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Date: Sat, 11 Feb 2023 08:41:09 +0100
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Woojung Huh <woojung.huh@...rochip.com>,
UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Wei Fang <wei.fang@....com>,
Heiner Kallweit <hkallweit1@...il.com>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
Arun.Ramadoss@...rochip.com, intel-wired-lan@...ts.osuosl.org
Subject: [PATCH net-next v8 5/9] net: phy: add genphy_c45_ethtool_get/set_eee() support
Add replacement for phy_ethtool_get/set_eee() functions.
Current phy_ethtool_get/set_eee() implementation is great and it is
possible to make it even better:
- this functionality is for devices implementing parts of IEEE 802.3
specification beyond Clause 22. The better place for this code is
phy-c45.c
- currently it is able to do read/write operations on PHYs with
different abilities to not existing registers. It is better to
use stored supported_eee abilities to avoid false read/write
operations.
- the eee_active detection will provide wrong results on not supported
link modes. It is better to validate speed/duplex properties against
supported EEE link modes.
- it is able to support only limited amount of link modes. We have more
EEE link modes...
By refactoring this code I address most of this point except of the last
one. Adding additional EEE link modes will need more work.
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
drivers/net/phy/phy-c45.c | 238 ++++++++++++++++++++++++++++++++++++++
include/linux/mdio.h | 58 ++++++++++
include/linux/phy.h | 7 ++
include/uapi/linux/mdio.h | 8 ++
4 files changed, 311 insertions(+)
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index 2d10d22e7684..b4910c4c21d7 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -661,6 +661,129 @@ int genphy_c45_read_mdix(struct phy_device *phydev)
}
EXPORT_SYMBOL_GPL(genphy_c45_read_mdix);
+/**
+ * genphy_c45_write_eee_adv - write advertised EEE link modes
+ * @phydev: target phy_device struct
+ * @adv: the linkmode advertisement settings
+ */
+int genphy_c45_write_eee_adv(struct phy_device *phydev, unsigned long *adv)
+{
+ int val, changed;
+
+ if (linkmode_intersects(phydev->supported, PHY_EEE_CAP1_FEATURES)) {
+ val = linkmode_to_mii_eee_cap1_t(adv);
+
+ /* In eee_broken_modes are stored MDIO_AN_EEE_ADV specific raw
+ * register values.
+ */
+ val &= ~phydev->eee_broken_modes;
+
+ /* IEEE 802.3-2018 45.2.7.13 EEE advertisement 1
+ * (Register 7.60)
+ */
+ val = phy_modify_mmd_changed(phydev, MDIO_MMD_AN,
+ MDIO_AN_EEE_ADV,
+ MDIO_EEE_100TX | MDIO_EEE_1000T |
+ MDIO_EEE_10GT | MDIO_EEE_1000KX |
+ MDIO_EEE_10GKX4 | MDIO_EEE_10GKR,
+ val);
+ if (val < 0)
+ return val;
+ if (val > 0)
+ changed = 1;
+ }
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
+ phydev->supported_eee)) {
+ val = linkmode_adv_to_mii_10base_t1_t(adv);
+ /* IEEE 802.3cg-2019 45.2.7.25 10BASE-T1 AN control register
+ * (Register 7.526)
+ */
+ val = phy_modify_mmd_changed(phydev, MDIO_MMD_AN,
+ MDIO_AN_10BT1_AN_CTRL,
+ MDIO_AN_10BT1_AN_CTRL_ADV_EEE_T1L,
+ val);
+ if (val < 0)
+ return val;
+ if (val > 0)
+ changed = 1;
+ }
+
+ return changed;
+}
+
+/**
+ * genphy_c45_read_eee_adv - read advertised EEE link modes
+ * @phydev: target phy_device struct
+ * @adv: the linkmode advertisement status
+ */
+static int genphy_c45_read_eee_adv(struct phy_device *phydev,
+ unsigned long *adv)
+{
+ int val;
+
+ if (linkmode_intersects(phydev->supported, PHY_EEE_CAP1_FEATURES)) {
+ /* IEEE 802.3-2018 45.2.7.13 EEE advertisement 1
+ * (Register 7.60)
+ */
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
+ if (val < 0)
+ return val;
+
+ mii_eee_cap1_mod_linkmode_t(adv, val);
+ }
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
+ phydev->supported_eee)) {
+ /* IEEE 802.3cg-2019 45.2.7.25 10BASE-T1 AN control register
+ * (Register 7.526)
+ */
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10BT1_AN_CTRL);
+ if (val < 0)
+ return val;
+
+ mii_10base_t1_adv_mod_linkmode_t(adv, val);
+ }
+
+ return 0;
+}
+
+/**
+ * genphy_c45_read_eee_lpa - read advertised LP EEE link modes
+ * @phydev: target phy_device struct
+ * @lpa: the linkmode LP advertisement status
+ */
+static int genphy_c45_read_eee_lpa(struct phy_device *phydev,
+ unsigned long *lpa)
+{
+ int val;
+
+ if (linkmode_intersects(phydev->supported, PHY_EEE_CAP1_FEATURES)) {
+ /* IEEE 802.3-2018 45.2.7.14 EEE link partner ability 1
+ * (Register 7.61)
+ */
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
+ if (val < 0)
+ return val;
+
+ mii_eee_cap1_mod_linkmode_t(lpa, val);
+ }
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
+ phydev->supported_eee)) {
+ /* IEEE 802.3cg-2019 45.2.7.26 10BASE-T1 AN status register
+ * (Register 7.527)
+ */
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10BT1_AN_STAT);
+ if (val < 0)
+ return val;
+
+ mii_10base_t1_adv_mod_linkmode_t(lpa, val);
+ }
+
+ return 0;
+}
+
/**
* genphy_c45_read_eee_cap1 - read supported EEE link modes from register 3.20
* @phydev: target phy_device struct
@@ -1194,6 +1317,121 @@ int genphy_c45_plca_get_status(struct phy_device *phydev,
}
EXPORT_SYMBOL_GPL(genphy_c45_plca_get_status);
+/**
+ * genphy_c45_eee_is_active - get EEE status
+ * @phydev: target phy_device struct
+ * @adv: variable to store advertised linkmodes
+ * @lp: variable to store LP advertised linkmodes
+ * @is_enabled: variable to store EEE enabled/disabled configuration value
+ *
+ * Description: this function will read local and link partner PHY
+ * advertisements. Compare them return current EEE state.
+ */
+int genphy_c45_eee_is_active(struct phy_device *phydev, unsigned long *adv,
+ unsigned long *lp, bool *is_enabled)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp_adv) = {};
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp_lp) = {};
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
+ bool eee_enabled, eee_active;
+ int ret;
+
+ ret = genphy_c45_read_eee_adv(phydev, tmp_adv);
+ if (ret)
+ return ret;
+
+ ret = genphy_c45_read_eee_lpa(phydev, tmp_lp);
+ if (ret)
+ return ret;
+
+ eee_enabled = !linkmode_empty(tmp_adv);
+ linkmode_and(common, tmp_adv, tmp_lp);
+ if (eee_enabled && !linkmode_empty(common))
+ eee_active = phy_check_valid(phydev->speed, phydev->duplex,
+ common);
+ else
+ eee_active = false;
+
+ if (adv)
+ linkmode_copy(adv, tmp_adv);
+ if (lp)
+ linkmode_copy(lp, tmp_lp);
+ if (is_enabled)
+ *is_enabled = eee_enabled;
+
+ return eee_active;
+}
+EXPORT_SYMBOL(genphy_c45_eee_is_active);
+
+/**
+ * genphy_c45_ethtool_get_eee - get EEE supported and status
+ * @phydev: target phy_device struct
+ * @data: ethtool_eee data
+ *
+ * Description: it reports the Supported/Advertisement/LP Advertisement
+ * capabilities.
+ */
+int genphy_c45_ethtool_get_eee(struct phy_device *phydev,
+ struct ethtool_eee *data)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(adv) = {};
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(lp) = {};
+ bool overflow = false, is_enabled;
+ int ret;
+
+ ret = genphy_c45_eee_is_active(phydev, adv, lp, &is_enabled);
+ if (ret < 0)
+ return ret;
+
+ data->eee_enabled = is_enabled;
+ data->eee_active = ret;
+
+ if (!ethtool_convert_link_mode_to_legacy_u32(&data->supported,
+ phydev->supported_eee))
+ overflow = true;
+ if (!ethtool_convert_link_mode_to_legacy_u32(&data->advertised, adv))
+ overflow = true;
+ if (!ethtool_convert_link_mode_to_legacy_u32(&data->lp_advertised, lp))
+ overflow = true;
+
+ if (overflow)
+ phydev_warn(phydev, "Not all supported or advertised EEE link modes were passed to the user space\n");
+
+ return 0;
+}
+EXPORT_SYMBOL(genphy_c45_ethtool_get_eee);
+
+/**
+ * genphy_c45_ethtool_set_eee - get EEE supported and status
+ * @phydev: target phy_device struct
+ * @data: ethtool_eee data
+ *
+ * Description: it reportes the Supported/Advertisement/LP Advertisement
+ * capabilities.
+ */
+int genphy_c45_ethtool_set_eee(struct phy_device *phydev,
+ struct ethtool_eee *data)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(adv) = {};
+ int ret;
+
+ if (data->eee_enabled) {
+ if (data->advertised)
+ adv[0] = data->advertised;
+ else
+ linkmode_copy(adv, phydev->supported_eee);
+ }
+
+ ret = genphy_c45_write_eee_adv(phydev, adv);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ return phy_restart_aneg(phydev);
+
+ return 0;
+}
+EXPORT_SYMBOL(genphy_c45_ethtool_set_eee);
+
struct phy_driver genphy_c45_driver = {
.phy_id = 0xffffffff,
.phy_id_mask = 0xffffffff,
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index e75583f5d967..27013d6bf24a 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -428,6 +428,64 @@ static inline void mii_eee_cap1_mod_linkmode_t(unsigned long *adv, u32 val)
adv, val & MDIO_EEE_10GKR);
}
+/**
+ * linkmode_to_mii_eee_cap1_t()
+ * @adv: the linkmode advertisement settings
+ *
+ * A function that translates linkmode to value for IEEE 802.3-2018 45.2.7.13
+ * "EEE advertisement 1" register (7.60)
+ */
+static inline u32 linkmode_to_mii_eee_cap1_t(unsigned long *adv)
+{
+ u32 result = 0;
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, adv))
+ result |= MDIO_EEE_100TX;
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, adv))
+ result |= MDIO_EEE_1000T;
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, adv))
+ result |= MDIO_EEE_10GT;
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, adv))
+ result |= MDIO_EEE_1000KX;
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, adv))
+ result |= MDIO_EEE_10GKX4;
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, adv))
+ result |= MDIO_EEE_10GKR;
+
+ return result;
+}
+
+/**
+ * mii_10base_t1_adv_mod_linkmode_t()
+ * @adv: linkmode advertisement settings
+ * @val: register value
+ *
+ * A function that translates IEEE 802.3cg-2019 45.2.7.26 "10BASE-T1 AN status"
+ * register (7.527) value to the linkmode.
+ */
+static inline void mii_10base_t1_adv_mod_linkmode_t(unsigned long *adv, u16 val)
+{
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
+ adv, val & MDIO_AN_10BT1_AN_CTRL_ADV_EEE_T1L);
+}
+
+/**
+ * linkmode_adv_to_mii_10base_t1_t()
+ * @adv: linkmode advertisement settings
+ *
+ * A function that translates the linkmode to IEEE 802.3cg-2019 45.2.7.25
+ * "10BASE-T1 AN control" register (7.526) value.
+ */
+static inline u32 linkmode_adv_to_mii_10base_t1_t(unsigned long *adv)
+{
+ u32 result = 0;
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, adv))
+ result |= MDIO_AN_10BT1_AN_CTRL_ADV_EEE_T1L;
+
+ return result;
+}
+
int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 7a8e541de3f3..727bff531a14 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1758,6 +1758,13 @@ int genphy_c45_plca_set_cfg(struct phy_device *phydev,
const struct phy_plca_cfg *plca_cfg);
int genphy_c45_plca_get_status(struct phy_device *phydev,
struct phy_plca_status *plca_st);
+int genphy_c45_eee_is_active(struct phy_device *phydev, unsigned long *adv,
+ unsigned long *lp, bool *is_enabled);
+int genphy_c45_ethtool_get_eee(struct phy_device *phydev,
+ struct ethtool_eee *data);
+int genphy_c45_ethtool_set_eee(struct phy_device *phydev,
+ struct ethtool_eee *data);
+int genphy_c45_write_eee_adv(struct phy_device *phydev, unsigned long *adv);
/* Generic C45 PHY driver */
extern struct phy_driver genphy_c45_driver;
diff --git a/include/uapi/linux/mdio.h b/include/uapi/linux/mdio.h
index 75b7257a51e1..256b463e47a6 100644
--- a/include/uapi/linux/mdio.h
+++ b/include/uapi/linux/mdio.h
@@ -79,6 +79,8 @@
#define MDIO_AN_T1_LP_L 517 /* BASE-T1 AN LP Base Page ability register [15:0] */
#define MDIO_AN_T1_LP_M 518 /* BASE-T1 AN LP Base Page ability register [31:16] */
#define MDIO_AN_T1_LP_H 519 /* BASE-T1 AN LP Base Page ability register [47:32] */
+#define MDIO_AN_10BT1_AN_CTRL 526 /* 10BASE-T1 AN control register */
+#define MDIO_AN_10BT1_AN_STAT 527 /* 10BASE-T1 AN status register */
#define MDIO_PMA_PMD_BT1_CTRL 2100 /* BASE-T1 PMA/PMD control register */
/* LASI (Link Alarm Status Interrupt) registers, defined by XENPAK MSA. */
@@ -340,6 +342,12 @@
#define MDIO_AN_T1_LP_H_10L_TX_HI_REQ 0x1000 /* 10BASE-T1L High Level LP Transmit Request */
#define MDIO_AN_T1_LP_H_10L_TX_HI 0x2000 /* 10BASE-T1L High Level LP Transmit Ability */
+/* 10BASE-T1 AN control register */
+#define MDIO_AN_10BT1_AN_CTRL_ADV_EEE_T1L 0x4000 /* 10BASE-T1L EEE ability advertisement */
+
+/* 10BASE-T1 AN status register */
+#define MDIO_AN_10BT1_AN_STAT_LPA_EEE_T1L 0x4000 /* 10BASE-T1L LP EEE ability advertisement */
+
/* BASE-T1 PMA/PMD control register */
#define MDIO_PMA_PMD_BT1_CTRL_CFG_MST 0x4000 /* MASTER-SLAVE config value */
--
2.30.2
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