lib/intel_batchbuffer: add tracking and reset for allocator

After subtest ends, due to normal flow or after fail by
igt_assert, igt_core inits intel_allocator before next subtest,
and this makes allocator handle keeped in intel_batchbuffer
invalid. Moreover any call to intel_allocator can result in
fail as there are no allocators until first allocator_open.

Add tracking intel_butchbuffer if it is using allocator and
recreate its allocator handle and offsets from igt_core before
next subtest.

Add flag for turn on tracking and a helper function for it with
default value off. It will not change behaviour of already used
tests. Use case is for standalone runs with many subtests like
gem_concurrent_blit.

v2: add tracking flag with default off (Zbigniew)
v3: add and correct functions descriptions (Zbigniew)

Signed-off-by: Kamil Konieczny <kamil.konieczny@linux.intel.com>
Cc: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
Reviewed-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/igt_core.c b/lib/igt_core.c
index 7c906675..ab27a24d 100644
--- a/lib/igt_core.c
+++ b/lib/igt_core.c
@@ -59,6 +59,7 @@
 
 #include "drmtest.h"
 #include "intel_allocator.h"
+#include "intel_batchbuffer.h"
 #include "intel_chipset.h"
 #include "intel_io.h"
 #include "igt_debugfs.h"
@@ -1426,6 +1427,7 @@ __noreturn static void exit_subtest(const char *result)
 	 * remnants from previous allocator run (if any).
 	 */
 	intel_allocator_init();
+	intel_bb_reinit_allocator();
 
 	if (!in_dynamic_subtest)
 		_igt_dynamic_tests_executed = -1;