[dpdk-dev] [PATCH v4 04/41] bus/dpaa: add OF parser for device scanning

Thomas Monjalon thomas at monjalon.net
Tue Sep 19 22:01:23 CEST 2017

19/09/2017 16:15, Ferruh Yigit:
> On 9/19/2017 2:37 PM, Shreyansh Jain wrote:
> > On Monday 18 September 2017 08:19 PM, Ferruh Yigit wrote:
> >> On 9/9/2017 12:20 PM, Shreyansh Jain wrote:
> >>> This layer is used by Bus driver's scan function. Devices are parsed
> >>> using OF parser and added to DPAA device list.
> >>
> >> So this is device tree parser in DPDK. Do we really want this, and as
> >> long as DPDK target the bare metal why not get device information from
> >> Linux, as done in other cases?
> > As of now I don't prefer to modify the internal framework as much as 
> > possible as this is stable DPDK DPAA driver.
> > There is indeed a planned transition from OF to /sys/ parsing, but it is 
> > still in pipeline.
> > 
> > You see a blocking issue if we go incremental here?
> > That would be probably more of replacing this file with another /sys 
> > parser without much changes to the DPDK glue code.
> OF parser in DPDK looks weird to me, OS will do this for us already.
> If replacing this is in the roadmap, I think this is not showstopper,
> added Thomas in case he thinks otherwise.

I agree with Ferruh.

I am interested to know if there are cases where a device tree parser
would be relevant in DPDK.
Cc Jan who already worked on this idea.

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