netdev - [PATCH net-next 3/3] r8169: add support for returning tx_lpi_timer in ethtool get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4eee9c34-c5d6-4c96-9b05-455896dea59a@gmail.com>
Date: Mon, 12 Feb 2024 19:59:26 +0100
From: Heiner Kallweit <hkallweit1@...il.com>
To: Realtek linux nic maintainers <nic_swsd@...ltek.com>,
 Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 David Miller <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next 3/3] r8169: add support for returning tx_lpi_timer in
 ethtool get_eee

Add support for returning the tx_lpi_timer value to userspace.
This is supported by few chip versions only: RTL8168h/RTL8125/RTL8126

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 5244f24a7..7d3f6d59b 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2053,14 +2053,34 @@ static void rtl_set_eee_txidle_timer(struct rtl8169_private *tp)
 	}
 }
 
+static unsigned int r8169_get_tx_lpi_timer_us(struct rtl8169_private *tp)
+{
+	unsigned int speed = tp->phydev->speed;
+	unsigned int timer = tp->tx_lpi_timer;
+
+	if (!timer || speed == SPEED_UNKNOWN)
+		return 0;
+
+	/* tx_lpi_timer value is in bytes */
+	return DIV_ROUND_CLOSEST(timer * BITS_PER_BYTE, speed);
+}
+
 static int rtl8169_get_eee(struct net_device *dev, struct ethtool_keee *data)
 {
 	struct rtl8169_private *tp = netdev_priv(dev);
+	int ret;
 
 	if (!rtl_supports_eee(tp))
 		return -EOPNOTSUPP;
 
-	return phy_ethtool_get_eee(tp->phydev, data);
+	ret = phy_ethtool_get_eee(tp->phydev, data);
+	if (ret)
+		return ret;
+
+	data->tx_lpi_timer = r8169_get_tx_lpi_timer_us(tp);
+	data->tx_lpi_enabled = data->tx_lpi_timer ? data->eee_enabled : false;
+
+	return 0;
 }
 
 static int rtl8169_set_eee(struct net_device *dev, struct ethtool_keee *data)
-- 
2.43.1