ethdev: add min/max MTU to device info

[dpdk.git] / lib / librte_ethdev / rte_ethdev.c

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 12b66b6..10bdfb3 100644 (file)
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -2532,6 +2532,8 @@ rte_eth_dev_info_get(uint16_t port_id, struct rte_eth_dev_info *dev_info)
        dev_info->rx_desc_lim = lim;
        dev_info->tx_desc_lim = lim;
        dev_info->device = dev->device;
+       dev_info->min_mtu = ETHER_MIN_MTU;
+       dev_info->max_mtu = UINT16_MAX;
 
        RTE_FUNC_PTR_OR_RET(*dev->dev_ops->dev_infos_get);
        (*dev->dev_ops->dev_infos_get)(dev, dev_info);
@@ -2595,12 +2597,25 @@ int
 rte_eth_dev_set_mtu(uint16_t port_id, uint16_t mtu)
 {
        int ret;
+       struct rte_eth_dev_info dev_info;
        struct rte_eth_dev *dev;
 
        RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
        dev = &rte_eth_devices[port_id];
        RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->mtu_set, -ENOTSUP);
 
+       /*
+        * Check if the device supports dev_infos_get, if it does not
+        * skip min_mtu/max_mtu validation here as this requires values
+        * that are populated within the call to rte_eth_dev_info_get()
+        * which relies on dev->dev_ops->dev_infos_get.
+        */
+       if (*dev->dev_ops->dev_infos_get != NULL) {
+               rte_eth_dev_info_get(port_id, &dev_info);
+               if (mtu < dev_info.min_mtu || mtu > dev_info.max_mtu)
+                       return -EINVAL;
+       }
+
        ret = (*dev->dev_ops->mtu_set)(dev, mtu);
        if (!ret)
                dev->data->mtu = mtu;