From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932625AbdKALtF (ORCPT ); Wed, 1 Nov 2017 07:49:05 -0400 Received: from shards.monkeyblade.net ([184.105.139.130]:52386 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754496AbdKALtD (ORCPT ); Wed, 1 Nov 2017 07:49:03 -0400 Date: Wed, 01 Nov 2017 20:48:58 +0900 (KST) Message-Id: <20171101.204858.1211893549464034006.davem@davemloft.net> To: Jose.Abreu@synopsys.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Joao.Pinto@synopsys.com, peppe.cavallaro@st.com, alexandre.torgue@st.com Subject: Re: [PATCH v2 net-next] net: stmmac: Add support for DWMAC5 with TSN features From: David Miller In-Reply-To: <859e8dd503b6368d4ec2ac2130cdeb88f48e2ae9.1509112414.git.joabreu@synopsys.com> References: <859e8dd503b6368d4ec2ac2130cdeb88f48e2ae9.1509112414.git.joabreu@synopsys.com> X-Mailer: Mew version 6.7 on Emacs 25.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 01 Nov 2017 04:49:03 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jose Abreu Date: Fri, 27 Oct 2017 14:55:44 +0100 > This adds support for IP version 5 of DWMAC. The new introduced > features are the Enhancements to Scheduled Traffic (EST) as > defined by IEEE802.1Qbv-2015 and Frame Preemption (FPE) as > defined by IEEE802.1Qbu. > > In order to not break previous setups all the necessary > configuration is only performed when GMAC5 is detected and > only when all the necessary parameters are available in the > Device Tree. > > EST: > The IEEE802.1Qbv-2015 defines the schedule for each of the > queues which makes the IP aware of traffic arrival time. This > information can be used to block the lower priority traffic > from transmission in this time window/slot. > > FPE: > The IEEE802.1Qbu defines a mechanism which breaks interfering > frames into smaller fragments shuch that we have a more efficient > use of network bandwidth. This needs EST enabled. > > Signed-off-by: Jose Abreu > Cc: David S. Miller > Cc: Joao Pinto > Cc: Giuseppe Cavallaro > Cc: Alexandre Torgue > --- > Changes since v1: > - Removed DT parsing This patch is pointless until something is added which turns on the boolean enable values.