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authorEric Dumazet <edumazet@google.com>2018-04-19 08:49:29 -0700
committerDavid S. Miller <davem@davemloft.net>2018-05-04 11:59:19 -0400
commit2d943adf860302a4c7bfee498e64ded9fe7d9dba (patch)
treec41bf16890c1891a6f5b4db0b1fb5a8945f0c0d7 /net
parenta8d7d124941973d3de9f388ead826a40929d8707 (diff)
net/mlx4_en: optimizes get_fixed_ipv6_csum()
While trying to support CHECKSUM_COMPLETE for IPV6 fragments, I had to experiments various hacks in get_fixed_ipv6_csum(). I must admit I could not find how to implement this :/ However, get_fixed_ipv6_csum() does a lot of redundant operations, calling csum_partial() twice. First csum_partial() computes the checksum of saddr and daddr, put in @csum_pseudo_hdr. Undone later in the second csum_partial() computed on whole ipv6 header. Then nexthdr is added once, added a second time, then substracted. payload_len is added once, then substracted. Really all this can be reduced to two add_csum(), to add back 6 bytes that were removed by mlx4 when providing hw_checksum in RX descriptor. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Saeed Mahameed <saeedm@mellanox.com> Cc: Tariq Toukan <tariqt@mellanox.com> Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Acked-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions