TOE has hw support for calculating IP header checkum for IPV4 and TCP/UDP/ICMP checksum for both IPV4 and IPV6. This patch series aims to adds Rx checksum offload supported by TOE. For RX, The result of checksum calculation is attached to last 4byte of ethernet frames. First 2bytes is result of IPV4 header checksum and next 2 bytes is TCP/UDP/ICMP. if frame does not have error "0000" attached to checksum calculation result. For unsupported frames "ffff" is attached to checksum calculation result. Cases like IPV6, IPV4 header is always set to "FFFF". we can test this functionality by the below commands ethtool -K eth0 rx on --> to turn on Rx checksum offload ethtool -K eth0 rx off --> to turn off Rx checksum offload Biju Das (2): ravb: Fillup ravb_set_features_gbeth() stub ravb: Add Rx checksum offload support drivers/net/ethernet/renesas/ravb.h | 20 +++++++++ drivers/net/ethernet/renesas/ravb_main.c | 55 +++++++++++++++++++++++- 2 files changed, 74 insertions(+), 1 deletion(-) -- 2.17.1
