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drm/buddy: Add a testcase to verify the multiroot fini

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- 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@amd.com>
Signed-off-by: Lin.Cao <lincao12@amd.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241226070116.309290-2-Arunpravin.PaneerSelvam@amd.com
This commit is contained in:
Arunpravin Paneer Selvam 2024-12-26 12:31:16 +05:30
parent 467dce3817
commit 8cb3a1e2b3
2 changed files with 25 additions and 10 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/gpu/drm/drm_buddy.c
View file

@ -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;

29
drivers/gpu/drm/tests/drm_buddy_test.c
View file

@ -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);
}