net/mlx4_en: Add support for inner IPv6 checksum offloads and TSO

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>From what I can tell the ConnectX-3 will support an inner IPv6 checksum and
segmentation offload, however it cannot support outer IPv6 headers.  This
assumption is based on the fact that I could see the checksum being
offloaded for inner header on IPv4 tunnels, but not on IPv6 tunnels.

For this reason I am adding the feature to the hw_enc_features and adding
an extra check to the features_check call that will disable GSO and
checksum offload in the case that the encapsulated frame has an outer IP
version of that is not 4.  The check in mlx4_en_features_check could be
removed if at some point in the future a fix is found that allows the
hardware to offload segmentation/checksum on tunnels with an outer IPv6
header.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Alexander Duyck 2016-05-02 09:38:37 -07:00 • committed by David S. Miller

parent 3c9346b240

commit 09067122db

2 changed files with 33 additions and 7 deletions

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25

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

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15

drivers/net/ethernet/mellanox/mlx4/en_tx.c

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