXINTR|TULIP_STS_TXINTR
          |TULIP_STS_ABNRMLINTR|TULIP_STS_SYSERROR|TULIP_STS_TXSTOPPED
          |TULIP_STS_TXUNDERFLOW|TULIP_STS_TXBABBLE
          |TULIP_STS_RXSTOPPED;
  
      if ((sc->tulip_flags & TULIP_DEVICEPROBE) == 0)
          (*sc->tulip_boardsw->bd_media_select)(sc);
  #if defined(TULIP_DEBUG)
      if ((sc->tulip_flags & TULIP_NEEDRESET) == TULIP_NEEDRESET)
          device_printf(sc->tulip_dev,
              "tulip_reset: additional reset needed?!?\n");
  #endif
      if (bootverbose)
              tulip_media_print(sc);
      if (sc->tulip_features & TULIP_HAVE_DUALSENSE)
          TULIP_CSR_WRITE(sc, csr_sia_status, TULIP_CSR_READ(sc, csr_sia_status));
  
      sc->tulip_flags &= ~(TULIP_DOINGSETUP|TULIP_WANTSETUP|TULIP_INRESET
                           |TULIP_RXACT);
  }
  
  
  static void
  tulip_init(void *arg)
  {
      tulip_softc_t *sc = (tulip_softc_t *)arg;
  
      TULIP_LOCK(sc);
      tulip_init_locked(sc);
      TULIP_UNLOCK(sc);
  }
  
  static void
  tulip_init_locked(tulip_softc_t * const sc)
  {
      CTR0(KTR_TULIP, "tulip_init_locked");
      if (sc->tulip_ifp->if_flags & IFF_UP) {
          if ((sc->tulip_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
              /* initialize the media */
              CTR0(KTR_TULIP, "tulip_init_locked: up but not running, reset chip");
              tulip_reset(sc);
          }
          tulip_addr_filter(sc);
          sc->tulip_ifp->if_drv_flags |= IFF_DRV_RUNNING;
          if (sc->tulip_ifp->if_flags & IFF_PROMISC) {
              sc->tulip_flags |= TULIP_PROMISC;
              sc->tulip_cmdmode |= TULIP_CMD_PROMISCUOUS;
              sc->tulip_intrmask |= TULIP_STS_TXINTR;
          } else {
              sc->tulip_flags &= ~TULIP_PROMISC;
              sc->tulip_cmdmode &= ~TULIP_CMD_PROMISCUOUS;
              if (sc->tulip_flags & TULIP_ALLMULTI) {
                  sc->tulip_cmdmode |= TULIP_CMD_ALLMULTI;
              } else {
                  sc->tulip_cmdmode &= ~TULIP_CMD_ALLMULTI;
              }
          }
          sc->tulip_cmdmode |= TULIP_CMD_TXRUN;
          if ((sc->tulip_flags & (TULIP_TXPROBE_ACTIVE|TULIP_WANTSETUP)) == 0) {
              tulip_rx_intr(sc);
              sc->tulip_cmdmode |= TULIP_CMD_RXRUN;
              sc->tulip_intrmask |= TULIP_STS_RXSTOPPED;
          } else {
              sc->tulip_ifp->if_drv_flags |= IFF_DRV_OACTIVE;
              sc->tulip_cmdmode &= ~TULIP_CMD_RXRUN;
              sc->tulip_intrmask &= ~TULIP_STS_RXSTOPPED;
          }
          CTR2(KTR_TULIP, "tulip_init_locked: intr mask %08x  cmdmode %08x",
              sc->tulip_intrmask, sc->tulip_cmdmode);
          TULIP_CSR_WRITE(sc, csr_intr, sc->tulip_intrmask);
          TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode);
          CTR1(KTR_TULIP, "tulip_init_locked: status %08x\n",
              TULIP_CSR_READ(sc, csr_status));
          if ((sc->tulip_flags & (TULIP_WANTSETUP|TULIP_TXPROBE_ACTIVE)) == TULIP_WANTSETUP)
              tulip_txput_setup(sc);
      } else {
          CTR0(KTR_TULIP, "tulip_init_locked: not up, reset chip");
          sc->tulip_ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
          tulip_reset(sc);
          tulip_addr_filter(sc);
      }
  }
  
  #define DESC_STATUS(di) (((volatile tulip_desc_t *)((di)->di_desc))->d_status)
  #define DESC_FLAG(di)   ((di)->di_desc->d_flag)
  
  static void
  tulip_rx_intr(tulip_softc_t * const sc)
  {
      TULIP_PERFSTART(rxintr)
      tulip_ringinfo_t * const ri = &sc->tulip_rxinfo;
      struct ifnet * const ifp = sc->tulip_ifp;
      int fillok = 1;
  #if defined(TULIP_DEBUG)
      int cnt = 0;
  #endif
  
      TULIP_LOCK_ASSERT(sc);
      CTR0(KTR_TULIP, "tulip_rx_intr: start");
      for (;;) {
          TULIP_PERFSTART(rxget)
          tulip_descinfo_t *eop = ri->ri_nextin, *dip;
          int total_len = 0, last_offset = 0;
          struct mbuf *ms = NULL, *me = NULL;
          int accept = 0;
          int error;
  
          if (fillok && (ri->ri_max - ri->ri_free) < TULIP_RXQ_TARGET)
              goto queue_mbuf;
  
  #if defined(TULIP_DEBUG)
          if (cnt == ri->ri_max)
              break;
  #endif
          /*
           * 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.
           */
          TULIP_RXDESC_POSTSYNC(ri);
          if ((DESC_STATUS(eop) & (TULIP_DSTS_OWNER|TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) == (TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) {
              ms = tulip_dequeue_mbuf(ri, eop, SYNC_RX);
              CTR2(KTR_TULIP,
                  "tulip_rx_intr: single packet mbuf %p from descriptor %td", ms,
                  eop - ri->ri_first);
              me = ms;
              ri->ri_free++;
          } else {
              /*
               * If still owned by the TULIP, don't touch it.
               */
              if (DESC_STATUS(eop) & TULIP_DSTS_OWNER)
                  break;
  
              /*
               * It is possible (though improbable unless MCLBYTES < 1518) for
               * a received packet to cross more than one receive descriptor.
               * We first loop through the descriptor ring making sure we have
               * received a complete packet.  If not, we bail until the next
               * interrupt.
               */
              dip = eop;
              while ((DESC_STATUS(eop) & TULIP_DSTS_RxLASTDESC) == 0) {
                  if (++eop == ri->ri_last)
                      eop = ri->ri_first;
                  TULIP_RXDESC_POSTSYNC(ri);
                  if (eop == ri->ri_nextout || DESC_STATUS(eop) & TULIP_DSTS_OWNER) {
  #if defined(TULIP_DEBUG)
                      sc->tulip_dbg.dbg_rxintrs++;
                      sc->tulip_dbg.dbg_rxpktsperintr[cnt]++;
  #endif
                      TULIP_PERFEND(rxget);
                      TULIP_PERFEND(rxintr);
                      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 ourselves from
               * doing a multiplication by 0 in the normal case).
               */
              ms = tulip_dequeue_mbuf(ri, dip, SYNC_RX);
              CTR2(KTR_TULIP,
                  "tulip_rx_intr: start packet mbuf %p from descriptor %td", ms,
                  dip - ri->ri_first);
              ri->ri_free++;
              for (me = ms; total_len > 0; total_len--) {
                  me->m_len = TULIP_RX_BUFLEN;
                  last_offset += TULIP_RX_BUFLEN;
                  if (++dip == ri->ri_last)
                      dip = ri->ri_first;
                  me->m_next = tulip_dequeue_mbuf(ri, dip, SYNC_RX);
                  ri->ri_free++;
                  me = me->m_next;
                  CTR2(KTR_TULIP,
                      "tulip_rx_intr: cont packet mbuf %p from descriptor %td",
                      me, dip - ri->ri_first);
              }
              KASSERT(dip == eop, ("mismatched descinfo structs"));
          }
  
          /*
           *  Now get the size of received packet (minus the CRC).
           */
          total_len = ((DESC_STATUS(eop) >> 16) & 0x7FFF) - ETHER_CRC_LEN;
          if ((sc->tulip_flags & TULIP_RXIGNORE) == 0
              && ((DESC_STATUS(eop) & TULIP_DSTS_ERRSUM) == 0)) {
              me->m_len = total_len - last_offset;
              sc->tulip_flags |= TULIP_RXACT;
              accept = 1;
              CTR1(KTR_TULIP, "tulip_rx_intr: good packet; length %d",
                  total_len);
          } else {
              CTR1(KTR_TULIP, "tulip_rx_intr: bad packet; status %08x",
                  DESC_STATUS(eop));
              ifp->if_ierrors++;
              if (DESC_STATUS(eop) & (TULIP_DSTS_RxBADLENGTH|TULIP_DSTS_RxOVERFLOW|TULIP_DSTS_RxWATCHDOG)) {
                  sc->tulip_dot3stats.dot3StatsInternalMacReceiveErrors++;
              } else {
  #if defined(TULIP_VERBOSE)
                  const char *error = NULL;
  #endif
                  if (DESC_STATUS(eop) & TULIP_DSTS_RxTOOLONG) {
                      sc->tulip_dot3stats.dot3StatsFrameTooLongs++;
  #if defined(TULIP_VERBOSE)
                      error = "frame too long";
  #endif
                  }
                  if (DESC_STATUS(eop) & TULIP_DSTS_RxBADCRC) {
                      if (DESC_STATUS(eop) & TULIP_DSTS_RxDRBBLBIT) {
                          sc->tulip_dot3stats.dot3StatsAlignmentErrors++;
  #if defined(TULIP_VERBOSE)
                          error = "alignment error";
  #endif
                      } else {
                          sc->tulip_dot3stats.dot3StatsFCSErrors++;
  #if defined(TULIP_VERBOSE)
                          error = "bad crc";
  #endif
                      }
                  }
  #if defined(TULIP_VERBOSE)
                  if (error != NULL && (sc->tulip_flags & TULIP_NOMESSAGES) == 0) {
                      device_printf(sc->tulip_dev, "receive: %6D: %s\n",
                             mtod(ms, u_char *) + 6, ":",
                             error);
                      sc->tulip_flags |= TULIP_NOMESSAGES;
                  }
  #endif
              }
  
          }
  #if defined(TULIP_DEBUG)
          cnt++;
  #endif
          ifp->if_ipackets++;
          if (++eop == ri->ri_last)
              eop = ri->ri_first;
          ri->ri_nextin = eop;
        queue_mbuf:
          /*
           * We have received a good packet that needs to be passed up the
           * stack.
           */
          if (accept) {
              struct mbuf *m0;
  
              KASSERT(ms != NULL, ("no packet to accept"));
  #ifndef __NO_STRICT_ALIGNMENT
              /*
               * Copy the data into a new mbuf that is properly aligned.  If
               * we fail to allocate a new mbuf, then drop the packet.  We will
               * reuse the same rx buffer ('ms') below for another packet
               * regardless.
               */
              m0 = m_devget(mtod(ms, caddr_t), total_len, ETHER_ALIGN, ifp, NULL);
              if (m0 == NULL) {
                  ifp->if_ierrors++;
                  goto skip_input;
              }
  #else
              /*
               * Update the header for the mbuf referencing this receive
               * buffer and pass it up the stack.  Allocate a new mbuf cluster
               * to replace the one we just passed up the stack.
               *
               * 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 at the beginning of
               * the loop to refill for the extra consumed mbufs.
               */
              ms->m_pkthdr.len = total_len;
              ms->m_pkthdr.rcvif = ifp;
              m0 = ms;
              ms = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
  #endif
              TULIP_UNLOCK(sc);
              CTR1(KTR_TULIP, "tulip_rx_intr: passing %p to upper layer", m0);
              (*ifp->if_input)(ifp, m0);
              TULIP_LOCK(sc);
          } else if (ms == NULL)
              /*
               * If we are priming the TULIP with mbufs, then allocate
               * a new cluster for the next descriptor.
               */
              ms = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
  
  #ifndef __NO_STRICT_ALIGNMENT
      skip_input:
  #endif
          if (ms == NULL) {
              /*
               * Couldn't allocate a new buffer.  Don't bother 
               * trying to replenish the receive queue.
               */
              fillok = 0;
              sc->tulip_flags |= TULIP_RXBUFSLOW;
  #if defined(TULIP_DEBUG)
              sc->tulip_dbg.dbg_rxlowbufs++;
  #endif
              TULIP_PERFEND(rxget);
              continue;
          }
          /*
           * Now give the buffer(s) to the TULIP and save in our
           * receive queue.
           */
          do {
              tulip_descinfo_t * const nextout = ri->ri_nextout;
  
              M_ASSERTPKTHDR(ms);
              KASSERT(ms->m_data == ms->m_ext.ext_buf,
                  ("rx mbuf data doesn't point to cluster"));         
              ms->m_len = ms->m_pkthdr.len = TULIP_RX_BUFLEN;
              error = bus_dmamap_load_mbuf(ri->ri_data_tag, *nextout->di_map, ms,
                  tulip_dma_map_rxbuf, nextout->di_desc, BUS_DMA_NOWAIT);
              if (error) {
                  device_printf(sc->tulip_dev,
                      "unable to load rx map, error = %d\n", error);
                  panic("tulip_rx_intr");         /* XXX */
              }
              nextout->di_desc->d_status = TULIP_DSTS_OWNER;
              KASSERT(nextout->di_mbuf == NULL, ("clobbering earlier rx mbuf"));
              nextout->di_mbuf = ms;
              CTR2(KTR_TULIP, "tulip_rx_intr: enqueued mbuf %p to descriptor %td",
                  ms, nextout - ri->ri_first);
              TULIP_RXDESC_POSTSYNC(ri);
              if (++ri->ri_nextout == ri->ri_last)
                  ri->ri_nextout = ri->ri_first;
              ri->ri_free--;
              me = ms->m_next;
              ms->m_next = NULL;
          } while ((ms = me) != NULL);
  
          if ((ri->ri_max - ri->ri_free) >= TULIP_RXQ_TARGET)
              sc->tulip_flags &= ~TULIP_RXBUFSLOW;
          TULIP_PERFEND(rxget);
      }
  
  #if defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_rxintrs++;
      sc->tulip_dbg.dbg_rxpktsperintr[cnt]++;
  #endif
      TULIP_PERFEND(rxintr);
  }
  
  static int
  tulip_tx_intr(tulip_softc_t * const sc)
  {
      TULIP_PERFSTART(txintr)    
      tulip_ringinfo_t * const ri = &sc->tulip_txinfo;
      struct mbuf *m;
      int xmits = 0;
      int descs = 0;
  
      CTR0(KTR_TULIP, "tulip_tx_intr: start");
      TULIP_LOCK_ASSERT(sc);
      while (ri->ri_free < ri->ri_max) {
          u_int32_t d_flag;
  
          TULIP_TXDESC_POSTSYNC(ri);
          if (DESC_STATUS(ri->ri_nextin) & TULIP_DSTS_OWNER)
              break;
  
          ri->ri_free++;
          descs++;
          d_flag = DESC_FLAG(ri->ri_nextin);
          if (d_flag & TULIP_DFLAG_TxLASTSEG) {
              if (d_flag & TULIP_DFLAG_TxSETUPPKT) {
                  CTR2(KTR_TULIP,
                      "tulip_tx_intr: setup packet from descriptor %td: %08x",
                      ri->ri_nextin - ri->ri_first, DESC_STATUS(ri->ri_nextin));
                  /*
                   * We've just finished processing a setup packet.
                   * Mark that we finished it.  If there's not
                   * another pending, startup the TULIP receiver.
                   * Make sure we ack the RXSTOPPED so we won't get
                   * an abormal interrupt indication.
                   */
                  bus_dmamap_sync(sc->tulip_setup_tag, sc->tulip_setup_map,
                      BUS_DMASYNC_POSTWRITE);
                  sc->tulip_flags &= ~(TULIP_DOINGSETUP|TULIP_HASHONLY);
                  if (DESC_FLAG(ri->ri_nextin) & TULIP_DFLAG_TxINVRSFILT)
                      sc->tulip_flags |= TULIP_HASHONLY;
                  if ((sc->tulip_flags & (TULIP_WANTSETUP|TULIP_TXPROBE_ACTIVE)) == 0) {
                      tulip_rx_intr(sc);
                      sc->tulip_cmdmode |= TULIP_CMD_RXRUN;
                      sc->tulip_intrmask |= TULIP_STS_RXSTOPPED;
                      CTR2(KTR_TULIP,
                          "tulip_tx_intr: intr mask %08x  cmdmode %08x",
                          sc->tulip_intrmask, sc->tulip_cmdmode);
                      TULIP_CSR_WRITE(sc, csr_status, TULIP_STS_RXSTOPPED);
                      TULIP_CSR_WRITE(sc, csr_intr, sc->tulip_intrmask);
                      TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode);
                  }
              } else {
                  const u_int32_t d_status = DESC_STATUS(ri->ri_nextin);
  
                  m = tulip_dequeue_mbuf(ri, ri->ri_nextin, SYNC_TX);
                  CTR2(KTR_TULIP,
                      "tulip_tx_intr: data packet %p from descriptor %td", m,
                      ri->ri_nextin - ri->ri_first);
                  if (m != NULL) {
                      m_freem(m);
  #if defined(TULIP_DEBUG)
                  } else {
                      device_printf(sc->tulip_dev,
                          "tx_intr: failed to dequeue mbuf?!?\n");
  #endif
                  }
                  if (sc->tulip_flags & TULIP_TXPROBE_ACTIVE) {
                      tulip_mediapoll_event_t event = TULIP_MEDIAPOLL_TXPROBE_OK;
                      if (d_status & (TULIP_DSTS_TxNOCARR|TULIP_DSTS_TxEXCCOLL)) {
  #if defined(TULIP_DEBUG)
                          if (d_status & TULIP_DSTS_TxNOCARR)
                              sc->tulip_dbg.dbg_txprobe_nocarr++;
                          if (d_status & TULIP_DSTS_TxEXCCOLL)
                              sc->tulip_dbg.dbg_txprobe_exccoll++;
  #endif
                          event = TULIP_MEDIAPOLL_TXPROBE_FAILED;
                      }
                      (*sc->tulip_boardsw->bd_media_poll)(sc, event);
                      /*
                       * Escape from the loop before media poll has reset the TULIP!
                       */
                      break;
                  } else {
                      xmits++;
                      if (d_status & TULIP_DSTS_ERRSUM) {
                          CTR1(KTR_TULIP, "tulip_tx_intr: output error: %08x",
                              d_status);
                          sc->tulip_ifp->if_oerrors++;
                          if (d_status & TULIP_DSTS_TxEXCCOLL)
                              sc->tulip_dot3stats.dot3StatsExcessiveCollisions++;
                          if (d_status & TULIP_DSTS_TxLATECOLL)
                              sc->tulip_dot3stats.dot3StatsLateCollisions++;
                          if (d_status & (TULIP_DSTS_TxNOCARR|TULIP_DSTS_TxCARRLOSS))
                              sc->tulip_dot3stats.dot3StatsCarrierSenseErrors++;
                          if (d_status & (TULIP_DSTS_TxUNDERFLOW|TULIP_DSTS_TxBABBLE))
                              sc->tulip_dot3stats.dot3StatsInternalMacTransmitErrors++;
                          if (d_status & TULIP_DSTS_TxUNDERFLOW)
                              sc->tulip_dot3stats.dot3StatsInternalTransmitUnderflows++;
                          if (d_status & TULIP_DSTS_TxBABBLE)
                              sc->tulip_dot3stats.dot3StatsInternalTransmitBabbles++;
                      } else {
                          u_int32_t collisions = 
                              (d_status & TULIP_DSTS_TxCOLLMASK)
                                  >> TULIP_DSTS_V_TxCOLLCNT;
  
                          CTR2(KTR_TULIP,
                      "tulip_tx_intr: output ok, collisions %d, status %08x",
                              collisions, d_status);
                          sc->tulip_ifp->if_collisions += collisions;
                          if (collisions == 1)
                              sc->tulip_dot3stats.dot3StatsSingleCollisionFrames++;
                          else if (collisions > 1)
                              sc->tulip_dot3stats.dot3StatsMultipleCollisionFrames++;
                          else if (d_status & TULIP_DSTS_TxDEFERRED)
                              sc->tulip_dot3stats.dot3StatsDeferredTransmissions++;
                          /*
                           * SQE is only valid for 10baseT/BNC/AUI when not
                           * running in full-duplex.  In order to speed up the
                           * test, the corresponding bit in tulip_flags needs to
                           * set as well to get us to count SQE Test Errors.
                           */
                          if (d_status & TULIP_DSTS_TxNOHRTBT & sc->tulip_flags)
                              sc->tulip_dot3stats.dot3StatsSQETestErrors++;
                      }
                  }
              }
          }
  
          if (++ri->ri_nextin == ri->ri_last)
              ri->ri_nextin = ri->ri_first;
  
          if ((sc->tulip_flags & TULIP_TXPROBE_ACTIVE) == 0)
              sc->tulip_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
      }
      /*
       * If nothing left to transmit, disable the timer.
       * Else if progress, reset the timer back to 2 ticks.
       */
      if (ri->ri_free == ri->ri_max || (sc->tulip_flags & TULIP_TXPROBE_ACTIVE))
          sc->tulip_txtimer = 0;
      else if (xmits > 0)
          sc->tulip_txtimer = TULIP_TXTIMER;
      sc->tulip_ifp->if_opackets += xmits;
      TULIP_PERFEND(txintr);
      return descs;
  }
  
  static void
  tulip_print_abnormal_interrupt(tulip_softc_t * const sc, u_int32_t csr)
  {
      const char * const *msgp = tulip_status_bits;
      const char *sep;
      u_int32_t mask;
      const char thrsh[] = "72|128\0\0\0" "96|256\0\0\0" "128|512\0\0" "160|1024";
  
      TULIP_LOCK_ASSERT(sc);
      csr &= (1 << (sizeof(tulip_status_bits)/sizeof(tulip_status_bits[0]))) - 1;
      device_printf(sc->tulip_dev, "abnormal interrupt:");
      for (sep = " ", mask = 1; mask <= csr; mask <<= 1, msgp++) {
          if ((csr & mask) && *msgp != NULL) {
              printf("%s%s", sep, *msgp);
              if (mask == TULIP_STS_TXUNDERFLOW && (sc->tulip_flags & TULIP_NEWTXTHRESH)) {
                  sc->tulip_flags &= ~TULIP_NEWTXTHRESH;
                  if (sc->tulip_cmdmode & TULIP_CMD_STOREFWD) {
                      printf(" (switching to store-and-forward mode)");
                  } else {
                      printf(" (raising TX threshold to %s)",
                             &thrsh[9 * ((sc->tulip_cmdmode & TULIP_CMD_THRESHOLDCTL) >> 14)]);
                  }
              }
              sep = ", ";
          }
      }
      printf("\n");
  }
  
  static void
  tulip_intr_handler(tulip_softc_t * const sc)
  {
      TULIP_PERFSTART(intr)
      u_int32_t csr;
  
      CTR0(KTR_TULIP, "tulip_intr_handler invoked");
      TULIP_LOCK_ASSERT(sc);
      while ((csr = TULIP_CSR_READ(sc, csr_status)) & sc->tulip_intrmask) {
          TULIP_CSR_WRITE(sc, csr_status, csr);
  
          if (csr & TULIP_STS_SYSERROR) {
              sc->tulip_last_system_error = (csr & TULIP_STS_ERRORMASK) >> TULIP_STS_ERR_SHIFT;
              if (sc->tulip_flags & TULIP_NOMESSAGES) {
                  sc->tulip_flags |= TULIP_SYSTEMERROR;
              } else {
                  device_printf(sc->tulip_dev, "system error: %s\n",
                         tulip_system_errors[sc->tulip_last_system_error]);
              }
              sc->tulip_flags |= TULIP_NEEDRESET;
              sc->tulip_system_errors++;
              break;
          }
          if (csr & (TULIP_STS_LINKPASS|TULIP_STS_LINKFAIL) & sc->tulip_intrmask) {
  #if defined(TULIP_DEBUG)
              sc->tulip_dbg.dbg_link_intrs++;
  #endif
              if (sc->tulip_boardsw->bd_media_poll != NULL) {
                  (*sc->tulip_boardsw->bd_media_poll)(sc, csr & TULIP_STS_LINKFAIL
                                                      ? TULIP_MEDIAPOLL_LINKFAIL
                                                      : TULIP_MEDIAPOLL_LINKPASS);
                  csr &= ~TULIP_STS_ABNRMLINTR;
              }
              tulip_media_print(sc);
          }
          if (csr & (TULIP_STS_RXINTR|TULIP_STS_RXNOBUF)) {
              u_int32_t misses = TULIP_CSR_READ(sc, csr_missed_frames);
              if (csr & TULIP_STS_RXNOBUF)
                  sc->tulip_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->tulip_features & TULIP_HAVE_RXBADOVRFLW)) {
                  sc->tulip_dot3stats.dot3StatsInternalMacReceiveErrors++;
                  /*
                   * Stop the receiver process and spin until it's stopped.
                   * Tell rx_intr to drop the packets it dequeues.
                   */
                  TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode & ~TULIP_CMD_RXRUN);
                  while ((TULIP_CSR_READ(sc, csr_status) & TULIP_STS_RXSTOPPED) == 0)
                      ;
                  TULIP_CSR_WRITE(sc, csr_status, TULIP_STS_RXSTOPPED);
                  sc->tulip_flags |= TULIP_RXIGNORE;
              }
              tulip_rx_intr(sc);
              if (sc->tulip_flags & TULIP_RXIGNORE) {
                  /*
                   * Restart the receiver.
                   */
                  sc->tulip_flags &= ~TULIP_RXIGNORE;
                  TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode);
              }
          }
          if (csr & TULIP_STS_ABNRMLINTR) {
              u_int32_t tmp = csr & sc->tulip_intrmask
                  & ~(TULIP_STS_NORMALINTR|TULIP_STS_ABNRMLINTR);
              if (csr & TULIP_STS_TXUNDERFLOW) {
                  if ((sc->tulip_cmdmode & TULIP_CMD_THRESHOLDCTL) != TULIP_CMD_THRSHLD160) {
                      sc->tulip_cmdmode += TULIP_CMD_THRSHLD96;
                      sc->tulip_flags |= TULIP_NEWTXTHRESH;
                  } else if (sc->tulip_features & TULIP_HAVE_STOREFWD) {
                      sc->tulip_cmdmode |= TULIP_CMD_STOREFWD;
                      sc->tulip_flags |= TULIP_NEWTXTHRESH;
                  }
              }
              if (sc->tulip_flags & TULIP_NOMESSAGES) {
                  sc->tulip_statusbits |= tmp;
              } else {
                  tulip_print_abnormal_interrupt(sc, tmp);
                  sc->tulip_flags |= TULIP_NOMESSAGES;
              }
              TULIP_CSR_WRITE(sc, csr_command, sc->tulip_cmdmode);
          }
          if (sc->tulip_flags & (TULIP_WANTTXSTART|TULIP_TXPROBE_ACTIVE|TULIP_DOINGSETUP|TULIP_PROMISC)) {
              tulip_tx_intr(sc);
              if ((sc->tulip_flags & TULIP_TXPROBE_ACTIVE) == 0)
                  tulip_start_locked(sc);
          }
      }
      if (sc->tulip_flags & TULIP_NEEDRESET) {
          tulip_reset(sc);
          tulip_init_locked(sc);
      }
      TULIP_PERFEND(intr);
  }
  
  static void
  tulip_intr_shared(void *arg)
  {
      tulip_softc_t * sc = arg;
  
      for (; sc != NULL; sc = sc->tulip_slaves) {
          TULIP_LOCK(sc);
  #if defined(TULIP_DEBUG)
          sc->tulip_dbg.dbg_intrs++;
  #endif
          tulip_intr_handler(sc);
          TULIP_UNLOCK(sc);
      }
  }
  
  static void
  tulip_intr_normal(void *arg)
  {
      tulip_softc_t * sc = (tulip_softc_t *) arg;
  
      TULIP_LOCK(sc);
  #if defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_intrs++;
  #endif
      tulip_intr_handler(sc);
      TULIP_UNLOCK(sc);
  }
  
  static struct mbuf *
  tulip_txput(tulip_softc_t * const sc, struct mbuf *m)
  {
      TULIP_PERFSTART(txput)
      tulip_ringinfo_t * const ri = &sc->tulip_txinfo;
      tulip_descinfo_t *eop, *nextout;
      int segcnt, free;
      u_int32_t d_status;
      bus_dma_segment_t segs[TULIP_MAX_TXSEG];
      bus_dmamap_t *map;
      int error, nsegs;
      struct mbuf *m0;
  
      TULIP_LOCK_ASSERT(sc);
  #if defined(TULIP_DEBUG)
      if ((sc->tulip_cmdmode & TULIP_CMD_TXRUN) == 0) {
          device_printf(sc->tulip_dev, "txput%s: tx not running\n",
                 (sc->tulip_flags & TULIP_TXPROBE_ACTIVE) ? "(probe)" : "");
          sc->tulip_flags |= TULIP_WANTTXSTART;
          sc->tulip_dbg.dbg_txput_finishes[0]++;
          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 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.
       */
  #if defined(KTR) && KTR_TULIP
      segcnt = 1;
      m0 = m;
      while (m0->m_next != NULL) {
              segcnt++;
              m0 = m0->m_next;
      }
  #endif
      CTR2(KTR_TULIP, "tulip_txput: sending packet %p (%d chunks)", m, segcnt);
      d_status = 0;
      eop = nextout = ri->ri_nextout;
      segcnt = 0;
      free = ri->ri_free;
  
      /*
       * Reclaim some tx descriptors if we are out since we need at least one
       * free descriptor so that we have a dma_map to load the mbuf.
       */
      if (free == 0) {
  #if defined(TULIP_DEBUG)
          sc->tulip_dbg.dbg_no_txmaps++;
  #endif
          free += tulip_tx_intr(sc);
      }
      if (free == 0) {
          sc->tulip_flags |= TULIP_WANTTXSTART;
  #if defined(TULIP_DEBUG)
          sc->tulip_dbg.dbg_txput_finishes[1]++;
  #endif
          goto finish;
      }
      error = bus_dmamap_load_mbuf_sg(ri->ri_data_tag, *eop->di_map, m, segs,
          &nsegs, 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.  If
               * we can't recopy it, try again later.
               */
              m0 = m_defrag(m, M_DONTWAIT);
              if (m0 == NULL) {
                  sc->tulip_flags |= TULIP_WANTTXSTART;
  #if defined(TULIP_DEBUG)
                  sc->tulip_dbg.dbg_txput_finishes[2]++;
  #endif
                  goto finish;
              }
              m = m0;
              error = bus_dmamap_load_mbuf_sg(ri->ri_data_tag, *eop->di_map, m,
                  segs, &nsegs, BUS_DMA_NOWAIT);
          }
          if (error != 0) {
              device_printf(sc->tulip_dev,
                  "unable to load tx map, error = %d\n", error);
  #if defined(TULIP_DEBUG)
              sc->tulip_dbg.dbg_txput_finishes[3]++;
  #endif
              goto finish;
          }
      }
      CTR1(KTR_TULIP, "tulip_txput: nsegs %d", nsegs);
  
      /*
       * Each descriptor allows for up to 2 fragments since we don't use
       * the descriptor chaining mode in this driver.
       */
      if ((free -= (nsegs + 1) / 2) <= 0
              /*
               * See if there's any unclaimed space in the transmit ring.
               */
              && (free += tulip_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->tulip_flags |= TULIP_WANTTXSTART;
  #if defined(TULIP_DEBUG)
          sc->tulip_dbg.dbg_txput_finishes[4]++;
  #endif
          bus_dmamap_unload(ri->ri_data_tag, *eop->di_map);
          goto finish;
      }
      for (; nsegs - segcnt > 1; segcnt += 2) {
          eop = nextout;
          eop->di_desc->d_flag   &= TULIP_DFLAG_ENDRING|TULIP_DFLAG_CHAIN;
          eop->di_desc->d_status  = d_status;
          eop->di_desc->d_addr1   = segs[segcnt].ds_addr & 0xffffffff;
          eop->di_desc->d_length1 = segs[segcnt].ds_len;
          eop->di_desc->d_addr2   = segs[segcnt+1].ds_addr & 0xffffffff;
          eop->di_desc->d_length2 = segs[segcnt+1].ds_len;
          d_status = TULIP_DSTS_OWNER;
          if (++nextout == ri->ri_last)
              nextout = ri->ri_first;
      }
      if (segcnt < nsegs) {
          eop = nextout;
          eop->di_desc->d_flag   &= TULIP_DFLAG_ENDRING|TULIP_DFLAG_CHAIN;
          eop->di_desc->d_status  = d_status;
          eop->di_desc->d_addr1   = segs[segcnt].ds_addr & 0xffffffff;
          eop->di_desc->d_length1 = segs[segcnt].ds_len;
          eop->di_desc->d_addr2   = 0;
          eop->di_desc->d_length2 = 0;
          if (++nextout == ri->ri_last)
              nextout = ri->ri_first;
      }
  
      /*
       * tulip_tx_intr() harvests the mbuf from the last descriptor in the
       * frame.  We just used the dmamap in the first descriptor for the
       * load operation however.  Thus, to let the tulip_dequeue_mbuf() call
       * in tulip_tx_intr() unload the correct dmamap, we swap the dmamap
       * pointers in the two descriptors if this is a multiple-descriptor
       * packet.
       */
      if (eop != ri->ri_nextout) {
              map = eop->di_map;
              eop->di_map = ri->ri_nextout->di_map;
              ri->ri_nextout->di_map = map;
      }
  
      /*
       * bounce a copy to the bpf listener, if any.
       */
      if (!(sc->tulip_flags & TULIP_DEVICEPROBE))
              BPF_MTAP(sc->tulip_ifp, m);
  
      /*
       * The descriptors have been filled in.  Now get ready
       * to transmit.
       */
      CTR3(KTR_TULIP, "tulip_txput: enqueued mbuf %p to descriptors %td - %td",
          m, ri->ri_nextout - ri->ri_first, eop - ri->ri_first);
      KASSERT(eop->di_mbuf == NULL, ("clobbering earlier tx mbuf"));
      eop->di_mbuf = m;
      TULIP_TXMAP_PRESYNC(ri, ri->ri_nextout);
      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->di_desc->d_status = 0;
      TULIP_TXDESC_PRESYNC(ri);
  
      /*
       * Mark the last and first segments, indicate we want a transmit
       * complete interrupt, and tell it to transmit!
       */
      eop->di_desc->d_flag |= TULIP_DFLAG_TxLASTSEG|TULIP_DFLAG_TxWANTINTR;
  
      /*
       * 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.
       */
      ri->ri_nextout->di_desc->d_flag |= TULIP_DFLAG_TxFIRSTSEG;
      TULIP_TXDESC_PRESYNC(ri);
      ri->ri_nextout->di_desc->d_status = TULIP_DSTS_OWNER;
      TULIP_TXDESC_PRESYNC(ri);
  
      /*
       * This advances the ring for us.
       */
      ri->ri_nextout = nextout;
      ri->ri_free = free;
  
      TULIP_PERFEND(txput);
  
      if (sc->tulip_flags & TULIP_TXPROBE_ACTIVE) {
          TULIP_CSR_WRITE(sc, csr_txpoll, 1);
          sc->tulip_ifp->if_drv_flags |= IFF_DRV_OACTIVE;
          TULIP_PERFEND(txput);
          return NULL;
      }
  
      /*
       * switch back to the single queueing ifstart.
       */
      sc->tulip_flags &= ~TULIP_WANTTXSTART;
      if (sc->tulip_txtimer == 0)
          sc->tulip_txtimer = TULIP_TXTIMER;
  #if defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_txput_finishes[5]++;
  #endif
  
      /*
       * 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 defined(TULIP_DEBUG)
      sc->tulip_dbg.dbg_txput_finishes[6]++;
  #endif
      if (sc->tulip_flags & (TULIP_WANTTXSTART|TULIP_DOINGSETUP)) {
          sc->tulip_ifp->if_drv_flags |= IFF_DRV_OACTIVE;
          if ((sc->tulip_intrmask & TULIP_STS_TXINTR) == 0) {
              sc->tulip_intrmask |= TULIP_STS_TXINTR;
              TULIP_CSR_WRITE(sc, csr_intr, sc->tulip_intrmask);
          }
      } else if ((sc->tulip_flags & TULIP_PROMISC) == 0) {
          if (sc->tulip_intrmask & TULIP_STS_TXINTR) {
              sc->tulip_intrmask &= ~TULIP_STS_TXINTR;
              TULIP_CSR_WRITE(sc, csr_intr, sc->tulip_intrmask);
          }
      }
      TULIP_CSR_WRITE(sc, csr_txpoll, 1);
      TULIP_PERFEND(txput);
      return m;
  }
  
  static void
  tulip_txput_setup(tulip_softc_t * const sc)
  {
      tulip_ringinfo_t * const ri = &sc->tulip_txinfo;
      tulip_desc_t *nextout;
  
      TULIP_LOCK_ASSERT(sc);
  
      /*
       * We will transmit, at most, one setup packet per call to ifstart.
       */
  
  #if defined(TULIP_DEBUG)
      if ((sc->tulip_cmdmode & TULIP_CMD_TXRUN) == 0) {
          device_printf(sc->tulip_dev, "txput_setup: tx not running\n");
          sc->tulip_flags |= TULIP_WANTTXSTART;
          return;
      }
  #endif
      /*
       * Try to reclaim some free descriptors..
       */
      if (ri->ri_free < 2)
          tulip_tx_intr(sc);
      if ((sc->tulip_flags & TULIP_DOINGSETUP) || ri->ri_free == 1) {
          sc->tulip_flags |= TULIP_WANTTXSTART;
          return;
      }
      bcopy(sc->tulip_setupdata, sc->tulip_setupbuf,
            sizeof(sc->tulip_setupdata));
      /*
       * Clear WANTSETUP and set DOINGSETUP.  Since we know that WANTSETUP is
       * set and DOINGSETUP is clear doing an XOR of the two will DTRT.
       */
      sc->tulip_flags ^= TULIP_WANTSETUP|TULIP_DOINGSETUP;
      ri->ri_free--;
      nextout = ri->ri_nextout->di_desc;
      nextout->d_flag &= TULIP_DFLAG_ENDRING|TULIP_DFLAG_CHAIN;
      nextout->d_flag |= TULIP_DFLAG_TxFIRSTSEG|TULIP_DFLAG_TxLASTSEG
          |TULIP_DFLAG_TxSETUPPKT|TULIP_DFLAG_TxWANTINTR;
      if (sc->tulip_flags & TULIP_WANTHASHPERFECT)
          nextout->d_flag |= TULIP_DFLAG_TxHASHFILT;
      else if (sc->tulip_flags & TULIP_WANTHASHONLY)
          nextout->d_flag |= TULIP_DFLAG_TxHASHFILT|TULIP_DFLAG_TxINVRSFILT;
  
      nextout->d_length2 = 0;
      nextout->d_addr2 = 0;
      nextout->d_length1 = sizeof(sc->tulip_setupdata);
      nextout->d_addr1 = sc->tulip_setup_dma_addr & 0xffffffff;
      bus_dmamap_sync(sc->tulip_setup_tag, sc->tulip_setup_map,
          BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
      TULIP_TXDESC_PRESYNC(ri);
      CTR1(KTR_TULIP, "tulip_txput_setup: using descriptor %td",
          ri->ri_nextout - ri->ri_first);
  
      /*
       * Advance the ring for the next transmit packet.
       */
      if (++ri->ri_nextout == ri->ri_last)
          ri->ri_nextout = ri->ri_first;
  
      /*
       * Make sure the next descriptor is owned by us since it
       * may have been set up above if we ran out of room in the
       * ring.
       */
      ri->ri_nextout->di_desc->d_status = 0;
      TULIP_TXDESC_PRESYNC(ri);
      nextout->d_status = TULIP_DSTS_OWNER;
      /*
       * Flush the ownwership of the current descriptor
       */
      TULIP_TXDESC_PRESYNC(ri);
      TULIP_CSR_WRITE(sc, csr_txpoll, 1);
      if ((sc->tulip_intrmask & TULIP_STS_TXINTR) == 0) {
          sc->tulip_intrmask |= TULIP_STS_TXINTR;
          TULIP_CSR_WRITE(sc, csr_intr, sc->tulip_intrmask);
      }
  }
  
  static int
  tulip_ifioctl(struct ifnet * ifp, u_long cmd, caddr_t data)
  {
      TULIP_PERFSTART(ifioctl)
      tulip_softc_t * const sc = (tulip_softc_t *)ifp->if_softc;
      struct ifreq *ifr = (struct ifreq *) data;
      int error = 0;
  
      switch (cmd) {
          case SIOCSIFFLAGS: {
              TULIP_LOCK(sc);
              tulip_init_locked(sc);
              TULIP_UNLOCK(sc);
              break;
          }
  
          case SIOCSIFMEDIA:
          case SIOCGIFMEDIA: {
              error = ifmedia_ioctl(ifp, ifr, &sc->tulip_ifmedia, cmd);
              break;
          }
  
          case SIOCADDMULTI:
          case SIOCDELMULTI: {
              /*
               * Update multicast listeners
               */
              TULIP_LOCK(sc);
              tulip_init_locked(sc);
              TULIP_UNLOCK(sc);
              error = 0;
              break;
          }
  
  #ifdef SIOCGADDRROM
          case SIOCGADDRROM: {
              error = copyout(sc->tulip_rombuf, ifr->ifr_data, sizeof(sc->tulip_rombuf));
              break;
          }
  #endif
  #ifdef SIOCGCHIPID
          case SIOCGCHIPID: {
              ifr->ifr_metric = (int) sc->tulip_chipid;
              break;
          }
  #endif
          default: {
              error = ether_ioctl(ifp, cmd, data);
              break;
          }
      }
  
      TULIP_PERFEND(ifioctl);
      return error;
  }
  
  static void
  tulip_start(struct ifnet * const ifp)
  {
      TULIP_PERFSTART(ifstart)
      tulip_softc_t * const sc = (tulip_softc_t *)ifp->if_softc;
  
      TULIP_LOCK(sc);
      tulip_start_locked(sc);
      TULIP_UNLOCK(sc);
  
      TULIP_PERFEND(ifstart);
  }
  
  static void
  tulip_start_locked(tulip_softc_t * const sc)
  {
      struct mbuf *m;
  
      TULIP_LOCK_ASSERT(sc);
  
      CTR0(KTR_TULIP, "tulip_start_locked invoked");
      if ((sc->tulip_flags & (TULIP_WANTSETUP|TULIP_TXPROBE_ACTIVE)) == TULIP_WANTSETUP)
          tulip_txput_setup(sc);
  
      CTR1(KTR_TULIP, "tulip_start_locked: %d tx packets pending",
          sc->tulip_ifp->if_snd.ifq_len);
      while (!IFQ_DRV_IS_EMPTY(&sc->tulip_ifp->if_snd)) {
          IFQ_DRV_DEQUEUE(&sc->tulip_ifp->if_snd, m);
          if(m == NULL)
              break;
          if ((m = tulip_txput(sc, m)) != NULL) {
              IFQ_DRV_PREPEND(&sc->tulip_ifp->if_snd, m);
              break;
          }
      }
  }
  
  /*
   * Even though this routine runs at device spl, it does not break
   * our use of splnet (splsoftnet under NetBSD) for the majority
   * of this driver since 
   * if_watcbog is called from if_watchdog which is called from
   * splsoftclock which is below spl[soft]net.
   */
  static void
  tulip_ifwatchdog(struct ifnet *ifp)
  {
      TULIP_PERFSTART(ifwatchdog)
      tulip_softc_t * const sc = (tulip_softc_t *)ifp->if_softc;
  #if defined(TULIP_DEBUG)
      u_int32_t rxintrs;
  #endif
  
      TULIP_LOCK(sc);
  #if defined(TULIP_DEBUG)
      rxintrs = sc->tulip_dbg.dbg_rxintrs - sc->tulip_dbg.dbg_last_rxintrs;
      if (rxintrs > sc->tulip_dbg.dbg_high_rxintrs_hz)
          sc->tulip_dbg.dbg_high_rxintrs_hz = rxintrs;
      sc->tulip_dbg.dbg_last_rxintrs = sc->tulip_dbg.dbg_rxintrs;
  #endif /* TULIP_DEBUG */
  
      sc->tulip_ifp->if_timer = 1;
      /*
       * These should be rare so do a bulk test up front so we can just skip
       * them if needed.
       */
      if (sc->tulip_flags & (TULIP_SYSTEMERROR|TULIP_RXBUFSLOW|TULIP_NOMESSAGES)) {
          /*
           * If the number of receive buffer is low, try to refill
           */
          if (sc->tulip_flags & TULIP_RXBUFSLOW)
              tulip_rx_intr(sc);
  
          if (sc->tulip_flags & TULIP_SYSTEMERROR) {
              if_printf(sc->tulip_ifp, "%d system errors: last was %s\n",
                     sc->tulip_system_errors,
                     tulip_system_errors[sc->tulip_last_system_error]);
          }
          if (sc->tulip_statusbits) {
              tulip_print_abnormal_interrupt(sc, sc->tulip_statusbits);
              sc->tulip_statusbits = 0;
          }
  
          sc->tulip_flags &= ~(TULIP_NOMESSAGES|TULIP_SYSTEMERROR);
      }
  
      if (sc->tulip_txtimer)
          tulip_tx_intr(sc);
      if (sc->tulip_txtimer && --sc->tulip_txtimer == 0) {
          if_printf(sc->tulip_ifp, "transmission timeout\n");
          if (TULIP_DO_AUTOSENSE(sc)) {
              sc->tulip_media = TULIP_MEDIA_UNKNOWN;
              sc->tulip_probe_state = TULIP_PROBE_INACTIVE;
              sc->tulip_flags &= ~(TULIP_WANTRXACT|TULIP_LINKUP);
          }
          tulip_reset(sc);
          tulip_init_locked(sc);
      }
  
      TULIP_PERFEND(ifwatchdog);
      TULIP_PERFMERGE(sc, perf_intr_cycles);
      TULIP_PERFMERGE(sc, perf_ifstart_cycles);
      TULIP_PERFMERGE(sc, perf_ifioctl_cycles);
      TULIP_PERFMERGE(sc, perf_ifwatchdog_cycles);
      TULIP_PERFMERGE(sc, perf_timeout_cycles);
      TULIP_PERFMERGE(sc, perf_ifstart_one_cycles);
      TULIP_PERFMERGE(sc, perf_txput_cycles);
      TULIP_PERFMERGE(sc, perf_txintr_cycles);
      TULIP_PERFMERGE(sc, perf_rxintr_cycles);
      TULIP_PERFMERGE(sc, perf_rxget_cycles);
      TULIP_PERFMERGE(sc, perf_intr);
      TULIP_PERFMERGE(sc, perf_ifstart);
      TULIP_PERFMERGE(sc, perf_ifioctl);
      TULIP_PERFMERGE(sc, perf_ifwatchdog);
      TULIP_PERFMERGE(sc, perf_timeout);
      TULIP_PERFMERGE(sc, perf_ifstart_one);
      TULIP_PERFMERGE(sc, perf_txput);
      TULIP_PERFMERGE(sc, perf_txintr);
      TULIP_PERFMERGE(sc, perf_rxintr);
      TULIP_PERFMERGE(sc, perf_rxget);
      TULIP_UNLOCK(sc);
  }
  
  static void
  tulip_attach(tulip_softc_t * const sc)
  {
      struct ifnet *ifp;
  
      ifp = sc->tulip_ifp = if_alloc(IFT_ETHER);
  
      /* XXX: driver name/unit should be set some other way */
      if_initname(ifp, "de", sc->tulip_unit);
      ifp->if_softc = sc;
      ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST;
      ifp->if_ioctl = tulip_ifioctl;
      ifp->if_start = tulip_start;
      ifp->if_watchdog = tulip_ifwatchdog;
      ifp->if_timer = 1;
      ifp->if_init = tulip_init;
      IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
      ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
      IFQ_SET_READY(&ifp->if_snd);
    
      device_printf(sc->tulip_dev, "%s%s pass %d.%d%s\n",
             sc->tulip_boardid,
             tulip_chipdescs[sc->tulip_chipid],
             (sc->tulip_revinfo & 0xF0) >> 4,
             sc->tulip_revinfo & 0x0F,
             (sc->tulip_features & (TULIP_HAVE_ISVSROM|TULIP_HAVE_OKSROM))
                   == TULIP_HAVE_ISVSROM ? " (invalid EESPROM checksum)" : "");
  
      TULIP_LOCK(sc);
      (*sc->tulip_boardsw->bd_media_probe)(sc);
      ifmedia_init(&sc->tulip_ifmedia, 0,
                   tulip_ifmedia_change,
                   tulip_ifmedia_status);
      tulip_ifmedia_add(sc);
  
      tulip_reset(sc);
      TULIP_UNLOCK(sc);
  
      ether_ifattach(sc->tulip_ifp, sc->tulip_enaddr);
  
      TULIP_LOCK(sc);
      sc->tulip_flags &= ~TULIP_DEVICEPROBE;
      TULIP_UNLOCK(sc);
  }
  
  /* Release memory for a single descriptor ring. */
  static void
  tulip_busdma_freering(tulip_ringinfo_t *ri)
  {
      int i;
  
      /* Release the DMA maps and tag for data buffers. */
      if (ri->ri_data_maps != NULL) {
          for (i = 0; i < ri->ri_max; i++) {
              if (ri->ri_data_maps[i] != NULL) {
                  bus_dmamap_destroy(ri->ri_data_tag, ri->ri_data_maps[i]);
                  ri->ri_data_maps[i] = NULL;
              }
          }
          free(ri->ri_data_maps, M_DEVBUF);
          ri->ri_data_maps = NULL;
      }
      if (ri->ri_data_tag != NULL) {
          bus_dma_tag_destroy(ri->ri_data_tag);
          ri->ri_data_tag = NULL;
      }
  
      /* Release the DMA memory and tag for the ring descriptors. */
      if (ri->ri_dma_addr != 0) {
          bus_dmamap_unload(ri->ri_ring_tag, ri->ri_ring_map);
          ri->ri_dma_addr = 0;
      }
      if (ri->ri_descs != NULL) {
          bus_dmamem_free(ri->ri_ring_tag, ri->ri_descs, ri->ri_ring_map);
          ri->ri_ring_map = NULL;
          ri->ri_descs = NULL;
      }
      if (ri->ri_ring_tag != NULL) {
          bus_dma_tag_destroy(ri->ri_ring_tag);
          ri->ri_ring_tag = NULL;
      }
  }
  
  /* Allocate memory for a single descriptor ring. */
  static int
  tulip_busdma_allocring(device_t dev, tulip_softc_t * const sc, size_t count,
      bus_size_t align, int nsegs, tulip_ringinfo_t *ri, const char *name)
  {
      size_t size;
      int error, i;
  
      /* First, setup a tag. */
      ri->ri_max = count;
      size = count * sizeof(tulip_desc_t);
      error = bus_dma_tag_create(bus_get_dma_tag(dev),
          32, 0, BUS_SPACE_MAXADDR_32BIT,
          BUS_SPACE_MAXADDR, NULL, NULL, size, 1, size, 0, NULL, NULL,
          &ri->ri_ring_tag);
      if (error) {
          device_printf(dev, "failed to allocate %s descriptor ring dma tag\n",
              name);
          return (error);
      }
  
      /* Next, allocate memory for the descriptors. */
      error = bus_dmamem_alloc(ri->ri_ring_tag, (void **)&ri->ri_descs,
          BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ri->ri_ring_map);
      if (error) {
          device_printf(dev, "failed to allocate memory for %s descriptor ring\n",
              name);
          return (error);
      }
  
      /* Map the descriptors. */
      error = bus_dmamap_load(ri->ri_ring_tag, ri->ri_ring_map, ri->ri_descs,
          size, tulip_dma_map_addr, &ri->ri_dma_addr, BUS_DMA_NOWAIT);
      if (error) {
          device_printf(dev, "failed to get dma address for %s descriptor ring\n",
              name);
          return (error);
      }
  
      /* Allocate a tag for the data buffers. */
      error = bus_dma_tag_create(bus_get_dma_tag(dev), align, 0,
          BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
          MCLBYTES * nsegs, nsegs, MCLBYTES, 0, NULL, NULL, &ri->ri_data_tag);
      if (error) {
          device_printf(dev, "failed to allocate %s buffer dma tag\n", name);
          return (error);
      }
  
      /* Allocate maps for the data buffers. */
      ri->ri_data_maps = malloc(sizeof(bus_dmamap_t) * count, M_DEVBUF,
          M_WAITOK | M_ZERO);
      for (i = 0; i < count; i++) {
          error = bus_dmamap_create(ri->ri_data_tag, 0, &ri->ri_data_maps[i]);
          if (error) {
              device_printf(dev, "failed to create map for %s buffer %d\n",
                  name, i);
              return (error);
          }
      }
  
      return (0);
  }
  
  /* Release busdma maps, tags, and memory. */
  static void
  tulip_busdma_cleanup(tulip_softc_t * const sc)
  {
  
      /* Release resources for the setup descriptor. */
      if (sc->tulip_setup_dma_addr != 0) {
          bus_dmamap_unload(sc->tulip_setup_tag, sc->tulip_setup_map);
          sc->tulip_setup_dma_addr = 0;
      }
      if (sc->tulip_setupbuf != NULL) {
          bus_dmamem_free(sc->tulip_setup_tag, sc->tulip_setupbuf,
              sc->tulip_setup_map);
          bus_dmamap_destroy(sc->tulip_setup_tag, sc->tulip_setup_map);
          sc->tulip_setup_map = NULL;
          sc->tulip_setupbuf = NULL;
      }
      if (sc->tulip_setup_tag != NULL) {
          bus_dma_tag_destroy(sc->tulip_setup_tag);
          sc->tulip_setup_tag = NULL;
      }
  
      /* Release the transmit ring. */
      tulip_busdma_freering(&sc->tulip_txinfo);
  
      /* Release the receive ring. */
      tulip_busdma_freering(&sc->tulip_rxinfo);
  }
  
  static int
  tulip_busdma_init(device_t dev, tulip_softc_t * const sc)
  {
      int error;
  
      /*
       * Allocate space and dmamap for transmit ring.
       */
      error = tulip_busdma_allocring(dev, sc, TULIP_TXDESCS, 1, TULIP_MAX_TXSEG,
          &sc->tulip_txinfo, "transmit");
      if (error)
          return (error);
  
      /*
       * Allocate space and dmamap for receive ring.  We tell bus_dma that
       * we can map MCLBYTES so that it will accept a full MCLBYTES cluster,
       * but we will only map the first TULIP_RX_BUFLEN bytes.  This is not
       * a waste in practice though as an ethernet frame can easily fit
       * in TULIP_RX_BUFLEN bytes.
       */
      error = tulip_busdma_allocring(dev, sc, TULIP_RXDESCS, 4, 1,
          &sc->tulip_rxinfo, "receive");
      if (error)
          return (error);
  
      /*
       * Allocate a DMA tag, memory, and map for setup descriptor
       */
      error = bus_dma_tag_create(bus_get_dma_tag(dev), 32, 0,
          BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
          sizeof(sc->tulip_setupdata), 1, sizeof(sc->tulip_setupdata), 0,
          NULL, NULL, &sc->tulip_setup_tag);
      if (error) {
          device_printf(dev, "failed to allocate setup descriptor dma tag\n");
          return (error);
      }
      error = bus_dmamem_alloc(sc->tulip_setup_tag, (void **)&sc->tulip_setupbuf,
          BUS_DMA_NOWAIT | BUS_DMA_ZERO, &sc->tulip_setup_map);
      if (error) {
          device_printf(dev, "failed to allocate memory for setup descriptor\n");
          return (error);
      }
      error = bus_dmamap_load(sc->tulip_setup_tag, sc->tulip_setup_map,
          sc->tulip_setupbuf, sizeof(sc->tulip_setupdata), 
          tulip_dma_map_addr, &sc->tulip_setup_dma_addr, BUS_DMA_NOWAIT);
      if (error) {
          device_printf(dev, "failed to get dma address for setup descriptor\n");
          return (error);
      }
  
      return error;
  }
  
  static void
  tulip_initcsrs(tulip_softc_t * const sc, tulip_csrptr_t csr_base,
      size_t csr_size)
  {
      sc->tulip_csrs.csr_busmode          = csr_base +  0 * csr_size;
      sc->tulip_csrs.csr_txpoll           = csr_base +  1 * csr_size;
      sc->tulip_csrs.csr_rxpoll           = csr_base +  2 * csr_size;
      sc->tulip_csrs.csr_rxlist           = csr_base +  3 * csr_size;
      sc->tulip_csrs.csr_txlist           = csr_base +  4 * csr_size;
      sc->tulip_csrs.csr_status           = csr_base +  5 * csr_size;
      sc->tulip_csrs.csr_command          = csr_base +  6 * csr_size;
      sc->tulip_csrs.csr_intr             = csr_base +  7 * csr_size;
      sc->tulip_csrs.csr_missed_frames    = csr_base +  8 * csr_size;
      sc->tulip_csrs.csr_9                = csr_base +  9 * csr_size;
      sc->tulip_csrs.csr_10               = csr_base + 10 * csr_size;
      sc->tulip_csrs.csr_11               = csr_base + 11 * csr_size;
      sc->tulip_csrs.csr_12               = csr_base + 12 * csr_size;
      sc->tulip_csrs.csr_13               = csr_base + 13 * csr_size;
      sc->tulip_csrs.csr_14               = csr_base + 14 * csr_size;
      sc->tulip_csrs.csr_15               = csr_base + 15 * csr_size;
  }
  
  static int
  tulip_initring(
      device_t dev,
      tulip_softc_t * const sc,
      tulip_ringinfo_t * const ri,
      int ndescs)
  {
      int i;
  
      ri->ri_descinfo = malloc(sizeof(tulip_descinfo_t) * ndescs, M_DEVBUF,
          M_WAITOK | M_ZERO);
      for (i = 0; i < ndescs; i++) {
          ri->ri_descinfo[i].di_desc = &ri->ri_descs[i];
          ri->ri_descinfo[i].di_map = &ri->ri_data_maps[i];
      }
      ri->ri_first = ri->ri_descinfo;
      ri->ri_max = ndescs;
      ri->ri_last = ri->ri_first + ri->ri_max;
      bzero(ri->ri_descs, sizeof(tulip_desc_t) * ri->ri_max);
      ri->ri_last[-1].di_desc->d_flag = TULIP_DFLAG_ENDRING;
      return (0);
  }
  
  /*
   * This is the PCI configuration support.
   */
  
  #define PCI_CBIO        PCIR_BAR(0)     /* Configuration Base IO Address */
  #define PCI_CBMA        PCIR_BAR(1)     /* Configuration Base Memory Address */
  #define PCI_CFDA        0x40    /* Configuration Driver Area */
  
  static int
  tulip_pci_probe(device_t dev)
  {
      const char *name = NULL;
  
      if (pci_get_vendor(dev) != DEC_VENDORID)
          return ENXIO;
  
      /*
       * Some LanMedia WAN cards use the Tulip chip, but they have
       * their own driver, and we should not recognize them
       */
      if (pci_get_subvendor(dev) == 0x1376)
          return ENXIO;
  
      switch (pci_get_device(dev)) {
      case CHIPID_21040:
          name = "Digital 21040 Ethernet";
          break;
      case CHIPID_21041:
          name = "Digital 21041 Ethernet";
          break;
      case CHIPID_21140:
          if (pci_get_revid(dev) >= 0x20)
              name = "Digital 21140A Fast Ethernet";
          else
              name = "Digital 21140 Fast Ethernet";
          break;
      case CHIPID_21142:
          if (pci_get_revid(dev) >= 0x20)
              name = "Digital 21143 Fast Ethernet";
          else
              name = "Digital 21142 Fast Ethernet";
          break;
      }
      if (name) {
          device_set_desc(dev, name);
          return BUS_PROBE_LOW_PRIORITY;
      }
      return ENXIO;
  }
  
  static int
  tulip_shutdown(device_t dev)
  {
      tulip_softc_t * const sc = device_get_softc(dev);
      TULIP_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
      DELAY(10);  /* Wait 10 microseconds (actually 50 PCI cycles but at 
                     33MHz that comes to two microseconds but wait a
                     bit longer anyways) */
      return 0;
  }
  
  static int
  tulip_pci_attach(device_t dev)
  {
      tulip_softc_t *sc;
      int retval, idx;
      u_int32_t revinfo, cfdainfo;
      unsigned csroffset = TULIP_PCI_CSROFFSET;
      unsigned csrsize = TULIP_PCI_CSRSIZE;
      tulip_csrptr_t csr_base;
      tulip_chipid_t chipid = TULIP_CHIPID_UNKNOWN;
      struct resource *res;
      int rid, unit;
  
      unit = device_get_unit(dev);
  
      if (unit >= TULIP_MAX_DEVICES) {
          device_printf(dev, "not configured; limit of %d reached or exceeded\n",
                 TULIP_MAX_DEVICES);
          return ENXIO;
      }
  
      revinfo  = pci_get_revid(dev);
      cfdainfo = pci_read_config(dev, PCI_CFDA, 4);
  
      /* turn busmaster on in case BIOS doesn't set it */
      pci_enable_busmaster(dev);
  
      if (pci_get_vendor(dev) == DEC_VENDORID) {
          if (pci_get_device(dev) == CHIPID_21040)
                  chipid = TULIP_21040;
          else if (pci_get_device(dev) == CHIPID_21041)
                  chipid = TULIP_21041;
          else if (pci_get_device(dev) == CHIPID_21140)
                  chipid = (revinfo >= 0x20) ? TULIP_21140A : TULIP_21140;
          else if (pci_get_device(dev) == CHIPID_21142)
                  chipid = (revinfo >= 0x20) ? TULIP_21143 : TULIP_21142;
      }
      if (chipid == TULIP_CHIPID_UNKNOWN)
          return ENXIO;
  
      if (chipid == TULIP_21040 && revinfo < 0x20) {
          device_printf(dev,
              "not configured; 21040 pass 2.0 required (%d.%d found)\n",
              revinfo >> 4, revinfo & 0x0f);
          return ENXIO;
      } else if (chipid == TULIP_21140 && revinfo < 0x11) {
          device_printf(dev,
              "not configured; 21140 pass 1.1 required (%d.%d found)\n",
              revinfo >> 4, revinfo & 0x0f);
          return ENXIO;
      }
  
      sc = device_get_softc(dev);
      sc->tulip_dev = dev;
      sc->tulip_pci_busno = pci_get_bus(dev);
      sc->tulip_pci_devno = pci_get_slot(dev);
      sc->tulip_chipid = chipid;
      sc->tulip_flags |= TULIP_DEVICEPROBE;
      if (chipid == TULIP_21140 || chipid == TULIP_21140A)
          sc->tulip_features |= TULIP_HAVE_GPR|TULIP_HAVE_STOREFWD;
      if (chipid == TULIP_21140A && revinfo <= 0x22)
          sc->tulip_features |= TULIP_HAVE_RXBADOVRFLW;
      if (chipid == TULIP_21140)
          sc->tulip_features |= TULIP_HAVE_BROKEN_HASH;
      if (chipid != TULIP_21040 && chipid != TULIP_21140)
          sc->tulip_features |= TULIP_HAVE_POWERMGMT;
      if (chipid == TULIP_21041 || chipid == TULIP_21142 || chipid == TULIP_21143) {
          sc->tulip_features |= TULIP_HAVE_DUALSENSE;
          if (chipid != TULIP_21041 || revinfo >= 0x20)
              sc->tulip_features |= TULIP_HAVE_SIANWAY;
          if (chipid != TULIP_21041)
              sc->tulip_features |= TULIP_HAVE_SIAGP|TULIP_HAVE_RXBADOVRFLW|TULIP_HAVE_STOREFWD;
          if (chipid != TULIP_21041 && revinfo >= 0x20)
              sc->tulip_features |= TULIP_HAVE_SIA100;
      }
  
      if (sc->tulip_features & TULIP_HAVE_POWERMGMT
              && (cfdainfo & (TULIP_CFDA_SLEEP|TULIP_CFDA_SNOOZE))) {
          cfdainfo &= ~(TULIP_CFDA_SLEEP|TULIP_CFDA_SNOOZE);
          pci_write_config(dev, PCI_CFDA, cfdainfo, 4);
          DELAY(11*1000);
      }
  
      sc->tulip_unit = unit;
      sc->tulip_revinfo = revinfo;
  #if defined(TULIP_IOMAPPED)
      rid = PCI_CBIO;
      res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
  #else
      rid = PCI_CBMA;
      res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  #endif
      if (!res)
          return ENXIO;
      sc->tulip_csrs_bst = rman_get_bustag(res);
      sc->tulip_csrs_bsh = rman_get_bushandle(res);
      csr_base = 0;
  
      mtx_init(TULIP_MUTEX(sc), MTX_NETWORK_LOCK, device_get_nameunit(dev),
          MTX_DEF);
      callout_init_mtx(&sc->tulip_callout, TULIP_MUTEX(sc), 0);
      tulips[unit] = sc;
  
      tulip_initcsrs(sc, csr_base + csroffset, csrsize);
  
      if ((retval = tulip_busdma_init(dev, sc)) != 0) {
          device_printf(dev, "error initing bus_dma: %d\n", retval);
          tulip_busdma_cleanup(sc);
          mtx_destroy(TULIP_MUTEX(sc));
          return ENXIO;
      }
  
      retval = tulip_initring(dev, sc, &sc->tulip_rxinfo, TULIP_RXDESCS);
      if (retval == 0)
          retval = tulip_initring(dev, sc, &sc->tulip_txinfo, TULIP_TXDESCS);
      if (retval) {
          tulip_busdma_cleanup(sc);
          mtx_destroy(TULIP_MUTEX(sc));
          return retval;
      }
  
      /*
       * Make sure there won't be any interrupts or such...
       */
      TULIP_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
      DELAY(100); /* Wait 10 microseconds (actually 50 PCI cycles but at 
                     33MHz that comes to two microseconds but wait a
                     bit longer anyways) */
  
      TULIP_LOCK(sc);
      retval = tulip_read_macaddr(sc);
      TULIP_UNLOCK(sc);
      if (retval < 0) {
          device_printf(dev, "can't read ENET ROM (why=%d) (", retval);
          for (idx = 0; idx < 32; idx++)
              printf("%02x", sc->tulip_rombuf[idx]);
          printf("\n");
          device_printf(dev, "%s%s pass %d.%d\n",
                 sc->tulip_boardid, tulip_chipdescs[sc->tulip_chipid],
                 (sc->tulip_revinfo & 0xF0) >> 4, sc->tulip_revinfo & 0x0F);
          device_printf(dev, "address unknown\n");
      } else {
          void (*intr_rtn)(void *) = tulip_intr_normal;
  
          if (sc->tulip_features & TULIP_HAVE_SHAREDINTR)
              intr_rtn = tulip_intr_shared;
  
          tulip_attach(sc);
  
          /* Setup interrupt last. */
          if ((sc->tulip_features & TULIP_HAVE_SLAVEDINTR) == 0) {
              void *ih;
  
              rid = 0;
              res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
                                           RF_SHAREABLE | RF_ACTIVE);
              if (res == 0 || bus_setup_intr(dev, res, INTR_TYPE_NET |
                      INTR_MPSAFE, NULL, intr_rtn, sc, &ih)) {
                  device_printf(dev, "couldn't map interrupt\n");
                  tulip_busdma_cleanup(sc);
                  ether_ifdetach(sc->tulip_ifp);
                  if_free(sc->tulip_ifp);
                  mtx_destroy(TULIP_MUTEX(sc));
                  return ENXIO;
              }
          }
      }
      return 0;
  }
  
  static device_method_t tulip_pci_methods[] = {
      /* Device interface */
      DEVMETHOD(device_probe,     tulip_pci_probe),
      DEVMETHOD(device_attach,    tulip_pci_attach),
      DEVMETHOD(device_shutdown,  tulip_shutdown),
      { 0, 0 }
  };
  
  static driver_t tulip_pci_driver = {
      "de",
      tulip_pci_methods,
      sizeof(tulip_softc_t),
  };
  
  static devclass_t tulip_devclass;
  
  DRIVER_MODULE(de, pci, tulip_pci_driver, tulip_devclass, 0, 0);
  
  #ifdef DDB
  void    tulip_dumpring(int unit, int ring);
  void    tulip_dumpdesc(int unit, int ring, int desc);
  void    tulip_status(int unit);
  
  void
  tulip_dumpring(int unit, int ring)
  {
      tulip_softc_t *sc;
      tulip_ringinfo_t *ri;
      tulip_descinfo_t *di;
  
      if (unit < 0 || unit >= TULIP_MAX_DEVICES) {
          db_printf("invalid unit %d\n", unit);
          return;
      }
      sc = tulips[unit];
      if (sc == NULL) {
          db_printf("unit %d not present\n", unit);
          return;
      }
  
      switch (ring) {
      case 0:
          db_printf("receive ring:\n");
          ri = &sc->tulip_rxinfo;
          break;
      case 1:
          db_printf("transmit ring:\n");
          ri = &sc->tulip_txinfo;
          break;
      default:
          db_printf("invalid ring %d\n", ring);
          return;
      }
  
      db_printf(" nextin: %td, nextout: %td, max: %d, free: %d\n",
          ri->ri_nextin - ri->ri_first, ri->ri_nextout - ri->ri_first,
          ri->ri_max, ri->ri_free);
      for (di = ri->ri_first; di != ri->ri_last; di++) {
          if (di->di_mbuf != NULL)
              db_printf(" descriptor %td: mbuf %p\n", di - ri->ri_first,
                  di->di_mbuf);
          else if (di->di_desc->d_flag & TULIP_DFLAG_TxSETUPPKT)
              db_printf(" descriptor %td: setup packet\n", di - ri->ri_first);
      }
  }
  
  void
  tulip_dumpdesc(int unit, int ring, int desc)
  {
      tulip_softc_t *sc;
      tulip_ringinfo_t *ri;
      tulip_descinfo_t *di;
      char *s;
  
      if (unit < 0 || unit >= TULIP_MAX_DEVICES) {
          db_printf("invalid unit %d\n", unit);
          return;
      }
      sc = tulips[unit];
      if (sc == NULL) {
          db_printf("unit %d not present\n", unit);
          return;
      }
  
      switch (ring) {
      case 0:
          s = "receive";
          ri = &sc->tulip_rxinfo;
          break;
      case 1:
          s = "transmit";
          ri = &sc->tulip_txinfo;
          break;
      default:
          db_printf("invalid ring %d\n", ring);
          return;
      }
  
      if (desc < 0 || desc >= ri->ri_max) {
          db_printf("invalid descriptor %d\n", desc);
          return;
      }
  
      db_printf("%s descriptor %d:\n", s, desc);
      di = &ri->ri_first[desc];
      db_printf(" mbuf: %p\n", di->di_mbuf);
      db_printf(" status: %08x  flag: %03x\n", di->di_desc->d_status,
          di->di_desc->d_flag);
      db_printf("  addr1: %08x  len1: %03x\n", di->di_desc->d_addr1,
          di->di_desc->d_length1);
      db_printf("  addr2: %08x  len2: %03x\n", di->di_desc->d_addr2,
          di->di_desc->d_length2);
  }
  #endif