From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiner Kallweit Subject: [PATCH net-next] net: phy: improve generic EEE ethtool functions Date: Tue, 27 Nov 2018 22:30:14 +0100 Message-ID: <340253d5-26d2-d36f-74b1-3ec13e3525cf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: "netdev@vger.kernel.org" To: Andrew Lunn , Florian Fainelli , David Miller Return-path: Received: from mail-wr1-f66.google.com ([209.85.221.66]:35313 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726304AbeK1I3k (ORCPT ); Wed, 28 Nov 2018 03:29:40 -0500 Received: by mail-wr1-f66.google.com with SMTP id 96so24246231wrb.2 for ; Tue, 27 Nov 2018 13:30:25 -0800 (PST) Content-Language: en-US Sender: netdev-owner@vger.kernel.org List-ID: So far the two functions consider neither member eee_enabled nor eee_active. Therefore network drivers have to do this in some kind of glue code. I think this can be avoided. Getting EEE parameters: When not advertising any EEE mode, we can't consider EEE to be enabled. Therefore interpret "EEE enabled" as "we advertise at least one EEE mode". It's similar with "EEE active": interpret it as "EEE modes advertised by both link partner have at least one mode in common". Setting EEE parameters: If eee_enabled isn't set, don't advertise any EEE mode and restart aneg if needed to switch off EEE. If eee_enabled is set and data->advertised is empty (e.g. because EEE was disabled), advertise everything we support as default. This way EEE can easily switched on/off by doing ethtool --set-eee eee on/off, w/o any additional parameters. The changes to both functions shouldn't break any existing user. Once the changes have been applied, at least some users can be simplified. Signed-off-by: Heiner Kallweit --- drivers/net/phy/phy.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 376a0d8a2..e1a1e54ba 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1144,6 +1144,7 @@ int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) if (val < 0) return val; data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); + data->eee_enabled = !!data->advertised; /* Get LP advertisement EEE */ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); @@ -1151,6 +1152,8 @@ int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) return val; data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); + data->eee_active = !!(data->advertised & data->lp_advertised); + return 0; } EXPORT_SYMBOL(phy_ethtool_get_eee); @@ -1164,7 +1167,7 @@ EXPORT_SYMBOL(phy_ethtool_get_eee); */ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) { - int cap, old_adv, adv, ret; + int cap, old_adv, adv = 0, ret; if (!phydev->drv) return -EIO; @@ -1178,10 +1181,12 @@ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) if (old_adv < 0) return old_adv; - adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; - - /* Mask prohibited EEE modes */ - adv &= ~phydev->eee_broken_modes; + if (data->eee_enabled) { + adv = !data->advertised ? cap : + ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; + /* Mask prohibited EEE modes */ + adv &= ~phydev->eee_broken_modes; + } if (old_adv != adv) { ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); -- 2.19.2