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

[Stefan Roese]

On 23.02.21 14:57, Aaron Williams wrote:
I am using the latest pull and it's still crashing.

Now that I have a (free) USB 3 hub I can reproduce this issue. With
latest TOT I get this:

=> usb start
starting USB...
Bus xhci@1680000000000: Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.00
Bus xhci@1690000000000: Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.00
scanning bus xhci@1680000000000 for devices...
Warning: asix_eth MAC addresses don't match:
Address in ROM is               00:0e:c6:b2:7e:cb
Address in environment is       02:3f:73:97:d1:00
2 USB Device(s) found
scanning bus xhci@1690000000000 for devices... Device not responding to 
set address.

      USB device not accepting new address (error=80000000)
WARN halted endpoint, queueing URB anyway.
Unexpected XHCI event TRB, skipping... (0eebc260 00000000 13000000 01008401)
BUG at drivers/usb/host/xhci-ring.c:503/abort_td()!
BUG!
resetting ...

As Aaron already mentioned, this only happens when an USB 3 hub is
present in the setup. I'll try to dig into this tomorrow but perhaps
someone else has some quick ideas?

Thanks,
Stefan

-Aaron

On Tuesday, February 23, 2021 2:39:41 AM PST Stefan Roese wrote:
On 23.02.21 11:36, Mark Kettenis wrote:
From: Nicolas Saenz Julienne <nsaenzjulie...@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 <awilli...@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 ;)

Nice.

Aaron, it might be that you missed this patch series with your latest
mainline xHCI tests a few days ago. Could you please try again with
current mainline and report back, if this changes the behavior on
Octeon MIPS with USB3 hubs?

Thanks,
Stefan






Viele Grüße,
Stefan

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