Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: cgroups@xxxxxxxxxxxxxxx
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
include/drm/drm_file.h | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h
index 0e0c868451a5..08855a99069c 100644
--- a/include/drm/drm_file.h
+++ b/include/drm/drm_file.h
@@ -32,6 +32,7 @@
#include <linux/types.h>
#include <linux/completion.h>
+#include <linux/cgroup.h>
#include <uapi/drm/drm.h>
@@ -378,4 +379,31 @@ void drm_event_cancel_free(struct drm_device *dev,
void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
+#ifdef CONFIG_CGROUPS
+/**
+ * drm_file_get_cgroup - obtain cgroup for drm_file's owning process
+ * @file_priv: DRM file
+ * @root: cgroup hierarchy to search for process in
+ *
+ * Obtains the cgroup from a specific hierarchy that the drm_file's owning
+ * process belongs to. The cgroup may be used to set driver-specific
+ * policy (priority, vram usage, etc.).
+ */
+static inline struct cgroup *
+drm_file_get_cgroup(struct drm_file *file_priv, struct cgroup_root *root)
+{
+ struct task_struct *task = pid_task(file_priv->pid, PIDTYPE_PID);
+ struct cgroup *cgrp;
+
+ mutex_lock(&cgroup_mutex);
+ cgrp = task_cgroup_from_root(task, root);
+ mutex_unlock(&cgroup_mutex);
+
+ return cgrp;
+}
+#else
+static inline struct cgroup *
+drm_file_get_cgroup(struct drm_file *file_priv) { return NULL; }
+#endif
+
#endif /* _DRM_FILE_H_ */
--
2.14.3
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