[PATCH i-g-t v2] tests/intel/xe_pxp: Terminate PXP on exit

[Daniele Ceraolo Spurio]

Most of out tests expect to start their execution from a clean GPU state.
However, the PXP tests currently leave a PXP session running when they
complete, so follow up tests will not have a clean starting state; given
that PXP can impact the timing of some operations (e.g. suspend/resume),
this could pollute the results of those tests. Therefore, let's make
sure that PXP is de-activated before we exit.

While at it, update the fd cleanup to use drm_close_driver() instead
of close().

v2: only do the termination if PXP is supported.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
Reviewed-by: Kamil Konieczny <kamil.konieczny at linux.intel.com> #v1
---
 tests/intel/xe_pxp.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/tests/intel/xe_pxp.c b/tests/intel/xe_pxp.c
index 458d32322..9eddc03fc 100644
--- a/tests/intel/xe_pxp.c
+++ b/tests/intel/xe_pxp.c
@@ -1140,9 +1140,23 @@ static void termination_tests(int fd, bool pxp_supported, drmModeResPtr res,
 		}
 }
 
+int xe_fd = -1;
+
+static void exit_handler(int sig)
+{
+	/*
+	 * PXP can interact with some operations (e.g. suspend/resume), which
+	 * could impact the behavior of other tests if they unknowingly start
+	 * when PXP is already active. Therefore, let's make sure PXP is
+	 * de-activated before we exit.
+	 */
+	trigger_termination(xe_fd, PXP_TERMINATION_IRQ);
+	drm_close_driver(xe_fd);
+	usleep(50 * 1000); /* give time for the termination to be processed */
+}
+
 igt_main
 {
-	int xe_fd = -1;
 	bool pxp_supported = true;
 	drmModeResPtr res;
 
@@ -1151,6 +1165,8 @@ igt_main
 		igt_require(xe_has_engine_class(xe_fd, DRM_XE_ENGINE_CLASS_RENDER));
 		pxp_supported = is_pxp_hw_supported(xe_fd);
 		res = drmModeGetResources(xe_fd);
+		if (pxp_supported)
+			igt_install_exit_handler(exit_handler);
 	}
 
 	igt_subtest_group {
@@ -1215,6 +1231,7 @@ igt_main
 
 	igt_fixture {
 		drmModeFreeResources(res);
-		close(xe_fd);
+		if (!pxp_supported)
+			drm_close_driver(xe_fd);
 	}
 }
-- 
2.43.0