Re: [Qemu-devel] DOS boot problem with LSI 53C895A SCSI controller and LSI option ROM

[Paolo Bonzini]

Il 12/11/2012 21:53, Gerhard Wiesinger ha scritto:
> On 12.11.2012 09:26, Paolo Bonzini wrote:
>> Il 10/11/2012 22:39, Gerhard Wiesinger ha scritto:
>>> Hello,
>>>
>>> I bisected down a DOS boot problem with LSI 53C895A SCSI controller and
>>> LSI option ROM to the following commit:
>>> e93176d55f1eb4be1a366b51afeaf4f4c8c31d75
>> The emulation is known to be incomplete; the option ROM is not really
>> supported, just like the support for the LSI controller in SeaBIOS is
>> not meant for real hardware.
> 
> 
> The option ROM worked perfect for legacy before this commit for years.
> 
>> But if this is a regression, I can look at it.  Problem is, I don't have
>> the option ROM and I don't think I can obtain one legally.  Please
>> provide at least a trace of the SCSI commands that are sent.
> 
> Yes, it is a regression problem.
> 
> You can download the option ROM from the LSI homepage:
> http://www.lsi.com/support/Pages/Download-Results.aspx?productcode=P00536&assettype=0&component=Storage%20Component&productfamily=0&productname=LSI53C895A
> 
> http://www.lsi.com/downloads/Public/Host%20Bus%20Adapters/Host%20Bus%20Adapters%20Common%20Files/lsi_bios.zip
> 
> http://www.lsi.com/downloads/Public/SCSI%20HBAs/SCSI%20HBAs%20Common%20Files/lsi_bios.zip
> 
> http://www.lsi.com/downloads/Public/SCSI%20ICs%20and%20Expanders/SCSI%20ICs%20and%20Expanders%20Common%20Files/lsi_bios.zip
> 
> http://www.lsi.com/downloads/Public/Obsolete/Obsolete%20Common%20Files/lsi_bios.zip
> 
> 
> Trace will follow (currently very busy). Best solution to turn it on?

To start with, use "#define DEBUG_SCSI" on hw/scsi-disk.c and "#define
DEBUG_LSI" in hw/lsi53c895a.c. Then rebuild.

(There are more tracing options in trace-events, but this one should be
enough in this case).

Paolo