If the idle_pulse fails to flush the i915_active, dump the tree to see
if that has any clues.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
.../drm/i915/gt/selftest_engine_heartbeat.c | 4 ++
drivers/gpu/drm/i915/i915_active.h | 2 +
drivers/gpu/drm/i915/selftests/i915_active.c | 40 +++++++++++++++++++
3 files changed, 46 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
index 155c508024df..131c49ddf33f 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
@@ -100,8 +100,12 @@ static int __live_idle_pulse(struct intel_engine_cs *engine,
pulse_unlock_wait(p); /* synchronize with the retirement callback */
if (!i915_active_is_idle(&p->active)) {
+ struct drm_printer m = drm_err_printer("pulse");
+
pr_err("%s: heartbeat pulse did not flush idle tasks\n",
engine->name);
+ i915_active_print(&p->active, &m);
+
err = -EINVAL;
goto out;
}
diff --git a/drivers/gpu/drm/i915/i915_active.h b/drivers/gpu/drm/i915/i915_active.h
index 4f52fe6146d2..44859356ce97 100644
--- a/drivers/gpu/drm/i915/i915_active.h
+++ b/drivers/gpu/drm/i915/i915_active.h
@@ -214,4 +214,6 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref,
void i915_active_acquire_barrier(struct i915_active *ref);
void i915_request_add_active_barriers(struct i915_request *rq);
+void i915_active_print(struct i915_active *ref, struct drm_printer *m);
+
#endif /* _I915_ACTIVE_H_ */
diff --git a/drivers/gpu/drm/i915/selftests/i915_active.c b/drivers/gpu/drm/i915/selftests/i915_active.c
index 96513a7d4739..ba403a64b952 100644
--- a/drivers/gpu/drm/i915/selftests/i915_active.c
+++ b/drivers/gpu/drm/i915/selftests/i915_active.c
@@ -205,3 +205,43 @@ int i915_active_live_selftests(struct drm_i915_private *i915)
return i915_subtests(tests, i915);
}
+
+static struct intel_engine_cs *node_to_barrier(struct active_node *it)
+{
+ struct intel_engine_cs *engine;
+
+ if (!is_barrier(&it->base))
+ return NULL;
+
+ engine = __barrier_to_engine(it);
+ smp_rmb(); /* serialise with add_active_barriers */
+ if (!is_barrier(&it->base))
+ return NULL;
+
+ return engine;
+}
+
+void i915_active_print(struct i915_active *ref, struct drm_printer *m)
+{
+ drm_printf(m, "active %pS:%pS\n", ref->active, ref->retire);
+ drm_printf(m, "\tcount: %d\n", atomic_read(&ref->count));
+ drm_printf(m, "\tpreallocated barriers? %s\n",
+ yesno(!llist_empty(&ref->preallocated_barriers)));
+
+ if (i915_active_acquire_if_busy(ref)) {
+ struct active_node *it, *n;
+
+ rbtree_postorder_for_each_entry_safe(it, n, &ref->tree, node) {
+ struct intel_engine_cs *engine;
+
+ engine = node_to_barrier(it);
+ if (engine)
+ drm_printf(m, "\tbarrier: %s\n", engine->name);
+ else
+ drm_printf(m, "\ttimeline: %llx\n",
+ it->timeline);
+ }
+
+ i915_active_release(ref);
+ }
+}
--
2.24.0.rc1
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