Subject: [PATCH 1/1] net-next: e1000e: Enable Link Partner Advertised Support

From: Jamie Gloudon <[email-masked]>
Date: Tue, 8 Nov 2022 11:24:03 -0400

This enables link partner advertised support to show link modes and
pause frame use.

Signed-off-by: Jamie Gloudon <[email-masked]>
---
 drivers/net/ethernet/intel/e1000e/ethtool.c | 10 +++++++++-
 drivers/net/ethernet/intel/e1000e/phy.c     |  9 +++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c
index 51a5afe9df2f..743462adccd0 100644
--- a/drivers/net/ethernet/intel/e1000e/ethtool.c
+++ b/drivers/net/ethernet/intel/e1000e/ethtool.c
@@ -110,9 +110,9 @@ static const char e1000_gstrings_test[][ETH_GSTRING_LEN] = {
 static int e1000_get_link_ksettings(struct net_device *netdev,
 				    struct ethtool_link_ksettings *cmd)
 {
+	u32 speed, supported, advertising, lp_advertising, lpa_t;
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 	struct e1000_hw *hw = &adapter->hw;
-	u32 speed, supported, advertising;
 
 	if (hw->phy.media_type == e1000_media_type_copper) {
 		supported = (SUPPORTED_10baseT_Half |
@@ -120,7 +120,9 @@ static int e1000_get_link_ksettings(struct net_device *netdev,
 			     SUPPORTED_100baseT_Half |
 			     SUPPORTED_100baseT_Full |
 			     SUPPORTED_1000baseT_Full |
+			     SUPPORTED_Asym_Pause |
 			     SUPPORTED_Autoneg |
+			     SUPPORTED_Pause |
 			     SUPPORTED_TP);
 		if (hw->phy.type == e1000_phy_ife)
 			supported &= ~SUPPORTED_1000baseT_Full;
@@ -192,10 +194,16 @@ static int e1000_get_link_ksettings(struct net_device *netdev,
 	if (hw->phy.media_type != e1000_media_type_copper)
 		cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
 
+	lpa_t = mii_stat1000_to_ethtool_lpa_t(adapter->phy_regs.stat1000);
+	lp_advertising = lpa_t |
+	mii_lpa_to_ethtool_lpa_t(adapter->phy_regs.lpa);
+
 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 						supported);
 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 						advertising);
+	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
+						lp_advertising);
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/intel/e1000e/phy.c b/drivers/net/ethernet/intel/e1000e/phy.c
index 060b263348ce..08c3d477dd6f 100644
--- a/drivers/net/ethernet/intel/e1000e/phy.c
+++ b/drivers/net/ethernet/intel/e1000e/phy.c
@@ -2,6 +2,7 @@
 /* Copyright(c) 1999 - 2018 Intel Corporation. */
 
 #include "e1000.h"
+#include <linux/ethtool.h>
 
 static s32 e1000_wait_autoneg(struct e1000_hw *hw);
 static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
@@ -1011,6 +1012,8 @@ static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
 		 */
 		mii_autoneg_adv_reg &=
 		    ~(ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
+		phy->autoneg_advertised &=
+		    ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
 		break;
 	case e1000_fc_rx_pause:
 		/* Rx Flow control is enabled, and Tx Flow control is
@@ -1024,6 +1027,8 @@ static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
 		 */
 		mii_autoneg_adv_reg |=
 		    (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
+		phy->autoneg_advertised |=
+		    (ADVERTISED_Pause | ADVERTISED_Asym_Pause);
 		break;
 	case e1000_fc_tx_pause:
 		/* Tx Flow control is enabled, and Rx Flow control is
@@ -1031,6 +1036,8 @@ static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
 		 */
 		mii_autoneg_adv_reg |= ADVERTISE_PAUSE_ASYM;
 		mii_autoneg_adv_reg &= ~ADVERTISE_PAUSE_CAP;
+		phy->autoneg_advertised |= ADVERTISED_Asym_Pause;
+		phy->autoneg_advertised &= ~ADVERTISED_Pause;
 		break;
 	case e1000_fc_full:
 		/* Flow control (both Rx and Tx) is enabled by a software
@@ -1038,6 +1045,8 @@ static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
 		 */
 		mii_autoneg_adv_reg |=
 		    (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
+		phy->autoneg_advertised |=
+		    (ADVERTISED_Pause | ADVERTISED_Asym_Pause);
 		break;
 	default:
 		e_dbg("Flow control param set incorrectly\n");
-- 
2.28.0