Index: sys/dev/age/if_age.c
===================================================================
--- sys/dev/age/if_age.c	(revision 286913)
+++ sys/dev/age/if_age.c	(working copy)
@@ -610,6 +610,9 @@ age_attach(device_t dev)
 	ifp->if_snd.ifq_drv_maxlen = AGE_TX_RING_CNT - 1;
 	IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
 	IFQ_SET_READY(&ifp->if_snd);
+	ifp->if_hw_tsomax = IP_MAXPACKET;
+	ifp->if_hw_tsomaxsegcount = AGE_MAXTXSEGS;
+	ifp->if_hw_tsomaxsegsize = AGE_TSO_MAXSEGSIZE;
 	ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_TSO4;
 	ifp->if_hwassist = AGE_CSUM_FEATURES | CSUM_TSO;
 	if (pci_find_cap(dev, PCIY_PMG, &pmc) == 0) {
Index: sys/dev/alc/if_alc.c
===================================================================
--- sys/dev/alc/if_alc.c	(revision 286913)
+++ sys/dev/alc/if_alc.c	(working copy)
@@ -1554,6 +1554,9 @@ alc_attach(device_t dev)
 	ifp->if_snd.ifq_drv_maxlen = ALC_TX_RING_CNT - 1;
 	IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
 	IFQ_SET_READY(&ifp->if_snd);
+	ifp->if_hw_tsomax = IP_MAXPACKET;
+	ifp->if_hw_tsomaxsegcount = ALC_MAXTXSEGS;
+	ifp->if_hw_tsomaxsegsize = ALC_TSO_MAXSEGSIZE;
 	ifp->if_capabilities = IFCAP_TXCSUM | IFCAP_TSO4;
 	ifp->if_hwassist = ALC_CSUM_FEATURES | CSUM_TSO;
 	if (pci_find_cap(dev, PCIY_PMG, &base) == 0) {
Index: sys/dev/ale/if_ale.c
===================================================================
--- sys/dev/ale/if_ale.c	(revision 286913)
+++ sys/dev/ale/if_ale.c	(working copy)
@@ -625,6 +625,9 @@ ale_attach(device_t dev)
 	ifp->if_snd.ifq_drv_maxlen = ALE_TX_RING_CNT - 1;
 	IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
 	IFQ_SET_READY(&ifp->if_snd);
+	ifp->if_hw_tsomax = IP_MAXPACKET;
+	ifp->if_hw_tsomaxsegcount = ALE_MAXTXSEGS;
+	ifp->if_hw_tsomaxsegsize = ALE_TSO_MAXSEGSIZE;
 	ifp->if_capabilities = IFCAP_RXCSUM | IFCAP_TXCSUM | IFCAP_TSO4;
 	ifp->if_hwassist = ALE_CSUM_FEATURES | CSUM_TSO;
 	if (pci_find_cap(dev, PCIY_PMG, &pmc) == 0) {
Index: sys/dev/bce/if_bce.c
===================================================================
--- sys/dev/bce/if_bce.c	(revision 286913)
+++ sys/dev/bce/if_bce.c	(working copy)
@@ -1393,7 +1393,9 @@ bce_attach(device_t dev)
 	ifp->if_get_counter = bce_get_counter;
 	ifp->if_init	= bce_init;
 	ifp->if_mtu	= ETHERMTU;
-
+	ifp->if_hw_tsomax = IP_MAXPACKET;
+	ifp->if_hw_tsomaxsegcount = BCE_MAX_SEGMENTS;
+	ifp->if_hw_tsomaxsegsize = BCE_TSO_MAX_SEG_SIZE;
 	if (bce_tso_enable) {
 		ifp->if_hwassist = BCE_IF_HWASSIST | CSUM_TSO;
 		ifp->if_capabilities = BCE_IF_CAPABILITIES | IFCAP_TSO4 |
Index: sys/dev/bge/if_bge.c
===================================================================
--- sys/dev/bge/if_bge.c	(revision 286913)
+++ sys/dev/bge/if_bge.c	(working copy)
@@ -3304,6 +3304,7 @@ bge_attach(device_t dev)
 {
 	if_t ifp;
 	struct bge_softc *sc;
+	struct ifnet_hw_tsomax hw_tsomax;
 	uint32_t hwcfg = 0, misccfg, pcistate;
 	u_char eaddr[ETHER_ADDR_LEN];
 	int capmask, error, reg, rid, trys;
@@ -3743,6 +3744,10 @@ bge_attach(device_t dev)
 	if_sethwassist(ifp, sc->bge_csum_features);
 	if_setcapabilities(ifp, IFCAP_HWCSUM | IFCAP_VLAN_HWTAGGING |
 	    IFCAP_VLAN_MTU);
+	hw_tsomax.tsomaxbytes = IP_MAXPACKET;
+	hw_tsomax.tsomaxsegcount = BGE_NSEG_NEW;
+	hw_tsomax.tsomaxsegsize = BGE_TSOSEG_SZ;
+	if_hw_tsomax_update(ifp, &hw_tsomax);
 	if ((sc->bge_flags & (BGE_FLAG_TSO | BGE_FLAG_TSO3)) != 0) {
 		if_sethwassistbits(ifp, CSUM_TSO, 0);
 		if_setcapabilitiesbit(ifp, IFCAP_TSO4 | IFCAP_VLAN_HWTSO, 0);
Index: sys/dev/fxp/if_fxp.c
===================================================================
--- sys/dev/fxp/if_fxp.c	(revision 286913)
+++ sys/dev/fxp/if_fxp.c	(working copy)
@@ -427,6 +427,7 @@ fxp_attach(device_t dev)
 	struct fxp_cb_tx *tcbp;
 	struct fxp_tx *txp;
 	struct fxp_rx *rxp;
+	struct ifnet_hw_tsomax hw_tsomax;
 	if_t ifp;
 	uint32_t val;
 	uint16_t data;
@@ -848,6 +849,10 @@ fxp_attach(device_t dev)
 	if_setcapabilities(ifp, 0);
 	if_setcapenable(ifp, 0);
 
+	hw_tsomax.tsomaxbytes = IP_MAXPACKET;
+	hw_tsomax.tsomaxsegcount = FXP_NTXSEG;
+	hw_tsomax.tsomaxsegsize = FXP_TSO_SEGSIZE;
+        if_hw_tsomax_update(ifp, &hw_tsomax);
 	/* Enable checksum offload/TSO for 82550 or better chips */
 	if (sc->flags & FXP_FLAG_EXT_RFA) {
 		if_sethwassist(ifp, FXP_CSUM_FEATURES | CSUM_TSO);
Index: sys/dev/jme/if_jme.c
===================================================================
--- sys/dev/jme/if_jme.c	(revision 286913)
+++ sys/dev/jme/if_jme.c	(working copy)
@@ -823,6 +823,9 @@ jme_attach(device_t dev)
 	ifp->if_snd.ifq_drv_maxlen = JME_TX_RING_CNT - 1;
 	IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
 	IFQ_SET_READY(&ifp->if_snd);
+	ifp->if_hw_tsomax = IP_MAXPACKET;
+	ifp->if_hw_tsomaxsegcount = JME_MAXTXSEGS;
+	ifp->if_hw_tsomaxsegsize = JME_TSO_MAXSEGSIZE;
 	/* JMC250 supports Tx/Rx checksum offload as well as TSO. */
 	ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_TSO4;
 	ifp->if_hwassist = JME_CSUM_FEATURES | CSUM_TSO;
Index: sys/dev/msk/if_msk.c
===================================================================
--- sys/dev/msk/if_msk.c	(revision 286913)
+++ sys/dev/msk/if_msk.c	(working copy)
@@ -1647,6 +1647,9 @@ msk_attach(device_t dev)
 	if ((sc_if->msk_flags & MSK_FLAG_DESCV2) != 0 &&
 	    (sc_if->msk_flags & MSK_FLAG_NORX_CSUM) == 0)
 		ifp->if_capabilities |= IFCAP_RXCSUM;
+	ifp->if_hw_tsomax = IP_MAXPACKET;
+	ifp->if_hw_tsomaxsegcount = MSK_MAXTXSEGS;
+	ifp->if_hw_tsomaxsegsize = MSK_TSO_MAXSGSIZE;
 	ifp->if_hwassist = MSK_CSUM_FEATURES | CSUM_TSO;
 	ifp->if_capenable = ifp->if_capabilities;
 	ifp->if_ioctl = msk_ioctl;
Index: sys/dev/nfe/if_nfe.c
===================================================================
--- sys/dev/nfe/if_nfe.c	(revision 286913)
+++ sys/dev/nfe/if_nfe.c	(working copy)
@@ -364,6 +364,7 @@ static int
 nfe_attach(device_t dev)
 {
 	struct nfe_softc *sc;
+	struct ifnet_hw_tsomax hw_tsomax;
 	if_t ifp;
 	bus_addr_t dma_addr_max;
 	int error = 0, i, msic, phyloc, reg, rid;
@@ -601,7 +602,10 @@ nfe_attach(device_t dev)
 	if_setsendqlen(ifp, NFE_TX_RING_COUNT - 1);
 	if_setsendqready(ifp);
 
-
+	hw_tsomax.tsomaxbytes = 65535;
+	hw_tsomax.tsomaxsegcount = NFE_MAX_SCATTER;
+	hw_tsomax.tsomaxsegsize = NFE_TSO_MAXSGSIZE;
+	if_hw_tsomax_update(ifp, &hw_tsomax);
 	if (sc->nfe_flags & NFE_HW_CSUM) {
 		if_setcapabilitiesbit(ifp, IFCAP_HWCSUM | IFCAP_TSO4, 0);
 		if_sethwassistbits(ifp, NFE_CSUM_FEATURES | CSUM_TSO, 0);
Index: sys/dev/re/if_re.c
===================================================================
--- sys/dev/re/if_re.c	(revision 286913)
+++ sys/dev/re/if_re.c	(working copy)
@@ -1624,6 +1624,9 @@ re_attach(device_t dev)
 	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 	ifp->if_ioctl = re_ioctl;
 	ifp->if_start = re_start;
+	ifp->if_hw_tsomax = 65535;
+	ifp->if_hw_tsomaxsegcount = RL_NTXSEGS;
+	ifp->if_hw_tsomaxsegsize = 4096;
 	/*
 	 * RTL8168/8111C generates wrong IP checksummed frame if the
 	 * packet has IP options so disable TX checksum offloading.
Index: sys/dev/sge/if_sge.c
===================================================================
--- sys/dev/sge/if_sge.c	(revision 286913)
+++ sys/dev/sge/if_sge.c	(working copy)
@@ -618,6 +618,9 @@ sge_attach(device_t dev)
 	ifp->if_snd.ifq_drv_maxlen = SGE_TX_RING_CNT - 1;
 	IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
 	IFQ_SET_READY(&ifp->if_snd);
+	ifp->if_hw_tsomax = IP_MAXPACKET;
+	ifp->if_hw_tsomaxsegcount = SGE_MAXTXSEGS;
+	ifp->if_hw_tsomaxsegsize = SGE_TSO_MAXSEGSIZE;
 	ifp->if_capabilities = IFCAP_TXCSUM | IFCAP_RXCSUM | IFCAP_TSO4;
 	ifp->if_hwassist = SGE_CSUM_FEATURES | CSUM_TSO;
 	ifp->if_capenable = ifp->if_capabilities;