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Date: Wed, 01 Nov 2017 20:48:58 +0900 (KST) From: David Miller <davem@...emloft.net> To: Jose.Abreu@...opsys.com Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Joao.Pinto@...opsys.com, peppe.cavallaro@...com, alexandre.torgue@...com Subject: Re: [PATCH v2 net-next] net: stmmac: Add support for DWMAC5 with TSN features From: Jose Abreu <Jose.Abreu@...opsys.com> 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 <joabreu@...opsys.com> > Cc: David S. Miller <davem@...emloft.net> > Cc: Joao Pinto <jpinto@...opsys.com> > Cc: Giuseppe Cavallaro <peppe.cavallaro@...com> > Cc: Alexandre Torgue <alexandre.torgue@...com> > --- > Changes since v1: > - Removed DT parsing This patch is pointless until something is added which turns on the boolean enable values.
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