Tuesday, March 26, 2013

Hey, look, it's lots of atheros NICs in one laptop

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So after many months of evenings and a whole lot of work internally to get the AR9380 HAL release vetted by legal, I bring you: a single, un...
4 comments:
Tuesday, March 19, 2013

AR9380 support on FreeBSD; why it's taken so long..

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There's now public, open source support for the AR9380 and later chips for FreeBSD. It's not yet in the -HEAD tree - I'll get ...
4 comments:
Sunday, March 3, 2013

Why PCI latency timers matter..

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My latest "are you serious?" moment recently was trying to figure out the root cause of this performance issue with the AR5416 car...
Friday, November 30, 2012

Be careful of adding debugging, as microseconds count..

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.. after tinkering with the TDMA code a bit more, I discovered why I was seeing larger swings in the TDMA slot timings. Two words: Debug C...
Tuesday, November 27, 2012

Getting TDMA working on 802.11n chipsets

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A few years ago, a bunch of clever people figured out how to implement TDMA using the Atheros 802.11abg NICs. Sam Leffler has a great write-...
Tuesday, November 20, 2012

Making the AR5210 NIC work in the office..

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I'm quite happy that FreeBSD's ath(4) driver supports almost all of the PCI and PCIe devices that Atheros has made. Once I find a wa...
Thursday, October 4, 2012

Power save, CABQ, multicast frames, EAPOL frames and sequence numbers (or why does my Macbook Pro keep disassociating?)

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I do lots of traffic tests when I commit changes to the FreeBSD Atheros HAL or driver. And I hadn't noticed any problems until very rece...