I think you would just about have to start from square one if you want an open source FPGA toolchain. I don't believe such a toolchain exists at all right now.

I think you would just about have to start from square one if you want an open source FPGA toolchain. I don't believe such a toolchain exists at all right now. So what I'm saying is, forget about developing a PCI-e FPGA board. If you want an open source toolchain for it, you better start there, because that's going to be 99.9% of the effort.