drm/v3d: Expose Super Pages capability

Add a new V3D parameter to expose the support of Super Pages to userspace. The userspace might want to know this information to apply optimizations that are specific to kernels with Super Pages enabled. Signed-off-by: Maíra Canal <mcanal@igalia.com> Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240923141348.2422499-12-mcanal@igalia.com
mariux64 · Sep 25, 2024 · 9f8e1c9 · 9f8e1c9
1 parent 0df4a13
commit 9f8e1c9
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diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -104,6 +104,9 @@ static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
 	case DRM_V3D_PARAM_MAX_PERF_COUNTERS:
 		args->value = v3d->perfmon_info.max_counters;
 		return 0;
+	case DRM_V3D_PARAM_SUPPORTS_SUPER_PAGES:
+		args->value = !!v3d->gemfs;
+		return 0;
 	default:
 		DRM_DEBUG("Unknown parameter %d\n", args->param);
 		return -EINVAL;

diff --git a/include/uapi/drm/v3d_drm.h b/include/uapi/drm/v3d_drm.h
@@ -290,6 +290,7 @@ enum drm_v3d_param {
 	DRM_V3D_PARAM_SUPPORTS_MULTISYNC_EXT,
 	DRM_V3D_PARAM_SUPPORTS_CPU_QUEUE,
 	DRM_V3D_PARAM_MAX_PERF_COUNTERS,
+	DRM_V3D_PARAM_SUPPORTS_SUPER_PAGES,
 };
 
 struct drm_v3d_get_param {