CFT: newath hal

[Larry Martin]

I'm trying to work with 11g/5MHz channels and tried the new 0.9.30.7 
ath_hal, but found that channel 33 for example still resulted in a 
20MHz wide channel as seen on a spectrum analyzer.  The 11a/5MHz PSB 
channels (82 for example) are 5MHz wide as expected.

I'm using a Wistron CM9 card (Atheros 5212?) and expected that I'd 
still see the 5MHz output, just still in the 2.4GHz band instead of 
900MHz.  Is this correct?

One additional note:  I'm transmitting packets via the BPF packet 
injection code, which works very well for my purposes.  I don't think 
this should affect the channel bandwidth.   I've tried specifying 
transmit data rates of both 1.5 and 6.0 Mb/s.  Interestingly, at 1.5 
Mb/s the receiver shows that the receive data rate is 1.5 Mb/s, but 
the actual throughput is ~3 Mb/s (which maybe sorta almost makes 
sense if it's still transmitting on a 20MHz channel?) I hope to 
capture the transmissions on a third radio with tcpdump to see what's 
really happening there.  Maybe that will provide additional insight 
into the 5 vs 20MHz issue.

awn2# sysctl dev.ath.0.countrycode=843
dev.ath.0.countrycode: 0 -> 843

awn2# ifconfig ath0 list chan
Channel   3 : 907* Mhz 11g/5Mhz     Channel  23 : 917* Mhz 11g/5Mhz
Channel   4 : 907* Mhz 11g/10Mhz    Channel  24 : 917* Mhz 11g/10Mhz
Channel  13 : 912* Mhz 11g/5Mhz     Channel  26 : 917* Mhz 11g
Channel  14 : 912* Mhz 11g/10Mhz    Channel  33 : 922* Mhz 11g/5Mhz
Channel  16 : 912* Mhz 11g          Channel  34 : 922* Mhz 11g/10Mhz

awn2# sysctl hw.ath
hw.ath.hal.version: 0.9.30.7
hw.ath.hal.dma_brt: 2
hw.ath.hal.sw_brt: 10
hw.ath.hal.swba_backoff: 0
hw.ath.dwell: 200
hw.ath.calibrate: 30
hw.ath.outdoor: 1
hw.ath.xchanmode: 1
hw.ath.countrycode: 0
hw.ath.regdomain: 0
hw.ath.rxbuf: 40
hw.ath.txbuf: 100