diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_engine.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_engine.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_engine.c b/drivers/gpu/drm/xe/xe_engine.c index edd1192f6ec5..8011f5827cbe 100644 --- a/drivers/gpu/drm/xe/xe_engine.c +++ b/drivers/gpu/drm/xe/xe_engine.c @@ -683,6 +683,29 @@ static void engine_kill_compute(struct xe_engine *e) up_write(&e->vm->lock); } +/** + * xe_engine_is_idle() - Whether an engine is idle. + * @engine: The engine + * + * FIXME: Need to determine what to use as the short-lived + * timeline lock for the engines, so that the return value + * of this function becomes more than just an advisory + * snapshot in time. The timeline lock must protect the + * seqno from racing submissions on the same engine. + * Typically vm->resv, but user-created timeline locks use the migrate vm + * and never grabs the migrate vm->resv so we have a race there. + * + * Return: True if the engine is idle, false otherwise. + */ +bool xe_engine_is_idle(struct xe_engine *engine) +{ + if (XE_WARN_ON(xe_engine_is_parallel(engine))) + return false; + + return xe_lrc_seqno(&engine->lrc[0]) == + engine->lrc[0].fence_ctx.next_seqno - 1; +} + void xe_engine_kill(struct xe_engine *e) { struct xe_engine *engine = e, *next; |