Add support Intel AX211 BZ MACs paired WiFi 6e RFs to iwx(4).
These devices are found in recent laptops using Intel AX211 WiFi 6e.
Only WiFi 6e, not WiFi 7, which will probably need a separate driver
as the Linux kernel does (iwlmld).
Firmware for BZ devices is available in fw_update.
There is still an unsolved problem with Tx performance. As soon as Tx
aggregation is used the device stalls and stops sending and receiving.
Tx performance is stable with block ack disabled, i.e. in mode 11a/b/g.
Help with figuring out the root cause of this would be appreciated.
I would have preferred to commit a fully working version but have
already spent quite a lot of time trying to find this last bug. It is
time to put this in anyway and hope the issue will be fixed soon.
Thanks to all involved for the support with review and testing of the
diffs which led up to this, to Johannes Berg for help with solving
various fatal firmware errors, to denis@'s company for making it
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handle missed beacons notification sent by newer iwx(4) firmware
Newer firmware uses a new missed-beacons notification code in the
MAC_CONF group, but otherwise behaves as previously.
Check return values of fcntl(... O_CLOEXEC) calls by reusing the macro
in monitor.c. Flagged by Coverity CID 901297 in ssh-sk-client.c, a few
other instances added for good measure. begrudging ok deraadt@
Only enable MIMO on MLD iwx(4) devices if our AP supports MIMO.
Same approach as we are using for the pre-MLD device generation.
OK phessler@ kevlo@ jan@
Only add iwx(4) firmware PHY context once our channel is known.
The Linux iwlwifi driver no longer adds unused firmware PHY contexts
because newer firmware runs calibration when a PHY context is added.
See linux.git commit f3276ff0d498a364dfdff74cc1825b5f6e27f472
ok phessler@ kevlo@
Tested:
AX200: stsp
AX210: kevlo
AX211: phessler
AX211 (BZ): stsp
