[igt-dev] [PATCH i-g-t] tests/perf_pmu: Fix usage of for_each_engine_class_instance

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Wrong file descriptor was passed to the iterator. This had currently no
effect, since it wasn't used in the macro, but needs to be fixed.

At the same time make the macro consistent by checking for engine presence
like the other iterators do.

Added __for_each_engine_class_instance which does not check for engine
presence and so is useful for enumerating all possible engines - like for
instance for subtest enumeration.

And another 'wrong fd used' fixlet in the render node subtests.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Reported-by: Michel Thierry <michel.thierry at intel.com>
Cc: Michel Thierry <michel.thierry at intel.com>
---
 lib/igt_gt.h     | 12 +++++++-----
 tests/perf_pmu.c | 30 ++++++++++--------------------
 2 files changed, 17 insertions(+), 25 deletions(-)

diff --git a/lib/igt_gt.h b/lib/igt_gt.h
index a517ed7b29a0..d44b7552f3c4 100644
--- a/lib/igt_gt.h
+++ b/lib/igt_gt.h
@@ -100,11 +100,6 @@ extern const struct intel_execution_engine2 {
 	int instance;
 } intel_execution_engines2[];
 
-#define for_each_engine_class_instance(fd__, e__) \
-	for ((e__) = intel_execution_engines2;\
-	     (e__)->name; \
-	     (e__)++)
-
 unsigned int
 gem_class_instance_to_eb_flags(int gem_fd,
 			       enum drm_i915_gem_engine_class class,
@@ -122,4 +117,11 @@ void gem_require_engine(int gem_fd,
 	igt_require(gem_has_engine(gem_fd, class, instance));
 }
 
+#define __for_each_engine_class_instance(fd__, e__) \
+	for ((e__) = intel_execution_engines2; (e__)->name; (e__)++)
+
+#define for_each_engine_class_instance(fd__, e__) \
+	for ((e__) = intel_execution_engines2; (e__)->name; (e__)++) \
+		for_if (gem_has_engine((fd__), (e__)->class, (e__)->instance))
+
 #endif /* IGT_GT_H */
diff --git a/tests/perf_pmu.c b/tests/perf_pmu.c
index b59af81819c7..2273ddb9e684 100644
--- a/tests/perf_pmu.c
+++ b/tests/perf_pmu.c
@@ -434,10 +434,8 @@ busy_check_all(int gem_fd, const struct intel_execution_engine2 *e,
 
 	i = 0;
 	fd[0] = -1;
-	for_each_engine_class_instance(fd, e_) {
-		if (!gem_has_engine(gem_fd, e_->class, e_->instance))
-			continue;
-		else if (e == e_)
+	for_each_engine_class_instance(gem_fd, e_) {
+		if (e == e_)
 			busy_idx = i;
 
 		fd[i++] = open_group(I915_PMU_ENGINE_BUSY(e_->class,
@@ -499,10 +497,7 @@ most_busy_check_all(int gem_fd, const struct intel_execution_engine2 *e,
 	unsigned int idle_idx, i;
 
 	i = 0;
-	for_each_engine_class_instance(fd, e_) {
-		if (!gem_has_engine(gem_fd, e_->class, e_->instance))
-			continue;
-
+	for_each_engine_class_instance(gem_fd, e_) {
 		if (e == e_)
 			idle_idx = i;
 		else if (spin)
@@ -559,10 +554,7 @@ all_busy_check_all(int gem_fd, const unsigned int num_engines,
 	unsigned int i;
 
 	i = 0;
-	for_each_engine_class_instance(fd, e) {
-		if (!gem_has_engine(gem_fd, e->class, e->instance))
-			continue;
-
+	for_each_engine_class_instance(gem_fd, e) {
 		if (spin)
 			__submit_spin_batch(gem_fd, spin, e, 64);
 		else
@@ -1677,10 +1669,8 @@ igt_main
 		igt_require_gem(fd);
 		igt_require(i915_type_id() > 0);
 
-		for_each_engine_class_instance(fd, e) {
-			if (gem_has_engine(fd, e->class, e->instance))
-				num_engines++;
-		}
+		for_each_engine_class_instance(fd, e)
+			num_engines++;
 	}
 
 	/**
@@ -1689,7 +1679,7 @@ igt_main
 	igt_subtest("invalid-init")
 		invalid_init();
 
-	for_each_engine_class_instance(fd, e) {
+	__for_each_engine_class_instance(fd, e) {
 		const unsigned int pct[] = { 2, 50, 98 };
 
 		/**
@@ -1888,7 +1878,7 @@ igt_main
 			gem_quiescent_gpu(fd);
 		}
 
-		for_each_engine_class_instance(fd, e) {
+		__for_each_engine_class_instance(render_fd, e) {
 			igt_subtest_group {
 				igt_fixture {
 					gem_require_engine(render_fd,
@@ -1897,10 +1887,10 @@ igt_main
 				}
 
 				igt_subtest_f("render-node-busy-%s", e->name)
-					single(fd, e, TEST_BUSY);
+					single(render_fd, e, TEST_BUSY);
 				igt_subtest_f("render-node-busy-idle-%s",
 					      e->name)
-					single(fd, e,
+					single(render_fd, e,
 					       TEST_BUSY | TEST_TRAILING_IDLE);
 			}
 		}
-- 
2.14.1