12 Jun
2013
12 Jun
'13
5:16 p.m.
Hi Alex,
In my opinion, a simple fix is to remove the two lines in _find_next() function in pci_session_component.h
If (!bus_valid(bus)) Continue;
Another way is to scan all buses/devices/functions at the first call of bus_valid(). A simple three level loop will do.
Best, Jilong
--
Jilong Kuang Ph.D. C.Sci. | Samsung Research America - Silicon Valley (SRA-SV)
Senior Research Engineer, Computer Science Lab
t: 408-544-2705 c: 951-318-2995
jilong.kuang@...60...
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-----Original Message-----
From: Alexander Boettcher [mailto:alexander.boettcher@...1...]
Sent: Wednesday, June 12, 2013 5:11 AM
To: Genode OS Framework Mailing List
Subject: Re: Pci driver can not handle multiple root complex system
Hello,
On 08.06.2013 01:13, Jilong Kuang - SISA wrote:
> I just found out current Genode pci driver does not support a system
> with multiple root complexes.
yes, this is true.
Until now we had neither the demand nor the hardware to develop for this feature.
I suggest to open at Genode@...197... a feature request. If you have any insights or pointers to some public low level documentation about multiple PCI root complexes in regards to how to use, to handle them, it would be nice to share these information at the github feature request.
Regards,
Alex.
>
>
>
> More specifically, in the bus_valid() function, it only scans all the
> devices under the first root complex (starting from bus number 0). As
> a result, other devices under different root complexes are considered
> INVALID, thus will be skipped by pci driver code.
>
>
>
> Maybe a simple patch will fix the problem.
>
>
>
> Best regards,
>
> Jilong
>
>
>
>
>
> --
> *Jilong Kuang Ph.D. C.Sci. | Samsung Research America - Silicon Valley
> (SRA-SV)*
>
> Senior Research Engineer, Computer Science Lab
> t: 408-544-2705 c: 951-318-2995
> jilong.kuang@...60... mailto:jilong.kuang@...60...
>
> *P*lease consider the environment before printing this email.
>
> This message is intended only for the named recipient(s) above and may
> contain confidential or privileged information or protected attorney
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> have received this message in error, please immediately notify the
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>
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