linux-kernel - [PATCH 1/4] net: dsa: Extend the dsa_switch structure to hold info about HSR ports

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Message-Id: <20230829121132.414335-2-lukma@denx.de>
Date:   Tue, 29 Aug 2023 14:11:29 +0200
From:   Lukasz Majewski <lukma@...x.de>
To:     Tristram.Ha@...rochip.com, Eric Dumazet <edumazet@...gle.com>,
        davem@...emloft.net, Woojung Huh <woojung.huh@...rochip.com>,
        Vladimir Oltean <olteanv@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, UNGLinuxDriver@...rochip.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lukasz Majewski <lukma@...x.de>
Subject: [PATCH 1/4] net: dsa: Extend the dsa_switch structure to hold info about HSR ports

Information about HSR aware ports in a DSA switch can be helpful when
one needs tags to be adjusted before the HSR frame is sent.

For example - with ksz9477 switch - the TAG needs to be adjusted to have
both HSR ports marked in tag to allow execution of HW based frame
duplication.

Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
 include/net/dsa.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index d309ee7ed04b..15274afc42bb 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -470,6 +470,9 @@ struct dsa_switch {
 	/* Number of switch port queues */
 	unsigned int		num_tx_queues;
 
+	/* Bitmask indicating ports supporting HSR */
+	u16                     hsr_ports;
+
 	/* Drivers that benefit from having an ID associated with each
 	 * offloaded LAG should set this to the maximum number of
 	 * supported IDs. DSA will then maintain a mapping of _at
-- 
2.20.1