Paging and sorting the GridView control wih Entity Framework N Layer

Entity Framework is the best alternative of Microsoft for mapper a relational database to objects, and is already a very complete support in ASP.NET for populate the GridView control and enable the paging and sorting features directly by LinqDatasource object,but to use this alternative not have the chance to decouple the linq query in a business rules layer separated, which can be a problem if we have those requirements. The paging mut be done in the database for a more efficient query.