Re: Do we still need the scsi IPR driver ?

John Garry
2023-03-10T09:56:51Z

On 13/10/2022 04:36, Brian King wrote:
>>> I've made some progress. I was able to dig up the code to move ipr to use error_handler
>>> and have gotten it to compile, but haven't gotten to trying it in the lab yet.
>>>
>> Hmm. In which machines can I find an IPR installed? I could go hunting in our lab, maybe I can locate one and aid testing/development ...
> Any Power 9 or older generation PowerVM based system would have an IPR installed as the boot device.
> Additionally, on Power 10 systems, ipr SAS controllers are available as an add in card.
>
> However, the SATA support in ipr was only used to attach the onboard SATA DVD. Power 8 systems were
> the last generation of systems that had an onboard SATA DVD. So, to do any testing with a
> SATA DVD, you'd need a Power 8 or older system.
>
> Right now I have a patch that removes the SATA support from ipr completely and a patch that changes
> to use the error_handler libata support. The one that changes to use the error_handler libata API
> adds a bit of complexity for a function that should have few or no users that would need this support
> on a current upstream kernel, since only Power 8 and older systems use this support. I'm getting
> a system setup to try out both patches, but at this point I'm leaning towards the patch that
> removes the libata dependency from ipr.

Hi Brian,

I was just wondering did you ever get to test these patches you mention?
Or any other update on this topic?

Thanks,
John