Re: [RFC PATCH] net: phy/mdio: enable mmd indirect access through phy_mii_ioctl()

[Grygorii Strashko]

On 03/11/2021 02:27, Andrew Lunn wrote:
> > > What i find interesting is that you and the other resent requester are
> > > using the same user space tool. If you implement C45 over C22 in that
> > > tool, you get your solution, and it will work for older kernels as
> > > well. Also, given the diverse implementations of this IOTCL, it
> > > probably works for more drivers than just those using phy_mii_ioctl().
> >
> > Do you mean change uapi, like
> >   add mdio_phy_id_is_c45_over_c22() and
> >   flag #define MDIO_PHY_ID_C45_OVER_C22 0x4000?
>
> No, i mean user space implements C45 over C22. Make phytool write
> MII_MMD_CTRL and MII_MMD_DATA to perform a C45 over C22.

Now I give up - as mentioned there is now way to sync User space vs Kernel
MMD transactions and so no way to get trusted results.


Thanks all for participating in discussion.

--
Best regards,
grygorii