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Message-ID: <20250709115257.106370-4-phasta@kernel.org>
Date: Wed, 9 Jul 2025 13:52:52 +0200
From: Philipp Stanner <phasta@...nel.org>
To: Lyude Paul <lyude@...hat.com>,
Danilo Krummrich <dakr@...nel.org>,
David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>,
Matthew Brost <matthew.brost@...el.com>,
Philipp Stanner <phasta@...nel.org>,
Christian König <ckoenig.leichtzumerken@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Sumit Semwal <sumit.semwal@...aro.org>,
Tvrtko Ursulin <tvrtko.ursulin@...lia.com>,
Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
Cc: dri-devel@...ts.freedesktop.org,
nouveau@...ts.freedesktop.org,
linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org
Subject: [PATCH v3 2/7] drm/sched/tests: Implement cancel_job() callback
The GPU Scheduler now supports a new callback, cancel_job(), which lets
the scheduler cancel all jobs which might not yet be freed when
drm_sched_fini() runs. Using this callback allows for significantly
simplifying the mock scheduler teardown code.
Implement the cancel_job() callback and adjust the code where necessary.
Signed-off-by: Philipp Stanner <phasta@...nel.org>
---
.../gpu/drm/scheduler/tests/mock_scheduler.c | 68 +++++++------------
drivers/gpu/drm/scheduler/tests/sched_tests.h | 1 -
2 files changed, 25 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/scheduler/tests/mock_scheduler.c b/drivers/gpu/drm/scheduler/tests/mock_scheduler.c
index 49d067fecd67..0d1d57213e05 100644
--- a/drivers/gpu/drm/scheduler/tests/mock_scheduler.c
+++ b/drivers/gpu/drm/scheduler/tests/mock_scheduler.c
@@ -63,7 +63,7 @@ static void drm_mock_sched_job_complete(struct drm_mock_sched_job *job)
lockdep_assert_held(&sched->lock);
job->flags |= DRM_MOCK_SCHED_JOB_DONE;
- list_move_tail(&job->link, &sched->done_list);
+ list_del(&job->link);
dma_fence_signal_locked(&job->hw_fence);
complete(&job->done);
}
@@ -236,26 +236,41 @@ mock_sched_timedout_job(struct drm_sched_job *sched_job)
static void mock_sched_free_job(struct drm_sched_job *sched_job)
{
- struct drm_mock_scheduler *sched =
- drm_sched_to_mock_sched(sched_job->sched);
struct drm_mock_sched_job *job = drm_sched_job_to_mock_job(sched_job);
- unsigned long flags;
- /* Remove from the scheduler done list. */
- spin_lock_irqsave(&sched->lock, flags);
- list_del(&job->link);
- spin_unlock_irqrestore(&sched->lock, flags);
dma_fence_put(&job->hw_fence);
-
drm_sched_job_cleanup(sched_job);
/* Mock job itself is freed by the kunit framework. */
}
+static void mock_sched_cancel_job(struct drm_sched_job *sched_job)
+{
+ struct drm_mock_scheduler *sched = drm_sched_to_mock_sched(sched_job->sched);
+ struct drm_mock_sched_job *job = drm_sched_job_to_mock_job(sched_job);
+ unsigned long flags;
+
+ hrtimer_cancel(&job->timer);
+
+ spin_lock_irqsave(&sched->lock, flags);
+ if (!dma_fence_is_signaled_locked(&job->hw_fence)) {
+ list_del(&job->link);
+ dma_fence_set_error(&job->hw_fence, -ECANCELED);
+ dma_fence_signal_locked(&job->hw_fence);
+ }
+ spin_unlock_irqrestore(&sched->lock, flags);
+
+ /*
+ * The GPU Scheduler will call drm_sched_backend_ops.free_job(), still.
+ * Mock job itself is freed by the kunit framework.
+ */
+}
+
static const struct drm_sched_backend_ops drm_mock_scheduler_ops = {
.run_job = mock_sched_run_job,
.timedout_job = mock_sched_timedout_job,
- .free_job = mock_sched_free_job
+ .free_job = mock_sched_free_job,
+ .cancel_job = mock_sched_cancel_job,
};
/**
@@ -289,7 +304,6 @@ struct drm_mock_scheduler *drm_mock_sched_new(struct kunit *test, long timeout)
sched->hw_timeline.context = dma_fence_context_alloc(1);
atomic_set(&sched->hw_timeline.next_seqno, 0);
INIT_LIST_HEAD(&sched->job_list);
- INIT_LIST_HEAD(&sched->done_list);
spin_lock_init(&sched->lock);
return sched;
@@ -304,38 +318,6 @@ struct drm_mock_scheduler *drm_mock_sched_new(struct kunit *test, long timeout)
*/
void drm_mock_sched_fini(struct drm_mock_scheduler *sched)
{
- struct drm_mock_sched_job *job, *next;
- unsigned long flags;
- LIST_HEAD(list);
-
- drm_sched_wqueue_stop(&sched->base);
-
- /* Force complete all unfinished jobs. */
- spin_lock_irqsave(&sched->lock, flags);
- list_for_each_entry_safe(job, next, &sched->job_list, link)
- list_move_tail(&job->link, &list);
- spin_unlock_irqrestore(&sched->lock, flags);
-
- list_for_each_entry(job, &list, link)
- hrtimer_cancel(&job->timer);
-
- spin_lock_irqsave(&sched->lock, flags);
- list_for_each_entry_safe(job, next, &list, link)
- drm_mock_sched_job_complete(job);
- spin_unlock_irqrestore(&sched->lock, flags);
-
- /*
- * Free completed jobs and jobs not yet processed by the DRM scheduler
- * free worker.
- */
- spin_lock_irqsave(&sched->lock, flags);
- list_for_each_entry_safe(job, next, &sched->done_list, link)
- list_move_tail(&job->link, &list);
- spin_unlock_irqrestore(&sched->lock, flags);
-
- list_for_each_entry_safe(job, next, &list, link)
- mock_sched_free_job(&job->base);
-
drm_sched_fini(&sched->base);
}
diff --git a/drivers/gpu/drm/scheduler/tests/sched_tests.h b/drivers/gpu/drm/scheduler/tests/sched_tests.h
index fbba38137f0c..0eddfb8d89e6 100644
--- a/drivers/gpu/drm/scheduler/tests/sched_tests.h
+++ b/drivers/gpu/drm/scheduler/tests/sched_tests.h
@@ -49,7 +49,6 @@ struct drm_mock_scheduler {
spinlock_t lock;
struct list_head job_list;
- struct list_head done_list;
struct {
u64 context;
--
2.49.0
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