iwn(4) Intel 802.11n series NICs

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Overview

The iwn(4) driver supports the Intel 802.11n series wireless NICs.

Make	Supported Bands	Streams	Antennas	Bluetooth?	More information	Tester
Intel Centrino Wireless-N 100	2GHz	1×1	2	No	http://ark.intel.com/products/59478/Intel-Centrino-Wireless-N-100-Single-Band
Intel Centrino Wireless-N 130
Intel Centrino Wireless-N 1000
Intel Centrino Wireless-N 1030
Intel Centrino Wireless-N 2200						Eitan Adler
Intel Centrino Wireless-N 2230
Intel Wireless WiFi Link 4965	2GHz, 5GHz	2×2	2T, 3R	Unknown	http://www.intel.com/products/wireless/wireless_n/overview.htm
Intel WiFi Link 5100
Intel WiMAX/WiFi Link 5150
Intel Ultimate N WiFi Link 5300
Intel WiMAX/WiFi Link 5350
Intel Centrino Advanced-N 6200	2GHz, 5GHz	2×2	2	No	http://ark.intel.com/products/59470/Intel-Centrino-Advanced-N-6200-Dual-Band	Adrian Chadd
Intel Centrino Advanced-N 6205	2GHz, 5GHz	2×2	2	No	http://ark.intel.com/products/59471/Intel-Centrino-Advanced-N-6205-Dual-Band	Adrian Chadd
Intel Centrino Advanced-N 6230
Intel Centrino Wireless-N + WiMAX 6150
Intel Centrino Advanced-N + WiMAX 6250
Intel Centrino Ultimate-N 6300

Doing a single channel-at-a-time scan is causing issues when scanning some passive channels. Scans of those channels can take up to two minutes. Net80211 doesn't deal well with this kind of failure, but at least things now recover in -HEAD.
The A-MPDU transmit path occasionally gets the sequence number and transmit ring index out of sync and this causes A-MPDU transmit to stop working reliably. On later chips (eg 6xxx series) the firmware seems to panic when this occurs.

Merge in thermal throttling from Linux iwlwifi.
Extend net80211 to allow all of the scan code to be overridden; that way iwn(4) can do a full band scan in one command without doing individual channel changes and scans. It can do all of the background scanning and traffic handling in firmware.
Finish merging in work to do a channel change to retune the RF after some PLCP errors.
Add some way to log commands and command responses to the net80211 alq API, so debugging and diagnostics can be done.
Look at the RX statistics and see what is worth tracking per-channel for live diagnostics, like channel busy, error rates, etc