net/mlx5: support getting MTU on Windows

This commit implements API mlx5_get_mtu(). It returns the MTU size as
saved in the device context since its creation.

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>

diff --git a/drivers/net/mlx5/windows/mlx5_ethdev_os.c b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
index 1b68a7b..614322b 100644 (file)
--- a/drivers/net/mlx5/windows/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
@@ -43,6 +43,33 @@ mlx5_get_mac(struct rte_eth_dev *dev, uint8_t (*mac)[RTE_ETHER_ADDR_LEN])
        return 0;
 }
 
+/**
+ * Get device MTU.
+ *
+ * @param dev
+ *   Pointer to Ethernet device.
+ * @param[out] mtu
+ *   MTU value output buffer.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
+{
+       struct mlx5_priv *priv;
+       mlx5_context_st *context_obj;
+
+       if (!dev) {
+               rte_errno = EINVAL;
+               return -rte_errno;
+       }
+       priv = dev->data->dev_private;
+       context_obj = (mlx5_context_st *)priv->sh->ctx;
+       *mtu = context_obj->mlx5_dev.mtu_bytes;
+       return 0;
+}
+
 /**
  * Set device MTU.
  *