Creation of Generic Data source using function module based on the program which was used to created ABAP report

Hi,

We have a requirement to create a BI report based on plant maintenance report. The plant maintenance report is based on a ABAP program with complex logic. My question is i want create a Generic Datasource using Function module and can I include the logic(Abap Program) that is used for plant maintenance report in the function module? Please share your thoughts.

Thanks,

Ravi