Can you use a USB3.0 hub?

[Hans Petter Selasky]

On Thursday 12 January 2012 07:15:17 Kohji Okuno wrote:
> Hi,
> 
> Can you use a USB3.0 hub?
> 
> I tried a USB3.0 hub (BUFFALO BSH4A04U3BK).
> And I used 8-stable and PCI-E card (BUFFALO IFC-PCIE2U3)
> 
> The hub is for only japanese market.
> The card is NEC’s 720200 chip
> http://www.buffalotech.com/products/accessories/interface-card-adapters/usb
> -30-pci-express-interface-card/
> 
> 
> The kernel could not recognize USB3.0 HDD that connected to this hub
> as the following log. But, the kernel could reconize USB2.0 HDD that
> connected to this hub.
> 
> Regards,
>  Kohji Okuno

Hi,

There is a problem with USB 3.0 HUBs, most likely something related to the 
XHCI route string or USB HUB set depth.

I don't have a USB 3.0 analyzer, so I cannot find this out quickly. If you 
could help debug, would be great. Here is a patch which you can put on top of 
8/9- or 10- stable:

http://svn.freebsd.org/changeset/base/230032

It fixes a few issues, but not all.

--HPS