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[72.194.116.95]) by smtp.gmail.com with ESMTPSA id h7-20020ac85047000000b0035d0520db17sm3429777qtm.49.2022.09.22.08.36.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Sep 2022 08:36:13 -0700 (PDT) Message-ID: Date: Thu, 22 Sep 2022 08:36:12 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.3.0 Subject: Re: [PATCH v2 iproute2-next] ip link: add sub-command to view and change DSA master Content-Language: en-US To: Stephen Hemminger , Jakub Kicinski Cc: Andrew Lunn , Vladimir Oltean , "netdev@vger.kernel.org" , David Ahern , Vivien Didelot References: <20220921165105.1737200-1-vladimir.oltean@nxp.com> <20220921113637.73a2f383@hermes.local> <20220921183827.gkmzula73qr4afwg@skbuf> <20220921154107.61399763@hermes.local> <20220922062405.15837cfe@kernel.org> <20220922082724.7abb328a@hermes.local> From: Florian Fainelli In-Reply-To: <20220922082724.7abb328a@hermes.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 9/22/2022 8:27 AM, Stephen Hemminger wrote: > On Thu, 22 Sep 2022 06:24:05 -0700 > Jakub Kicinski wrote: > >> On Thu, 22 Sep 2022 03:30:43 +0200 Andrew Lunn wrote: >>> Looking at these, none really fit the concept of what the master >>> interface is. >>> >>> slave is also used quite a lot within DSA, but we can probably use >>> user in place of that, it is already somewhat used as a synonym within >>> DSA terminology. >>> >>> Do you have any more recommendations for something which pairs with >>> user. >> >> cpu-ifc? via? > > I did look at the Switch Abstraction Layer document which > started at Microsoft for Sonic and is now part of Open Compute. > > Didn't see anything there. The 802 spec uses words like > aggregator port etc. Top of the rack switches typically have a built-in DMA controller for each user-facing port such that there is not really a management/conduit CPU like what DSA supports, that is the whole reason actually why we keep having a separation between "pure switchdev" and DSA drivers. If you had not attended the talk from Andrew, Vivien and myself back in 2017 in Montreal, I suggest you watch it now in case it provides some inspiration for suggestion appropriate terms: https://www.youtube.com/watch?v=EK5ZmQOYSpM -- Florian