Re: [PATCH 05/11] mac80211: adding mac80211_tx_control_flags andHT flags

["Ron Rindjunsky" <ron.rindjunsky@intel.com>]

> > > It seems to me that these flags aren't entirely orthogonal to the
> > > bitrates?
> >
> > no, they are all orthogonal to each other. the example you gave will
> > give us 108MBit. all flags can be used, as long they match the spec,
> > and that's the algorithm responsibility to check and determine.
> > I guess that the flag that is more confusing is OFDM_HT. since 11n
> > supports (theoretically...) n streams of data, using flags like SISO /
> > MIMO / MIMO_3_ANT / MIMO_... seemed the wrong way. in stead, once you
> > know OFDM_HT is up, a check to antenna_sel_tx will determine the Tx
> > expected method.
>
> Ahh! Ok, thanks for the explanation. Is antenna_sel_tx really the right
> thing though? Tomas mentioned that you can have three antennas and only
> two chains so should that rather be a chain selection?
>

yes, this is correct from low level driver's perspective, but i think
that from rate scaling perspective keeping the antenna term is clearer
then a chain.

> > It may be good to add this to the file's documentation.
>
> Indeed. Or to a DOC: section somewhere so it can be added to an 11n
> chapter of the mac80211 book (since the patch is merged I'm
> automatically generating it nightly at
> http://linuxwireless.org/mac80211book/)
>

I'll make a patch with the explanation