how to implement a SCSI commands through a driver?

Hi all , Im trying to implement a custom new storage protocl which uses SCSI for storage in Linux . I have been looking around for some files in the Linux SCSI subsystems to understand its three layered design. The idea is to develop a separate stack which will internally use SCSI . so to get started all i want to do is write a module(kernel space) which sends SCSI commands to target device and retrieve some information from it. any idea like to how to proceed and which are files/books that can help me in this regard. I'm reading SCSI SPC-4 and SBC-3 specifications .