Re: [PATCH net-next v2 0/8] Add Xilinx TSN Endpoint Ethernet MAC driver

[Jakub Kicinski]

On Wed, 16 Sep 2026 13:31:26 +0530 Neeli, Srinivas wrote:
> On the data path, DSA maps onto the hardware cleanly. On RX, the EP DMA 
> path delivers the source port in sideband metadata, which feeds DSA's 
> existing metadata-based
> demultiplexing to the per-port netdevs. On TX, the normal data path has 
> no destination-port selector and the switch has no independent per-port 
> forwarding mask, so
> standalone isolation is done with a private VLAN containing only the 
> selected port and the EP. The next version uses DSA's tag_8021q helpers 
> to manage those VLANs, insert
> the destination port's VLAN tag (which the hardware strips before wire 
> egress), and handle the transitions between standalone and bridged 
> operation.

Oh, well, that probably makes DSA justifiable here.
Please provide more details in the cover letter for v3.
Given the TSN focus I was expecting that the "EP" will
have the ability to apply metadata to control the treatment
of the egress packets, but sounds like quite the opposite :(