After successful switch to Eclipse IDE (see image) I gave up using the nforce ethernet binary module provided by NVIDIA. Instead, I have used the forcedeth module from linux kernel. It has one disadvantage – the whole nForce ethernet driver has to be GPL’ed. There are however much more advantages.
The driver was reverse-engeneered by kernel hackers. They wrote documentation for it and even fixed some bugs. Moreover, NVIDIA provided recently some patches for this module (sigh!) adding eg. gigabit ethernet support.
The nForce ethernet driver progresses quickly. Since whole source code is available and it is well documented, I may just adapt linux source to SANA-II standard. Currently, only two things are missing. One is the ring buffer support, the another is full SANA-II interface. Nevertheles the development should go way faster than before.