[Qemu-devel] Firewire/IEEE1394 OHCI for QEMU

[Qemu-devel] Firewire/IEEE1394 OHCI for QEMU

[Peter McCormick]

Hello all,

I'm working to create an OHCI-compliant Firewire virtual device for 
QEMU. There is not a solid story on how to connect the guest device to 
the host operating systems' Firewire stack, but I might end up modifying 
the Linux ohci1394 kernel module to allow for a more generic passthru 
interface (for those familiar with krh's "nosy" sniffer, something in 
that direction, albeit with the OHCI no-snoop-mode limitations.)

http://github.com/pmccormick/qemu-firewire-ohci/tree/ohci1394
(it is forked from of git://repo.or.cz/qemu.git, which I periodically 
rebase off of)

At the moment I am still very early on in the implementation, not even 
DMA contexts for async/iso are functional yet. But I have been inching 
along getting Windows XP and Linux guests to recognize the presence of 
an OHCI device.

If anyone has experience with this stuff, or an interest to help, please 
get in touch!!

Cheers,
Peter

Re: [Qemu-devel] Firewire/IEEE1394 OHCI for QEMU

[Jamie Lokier]

Peter McCormick wrote:
> At the moment I am still very early on in the implementation, not even 
> DMA contexts for async/iso are functional yet. But I have been inching 
> along getting Windows XP and Linux guests to recognize the presence of 
> an OHCI device.

Is this the same OHCI which is used for USB?  If so, it is useful to
share any of the code from the existing UHCI and EHCI USB emulation,
and also is it useful to think about attaching to USB devices (as well
as Fireware) from your OHCI emulation?

-- Jamie

Re: [Qemu-devel] Firewire/IEEE1394 OHCI for QEMU

[M. Warner Losh]

In message: <20090412184718.GD4394@shareable.org>
            Jamie Lokier <jamie@shareable.org> writes:
: Peter McCormick wrote:
: > At the moment I am still very early on in the implementation, not even 
: > DMA contexts for async/iso are functional yet. But I have been inching 
: > along getting Windows XP and Linux guests to recognize the presence of 
: > an OHCI device.
: 
: Is this the same OHCI which is used for USB?  If so, it is useful to
: share any of the code from the existing UHCI and EHCI USB emulation,
: and also is it useful to think about attaching to USB devices (as well
: as Fireware) from your OHCI emulation?

No.  It is just the same name.

Warner

[Qemu-devel] Re: Firewire/IEEE1394 OHCI for QEMU

[Julian Stecklina]

Peter McCormick <pete@blonos.com> writes:

> Hello all,
>
> I'm working to create an OHCI-compliant Firewire virtual device for
> QEMU. There is not a solid story on how to connect the guest device to
> the host operating systems' Firewire stack, but I might end up
> modifying the Linux ohci1394 kernel module to allow for a more generic
> passthru interface (for those familiar with krh's "nosy" sniffer,
> something in that direction, albeit with the OHCI no-snoop-mode
> limitations.)

This is great news. :)

Regards,
-- 
Julian Stecklina

The day Microsoft makes something that doesn't suck is probably the day
they start making vacuum cleaners - Ernst Jan Plugge