1. Layer on UEFI 2.2 ATA pass through protocol to perform ATA transaction. 2. Produce Block IO and DiskInfo protocol for each ATA devices. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9585 6f19259b-4bc3-4df7-8a09-765794883524