+/**
+ * DPDK callback to change the MTU.
+ *
+ * Setting the MTU affects hardware MRU (packets larger than the MRU
+ * will be dropped).
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param mtu
+ * New MTU.
+ *
+ * @return
+ * 0 on success, negative error value otherwise.
+ */
+static int
+mrvl_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+ struct mrvl_priv *priv = dev->data->dev_private;
+ /* extra MV_MH_SIZE bytes are required for Marvell tag */
+ uint16_t mru = mtu + MV_MH_SIZE + ETHER_HDR_LEN + ETHER_CRC_LEN;
+ int ret;
+
+ if (mtu < ETHER_MIN_MTU || mru > MRVL_PKT_SIZE_MAX)
+ return -EINVAL;
+
+ ret = pp2_ppio_set_mru(priv->ppio, mru);
+ if (ret)
+ return ret;
+
+ return pp2_ppio_set_mtu(priv->ppio, mtu);
+}
+