gem_alive: A utility to see if the driver or GPU has hung

lib/igt_debugfs.h

@@ -27,6 +27,7 @@
 
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdio.h>
 
 enum pipe;
 

tests/.gitignore

@@ -9,6 +9,7 @@ drm_vma_limiter_cached
 drm_vma_limiter_cpu
 drm_vma_limiter_gtt
 drv_suspend
+gem_alive
 gem_bad_address
 gem_bad_batch
 gem_bad_blit

tests/Makefile.sources

@@ -1,4 +1,5 @@
 noinst_PROGRAMS = \
+	gem_alive \
 	gem_stress \
 	ddi_compute_wrpll \
 	$(TESTS_progs) \

tests/gem_alive.c

@@ -0,0 +1,35 @@
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+#include <i915_drm.h>
+
+#include "drmtest.h"
+
+int main(void)
+{
+	struct drm_i915_gem_sw_finish arg = { 0 };
+	int fd;
+
+	signal(SIGALRM, SIG_IGN);
+
+	fd = drm_open_any();
+	if (fd < 0)
+		return 77;
+
+	alarm(1);
+	if (ioctl(fd, DRM_IOCTL_I915_GEM_SW_FINISH, &arg) == 0)
+		return 77;
+
+	switch (errno) {
+	case ENOENT:
+		return 0;
+	case EIO:
+		return 1;
+	case EINTR:
+		return 2;
+	default:
+		return 3;
+	}
+}