Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Vinicius Costa Gomes <vinicius.gomes@intel.com>
To:     Po Liu <po.liu@nxp.com>,
        "davem\@davemloft.net" <davem@davemloft.net>,
        "hauke.mehrtens\@intel.com" <hauke.mehrtens@intel.com>,
        "gregkh\@linuxfoundation.org" <gregkh@linuxfoundation.org>,
        "allison\@lohutok.net" <allison@lohutok.net>,
        "tglx\@linutronix.de" <tglx@linutronix.de>,
        "hkallweit1\@gmail.com" <hkallweit1@gmail.com>,
        "saeedm\@mellanox.com" <saeedm@mellanox.com>,
        "andrew\@lunn.ch" <andrew@lunn.ch>,
        "f.fainelli\@gmail.com" <f.fainelli@gmail.com>,
        "alexandru.ardelean\@analog.com" <alexandru.ardelean@analog.com>,
        "jiri\@mellanox.com" <jiri@mellanox.com>,
        "ayal\@mellanox.com" <ayal@mellanox.com>,
        "pablo\@netfilter.org" <pablo@netfilter.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "netdev\@vger.kernel.org" <netdev@vger.kernel.org>
Cc:     "simon.horman\@netronome.com" <simon.horman@netronome.com>,
        Claudiu Manoil <claudiu.manoil@nxp.com>,
        Vladimir Oltean <vladimir.oltean@nxp.com>,
        Alexandru Marginean <alexandru.marginean@nxp.com>,
        Xiaoliang Yang <xiaoliang.yang_1@nxp.com>,
        Roy Zang <roy.zang@nxp.com>, Mingkai Hu <mingkai.hu@nxp.com>,
        Jerry Huang <jerry.huang@nxp.com>, Leo Li <leoyang.li@nxp.com>,
        Po Liu <po.liu@nxp.com>
Subject: Re: [v1,net-next, 1/2] ethtool: add setting frame preemption of traffic classes
In-Reply-To: <20191127094517.6255-1-Po.Liu@nxp.com>
References: <20191127094517.6255-1-Po.Liu@nxp.com>
Date:   Fri, 21 Feb 2020 13:43:33 -0800
Message-ID: <87a75br4ze.fsf@linux.intel.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi,

Po Liu <po.liu@nxp.com> writes:

> IEEE Std 802.1Qbu standard defined the frame preemption of port
> traffic classes. This patch introduce a method to set traffic
> classes preemption. Add a parameter 'preemption' in struct
> ethtool_link_settings. The value will be translated to a binary,
> each bit represent a traffic class. Bit "1" means preemptable
> traffic class. Bit "0" means express traffic class.  MSB represent
> high number traffic class.
>
> If hardware support the frame preemption, driver could set the
> ethernet device with hw_features and features with NETIF_F_PREEMPTION
> when initializing the port driver.
>
> User can check the feature 'tx-preemption' by command 'ethtool -k
> devname'. If hareware set preemption feature. The property would
> be a fixed value 'on' if hardware support the frame preemption.
> Feature would show a fixed value 'off' if hardware don't support
> the frame preemption.
>
> Command 'ethtool devname' and 'ethtool -s devname preemption N'
> would show/set which traffic classes are frame preemptable.
>
> Port driver would implement the frame preemption in the function
> get_link_ksettings() and set_link_ksettings() in the struct ethtool_ops.
>

Any updates on this series? If you think that there's something that I
could help, just tell.


Cheers,
-- 
Vinicius