Moved most of the DMA functions to a chipset driver so that

'hme' and 'be' can share the same logic.

1 files changed, 68 insertions, 344 deletions

diff --git a/sys/arch/sparc/dev/hme.c b/sys/arch/sparc/dev/hme.c
index a34c6386e3e..06583bf08e1 100644
--- a/sys/arch/sparc/dev/hme.c
+++ b/sys/arch/sparc/dev/hme.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hme.c,v 1.3 1998/07/13 02:27:41 jason Exp $	*/
+/*	$OpenBSD: hme.c,v 1.4 1998/07/17 21:33:07 jason Exp $	*/
 
 /*
  * Copyright (c) 1998 Jason L. Wright (jason@thought.net)
@@ -72,6 +72,7 @@
 #include <sparc/sparc/cpuvar.h>
 #include <sparc/dev/sbusvar.h>
 #include <sparc/dev/dmareg.h>	/* for SBUS_BURST_* */
+#include <sparc/dev/stp2002var.h>
 #include <sparc/dev/hmereg.h>
 #include <sparc/dev/hmevar.h>
 
@@ -80,42 +81,36 @@ void	hmeattach	__P((struct device *, struct device *, void *));
 void	hmewatchdog	__P((struct ifnet *));
 int	hmeintr		__P((void *));
 int	hmeioctl	__P((struct ifnet *, u_long, caddr_t));
-void	hmereset	__P((struct hme_softc *sc));
+void	hmereset	__P((struct hme_softc *));
 void	hmestart	__P((struct ifnet *));
-void	hmestop		__P((struct hme_softc *sc));
-void	hmeinit		__P((struct hme_softc *sc));
+void	hmestop		__P((struct hme_softc *));
+void	hmeinit		__P((struct hme_softc *));
 
-static void	hme_tcvr_write	    __P((struct hme_softc *sc, int reg,
+static void	hme_tcvr_write	    __P((struct hme_softc *, int reg,
 					u_short val));
-static int	hme_tcvr_read	    __P((struct hme_softc *sc, int reg));
-static void	hme_tcvr_bb_write   __P((struct hme_softc *sc, int reg,
+static int	hme_tcvr_read	    __P((struct hme_softc *, int reg));
+static void	hme_tcvr_bb_write   __P((struct hme_softc *, int reg,
 					u_short val));
-static int	hme_tcvr_bb_read    __P((struct hme_softc *sc, int reg));
-static void	hme_tcvr_bb_writeb  __P((struct hme_softc *sc, int b));
-static int	hme_tcvr_bb_readb   __P((struct hme_softc *sc));
-static void	hme_tcvr_check	    __P((struct hme_softc *sc));
-static int	hme_tcvr_reset	    __P((struct hme_softc *sc));
+static int	hme_tcvr_bb_read    __P((struct hme_softc *, int reg));
+static void	hme_tcvr_bb_writeb  __P((struct hme_softc *, int b));
+static int	hme_tcvr_bb_readb   __P((struct hme_softc *));
+static void	hme_tcvr_check	    __P((struct hme_softc *));
+static int	hme_tcvr_reset	    __P((struct hme_softc *));
 
 static void	hme_poll_stop	__P((struct hme_softc *sc));
 
 static int	hme_mint	__P((struct hme_softc *, u_int32_t));
-static int	hme_tint	__P((struct hme_softc *, u_int32_t));
-static int	hme_rint	__P((struct hme_softc *, u_int32_t));
 static int	hme_eint	__P((struct hme_softc *, u_int32_t));
 
-static void	hme_auto_negotiate __P((struct hme_softc *sc));
-static void	hme_manual_negotiate __P((struct hme_softc *sc));
-static void	hme_negotiate_watchdog __P((void *arg));
-static void	hme_print_link_mode __P((struct hme_softc *sc));
-static void	hme_set_initial_advertisement	__P((struct hme_softc *sc));
+static void	hme_auto_negotiate __P((struct hme_softc *));
+static void	hme_manual_negotiate __P((struct hme_softc *));
+static void	hme_negotiate_watchdog __P((void *));
+static void	hme_print_link_mode __P((struct hme_softc *));
+static void	hme_set_initial_advertisement	__P((struct hme_softc *));
 
-static void	hme_reset_rx __P((struct hme_softc *sc));
-static void	hme_reset_tx __P((struct hme_softc *sc));
-static void	hme_meminit __P((struct hme_softc *sc));
-
-static int	hme_put __P((struct hme_softc *sc, int idx, struct mbuf *m));
-static struct mbuf *hme_get __P((struct hme_softc *sc, int idx, int len));
-static void	hme_read __P((struct hme_softc *sc, int idx, int len));
+static void	hme_reset_rx		__P((struct hme_softc *));
+static void	hme_reset_tx		__P((struct hme_softc *));
+static void	hme_tx_dmawakeup	__P((void *v));
 
 static void hme_mcreset __P((struct hme_softc *));
 
@@ -150,7 +145,7 @@ hmeattach(parent, self, aux)
 {
 	struct confargs *ca = aux;
 	struct hme_softc *sc = (struct hme_softc *)self;
-	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
+	struct ifnet *ifp = &sc->sc_stp.stp_arpcom.ac_if;
 	int pri;
 	/* XXX the following declaration should be elsewhere */
 	extern void myetheraddr __P((u_char *));
@@ -189,11 +184,8 @@ hmeattach(parent, self, aux)
 
 	sc->sc_burst = ((struct sbus_softc *)parent)->sc_burst;
 
-	sc->sc_desc_dva = (struct hme_desc *) dvma_malloc(
-		sizeof(struct hme_desc), &(sc->sc_desc), M_NOWAIT);
-	sc->sc_bufs_dva = (struct hme_bufs *) dvma_malloc(
-		sizeof(struct hme_bufs) + RX_ALIGN_SIZE, &(sc->sc_bufs),
-		M_NOWAIT); /* XXX must be aligned on 64 byte boundary */
+	sc->sc_stp.stp_tx_dmawakeup = hme_tx_dmawakeup;
+	stp2002_meminit(&sc->sc_stp);
 
 	hme_set_initial_advertisement(sc);
 
@@ -208,8 +200,8 @@ hmeattach(parent, self, aux)
 	 * Otherwise, use the machine's builtin MAC.
 	 */
 	if (getprop(ca->ca_ra.ra_node, "local-mac-address",
-			sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN) <= 0) {
-		myetheraddr(sc->sc_arpcom.ac_enaddr);
+			sc->sc_stp.stp_arpcom.ac_enaddr, ETHER_ADDR_LEN) <= 0) {
+		myetheraddr(sc->sc_stp.stp_arpcom.ac_enaddr);
 	}
 
 	bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
@@ -228,7 +220,7 @@ hmeattach(parent, self, aux)
 	sc->sc_an_ticks = 0;
 
 	printf(" pri %d: address %s rev %d\n", pri,
-		ether_sprintf(sc->sc_arpcom.ac_enaddr), sc->sc_rev);
+		ether_sprintf(sc->sc_stp.stp_arpcom.ac_enaddr), sc->sc_rev);
 
 #if NBPFILTER > 0
 	bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
@@ -248,55 +240,18 @@ void
 hmestart(ifp)
 	struct ifnet *ifp;
 {
-	struct hme_softc *sc = ifp->if_softc;
-	struct mbuf *m;
-	int bix, len;
-
-	if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
-		return;
+	struct hme_softc *sc = (struct hme_softc *)ifp->if_softc;
 
-	bix = sc->sc_last_td;
-
-	for (;;) {
-		IF_DEQUEUE(&ifp->if_snd, m);
-		if (m == 0)
-			break;
-#if NBPFILTER > 0
-		/*
-		 * If BPF is listening on this interface, let it see the
-		 * packet before we commit it to the wire.
-		 */
-		if (ifp->if_bpf)
-			bpf_mtap(ifp->if_bpf, m);
-#endif
-
-		/*
-		 * Copy the mbuf chain into the transmit buffer.
-		 */
-		len = hme_put(sc, bix, m);
-
-		/*
-		 * Initialize transmit registers and start transmission
-		 */
-		sc->sc_desc->hme_txd[bix].tx_addr = (u_long) sc->sc_bufs_dva +
-			(((u_long) &(sc->sc_bufs->tx_buf[bix])) -
-			((u_long) sc->sc_bufs));
-		sc->sc_desc->hme_txd[bix].tx_flags =
-			TXFLAG_OWN | TXFLAG_SOP | TXFLAG_EOP |
-			(len & TXFLAG_SIZE);
-
-		sc->sc_txr->tx_pnding = TXR_TP_DMAWAKEUP;
-
-		if (++bix == TX_RING_SIZE)
-			bix = 0;
+	stp2002_start(&sc->sc_stp);
+}
 
-		if (++sc->sc_no_td == TX_RING_SIZE) {
-			ifp->if_flags |= IFF_OACTIVE;
-			break;
-		}
-	}
+void
+hme_tx_dmawakeup(v)
+	void *v;
+{
+	struct hme_softc *sc = (struct hme_softc *)v;
 
-	sc->sc_last_td = bix;
+	sc->sc_txr->tx_pnding = TXR_TP_DMAWAKEUP;
 }
 
 #define MAX_STOP_TRIES	16
@@ -340,7 +295,7 @@ hmewatchdog(ifp)
 	struct hme_softc *sc = ifp->if_softc;
 
 	log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname);
-	++sc->sc_arpcom.ac_if.if_oerrors;
+	++sc->sc_stp.stp_arpcom.ac_if.if_oerrors;
 
 	hmereset(sc);
 }
@@ -358,7 +313,7 @@ hmeioctl(ifp, cmd, data)
 
 	s = splimp();
 
-	if ((error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data)) > 0) {
+	if ((error = ether_ioctl(ifp, &sc->sc_stp.stp_arpcom, cmd, data)) > 0) {
 		splx(s);
 		return error;
 	}
@@ -370,7 +325,7 @@ hmeioctl(ifp, cmd, data)
 #ifdef INET
 		case AF_INET:
 			hmeinit(sc);
-			arp_ifinit(&sc->sc_arpcom, ifa);
+			arp_ifinit(&sc->sc_stp.stp_arpcom, ifa);
 			break;
 #endif /* INET */
 #ifdef NS
@@ -381,11 +336,11 @@ hmeioctl(ifp, cmd, data)
 
 			if (ns_nullhost(*ina))
 				ina->x_host = 
-				    *(union ns_host *)(sc->sc_arpcom.ac_enaddr);
+				    *(union ns_host *)(sc->sc_stp.stp_arpcom.ac_enaddr);
 			else
 				bcopy(ina->x_host.c_host,
-				    sc->sc_arpcom.ac_enaddr,
-				    sizeof(sc->sc_arpcom.ac_enaddr));
+				    sc->sc_stp.stp_arpcom.ac_enaddr,
+				    sizeof(sc->sc_stp.stp_arpcom.ac_enaddr));
 			/* Set new address. */
 			hmeinit(sc);
 			break;
@@ -433,8 +388,8 @@ hmeioctl(ifp, cmd, data)
 	case SIOCADDMULTI:
 	case SIOCDELMULTI:
 		error = (cmd == SIOCADDMULTI) ?
-			ether_addmulti(ifr, &sc->sc_arpcom):
-			ether_delmulti(ifr, &sc->sc_arpcom);
+			ether_addmulti(ifr, &sc->sc_stp.stp_arpcom):
+			ether_delmulti(ifr, &sc->sc_stp.stp_arpcom);
 
 		if (error == ENETRESET) {
 			/*
@@ -466,7 +421,7 @@ hmeinit(sc)
 	hme_poll_stop(sc);
 	hmestop(sc);
 
-	hme_meminit(sc);
+	stp2002_meminit(&sc->sc_stp);
 
 	tcvr->int_mask = 0xffff;
 
@@ -493,14 +448,14 @@ hmeinit(sc)
 	hme_reset_tx(sc);
 	hme_reset_rx(sc);
 
-	cr->rand_seed = sc->sc_arpcom.ac_enaddr[5] |
-	    ((sc->sc_arpcom.ac_enaddr[4] << 8) & 0x3f00);
-	cr->mac_addr0 = (sc->sc_arpcom.ac_enaddr[0] << 8) |
-			   sc->sc_arpcom.ac_enaddr[1];
-	cr->mac_addr1 = (sc->sc_arpcom.ac_enaddr[2] << 8) |
-			   sc->sc_arpcom.ac_enaddr[3];
-	cr->mac_addr2 = (sc->sc_arpcom.ac_enaddr[4] << 8) |
-			   sc->sc_arpcom.ac_enaddr[5];
+	cr->rand_seed = sc->sc_stp.stp_arpcom.ac_enaddr[5] |
+	    ((sc->sc_stp.stp_arpcom.ac_enaddr[4] << 8) & 0x3f00);
+	cr->mac_addr0 = (sc->sc_stp.stp_arpcom.ac_enaddr[0] << 8) |
+			   sc->sc_stp.stp_arpcom.ac_enaddr[1];
+	cr->mac_addr1 = (sc->sc_stp.stp_arpcom.ac_enaddr[2] << 8) |
+			   sc->sc_stp.stp_arpcom.ac_enaddr[3];
+	cr->mac_addr2 = (sc->sc_stp.stp_arpcom.ac_enaddr[4] << 8) |
+			   sc->sc_stp.stp_arpcom.ac_enaddr[5];
 
 	cr->jsize = HME_DEFAULT_JSIZE;
 	cr->ipkt_gap1 = HME_DEFAULT_IPKT_GAP1;
@@ -510,12 +465,8 @@ hmeinit(sc)
 	cr->htable1 = 0;
 	cr->htable0 = 0;
 
-	rxr->rx_ring = (u_long) sc->sc_desc_dva +
-		(((u_long) &sc->sc_desc->hme_rxd[0])
-		 - ((u_long)sc->sc_desc));
-	txr->tx_ring = (u_long) sc->sc_desc_dva +
-		(((u_long) &sc->sc_desc->hme_txd[0])
-		 - ((u_long)sc->sc_desc));
+	rxr->rx_ring = sc->sc_stp.stp_rx_dvma;
+	txr->tx_ring = sc->sc_stp.stp_tx_dvma;
 
 	if (sc->sc_burst & SBUS_BURST_64)
 		gr->cfg = GR_CFG_BURST64;
@@ -531,20 +482,20 @@ hmeinit(sc)
 	gr->imask = GR_IMASK_SENTFRAME | GR_IMASK_TXPERR |
 	              GR_IMASK_GOTFRAME | GR_IMASK_RCNTEXP;
 
-	txr->tx_rsize = (TX_RING_SIZE >> TXR_RSIZE_SHIFT) - 1;
+	txr->tx_rsize = (STP_TX_RING_SIZE >> TXR_RSIZE_SHIFT) - 1;
 	txr->cfg |= TXR_CFG_DMAENABLE;
 
-	c = RXR_CFG_DMAENABLE | (RX_OFFSET << 3) | (RX_CSUMLOC << 16);
-#if RX_RING_SIZE == 32
+	c = RXR_CFG_DMAENABLE | (STP_RX_OFFSET << 3) | (STP_RX_CSUMLOC << 16);
+#if STP_RX_RING_SIZE == 32
 	c |= RXR_CFG_RINGSIZE32;
-#elif RX_RING_SIZE == 64
+#elif STP_RX_RING_SIZE == 64
 	c |= RXR_CFG_RINGSIZE64;
-#elif RX_RING_SIZE == 128
+#elif STP_RX_RING_SIZE == 128
 	c |= RXR_CFG_RINGSIZE128;
-#elif RX_RING_SIZE == 256
+#elif STP_RX_RING_SIZE == 256
 	c |= RXR_CFG_RINGSIZE256;
 #else
-#error "RX_RING_SIZE must be 32, 64, 128, or 256."
+#error "STP_RX_RING_SIZE must be 32, 64, 128, or 256."
 #endif
 	rxr->cfg = c;
 	DELAY(20);
@@ -1032,7 +983,7 @@ hme_negotiate_watchdog(arg)
 	void *arg;
 {
 	struct hme_softc *sc = (struct hme_softc *)arg;
-	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
+	struct ifnet *ifp = &sc->sc_stp.stp_arpcom.ac_if;
 
 	sc->sc_an_ticks++;
 	switch (sc->sc_an_state) {
@@ -1119,108 +1070,6 @@ hme_reset_rx(sc)
 		printf("%s: reset rx failed\n", sc->sc_dev.dv_xname);
 }
 
-static void
-hme_meminit(sc)
-	struct hme_softc *sc;
-{
-	struct hme_desc *desc = sc->sc_desc;
-	int i;
-
-	/* setup tx descriptors */
-	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
-	for (i = 0; i < TX_RING_SIZE; i++)
-		desc->hme_txd[i].tx_flags = 0;
-
-	/* setup rx descriptors */
-	sc->sc_last_rd = 0;
-	for (i = 0; i < RX_RING_SIZE; i++) {
-
-		desc->hme_rxd[i].rx_addr = (u_long) sc->sc_bufs_dva +
-			(((u_long) &(sc->sc_bufs->rx_buf[i])) -
-			((u_long) sc->sc_bufs));
-
-		desc->hme_rxd[i].rx_flags =
-			RXFLAG_OWN | ((RX_PKT_BUF_SZ - RX_OFFSET) << 16);
-	}
-
-}
-
-/*
- * Pull data off an interface.
- * Len is the length of data, with local net header stripped.
- * We copy the data into mbufs.  When full cluster sized units are present,
- * we copy into clusters.
- */
-static struct mbuf *
-hme_get(sc, idx, totlen)
-	struct hme_softc *sc;
-	int idx, totlen;
-{
-	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
-	struct mbuf *m;
-	struct mbuf *top, **mp;
-	int len, pad, boff = 0;
-
-	MGETHDR(m, M_DONTWAIT, MT_DATA);
-	if (m == NULL)
-		return (NULL);
-	m->m_pkthdr.rcvif = ifp;
-	m->m_pkthdr.len = totlen;
-	pad = ALIGN(sizeof(struct ether_header)) - sizeof(struct ether_header);
-	m->m_data += pad;
-	len = MHLEN - pad;
-	top = NULL;
-	mp = &top;
-
-	while (totlen > 0) {
-		if (top) {
-			MGET(m, M_DONTWAIT, MT_DATA);
-			if (m == NULL) {
-				m_freem(top);
-				return NULL;
-			}
-			len = MLEN;
-		}
-		if (top && totlen >= MINCLSIZE) {
-			MCLGET(m, M_DONTWAIT);
-			if (m->m_flags & M_EXT)
-				len = MCLBYTES;
-		}
-		m->m_len = len = min(totlen, len);
-		bcopy(&(sc->sc_bufs->rx_buf[idx][boff + RX_OFFSET]),
-			mtod(m, caddr_t), len);
-		boff += len;
-		totlen -= len;
-		*mp = m;
-		mp = &m->m_next;
-	}
-
-	return (top);
-}
-
-static int
-hme_put(sc, idx, m)
-	struct hme_softc *sc;
-	int idx;
-	struct mbuf *m;
-{
-	struct mbuf *n;
-	int len, tlen = 0, boff = 0;
-
-	for (; m; m = n) {
-		len = m->m_len;
-		if (len == 0) {
-			MFREE(m, n);
-			continue;
-		}
-		bcopy(mtod(m, caddr_t), &(sc->sc_bufs->tx_buf[idx][boff]), len);
-		boff += len;
-		tlen += len;
-		MFREE(m, n);
-	}
-	return tlen;
-}
-
 /*
  * mif interrupt
  */
@@ -1247,45 +1096,6 @@ hme_mint(sc, why)
 }
 
 /*
- * receive interrupt
- */
-static int
-hme_rint(sc, why)
-	struct hme_softc *sc;
-	u_int32_t why;
-{
-	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
-	int bix, len;
-	struct hme_rxd rxd;
-
-	bix = sc->sc_last_rd;
-
-	/* Process all buffers with valid data. */
-	for (;;) {
-		bcopy(&(sc->sc_desc->hme_rxd[bix]), &rxd, sizeof(rxd));
-		len = rxd.rx_flags >> 16;
-
-		if (rxd.rx_flags & RXFLAG_OWN)
-			break;
-
-		if (rxd.rx_flags & RXFLAG_OVERFLOW)
-			ifp->if_ierrors++;
-		else
-			hme_read(sc, bix, len);
-
-		rxd.rx_flags = RXFLAG_OWN|((RX_PKT_BUF_SZ - RX_OFFSET) << 16);
-		bcopy(&rxd, &(sc->sc_desc->hme_rxd[bix]), sizeof(rxd));
-
-		if (++bix == RX_RING_SIZE)
-			bix = 0;
-	}
-
-	sc->sc_last_rd = bix;
-
-	return 1;
-}
-
-/*
  * error interrupt
  */
 static int
@@ -1362,49 +1172,7 @@ hme_eint(sc, why)
 }
 
 /*
- * transmit interrupt
- */
-static int
-hme_tint(sc, why)
-	struct hme_softc *sc;
-	u_int32_t why;
-{
-	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
-	int bix;
-	struct hme_txd txd;
-
-	bix = sc->sc_first_td;
-
-	for (;;) {
-		if (sc->sc_no_td <= 0)
-			break;
-
-		bcopy(&(sc->sc_desc->hme_txd[bix]), &txd, sizeof(txd));
-
-		if (txd.tx_flags & TXFLAG_OWN)
-			break;
-
-		ifp->if_flags &= ~IFF_OACTIVE;
-		ifp->if_opackets++;
-
-		if (++bix == TX_RING_SIZE)
-			bix = 0;
-
-		--sc->sc_no_td;
-	}
-
-	sc->sc_first_td = bix;
-
-	hmestart(ifp);
-
-	if (sc->sc_no_td == 0)
-		ifp->if_timer = 0;
-
-        return 1;
-}
-
-/*
- * Interrup handler
+ * Interrupt handler
  */
 int
 hmeintr(v)
@@ -1424,58 +1192,14 @@ hmeintr(v)
 		r |= hme_mint(sc, why);
 
 	if (why & (GR_STAT_TXALL | GR_STAT_HOSTTOTX))
-		r |= hme_tint(sc, why);
+		r |= stp2002_tint(&sc->sc_stp);
 
 	if (why & GR_STAT_RXTOHOST)
-		r |= hme_rint(sc, why);
+		r |= stp2002_rint(&sc->sc_stp);
 
 	return (r);
 }
 
-static void
-hme_read(sc, idx, len)
-	struct hme_softc *sc;
-	int idx, len;
-{
-	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
-	struct ether_header *eh;
-	struct mbuf *m;
-
-	if (len <= sizeof(struct ether_header) ||
-	    len > ETHERMTU + sizeof(struct ether_header)) {
-
-		printf("%s: invalid packet size %d; dropping\n",
-		    sc->sc_dev.dv_xname, len);
-
-		ifp->if_ierrors++;
-		return;
-	}
-
-	/* Pull packet off interface. */
-	m = hme_get(sc, idx, len);
-	if (m == NULL) {
-		ifp->if_ierrors++;
-		return;
-	}
-
-	ifp->if_ipackets++;
-
-	/* We assume that the header fit entirely in one mbuf. */
-	eh = mtod(m, struct ether_header *);
-
-#if NBPFILTER > 0
-	/*
-	 * Check if there's a BPF listener on this interface.
-	 * If so, hand off the raw packet to BPF.
-	 */
-	if (ifp->if_bpf)
-		bpf_mtap(ifp->if_bpf, m);
-#endif
-	/* Pass the packet up, with the ether header sort-of removed. */
-	m_adj(m, sizeof(struct ether_header));
-	ether_input(ifp, eh, m);
-}
-
 /*
  * Program the multicast receive filter.
  */
@@ -1483,8 +1207,8 @@ static void
 hme_mcreset(sc)
 	struct hme_softc *sc;
 {
-	struct arpcom *ac = &sc->sc_arpcom;
-	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
+	struct arpcom *ac = &sc->sc_stp.stp_arpcom;
+	struct ifnet *ifp = &sc->sc_stp.stp_arpcom.ac_if;
 	struct hme_cr *cr = sc->sc_cr;
 	struct ether_multi *enm;
 	struct ether_multistep step;