[PATCH net-next V5 5/5] net: lan743x: Add support to ethtool phylink get and set settings

Raju Lakkaraju
2024-09-04T09:11:17Z

Add support to ethtool phylink functions:
- get/set settings like speed, duplex etc
- get/set the wake-on-lan (WOL)
- get/set the energy-efficient ethernet (EEE)
- get/set the pause

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
---
Change List:
============
V4 -> V5:
- Remove the "phydev->eee_enabled" check to update the MAC EEE
enable/disable
- Call lan743x_mac_eee_enable() with true after update tx_lpi_timer.
- Add phy_support_eee() to initialize the EEE flags
V3 -> V4:
- Remove the EEE private variables from LAN743x adapter strcture and fix the
EEE's set/get functions
- Change lan743x_set_eee( ) to lan743x_mac_eee_enable( )
- Fix the EEE's tx lpi counter update
V2 -> V3:
- No change
V1 -> V2:
- Fix the phylink changes

.../net/ethernet/microchip/lan743x_ethtool.c | 119 ++++++------------
drivers/net/ethernet/microchip/lan743x_main.c | 22 ++++
drivers/net/ethernet/microchip/lan743x_main.h | 1 +
3 files changed, 63 insertions(+), 79 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c
index 3a63ec091413..574b492b25c3 100644
--- a/drivers/net/ethernet/microchip/lan743x_ethtool.c
+++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c
@@ -1058,61 +1058,51 @@ static int lan743x_ethtool_get_eee(struct net_device *netdev,
struct ethtool_keee *eee)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
- struct phy_device *phydev = netdev->phydev;
- u32 buf;
- int ret;

- if (!phydev)
- return -EIO;
- if (!phydev->drv) {
- netif_err(adapter, drv, adapter->netdev,
- "Missing PHY Driver\n");
- return -EIO;
- }
+ eee->tx_lpi_timer = lan743x_csr_read(adapter,
+ MAC_EEE_TX_LPI_REQ_DLY_CNT);

- ret = phy_ethtool_get_eee(phydev, eee);
- if (ret < 0)
- return ret;
+ return phylink_ethtool_get_eee(adapter->phylink, eee);
+}

- buf = lan743x_csr_read(adapter, MAC_CR);
- if (buf & MAC_CR_EEE_EN_) {
- /* EEE_TX_LPI_REQ_DLY & tx_lpi_timer are same uSec unit */
- buf = lan743x_csr_read(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT);
- eee->tx_lpi_timer = buf;
- } else {
- eee->tx_lpi_timer = 0;
+static int lan743x_ethtool_set_eee(struct net_device *netdev,
+ struct ethtool_keee *eee)
+{
+ struct lan743x_adapter *adapter = netdev_priv(netdev);
+ u32 tx_lpi_timer;
+
+ tx_lpi_timer = lan743x_csr_read(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT);
+ if (tx_lpi_timer != eee->tx_lpi_timer) {
+ /* Software should only change this field when Energy Efficient
+ * Ethernet Enable (EEEEN) is cleared.
+ * This function will trigger an autonegotiation restart and
+ * eee will be reenabled during link up if eee was negotiated.
+ */
+ lan743x_mac_eee_enable(adapter, false);
+ lan743x_csr_write(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT,
+ eee->tx_lpi_timer);
+ lan743x_mac_eee_enable(adapter, true);
}

- return 0;
+ return phylink_ethtool_set_eee(adapter->phylink, eee);
}

-static int lan743x_ethtool_set_eee(struct net_device *netdev,
- struct ethtool_keee *eee)
+static int
+lan743x_ethtool_set_link_ksettings(struct net_device *netdev,
+ const struct ethtool_link_ksettings *cmd)
{
- struct lan743x_adapter *adapter;
- struct phy_device *phydev;
- u32 buf = 0;
+ struct lan743x_adapter *adapter = netdev_priv(netdev);

- if (!netdev)
- return -EINVAL;
- adapter = netdev_priv(netdev);
- if (!adapter)
- return -EINVAL;
- phydev = netdev->phydev;
- if (!phydev)
- return -EIO;
- if (!phydev->drv) {
- netif_err(adapter, drv, adapter->netdev,
- "Missing PHY Driver\n");
- return -EIO;
- }
+ return phylink_ethtool_ksettings_set(adapter->phylink, cmd);
+}

- if (eee->eee_enabled) {
- buf = (u32)eee->tx_lpi_timer;
- lan743x_csr_write(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT, buf);
- }
+static int
+lan743x_ethtool_get_link_ksettings(struct net_device *netdev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct lan743x_adapter *adapter = netdev_priv(netdev);

- return phy_ethtool_set_eee(phydev, eee);
+ return phylink_ethtool_ksettings_get(adapter->phylink, cmd);
}

#ifdef CONFIG_PM
@@ -1124,8 +1114,7 @@ static void lan743x_ethtool_get_wol(struct net_device *netdev,
wol->supported = 0;
wol->wolopts = 0;

- if (netdev->phydev)
- phy_ethtool_get_wol(netdev->phydev, wol);
+ phylink_ethtool_get_wol(adapter->phylink, wol);

if (wol->supported != adapter->phy_wol_supported)
netif_warn(adapter, drv, adapter->netdev,
@@ -1166,7 +1155,7 @@ static int lan743x_ethtool_set_wol(struct net_device *netdev,
!(adapter->phy_wol_supported & WAKE_MAGICSECURE))
phy_wol.wolopts &= ~WAKE_MAGIC;

- ret = phy_ethtool_set_wol(netdev->phydev, &phy_wol);
+ ret = phylink_ethtool_set_wol(adapter->phylink, wol);
if (ret && (ret != -EOPNOTSUPP))
return ret;

@@ -1355,44 +1344,16 @@ static void lan743x_get_pauseparam(struct net_device *dev,
struct ethtool_pauseparam *pause)
{
struct lan743x_adapter *adapter = netdev_priv(dev);
- struct lan743x_phy *phy = &adapter->phy;

- if (phy->fc_request_control & FLOW_CTRL_TX)
- pause->tx_pause = 1;
- if (phy->fc_request_control & FLOW_CTRL_RX)
- pause->rx_pause = 1;
- pause->autoneg = phy->fc_autoneg;
+ phylink_ethtool_get_pauseparam(adapter->phylink, pause);
}

static int lan743x_set_pauseparam(struct net_device *dev,
struct ethtool_pauseparam *pause)
{
struct lan743x_adapter *adapter = netdev_priv(dev);
- struct phy_device *phydev = dev->phydev;
- struct lan743x_phy *phy = &adapter->phy;

- if (!phydev)
- return -ENODEV;
-
- if (!phy_validate_pause(phydev, pause))
- return -EINVAL;
-
- phy->fc_request_control = 0;
- if (pause->rx_pause)
- phy->fc_request_control |= FLOW_CTRL_RX;
-
- if (pause->tx_pause)
- phy->fc_request_control |= FLOW_CTRL_TX;
-
- phy->fc_autoneg = pause->autoneg;
-
- if (pause->autoneg == AUTONEG_DISABLE)
- lan743x_mac_flow_ctrl_set_enables(adapter, pause->tx_pause,
- pause->rx_pause);
- else
- phy_set_asym_pause(phydev, pause->rx_pause, pause->tx_pause);
-
- return 0;
+ return phylink_ethtool_set_pauseparam(adapter->phylink, pause);
}

const struct ethtool_ops lan743x_ethtool_ops = {
@@ -1417,8 +1378,8 @@ const struct ethtool_ops lan743x_ethtool_ops = {
.get_ts_info = lan743x_ethtool_get_ts_info,
.get_eee = lan743x_ethtool_get_eee,
.set_eee = lan743x_ethtool_set_eee,
- .get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_link_ksettings = lan743x_ethtool_get_link_ksettings,
+ .set_link_ksettings = lan743x_ethtool_set_link_ksettings,
.get_regs_len = lan743x_get_regs_len,
.get_regs = lan743x_get_regs,
.get_pauseparam = lan743x_get_pauseparam,
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 2da05c50fe53..ff78239eb121 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -2966,6 +2966,18 @@ static int lan743x_phylink_2500basex_config(struct lan743x_adapter *adapter)
return lan743x_pcs_power_reset(adapter);
}

+void lan743x_mac_eee_enable(struct lan743x_adapter *adapter, bool enable)
+{
+ u32 mac_cr;
+
+ mac_cr = lan743x_csr_read(adapter, MAC_CR);
+ if (enable)
+ mac_cr |= MAC_CR_EEE_EN_;
+ else
+ mac_cr &= ~MAC_CR_EEE_EN_;
+ lan743x_csr_write(adapter, MAC_CR, mac_cr);
+}
+
static void lan743x_phylink_mac_config(struct phylink_config *config,
unsigned int link_an_mode,
const struct phylink_link_state *state)
@@ -3014,7 +3026,11 @@ static void lan743x_phylink_mac_link_down(struct phylink_config *config,
unsigned int link_an_mode,
phy_interface_t interface)
{
+ struct net_device *netdev = to_net_dev(config->dev);
+ struct lan743x_adapter *adapter = netdev_priv(netdev);
+
netif_tx_stop_all_queues(to_net_dev(config->dev));
+ lan743x_mac_eee_enable(adapter, false);
}

static void lan743x_phylink_mac_link_up(struct phylink_config *config,
@@ -3056,6 +3072,9 @@ static void lan743x_phylink_mac_link_up(struct phylink_config *config,
cap & FLOW_CTRL_TX,
cap & FLOW_CTRL_RX);

+ if (phydev)
+ lan743x_mac_eee_enable(adapter, phydev->enable_tx_lpi);
+
netif_tx_wake_all_queues(netdev);
}

@@ -3265,6 +3284,9 @@ static int lan743x_netdev_open(struct net_device *netdev)
goto close_tx;
}

+ if (netdev->phydev)
+ phy_support_eee(netdev->phydev);
+
#ifdef CONFIG_PM
if (adapter->netdev->phydev) {
struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 7f73d66854be..8ef897c114d3 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -1206,5 +1206,6 @@ void lan743x_hs_syslock_release(struct lan743x_adapter *adapter);
void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
bool tx_enable, bool rx_enable);
int lan743x_sgmii_read(struct lan743x_adapter *adapter, u8 mmd, u16 addr);
+void lan743x_mac_eee_enable(struct lan743x_adapter *adapter, bool enable);

#endif /* _LAN743X_H */
--
2.34.1