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From: Petr Machata <petrm@nvidia.com>
To: Daniel Machon <daniel.machon@microchip.com>
Cc: <netdev@vger.kernel.org>, <davem@davemloft.net>,
	<petrm@nvidia.com>, <maxime.chevallier@bootlin.com>,
	<thomas.petazzoni@bootlin.com>, <edumazet@google.com>,
	<kuba@kernel.org>, <pabeni@redhat.com>,
	<lars.povlsen@microchip.com>, <Steen.Hegelund@microchip.com>,
	<UNGLinuxDriver@microchip.com>, <joe@perches.com>,
	<linux@armlinux.org.uk>, <horatiu.vultur@microchip.com>,
	<Julia.Lawall@inria.fr>, <vladimir.oltean@nxp.com>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH net-next v6 1/6] net: dcb: add new pcp selector to app object
Date: Tue, 1 Nov 2022 15:02:39 +0100	[thread overview]
Message-ID: <87edumvkkx.fsf@nvidia.com> (raw)
In-Reply-To: <20221101094834.2726202-2-daniel.machon@microchip.com>


Daniel Machon <daniel.machon@microchip.com> writes:

> Add new PCP selector for the 8021Qaz APP managed object.
>
> As the PCP selector is not part of the 8021Qaz standard, a new non-std
> extension attribute DCB_ATTR_DCB_APP has been introduced. Also two
> helper functions to translate between selector and app attribute type
> has been added. The new selector has been given a value of 255, to
> minimize the risk of future overlap of std- and non-std attributes.
>
> The new DCB_ATTR_DCB_APP is sent alongside the ieee std attribute in the
> app table. This means that the dcb_app struct can now both contain std-
> and non-std app attributes. Currently there is no overlap between the
> selector values of the two attributes.
>
> The purpose of adding the PCP selector, is to be able to offload
> PCP-based queue classification to the 8021Q Priority Code Point table,
> see 6.9.3 of IEEE Std 802.1Q-2018.
>
> PCP and DEI is encoded in the protocol field as 8*dei+pcp, so that a
> mapping of PCP 2 and DEI 1 to priority 3 is encoded as {255, 10, 3}.
>
> Signed-off-by: Daniel Machon <daniel.machon@microchip.com>

Reviewed-by: Petr Machata <petrm@nvidia.com>

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WARNING: multiple messages have this Message-ID (diff)
From: Petr Machata <petrm@nvidia.com>
To: Daniel Machon <daniel.machon@microchip.com>
Cc: <netdev@vger.kernel.org>, <davem@davemloft.net>,
	<petrm@nvidia.com>, <maxime.chevallier@bootlin.com>,
	<thomas.petazzoni@bootlin.com>, <edumazet@google.com>,
	<kuba@kernel.org>, <pabeni@redhat.com>,
	<lars.povlsen@microchip.com>, <Steen.Hegelund@microchip.com>,
	<UNGLinuxDriver@microchip.com>, <joe@perches.com>,
	<linux@armlinux.org.uk>, <horatiu.vultur@microchip.com>,
	<Julia.Lawall@inria.fr>, <vladimir.oltean@nxp.com>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH net-next v6 1/6] net: dcb: add new pcp selector to app object
Date: Tue, 1 Nov 2022 15:02:39 +0100	[thread overview]
Message-ID: <87edumvkkx.fsf@nvidia.com> (raw)
In-Reply-To: <20221101094834.2726202-2-daniel.machon@microchip.com>


Daniel Machon <daniel.machon@microchip.com> writes:

> Add new PCP selector for the 8021Qaz APP managed object.
>
> As the PCP selector is not part of the 8021Qaz standard, a new non-std
> extension attribute DCB_ATTR_DCB_APP has been introduced. Also two
> helper functions to translate between selector and app attribute type
> has been added. The new selector has been given a value of 255, to
> minimize the risk of future overlap of std- and non-std attributes.
>
> The new DCB_ATTR_DCB_APP is sent alongside the ieee std attribute in the
> app table. This means that the dcb_app struct can now both contain std-
> and non-std app attributes. Currently there is no overlap between the
> selector values of the two attributes.
>
> The purpose of adding the PCP selector, is to be able to offload
> PCP-based queue classification to the 8021Q Priority Code Point table,
> see 6.9.3 of IEEE Std 802.1Q-2018.
>
> PCP and DEI is encoded in the protocol field as 8*dei+pcp, so that a
> mapping of PCP 2 and DEI 1 to priority 3 is encoded as {255, 10, 3}.
>
> Signed-off-by: Daniel Machon <daniel.machon@microchip.com>

Reviewed-by: Petr Machata <petrm@nvidia.com>

  reply	other threads:[~2022-11-01 14:04 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-01  9:48 [PATCH net-next v6 0/6] Add new PCP and APPTRUST attributes to dcbnl Daniel Machon
2022-11-01  9:48 ` Daniel Machon
2022-11-01  9:48 ` [PATCH net-next v6 1/6] net: dcb: add new pcp selector to app object Daniel Machon
2022-11-01  9:48   ` Daniel Machon
2022-11-01 14:02   ` Petr Machata [this message]
2022-11-01 14:02     ` Petr Machata
2022-11-01  9:48 ` [PATCH net-next v6 2/6] net: dcb: add new apptrust attribute Daniel Machon
2022-11-01  9:48   ` Daniel Machon
2022-11-01 14:04   ` Petr Machata
2022-11-01 14:04     ` Petr Machata
2022-11-01  9:48 ` [PATCH net-next v6 3/6] net: microchip: sparx5: add support for offloading pcp table Daniel Machon
2022-11-01  9:48   ` Daniel Machon
2022-11-01  9:48 ` [PATCH net-next v6 4/6] net: microchip: sparx5: add support for apptrust Daniel Machon
2022-11-01  9:48   ` Daniel Machon
2022-11-01  9:48 ` [PATCH net-next v6 5/6] net: microchip: sparx5: add support for offloading dscp table Daniel Machon
2022-11-01  9:48   ` Daniel Machon
2022-11-01  9:48 ` [PATCH net-next v6 6/6] net: microchip: sparx5: add support for offloading default prio Daniel Machon
2022-11-01  9:48   ` Daniel Machon
2022-11-03 14:50 ` [PATCH net-next v6 0/6] Add new PCP and APPTRUST attributes to dcbnl patchwork-bot+netdevbpf
2022-11-03 14:50   ` patchwork-bot+netdevbpf

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