From 93ec439abeefe2e205657ae2b98a7fee4fbd4a0b Mon Sep 17 00:00:00 2001
From: Sasha Neftin <sasha.neftin@intel.com>
Date: Wed, 27 May 2020 13:51:32 -0700
Subject: igc: Add initial EEE support
IEEE802.3az-2010 Energy Efficient Ethernet has been
approved as standard (September 2010) and the driver
can enable and disable it via ethtool.
Disable the feature by default on parts which support it.
Add enable/disable eee options.
tx-lpi, tx-timer and advertise not supported yet.
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Reviewed-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
drivers/net/ethernet/intel/igc/igc_main.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
(limited to 'drivers/net/ethernet/intel/igc/igc_main.c')
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index c2f41a558fd6..7e4d56c7b4c4 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -102,6 +102,9 @@ void igc_reset(struct igc_adapter *adapter)
if (hw->mac.ops.init_hw(hw))
netdev_err(dev, "Error on hardware initialization\n");
+ /* Re-establish EEE setting */
+ igc_set_eee_i225(hw, true, true, true);
+
if (!netif_running(adapter->netdev))
igc_power_down_link(adapter);
@@ -4252,6 +4255,15 @@ static void igc_watchdog_task(struct work_struct *work)
(ctrl & IGC_CTRL_RFCE) ? "RX" :
(ctrl & IGC_CTRL_TFCE) ? "TX" : "None");
+ /* disable EEE if enabled */
+ if ((adapter->flags & IGC_FLAG_EEE) &&
+ adapter->link_duplex == HALF_DUPLEX) {
+ netdev_info(netdev,
+ "EEE Disabled: unsupported at half duplex. Re-enable using ethtool when at full duplex\n");
+ adapter->hw.dev_spec._base.eee_enable = false;
+ adapter->flags &= ~IGC_FLAG_EEE;
+ }
+
/* check if SmartSpeed worked */
igc_check_downshift(hw);
if (phy->speed_downgraded)
@@ -5182,6 +5194,10 @@ static int igc_probe(struct pci_dev *pdev,
netdev_info(netdev, "MAC: %pM\n", netdev->dev_addr);
dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
+ /* Disable EEE for internal PHY devices */
+ hw->dev_spec._base.eee_enable = false;
+ adapter->flags &= ~IGC_FLAG_EEE;
+ igc_set_eee_i225(hw, false, false, false);
pm_runtime_put_noidle(&pdev->dev);
--
cgit v1.2.3-70-g09d2