linux-kernel - RE: [EXT] Re: [net-next] net: dsa: felix: disable always guard band bit for TAS config

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Message-ID: <DB8PR04MB5785E8D0499961D6C046092AF0489@DB8PR04MB5785.eurprd04.prod.outlook.com>
Date:   Tue, 20 Apr 2021 03:06:40 +0000
From:   Xiaoliang Yang <xiaoliang.yang_1@....com>
To:     Vladimir Oltean <olteanv@...il.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
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        Po Liu <po.liu@....com>, Mingkai Hu <mingkai.hu@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Leo Li <leoyang.li@....com>
Subject: RE: [EXT] Re: [net-next] net: dsa: felix: disable always guard band
 bit for TAS config

Hi Vladimir.

On Mon, Apr 19, 2021 at 20:38PM +0800, Vladimir Oltean wrote:
>
>What is a scheduled queue? When time-aware scheduling is enabled on the port, why are some queues scheduled and some not?

The felix vsc9959 device can set SCH_TRAFFIC_QUEUES field bits to define which queue is scheduled. Only the set queues serves schedule traffic. In this driver we set all 8 queues to be scheduled in default, so all the traffic are schedule queues to
schedule queue.

Thanks,
Xiaoliang Yang