[EXT] USB3 XHCI crashing with USB 3 hub on Octeon

[Mark Kettenis]

> From: Nicolas Saenz Julienne <nsaenzjulienne at suse.de>
> Date: Tue, 23 Feb 2021 10:23:04 +0100
> 
> On Tue, 2021-02-23 at 09:15 +0100, Stefan Roese wrote:
> > Hi Bin,
> > Hi Aaron,
> > 
> > I've added Nicolas to Cc, as he also recently did some work on the
> > physical vs virtual addresses in the xHCI driver.
> > 
> > On 23.02.21 09:07, Bin Meng wrote:
> > > Hi Aaron,
> > > 
> > > On Tue, Feb 23, 2021 at 3:31 PM Aaron Williams <awilliams at marvell.com> wrote:
> > > > 
> > > > I have a follow-up. USB is working on our OcteonTX boards running 2020.10. It
> > > > may be something specific to the Octeon port. Note that I did see a problem
> > > > where the scratchpad memory is using direct pointers instead of physical
> > > > addresses (which will not work on MIPS). As far as I know, however, the Octeon
> > > > XHCI controller does not use the scratchpad memory.
> > > > 
> > > 
> > > Do you plan to send a patch to convert the scratchpad pointer to
> > > physical address?
> > 
> > Nicolas, did your patch also address the scratchpad area (sorry for not
> > looking myself).
> 
> Yes, my patch took care of that :).

Ah cool.  I missed that patch.  Looks like this is exactly what I need
to cater for the translation done by the IOMMU on the Apple M1.

Won't be sending that patch then ;)