Re: [Xen-devel] [PATCH 1/1] x86/AMD: Fix setup ssss:bb:dd:f for d0 failed

[Stefan Bader <stefan.bader@xxxxxxxxxxxxx>]

On 08.08.2013 14:29, Jan Beulich wrote:
>>>> On 08.08.13 at 14:07, Stefan Bader <stefan.bader@xxxxxxxxxxxxx> wrote:
>> On 08.08.2013 13:49, Jan Beulich wrote:
>>> Question is - did you in particular try with a legacy PCI device
>>> behind a legacy PCI bridge? That's the main scenario where the
>>> bridge not having got mapped could result in problems (see my
>>> other reply to Suravee on this thread).
>>
>> Not sure whether I confuse things here. Would the VGA card be what you 
>> meant?
> 
> If the output you provided was complete, then this really seems to
> be a legacy PCI device, so yes. But please realize that this working
> for you is not a guarantee that it's working in general - whether
> requests get forwarded by legacy bridges with the original requester
> ID or the bridge's is subject to the bridge implementation afaik. So a
> theoretical answer is going to be needed here anyway... But thanks
> for clarifying!

No, sure it is only one piece of the puzzle and a completing theoretical answer
is needed. Would not want to rely on any single testing.

-Stefan
> 
> Jan
> 
>> -[0000:00]-+-00.0  Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI 
>> bridg
>> e (external gfx0 port A) [1002:5a13]
>>            ...
>>            +-14.4-[04]----04.0  Matrox Electronics Systems Ltd. MGA G200eW
>> WPCM450 [102b:0532]
>>
>> 00:14.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI 
>> to
>> PCI Bridge [1002:4384] (prog-if 01 [Subtractive decode])
>>      Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
>> Stepping-
>> SERR+ FastB2B- DisINTx-
>>      Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
>> <TAbort-
>> <MAbort- >SERR- <PERR- INTx-
>>      Latency: 64
>>      Bus: primary=00, secondary=04, subordinate=04, sec-latency=64
>>      I/O behind bridge: 0000f000-00000fff
>>      Memory behind bridge: fdf00000-fe7fffff
>>      Prefetchable memory behind bridge: fc000000-fcffffff
>>      Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
>> <TAbort-
>> <MAbort+ <SERR- <PERR-
>>      BridgeCtl: Parity- SERR+ NoISA- VGA+ MAbort- >Reset- FastB2B-
>>              PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
>>
>> 04:04.0 VGA compatible controller [0300]: Matrox Electronics Systems Ltd. 
>> MGA
>> G200eW WPCM450 [102b:0532] (rev 0a) (prog-if 00 [VGA controller])
>>      Subsystem: Super Micro Computer Inc Device [15d9:a711]
>>      Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
>> Stepping-
>> SERR- FastB2B- DisINTx-
>>      Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
>> <TAbort-
>> <MAbort- >SERR- <PERR- INTx-
>>      Latency: 64 (4000ns min, 8000ns max), Cache Line Size: 64 bytes
>>      Interrupt: pin A routed to IRQ 10
>>      Region 0: Memory at fc000000 (32-bit, prefetchable) [size=16M]
>>      Region 1: Memory at fdffc000 (32-bit, non-prefetchable) [size=16K]
>>      Region 2: Memory at fe000000 (32-bit, non-prefetchable) [size=8M]
>>      Expansion ROM at <unassigned> [disabled]
>>      Capabilities: [dc] Power Management version 1
>>              Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
>> PME(D0-,D1-,D2-,D3hot-,D3cold-)
>>              Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
> 
> 
>

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