SEO

Please test with any em(4) adapters.

This enables transmit TCP/UDP checksum offload.

Please send me the dmesg.


Index: if_em.c
================================================== =================
RCS file: /cvs/src/sys/dev/pci/if_em.c,v
retrieving revision 1.166
diff -u -p -r1.166 if_em.c
--- if_em.c 2007/01/26 15:55:30 1.166
+++ if_em.c 2007/01/31 06:35:24
@@ -928,8 +928,7 @@ em_media_change(struct ifnet *ifp)
int
em_encap(struct em_softc *sc, struct mbuf *m_head)
{
- u_int32_t txd_upper;
- u_int32_t txd_lower, txd_used = 0, txd_saved = 0;
+ u_int32_t txd_upper, txd_lower, txd_used, txd_saved;
int i, j, first, error = 0, last = 0;
bus_dmamap_t map;

@@ -941,6 +940,8 @@ em_encap(struct em_softc *sc, struct mbu
struct em_buffer *tx_buffer, *tx_buffer_mapped;
struct em_tx_desc *current_tx_desc = NULL;

+ txd_upper = txd_lower = txd_used = txd_saved = 0;
+
/*
* Force a cleanup if number of TX descriptors
* available hits the threshold
@@ -977,14 +978,8 @@ em_encap(struct em_softc *sc, struct mbu
if (map->dm_nsegs > sc->num_tx_desc_avail - 2)
goto fail;

-#ifdef EM_CSUM_OFFLOAD
if (sc->hw.mac_type >= em_82543)
em_transmit_checksum_setup(sc, m_head, &txd_upper, &txd_lower);
- else
- txd_upper = txd_lower = 0;
-#else
- txd_upper = txd_lower = 0;
-#endif

i = sc->next_avail_tx_desc;
if (sc->pcix_82544)
@@ -1647,10 +1642,8 @@ em_setup_interface(struct em_softc *sc)

ifp->if_capabilities = IFCAP_VLAN_MTU;

-#ifdef EM_CSUM_OFFLOAD
if (sc->hw.mac_type >= em_82543)
- ifp->if_capabilities |= IFCAP_CSUM_TCPv4|IFCAP_CSUM_UDPv4;
-#endif
+ ifp->if_capabilities |= IFCAP_CSUM_TCPv4 | IFCAP_CSUM_UDPv4;

/*
* Specify the media types supported by this adapter and register