Index: share/man/man4/bge.4
===================================================================
--- share/man/man4/bge.4	(revision 249631)
+++ share/man/man4/bge.4	(working copy)
@@ -31,7 +31,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 19, 2012
+.Dd April 18, 2013
 .Dt BGE 4
 .Os
 .Sh NAME
@@ -220,6 +220,22 @@
 The default value is 0 which disables UDP transmit checksum offloading.
 The interface need to be brought down and up again before a change takes
 effect.
+.It Va dev.bge.%d.bge_rx_coal_ticks
+Controls the maximum time to wait for RX packets before updating the status to
+the host.
+Defaults to 150us.
+.It Va dev.bge.%d.bge_tx_coal_ticks
+Controls the maximum time to wait for TX packets before updating the status to
+the host.
+Defaults to 150us.
+.It Va dev.bge.%d.bge_rx_max_coal_bds
+Controls the maximum number of buffer descriptors (BD) to be processed before
+updating the status to the host.
+Defaults to 10.
+.It Va dev.bge.%d.bge_tx_max_coal_bds
+Controls the maximum number of buffer descriptors (BD) to be processed before
+updating the status to the host.
+Defaults to 10.
 .El
 .Sh DIAGNOSTICS
 .Bl -diag
@@ -243,6 +259,10 @@
 The device has stopped responding to the network, or there is a problem with
 the network connection (cable).
 .El
+.Sh SUPPORT
+For general information and support,
+go to the Broadcom NIC Open Source Developer Resource Site:
+.Pa http://www.broadcom.com/support/ethernet_nic/open_source.php .
 .Sh SEE ALSO
 .Xr altq 4 ,
 .Xr arp 4 ,
Index: sys/dev/bge/if_bge.c
===================================================================
--- sys/dev/bge/if_bge.c	(revision 249631)
+++ sys/dev/bge/if_bge.c	(working copy)
@@ -500,6 +500,10 @@
 static void bge_add_sysctl_stats(struct bge_softc *, struct sysctl_ctx_list *,
     struct sysctl_oid_list *);
 static int bge_sysctl_stats(SYSCTL_HANDLER_ARGS);
+static int bge_sysctl_set_rx_coal_ticks(SYSCTL_HANDLER_ARGS);
+static int bge_sysctl_set_tx_coal_ticks(SYSCTL_HANDLER_ARGS);
+static int bge_sysctl_set_rx_max_coal_bds(SYSCTL_HANDLER_ARGS);
+static int bge_sysctl_set_tx_max_coal_bds(SYSCTL_HANDLER_ARGS);
 
 static device_method_t bge_methods[] = {
 	/* Device interface */
@@ -6151,6 +6155,37 @@
 		bge_add_sysctl_stats_regs(sc, ctx, children);
 	else
 		bge_add_sysctl_stats(sc, ctx, children);
+
+	sc->bge_rx_coal_ticks = 150;
+	snprintf(tn, sizeof(tn), "dev.bge.%d.bge_rx_coal_ticks", unit);
+	TUNABLE_INT_FETCH(tn, &sc->bge_rx_coal_ticks);
+	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rx_coal_ticks",
+	    CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_set_rx_coal_ticks, "I",
+	    "Maximum time(usec) used to coalesce BD ring before host "
+	    "notification of arrival of packets");
+
+	sc->bge_tx_coal_ticks = 150;
+	snprintf(tn, sizeof(tn), "dev.bge.%d.bge_tx_coal_ticks", unit);
+	TUNABLE_INT_FETCH(tn, &sc->bge_tx_coal_ticks);
+	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tx_coal_ticks",
+	    CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_set_tx_coal_ticks, "I",
+	    "Maximum time(usec) used to coalesce BD ring before transmit of "
+	    "packets");
+
+	sc->bge_rx_max_coal_bds = 10;
+	snprintf(tn, sizeof(tn), "dev.bge.%d.bge_rx_max_coal_bds", unit);
+	TUNABLE_INT_FETCH(tn, &sc->bge_rx_max_coal_bds);
+	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rx_max_coal_bds",
+	    CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_set_rx_max_coal_bds, "I",
+	    "Maximum BD count to coalesce before host notification of "
+	    "arrival of packets");
+
+	sc->bge_tx_max_coal_bds = 10;
+	snprintf(tn, sizeof(tn), "dev.bge.%d.bge_tx_max_coal_bds", unit);
+	TUNABLE_INT_FETCH(tn, &sc->bge_tx_max_coal_bds);
+	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tx_max_coal_bds",
+	    CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_set_tx_max_coal_bds, "I",
+	    "Maximum BD count to coalesce before transmit of packets");
 }
 
 #define BGE_SYSCTL_STAT(sc, ctx, desc, parent, node, oid) \
@@ -6538,6 +6573,59 @@
 #endif
 
 static int
+bge_sysctl_set_rx_coal_ticks(SYSCTL_HANDLER_ARGS) 
+{
+	struct bge_softc *sc;
+	int error;
+
+	sc = (struct bge_softc *)arg1;
+	error = sysctl_handle_int(oidp, &sc->bge_rx_coal_ticks, 0, req);
+        if (error || (req->newptr == NULL))
+                return (error);
+	CSR_WRITE_4(sc, BGE_HCC_RX_COAL_TICKS, sc->bge_rx_coal_ticks);
+	return (error);
+}
+static int
+bge_sysctl_set_tx_coal_ticks(SYSCTL_HANDLER_ARGS) 
+{
+	struct bge_softc *sc;
+	int error;
+
+	sc = (struct bge_softc *)arg1;
+	error = sysctl_handle_int(oidp, &sc->bge_tx_coal_ticks, 0, req);
+        if (error || (req->newptr == NULL))
+                return (error);
+	CSR_WRITE_4(sc, BGE_HCC_TX_COAL_TICKS, sc->bge_tx_coal_ticks);
+	return (error);
+}
+static int
+bge_sysctl_set_rx_max_coal_bds(SYSCTL_HANDLER_ARGS) 
+{
+	struct bge_softc *sc;
+	int error;
+
+	sc = (struct bge_softc *)arg1;
+	error = sysctl_handle_int(oidp, &sc->bge_rx_max_coal_bds, 0, req);
+        if (error || (req->newptr == NULL))
+                return (error);
+	CSR_WRITE_4(sc, BGE_HCC_RX_MAX_COAL_BDS, sc->bge_rx_max_coal_bds);
+	return (error);
+}
+static int
+bge_sysctl_set_tx_max_coal_bds(SYSCTL_HANDLER_ARGS) 
+{
+	struct bge_softc *sc;
+	int error;
+
+	sc = (struct bge_softc *)arg1;
+	error = sysctl_handle_int(oidp, &sc->bge_tx_max_coal_bds, 0, req);
+        if (error || (req->newptr == NULL))
+                return (error);
+	CSR_WRITE_4(sc, BGE_HCC_TX_MAX_COAL_BDS, sc->bge_tx_max_coal_bds);
+	return (error);
+}
+
+static int
 bge_get_eaddr_fw(struct bge_softc *sc, uint8_t ether_addr[])
 {