diff mbox series

[RFC,4/4] drm/scheduler: Add fence deadline support

Message ID 20210726233854.2453899-5-robdclark@gmail.com (mailing list archive)
State Not Applicable, archived
Headers
Series dma-fence: Deadline awareness |

Commit Message

Rob Clark July 26, 2021, 11:38 p.m. UTC 
  From: Rob Clark <robdclark@chromium.org>

As the finished fence is the one that is exposed to userspace, and
therefore the one that other operations, like atomic update, would
block on, we need to propagate the deadline from from the finished
fence to the actual hw fence.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/scheduler/sched_fence.c | 10 ++++++++++
 drivers/gpu/drm/scheduler/sched_main.c  |  3 +++
 2 files changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/scheduler/sched_fence.c b/drivers/gpu/drm/scheduler/sched_fence.c
index 69de2c76731f..3aa6351d2101 100644
--- a/drivers/gpu/drm/scheduler/sched_fence.c
+++ b/drivers/gpu/drm/scheduler/sched_fence.c
@@ -128,6 +128,15 @@  static void drm_sched_fence_release_finished(struct dma_fence *f)
 	dma_fence_put(&fence->scheduled);
 }
 
+static void drm_sched_fence_set_deadline_finished(struct dma_fence *f,
+						  ktime_t deadline)
+{
+	struct drm_sched_fence *fence = to_drm_sched_fence(f);
+
+	if (fence->parent)
+		dma_fence_set_deadline(fence->parent, deadline);
+}
+
 static const struct dma_fence_ops drm_sched_fence_ops_scheduled = {
 	.get_driver_name = drm_sched_fence_get_driver_name,
 	.get_timeline_name = drm_sched_fence_get_timeline_name,
@@ -138,6 +147,7 @@  static const struct dma_fence_ops drm_sched_fence_ops_finished = {
 	.get_driver_name = drm_sched_fence_get_driver_name,
 	.get_timeline_name = drm_sched_fence_get_timeline_name,
 	.release = drm_sched_fence_release_finished,
+	.set_deadline = drm_sched_fence_set_deadline_finished,
 };
 
 struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f)
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index a2a953693b45..fcc601962e92 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -818,6 +818,9 @@  static int drm_sched_main(void *param)
 
 		if (!IS_ERR_OR_NULL(fence)) {
 			s_fence->parent = dma_fence_get(fence);
+			if (test_bit(DMA_FENCE_FLAG_HAS_DEADLINE_BIT,
+				     &s_fence->finished.flags))
+				dma_fence_set_deadline(fence, s_fence->finished.deadline);
 			r = dma_fence_add_callback(fence, &sched_job->cb,
 						   drm_sched_job_done_cb);
 			if (r == -ENOENT)