There may be other names, the one I know (from reading US fiction) is a **Porte cochere**

> [Definition of porte cocher][1]e Merriam-Webster

> 1 :  a passageway through a building or screen wall designed to let
> vehicles pass from the street to an interior courtyard
> 
> 2 :  a roofed structure extending from the entrance of a building over
> an adjacent driveway and sheltering those getting in or out of
> vehicles


  [1]: https://www.merriam-webster.com/dictionary/porte%20cochere