[PATCH v9 15/21] wifi: nxpwifi: add ethtool support for Wake-on-LAN

[Jeff Chen <jeff.chen_1@nxp.com>]

This patch adds basic ethtool support to the nxpwifi driver, specifically
implementing Wake-on-LAN (WoL) configuration via ethtool.

Supported WoL options:
- WAKE_UCAST
- WAKE_MCAST
- WAKE_BCAST
- WAKE_PHY

The ethtool ops `get_wol` and `set_wol` are implemented to map ethtool
WoL flags to the driver's internal host sleep configuration.

This enables users to query and configure WoL behavior using standard
ethtool commands.

Signed-off-by: Jeff Chen <jeff.chen_1@nxp.com>
---
 drivers/net/wireless/nxp/nxpwifi/ethtool.c | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 drivers/net/wireless/nxp/nxpwifi/ethtool.c

diff --git a/drivers/net/wireless/nxp/nxpwifi/ethtool.c b/drivers/net/wireless/nxp/nxpwifi/ethtool.c
new file mode 100644
index 000000000000..aabb635afcf5
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/ethtool.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * nxpwifi: ethtool
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "main.h"
+
+static void nxpwifi_ethtool_get_wol(struct net_device *dev,
+				    struct ethtool_wolinfo *wol)
+{
+	struct nxpwifi_private *priv = nxpwifi_netdev_get_priv(dev);
+	u32 conditions = le32_to_cpu(priv->adapter->hs_cfg.conditions);
+
+	wol->supported = WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_PHY;
+
+	if (conditions == HS_CFG_COND_DEF)
+		return;
+
+	if (conditions & HS_CFG_COND_UNICAST_DATA)
+		wol->wolopts |= WAKE_UCAST;
+	if (conditions & HS_CFG_COND_MULTICAST_DATA)
+		wol->wolopts |= WAKE_MCAST;
+	if (conditions & HS_CFG_COND_BROADCAST_DATA)
+		wol->wolopts |= WAKE_BCAST;
+	if (conditions & HS_CFG_COND_MAC_EVENT)
+		wol->wolopts |= WAKE_PHY;
+}
+
+static int nxpwifi_ethtool_set_wol(struct net_device *dev,
+				   struct ethtool_wolinfo *wol)
+{
+	struct nxpwifi_private *priv = nxpwifi_netdev_get_priv(dev);
+	u32 conditions = 0;
+
+	if (wol->wolopts & ~(WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_PHY))
+		return -EOPNOTSUPP;
+
+	if (wol->wolopts & WAKE_UCAST)
+		conditions |= HS_CFG_COND_UNICAST_DATA;
+	if (wol->wolopts & WAKE_MCAST)
+		conditions |= HS_CFG_COND_MULTICAST_DATA;
+	if (wol->wolopts & WAKE_BCAST)
+		conditions |= HS_CFG_COND_BROADCAST_DATA;
+	if (wol->wolopts & WAKE_PHY)
+		conditions |= HS_CFG_COND_MAC_EVENT;
+	if (wol->wolopts == 0)
+		conditions |= HS_CFG_COND_DEF;
+	priv->adapter->hs_cfg.conditions = cpu_to_le32(conditions);
+
+	return 0;
+}
+
+const struct ethtool_ops nxpwifi_ethtool_ops = {
+	.get_wol = nxpwifi_ethtool_get_wol,
+	.set_wol = nxpwifi_ethtool_set_wol,
+};
-- 
2.34.1