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Message-ID: <043CDC76-3C57-4F54-97B6-896591A11CB3@gmail.com> Date: Thu, 25 May 2017 22:54:32 -0700 From: Florian Fainelli <f.fainelli@...il.com> To: "Andrey Jr. Melnikov" <temnota.am@...il.com>, netdev@...r.kernel.org CC: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org Subject: Re: [PATCH net-next v3 5/5] net-next: dsa: add dsa support for Mediatek MT7530 switch On May 24, 2017 4:17:39 AM PDT, "Andrey Jr. Melnikov" <temnota.am@...il.com> wrote: >In gmane.linux.kernel sean.wang@...iatek.com wrote: >> From: Sean Wang <sean.wang@...iatek.com> > >> MT7530 is a 7-ports Gigabit Ethernet Switch that could be found on >> Mediatek router platforms such as MT7623A or MT7623N platform which >> includes 7-port Gigabit Ethernet MAC and 5-port Gigabit Ethernet PHY. >> Among these ports, The port from 0 to 4 are the user ports connecting >> with the remote devices while the port 5 and 6 are the CPU ports >> connecting into Mediatek Ethernet GMAC. > >> For port 6, it can communicate with the CPU via Mediatek Ethernet >GMAC >> through either the TRGMII or RGMII which could be controlled by >phy-mode >> in the dt-bindings to specify which mode is preferred to use. And for >> port 5, only RGMII can be specified. However, currently, only port 6 >is >> being supported in this DSA driver. > >> The driver is made with the reference to qca8k and other existing DSA >> driver. The most of the essential callbacks of the DSA are already >> support in the driver, including tag insert for user port >distinguishing, >> port control, bridge offloading, STP setup and ethtool operation to >allow >> DSA to model each user port into a standalone netdevice as the other >DSA >> driver had done. > >What about JUMBO frames and large MTU support? devlink support? We don't have a ndo_change_mtu callback implemented for DSA network devices but that is probably how we should do it. Regarding devlink, Andrew added basic support for it but unlike mlxsw it is currently of mild interest. Do you have something specific in mind with devlink? -- Florian
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