xhci support?

xhci support?

[walt]

Hi!  I have an amd64 machine with an add-on usb3 adapter which
works well with the linux xhci driver, but the machine's BIOS
doesn't see any disks in the usb3 docking station I use.

My (elderly) grub-1.99-rc1 also doesn't see the outboard usb3
drives, so grub is depending on the BIOS for disk detection(?)

Am I mis-configuring grub, maybe?  I see that grub sources, even
the latest 1.99, include ohci.c and uhci.c, but not xhci.c, so maybe
it's not supported yet?

Thanks!

Re: xhci support?

[Lennart Sorensen]

On Sat, May 12, 2012 at 06:48:29PM -0700, walt wrote:
> Hi!  I have an amd64 machine with an add-on usb3 adapter which
> works well with the linux xhci driver, but the machine's BIOS
> doesn't see any disks in the usb3 docking station I use.

It is very unlikely for the BIOS to have xhci support, and quite likely
doesn't even support USB add in cards, so getting USB boot from add in
cards is highly unlikely as far as I am aware.

> My (elderly) grub-1.99-rc1 also doesn't see the outboard usb3
> drives, so grub is depending on the BIOS for disk detection(?)

Don't know.

> Am I mis-configuring grub, maybe?  I see that grub sources, even
> the latest 1.99, include ohci.c and uhci.c, but not xhci.c, so maybe
> it's not supported yet?

I have never even looked at usb in grub, although I probably should at
some point.  Could be handy for bootable usb keys I suppose.

-- 
Len Sorensen

Re: xhci support?

[Aleš Nesrsta]

On Sat, May 12, 2012 at 06:48:29PM -0700, walt wrote:
> Hi!  I have an amd64 machine with an add-on usb3 adapter which
> works well with the linux xhci driver, but the machine's BIOS
> doesn't see any disks in the usb3 docking station I use.
> 
> My (elderly) grub-1.99-rc1 also doesn't see the outboard usb3
> drives, so grub is depending on the BIOS for disk detection(?)
> 
> Am I mis-configuring grub, maybe?  I see that grub sources, even
> the latest 1.99, include ohci.c and uhci.c, but not xhci.c, so maybe
> it's not supported yet?

XHCI is not supported yet, related driver does not exist in GRUB. So, it
is not possible to access any USB device connected to XHCI if XHCI is
not supported by BIOS (Your case...).

BR,
Ales

> 
> Thanks!
> 
> 
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> https://lists.gnu.org/mailman/listinfo/grub-devel