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From: Luke Howard <lukeh@padl.com>
To: Cedric Jehasse <cedric.jehasse@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>, Ivan Vecera <ivecera@redhat.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Simon Horman <horms@kernel.org>,
	Nikolay Aleksandrov <razor@blackwall.org>,
	Ido Schimmel <idosch@nvidia.com>,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	David Ahern <dsahern@kernel.org>, Shuah Khan <shuah@kernel.org>,
	Andrew Lunn <andrew@lunn.ch>, Vladimir Oltean <olteanv@gmail.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	bridge@lists.linux.dev, linux-kselftest@vger.kernel.org,
	Max Hunter <max@huntershome.org>,
	Kieran Tyrrell <kieran@sienda.com>
Subject: Re: [PATCH net-next v2 5/6] net: dsa: mv88e6xxx: MQPRIO support
Date: Wed, 3 Jun 2026 12:09:44 +1000	[thread overview]
Message-ID: <2AC04CE3-1760-49B4-A25D-170629AAD38A@padl.com> (raw)
In-Reply-To: <A662D3F9-18DD-43C9-A43D-912E5A8A4360@padl.com>



> On 3 Jun 2026, at 7:12 am, Luke Howard <lukeh@padl.com> wrote:
> 
>> In case of per port priority mapping, i don't know if this is working as
>> expected, as the IEEE priority mapping is done at ingress.
>> Eg. i think if MQPRIO channel mode is used to configure a pcp to queue mapping
>> on port 1 and a different mapping on port 2. Traffic received on port 1 that
>> gets forwarded to port 2 and egresses port 2 will end up in the queue
>> configured by the mapping on port 1. As mqprio is an egress qdisc, i don't
>> think that's expected.
> 
> Good point, it’s interesting there is egress mapping on the 6390 but only for FPri to DSCP. The Frame Priority Table set ordinal one would expect for egress QPri mapping is “reserved for future use”. (Be nice if it were an undocumented feature.)

I misread the data sheet. Egress PCP to FPRI mapping is possible per-port on the 6390 family. This doesn’t resolve the other issue (MQPRIO-less ports on the 6352 family). But it is good news and I will revise accordingly in the next patch revision.

  parent reply	other threads:[~2026-06-03  2:10 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-02  0:43 [PATCH net-next v2 0/6] net: dsa: mv8ee6xxx: MQPRIO and 802.1Qat support Luke Howard
2026-06-02  0:43 ` [PATCH net-next v2 1/6] net: bridge: mdb: add MDB_FLAGS_STREAM_RESERVED flag Luke Howard
2026-06-02  0:43 ` [PATCH net-next v2 2/6] net: bridge: convert mdb_entry host_joined to a flags field Luke Howard
2026-06-03  7:38   ` Nikolay Aleksandrov
2026-06-02  0:43 ` [PATCH net-next v2 3/6] net: bridge: add 802.1Qat stream reservation admission control Luke Howard
2026-06-02  1:28   ` Luke Howard
2026-06-03  7:35   ` Nikolay Aleksandrov
2026-06-04  5:39     ` Luke Howard
2026-06-05 12:53       ` Cedric Jehasse
2026-06-05 14:44         ` Andrew Lunn
2026-06-06  8:02           ` Luke Howard
2026-06-06  8:21             ` Nikolay Aleksandrov
2026-06-06 21:49               ` Luke Howard
2026-06-06 22:14                 ` Nikolay Aleksandrov
2026-06-07  0:02                   ` Luke Howard
2026-06-05 22:36         ` Luke Howard
2026-06-02  0:43 ` [PATCH net-next v2 4/6] net: bridge: allow MDB_FLAGS_STREAM_RESERVED on host groups Luke Howard
2026-06-02  0:43 ` [PATCH net-next v2 5/6] net: dsa: mv88e6xxx: MQPRIO support Luke Howard
2026-06-02 12:00   ` Cedric Jehasse
2026-06-02 21:12     ` Luke Howard
2026-06-02 23:48       ` Luke Howard
2026-06-02 23:55         ` Andrew Lunn
2026-06-03  0:15           ` Luke Howard
2026-06-03  1:40             ` Luke Howard
2026-06-03  2:41               ` Andrew Lunn
2026-06-03  3:29                 ` Luke Howard
2026-06-04  6:26                   ` Luke Howard
2026-06-03  2:09       ` Luke Howard [this message]
2026-06-03  3:30         ` Luke Howard
     [not found]     ` <808529B1-E40A-4E54-A654-86F1B6D1FA66@padl.com>
2026-06-04  8:36       ` Cedric Jehasse
2026-06-02  0:43 ` [PATCH net-next v2 6/6] net: dsa: mv88e6xxx: honour MDB_FLAGS_STREAM_RESERVED for AVB streams Luke Howard

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