onboard wireless on rpi4

[tech-lists]

On Sun, Sep 06, 2020 at 06:15:35PM +0000, Robert Crowston via freebsd-arm wrote:
>Using only the lowest 1 GiB for DMA seems completely reliable. Perhaps I could have a volunteer to test https://reviews.freebsd.org/D26344 ?

Hi,

Before your patch, I tried to create a 3GB file via /dev/random on a
usb3-connected-and-powered spinning rust drive and got errors so bad the drive
disconnected itself, see
https://cloud.zyxst.net/~john/FreeBSD/raspberry_pi_4/rpi4-before-D26344.txt

After rebuilding the kernel with your patch, these errors have gone. I've
tried up to 16GB so far, no errors. Transferring a file of that size busies up
the filesystem on the sdcard though and logins will time out if they are
attempted while a large file transfer to the sdcard is happening. But the
errors have gone, and the drive doesn't re-set itself.

thanks,
-- 
J.
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