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drm/i915: Add a simple fence selftest to i915_gem_request

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

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-12-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2017-02-13 17:15:23 +00:00
parent f1ae924d18
commit 5fd4d112d2
1 changed files with 61 additions and 0 deletions
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61
drivers/gpu/drm/i915/selftests/i915_gem_request.c
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@@ -119,11 +119,72 @@ out_unlock:
return err; 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) int i915_gem_request_mock_selftests(void)
{ {
static const struct i915_subtest tests[] = { static const struct i915_subtest tests[] = {
SUBTEST(igt_add_request), SUBTEST(igt_add_request),
SUBTEST(igt_wait_request), SUBTEST(igt_wait_request),
SUBTEST(igt_fence_wait),
}; };
struct drm_i915_private *i915; struct drm_i915_private *i915;
int err; int err;