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| author | yongari <yongari@FreeBSD.org> | 2008-03-28 01:21:21 +0000 |
|---|---|---|
| committer | yongari <yongari@FreeBSD.org> | 2008-03-28 01:21:21 +0000 |
| commit | e8dec714c152599d2c50ced87a4f8feac69f47be (patch) | |
| tree | 5c0f9b16502a0566dcc1156adef8feb1da3df8bf /lib/libc | |
| parent | cee246254050beb0770a8ab9cdff03f44c2db3c9 (diff) | |
| download | FreeBSD-src-e8dec714c152599d2c50ced87a4f8feac69f47be.zip FreeBSD-src-e8dec714c152599d2c50ced87a4f8feac69f47be.tar.gz | |
In revision 1.70, 1.71 and 1.84 re(4) tried to workaround checksum
offload bugs by manual padding for short IP/UDP frames. Unfortunately
it seems that these workaround does not work reliably on newer PCIe
variants of RealTek chips.
To workaround the hardware bug, always pad short frames if Tx IP
checksum offload is requested. It seems that the hardware has a
bug in IP checksum offload handling. NetBSD manually pads short
frames only when the length of IP frame is less than 28 bytes but I
chose 60 bytes to safety. Also unconditionally set IP checksum
offload bit in Tx descriptor if any TCP or UDP checksum offload is
requested. This is the same way as Linux does but it's not
mentioned in data sheet.
Obtained from: NetBSD
Tested by: remko, danger
Diffstat (limited to 'lib/libc')
0 files changed, 0 insertions, 0 deletions
