Please review our new version of the iSCSI Initiator drivers for Chelsio S3 adapters. The cxgb3i driver provides iscsi acceleration (PDU digest offload and payload direct-placement) to the open-iscsi initiator. It accesses the hardware through the cxgb3 module.
The accelerated iscsi traffic uses a private IP address which is unknown to the OS.
netdev list, please review part 1, 2 and cxgb3i_offload.[ch] in part 4 which handle the iscsi connection APIs to the adapter.