Here is a diff to enable the checksum offload support for stge(4).
Tested with..
stge0 at pci0 dev 3 function 0 "D-Link DGE-550T" rev 0x07
Index: if_stge.c
===================================================================
RCS file: /home/cvs/src/sys/dev/pci/if_stge.c,v
retrieving revision 1.54
diff -u -p -r1.54 if_stge.c
--- if_stge.c 18 Oct 2012 21:44:21 -0000 1.54
+++ if_stge.c 4 Nov 2012 06:35:01 -0000
@@ -376,7 +376,8 @@ stge_attach(struct device *parent, struc
IFQ_SET_MAXLEN(&ifp->if_snd, STGE_NTXDESC - 1);
IFQ_SET_READY(&ifp->if_snd);
- ifp->if_capabilities = IFCAP_VLAN_MTU;
+ ifp->if_capabilities = IFCAP_VLAN_MTU | IFCAP_CSUM_IPv4 |
+ IFCAP_CSUM_TCPv4 | IFCAP_CSUM_UDPv4;
#if NVLAN > 0
ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING;
@@ -399,14 +400,6 @@ stge_attach(struct device *parent, struc
sc->sc_DMACtrl |= DMAC_MWIDisable;
#endif
-#ifdef STGE_CHECKSUM
- /*
- * We can do IPv4/TCPv4/UDPv4 checksums in hardware.
- */
- sc->sc_arpcom.ac_if.if_capabilities |= IFCAP_CSUM_IPv4 |
- IFCAP_CSUM_TCPv4 | IFCAP_CSUM_UDPv4;
-#endif
-
/*
* Attach the interface.
*/
@@ -556,7 +549,6 @@ stge_start(struct ifnet *ifp)
totlen += dmamap->dm_segs[seg].ds_len;
}
-#ifdef STGE_CHECKSUM
/*
* Initialize checksumming flags in the descriptor.
* Byte-swap constants so the compiler can optimize.
@@ -568,7 +560,6 @@ stge_start(struct ifnet *ifp)
csum_flags |= TFD_TCPChecksumEnable;
else if (m0->m_pkthdr.csum_flags & M_UDP_CSUM_OUT)
csum_flags |= TFD_UDPChecksumEnable;
-#endif
/*
* Initialize the descriptor and give it to the chip.
--
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