chip to chip high speed interconnet bus

Hi,everyone,now i want to know how can i change the high speed data between 2 chips=A3=A8one from lattice scm and one from xilinx=A3=A9,now I u= se the lattice sc for pci-e interface and the xilinx fpga for data processing=A3=A8coperate with others familiar with xilinx=A3=A9.Can any giv= e me some advice.