From: Daniel Machon <daniel.machon@microchip.com>
To: <netdev@vger.kernel.org>
Cc: <Allan.Nielsen@microchip.com>, <UNGLinuxDriver@microchip.com>,
<maxime.chevallier@bootlin.com>, <vladimir.oltean@nxp.com>,
<petrm@nvidia.com>, <kuba@kernel.org>, <vinicius.gomes@intel.com>,
<thomas.petazzoni@bootlin.com>,
Daniel Machon <daniel.machon@microchip.com>
Subject: [RFC PATCH v2 net-next 1/2] net: dcb: add new pcp selector to app object
Date: Thu, 15 Sep 2022 11:57:56 +0200 [thread overview]
Message-ID: <20220915095757.2861822-2-daniel.machon@microchip.com> (raw)
In-Reply-To: <20220915095757.2861822-1-daniel.machon@microchip.com>
Add new PCP selector for the 8021Qaz APP managed object.
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}.
While PCP is not a standard 8021Qaz selector, it seems very convenient
to add it to the APP object, as this is where similar priority mapping
is handled, and it perfectly fits the {selector, protocol, priority}
triplet.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
---
include/uapi/linux/dcbnl.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/dcbnl.h b/include/uapi/linux/dcbnl.h
index a791a94013a6..8eab16e5bc13 100644
--- a/include/uapi/linux/dcbnl.h
+++ b/include/uapi/linux/dcbnl.h
@@ -217,6 +217,7 @@ struct cee_pfc {
#define IEEE_8021QAZ_APP_SEL_DGRAM 3
#define IEEE_8021QAZ_APP_SEL_ANY 4
#define IEEE_8021QAZ_APP_SEL_DSCP 5
+#define IEEE_8021QAZ_APP_SEL_PCP 255
/* This structure contains the IEEE 802.1Qaz APP managed object. This
* object is also used for the CEE std as well.
--
2.34.1
next prev parent reply other threads:[~2022-09-15 9:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-15 9:57 [RFC PATCH v2 net-next 0/2] Add PCP selector and new APPTRUST attribute Daniel Machon
2022-09-15 9:57 ` Daniel Machon [this message]
2022-09-19 9:45 ` [RFC PATCH v2 net-next 1/2] net: dcb: add new pcp selector to app object Petr Machata
2022-09-28 13:52 ` Daniel.Machon
2022-09-28 15:50 ` Petr Machata
2022-09-15 9:57 ` [RFC PATCH v2 net-next 2/2] net: dcb: add new apptrust attribute Daniel Machon
2022-09-15 9:51 ` Vladimir Oltean
2022-09-19 7:30 ` Petr Machata
2022-09-19 7:54 ` [RFC PATCH v2 net-next 0/2] Add PCP selector and new APPTRUST attribute Petr Machata
2022-09-19 8:13 ` Daniel.Machon
2022-09-19 15:11 ` Petr Machata
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