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Date:   Tue, 22 Dec 2020 12:29:55 +0100
From:   Lars Povlsen <lars.povlsen@...rochip.com>
To:     Florian Fainelli <f.fainelli@...il.com>
CC:     Steen Hegelund <steen.hegelund@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Russell King <linux@...linux.org.uk>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Bjarni Jonasson <bjarni.jonasson@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Madalin Bucur <madalin.bucur@....nxp.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Mark Einon <mark.einon@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <Torkil.Oelgaard@...rochip.com>, <Ioannis.Kotleas@...rochip.com>
Subject: Re: [RFC PATCH v2 0/8] Adding the Sparx5 Switch Driver


Florian Fainelli writes:

> On 12/16/2020 11:51 PM, Steen Hegelund wrote:
>> This series provides the Microchip Sparx5 Switch Driver
>>
>> The Sparx5 Carrier Ethernet and Industrial switch family delivers 64
>> Ethernet ports and up to 200 Gbps of switching bandwidth.
>>
>> It provides a rich set of Ethernet switching features such as hierarchical
>> QoS, hardware-based OAM  and service activation testing, protection
>> switching, IEEE 1588, and Synchronous Ethernet.
>>
>> Using provider bridging (Q-in-Q) and MPLS/MPLS-TP technology, it delivers
>> MEF CE
>> 2.0 Ethernet virtual connections (EVCs) and features advanced TCAM
>>   classification in both ingress and egress.
>>
>> Per-EVC features include advanced L3-aware classification, a rich set of
>> statistics, OAM for end-to-end performance monitoring, and dual-rate
>> policing and shaping.
>>
>> Time sensitive networking (TSN) is supported through a comprehensive set of
>> features including frame preemption, cut-through, frame replication and
>> elimination for reliability, enhanced scheduling: credit-based shaping,
>> time-aware shaping, cyclic queuing, and forwarding, and per-stream policing
>> and filtering.
>>
>> Together with IEEE 1588 and IEEE 802.1AS support, this guarantees
>> low-latency deterministic networking for Fronthaul, Carrier, and Industrial
>> Ethernet.
>>
>> The Sparx5 switch family consists of following SKUs:
>>
>> - VSC7546 Sparx5-64 up to 64 Gbps of bandwidth with the following primary
>>   port configurations:
>>   - 6 *10G
>>   - 16 * 2.5G + 2 * 10G
>>   - 24 * 1G + 4 * 10G
>>
>> - VSC7549 Sparx5-90 up to 90 Gbps of bandwidth with the following primary
>>   port configurations:
>>   - 9 * 10G
>>   - 16 * 2.5G + 4 * 10G
>>   - 48 * 1G + 4 * 10G
>>
>> - VSC7552 Sparx5-128 up to 128 Gbps of bandwidth with the following primary
>>   port configurations:
>>   - 12 * 10G
>>   - 16 * 2.5G + 8 * 10G
>>   - 48 * 1G + 8 * 10G
>>
>> - VSC7556 Sparx5-160 up to 160 Gbps of bandwidth with the following primary
>>   port configurations:
>>   - 16 * 10G
>>   - 10 * 10G + 2 * 25G
>>   - 16 * 2.5G + 10 * 10G
>>   - 48 * 1G + 10 * 10G
>>
>> - VSC7558 Sparx5-200 up to 200 Gbps of bandwidth with the following primary
>>   port configurations:
>>   - 20 * 10G
>>   - 8 * 25G
>>
>> In addition, the device supports one 10/100/1000/2500/5000 Mbps
>> SGMII/SerDes node processor interface (NPI) Ethernet port.
>>
>> The Sparx5 support is developed on the PCB134 and PCB135 evaluation boards.
>>
>> - PCB134 main networking features:
>>   - 12x SFP+ front 10G module slots (connected to Sparx5 through SFI).
>>   - 8x SFP28 front 25G module slots (connected to Sparx5 through SFI high
>>     speed).
>>   - Optional, one additional 10/100/1000BASE-T (RJ45) Ethernet port
>>     (on-board VSC8211 PHY connected to Sparx5 through SGMII).
>>
>> - PCB135 main networking features:
>>   - 48x1G (10/100/1000M) RJ45 front ports using 12xVSC8514 QuadPHY’s each
>>     connected to VSC7558 through QSGMII.
>>   - 4x10G (1G/2.5G/5G/10G) RJ45 front ports using the AQR407 10G QuadPHY
>>     each port connects to VSC7558 through SFI.
>>   - 4x SFP28 25G module slots on back connected to VSC7558 through SFI high
>>     speed.
>>   - Optional, one additional 1G (10/100/1000M) RJ45 port using an on-board
>>     VSC8211 PHY, which can be connected to VSC7558 NPI port through SGMII
>>     using a loopback add-on PCB)
>>
>> This series provides support for:
>>   - SFPs and DAC cables via PHYLINK with a number of 5G, 10G and 25G
>>     devices and media types.
>>   - Port module configuration for 10M to 25G speeds with SGMII, QSGMII,
>>     1000BASEX, 2500BASEX and 10GBASER as appropriate for these modes.
>>   - SerDes configuration via the Sparx5 SerDes driver (see below).
>>   - Host mode providing register based injection and extraction.
>>   - Switch mode providing MAC/VLAN table learning and Layer2 switching
>>     offloaded to the Sparx5 switch.
>>   - STP state, VLAN support, host/bridge port mode, Forwarding DB, and
>>     configuration and statistics via ethtool.
>>
>> More support will be added at a later stage.
>>
>> The Sparx5 Switch chip register model can be browsed here:
>> Link: https://microchip-ung.github.io/sparx-5_reginfo/reginfo_sparx-5.html
>
> Out of curiosity, what tool was used to generate the register
> information page? It looks really neat and well organized.

Florian,

It is an in-house tool. The input data is in a proprietary XML-like
format.

We're pleased that you like it, we do too. We are also pleased that
being a Microchip entity, we can actually make this kind of information
public.

I'll pass your praise on.

---Lars

--
Lars Povlsen,
Microchip

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