netdev - [PATCH RFC net-next 2/3] net: dsa: allow DSA switch drivers to provide their own phylink mac ops

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Message-Id: <E1rs1Rp-005g7S-3j@rmk-PC.armlinux.org.uk>
Date: Wed, 03 Apr 2024 15:18:41 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH RFC net-next 2/3] net: dsa: allow DSA switch drivers to
 provide their own phylink mac ops

Rather than having a shim for each and every phylink MAC operation,
allow DSA switch drivers to provide their own ops structure.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 include/net/dsa.h | 5 +++++
 net/dsa/port.c    | 9 +++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index f228b479a5fd..7edfd8de8882 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -457,6 +457,11 @@ struct dsa_switch {
 	 */
 	const struct dsa_switch_ops	*ops;
 
+	/*
+	 * Allow a DSA switch driver to override the phylink MAC ops
+	 */
+	const struct phylink_mac_ops	*phylink_mac_ops;
+
 	/*
 	 * User mii_bus and devices for the individual ports.
 	 */
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 02bf1c306bdc..4cafbc505009 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -1662,6 +1662,7 @@ static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
 
 int dsa_port_phylink_create(struct dsa_port *dp)
 {
+	const struct phylink_mac_ops *mac_ops;
 	struct dsa_switch *ds = dp->ds;
 	phy_interface_t mode;
 	struct phylink *pl;
@@ -1685,8 +1686,12 @@ int dsa_port_phylink_create(struct dsa_port *dp)
 		}
 	}
 
-	pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn),
-			    mode, &dsa_port_phylink_mac_ops);
+	mac_ops = &dsa_port_phylink_mac_ops;
+	if (ds->phylink_mac_ops)
+		mac_ops = ds->phylink_mac_ops;
+
+	pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn), mode,
+			    mac_ops);
 	if (IS_ERR(pl)) {
 		pr_err("error creating PHYLINK: %ld\n", PTR_ERR(pl));
 		return PTR_ERR(pl);
-- 
2.30.2