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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Heiner Kallweit , Russell King Cc: Oleksij Rempel , kernel@pengutronix.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Shenwei Wang , Clark Wang , NXP Linux Team Subject: [PATCH net-next v9 5/7] net: phy: Add phy_support_eee() indicating MAC support EEE Date: Sat, 2 Mar 2024 20:53:04 +0100 Message-Id: <20240302195306.3207716-6-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240302195306.3207716-1-o.rempel@pengutronix.de> References: <20240302195306.3207716-1-o.rempel@pengutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792445494041805552 X-GMAIL-MSGID: 1792445494041805552 From: Andrew Lunn In order for EEE to operate, both the MAC and the PHY need to support it, similar to how pause works. With some exception - a number of PHYs have SmartEEE or AutoGrEEEn support in order to provide some EEE-like power savings with non-EEE capable MACs. Copy the pause concept and add the call phy_support_eee() which the MAC makes after connecting the PHY to indicate it supports EEE. phylib will then advertise EEE when auto-neg is performed. Signed-off-by: Andrew Lunn Signed-off-by: Oleksij Rempel --- v6: reword commit message and comment for phy_support_eee() --- drivers/net/phy/phy_device.c | 28 ++++++++++++++++++++++++++++ include/linux/phy.h | 3 ++- 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 2eefee9708510..72452e6a478c0 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -2910,6 +2910,34 @@ void phy_advertise_eee_all(struct phy_device *phydev) } EXPORT_SYMBOL_GPL(phy_advertise_eee_all); +/** + * phy_support_eee - Set initial EEE policy configuration + * @phydev: Target phy_device struct + * + * This function configures the initial policy for Energy Efficient Ethernet + * (EEE) on the specified PHY device, influencing that EEE capabilities are + * advertised before the link is established. It should be called during PHY + * registration by the MAC driver and/or the PHY driver (for SmartEEE PHYs) + * if MAC supports LPI or PHY is capable to compensate missing LPI functionality + * of the MAC. + * + * The function sets default EEE policy parameters, including preparing the PHY + * to advertise EEE capabilities based on hardware support. + * + * It also sets the expected configuration for Low Power Idle (LPI) in the MAC + * driver. If the PHY framework determines that both local and remote + * advertisements support EEE, and the negotiated link mode is compatible with + * EEE, it will set enable_tx_lpi = true. The MAC driver is expected to act on + * this setting by enabling the LPI timer if enable_tx_lpi is set. + */ +void phy_support_eee(struct phy_device *phydev) +{ + linkmode_copy(phydev->advertising_eee, phydev->supported_eee); + phydev->eee_cfg.tx_lpi_enabled = true; + phydev->eee_cfg.eee_enabled = true; +} +EXPORT_SYMBOL(phy_support_eee); + /** * phy_support_sym_pause - Enable support of symmetrical pause * @phydev: target phy_device struct diff --git a/include/linux/phy.h b/include/linux/phy.h index 695e366bd75c1..3f68b8239bb11 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -706,7 +706,7 @@ struct phy_device { __ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising); /* used with phy_speed_down */ __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_old); - /* used for eee validation */ + /* used for eee validation and configuration*/ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported_eee); __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising_eee); bool eee_enabled; @@ -1973,6 +1973,7 @@ void phy_advertise_supported(struct phy_device *phydev); void phy_advertise_eee_all(struct phy_device *phydev); void phy_support_sym_pause(struct phy_device *phydev); void phy_support_asym_pause(struct phy_device *phydev); +void phy_support_eee(struct phy_device *phydev); void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, bool autoneg); void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx);