[Intel-xe] [PATCH v2 12/14] drm/xe/uapi: Add Tile ID information to the GT info query

[Francois Dugast]

On Fri, Nov 24, 2023 at 07:45:04PM +0100, Souza, Jose wrote:
> On Wed, 2023-11-22 at 14:38 +0000, Francois Dugast wrote:
> > From: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > 
> > As an information only. So Userspace can use this information
> > and be able to correlate different GTs.
> > 
> > Make API symmetric between Engine and GT info.
> > 
> > There's no need right now to include a tile_query entry
> > since there's no other information that we need from tile
> > that is not already exposed through different queries.
> > 
> > However, this could be added later if we have different Tile
> > information that could matter to userspace. But let's keep
> > the API ready for a direct reference to Tile ID based on
> > the GT entry.
> > 
> > Signed-off-by: Francois Dugast <francois.dugast at intel.com>
> > Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > ---
> >  drivers/gpu/drm/xe/xe_query.c | 1 +
> >  include/uapi/drm/xe_drm.h     | 2 ++
> >  2 files changed, 3 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/xe/xe_query.c b/drivers/gpu/drm/xe/xe_query.c
> > index 77cab66d337f..095f1b8c2290 100644
> > --- a/drivers/gpu/drm/xe/xe_query.c
> > +++ b/drivers/gpu/drm/xe/xe_query.c
> > @@ -376,6 +376,7 @@ static int query_gt_list(struct xe_device *xe, struct drm_xe_device_query *query
> >  			gt_list->gt_list[id].type = DRM_XE_QUERY_GT_TYPE_MEDIA;
> >  		else
> >  			gt_list->gt_list[id].type = DRM_XE_QUERY_GT_TYPE_MAIN;
> > +		gt_list->gt_list[id].tile_id = gt_to_tile(gt)->id;
> >  		gt_list->gt_list[id].gt_id = gt->info.id;
> >  		gt_list->gt_list[id].reference_clock = gt->info.reference_clock;
> >  		if (!IS_DGFX(xe))
> > diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h
> > index 4bad84e7793f..b0ef1f62fd99 100644
> > --- a/include/uapi/drm/xe_drm.h
> > +++ b/include/uapi/drm/xe_drm.h
> > @@ -377,6 +377,8 @@ struct drm_xe_gt {
> >  #define DRM_XE_QUERY_GT_TYPE_MEDIA		1
> >  	/** @type: GT type: Main or Media */
> >  	__u16 type;
> > +	/** @tile_id: Tile ID where this GT lives (Information only) */
> > +	__u16 tile_id;
> >  	/** @gt_id: Unique ID of this GT within the PCI Device */
> >  	__u16 gt_id;
> >  	/** @reference_clock: A clock frequency for timestamp */
> 
> change is good but it broke the alignment of a struct that was aligned 

True but this and other misalignments are fix in the next patch of this
series "drm/xe/uapi: Fix various struct padding for 64b alignment".