diff options
| -rw-r--r-- | drivers/gpu/drm/scheduler/sched_main.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index eeaf71d43191..7ce25281c74c 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -1350,6 +1350,19 @@ EXPORT_SYMBOL(drm_sched_init); * @sched: scheduler instance * * Tears down and cleans up the scheduler. + * + * This stops submission of new jobs to the hardware through + * drm_sched_backend_ops.run_job(). Consequently, drm_sched_backend_ops.free_job() + * will not be called for all jobs still in drm_gpu_scheduler.pending_list. + * There is no solution for this currently. Thus, it is up to the driver to make + * sure that + * a) drm_sched_fini() is only called after for all submitted jobs + * drm_sched_backend_ops.free_job() has been called or that + * b) the jobs for which drm_sched_backend_ops.free_job() has not been called + * after drm_sched_fini() ran are freed manually. + * + * FIXME: Take care of the above problem and prevent this function from leaking + * the jobs in drm_gpu_scheduler.pending_list under any circumstances. */ void drm_sched_fini(struct drm_gpu_scheduler *sched) { @@ -1445,8 +1458,10 @@ EXPORT_SYMBOL(drm_sched_wqueue_ready); /** * drm_sched_wqueue_stop - stop scheduler submission - * * @sched: scheduler instance + * + * Stops the scheduler from pulling new jobs from entities. It also stops + * freeing jobs automatically through drm_sched_backend_ops.free_job(). */ void drm_sched_wqueue_stop(struct drm_gpu_scheduler *sched) { @@ -1458,8 +1473,12 @@ EXPORT_SYMBOL(drm_sched_wqueue_stop); /** * drm_sched_wqueue_start - start scheduler submission - * * @sched: scheduler instance + * + * Restarts the scheduler after drm_sched_wqueue_stop() has stopped it. + * + * This function is not necessary for 'conventional' startup. The scheduler is + * fully operational after drm_sched_init() succeeded. */ void drm_sched_wqueue_start(struct drm_gpu_scheduler *sched) { |