| Message ID | 1479220154-25851-2-git-send-email-jbrunet@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Nov 15, 2016 at 03:29:12PM +0100, Jerome Brunet wrote: > On some platforms, energy efficient ethernet with rtl8211 devices is > causing issue, like throughput drop or broken link. > > This was reported on the OdroidC2 (DWMAC + RTL8211F). While the issue root > cause is not fully understood yet, disabling EEE advertisement prevent auto > negotiation from enabling EEE. > > This patch provides options to disable 1000T and 100TX EEE advertisement > individually for the realtek phys supporting this feature. Looking at the code, i don't see anything specific to RealTek here. This all seems generic. So should it be in phy.c and made a generic OF property which can be applied to any PHY which supports EEE. Andrew
On 11/15/2016 08:30 AM, Andrew Lunn wrote: > On Tue, Nov 15, 2016 at 03:29:12PM +0100, Jerome Brunet wrote: >> On some platforms, energy efficient ethernet with rtl8211 devices is >> causing issue, like throughput drop or broken link. >> >> This was reported on the OdroidC2 (DWMAC + RTL8211F). While the issue root >> cause is not fully understood yet, disabling EEE advertisement prevent auto >> negotiation from enabling EEE. >> >> This patch provides options to disable 1000T and 100TX EEE advertisement >> individually for the realtek phys supporting this feature. > > Looking at the code, i don't see anything specific to RealTek > here. This all seems generic. So should it be in phy.c and made a > generic OF property which can be applied to any PHY which supports > EEE. Agreed. Just to be sure, Jerome, you did verify that with EEE no longer advertised, ethtool --set-eee fails, right? The point is that you may be able to disable EEE on boot, but if there is a way to re-enable it later on, we would want to disable that too.
On Tue, 2016-11-15 at 09:03 -0800, Florian Fainelli wrote: > On 11/15/2016 08:30 AM, Andrew Lunn wrote: > > > > On Tue, Nov 15, 2016 at 03:29:12PM +0100, Jerome Brunet wrote: > > > > > > On some platforms, energy efficient ethernet with rtl8211 devices > > > is > > > causing issue, like throughput drop or broken link. > > > > > > This was reported on the OdroidC2 (DWMAC + RTL8211F). While the > > > issue root > > > cause is not fully understood yet, disabling EEE advertisement > > > prevent auto > > > negotiation from enabling EEE. > > > > > > This patch provides options to disable 1000T and 100TX EEE > > > advertisement > > > individually for the realtek phys supporting this feature. > > > > Looking at the code, i don't see anything specific to RealTek > > here. This all seems generic. So should it be in phy.c and made a > > generic OF property which can be applied to any PHY which supports > > EEE. > > Agreed. Good point, Thanks for pointing this out. > Just to be sure, Jerome, you did verify that with EEE no longer > advertised, ethtool --set-eee fails, right? The point is that you may > be > able to disable EEE on boot, but if there is a way to re-enable it > later > on, we would want to disable that too. I was focused on getting the issue out of way I did not think that someone could try something like this :) I just tried and it is possible to re-enable eee, though it is not simplest thing to do: using ethtool enable eee advertisement, enable eee, restart the autonegotiation without bringing the interface down (otherwise the phy config kicks and disable eee again). I reckon this is not good and I need to address this. There two kind of PHYs supporting eee, the one advertising eee by default (like realtek) and the one not advertising it (like micrel). If the property is going to be generic, I see two options and I'd like your view on this: 1) The DT provided value could be seen as "preferred" (or boot setting), which can be cleanly changed with ethtool later on. In this case, I guess I need to provide a way to force eee advertisement as well to be consistent. 2) The DT provided value could forbid the advertisement of eee. In this case I need to return an error if ethtool tries to re-enable it. Phy with eee advertisement off by default (and not forbidden) would still need to activate it manually with ethtool after boot. I don't see why someone would absolutely want eee activated at boot time so I guess this is OK. Do you have a preference ? Thanks for this quick feedback ! Cheers Jerome
> There two kind of PHYs supporting eee, the one advertising eee by > default (like realtek) and the one not advertising it (like micrel). I don't know too much about EEE. So maybe a dumb question. Does the MAC need to be involved? Or is it just the PHY? If the MAC needs to be involved, the PHY should not be advertising EEE unless the MAC asks for it by calling phy_init_eee(). If this is true, maybe we need to change the realtek driver, and others in that class. Andrew
On Wed, 2016-11-16 at 14:23 +0100, Andrew Lunn wrote: > > > > There two kind of PHYs supporting eee, the one advertising eee by > > default (like realtek) and the one not advertising it (like > > micrel). This is just the default register value. > > I don't know too much about EEE. So maybe a dumb question. Does the > MAC need to be involved? Or is it just the PHY? > > If the MAC needs to be involved, the PHY should not be advertising > EEE > unless the MAC asks for it by calling phy_init_eee(). If this is > true, > maybe we need to change the realtek driver, and others in that class. As far I understand, the advertised capabilities are exchanged during the auto-negotiation. At this stage, if the advertisement is disabled (regarless of the actual support) on either side of the link, there will be no low power idle state on the Tx nor the Rx path. If the advertisement is enabled on both side but we don't call phy_init_eee, I suppose Tx won't enter LPI, but Rx could. > > Andrew
On Wed, Nov 16, 2016 at 03:51:30PM +0100, Jerome Brunet wrote: > On Wed, 2016-11-16 at 14:23 +0100, Andrew Lunn wrote: > > > > > > There two kind of PHYs supporting eee, the one advertising eee by > > > default (like realtek) and the one not advertising it (like > > > micrel). > > This is just the default register value. > > > > > I don't know too much about EEE. So maybe a dumb question. Does the > > MAC need to be involved? Or is it just the PHY? > > > > If the MAC needs to be involved, the PHY should not be advertising > > EEE > > unless the MAC asks for it by calling phy_init_eee(). If this is > > true, > > maybe we need to change the realtek driver, and others in that class. > > As far I understand, the advertised capabilities are exchanged during > the auto-negotiation. > > At this stage, if the advertisement is disabled (regarless of the > actual support) on either side of the link, there will be no low power > idle state on the Tx nor the Rx path. > > If the advertisement is enabled on both side but we don't call > phy_init_eee, I suppose Tx won't enter LPI, but Rx could. What i was trying to find out is, if the MAC needs to support EEE as well as the PHY, what happens when the MAC does not support EEE, but the PHYs do negotiate EEE? Does it break? Andrew
On Wed, 2016-11-16 at 16:06 +0100, Andrew Lunn wrote: > On Wed, Nov 16, 2016 at 03:51:30PM +0100, Jerome Brunet wrote: > > > > On Wed, 2016-11-16 at 14:23 +0100, Andrew Lunn wrote: > > > > > > > > > > > > > > > There two kind of PHYs supporting eee, the one advertising eee > > > > by > > > > default (like realtek) and the one not advertising it (like > > > > micrel). > > > > This is just the default register value. > > > > > > > > > > > I don't know too much about EEE. So maybe a dumb question. Does > > > the > > > MAC need to be involved? Or is it just the PHY? > > > > > > If the MAC needs to be involved, the PHY should not be > > > advertising > > > EEE > > > unless the MAC asks for it by calling phy_init_eee(). If this is > > > true, > > > maybe we need to change the realtek driver, and others in that > > > class. > > > > As far I understand, the advertised capabilities are exchanged > > during > > the auto-negotiation. > > > > At this stage, if the advertisement is disabled (regarless of the > > actual support) on either side of the link, there will be no low > > power > > idle state on the Tx nor the Rx path. > > > > If the advertisement is enabled on both side but we don't call > > phy_init_eee, I suppose Tx won't enter LPI, but Rx could. > > What i was trying to find out is, if the MAC needs to support EEE as > well as the PHY, what happens when the MAC does not support EEE, but > the PHYs do negotiate EEE? Does it break? Interesting question. In a regular case, I suppose it should be fine. As you would have LPI only on the Rx path this should be transparent to the MAC. That's my understanding. Maybe people knowing EEE better than me could confirm (or not) ? Peppe? Alexandre? I just checked with the OdroidC2, I disabled eee support by forcing "dma_cap.eee = 0" in stmmac_get_hw_features. As expected, no tx_LPI interrupts but plenty of rx_LPI interrupts. What was not expected is test failing like before. So in our case, having LPI on the Rx path is fine for receiving data, but not for sending. > > Andrew
On 11/16/2016 07:38 AM, Jerome Brunet wrote: > On Wed, 2016-11-16 at 16:06 +0100, Andrew Lunn wrote: >> On Wed, Nov 16, 2016 at 03:51:30PM +0100, Jerome Brunet wrote: >>> >>> On Wed, 2016-11-16 at 14:23 +0100, Andrew Lunn wrote: >>>> >>>>> >>>>> >>>>> There two kind of PHYs supporting eee, the one advertising eee >>>>> by >>>>> default (like realtek) and the one not advertising it (like >>>>> micrel). >>> >>> This is just the default register value. >>> >>>> >>>> >>>> I don't know too much about EEE. So maybe a dumb question. Does >>>> the >>>> MAC need to be involved? Or is it just the PHY? >>>> >>>> If the MAC needs to be involved, the PHY should not be >>>> advertising >>>> EEE >>>> unless the MAC asks for it by calling phy_init_eee(). If this is >>>> true, >>>> maybe we need to change the realtek driver, and others in that >>>> class. >>> >>> As far I understand, the advertised capabilities are exchanged >>> during >>> the auto-negotiation. >>> >>> At this stage, if the advertisement is disabled (regarless of the >>> actual support) on either side of the link, there will be no low >>> power >>> idle state on the Tx nor the Rx path. >>> >>> If the advertisement is enabled on both side but we don't call >>> phy_init_eee, I suppose Tx won't enter LPI, but Rx could. >> >> What i was trying to find out is, if the MAC needs to support EEE as >> well as the PHY, what happens when the MAC does not support EEE, but >> the PHYs do negotiate EEE? Does it break? > > Interesting question. In a regular case, I suppose it should be fine. > As you would have LPI only on the Rx path this should be transparent to > the MAC. That's my understanding. Maybe people knowing EEE better than > me could confirm (or not) ? Peppe? Alexandre? EEE is a MAC and PHY feature, and both need to agree on what is enabled, especially in the transmit path because the way packets may be transmitted with or without EEE can be done differently at the HW level (faster/slower return to idle, different clock source). > > I just checked with the OdroidC2, I disabled eee support by forcing > "dma_cap.eee = 0" in stmmac_get_hw_features. As expected, no tx_LPI > interrupts but plenty of rx_LPI interrupts. > > What was not expected is test failing like before. > So in our case, having LPI on the Rx path is fine for receiving data, > but not for sending. OK, which really sounds like a potential interoperability problem, or just the Realtek PHY with EEE enabled acting funky (irrespective of being attached to stmmac).
Hi Jerome. On 15 November 2016 at 19:59, Jerome Brunet <jbrunet@baylibre.com> wrote: > On some platforms, energy efficient ethernet with rtl8211 devices is > causing issue, like throughput drop or broken link. > > This was reported on the OdroidC2 (DWMAC + RTL8211F). While the issue root > cause is not fully understood yet, disabling EEE advertisement prevent auto > negotiation from enabling EEE. > > This patch provides options to disable 1000T and 100TX EEE advertisement > individually for the realtek phys supporting this feature. > > Reported-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com> > Cc: Alexandre TORGUE <alexandre.torgue@st.com> > Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> > Tested-by: Andre Roth <neolynx@gmail.com> > --- > drivers/net/phy/realtek.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 64 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c > index aadd6e9f54ad..77235fd5faaf 100644 > --- a/drivers/net/phy/realtek.c > +++ b/drivers/net/phy/realtek.c > @@ -15,6 +15,12 @@ > */ > #include <linux/phy.h> > #include <linux/module.h> > +#include <linux/of.h> > + > +struct rtl8211x_phy_priv { > + bool eee_1000t_disable; > + bool eee_100tx_disable; > +}; > > #define RTL821x_PHYSR 0x11 > #define RTL821x_PHYSR_DUPLEX 0x2000 > @@ -93,12 +99,44 @@ static int rtl8211f_config_intr(struct phy_device *phydev) > return err; > } > > +static void rtl8211x_clear_eee_adv(struct phy_device *phydev) > +{ > + struct rtl8211x_phy_priv *priv = phydev->priv; > + u16 val; > + > + if (priv->eee_1000t_disable || priv->eee_100tx_disable) { > + val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, > + MDIO_MMD_AN); > + > + if (priv->eee_1000t_disable) > + val &= ~MDIO_AN_EEE_ADV_1000T; > + if (priv->eee_100tx_disable) > + val &= ~MDIO_AN_EEE_ADV_100TX; > + > + phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, > + MDIO_MMD_AN, val); > + } > +} > + > +static int rtl8211x_config_init(struct phy_device *phydev) > +{ > + int ret; > + > + ret = genphy_config_init(phydev); > + if (ret < 0) > + return ret; > + > + rtl8211x_clear_eee_adv(phydev); > + > + return 0; > +} > + > static int rtl8211f_config_init(struct phy_device *phydev) > { > int ret; > u16 reg; > > - ret = genphy_config_init(phydev); > + ret = rtl8211x_config_init(phydev); > if (ret < 0) > return ret; > > @@ -115,6 +153,26 @@ static int rtl8211f_config_init(struct phy_device *phydev) > return 0; > } > > +static int rtl8211x_phy_probe(struct phy_device *phydev) > +{ > + struct device *dev = &phydev->mdio.dev; > + struct device_node *of_node = dev->of_node; > + struct rtl8211x_phy_priv *priv; > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + priv->eee_1000t_disable = > + of_property_read_bool(of_node, "realtek,disable-eee-1000t"); > + priv->eee_100tx_disable = > + of_property_read_bool(of_node, "realtek,disable-eee-100tx"); > + > + phydev->priv = priv; > + > + return 0; > +} > + > static struct phy_driver realtek_drvs[] = { > { > .phy_id = 0x00008201, > @@ -140,7 +198,9 @@ static struct phy_driver realtek_drvs[] = { > .phy_id_mask = 0x001fffff, > .features = PHY_GBIT_FEATURES, > .flags = PHY_HAS_INTERRUPT, > + .probe = &rtl8211x_phy_probe, > .config_aneg = genphy_config_aneg, > + .config_init = &rtl8211x_config_init, > .read_status = genphy_read_status, > .ack_interrupt = rtl821x_ack_interrupt, > .config_intr = rtl8211e_config_intr, > @@ -152,7 +212,9 @@ static struct phy_driver realtek_drvs[] = { > .phy_id_mask = 0x001fffff, > .features = PHY_GBIT_FEATURES, > .flags = PHY_HAS_INTERRUPT, > + .probe = &rtl8211x_phy_probe, > .config_aneg = &genphy_config_aneg, > + .config_init = &rtl8211x_config_init, > .read_status = &genphy_read_status, > .ack_interrupt = &rtl821x_ack_interrupt, > .config_intr = &rtl8211e_config_intr, > @@ -164,6 +226,7 @@ static struct phy_driver realtek_drvs[] = { > .phy_id_mask = 0x001fffff, > .features = PHY_GBIT_FEATURES, > .flags = PHY_HAS_INTERRUPT, > + .probe = &rtl8211x_phy_probe, > .config_aneg = &genphy_config_aneg, > .config_init = &rtl8211f_config_init, > .read_status = &genphy_read_status, > -- > 2.7.4 > How about adding callback functionality for .soft_reset to handle BMCR where we update the Auto-Negotiation for the phy, as per the datasheet of the rtl8211f. -Best Regard Anand Moon > > _______________________________________________ > linux-amlogic mailing list > linux-amlogic@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-amlogic
On Wed, 2016-11-16 at 22:36 +0530, Anand Moon wrote: > Hi Jerome. > > On 15 November 2016 at 19:59, Jerome Brunet <jbrunet@baylibre.com> > wrote: > > > > On some platforms, energy efficient ethernet with rtl8211 devices > > is > > causing issue, like throughput drop or broken link. > > > > This was reported on the OdroidC2 (DWMAC + RTL8211F). While the > > issue root > > cause is not fully understood yet, disabling EEE advertisement > > prevent auto > > negotiation from enabling EEE. > > > > This patch provides options to disable 1000T and 100TX EEE > > advertisement > > individually for the realtek phys supporting this feature. > > > > Reported-by: Martin Blumenstingl <martin.blumenstingl@googlemail.co > > m> > > Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com> > > Cc: Alexandre TORGUE <alexandre.torgue@st.com> > > Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> > > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> > > Tested-by: Andre Roth <neolynx@gmail.com> > > --- > > drivers/net/phy/realtek.c | 65 > > ++++++++++++++++++++++++++++++++++++++++++++++- > > 1 file changed, 64 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c > > index aadd6e9f54ad..77235fd5faaf 100644 > > --- a/drivers/net/phy/realtek.c > > +++ b/drivers/net/phy/realtek.c > > @@ -15,6 +15,12 @@ > > */ > > #include <linux/phy.h> > > #include <linux/module.h> > > +#include <linux/of.h> > > + > > +struct rtl8211x_phy_priv { > > + bool eee_1000t_disable; > > + bool eee_100tx_disable; > > +}; > > > > #define RTL821x_PHYSR 0x11 > > #define RTL821x_PHYSR_DUPLEX 0x2000 > > @@ -93,12 +99,44 @@ static int rtl8211f_config_intr(struct > > phy_device *phydev) > > return err; > > } > > > > +static void rtl8211x_clear_eee_adv(struct phy_device *phydev) > > +{ > > + struct rtl8211x_phy_priv *priv = phydev->priv; > > + u16 val; > > + > > + if (priv->eee_1000t_disable || priv->eee_100tx_disable) { > > + val = phy_read_mmd_indirect(phydev, > > MDIO_AN_EEE_ADV, > > + MDIO_MMD_AN); > > + > > + if (priv->eee_1000t_disable) > > + val &= ~MDIO_AN_EEE_ADV_1000T; > > + if (priv->eee_100tx_disable) > > + val &= ~MDIO_AN_EEE_ADV_100TX; > > + > > + phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, > > + MDIO_MMD_AN, val); > > + } > > +} > > + > > +static int rtl8211x_config_init(struct phy_device *phydev) > > +{ > > + int ret; > > + > > + ret = genphy_config_init(phydev); > > + if (ret < 0) > > + return ret; > > + > > + rtl8211x_clear_eee_adv(phydev); > > + > > + return 0; > > +} > > + > > static int rtl8211f_config_init(struct phy_device *phydev) > > { > > int ret; > > u16 reg; > > > > - ret = genphy_config_init(phydev); > > + ret = rtl8211x_config_init(phydev); > > if (ret < 0) > > return ret; > > > > @@ -115,6 +153,26 @@ static int rtl8211f_config_init(struct > > phy_device *phydev) > > return 0; > > } > > > > +static int rtl8211x_phy_probe(struct phy_device *phydev) > > +{ > > + struct device *dev = &phydev->mdio.dev; > > + struct device_node *of_node = dev->of_node; > > + struct rtl8211x_phy_priv *priv; > > + > > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > > + if (!priv) > > + return -ENOMEM; > > + > > + priv->eee_1000t_disable = > > + of_property_read_bool(of_node, "realtek,disable- > > eee-1000t"); > > + priv->eee_100tx_disable = > > + of_property_read_bool(of_node, "realtek,disable- > > eee-100tx"); > > + > > + phydev->priv = priv; > > + > > + return 0; > > +} > > + > > static struct phy_driver realtek_drvs[] = { > > { > > .phy_id = 0x00008201, > > @@ -140,7 +198,9 @@ static struct phy_driver realtek_drvs[] = { > > .phy_id_mask = 0x001fffff, > > .features = PHY_GBIT_FEATURES, > > .flags = PHY_HAS_INTERRUPT, > > + .probe = &rtl8211x_phy_probe, > > .config_aneg = genphy_config_aneg, > > + .config_init = &rtl8211x_config_init, > > .read_status = genphy_read_status, > > .ack_interrupt = rtl821x_ack_interrupt, > > .config_intr = rtl8211e_config_intr, > > @@ -152,7 +212,9 @@ static struct phy_driver realtek_drvs[] = { > > .phy_id_mask = 0x001fffff, > > .features = PHY_GBIT_FEATURES, > > .flags = PHY_HAS_INTERRUPT, > > + .probe = &rtl8211x_phy_probe, > > .config_aneg = &genphy_config_aneg, > > + .config_init = &rtl8211x_config_init, > > .read_status = &genphy_read_status, > > .ack_interrupt = &rtl821x_ack_interrupt, > > .config_intr = &rtl8211e_config_intr, > > @@ -164,6 +226,7 @@ static struct phy_driver realtek_drvs[] = { > > .phy_id_mask = 0x001fffff, > > .features = PHY_GBIT_FEATURES, > > .flags = PHY_HAS_INTERRUPT, > > + .probe = &rtl8211x_phy_probe, > > .config_aneg = &genphy_config_aneg, > > .config_init = &rtl8211f_config_init, > > .read_status = &genphy_read_status, > > -- > > 2.7.4 > > > > How about adding callback functionality for .soft_reset to handle > BMCR > where we update the Auto-Negotiation for the phy, > as per the datasheet of the rtl8211f. I'm not sure I understand how this would help with our issue (and EEE). Am I missing something or is it something unrelated that you would like to see happening on this driver ? > > -Best Regard > Anand Moon > > > > > > > _______________________________________________ > > linux-amlogic mailing list > > linux-amlogic@lists.infradead.org > > http://lists.infradead.org/mailman/listinfo/linux-amlogic
Hi Jerone, On 17 November 2016 at 15:50, Jerome Brunet <jbrunet@baylibre.com> wrote: > On Wed, 2016-11-16 at 22:36 +0530, Anand Moon wrote: >> Hi Jerome. >> >> On 15 November 2016 at 19:59, Jerome Brunet <jbrunet@baylibre.com> >> wrote: >> > >> > On some platforms, energy efficient ethernet with rtl8211 devices >> > is >> > causing issue, like throughput drop or broken link. >> > >> > This was reported on the OdroidC2 (DWMAC + RTL8211F). While the >> > issue root >> > cause is not fully understood yet, disabling EEE advertisement >> > prevent auto >> > negotiation from enabling EEE. >> > >> > This patch provides options to disable 1000T and 100TX EEE >> > advertisement >> > individually for the realtek phys supporting this feature. >> > >> > Reported-by: Martin Blumenstingl <martin.blumenstingl@googlemail.co >> > m> >> > Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com> >> > Cc: Alexandre TORGUE <alexandre.torgue@st.com> >> > Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> >> > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> >> > Tested-by: Andre Roth <neolynx@gmail.com> >> > --- >> > drivers/net/phy/realtek.c | 65 >> > ++++++++++++++++++++++++++++++++++++++++++++++- >> > 1 file changed, 64 insertions(+), 1 deletion(-) >> > >> > diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c >> > index aadd6e9f54ad..77235fd5faaf 100644 >> > --- a/drivers/net/phy/realtek.c >> > +++ b/drivers/net/phy/realtek.c >> > @@ -15,6 +15,12 @@ >> > */ >> > #include <linux/phy.h> >> > #include <linux/module.h> >> > +#include <linux/of.h> >> > + >> > +struct rtl8211x_phy_priv { >> > + bool eee_1000t_disable; >> > + bool eee_100tx_disable; >> > +}; >> > >> > #define RTL821x_PHYSR 0x11 >> > #define RTL821x_PHYSR_DUPLEX 0x2000 >> > @@ -93,12 +99,44 @@ static int rtl8211f_config_intr(struct >> > phy_device *phydev) >> > return err; >> > } >> > >> > +static void rtl8211x_clear_eee_adv(struct phy_device *phydev) >> > +{ >> > + struct rtl8211x_phy_priv *priv = phydev->priv; >> > + u16 val; >> > + >> > + if (priv->eee_1000t_disable || priv->eee_100tx_disable) { >> > + val = phy_read_mmd_indirect(phydev, >> > MDIO_AN_EEE_ADV, >> > + MDIO_MMD_AN); >> > + >> > + if (priv->eee_1000t_disable) >> > + val &= ~MDIO_AN_EEE_ADV_1000T; >> > + if (priv->eee_100tx_disable) >> > + val &= ~MDIO_AN_EEE_ADV_100TX; >> > + >> > + phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, >> > + MDIO_MMD_AN, val); >> > + } >> > +} >> > + >> > +static int rtl8211x_config_init(struct phy_device *phydev) >> > +{ >> > + int ret; >> > + >> > + ret = genphy_config_init(phydev); >> > + if (ret < 0) >> > + return ret; >> > + >> > + rtl8211x_clear_eee_adv(phydev); >> > + >> > + return 0; >> > +} >> > + >> > static int rtl8211f_config_init(struct phy_device *phydev) >> > { >> > int ret; >> > u16 reg; >> > >> > - ret = genphy_config_init(phydev); >> > + ret = rtl8211x_config_init(phydev); >> > if (ret < 0) >> > return ret; >> > >> > @@ -115,6 +153,26 @@ static int rtl8211f_config_init(struct >> > phy_device *phydev) >> > return 0; >> > } >> > >> > +static int rtl8211x_phy_probe(struct phy_device *phydev) >> > +{ >> > + struct device *dev = &phydev->mdio.dev; >> > + struct device_node *of_node = dev->of_node; >> > + struct rtl8211x_phy_priv *priv; >> > + >> > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); >> > + if (!priv) >> > + return -ENOMEM; >> > + >> > + priv->eee_1000t_disable = >> > + of_property_read_bool(of_node, "realtek,disable- >> > eee-1000t"); >> > + priv->eee_100tx_disable = >> > + of_property_read_bool(of_node, "realtek,disable- >> > eee-100tx"); >> > + >> > + phydev->priv = priv; >> > + >> > + return 0; >> > +} >> > + >> > static struct phy_driver realtek_drvs[] = { >> > { >> > .phy_id = 0x00008201, >> > @@ -140,7 +198,9 @@ static struct phy_driver realtek_drvs[] = { >> > .phy_id_mask = 0x001fffff, >> > .features = PHY_GBIT_FEATURES, >> > .flags = PHY_HAS_INTERRUPT, >> > + .probe = &rtl8211x_phy_probe, >> > .config_aneg = genphy_config_aneg, >> > + .config_init = &rtl8211x_config_init, >> > .read_status = genphy_read_status, >> > .ack_interrupt = rtl821x_ack_interrupt, >> > .config_intr = rtl8211e_config_intr, >> > @@ -152,7 +212,9 @@ static struct phy_driver realtek_drvs[] = { >> > .phy_id_mask = 0x001fffff, >> > .features = PHY_GBIT_FEATURES, >> > .flags = PHY_HAS_INTERRUPT, >> > + .probe = &rtl8211x_phy_probe, >> > .config_aneg = &genphy_config_aneg, >> > + .config_init = &rtl8211x_config_init, >> > .read_status = &genphy_read_status, >> > .ack_interrupt = &rtl821x_ack_interrupt, >> > .config_intr = &rtl8211e_config_intr, >> > @@ -164,6 +226,7 @@ static struct phy_driver realtek_drvs[] = { >> > .phy_id_mask = 0x001fffff, >> > .features = PHY_GBIT_FEATURES, >> > .flags = PHY_HAS_INTERRUPT, >> > + .probe = &rtl8211x_phy_probe, >> > .config_aneg = &genphy_config_aneg, >> > .config_init = &rtl8211f_config_init, >> > .read_status = &genphy_read_status, >> > -- >> > 2.7.4 >> > >> >> How about adding callback functionality for .soft_reset to handle >> BMCR >> where we update the Auto-Negotiation for the phy, >> as per the datasheet of the rtl8211f. > > I'm not sure I understand how this would help with our issue (and EEE). > Am I missing something or is it something unrelated that you would like > to see happening on this driver ? > [snip] I was just tying other phy module to understand the feature. But in order to improve the throughput I tried to integrate blow u-boot commit. commit 3d6af748ebd831524cb22a29433e9092af469ec7 Author: Shengzhou Liu <Shengzhou.Liu@freescale.com> Date: Thu Mar 12 18:54:59 2015 +0800 net/phy: Add support for realtek RTL8211F RTL8211F has different registers from RTL8211E. This patch adds support for RTL8211F PHY which can be found on Freescale's T1023 RDB board. And added the similar functionality to .config_aneg = &rtl8211f_config_aneg, And I seem to have better results in through put with periodic drop but it recovers. ----- odroid@odroid64:~$ iperf3 -c 10.0.0.102 -p 2006 -i 1 -t 100 -V iperf 3.0.11 Linux odroid64 4.9.0-rc5-xc2ml #18 SMP PREEMPT Thu Nov 17 22:56:00 IST 2016 aarch64 aarch64 aarch64 GNU/Linux Time: Thu, 17 Nov 2016 17:35:25 GMT Connecting to host 10.0.0.102, port 2006 Cookie: odroid64.1479404125.404729.3b45146e7 TCP MSS: 1448 (default) [ 4] local 10.0.0.105 port 40238 connected to 10.0.0.102 port 2006 Starting Test: protocol: TCP, 1 streams, 131072 byte blocks, omitting 0 seconds, 100 second test [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 114 MBytes 952 Mbits/sec 0 368 KBytes [ 4] 1.00-2.00 sec 112 MBytes 937 Mbits/sec 0 368 KBytes [ 4] 2.00-3.00 sec 111 MBytes 935 Mbits/sec 0 368 KBytes [ 4] 3.00-4.00 sec 112 MBytes 936 Mbits/sec 0 368 KBytes [ 4] 4.00-5.00 sec 112 MBytes 939 Mbits/sec 0 368 KBytes [ 4] 5.00-6.00 sec 112 MBytes 936 Mbits/sec 0 368 KBytes [ 4] 6.00-7.00 sec 111 MBytes 933 Mbits/sec 0 368 KBytes [ 4] 7.00-8.00 sec 112 MBytes 942 Mbits/sec 0 368 KBytes [ 4] 8.00-9.00 sec 111 MBytes 935 Mbits/sec 0 368 KBytes [ 4] 9.00-10.00 sec 111 MBytes 932 Mbits/sec 0 368 KBytes [ 4] 10.00-11.00 sec 112 MBytes 937 Mbits/sec 0 368 KBytes [ 4] 11.00-12.00 sec 111 MBytes 935 Mbits/sec 0 368 KBytes [ 4] 12.00-13.00 sec 112 MBytes 938 Mbits/sec 0 368 KBytes [ 4] 13.00-14.00 sec 112 MBytes 940 Mbits/sec 0 368 KBytes [ 4] 14.00-15.00 sec 111 MBytes 934 Mbits/sec 0 368 KBytes [ 4] 15.00-16.00 sec 111 MBytes 935 Mbits/sec 0 368 KBytes [ 4] 16.00-17.00 sec 112 MBytes 939 Mbits/sec 0 368 KBytes [ 4] 17.00-18.00 sec 112 MBytes 936 Mbits/sec 0 368 KBytes [ 4] 18.00-19.00 sec 111 MBytes 934 Mbits/sec 0 368 KBytes [ 4] 19.00-20.00 sec 112 MBytes 940 Mbits/sec 0 368 KBytes [ 4] 20.00-21.00 sec 111 MBytes 933 Mbits/sec 0 368 KBytes [ 4] 21.00-22.00 sec 112 MBytes 941 Mbits/sec 0 368 KBytes [ 4] 22.00-23.00 sec 111 MBytes 931 Mbits/sec 0 368 KBytes [ 4] 23.00-24.00 sec 112 MBytes 938 Mbits/sec 0 368 KBytes [ 4] 24.00-25.00 sec 112 MBytes 938 Mbits/sec 0 368 KBytes [ 4] 25.00-26.00 sec 111 MBytes 934 Mbits/sec 0 368 KBytes [ 4] 26.00-27.00 sec 112 MBytes 940 Mbits/sec 0 368 KBytes [ 4] 27.00-28.00 sec 112 MBytes 936 Mbits/sec 0 368 KBytes [ 4] 28.00-29.00 sec 111 MBytes 934 Mbits/sec 0 368 KBytes [ 4] 29.00-30.00 sec 112 MBytes 937 Mbits/sec 0 368 KBytes [ 4] 30.00-31.00 sec 111 MBytes 934 Mbits/sec 0 368 KBytes [ 4] 31.00-32.00 sec 112 MBytes 942 Mbits/sec 0 368 KBytes [ 4] 32.00-33.00 sec 111 MBytes 933 Mbits/sec 0 368 KBytes [ 4] 33.00-34.00 sec 111 MBytes 935 Mbits/sec 0 368 KBytes [ 4] 34.00-35.00 sec 112 MBytes 941 Mbits/sec 0 368 KBytes [ 4] 35.00-36.00 sec 107 MBytes 896 Mbits/sec 0 368 KBytes [ 4] 36.00-37.00 sec 0.00 Bytes 0.00 bits/sec 2 1.41 KBytes [ 4] 37.00-38.00 sec 0.00 Bytes 0.00 bits/sec 1 1.41 KBytes [ 4] 38.00-39.00 sec 0.00 Bytes 0.00 bits/sec 0 1.41 KBytes [ 4] 39.00-40.00 sec 38.0 MBytes 319 Mbits/sec 1 385 KBytes [ 4] 40.00-41.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 41.00-42.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 42.00-43.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 43.00-44.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 44.00-45.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 45.00-46.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 46.00-47.00 sec 111 MBytes 931 Mbits/sec 0 385 KBytes [ 4] 47.00-48.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 48.00-49.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 49.00-50.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 50.00-51.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 51.00-52.00 sec 111 MBytes 934 Mbits/sec 0 385 KBytes [ 4] 52.00-53.00 sec 112 MBytes 941 Mbits/sec 0 385 KBytes [ 4] 53.00-54.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 54.00-55.00 sec 111 MBytes 930 Mbits/sec 0 385 KBytes [ 4] 55.00-56.00 sec 112 MBytes 941 Mbits/sec 0 385 KBytes [ 4] 56.00-57.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 57.00-58.00 sec 111 MBytes 933 Mbits/sec 0 385 KBytes [ 4] 58.00-59.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 59.00-60.00 sec 112 MBytes 940 Mbits/sec 0 385 KBytes [ 4] 60.00-61.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 61.00-62.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 62.00-63.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 63.00-64.00 sec 112 MBytes 938 Mbits/sec 0 385 KBytes [ 4] 64.00-65.00 sec 111 MBytes 932 Mbits/sec 0 385 KBytes [ 4] 65.00-66.00 sec 112 MBytes 940 Mbits/sec 0 385 KBytes [ 4] 66.00-67.00 sec 112 MBytes 938 Mbits/sec 0 385 KBytes [ 4] 67.00-68.00 sec 111 MBytes 934 Mbits/sec 0 385 KBytes [ 4] 68.00-69.00 sec 111 MBytes 933 Mbits/sec 0 385 KBytes [ 4] 69.00-70.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 70.00-71.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 71.00-72.00 sec 112 MBytes 941 Mbits/sec 0 385 KBytes [ 4] 72.00-73.00 sec 111 MBytes 933 Mbits/sec 0 385 KBytes [ 4] 73.00-74.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 74.00-75.00 sec 111 MBytes 934 Mbits/sec 0 385 KBytes [ 4] 75.00-76.00 sec 111 MBytes 934 Mbits/sec 0 385 KBytes [ 4] 76.00-77.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 77.00-78.00 sec 112 MBytes 938 Mbits/sec 0 385 KBytes [ 4] 78.00-79.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 79.00-80.00 sec 111 MBytes 934 Mbits/sec 0 385 KBytes [ 4] 80.00-81.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 81.00-82.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 82.00-83.00 sec 111 MBytes 934 Mbits/sec 0 385 KBytes [ 4] 83.00-84.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 84.00-85.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 85.00-86.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 86.00-87.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 87.00-88.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 88.00-89.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 89.00-90.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 90.00-91.00 sec 112 MBytes 937 Mbits/sec 0 385 KBytes [ 4] 91.00-92.00 sec 111 MBytes 934 Mbits/sec 0 385 KBytes [ 4] 92.00-93.00 sec 112 MBytes 939 Mbits/sec 0 385 KBytes [ 4] 93.00-94.00 sec 111 MBytes 935 Mbits/sec 0 385 KBytes [ 4] 94.00-95.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 95.00-96.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 96.00-97.00 sec 112 MBytes 936 Mbits/sec 0 385 KBytes [ 4] 97.00-98.00 sec 113 MBytes 945 Mbits/sec 0 559 KBytes [ 4] 98.00-99.00 sec 112 MBytes 937 Mbits/sec 0 559 KBytes [ 4] 99.00-100.00 sec 111 MBytes 928 Mbits/sec 0 559 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - Test Complete. Summary Results: [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-100.00 sec 10.5 GBytes 902 Mbits/sec 4 sender [ 4] 0.00-100.00 sec 10.5 GBytes 902 Mbits/sec receiver CPU Utilization: local/sender 5.6% (0.2%u/5.4%s), remote/receiver 17.1% (1.2%u/15.9%s) Can your confirm this at your end. Once confirm I will try to send this as a fix for this issue. -Best Regards Anand Moon
On Thu, 2016-11-17 at 23:30 +0530, Anand Moon wrote: > Hi Jerone, > > > > How about adding callback functionality for .soft_reset to handle > > > BMCR > > > where we update the Auto-Negotiation for the phy, > > > as per the datasheet of the rtl8211f. I think BMCR is already pretty well handled by the genphy, don't you think ? > > > > I'm not sure I understand how this would help with our issue (and > > EEE). > > Am I missing something or is it something unrelated that you would > > like > > to see happening on this driver ? > > > [snip] > > I was just tying other phy module to understand the feature. > But in order to improve the throughput I tried to integrate blow u- > boot commit. > > commit 3d6af748ebd831524cb22a29433e9092af469ec7 > Author: Shengzhou Liu <Shengzhou.Liu@freescale.com> > Date: Thu Mar 12 18:54:59 2015 +0800 > > net/phy: Add support for realtek RTL8211F > > RTL8211F has different registers from RTL8211E. > This patch adds support for RTL8211F PHY which > can be found on Freescale's T1023 RDB board. > > And added the similar functionality to .config_aneg = > &rtl8211f_config_aneg, > I assume this is the commit you are referring to : http://git.denx.de/?p=u-boot.git;a=commit;h=3d6af748ebd831524cb22a29433 e9092af469ec7 I tried looking a this particular commit and the other ones in realtek.c history of u-boot. I don't really see what it does that linux is not already doing. > And I seem to have better results in through put with periodic drop > but it recovers. > ----- > odroid@odroid64:~$ iperf3 -c 10.0.0.102 -p 2006 -i 1 -t 100 -V > iperf 3.0.11 > Linux odroid64 4.9.0-rc5-xc2ml #18 SMP PREEMPT Thu Nov 17 22:56:00 [...] > > Test Complete. Summary Results: > [ ID] Interval Transfer Bandwidth Retr > [ 4] 0.00-100.00 sec 10.5 GBytes 902 > Mbits/sec 4 sender > [ 4] 0.00-100.00 sec 10.5 GBytes 902 > Mbits/sec receiver > CPU Utilization: local/sender 5.6% (0.2%u/5.4%s), remote/receiver > 17.1% (1.2%u/15.9%s) > That's the kind of throughput we have on the C2 once the link is reliable (with EEE switch off for GbE) > Can your confirm this at your end. > Once confirm I will try to send this as a fix for this issue. > I'm testing the code to disable EEE in a generic way. I'll post the RFC for it asap. > -Best Regards > Anand Moon
diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c index aadd6e9f54ad..77235fd5faaf 100644 --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -15,6 +15,12 @@ */ #include <linux/phy.h> #include <linux/module.h> +#include <linux/of.h> + +struct rtl8211x_phy_priv { + bool eee_1000t_disable; + bool eee_100tx_disable; +}; #define RTL821x_PHYSR 0x11 #define RTL821x_PHYSR_DUPLEX 0x2000 @@ -93,12 +99,44 @@ static int rtl8211f_config_intr(struct phy_device *phydev) return err; } +static void rtl8211x_clear_eee_adv(struct phy_device *phydev) +{ + struct rtl8211x_phy_priv *priv = phydev->priv; + u16 val; + + if (priv->eee_1000t_disable || priv->eee_100tx_disable) { + val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, + MDIO_MMD_AN); + + if (priv->eee_1000t_disable) + val &= ~MDIO_AN_EEE_ADV_1000T; + if (priv->eee_100tx_disable) + val &= ~MDIO_AN_EEE_ADV_100TX; + + phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, + MDIO_MMD_AN, val); + } +} + +static int rtl8211x_config_init(struct phy_device *phydev) +{ + int ret; + + ret = genphy_config_init(phydev); + if (ret < 0) + return ret; + + rtl8211x_clear_eee_adv(phydev); + + return 0; +} + static int rtl8211f_config_init(struct phy_device *phydev) { int ret; u16 reg; - ret = genphy_config_init(phydev); + ret = rtl8211x_config_init(phydev); if (ret < 0) return ret; @@ -115,6 +153,26 @@ static int rtl8211f_config_init(struct phy_device *phydev) return 0; } +static int rtl8211x_phy_probe(struct phy_device *phydev) +{ + struct device *dev = &phydev->mdio.dev; + struct device_node *of_node = dev->of_node; + struct rtl8211x_phy_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->eee_1000t_disable = + of_property_read_bool(of_node, "realtek,disable-eee-1000t"); + priv->eee_100tx_disable = + of_property_read_bool(of_node, "realtek,disable-eee-100tx"); + + phydev->priv = priv; + + return 0; +} + static struct phy_driver realtek_drvs[] = { { .phy_id = 0x00008201, @@ -140,7 +198,9 @@ static struct phy_driver realtek_drvs[] = { .phy_id_mask = 0x001fffff, .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_INTERRUPT, + .probe = &rtl8211x_phy_probe, .config_aneg = genphy_config_aneg, + .config_init = &rtl8211x_config_init, .read_status = genphy_read_status, .ack_interrupt = rtl821x_ack_interrupt, .config_intr = rtl8211e_config_intr, @@ -152,7 +212,9 @@ static struct phy_driver realtek_drvs[] = { .phy_id_mask = 0x001fffff, .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_INTERRUPT, + .probe = &rtl8211x_phy_probe, .config_aneg = &genphy_config_aneg, + .config_init = &rtl8211x_config_init, .read_status = &genphy_read_status, .ack_interrupt = &rtl821x_ack_interrupt, .config_intr = &rtl8211e_config_intr, @@ -164,6 +226,7 @@ static struct phy_driver realtek_drvs[] = { .phy_id_mask = 0x001fffff, .features = PHY_GBIT_FEATURES, .flags = PHY_HAS_INTERRUPT, + .probe = &rtl8211x_phy_probe, .config_aneg = &genphy_config_aneg, .config_init = &rtl8211f_config_init, .read_status = &genphy_read_status,