hostap TX fix in 5.x [Fwd: Re: wi hostap speed]

[Brian Fundakowski Feldman]

"James Bowman" <jamesb at acelere.net> wrote:
> I spent a few hours tinkering (tampering?) with this driver, and have not
> exactly a fix, but a clear indication of what the problem is.
> 
> Verified (using the quick hack below): download speed geoes up from 170
> kbytes/sec to 470 kbytes/sec, which is what I'd expect on an 11Mbps network.
> 
> If anyone's interested, here it is:
> 
> The Intersil manual on page 4-28 says that transmit packets need to have their
> TxRate field filled in with 10,20,55 or 110, depending on the transmission speed.
> 
> The 4.X driver sets the field tx_frame.wi_tx_rate in function
> wihap_check_tx(), called from wi_start().
> 
> The 5.X driver calls this field frmhdr.wi_tx_rate, but leaves it zero.
> If you want to run at 11MBps, add a line
>                   frmhdr.wi_tx_rate = 110;
> in wi_start(), just before the call to wi_write_bap().
> 
> (Obviously, this is just a cheesy hack.  The real code would have to find the
> actual tx rate.  I just want to point out where the problem lies).

In that case, I'd try adding this line where the frmhdr is being set up:
frmhdr.wi_tx_rate = ni->ni_rates.rs_rates[ni->ni_txrate] * 5;
I haven't tested it other than it compiles, but if it seems to work for you 
I'll of course verify that I can/cannot get those speeds with/without this 
change, using hostap.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green at FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\