netdev - [PATCH v3 RFC 1/4] net: dsa: Extend the ksz_device structure to hold info about HSR ports

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Date: Mon,  4 Sep 2023 14:02:06 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Eric Dumazet <edumazet@...gle.com>,
	Andrew Lunn <andrew@...n.ch>,
	davem@...emloft.net,
	Paolo Abeni <pabeni@...hat.com>,
	Woojung Huh <woojung.huh@...rochip.com>,
	Vladimir Oltean <olteanv@...il.com>
Cc: Tristram.Ha@...rochip.com,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	UNGLinuxDriver@...rochip.com,
	George McCollister <george.mccollister@...il.com>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lukasz Majewski <lukma@...x.de>
Subject: [PATCH v3 RFC 1/4] net: dsa: Extend the ksz_device 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>
---
Changes for v2:
- Use struct ksz_device to store hsr_ports variable

Changes for v3:
- None
---
 drivers/net/dsa/microchip/ksz_common.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index a4de58847dea..9fcafff0c01d 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -158,6 +158,9 @@ struct ksz_device {
 	bool synclko_125;
 	bool synclko_disable;
 
+	/* Bitmask indicating ports supporting HSR */
+	u16 hsr_ports;
+
 	struct vlan_table *vlan_cache;
 
 	struct ksz_port *ports;
-- 
2.20.1