Broadcom 3808 support

From: Gerrit Kuehn <>
Date: Thu, 06 Jan 2022 10:29:04 UTC

I already asked this on -stable, but got no reply so far, so I'll try
again here:
I was thinking about buying something like Supermicro's
SSG-540P-E1CTR45L storage box which comes with a Broadcom 3808 chipset.
The Broadcom docs claim this has FreeBSD support, and so does this
thread of a few months ago:

However, I cannot find the mentioned support in the mpr driver when
looking into the code of FreeBSD 13, and I am missing any pointer from
which FreeBSD version on support might be available. I also don't
understand at all what is meant by "inbox driver" vs. "out-of-box
driver" from the post linked above.

Can anyone here shed a light on this for me? Is the Broadcom 3808 chip
supported, and if so, from which version on?