lib: Cancel all outstanding requests at the end of a test

Quite often on catastrophic failure the test leaves a long queue of
unterminated batches pending execution. Each runs until hangcheck fires
and skips onto the next, leaving us waiting for a very long time at test
exit.

On older kernels, this gracefully degrades into the existing mechanism.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Antonio Argenziano <antonio.argenziano@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/igt_debugfs.h b/lib/igt_debugfs.h
index ff8612dc..9f81be0a 100644
--- a/lib/igt_debugfs.h
+++ b/lib/igt_debugfs.h
@@ -191,6 +191,18 @@ void igt_require_hpd_storm_ctl(int fd);
  */
 #define DROP_IDLE 0x40
 /**
+ * DROP_RESET_ACTIVE:
+ *
+ * Cancel all outstanding requests by forcing a gpu reset
+ */
+#define DROP_RESET_ACTIVE 0x80
+/**
+ * DROP_RESET_SEQNO:
+ *
+ * Reset the global request seqno counter back to 0
+ */
+#define DROP_RESET_SEQNO 0x100
+/**
  * DROP_ALL:
  *
  * All of the above DROP_ flags combined.