[ath9k-devel] ath9k rate control - rc.c

[Vasanthakumar Thiagarajan <vasanth@atheros.com>]

On Tue, Oct 20, 2009 at 11:28:41AM +0530, Rakesh Kumar wrote:

>I am having trouble identifying what information is available to the driver programmer? Is there a comprehensive document or something which explains it, if so is it available in public domain?

As far as rate control parameters are concerned, h/w expects the
rate code and maximum number of tries at that rate. ath9k supports
retries at four different rates, say r0..r3 where r0 is the
highest ideal rate, r1 is the next highest and so on. I don't think
there is any doc on ath9k rc.

> I am just curious what these variables rssi_ctl0,ctl1,ctl2,ext0,ext1,ext2 contain?

These are just rssi values on contol channel and ext channel of chain 0
and chain 1.

> Also the rssi measurement ts_rssi, what does it really represent on a 2 link MIMO card?

This is combined rssi value out of active MIMO.

> How is this number calculated and calibrated?

I'm not quite sure how it is done in h/w.


Vasanth