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In order to enable RX checksum offloading we need to check the
meta-information for the (good) frames to see if the L3/4 checksums
were calculated and if there was an error.
The way the buffere are setup, the needed frame meta-information is
already requested. All we have to do is make sure it is really part
of the RX frame, that it is valid, and if the respective bits are set.
Also do not forget to set the (dummy) csum_data as otherwise upper
layers will just be cranky. An artefact of the past which likely
should disappear.
PR: 292006
Reviewed by: bz, tuexen
Tested by: bz, tuexen
Approved by: tuexen
Obtained from: bz (initial version, D55320)
MFC after: 3 days
Sponsored by: Traverse Technologies (providing Ten64 HW for testing)
Differential Revision: https://reviews.freebsd.org/D56383
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As soon as we need information from the hardware frame annotation to
make sure that checksums of the ingress frames were verified by the
DPAA2 HW, I've decided to make a preparation and extracted all of the
frame related routines into the separate dpaa2_frame.[h,c] along with
some clean up and improvements, e.g. no more dpaa2_fa, but dpaa2_swa
and dpaa2_hwa structures to describe software and hardware frame
annotations respectively, dpaa2_fa_get_swa/dpaa2_fa_get_hwa to obtain
those annotations from the frame descriptor. The next step is to
implement dpaa2_fa_get_hwa.
PR: 292006
Approved by: tuexen
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D56315
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