[PATCH 2/5] drm/xe/oa: Print hwe to OA unit mapping

[Dixit, Ashutosh]

On Wed, 04 Jun 2025 16:49:11 -0700, Umesh Nerlige Ramappa wrote:
>
> On Tue, Jun 03, 2025 at 01:21:30PM -0700, Ashutosh Dixit wrote:
> > Print hwe to OA unit mapping to dmesg, to help debug for current and new
> > platforms.
> >
> > Signed-off-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
> > ---
> > drivers/gpu/drm/xe/xe_oa.c | 27 +++++++++++++++++++++++++++
> > 1 file changed, 27 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c
> > index 0de0d5a18df74..94faa4ed2012f 100644
> > --- a/drivers/gpu/drm/xe/xe_oa.c
> > +++ b/drivers/gpu/drm/xe/xe_oa.c
> > @@ -2603,6 +2603,31 @@ static int xe_oa_init_gt(struct xe_gt *gt)
> >	return 0;
> > }
> >
> > +static void xe_oa_print_oa_units(struct xe_oa *oa)
> > +{
> > +	enum xe_hw_engine_id hwe_id;
> > +	struct xe_hw_engine *hwe;
> > +	struct xe_oa_unit *u;
> > +	struct xe_gt *gt;
> > +	int gt_id, i, n;
> > +	char buf[256];
> > +
> > +	for_each_gt(gt, oa->xe, gt_id) {
> > +		for (i = 0; i < gt->oa.num_oa_units; i++) {
> > +			u = &gt->oa.oa_unit[i];
> > +			buf[0] = '\0';
> > +			n = 0;
> > +
> > +			for_each_hw_engine(hwe, gt, hwe_id)
> > +				if (xe_oa_unit_id(hwe) == u->oa_unit_id)
> > +					n += scnprintf(buf + n, sizeof(buf) - n, "%s ", hwe->name);
> > +
> > +			xe_gt_dbg(gt, "oa_unit %d, type %d, Engines: %s\n",
> > +				  u->oa_unit_id, u->type, buf);
> > +		}
> > +	}
> > +}
> > +
>
> nit: I would at least move one of the inner for loops outside to a separate
> helper.

Separated out the first inner loop into xe_oa_print_gt_oa_units().

>
> otherwise, LGTM
>
> Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>

Thanks.
--
Ashutosh


>
> > static int xe_oa_init_oa_units(struct xe_oa *oa)
> > {
> >	struct xe_gt *gt;
> > @@ -2619,6 +2644,8 @@ static int xe_oa_init_oa_units(struct xe_oa *oa)
> >			return ret;
> >	}
> >
> > +	xe_oa_print_oa_units(oa);
> > +
> >	return 0;
> > }
> >
> > --
> > 2.48.1
> >