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charset="utf-8" ENETC rev 4.1 supports TCP and UDP checksum offload for receive, the bit 108 of the Rx BD will be set if the TCP/UDP checksum is correct. Since this capability is not defined in register, the rx_csum bit is added to struct enetc_drvdata to indicate whether the device supports Rx checksum offload. Signed-off-by: Wei Fang Reviewed-by: Frank Li Reviewed-by: Claudiu Manoil --- v2: no changes v3: no changes v4: no changes v5: no changes --- drivers/net/ethernet/freescale/enetc/enetc.c | 14 ++++++++++---- drivers/net/ethernet/freescale/enetc/enetc.h | 2 ++ drivers/net/ethernet/freescale/enetc/enetc_hw.h | 2 ++ .../net/ethernet/freescale/enetc/enetc_pf_common.c | 3 +++ 4 files changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/eth= ernet/freescale/enetc/enetc.c index 35634c516e26..3137b6ee62d3 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.c +++ b/drivers/net/ethernet/freescale/enetc/enetc.c @@ -1011,10 +1011,15 @@ static void enetc_get_offloads(struct enetc_bdr *rx= _ring, =20 /* TODO: hashing */ if (rx_ring->ndev->features & NETIF_F_RXCSUM) { - u16 inet_csum =3D le16_to_cpu(rxbd->r.inet_csum); - - skb->csum =3D csum_unfold((__force __sum16)~htons(inet_csum)); - skb->ip_summed =3D CHECKSUM_COMPLETE; + if (priv->active_offloads & ENETC_F_RXCSUM && + le16_to_cpu(rxbd->r.flags) & ENETC_RXBD_FLAG_L4_CSUM_OK) { + skb->ip_summed =3D CHECKSUM_UNNECESSARY; + } else { + u16 inet_csum =3D le16_to_cpu(rxbd->r.inet_csum); + + skb->csum =3D csum_unfold((__force __sum16)~htons(inet_csum)); + skb->ip_summed =3D CHECKSUM_COMPLETE; + } } =20 if (le16_to_cpu(rxbd->r.flags) & ENETC_RXBD_FLAG_VLAN) { @@ -3281,6 +3286,7 @@ static const struct enetc_drvdata enetc_pf_data =3D { static const struct enetc_drvdata enetc4_pf_data =3D { .sysclk_freq =3D ENETC_CLK_333M, .pmac_offset =3D ENETC4_PMAC_OFFSET, + .rx_csum =3D 1, .eth_ops =3D &enetc4_pf_ethtool_ops, }; =20 diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/eth= ernet/freescale/enetc/enetc.h index 72fa03dbc2dd..5b65f79e05be 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.h +++ b/drivers/net/ethernet/freescale/enetc/enetc.h @@ -234,6 +234,7 @@ enum enetc_errata { =20 struct enetc_drvdata { u32 pmac_offset; /* Only valid for PSI which supports 802.1Qbu */ + u8 rx_csum:1; u64 sysclk_freq; const struct ethtool_ops *eth_ops; }; @@ -341,6 +342,7 @@ enum enetc_active_offloads { ENETC_F_QBV =3D BIT(9), ENETC_F_QCI =3D BIT(10), ENETC_F_QBU =3D BIT(11), + ENETC_F_RXCSUM =3D BIT(12), }; =20 enum enetc_flags_bit { diff --git a/drivers/net/ethernet/freescale/enetc/enetc_hw.h b/drivers/net/= ethernet/freescale/enetc/enetc_hw.h index 7c3285584f8a..4b8fd1879005 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h +++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h @@ -645,6 +645,8 @@ union enetc_rx_bd { #define ENETC_RXBD_LSTATUS(flags) ((flags) << 16) #define ENETC_RXBD_FLAG_VLAN BIT(9) #define ENETC_RXBD_FLAG_TSTMP BIT(10) +/* UDP and TCP checksum offload, for ENETC 4.1 and later */ +#define ENETC_RXBD_FLAG_L4_CSUM_OK BIT(12) #define ENETC_RXBD_FLAG_TPID GENMASK(1, 0) =20 #define ENETC_MAC_ADDR_FILT_CNT 8 /* # of supported entries per port */ diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c b/drive= rs/net/ethernet/freescale/enetc/enetc_pf_common.c index 0eecfc833164..91e79582a541 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c @@ -119,6 +119,9 @@ void enetc_pf_netdev_setup(struct enetc_si *si, struct = net_device *ndev, =20 ndev->priv_flags |=3D IFF_UNICAST_FLT; =20 + if (si->drvdata->rx_csum) + priv->active_offloads |=3D ENETC_F_RXCSUM; + /* TODO: currently, i.MX95 ENETC driver does not support advanced feature= s */ if (!is_enetc_rev1(si)) { ndev->hw_features &=3D ~(NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK); --=20 2.34.1