Remoteproc Virtio-Net Support

Remoteproc Virtio-Net Support

[Andreas Werner]

Hello Guys,
We want develop a Time Sensitive Networking (TSN) Application on imx6sx.
Base Idea: The Cortex - M4 do all TSN Network Comunikation and provide
multiply virtual TSN Endpoint for the different Time Channels to Linux
Kernel over VirtIO.
I seen the current Mainline Version of Remoteproc dose support only
one Vdev and 2 Vrings.
We need multiply VirtIO Net devices with multiply vrings. Is there
some patches for Remoteproc to support the VirtioNet Dev with multiply
vdevs and vrings?

Best regards
Andy Werner

Re: Remoteproc Virtio-Net Support

[Bjorn Andersson]

On Thu 01 Sep 09:16 PDT 2016, Andreas Werner wrote:

> Hello Guys,
> We want develop a Time Sensitive Networking (TSN) Application on imx6sx.
> Base Idea: The Cortex - M4 do all TSN Network Comunikation and provide
> multiply virtual TSN Endpoint for the different Time Channels to Linux
> Kernel over VirtIO.

That sounds cool, I like the idea of exposing this using virtio.

> I seen the current Mainline Version of Remoteproc dose support only
> one Vdev and 2 Vrings.

I've looked at that restriction a few times and I believe this is an
artificial limit, but I do not have the history behind it.

> We need multiply VirtIO Net devices with multiply vrings. Is there
> some patches for Remoteproc to support the VirtioNet Dev with multiply
> vdevs and vrings?

I have not seen any such patches, nor heard of people trying to use
remoteproc like you suggest; but I like it!


Please do write up a patch making the vring array of rproc_vdev
dynamically sized (1) and drop the restriction check and we will review
that.

(1) Preferably using a zero-length array at the end of the rproc_vdev
struct.

Regards,
Bjorn