Date: Wed, 5 Apr 2017 15:54:57 -0600 From: Sean Bruno <sbruno@freebsd.org> To: Harry Schmalzbauer <freebsd@omnilan.de>, "freebsd-net@freebsd.org" <freebsd-net@FreeBSD.org> Subject: Re: if_igb(4) VLAN(4) and [RT]XCSUM_IPV6, TSO6 Message-ID: <939d3920-0181-8b1a-e0be-5d612286daee@freebsd.org> In-Reply-To: <58CAD8CB.3060101@omnilan.de> References: <58CAD8CB.3060101@omnilan.de>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --SXEMfvcBh5RWXvUl42Ol2oSqK7hCblBud Content-Type: multipart/mixed; boundary="762JxXRA7cRXXaWheHij3pjimMFnq9nTH"; protected-headers="v1" From: Sean Bruno <sbruno@freebsd.org> To: Harry Schmalzbauer <freebsd@omnilan.de>, "freebsd-net@freebsd.org" <freebsd-net@FreeBSD.org> Message-ID: <939d3920-0181-8b1a-e0be-5d612286daee@freebsd.org> Subject: Re: if_igb(4) VLAN(4) and [RT]XCSUM_IPV6, TSO6 References: <58CAD8CB.3060101@omnilan.de> In-Reply-To: <58CAD8CB.3060101@omnilan.de> --762JxXRA7cRXXaWheHij3pjimMFnq9nTH Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 03/16/17 12:26, Harry Schmalzbauer wrote: > Hello, >=20 > I'm wondering if I really loose [RT]XCSUM_IPV6 on if_igb(4) vlan(4) > children. > My igb0 (Kawela, aka 82576) options end with > "TSO6,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6" >=20 > The vlan(4) filtered interfaces show these: > options=3D303<RXCSUM,TXCSUM,TSO4,TSO6> >=20 > So TSO6 is inherited, but RC/TXCSUM_IPV6 dropped? >=20 > In general, how is offloading implemented? If enabled, does the API > simply generate packets lacking the checksum header and NIC (silicon) > fills in the checksum if not adviesd not to do so (by the driver)? > Or is the driver utilizing NIC registers for calculation, but ensures > every packet will have a checksum? >=20 > Thanks, >=20 > -harry >=20 >=20 That looks like a bug. Which version of FreeBSD is this? sean --762JxXRA7cRXXaWheHij3pjimMFnq9nTH-- --SXEMfvcBh5RWXvUl42Ol2oSqK7hCblBud Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQGTBAEBCgB9FiEEuq1GMucSHejSCZfdEgHvyh5yfmQFAljlZ7JfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEJB QUQ0NjMyRTcxMjFERThEMjA5OTdERDEyMDFFRkNBMUU3MjdFNjQACgkQEgHvyh5y fmQ6swgAm61rWummy46oo3klHwFKYKUprcVwpHNAvbtyvrjUNSC3HQu9D4/oGxbG dtPJtrgueC1NXxRij5WyyKvkm3xbEDPnLk8k4yU8RkV8LgDMRY4eq8NClyNmhea/ ralCnIMuSxgp9Ta2RaHyRgQpEhfkBFCySPZRXmi4mxCdUUU7adQxW7O8dy97z3uS 4wZ0LRKf31DB0hI/jAFHFmp9yxjUZAX9yp924x/o8YduBTCP8ntv0lpIwtKSs+N3 qdmZ8Itg/HxeDtZdjZ/Mew8Dp5Xl1ZT+y2Sk0WcPPAWSsAXt59WsRkzNo77uhSdW T99VJo2vEzfdKCghltybUK/yIM5olA== =rz4Q -----END PGP SIGNATURE----- --SXEMfvcBh5RWXvUl42Ol2oSqK7hCblBud--
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