netdev - [PATCH net-next 09/13] ixgbe: apply different rules for setting FC on E610

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250429234651.3982025-10-anthony.l.nguyen@intel.com>
Date: Tue, 29 Apr 2025 16:46:44 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	andrew+netdev@...n.ch,
	netdev@...r.kernel.org
Cc: Jedrzej Jagielski <jedrzej.jagielski@...el.com>,
	anthony.l.nguyen@...el.com,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
	Simon Horman <horms@...nel.org>,
	Bharath R <bharath.r@...el.com>
Subject: [PATCH net-next 09/13] ixgbe: apply different rules for setting FC on E610

From: Jedrzej Jagielski <jedrzej.jagielski@...el.com>

E610 device doesn't support disabling FC autonegotiation.

Create dedicated E610 .set_pauseparam() implementation and assign
it to ixgbe_ethtool_ops_e610.

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
Reviewed-by: Simon Horman <horms@...nel.org>
Tested-by: Bharath R <bharath.r@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 .../net/ethernet/intel/ixgbe/ixgbe_ethtool.c  | 57 ++++++++++++++++---
 1 file changed, 49 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index abc8c279192a..435f3fc3cec3 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -564,6 +564,22 @@ static void ixgbe_get_pauseparam(struct net_device *netdev,
 	}
 }
 
+static void ixgbe_set_pauseparam_finalize(struct net_device *netdev,
+					  struct ixgbe_fc_info *fc)
+{
+	struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);
+	struct ixgbe_hw *hw = &adapter->hw;
+
+	/* If the thing changed then we'll update and use new autoneg. */
+	if (memcmp(fc, &hw->fc, sizeof(*fc))) {
+		hw->fc = *fc;
+		if (netif_running(netdev))
+			ixgbe_reinit_locked(adapter);
+		else
+			ixgbe_reset(adapter);
+	}
+}
+
 static int ixgbe_set_pauseparam(struct net_device *netdev,
 				struct ethtool_pauseparam *pause)
 {
@@ -592,15 +608,40 @@ static int ixgbe_set_pauseparam(struct net_device *netdev,
 	else
 		fc.requested_mode = ixgbe_fc_none;
 
-	/* if the thing changed then we'll update and use new autoneg */
-	if (memcmp(&fc, &hw->fc, sizeof(struct ixgbe_fc_info))) {
-		hw->fc = fc;
-		if (netif_running(netdev))
-			ixgbe_reinit_locked(adapter);
-		else
-			ixgbe_reset(adapter);
+	ixgbe_set_pauseparam_finalize(netdev, &fc);
+
+	return 0;
+}
+
+static int ixgbe_set_pauseparam_e610(struct net_device *netdev,
+				     struct ethtool_pauseparam *pause)
+{
+	struct ixgbe_adapter *adapter = ixgbe_from_netdev(netdev);
+	struct ixgbe_hw *hw = &adapter->hw;
+	struct ixgbe_fc_info fc = hw->fc;
+
+	if (!ixgbe_device_supports_autoneg_fc(hw))
+		return -EOPNOTSUPP;
+
+	if (pause->autoneg == AUTONEG_DISABLE) {
+		netdev_info(netdev,
+			    "Cannot disable autonegotiation on this device.\n");
+		return -EOPNOTSUPP;
 	}
 
+	fc.disable_fc_autoneg = false;
+
+	if (pause->rx_pause && pause->tx_pause)
+		fc.requested_mode = ixgbe_fc_full;
+	else if (pause->rx_pause)
+		fc.requested_mode = ixgbe_fc_rx_pause;
+	else if (pause->tx_pause)
+		fc.requested_mode = ixgbe_fc_tx_pause;
+	else
+		fc.requested_mode = ixgbe_fc_none;
+
+	ixgbe_set_pauseparam_finalize(netdev, &fc);
+
 	return 0;
 }
 
@@ -3710,7 +3751,7 @@ static const struct ethtool_ops ixgbe_ethtool_ops_e610 = {
 	.set_ringparam          = ixgbe_set_ringparam,
 	.get_pause_stats	= ixgbe_get_pause_stats,
 	.get_pauseparam         = ixgbe_get_pauseparam,
-	.set_pauseparam         = ixgbe_set_pauseparam,
+	.set_pauseparam         = ixgbe_set_pauseparam_e610,
 	.get_msglevel           = ixgbe_get_msglevel,
 	.set_msglevel           = ixgbe_set_msglevel,
 	.self_test              = ixgbe_diag_test,
-- 
2.47.1