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Subject: Re: [Qemu-devel] Fwd: [question] About MSI for vioscsi
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To: Vadim Rozenfeld <vrozenfe@redhat.com>
Cc: qemu-devel <qemu-devel@nongnu.org>



On 2015-1-8 18:03, Vadim Rozenfeld wrote:
> On Thu, 2015-01-08 at 17:27 +0800, Wangting (Kathy) wrote:
>>
>> On 2015-1-8 17:01, Vadim Rozenfeld wrote:
>>> On Thu, 2015-01-08 at 16:40 +0800, Wangting (Kathy) wrote:
>>>> Hi Vadim,
>>>>
>>>>    In order to enable MSI for vioscsi in virtio-win-0.1-74, I try to merge
>>>>
>>>> the patch about Bug 1077566 into it, but I find that MSI still doesn't work,
>>>>
>>>> because the value of IRQ is not negative in the device manager.
>>>>
>>>>    I try to trace the I/O path with ENABLE_COM_DEBUG, and I find that
>>>>
>>>> pMsixCapOffset->MessageControl.MSIXEnable is zero when
>>>>
>>>> StorPortGetBusData returned in VioScsiFindAdapter, so MSI can't be enabled.
>>>>
>>>>    I have tested that MSI is successfully enabled in virtio-win-0.1-81.
>>>>
>>>> But I still want to find out why the patch is not work in virtio-win-0.1-74.
>>>>
>>>> Is there some important points I missed?
>>>
>>> Did you enable MSISupported in inf file?
>>>
>>> Cheers,
>>> Vadim.
>>>
>> Where is the inf file? Do you mean qemupciserial.inf?
> 
> vioscsi.inx in the source directory. After stamping,
> it will be copied into vioscsi.inf, as part of build
> process.
> 
> 

Sorry, I forget to update vioscsi.inf after compiling. The patch is OK.

Thanks.

Ting

>>>>
>>>>    Thank you very much.
>>>>
>>>>    Best wishes,
>>>>
>>>>    Ting Wang
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
> 
> 
> 
>