1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/net/can/rockchip/rockchip_canfd-ethtool.c b/drivers/net/can/rockchip/rockchip_canfd-ethtool.c
new file mode 100644
index 000000000000..5aeeef64a67a
--- /dev/null
+++ b/drivers/net/can/rockchip/rockchip_canfd-ethtool.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2023, 2024 Pengutronix,
+//               Marc Kleine-Budde <kernel@pengutronix.de>
+//
+
+#include <linux/ethtool.h>
+
+#include "rockchip_canfd.h"
+
+enum rkcanfd_stats_type {
+	RKCANFD_STATS_TYPE_RX_FIFO_EMPTY_ERRORS,
+	RKCANFD_STATS_TYPE_TX_EXTENDED_AS_STANDARD_ERRORS,
+};
+
+static const char rkcanfd_stats_strings[][ETH_GSTRING_LEN] = {
+	[RKCANFD_STATS_TYPE_RX_FIFO_EMPTY_ERRORS] = "rx_fifo_empty_errors",
+	[RKCANFD_STATS_TYPE_TX_EXTENDED_AS_STANDARD_ERRORS] = "tx_extended_as_standard_errors",
+};
+
+static void
+rkcanfd_ethtool_get_strings(struct net_device *ndev, u32 stringset, u8 *buf)
+{
+	switch (stringset) {
+	case ETH_SS_STATS:
+		memcpy(buf, rkcanfd_stats_strings,
+		       sizeof(rkcanfd_stats_strings));
+	}
+}
+
+static int rkcanfd_ethtool_get_sset_count(struct net_device *netdev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		return ARRAY_SIZE(rkcanfd_stats_strings);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void
+rkcanfd_ethtool_get_ethtool_stats(struct net_device *ndev,
+				  struct ethtool_stats *stats, u64 *data)
+{
+	struct rkcanfd_priv *priv = netdev_priv(ndev);
+	struct rkcanfd_stats *rkcanfd_stats;
+	unsigned int start;
+
+	rkcanfd_stats = &priv->stats;
+
+	do {
+		start = u64_stats_fetch_begin(&rkcanfd_stats->syncp);
+
+		data[RKCANFD_STATS_TYPE_RX_FIFO_EMPTY_ERRORS] =
+			u64_stats_read(&rkcanfd_stats->rx_fifo_empty_errors);
+		data[RKCANFD_STATS_TYPE_TX_EXTENDED_AS_STANDARD_ERRORS] =
+			u64_stats_read(&rkcanfd_stats->tx_extended_as_standard_errors);
+	} while (u64_stats_fetch_retry(&rkcanfd_stats->syncp, start));
+}
+
+static const struct ethtool_ops rkcanfd_ethtool_ops = {
+	.get_ts_info = can_ethtool_op_get_ts_info_hwts,
+	.get_strings = rkcanfd_ethtool_get_strings,
+	.get_sset_count = rkcanfd_ethtool_get_sset_count,
+	.get_ethtool_stats = rkcanfd_ethtool_get_ethtool_stats,
+};
+
+void rkcanfd_ethtool_init(struct rkcanfd_priv *priv)
+{
+	priv->ndev->ethtool_ops = &rkcanfd_ethtool_ops;
+
+	u64_stats_init(&priv->stats.syncp);
+}