lib/igt_gt: Document and consolidate

Also move forcewake and stop_rings code from igt_debugfs to igt_gt
since it fits better. And move the hang injection fork helpers from
igt_aux to igt_gt, too.

Also push the intel_gen call into igt_hang_ring while at it.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

1 files changed, 0 insertions, 68 deletions

diff --git a/lib/igt_aux.c b/lib/igt_aux.c
index aefa0863..b31f0cdb 100644
--- a/lib/igt_aux.c
+++ b/lib/igt_aux.c
@@ -132,74 +132,6 @@ void igt_stop_signal_helper(void)
 	sig_stat = 0;
 }
 
-/* GPU abusers */
-static struct igt_helper_process hang_helper;
-static void __attribute__((noreturn))
-hang_helper_process(pid_t pid, int fd, int gen)
-{
-	while (1) {
-		if (kill(pid, 0)) /* Parent has died, so must we. */
-			exit(0);
-
-		igt_post_hang_ring(fd,
-				   igt_hang_ring(fd, gen, I915_EXEC_DEFAULT));
-
-		sleep(1);
-	}
-}
-
-/**
- * igt_fork_hang_helper:
- *
- * Fork a child process using #igt_fork_helper to hang the default engine
- * of the GPU at regular intervals.
- *
- * This is useful to exercise slow running code (such as aperture placement)
- * which needs to be robust against a GPU reset.
- *
- * In tests with subtests this function can be called outside of failure
- * catching code blocks like #igt_fixture or #igt_subtest.
- */
-int igt_fork_hang_helper(void)
-{
-	int fd, gen;
-
-	if (igt_only_list_subtests())
-		return 1;
-
-	fd = drm_open_any();
-	if (fd == -1)
-		return 0;
-
-	gen = intel_gen(intel_get_drm_devid(fd));
-	if (gen < 5) {
-		close(fd);
-		return 0;
-	}
-
-	igt_fork_helper(&hang_helper)
-		hang_helper_process(getppid(), fd, gen);
-
-	close(fd);
-	return 1;
-}
-
-/**
- * igt_stop_hang_helper:
- *
- * Stops the child process spawned with igt_fork_hang_helper().
- *
- * In tests with subtests this function can be called outside of failure
- * catching code blocks like #igt_fixture or #igt_subtest.
- */
-void igt_stop_hang_helper(void)
-{
-	if (igt_only_list_subtests())
-		return;
-
-	igt_stop_helper(&hang_helper);
-}
-
 /**
  * igt_check_boolean_env_var:
  * @env_var: environment variable name