igc: Expose the gPHY firmware version

Extend reporting of NVM image version to include the gPHY (i225 PHY)
firmware version.
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/igc/igc.h

@@ -218,7 +218,7 @@ struct igc_adapter {
 	struct timespec64 prev_ptp_time; /* Pre-reset PTP clock */
 	ktime_t ptp_reset_start; /* Reset time in clock mono */
 
-	char fw_version[16];
+	char fw_version[32];
 };
 
 void igc_up(struct igc_adapter *adapter);

drivers/net/ethernet/intel/igc/igc_ethtool.c

@@ -131,16 +131,21 @@ static void igc_ethtool_get_drvinfo(struct net_device *netdev,
 	struct igc_adapter *adapter = netdev_priv(netdev);
 	struct igc_hw *hw = &adapter->hw;
 	u16 nvm_version = 0;
+	u16 gphy_version;
 
 	strscpy(drvinfo->driver, igc_driver_name, sizeof(drvinfo->driver));
 
 	/* NVM image version is reported as firmware version for i225 device */
 	hw->nvm.ops.read(hw, IGC_NVM_DEV_STARTER, 1, &nvm_version);
 
+	/* gPHY firmware version is reported as PHY FW version */
+	gphy_version = igc_read_phy_fw_version(hw);
+
 	scnprintf(adapter->fw_version,
 		  sizeof(adapter->fw_version),
-		  "%x",
-		  nvm_version);
+		  "%x:%x",
+		  nvm_version,
+		  gphy_version);
 
 	strscpy(drvinfo->fw_version, adapter->fw_version,
 		sizeof(drvinfo->fw_version));

drivers/net/ethernet/intel/igc/igc_phy.c

@@ -791,3 +791,21 @@ s32 igc_read_phy_reg_gpy(struct igc_hw *hw, u32 offset, u16 *data)
 
 	return ret_val;
 }
+
+/**
+ * igc_read_phy_fw_version - Read gPHY firmware version
+ * @hw: pointer to the HW structure
+ */
+u16 igc_read_phy_fw_version(struct igc_hw *hw)
+{
+	struct igc_phy_info *phy = &hw->phy;
+	u16 gphy_version = 0;
+	u16 ret_val;
+
+	/* NVM image version is reported as firmware version for i225 device */
+	ret_val = phy->ops.read_reg(hw, IGC_GPHY_VERSION, &gphy_version);
+	if (ret_val)
+		hw_dbg("igc_phy: read wrong gphy version\n");
+
+	return gphy_version;
+}

drivers/net/ethernet/intel/igc/igc_phy.h

@@ -17,5 +17,6 @@ void igc_power_up_phy_copper(struct igc_hw *hw);
 void igc_power_down_phy_copper(struct igc_hw *hw);
 s32 igc_write_phy_reg_gpy(struct igc_hw *hw, u32 offset, u16 data);
 s32 igc_read_phy_reg_gpy(struct igc_hw *hw, u32 offset, u16 *data);
+u16 igc_read_phy_fw_version(struct igc_hw *hw);
 
 #endif

drivers/net/ethernet/intel/igc/igc_regs.h

@@ -13,6 +13,7 @@
 #define IGC_MDICNFG		0x00E04  /* MDC/MDIO Configuration - RW */
 #define IGC_CONNSW		0x00034  /* Copper/Fiber switch control - RW */
 #define IGC_I225_PHPM		0x00E14  /* I225 PHY Power Management */
+#define IGC_GPHY_VERSION	0x0001E  /* I225 gPHY Firmware Version */
 
 /* Internal Packet Buffer Size Registers */
 #define IGC_RXPBS		0x02404  /* Rx Packet Buffer Size - RW */