From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Add a new callback via which the drm cgroup controller is notifying the
drm core that a certain process is above its allotted GPU time.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
include/drm/drm_drv.h | 8 ++++++++
kernel/cgroup/drm.c | 16 ++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 3116fa4dbc48..29e11a87bf75 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -167,6 +167,14 @@ struct drm_cgroup_ops {
* Used by the DRM core when queried by the DRM cgroup controller.
*/
u64 (*active_time_us) (struct drm_file *);
+
+ /**
+ * @signal_budget:
+ *
+ * Optional callback used by the DRM core to forward over/under GPU time
+ * messages sent by the DRM cgroup controller.
+ */
+ int (*signal_budget) (struct drm_file *, u64 used, u64 budget);
};
/**
diff --git a/kernel/cgroup/drm.c b/kernel/cgroup/drm.c
index acdb76635b60..68f31797c4f0 100644
--- a/kernel/cgroup/drm.c
+++ b/kernel/cgroup/drm.c
@@ -51,6 +51,22 @@ static u64 drmcs_get_active_time_us(struct drm_cgroup_state *drmcs)
return total;
}
+static void
+drmcs_signal_budget(struct drm_cgroup_state *drmcs, u64 usage, u64 budget)
+{
+ struct drm_file *fpriv;
+
+ lockdep_assert_held(&drmcg_mutex);
+
+ list_for_each_entry(fpriv, &drmcs->clients, clink) {
+ const struct drm_cgroup_ops *cg_ops =
+ fpriv->minor->dev->driver->cg_ops;
+
+ if (cg_ops && cg_ops->signal_budget)
+ cg_ops->signal_budget(fpriv, usage, budget);
+ }
+}
+
static void drmcs_free(struct cgroup_subsys_state *css)
{
struct drm_cgroup_state *drmcs = css_to_drmcs(css);
--
2.39.2
