[PATCH i-g-t v1 1/1] tests/xe_eudebug: refactor exec-queue-placements test

[Jan Sokolowski <jan.sokolowski@intel.com>]

In some cases, ccs_mode_all_engines can fail,
which will cause test fixture to not execute properly
and put the rest of the tests in an unstable state. Also,
ccs_mode_all_engines changes the state of the card for
other tests as well, thus it should clean after itself too,
which until now it didn't do.

Move the test to the end in the execution list and add
a proper cleanup method, ccs_mode_restore;

Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
---
 tests/intel/xe_eudebug.c | 46 ++++++++++++++++++++++++++++++----------
 1 file changed, 35 insertions(+), 11 deletions(-)

diff --git a/tests/intel/xe_eudebug.c b/tests/intel/xe_eudebug.c
index 91e9ae885..c93b55857 100644
--- a/tests/intel/xe_eudebug.c
+++ b/tests/intel/xe_eudebug.c
@@ -2805,6 +2805,25 @@ static void ccs_mode_all_engines(int num_gt)
 	igt_require(num_gts_with_ccs_mode > 0);
 }
 
+static void ccs_mode_restore(int num_gt)
+{
+	int fd, gt, gt_fd, ccs_mode, num_slices;
+
+	for (gt = 0; gt < num_gt; gt++) {
+		fd = drm_open_driver(DRIVER_XE);
+		gt_fd = xe_sysfs_gt_open(fd, gt);
+		close(fd);
+
+		if (igt_sysfs_scanf(gt_fd, "num_cslices", "%u", &num_slices) <= 0)
+			continue;
+
+		igt_assert(igt_sysfs_printf(gt_fd, "ccs_mode", "%u", 1) > 0);
+		igt_assert(igt_sysfs_scanf(gt_fd, "ccs_mode", "%u", &ccs_mode) > 0);
+		igt_assert(ccs_mode == 1);
+		close(gt_fd);
+	}
+}
+
 igt_main
 {
 	bool was_enabled;
@@ -2919,17 +2938,6 @@ igt_main
 	igt_subtest("discovery-empty-clients")
 		test_empty_discovery(fd, DISCOVERY_DESTROY_RESOURCES, 16);
 
-	igt_subtest_group {
-		igt_fixture {
-			drm_close_driver(fd);
-			ccs_mode_all_engines(gt_count);
-			fd = drm_open_driver(DRIVER_XE);
-		}
-
-		igt_subtest("exec-queue-placements")
-			test_basic_sessions(fd, EXEC_QUEUES_PLACEMENTS, 1, true);
-	}
-
 	igt_fixture {
 		xe_eudebug_enable(fd, was_enabled);
 		drm_close_driver(fd);
@@ -2984,4 +2992,20 @@ igt_main
 			free(multigpu_was_enabled);
 		}
 	}
+
+	igt_subtest_group {
+		igt_fixture {
+			ccs_mode_all_engines(gt_count);
+		}
+
+		igt_subtest("exec-queue-placements") {
+			fd = drm_open_driver(DRIVER_XE);
+
+			test_basic_sessions(fd, EXEC_QUEUES_PLACEMENTS, 1, true);
+
+			ccs_mode_restore(gt_count);
+			drm_close_driver(fd);
+		}
+	}
+
 }
-- 
2.34.1