Am 05.09.22 um 12:56 schrieb Arvind Yadav:
Here's on debug adding an enable_signaling callback for finished
fences and enabling software signaling for finished fence.
Signed-off-by: Arvind Yadav <Arvind.Yadav@xxxxxxx>
---
drivers/gpu/drm/scheduler/sched_fence.c | 12 ++++++++++++
drivers/gpu/drm/scheduler/sched_main.c | 4 +++-
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/scheduler/sched_fence.c b/drivers/gpu/drm/scheduler/sched_fence.c
index 7fd869520ef2..ebd26cdb79a0 100644
--- a/drivers/gpu/drm/scheduler/sched_fence.c
+++ b/drivers/gpu/drm/scheduler/sched_fence.c
@@ -122,16 +122,28 @@ static void drm_sched_fence_release_finished(struct dma_fence *f)
dma_fence_put(&fence->scheduled);
}
+#ifdef CONFIG_DEBUG_FS
+static bool drm_sched_enable_signaling(struct dma_fence *f)
+{
+ return true;
+}
+#endif
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,
+#ifdef CONFIG_DEBUG_FS
+ .enable_signaling = drm_sched_enable_signaling,
+#endif
.release = drm_sched_fence_release_scheduled,
};
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,
+#ifdef CONFIG_DEBUG_FS
+ .enable_signaling = drm_sched_enable_signaling,
+#endif
Adding the callback should not be necessary.
.release = drm_sched_fence_release_finished,
};
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index e0ab14e0fb6b..140e3d8646e2 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -961,7 +961,9 @@ static int drm_sched_main(void *param)
s_fence->parent = dma_fence_get(fence);
/* Drop for original kref_init of the fence */
dma_fence_put(fence);
Uff, not related to your patch but that looks wrong to me. The reference
can only be dropped after the call to dma_fence_add_callback().
-
+#ifdef CONFIG_DEBUG_FS
+ dma_fence_enable_sw_signaling(&s_fence->finished);
+#endif
This should always be called, independent of the config options set.
Christian.
r = dma_fence_add_callback(fence, &sched_job->cb,
drm_sched_job_done_cb);
if (r == -ENOENT)
