Re: [PATCH RFC net-next v3 2/4] net: dsa: add tag formats for MxL862xx switches

[Daniel Golle]

On Tue, Dec 16, 2025 at 10:39:35PM +0200, Vladimir Oltean wrote:
> On Mon, Dec 15, 2025 at 12:11:43AM +0000, Daniel Golle wrote:
> > the actual tag format differs significantly, hence we need a dedicated
> > tag driver for that.
> 
> Reusing the same EtherType for two different DSA tagging protocols is
> very bad news, possibly with implications also for libpcap. Is the
> EtherType configurable in the MXL862xx family?

Only the egress EtherType can be configured, there is currently no way
to configure the ingress EtherType the switch expects to receive on
special-tag packets on the CPU port. MaxLinear, however, said they could
in theory release a new firmware changing the EtherType to any suggested
value, but it would be incompatible with existing downstream drivers in
the field, obviously.