Re: umass problem with xhci (USB 3)

[Takahiro Hayashi <t425hash%gmail.com@localhost>]

Hi,

On 2016/06/04 09:34, Paul Goyette wrote:
> With a kernel built from sources dated 2016-05-29 at 23:57:35 UTC, when attaching my external hard drive (near-line backup device), I get the following messages:
>
> uhub0 at usb0: vendor 8086 xHCI Root Hub, class 9/0, rev 1.00/1.00, addr 0
> ...
> Jun  4 08:21:37 pokey /netbsd: umass0 at uhub0 port 2 configuration 1 interface 0
> Jun  4 08:21:37 pokey /netbsd: umass0: Western Digital Ext HDD 1021, rev 2.00/20.02, addr 24
> Jun  4 08:21:37 pokey /netbsd: umass0: using SCSI over Bulk-Only
> Jun  4 08:21:37 pokey /netbsd: umass0: failed to create xfers
>
> Interestingly, even though this motherboard has both USB2 and USB3 ports, and dmesg includes
>
> uhub1 at usb1: vendor 8086 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
> ...
> uhub2 at uhub1 port 1: vendor 8087 product 8000, class 9/0, rev 2.00/0.05, addr2
>
> but every device I plug in, regardless of USB connector, gets attached to uhub0 (the one for xHCI)!  So I cannot get the external drive to work by connecting to a USB2 port.
>
> Any suggestions?

To avoid the problem, please add "userconf=disable xhci*" to /boot.cfg.

The xhci driver tries to route all USB ports (even 2.0) to xhci
as possible if it's Intel PCH. (see sys/dev/pci/xhci_pci.c)
You can see some information about port routing by booting kernel -x.


--
t-hash