I am attempting to write a driver for the AX99100 that utilized the PCIe MSI interrupt vectors.

I notice that the card supports 8 MSI vectors, but I cannot find any documentation for what any of these vectors maps to for function.

I do know that just using the 1st is insufficient for operation.  Either a description of operation or example code using the MSI vectors would be appreciated (I downloaded the Linux driver code, but it only makes use of the legacy interrupt mechanism)