IB/mthca: Add IPoIB checksum offload support
Arbel and Sinai devices support checksum generation and verification of TCP and UDP packets for UD IPoIB messages. This patch checks if the HCA supports this and sets the IB_DEVICE_UD_IP_CSUM capability flag if it does. It implements support for handling the IB_SEND_IP_CSUM send flag and setting the csum_ok field in receive work completions. Signed-off-by: NEli Cohen <eli@mellnaox.co.il> Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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