diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0327-at803x-Address-packet-drops-at-low-traffic-rate-due-.patch')
-rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0327-at803x-Address-packet-drops-at-low-traffic-rate-due-.patch | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0327-at803x-Address-packet-drops-at-low-traffic-rate-due-.patch b/target/linux/layerscape/patches-5.4/701-net-0327-at803x-Address-packet-drops-at-low-traffic-rate-due-.patch deleted file mode 100644 index babecdecb7..0000000000 --- a/target/linux/layerscape/patches-5.4/701-net-0327-at803x-Address-packet-drops-at-low-traffic-rate-due-.patch +++ /dev/null @@ -1,83 +0,0 @@ -From 53c3bd0d5a873c23841bb95e7b95c1c3630c50bd Mon Sep 17 00:00:00 2001 -From: Vladimir Oltean <vladimir.oltean@nxp.com> -Date: Thu, 12 Jul 2018 13:03:13 +0300 -Subject: [PATCH] at803x: Address packet drops at low traffic rate due to - SmartEEE feature - -* According to the AR8035 datasheet, smartEEE mode (active by default) - makes the PHY enters sleep after a configurable idle time. It does - this autonomously, without LPI (Low Power Idle) signals coming from MAC. -* Tested with ping (default of 1 second interval) over back-to-back - RGMII between 2 boards having AR8035 at both ends: - - Without patch: - 225 packets transmitted, 145 received, 35% packet loss, time 229334ms - - With patch: - 144 packets transmitted, 144 received, 0% packet loss, time 146378ms - -Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> ---- - drivers/net/phy/Kconfig | 10 ++++++++++ - drivers/net/phy/at803x.c | 22 ++++++++++++++++++++++ - 2 files changed, 32 insertions(+) - ---- a/drivers/net/phy/Kconfig -+++ b/drivers/net/phy/Kconfig -@@ -363,6 +363,16 @@ config AT803X_PHY - ---help--- - Currently supports the AT8030 and AT8035 model - -+config AT803X_PHY_SMART_EEE -+ depends on AT803X_PHY -+ default n -+ tristate "SmartEEE feature for AT803X PHYs" -+ ---help--- -+ Enables the Atheros SmartEEE feature (not IEEE 802.3az). When 2 PHYs -+ which support this feature are connected back-to-back, they may -+ negotiate a low-power sleep mode autonomously, without the Ethernet -+ controller's knowledge. May cause packet loss. -+ - config BCM63XX_PHY - tristate "Broadcom 63xx SOCs internal PHY" - depends on BCM63XX || COMPILE_TEST ---- a/drivers/net/phy/at803x.c -+++ b/drivers/net/phy/at803x.c -@@ -62,6 +62,8 @@ - #define AT803X_DEBUG_REG_5 0x05 - #define AT803X_DEBUG_TX_CLK_DLY_EN BIT(8) - -+#define AT803X_LPI_EN BIT(8) -+ - #define ATH8030_PHY_ID 0x004dd076 - #define ATH8031_PHY_ID 0x004dd074 - #define ATH8032_PHY_ID 0x004dd023 -@@ -299,10 +301,30 @@ static int at803x_probe(struct phy_devic - return ret; - } - -+static void at803x_enable_smart_eee(struct phy_device *phydev, int on) -+{ -+ int value; -+ -+ /* 5.1.11 Smart_eee control3 */ -+ value = phy_read_mmd(phydev, MDIO_MMD_PCS, 0x805D); -+ if (on) -+ value |= AT803X_LPI_EN; -+ else -+ value &= ~AT803X_LPI_EN; -+ phy_write_mmd(phydev, MDIO_MMD_PCS, 0x805D, value); -+} -+ - static int at803x_config_init(struct phy_device *phydev) - { - int ret; - -+ -+#ifdef CONFIG_AT803X_PHY_SMART_EEE -+ at803x_enable_smart_eee(phydev, 1); -+#else -+ at803x_enable_smart_eee(phydev, 0); -+#endif -+ - /* The RX and TX delay default is: - * after HW reset: RX delay enabled and TX delay disabled - * after SW reset: RX delay enabled, while TX delay retains the |