netdev - [PATCH net-next 3/4] net: phy: add resolved pause support

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Date:   Mon, 17 Feb 2020 15:54:30 +0000
From:   Russell King <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: [PATCH net-next 3/4] net: phy: add resolved pause support

Allow phylib drivers to pass the hardware-resolved pause state to MAC
drivers, rather than using the software-based pause resolution code.

Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/phy_device.c | 6 ++++++
 include/linux/phy.h          | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 2a973265de80..6e1b50defd62 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -2414,6 +2414,12 @@ void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
 		return;
 	}
 
+	if (phydev->resolved_pause_valid) {
+		*tx_pause = phydev->resolved_tx_pause;
+		*rx_pause = phydev->resolved_rx_pause;
+		return;
+	}
+
 	return linkmode_resolve_pause(phydev->advertising,
 				      phydev->lp_advertising,
 				      tx_pause, rx_pause);
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 80f8b2158271..fda23d95e640 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -422,6 +422,15 @@ struct phy_device {
 	int pause;
 	int asym_pause;
 
+	/*
+	 * private to phylib: the resolved pause state - only valid if
+	 * resolved_pause_valid is true. only phy drivers and phylib
+	 * should touch this.
+	 */
+	bool resolved_pause_valid;
+	bool resolved_tx_pause;
+	bool resolved_rx_pause;
+
 	/* Union of PHY and Attached devices' supported link modes */
 	/* See ethtool.h for more info */
 	__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
-- 
2.20.1