Enable xdp rx checksum offload support for CHECKSUM_UNNECESSARY use-case. Introduce flag field in xdp_buff/xdp_frame in order to save the checksum result from the NIC and have a fast access to it performing XDP_REDIRECT. CHECKSUM_COMPLETE is not supported yet since it will require adding the csum result to the xdp_metadata area. Moreover flag field will be reused for xdp multi-buff support. This series has been tested generating UDP traffic with pktgen and performing a xdp_redirect from an ixgbe device to a remote CPUMAP entry. PPS results show a negligible penalty respect to the baseline where the UDP checksum has been disabled. More info about the test can be found here [0]. [0] https://github.com/xdp-project/xdp-project/blob/master/areas/core/xdp_frame01_checksum.org Lorenzo Bianconi (4): net: xdp: introduce flags field in xdp_buff and xdp_frame mvneta: return csum computation result from mvneta_rx_csum net: mvneta: report csum result in xdp_buff net: xdp: update csum building the skb drivers/net/ethernet/marvell/mvneta.c | 27 ++++++++------------ include/net/xdp.h | 36 +++++++++++++++++++++++++++ net/core/xdp.c | 2 +- 3 files changed, 48 insertions(+), 17 deletions(-) -- 2.31.1
