drm/i915: Add a simple request selftest for waiting (f1ae924d) · Commits · 戴 / test

drivers/gpu/drm/i915/selftests/i915_gem_request.c

+71 −0

Original line number	Diff line number	Diff line
		@@ -49,10 +49,81 @@ out_unlock:
		return err;
		}

		static int igt_wait_request(void *arg)
		{
		const long T = HZ / 4;
		struct drm_i915_private *i915 = arg;
		struct drm_i915_gem_request *request;
		int err = -EINVAL;

		/* Submit a request, then wait upon it */

		mutex_lock(&i915->drm.struct_mutex);
		request = mock_request(i915->engine[RCS], i915->kernel_context, T);
		if (!request) {
		err = -ENOMEM;
		goto out_unlock;
		}

		if (i915_wait_request(request, I915_WAIT_LOCKED, 0) != -ETIME) {
		pr_err("request wait (busy query) succeeded (expected timeout before submit!)\n");
		goto out_unlock;
		}

		if (i915_wait_request(request, I915_WAIT_LOCKED, T) != -ETIME) {
		pr_err("request wait succeeded (expected timeout before submit!)\n");
		goto out_unlock;
		}

		if (i915_gem_request_completed(request)) {
		pr_err("request completed before submit!!\n");
		goto out_unlock;
		}

		i915_add_request(request);

		if (i915_wait_request(request, I915_WAIT_LOCKED, 0) != -ETIME) {
		pr_err("request wait (busy query) succeeded (expected timeout after submit!)\n");
		goto out_unlock;
		}

		if (i915_gem_request_completed(request)) {
		pr_err("request completed immediately!\n");
		goto out_unlock;
		}

		if (i915_wait_request(request, I915_WAIT_LOCKED, T / 2) != -ETIME) {
		pr_err("request wait succeeded (expected timeout!)\n");
		goto out_unlock;
		}

		if (i915_wait_request(request, I915_WAIT_LOCKED, T) == -ETIME) {
		pr_err("request wait timed out!\n");
		goto out_unlock;
		}

		if (!i915_gem_request_completed(request)) {
		pr_err("request not complete after waiting!\n");
		goto out_unlock;
		}

		if (i915_wait_request(request, I915_WAIT_LOCKED, T) == -ETIME) {
		pr_err("request wait timed out when already complete!\n");
		goto out_unlock;
		}

		err = 0;
		out_unlock:
		mock_device_flush(i915);
		mutex_unlock(&i915->drm.struct_mutex);
		return err;
		}

		int i915_gem_request_mock_selftests(void)
		{
		static const struct i915_subtest tests[] = {
		SUBTEST(igt_add_request),
		SUBTEST(igt_wait_request),
		};
		struct drm_i915_private *i915;
		int err;

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