Use of EITR register in I210 controller

Hi,

I am using I210 controller.

I have some queries regarding the usage of EITR register in I210 controller in non MSI-X mode.

I am working with non-MSI mode of this controller. My questions are,

1. Is there a way to increase the time gap between the consecutive interrupts in non MSI-X mode?

2. Can I use EITR register in non MSI-X mode.

In 1GBPS link I am getting RXDW interrupt for incoming packets at the interval of ~11us.

But I want to increase this time gap to ~100us.

For that reason I am planning to use "Interval" bit of EITR register.

But when I set value 100 in this field then the interrupt processing stops. Also, I have observed that if I set value <5 then the interrupt processing occurs.

Could anyone give me any idea regarding this?

Thanks in advance,

Sumit Kumar Paul