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Message-ID: <5033836C.2010306@st.com>
Date: Tue, 21 Aug 2012 14:47:40 +0200
From: Giuseppe CAVALLARO <peppe.cavallaro@...com>
To: Bruce Allan <bruce.w.allan@...el.com>
Cc: netdev@...r.kernel.org
Subject: Re: [net-next PATCH] mdio: translation of MMD EEE registers to/from
ethtool settings
On 8/20/2012 4:55 PM, Bruce Allan wrote:
> The helper functions which translate IEEE MDIO Manageable Device (MMD)
> Energy-Efficient Ethernet (EEE) registers 3.20, 7.60 and 7.61 to and from
> the comparable ethtool supported/advertised settings will be needed by
> drivers other than those in PHYLIB (e.g. e1000e in a follow-on patch).
>
> In the same fashion as similar translation functions in linux/mii.h, move
> these functions from the PHYLIB core to the linux/mdio.h header file so the
> code will not have to be duplicated in each driver needing MMD-to-ethtool
> (and vice-versa) translations. The function and some variable names have
> been renamed to be more descriptive.
>
> Not tested on the only hardware that currently calls the related functions,
> stmmac, because I don't have access to any. Has been compile tested and
> the translations have been tested on a locally modified version of e1000e.
>
> Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
> Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
I did some tests on my side with the stmmac and I've not seen any issues
on EEE. Also the patch looks fine to me.
Peppe
> ---
>
> drivers/net/phy/phy.c | 74 ++++----------------------------------------
> include/linux/mdio.h | 83 +++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 90 insertions(+), 67 deletions(-)
>
> diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
> index 7ca2ff9..ef9ea92 100644
> --- a/drivers/net/phy/phy.c
> +++ b/drivers/net/phy/phy.c
> @@ -1035,66 +1035,6 @@ static void phy_write_mmd_indirect(struct mii_bus *bus, int prtad, int devad,
> bus->write(bus, addr, MII_MMD_DATA, data);
> }
>
> -static u32 phy_eee_to_adv(u16 eee_adv)
> -{
> - u32 adv = 0;
> -
> - if (eee_adv & MDIO_EEE_100TX)
> - adv |= ADVERTISED_100baseT_Full;
> - if (eee_adv & MDIO_EEE_1000T)
> - adv |= ADVERTISED_1000baseT_Full;
> - if (eee_adv & MDIO_EEE_10GT)
> - adv |= ADVERTISED_10000baseT_Full;
> - if (eee_adv & MDIO_EEE_1000KX)
> - adv |= ADVERTISED_1000baseKX_Full;
> - if (eee_adv & MDIO_EEE_10GKX4)
> - adv |= ADVERTISED_10000baseKX4_Full;
> - if (eee_adv & MDIO_EEE_10GKR)
> - adv |= ADVERTISED_10000baseKR_Full;
> -
> - return adv;
> -}
> -
> -static u32 phy_eee_to_supported(u16 eee_caported)
> -{
> - u32 supported = 0;
> -
> - if (eee_caported & MDIO_EEE_100TX)
> - supported |= SUPPORTED_100baseT_Full;
> - if (eee_caported & MDIO_EEE_1000T)
> - supported |= SUPPORTED_1000baseT_Full;
> - if (eee_caported & MDIO_EEE_10GT)
> - supported |= SUPPORTED_10000baseT_Full;
> - if (eee_caported & MDIO_EEE_1000KX)
> - supported |= SUPPORTED_1000baseKX_Full;
> - if (eee_caported & MDIO_EEE_10GKX4)
> - supported |= SUPPORTED_10000baseKX4_Full;
> - if (eee_caported & MDIO_EEE_10GKR)
> - supported |= SUPPORTED_10000baseKR_Full;
> -
> - return supported;
> -}
> -
> -static u16 phy_adv_to_eee(u32 adv)
> -{
> - u16 reg = 0;
> -
> - if (adv & ADVERTISED_100baseT_Full)
> - reg |= MDIO_EEE_100TX;
> - if (adv & ADVERTISED_1000baseT_Full)
> - reg |= MDIO_EEE_1000T;
> - if (adv & ADVERTISED_10000baseT_Full)
> - reg |= MDIO_EEE_10GT;
> - if (adv & ADVERTISED_1000baseKX_Full)
> - reg |= MDIO_EEE_1000KX;
> - if (adv & ADVERTISED_10000baseKX4_Full)
> - reg |= MDIO_EEE_10GKX4;
> - if (adv & ADVERTISED_10000baseKR_Full)
> - reg |= MDIO_EEE_10GKR;
> -
> - return reg;
> -}
> -
> /**
> * phy_init_eee - init and check the EEE feature
> * @phydev: target phy_device struct
> @@ -1132,7 +1072,7 @@ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
> if (eee_cap < 0)
> return eee_cap;
>
> - cap = phy_eee_to_supported(eee_cap);
> + cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
> if (!cap)
> goto eee_exit;
>
> @@ -1149,8 +1089,8 @@ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
> if (eee_adv < 0)
> return eee_adv;
>
> - adv = phy_eee_to_adv(eee_adv);
> - lp = phy_eee_to_adv(eee_lp);
> + adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
> + lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
> idx = phy_find_setting(phydev->speed, phydev->duplex);
> if ((lp & adv & settings[idx].setting))
> goto eee_exit;
> @@ -1210,21 +1150,21 @@ int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
> MDIO_MMD_PCS, phydev->addr);
> if (val < 0)
> return val;
> - data->supported = phy_eee_to_supported(val);
> + data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
>
> /* Get advertisement EEE */
> val = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV,
> MDIO_MMD_AN, phydev->addr);
> if (val < 0)
> return val;
> - data->advertised = phy_eee_to_adv(val);
> + data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
>
> /* Get LP advertisement EEE */
> val = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_LPABLE,
> MDIO_MMD_AN, phydev->addr);
> if (val < 0)
> return val;
> - data->lp_advertised = phy_eee_to_adv(val);
> + data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
>
> return 0;
> }
> @@ -1241,7 +1181,7 @@ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
> {
> int val;
>
> - val = phy_adv_to_eee(data->advertised);
> + val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
> phy_write_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV, MDIO_MMD_AN,
> phydev->addr, val);
>
> diff --git a/include/linux/mdio.h b/include/linux/mdio.h
> index 7cccafe..6c40684 100644
> --- a/include/linux/mdio.h
> +++ b/include/linux/mdio.h
> @@ -377,5 +377,88 @@ static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
> extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
> struct mii_ioctl_data *mii_data, int cmd);
>
> +/**
> + * mmd_eee_cap_to_ethtool_sup_t
> + * @eee_cap: value of the MMD EEE Capability register
> + *
> + * A small helper function that translates MMD EEE Capability (3.20) bits
> + * to ethtool supported settings.
> + */
> +static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
> +{
> + u32 supported = 0;
> +
> + if (eee_cap & MDIO_EEE_100TX)
> + supported |= SUPPORTED_100baseT_Full;
> + if (eee_cap & MDIO_EEE_1000T)
> + supported |= SUPPORTED_1000baseT_Full;
> + if (eee_cap & MDIO_EEE_10GT)
> + supported |= SUPPORTED_10000baseT_Full;
> + if (eee_cap & MDIO_EEE_1000KX)
> + supported |= SUPPORTED_1000baseKX_Full;
> + if (eee_cap & MDIO_EEE_10GKX4)
> + supported |= SUPPORTED_10000baseKX4_Full;
> + if (eee_cap & MDIO_EEE_10GKR)
> + supported |= SUPPORTED_10000baseKR_Full;
> +
> + return supported;
> +}
> +
> +/**
> + * mmd_eee_adv_to_ethtool_adv_t
> + * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
> + *
> + * A small helper function that translates the MMD EEE Advertisment (7.60)
> + * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
> + * settings.
> + */
> +static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
> +{
> + u32 adv = 0;
> +
> + if (eee_adv & MDIO_EEE_100TX)
> + adv |= ADVERTISED_100baseT_Full;
> + if (eee_adv & MDIO_EEE_1000T)
> + adv |= ADVERTISED_1000baseT_Full;
> + if (eee_adv & MDIO_EEE_10GT)
> + adv |= ADVERTISED_10000baseT_Full;
> + if (eee_adv & MDIO_EEE_1000KX)
> + adv |= ADVERTISED_1000baseKX_Full;
> + if (eee_adv & MDIO_EEE_10GKX4)
> + adv |= ADVERTISED_10000baseKX4_Full;
> + if (eee_adv & MDIO_EEE_10GKR)
> + adv |= ADVERTISED_10000baseKR_Full;
> +
> + return adv;
> +}
> +
> +/**
> + * ethtool_adv_to_mmd_eee_adv_t
> + * @adv: the ethtool advertisement settings
> + *
> + * A small helper function that translates ethtool advertisement settings
> + * to EEE advertisements for the MMD EEE Advertisement (7.60) and
> + * MMD EEE Link Partner Ability (7.61) registers.
> + */
> +static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
> +{
> + u16 reg = 0;
> +
> + if (adv & ADVERTISED_100baseT_Full)
> + reg |= MDIO_EEE_100TX;
> + if (adv & ADVERTISED_1000baseT_Full)
> + reg |= MDIO_EEE_1000T;
> + if (adv & ADVERTISED_10000baseT_Full)
> + reg |= MDIO_EEE_10GT;
> + if (adv & ADVERTISED_1000baseKX_Full)
> + reg |= MDIO_EEE_1000KX;
> + if (adv & ADVERTISED_10000baseKX4_Full)
> + reg |= MDIO_EEE_10GKX4;
> + if (adv & ADVERTISED_10000baseKR_Full)
> + reg |= MDIO_EEE_10GKR;
> +
> + return reg;
> +}
> +
> #endif /* __KERNEL__ */
> #endif /* __LINUX_MDIO_H__ */
>
> --
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