Fix for GBps network on some AllWinner devices
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Peter Robinson
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164
Add-fix-for-Pine64-gigabit-throughput-issues.patch
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164
Add-fix-for-Pine64-gigabit-throughput-issues.patch
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From patchwork Wed Feb 14 23:02:15 2018
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [U-Boot,
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1/2] net: phy: Add PHY_RTL8211E_PINE64_GIGABIT_FIX for realtek phys
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X-Patchwork-Submitter: Kyle Evans <kevans@freebsd.org>
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X-Patchwork-Id: 873752
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Message-Id: <20180214230216.2001-2-kevans@FreeBSD.org>
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To: andre.przywara@arm.com, joe.hershberger@ni.com,
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philipp.tomsich@theobroma-systems.com, alex.g@adaptrum.com,
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hannes.schmelzer@br-automation.com, sbabic@denx.de,
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jagan@amarulasolutions.com, narmstrong@baylibre.com,
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tharvey@gateworks.com,
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york.sun@nxp.com, madalin.bucur@nxp.com, u-boot@lists.denx.de
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Date: Wed, 14 Feb 2018 17:02:15 -0600
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From: kevans@FreeBSD.org
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List-Id: U-Boot discussion <u-boot.lists.denx.de>
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Setting PHY_RTL8211E_PINE64_GIGABIT_FIX forces internal rx/tx delays off
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on the PHY, as well as flipping some magical undocumented bits. The
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magic number comes from the Pine64 engineering team, presumably as a
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proxy from Realtek. This configuration fixes the throughput on some
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Pine64 models. Packet loss of up to 60-70% has been observed without
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this.
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Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
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---
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drivers/net/phy/Kconfig | 10 ++++++++++
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drivers/net/phy/realtek.c | 34 ++++++++++++++++++++++++++++++++++
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2 files changed, 44 insertions(+)
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diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
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index e32f1eb1c0..ad648a889d 100644
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--- a/drivers/net/phy/Kconfig
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+++ b/drivers/net/phy/Kconfig
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@@ -114,6 +114,16 @@ config PHY_NATSEMI
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config PHY_REALTEK
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bool "Realtek Ethernet PHYs support"
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+config RTL8211E_PINE64_GIGABIT_FIX
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+ bool "Fix gigabit throughput on some Pine64+ models"
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+ depends on PHY_REALTEK
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+ help
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+ Configure the Realtek RTL8211E found on some Pine64+ models differently to
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+ fix throughput on Gigabit links, turning off all internal delays in the
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+ process. The settings that this touches are not documented in the CONFREG
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+ section of the RTL8211E datasheet, but come from Realtek by way of the
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+ Pine64 engineering team.
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+
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config RTL8211X_PHY_FORCE_MASTER
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bool "Ethernet PHY RTL8211x: force 1000BASE-T master mode"
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depends on PHY_REALTEK
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diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
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index 6d917f86f4..d5c2a46c67 100644
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--- a/drivers/net/phy/realtek.c
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+++ b/drivers/net/phy/realtek.c
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@@ -13,6 +13,7 @@
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#include <phy.h>
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#define PHY_RTL8211x_FORCE_MASTER BIT(1)
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+#define PHY_RTL8211E_PINE64_GIGABIT_FIX BIT(2)
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#define PHY_AUTONEGOTIATE_TIMEOUT 5000
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@@ -47,6 +48,13 @@
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#define MIIM_RTL8211F_PHYSTAT_SPDDONE 0x0800
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#define MIIM_RTL8211F_PHYSTAT_LINK 0x0004
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+#define MIIM_RTL8211E_CONFREG 0x1c
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+#define MIIM_RTL8211E_CONFREG_TXD 0x0002
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+#define MIIM_RTL8211E_CONFREG_RXD 0x0004
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+#define MIIM_RTL8211E_CONFREG_MAGIC 0xb400 /* Undocumented */
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+
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+#define MIIM_RTL8211E_EXT_PAGE_SELECT 0x1e
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+
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#define MIIM_RTL8211F_PAGE_SELECT 0x1f
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#define MIIM_RTL8211F_TX_DELAY 0x100
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#define MIIM_RTL8211F_LCR 0x10
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@@ -60,6 +68,15 @@ static int rtl8211b_probe(struct phy_device *phydev)
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return 0;
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}
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+static int rtl8211e_probe(struct phy_device *phydev)
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+{
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+#ifdef CONFIG_RTL8211E_PINE64_GIGABIT_FIX
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+ phydev->flags |= PHY_RTL8211E_PINE64_GIGABIT_FIX;
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+#endif
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+
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+ return 0;
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+}
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+
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/* RealTek RTL8211x */
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static int rtl8211x_config(struct phy_device *phydev)
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{
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@@ -81,6 +98,22 @@ static int rtl8211x_config(struct phy_device *phydev)
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reg |= MIIM_RTL8211x_CTRL1000T_MASTER;
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phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, reg);
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}
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+ if (phydev->flags & PHY_RTL8211E_PINE64_GIGABIT_FIX) {
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+ unsigned int reg;
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+
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+ phy_write(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211F_PAGE_SELECT,
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+ 7);
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+ phy_write(phydev, MDIO_DEVAD_NONE,
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+ MIIM_RTL8211E_EXT_PAGE_SELECT, 0xa4);
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+ reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211E_CONFREG);
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+ /* Ensure both internal delays are turned off */
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+ reg &= ~(MIIM_RTL8211E_CONFREG_TXD | MIIM_RTL8211E_CONFREG_RXD);
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+ /* Flip the magic undocumented bits */
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+ reg |= MIIM_RTL8211E_CONFREG_MAGIC;
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+ phy_write(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211E_CONFREG, reg);
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+ phy_write(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211F_PAGE_SELECT,
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+ 0);
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+ }
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/* read interrupt status just to clear it */
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phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_INER);
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@@ -279,6 +312,7 @@ static struct phy_driver RTL8211E_driver = {
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.uid = 0x1cc915,
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.mask = 0xffffff,
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.features = PHY_GBIT_FEATURES,
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+ .probe = &rtl8211e_probe,
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.config = &rtl8211x_config,
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.startup = &rtl8211e_startup,
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.shutdown = &genphy_shutdown,
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From patchwork Wed Feb 14 23:02:16 2018
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [U-Boot,
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2/2] Configs: Use the newly added PHY_RTL8211E_PINE64_GIGABIT_FIX
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X-Patchwork-Submitter: Kyle Evans <kevans@freebsd.org>
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X-Patchwork-Id: 873751
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Message-Id: <20180214230216.2001-3-kevans@FreeBSD.org>
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To: andre.przywara@arm.com, joe.hershberger@ni.com,
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philipp.tomsich@theobroma-systems.com, alex.g@adaptrum.com,
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hannes.schmelzer@br-automation.com, sbabic@denx.de,
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jagan@amarulasolutions.com, narmstrong@baylibre.com,
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tharvey@gateworks.com,
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york.sun@nxp.com, madalin.bucur@nxp.com, u-boot@lists.denx.de
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Date: Wed, 14 Feb 2018 17:02:16 -0600
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From: kevans@FreeBSD.org
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List-Id: U-Boot discussion <u-boot.lists.denx.de>
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The Pine64+ uses a generic PHY driver, so flip it over to using the Realtek PHY
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driver to actually apply the RTL8211e fix.
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Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
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---
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configs/pine64_plus_defconfig | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/configs/pine64_plus_defconfig b/configs/pine64_plus_defconfig
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index 01ed23844b..149311f2c4 100644
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--- a/configs/pine64_plus_defconfig
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+++ b/configs/pine64_plus_defconfig
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@@ -14,3 +14,5 @@ CONFIG_OF_LIST="sun50i-a64-pine64 sun50i-a64-pine64-plus"
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CONFIG_SUN8I_EMAC=y
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CONFIG_USB_EHCI_HCD=y
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CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y
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+CONFIG_PHY_REALTEK=y
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+CONFIG_RTL8211E_PINE64_GIGABIT_FIX=y
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@ -2,7 +2,7 @@
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Name: uboot-tools
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Version: 2018.03
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Release: 0.3%{?candidate:.%{candidate}}%{?dist}
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Release: 0.4%{?candidate:.%{candidate}}%{?dist}
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Summary: U-Boot utilities
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License: GPLv2+ BSD LGPL-2.1+ LGPL-2.0+
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URL: http://www.denx.de/wiki/U-Boot
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@ -20,6 +20,7 @@ Patch1: uefi-use-Fedora-specific-path-name.patch
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# general fixes
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Patch2: uefi-distro-load-FDT-from-any-partition-on-boot-device.patch
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Patch3: usb-kbd-fixes.patch
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Patch4: Add-fix-for-Pine64-gigabit-throughput-issues.patch
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# Board fixes and enablement
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#Patch10: db-generic-fixes.patch
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@ -287,6 +288,9 @@ cp -p board/warp7/README builds/docs/README.warp7
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%endif
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%changelog
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* Thu Feb 14 2018 Peter Robinson <pbrobinson@fedoraproject.org> 2018.03-0.4.rc2
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- Fix for GBps network on some AllWinner devices
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* Tue Feb 13 2018 Peter Robinson <pbrobinson@fedoraproject.org> 2018.03-0.3.rc2
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- 2018.03 RC2
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