+/**
+ * Acquire swfw semaphore lock for MDIO access
+ *
+ * @param port
+ * The port identifier of the Ethernet device.
+ * @return
+ * - (0) if successful.
+ * - (-ENOTSUP) if hardware doesn't support.
+ * - (-ENODEV) if *port* invalid.
+ * - (IXGBE_ERR_SWFW_SYNC) If sw/fw semaphore acquisition failed
+ */
+__rte_experimental
+int
+rte_pmd_ixgbe_mdio_lock(uint16_t port);
+
+/**
+ * Release swfw semaphore lock used for MDIO access
+ *
+ * @param port
+ * The port identifier of the Ethernet device.
+ * @return
+ * - (0) if successful.
+ * - (-ENOTSUP) if hardware doesn't support.
+ * - (-ENODEV) if *port* invalid.
+ */
+__rte_experimental
+int
+rte_pmd_ixgbe_mdio_unlock(uint16_t port);
+
+/**
+ * Read PHY register using MDIO without MDIO lock
+ * The lock must be taken separately before calling this
+ * API
+ * @param port
+ * The port identifier of the Ethernet device.
+ * @param reg_addr
+ * 32 bit PHY Register
+ * @param dev_type
+ * Used to define device base address
+ * @param phy_data
+ * Pointer for reading PHY register data
+ * @return
+ * - (0) if successful.
+ * - (-ENOTSUP) if hardware doesn't support.
+ * - (-ENODEV) if *port* invalid.
+ * - (IXGBE_ERR_PHY) If PHY read command failed
+ */
+__rte_experimental
+int
+rte_pmd_ixgbe_mdio_unlocked_read(uint16_t port, uint32_t reg_addr,
+ uint32_t dev_type, uint16_t *phy_data);
+
+/**
+ * Write data to PHY register using without MDIO lock
+ * The lock must be taken separately before calling this
+ * API
+ *
+ * @param port
+ * The port identifier of the Ethernet device.
+ * @param reg_addr
+ * 32 bit PHY Register
+ * @param dev_type
+ * Used to define device base address
+ * @param phy_data
+ * Data to write to PHY register
+ * @return
+ * - (0) if successful.
+ * - (-ENOTSUP) if hardware doesn't support.
+ * - (-ENODEV) if *port* invalid.
+ * - (IXGBE_ERR_PHY) If PHY read command failed
+ */
+__rte_experimental
+int
+rte_pmd_ixgbe_mdio_unlocked_write(uint16_t port, uint32_t reg_addr,
+ uint32_t dev_type, uint16_t phy_data);