tests/i915/gem_exec_balancer: Skip the test if no perf engines are available

Require that the test can access perf engines files. This patch also fixes
the error check for perf_i915_open().

v2:
	- Skip based on valid perf type ID. (Chris)

Signed-off-by: Antonio Argenziano <antonio.argenziano@intel.com>

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

1 files changed, 7 insertions, 1 deletions

diff --git a/tests/i915/gem_exec_balancer.c b/tests/i915/gem_exec_balancer.c
index 150eba0d..f51be339 100644
--- a/tests/i915/gem_exec_balancer.c
+++ b/tests/i915/gem_exec_balancer.c
@@ -61,7 +61,7 @@ static bool has_class_instance(int i915, uint16_t class, uint16_t instance)
 	int fd;
 
 	fd = perf_i915_open(i915, I915_PMU_ENGINE_BUSY(class, instance));
-	if (fd != -1) {
+	if (fd >= 0) {
 		close(fd);
 		return true;
 	}
@@ -113,6 +113,11 @@ list_engines(int i915, uint32_t class_mask, unsigned int *out)
 	return engines;
 }
 
+static bool has_perf_engines(int i915)
+{
+	return i915_perf_type_id(i915);
+}
+
 static int __set_engines(int i915, uint32_t ctx,
 			 const struct i915_engine_class_instance *ci,
 			 unsigned int count)
@@ -1818,6 +1823,7 @@ igt_main
 		gem_require_contexts(i915);
 		igt_require(has_context_engines(i915));
 		igt_require(has_load_balancer(i915));
+		igt_require(has_perf_engines(i915));
 
 		igt_fork_hang_detector(i915);
 	}