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From: Sylvain Vasseur <remmog@gmail.com>
Date: Thu, 12 May 2022 19:09:19 +0100
Message-ID: <CABVe3HOvi0nv6ajUJFBkArLNpndgd0bphNiqserVUvS8Xe3-Yg@mail.gmail.com>
Subject: ETH_RSS_NONFRAG_IPV4_UDP with netvsc, and memory setup for mlx4
To: users@dpdk.org
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Hello,

I have been trying to use the netvsc PMD driver lately and face an issue
with the RSS flag for UDP.
I figured that this is because the PMD does not handle NDIS_HASH_UDP_IPV4,
so I am planning at trying to submit a change to the PMD, however I am
unsure about the value of the UDP constant. I found on
https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/NetworkManagement/Ndis/constant.NDIS_HASH_UDP_IPV4.html
that it should be 0x00004000.
Would someone have some proper knowledge about this specific setting?

And after having used that change locally, I am now facing some issues with
the mlx4 PMD used under the hood of netvsc. My memory allocation makes my
buffers exist at a different location than my memory pool and this creates
an issue:
net_mlx4: port 0 unable to find virtually contiguous chunk for address
Did someone already tried to use some custom memory management with the mlx
pmd?

Thanks,
Sylvain

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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hello,<div><br></div><div>I have been trying to use the ne=
tvsc PMD driver lately and face an issue with the RSS flag for UDP.<br>I fi=
gured that this is because the PMD does not handle=C2=A0NDIS_HASH_UDP_IPV4,=
 so I am planning at trying to submit a change to the PMD, however I am uns=
ure about the value of the UDP constant. I found on=C2=A0<a href=3D"https:/=
/microsoft.github.io/windows-docs-rs/doc/windows/Win32/NetworkManagement/Nd=
is/constant.NDIS_HASH_UDP_IPV4.html">https://microsoft.github.io/windows-do=
cs-rs/doc/windows/Win32/NetworkManagement/Ndis/constant.NDIS_HASH_UDP_IPV4.=
html</a> that it should be=C2=A00x00004000.</div><div>Would someone have so=
me proper knowledge about this specific setting?<br><br>And after having us=
ed that change locally, I am now facing some issues with the mlx4 PMD used =
under the hood of netvsc. My memory allocation makes my buffers exist at a =
different location than my memory pool and this creates an issue:<br>net_ml=
x4: port 0 unable to find virtually contiguous chunk for address<br>Did som=
eone already tried to use some custom memory management with the mlx pmd?<b=
r><br>Thanks,<br>Sylvain</div></div>

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