Paths

Table of Contentst

Differential D54395

dwc: improve checksum offloading
ClosedPublic
Actions

Authored by tuexen on Dec 29 2025, 2:18 PM.

Tags

None

Referenced Files

	Unknown Object (File)
	Thu, Jan 29, 12:12 AM

	Unknown Object (File)
	Sat, Jan 17, 5:25 PM

	Unknown Object (File)
	Fri, Jan 16, 10:57 AM

	Unknown Object (File)
	Wed, Jan 14, 2:04 PM

	Unknown Object (File)
	Wed, Jan 14, 11:47 AM

	Unknown Object (File)
	Wed, Jan 14, 5:50 AM

	Unknown Object (File)
	Mon, Jan 12, 6:35 AM

	Unknown Object (File)
	Sun, Jan 11, 8:39 PM

View All 17 Files

Subscribers

Details

Reviewers

timo.voelker_fh-muenster.de
manu
bnovkov
br

Commits

rGdecd5ea5d248: dwc: improve IPv4 transmit checksum offloading
rGa83f6427c15d: dwc: improve IPv4 transmit checksum offloading
rGf8ddf74175c8: dwc: improve IPv4 transmit checksum offloading

Summary

This patch provides two improvements for TCP/IPv4 and UDP/IPv4 checksum offloading:

Use *CIC_SEG instead of *CIC_FULL, since FreeBSD always provides a pseudo header checksum.
Don't make IPv4 header checksum offloading a prerequisite for TCP/IPv4 or UDP/IPv4 checksum offloading.

This is the root cause of PR 291696, since right now the epair interface does not support IPv4 header checksum offloading, but TCP/IPv4 and UDP/IPv4 checksum offloading.

Thanks to Marek Benc for reporting the issue and testing the fix.

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Skipped

Unit

Tests Skipped

Event Timeline

tuexen created this revision.Dec 29 2025, 2:18 PM

Herald added a subscriber: imp. · View Herald TranscriptDec 29 2025, 2:18 PM

tuexen requested review of this revision.Dec 29 2025, 2:18 PM

The different checksum offloading features should work independently.

I don't understand why *CIC_FULL worked at all.

This seems to be a good improvement to me.

timo.voelker_fh-muenster.de accepted this revision.Jan 2 2026, 9:19 AM

This revision is now accepted and ready to land.Jan 2 2026, 9:19 AM

Closed by commit rGf8ddf74175c8: dwc: improve IPv4 transmit checksum offloading (authored by tuexen). · Explain WhyFri, Jan 16, 11:10 AM

This revision was automatically updated to reflect the committed changes.

tuexen added a commit: rGf8ddf74175c8: dwc: improve IPv4 transmit checksum offloading.

tuexen added a commit: rGa83f6427c15d: dwc: improve IPv4 transmit checksum offloading.Wed, Jan 21, 2:04 PM

tuexen added a commit: rGdecd5ea5d248: dwc: improve IPv4 transmit checksum offloading.Wed, Jan 21, 7:51 PM

Revision Contents
Changeset List

Path

Size

sys/

dev/

dwc/

21 lines

Diff 168701

sys/dev/dwc/dwc1000_dma.c

Loading...