NETMAP resource usage question

[Slawa Olhovchenkov]

How can I calculate the necessary resources for NATMAP?
I am talk about next resources:

dev.netmap.buf_num
dev.netmap.ring_num
dev.netmap.ring_size
dev.netmap.if_num
dev.netmap.if_size

For example for case of

ix0 6+6 rings, 2048+2048 slots, 20 additional pipes
igb0 6+6 rings, 1024+1024 slots, 4 additional pipes

open 6 netmap's to ix0, 1+1 rings each
open 6 netmap's to igb0, 1+1 rings each
open 20 pipes over ix0
open 4 pipes over igb0

What's total number of resources I am planed to use?