[BETA testing] USB 3.0 Super Speed support in FreeBSD

[Hans Petter Selasky]

Hi,

During the last two weeks I've been working hard to get USB 3.0 support added 
to the FreeBSD 8+ USB stack. There are a couple of issues left, but right now 
the code is in a state were enumeration of USB devices is possible and there 
are no dirty hacks :-)

The XHCI chip, which is the PCI interface for USB 3.0, is a replacement for 
OHCI/UHCI/EHCI and can also drive USB Super Speed (4.8 Gbps). I expect there 
to be a througput and performance increase when switching over to the XHCI 
interface also for 2.0 compatible devices, because it has a better data 
queuing mechanism.

Currently all code has been committed to the USB P4 project at FreeBSD.org. 
You need to copy all files under sys/dev/usb + sys/modules/usb/xhci into 8-
stable for example, and then build a new kernel. You need to manually to cd 
into sys/modules/usb/xhci and type make all install after you built the 
kernel.

Reference:
http://p4db.freebsd.org/changeList.cgi?FSPC=%2F%2Fdepot%2Fprojects%2Fusb%2Fsrc%2F...&USERS=hselasky&ignore=GO!

Comments are welcome!

--HPS