Re: [PATCH 1/3] drm/xe/oa/uapi: Expose MERT OA unit

["Dixit, Ashutosh" <ashutosh.dixit@intel.com>]

On Mon, 08 Dec 2025 04:48:13 -0800, Rodrigo Vivi wrote:
>

Hi Rodrigo,

> On Fri, Dec 05, 2025 at 01:26:11PM -0800, Ashutosh Dixit wrote:
> > A MERT OA unit is available in the SoC on some platforms. Add support
> > for this OA unit and expose it to userspace. The MERT OA unit does not
> > have any HW engines attached, but is otherwise similar to an OAM unit.
> >
> > Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
> > Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
> > Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
> > diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h
> > index 876a076fa6c0c..f520462c28643 100644
> > --- a/include/uapi/drm/xe_drm.h
> > +++ b/include/uapi/drm/xe_drm.h
> > @@ -1675,6 +1675,9 @@ enum drm_xe_oa_unit_type {
> >
> >	/** @DRM_XE_OA_UNIT_TYPE_OAM_SAG: OAM_SAG OA unit */
> >	DRM_XE_OA_UNIT_TYPE_OAM_SAG,
> > +
> > +	/** @DRM_XE_OA_UNIT_TYPE_MERT: MERT OA unit */
> > +	DRM_XE_OA_UNIT_TYPE_MERT,
>
> And who&where is the usage here?

Sorry I just merged this. I will provide the MDAPI UMD pull request for
this when it is available. Hope this is ok.

This functionality (memory access counters) was part of OAG OA unit but is
now separated out into a separate OA unit on some platforms.

Thanks.
--
Ashutosh