RPi4B: emmc2bus dma-range handling does not track the boot-time-FDT (u-boot based booting)

[bob prohaska]

On Thu, Oct 08, 2020 at 09:27:22PM -0500, Kyle Evans wrote:
> On Thu, Oct 8, 2020 at 9:18 PM bob prohaska <fbsd at www.zefox.net> wrote:
> >
> > On Thu, Oct 08, 2020 at 01:34:12PM -0500, Kyle Evans wrote:
> > >
> > > Here's a patch that I hacked out and can't test for quite a while yet,
> > > feel free to give it a shot:
> > > https://people.freebsd.org/~kevans/bcm2835_vcbus.diff  -- the best
> > > guarantee I can give you is that it builds. We'll need to test it on
> > > both RPi4 models with the separate bus and the original RPi4s, as well
> > > as an RPi3 and RPi2/0w.
> > >
> >
> > FWIW, a Pi3B running
> > FreeBSD www.zefox.org 13.0-CURRENT FreeBSD 13.0-CURRENT #0 r366466M: Thu Oct  8 17:18:55 PDT 2020     bob at www.zefox.org:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC  arm64
> >
> > seems to build, boot and run without immediate problems.
> >
> > A Pi2 running
> > FreeBSD www.zefox.com 13.0-CURRENT FreeBSD 13.0-CURRENT #2 r365692: Thu Oct  8 16:57:50 PDT 2020     bob at www.zefox.com:/usr/obj/usr/src/arm.armv7/sys/GENERIC-MMCCAM  arm
> >
> > also built, booted and ran.
> >
> > Uptime so far is only a few minutes, but so far, so good. If the MMCCAM
> > mismatch is significant let me know and I'll fix it.
> >
> 
> Thanks for testing!
> 
> Can you also confirm the output of `dmesg | grep 'WARNING:'`, please?
> In particular, I'd like to know if you hit either of:
> 
> WARNING: Improper peripheral attachment ...
> WARNING: bus for '...' missing dma-ranges
> 

On the Pi2 I see:
bob at www:~ % dmesg | grep 'WARNING:'
WARNING: WITNESS option enabled, expect reduced performance.
WARNING: Device "openfirm" is Giant locked and may be deleted before FreeBSD 13.0.
WARNING: Device "kbd" is Giant locked and may be deleted before FreeBSD 13.0.
WARNING: Device "fb" is Giant locked and may be deleted before FreeBSD 13.0.
WARNING: WITNESS option enabled, expect reduced performance.

On the Pi3 I see:
bob at www:~ % dmesg | grep 'WARNING:'
WARNING: WITNESS option enabled, expect reduced performance.
WARNING: Device "kbd" is Giant locked and may be deleted before FreeBSD 13.0.
WARNING: Device "openfirm" is Giant locked and may be deleted before FreeBSD 13.0.
WARNING: Device "fb" is Giant locked and may be deleted before FreeBSD 13.0.
WARNING: WITNESS option enabled, expect reduced performance.

so the answer seems to be "no".

HTH, let me know if I can try anthing else. Both installs are expendable.

bob prohaska