lib: Force global reset + uevents for hang detector

The hang detector relies on a uevent for notification and aborting the
test. As proposed, fine-grained resets may not produce a global uevent
and so this hang detection becomes void. As we don't expect any hang, we
can just reduce the reset to only a global + uevent and so maintain
functionality, and switch back to fine-grained resets afterwards.

Note that any test that requires testing fine-grained resets should
ensure that they are enabled first as igt may leave the global
parameters in an inconsistent state.

v2: Restore fine-grained resets for explict igt_allow_hang()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/igt_sysfs.h b/lib/igt_sysfs.h
index 4089535d..d666438a 100644
--- a/lib/igt_sysfs.h
+++ b/lib/igt_sysfs.h
@@ -29,6 +29,10 @@
 
 int igt_sysfs_open(int device, int *idx);
 int igt_sysfs_open_parameters(int device);
+bool igt_sysfs_set_parameter(int device,
+			     const char *parameter,
+			     const char *fmt, ...)
+	__attribute__((format(printf,3,4)));
 
 int igt_sysfs_read(int dir, const char *attr, void *data, int len);
 int igt_sysfs_write(int dir, const char *attr, const void *data, int len);
@@ -38,6 +42,8 @@ char *igt_sysfs_get(int dir, const char *attr);
 
 int igt_sysfs_scanf(int dir, const char *attr, const char *fmt, ...)
 	__attribute__((format(scanf,3,4)));
+int igt_sysfs_vprintf(int dir, const char *attr, const char *fmt, va_list ap)
+	__attribute__((format(printf,3,0)));
 int igt_sysfs_printf(int dir, const char *attr, const char *fmt, ...)
 	__attribute__((format(printf,3,4)));