tests/perf_pmu: Explicitly test for engine availability in init tests

Test will succeed if present engine can be opened, or if the missing
engine reports the correct error code.

v2:
 * Use the right errno.
 * Close fd only on success. (Chris Wilson)

v3:
 * Only sample errno on failure. (Chris Wilson)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 13 insertions, 3 deletions

diff --git a/tests/perf_pmu.c b/tests/perf_pmu.c
index 3d1b3a2c..5b38712f 100644
--- a/tests/perf_pmu.c
+++ b/tests/perf_pmu.c
@@ -72,11 +72,21 @@ static int open_group(uint64_t config, int group)
 static void
 init(int gem_fd, const struct intel_execution_engine2 *e, uint8_t sample)
 {
-	int fd;
+	int fd, err = 0;
 
-	fd = open_pmu(__I915_PMU_ENGINE(e->class, e->instance, sample));
+	errno = 0;
+	fd = perf_i915_open(__I915_PMU_ENGINE(e->class, e->instance, sample));
+	if (fd < 0)
+		err = errno;
 
-	close(fd);
+	if (gem_has_engine(gem_fd, e->class, e->instance)) {
+		igt_assert_eq(err, 0);
+		igt_assert_fd(fd);
+		close(fd);
+	} else {
+		igt_assert_lt(fd, 0);
+		igt_assert_eq(err, ENODEV);
+	}
 }
 
 static uint64_t pmu_read_single(int fd)