Re: WDCTL_RST

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Fri, Aug 24, 2018 at 06:37:29PM +0200, Manuel Bouyer wrote:
> On Fri, Aug 24, 2018 at 04:59:16PM +0100, Patrick Welche wrote:
> > I updated the BIOS for an Asus Prime X370-PRO from version 3803 to 4012,
> > and now all of the real disks fail with "clearing WDCTL_RST failed".
> > 
> > The machine boots, because the M.2 "disk" is detected and works fine.
> > 
> > Given that BIOS updating happens by connecting to the internet and
> > being offered the most recent version, downgrading back to the
> > old working version might prove to be "interesting".
> > 
> > Any idea if something could be done in -current/amd64 instead?
> 
> The "timeout sending FIS" is the real problem.
> This is done in polling mode so is probably not an interrupt issue.
> Probably something changed in the AHCI controller setup by the BIOS, or
> some hardware protection (e.g. iommu) has been activated which prevents
> read/write to the controller.
> Could you check if the new bios has options to tune in this area ?

I can't remember all the options well enough to notice what changed.
I do see an iommu entry, set to "auto".

One thing: I think NetBSD is booting the kernel from one of the
real disks. The /boot.cfg is definitely not the one on the M.2.
That would explain why I get the root device: prompt. The problem
only appears when that kernel has its FIS timeout.

Cheers,

Patrick