[PATCH net-next 1/5] net: rnpgbe: Add basic ethtool support

[Dong Yibo]

Add get_drvinfo and get_link callbacks to report the driver name,
PCI bus address, firmware version and carrier state through ethtool.

Signed-off-by: Dong Yibo <dong100@xxxxxxxxx>
---
 drivers/net/ethernet/mucse/rnpgbe/Makefile    |  1 +
 drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h    |  3 +++
 .../ethernet/mucse/rnpgbe/rnpgbe_ethtool.c    | 25 +++++++++++++++++++
 .../net/ethernet/mucse/rnpgbe/rnpgbe_main.c   |  1 +
 .../net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c |  4 ++-
 5 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 drivers/net/ethernet/mucse/rnpgbe/rnpgbe_ethtool.c

diff --git a/drivers/net/ethernet/mucse/rnpgbe/Makefile b/drivers/net/ethernet/mucse/rnpgbe/Makefile
index 17574cad392a..4d768324a82c 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/Makefile
+++ b/drivers/net/ethernet/mucse/rnpgbe/Makefile
@@ -9,4 +9,5 @@ rnpgbe-objs := rnpgbe_main.o\
 	       rnpgbe_chip.o\
 	       rnpgbe_mbx.o\
 	       rnpgbe_mbx_fw.o\
+	       rnpgbe_ethtool.o\
 	       rnpgbe_lib.o
diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
index 4e9776b28bfb..2fe76c95da7c 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
@@ -46,6 +46,7 @@ struct mucse_hw {
 	struct mucse_mbx_info mbx;
 	int port;
 	int speed;
+	u32 fw_version;
 	bool link;
 	u16 cycles_per_us;
 	u8 pfvfnum;
@@ -257,6 +258,8 @@ int rnpgbe_set_rx_mode(struct net_device *netdev,
 		       struct netdev_hw_addr_list *mc);
 void rnpgbe_set_link(struct mucse_hw *hw, bool linkup);
 
+extern const struct ethtool_ops rnpgbe_ethtool_ops;
+
 /* Device IDs */
 #define PCI_VENDOR_ID_MUCSE               0x8848
 #define RNPGBE_DEVICE_ID_N500_QUAD_PORT   0x8308
diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_ethtool.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_ethtool.c
new file mode 100644
index 000000000000..506233f62698
--- /dev/null
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_ethtool.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2022 - 2026 Mucse Corporation. */
+
+#include <linux/ethtool.h>
+#include <linux/pci.h>
+
+#include "rnpgbe.h"
+
+static void rnpgbe_get_drvinfo(struct net_device *netdev,
+			       struct ethtool_drvinfo *info)
+{
+	struct mucse *mucse = netdev_priv(netdev);
+	u32 version = mucse->hw.fw_version;
+
+	strscpy(info->driver, KBUILD_MODNAME);
+	strscpy(info->bus_info, pci_name(mucse->pdev));
+	snprintf(info->fw_version, sizeof(info->fw_version), "%u.%u.%u.%u",
+		 version >> 24, (version >> 16) & 0xff,
+		 (version >> 8) & 0xff, version & 0xff);
+}
+
+const struct ethtool_ops rnpgbe_ethtool_ops = {
+	.get_drvinfo = rnpgbe_get_drvinfo,
+	.get_link = ethtool_op_get_link,
+};
diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c
index 708a7297233e..46981ef2542a 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c
@@ -250,6 +250,7 @@ static int rnpgbe_add_adapter(struct pci_dev *pdev,
 	}
 
 	netdev->netdev_ops = &rnpgbe_netdev_ops;
+	netdev->ethtool_ops = &rnpgbe_ethtool_ops;
 	netdev->priv_flags |= IFF_UNICAST_FLT;
 	rnpgbe_sw_init(mucse);
 	err = rnpgbe_reset_hw(hw);
diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c
index c6ce9dbee3d0..4a1893792751 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c
@@ -72,9 +72,11 @@ static int mucse_mbx_get_info(struct mucse_hw *hw)
 	int err;
 
 	err = mucse_fw_send_cmd_wait_resp(hw, &req, &reply);
-	if (!err)
+	if (!err) {
 		hw->pfvfnum = FIELD_GET(GENMASK_U16(7, 0),
 					le16_to_cpu(reply.r.hw_info.pfnum));
+		hw->fw_version = le32_to_cpu(reply.r.hw_info.fw_version);
+	}
 
 	return err;
 }
-- 
2.50.1