- Added a testcase to verify the multiroot force merge fini.
- Added a new field in_use to track the mm freed status.
v2:(Matthew)
- Add kunit_fail_current_test() when WARN_ON is true.
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx>
Signed-off-by: Lin.Cao <lincao12@xxxxxxx>
---
drivers/gpu/drm/drm_buddy.c | 6 +++++-
drivers/gpu/drm/tests/drm_buddy_test.c | 29 ++++++++++++++++++--------
2 files changed, 25 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index ca42e6081d27..241c855f891f 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -3,6 +3,8 @@
* Copyright © 2021 Intel Corporation
*/
+#include <kunit/test-bug.h>
+
#include <linux/kmemleak.h>
#include <linux/module.h>
#include <linux/sizes.h>
@@ -335,7 +337,9 @@ void drm_buddy_fini(struct drm_buddy *mm)
start = drm_buddy_block_offset(mm->roots[i]);
__force_merge(mm, start, start + size, order);
- WARN_ON(!drm_buddy_block_is_free(mm->roots[i]));
+ if (WARN_ON(!drm_buddy_block_is_free(mm->roots[i])))
+ kunit_fail_current_test("buddy_fini() root");
+
drm_block_free(mm, mm->roots[i]);
root_size = mm->chunk_size << order;
diff --git a/drivers/gpu/drm/tests/drm_buddy_test.c b/drivers/gpu/drm/tests/drm_buddy_test.c
index 9662c949d0e3..4b5818f9f2a9 100644
--- a/drivers/gpu/drm/tests/drm_buddy_test.c
+++ b/drivers/gpu/drm/tests/drm_buddy_test.c
@@ -385,17 +385,28 @@ static void drm_test_buddy_alloc_clear(struct kunit *test)
drm_buddy_fini(&mm);
/*
- * Create a new mm with a non power-of-two size. Allocate a random size, free as
- * cleared and then call fini. This will ensure the multi-root force merge during
- * fini.
+ * Create a new mm with a non power-of-two size. Allocate a random size from each
+ * root, free as cleared and then call fini. This will ensure the multi-root
+ * force merge during fini.
*/
- mm_size = 12 * SZ_4K;
- size = max(round_up(prandom_u32_state(&prng) % mm_size, ps), ps);
+ mm_size = (SZ_4K << max_order) + (SZ_4K << (max_order - 2));
+
KUNIT_EXPECT_FALSE(test, drm_buddy_init(&mm, mm_size, ps));
- KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, 0, mm_size,
- size, ps, &allocated,
- DRM_BUDDY_TOPDOWN_ALLOCATION),
- "buddy_alloc hit an error size=%u\n", size);
+ KUNIT_EXPECT_EQ(test, mm.max_order, max_order);
+ KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, 0, SZ_4K << max_order,
+ 4 * ps, ps, &allocated,
+ DRM_BUDDY_RANGE_ALLOCATION),
+ "buddy_alloc hit an error size=%lu\n", 4 * ps);
+ drm_buddy_free_list(&mm, &allocated, DRM_BUDDY_CLEARED);
+ KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, 0, SZ_4K << max_order,
+ 2 * ps, ps, &allocated,
+ DRM_BUDDY_CLEAR_ALLOCATION),
+ "buddy_alloc hit an error size=%lu\n", 2 * ps);
+ drm_buddy_free_list(&mm, &allocated, DRM_BUDDY_CLEARED);
+ KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, SZ_4K << max_order, mm_size,
+ ps, ps, &allocated,
+ DRM_BUDDY_RANGE_ALLOCATION),
+ "buddy_alloc hit an error size=%lu\n", ps);
drm_buddy_free_list(&mm, &allocated, DRM_BUDDY_CLEARED);
drm_buddy_fini(&mm);
}
