[dpdk-dev] [PATCH v4 00/41] Introduce NXP DPAA Bus, Mempool and PMD

Thomas Monjalon thomas at monjalon.net
Fri Sep 22 16:19:27 CEST 2017

22/09/2017 16:00, Shreyansh Jain:
> From: Thomas Monjalon [mailto:thomas at monjalon.net]
> > At the beginning of fslmc work, I had understood that every NXP SoC were
> > connecting components with the same principle which we could call the
> > "Freescale bus".
> > Then you came with this bus named bus/fslmc, not bus/dpaa2.
> > Now I am confused. What is the exact scope of fslmc? Is it just DPAA2?
> My memory is poor. I will have to look through the old emails what happened - but I recall there was a discussion in initial phases about the naming. "fslmc" came out as a name that is what is the real name of the DPAA2 bus. There was initial a confusion if name of bus in Linux Kernel should match or not - but, we realized that bus is *not* device and device name is "dpaa2".
> As for whether fslmc would cover multiple SoC - that is still true. There are multiple SoCs within the DPAA2 umbrella. LS20XX, LS108X series and some more - all of which use the FSLMC bus (DPAA2 architecture, on FSLMC bus, having 'dpaa2' devices).
> There is another architecture, an old one, which are still popular. This is platform type bus which is aptly named 'dpaa' - and here the confusion of bus name and device doesn't appear. (DPAA bus, using DPAA architecture, exposing 'dpaa' devices).
> Exact scope of FSLMC is just DPAA2 architecture based SoCs. There are many here with new coming up.
> Exact scope of DPAA bus is just DPAA architecture based SoCs. There are many here.
> Does this clear your doubt to some extent?

Yes it is a lot clearer! Thanks

Now that I better understand, I think flsmc bus should have been named
dpaa2 bus. Is it too late?

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