[PATCH v2 4/8] drm/sched: Add new test for DRM_GPU_SCHED_STAT_NO_HANG

[Maíra Canal]

Add a test to submit a single job against a scheduler with the timeout
configured and verify that if the job is still running, the timeout
handler will skip the reset and allow the job to complete.

Signed-off-by: Maíra Canal <mcanal at igalia.com>
---
 drivers/gpu/drm/scheduler/tests/mock_scheduler.c |  5 +++
 drivers/gpu/drm/scheduler/tests/sched_tests.h    |  1 +
 drivers/gpu/drm/scheduler/tests/tests_basic.c    | 43 ++++++++++++++++++++++++
 3 files changed, 49 insertions(+)

diff --git a/drivers/gpu/drm/scheduler/tests/mock_scheduler.c b/drivers/gpu/drm/scheduler/tests/mock_scheduler.c
index fdf5f34b39e02c8a8648d8bea566a27fd3251516..39429f5cd19ee3c23816f257d566b47d3daa4baa 100644
--- a/drivers/gpu/drm/scheduler/tests/mock_scheduler.c
+++ b/drivers/gpu/drm/scheduler/tests/mock_scheduler.c
@@ -208,6 +208,11 @@ mock_sched_timedout_job(struct drm_sched_job *sched_job)
 
 	job->flags |= DRM_MOCK_SCHED_JOB_TIMEDOUT;
 
+	if (job->flags & DRM_MOCK_SCHED_JOB_DONT_RESET) {
+		job->flags &= ~DRM_MOCK_SCHED_JOB_DONT_RESET;
+		return DRM_GPU_SCHED_STAT_NO_HANG;
+	}
+
 	return DRM_GPU_SCHED_STAT_RESET;
 }
 
diff --git a/drivers/gpu/drm/scheduler/tests/sched_tests.h b/drivers/gpu/drm/scheduler/tests/sched_tests.h
index 27caf8285fb74b9f3c9ce2daa1c44d4a0c967e92..5259f181e55387c41efbcd3f6addc9465331d787 100644
--- a/drivers/gpu/drm/scheduler/tests/sched_tests.h
+++ b/drivers/gpu/drm/scheduler/tests/sched_tests.h
@@ -98,6 +98,7 @@ struct drm_mock_sched_job {
 
 #define DRM_MOCK_SCHED_JOB_DONE		0x1
 #define DRM_MOCK_SCHED_JOB_TIMEDOUT	0x2
+#define DRM_MOCK_SCHED_JOB_DONT_RESET	0x4
 	unsigned long		flags;
 
 	struct list_head	link;
diff --git a/drivers/gpu/drm/scheduler/tests/tests_basic.c b/drivers/gpu/drm/scheduler/tests/tests_basic.c
index 41c648782f4548e202bd8711b45d28eead9bd0b2..2ba2d1b0c3cad9626ab9d89cfae05244c670a826 100644
--- a/drivers/gpu/drm/scheduler/tests/tests_basic.c
+++ b/drivers/gpu/drm/scheduler/tests/tests_basic.c
@@ -246,8 +246,51 @@ static void drm_sched_basic_timeout(struct kunit *test)
 	drm_mock_sched_entity_free(entity);
 }
 
+static void drm_sched_skip_reset(struct kunit *test)
+{
+	struct drm_mock_scheduler *sched = test->priv;
+	struct drm_mock_sched_entity *entity;
+	struct drm_mock_sched_job *job;
+	bool done;
+
+	/*
+	 * Submit a single job against a scheduler with the timeout configured
+	 * and verify that if the job is still running, the timeout handler
+	 * will skip the reset and allow the job to complete.
+	 */
+
+	entity = drm_mock_sched_entity_new(test,
+					   DRM_SCHED_PRIORITY_NORMAL,
+					   sched);
+	job = drm_mock_sched_job_new(test, entity);
+
+	job->flags = DRM_MOCK_SCHED_JOB_DONT_RESET;
+
+	drm_mock_sched_job_set_duration_us(job, jiffies_to_usecs(2 * MOCK_TIMEOUT));
+	drm_mock_sched_job_submit(job);
+
+	done = drm_mock_sched_job_wait_finished(job, MOCK_TIMEOUT);
+	KUNIT_ASSERT_FALSE(test, done);
+
+	KUNIT_ASSERT_EQ(test,
+			job->flags & DRM_MOCK_SCHED_JOB_TIMEDOUT,
+			DRM_MOCK_SCHED_JOB_TIMEDOUT);
+
+	KUNIT_ASSERT_EQ(test,
+			job->flags & DRM_MOCK_SCHED_JOB_DONT_RESET,
+			0);
+
+	KUNIT_ASSERT_FALSE(test, list_empty(&sched->job_list));
+
+	done = drm_mock_sched_job_wait_finished(job, MOCK_TIMEOUT);
+	KUNIT_ASSERT_TRUE(test, done);
+
+	drm_mock_sched_entity_free(entity);
+}
+
 static struct kunit_case drm_sched_timeout_tests[] = {
 	KUNIT_CASE(drm_sched_basic_timeout),
+	KUNIT_CASE(drm_sched_skip_reset),
 	{}
 };
 

-- 
2.49.0