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Commit 5fd4d112 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Add a simple fence selftest to i915_gem_request 



Do a quick selftest on in the interoperability of dma_fence_wait on a
i915_gem_request.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-12-chris@chris-wilson.co.uk
parent f1ae924d

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

+61 −0
Original line number Diff line number Diff line
@@ -119,11 +119,72 @@ static int igt_wait_request(void *arg) 
	return err;

}



static int igt_fence_wait(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, treat it as a fence and 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_locked;

	}

	mutex_unlock(&i915->drm.struct_mutex); /* safe as we are single user */



	if (dma_fence_wait_timeout(&request->fence, false, T) != -ETIME) {

		pr_err("fence wait success before submit (expected timeout)!\n");

		goto out_device;

	}



	mutex_lock(&i915->drm.struct_mutex);

	i915_add_request(request);

	mutex_unlock(&i915->drm.struct_mutex);



	if (dma_fence_is_signaled(&request->fence)) {

		pr_err("fence signaled immediately!\n");

		goto out_device;

	}



	if (dma_fence_wait_timeout(&request->fence, false, T / 2) != -ETIME) {

		pr_err("fence wait success after submit (expected timeout)!\n");

		goto out_device;

	}



	if (dma_fence_wait_timeout(&request->fence, false, T) <= 0) {

		pr_err("fence wait timed out (expected success)!\n");

		goto out_device;

	}



	if (!dma_fence_is_signaled(&request->fence)) {

		pr_err("fence unsignaled after waiting!\n");

		goto out_device;

	}



	if (dma_fence_wait_timeout(&request->fence, false, T) <= 0) {

		pr_err("fence wait timed out when complete (expected success)!\n");

		goto out_device;

	}



	err = 0;

out_device:

	mutex_lock(&i915->drm.struct_mutex);

out_locked:

	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),

		SUBTEST(igt_fence_wait),

	};

	struct drm_i915_private *i915;

	int err;