Dear Madame,
The linux BSP is a paid option and the linux BSP only supports PCI firmware, not Ethernet firmware. You can either refer to SD040, the sip_mac_engine documentation, chapter 5 in order to implement your own API or contract 4DSP to port that for you but you should then expect some NRE costs.
The way to do that on Linux would be to use libpcap and implement your packet manipulation. 4DSP have no Linux software for ML605-FMC110 on Ethernet available.
Shall I get one of my sales engineer to contact you to discuss that further?
Best Regards,
Arnaud