1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_active.c b/drivers/gpu/drm/i915/selftests/i915_active.c
new file mode 100644
index 000000000000..337b1f98b923
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_active.c
@@ -0,0 +1,157 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2018 Intel Corporation
+ */
+
+#include "../i915_selftest.h"
+
+#include "igt_flush_test.h"
+#include "lib_sw_fence.h"
+
+struct live_active {
+	struct i915_active base;
+	bool retired;
+};
+
+static void __live_active_retire(struct i915_active *base)
+{
+	struct live_active *active = container_of(base, typeof(*active), base);
+
+	active->retired = true;
+}
+
+static int __live_active_setup(struct drm_i915_private *i915,
+			       struct live_active *active)
+{
+	struct intel_engine_cs *engine;
+	struct i915_sw_fence *submit;
+	enum intel_engine_id id;
+	unsigned int count = 0;
+	int err = 0;
+
+	submit = heap_fence_create(GFP_KERNEL);
+	if (!submit)
+		return -ENOMEM;
+
+	i915_active_init(i915, &active->base, __live_active_retire);
+	active->retired = false;
+
+	if (!i915_active_acquire(&active->base)) {
+		pr_err("First i915_active_acquire should report being idle\n");
+		err = -EINVAL;
+		goto out;
+	}
+
+	for_each_engine(engine, i915, id) {
+		struct i915_request *rq;
+
+		rq = i915_request_alloc(engine, i915->kernel_context);
+		if (IS_ERR(rq)) {
+			err = PTR_ERR(rq);
+			break;
+		}
+
+		err = i915_sw_fence_await_sw_fence_gfp(&rq->submit,
+						       submit,
+						       GFP_KERNEL);
+		if (err >= 0)
+			err = i915_active_ref(&active->base,
+					      rq->fence.context, rq);
+		i915_request_add(rq);
+		if (err) {
+			pr_err("Failed to track active ref!\n");
+			break;
+		}
+
+		count++;
+	}
+
+	i915_active_release(&active->base);
+	if (active->retired && count) {
+		pr_err("i915_active retired before submission!\n");
+		err = -EINVAL;
+	}
+	if (active->base.count != count) {
+		pr_err("i915_active not tracking all requests, found %d, expected %d\n",
+		       active->base.count, count);
+		err = -EINVAL;
+	}
+
+out:
+	i915_sw_fence_commit(submit);
+	heap_fence_put(submit);
+
+	return err;
+}
+
+static int live_active_wait(void *arg)
+{
+	struct drm_i915_private *i915 = arg;
+	struct live_active active;
+	intel_wakeref_t wakeref;
+	int err;
+
+	/* Check that we get a callback when requests retire upon waiting */
+
+	mutex_lock(&i915->drm.struct_mutex);
+	wakeref = intel_runtime_pm_get(i915);
+
+	err = __live_active_setup(i915, &active);
+
+	i915_active_wait(&active.base);
+	if (!active.retired) {
+		pr_err("i915_active not retired after waiting!\n");
+		err = -EINVAL;
+	}
+
+	i915_active_fini(&active.base);
+	if (igt_flush_test(i915, I915_WAIT_LOCKED))
+		err = -EIO;
+
+	intel_runtime_pm_put(i915, wakeref);
+	mutex_unlock(&i915->drm.struct_mutex);
+	return err;
+}
+
+static int live_active_retire(void *arg)
+{
+	struct drm_i915_private *i915 = arg;
+	struct live_active active;
+	intel_wakeref_t wakeref;
+	int err;
+
+	/* Check that we get a callback when requests are indirectly retired */
+
+	mutex_lock(&i915->drm.struct_mutex);
+	wakeref = intel_runtime_pm_get(i915);
+
+	err = __live_active_setup(i915, &active);
+
+	/* waits for & retires all requests */
+	if (igt_flush_test(i915, I915_WAIT_LOCKED))
+		err = -EIO;
+
+	if (!active.retired) {
+		pr_err("i915_active not retired after flushing!\n");
+		err = -EINVAL;
+	}
+
+	i915_active_fini(&active.base);
+	intel_runtime_pm_put(i915, wakeref);
+	mutex_unlock(&i915->drm.struct_mutex);
+	return err;
+}
+
+int i915_active_live_selftests(struct drm_i915_private *i915)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(live_active_wait),
+		SUBTEST(live_active_retire),
+	};
+
+	if (i915_terminally_wedged(&i915->gpu_error))
+		return 0;
+
+	return i915_subtests(tests, i915);
+}