From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 934EE3C141A; Wed, 16 Sep 2026 23:57:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789603056; cv=none; b=dGwfopFmpKMrVMefXNHQGQJvTfOva+zOl/wTjQf/7lVrLf3xTuHeOr1KhDP57qINXtd1ePdHX+/cSbQ+mZIsP5axB9ot3pSJ+zUUmDhfZxTai2qgMvRM7lfiY5VY/VDBlUzJp6COmSeOTA0lYsUlJG7XN+olB4y/Q+Bf9Q73YSc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789603056; c=relaxed/simple; bh=DLieBuqPVyH/HKi26RvJcWHyCXxPKjOInGo7fhpCOUw=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=F3SmnX+w2KSJ54ggURxQFUsdUXRadYxZIq/QLR8DXDWwejlBuE4Rc1zB5HfU5Pz15zglpf+KndB3acaxA9h3EokM4YaaIqZbGDV4yjrQB8hBK4XK6RArAf2RpcgI1kNT7N4Vq4mHnosssLKptfxz6IwRR8lyzGlwHUFpkZ3TtUc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=g/DMyAUf; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="g/DMyAUf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3AB0F1F000FF; Wed, 16 Sep 2026 23:57:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789603055; bh=qYakI41YOepUCc8Ox+8Jq/FeqJw1dMrVoS2gQCRrOmU=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=g/DMyAUfIuO+zZ4KVeJlkf2CXBHROPnONq8wvWi9xtEHbmPQHI3R2V+YC41W4sh0T ek9xnCTFj5uoKxcDTBnYJsu9T7KVTCBFTZcpHYR/Sd5NW6fPM4P1ttvnZ4uYQYa5nY Wuh5Czk0aIs+QpuUQ6FqvACgxaTY7TBZd4KAc0QTEV+y2o/zMTloDXPLbfKwH46bmw zjLEwxXooqkKtJhd6Jnek/YP1gTI6ATU9BiSuYbxiHFgK9YyDFNZeLDOkWHFechVf9 rIr/XX/xdoh5sRsn5YW6VFRzNDMkJYTLulXD8O+B/gZK3uPj0lnkfePoJQX1rI5bp7 1XivUqq/hAr9Q== Date: Wed, 16 Sep 2026 16:57:31 -0700 From: Jakub Kicinski To: "Neeli, Srinivas" Cc: Srinivas Neeli , Nagadheeraj Rottela , Andrew Lunn , "David S. Miller" , Eric Dumazet , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Richard Cochran , Michal Simek , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rt-devel@lists.linux.dev, neelisrinivas18@gmail.com, git@amd.com Subject: Re: [PATCH net-next v2 0/8] Add Xilinx TSN Endpoint Ethernet MAC driver Message-ID: <20260916165731.19ff3f94@kernel.org> In-Reply-To: References: <20260909-patches_v2_external-v2-0-3a40babaff4c@amd.com> <20260915172232.04df37b2@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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 :(