This is a really great post to follow on how to integrate together SQL Server Reporting Services and SharePoint 2010. By its very name (Integrating SharePoint 2010 and SQL Reporting Services 2008 in 6 easy steps), it’s easy!
Note: You will already need to have Reporting Services installed with your SQL Server 2008 R2 installation before you begin the steps, so just do that ahead of time on your SQL Server (you’ll need the original media and can just add it on later if you didn’t do it initially).
http://www.codeproject.com/Articles/88285/Integrating-Sharepoint-2010-and-SQL-Reporting-Serv