From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH v2 net-next] net: stmmac: Add support for DWMAC5 with TSN features Date: Wed, 01 Nov 2017 20:48:58 +0900 (KST) Message-ID: <20171101.204858.1211893549464034006.davem@davemloft.net> References: <859e8dd503b6368d4ec2ac2130cdeb88f48e2ae9.1509112414.git.joabreu@synopsys.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Joao.Pinto@synopsys.com, peppe.cavallaro@st.com, alexandre.torgue@st.com To: Jose.Abreu@synopsys.com Return-path: In-Reply-To: <859e8dd503b6368d4ec2ac2130cdeb88f48e2ae9.1509112414.git.joabreu@synopsys.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.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.