Re: [PATCH 3/3] net: ocelot: add FDMA support

[Vladimir Oltean]

On Thu, Oct 28, 2021 at 04:31:23PM +0200, Clément Léger wrote:
> > Can't we make the FDMA and the manual injection/extraction registers
> > use the same endianness, instead of duplicating code? I can
> > regression-test the manual inj/xtr regs on LS1028A.
> 
> I guess this would be possible by disabling byte swapping
> (INJ_GRP_CFG.BYTE_SWAP) when sending the IFH when in register based
> mode.
> BTW, while checking performances, I noticed that the CPU spent quite a
> long time in packing so I added precomputation of IFH. I could probably
> modify the register based inj/xtr to also use this.

packing() is not the most optimized thing in the world, so I wouldn't
mind if you changed it to some other API, but the ability to read,
understand and modify the XFH/IFH headers easily is something I care
about, so no weird macros that depend upon some particular endianness,
please.