diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/tests/drm_buddy_test.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tests/drm_buddy_test.c b/drivers/gpu/drm/tests/drm_buddy_test.c index e3b50e240d36..b3be68b03610 100644 --- a/drivers/gpu/drm/tests/drm_buddy_test.c +++ b/drivers/gpu/drm/tests/drm_buddy_test.c @@ -23,9 +23,11 @@ static inline u64 get_size(int order, u64 chunk_size) static void drm_test_buddy_alloc_range_bias(struct kunit *test) { - u32 mm_size, ps, bias_size, bias_start, bias_end, bias_rem; + u32 mm_size, size, ps, bias_size, bias_start, bias_end, bias_rem; DRM_RND_STATE(prng, random_seed); unsigned int i, count, *order; + struct drm_buddy_block *block; + unsigned long flags; struct drm_buddy mm; LIST_HEAD(allocated); @@ -222,6 +224,38 @@ static void drm_test_buddy_alloc_range_bias(struct kunit *test) drm_buddy_free_list(&mm, &allocated, 0); drm_buddy_fini(&mm); + + /* + * Allocate cleared blocks in the bias range when the DRM buddy's clear avail is + * zero. This will validate the bias range allocation in scenarios like system boot + * when no cleared blocks are available and exercise the fallback path too. The resulting + * blocks should always be dirty. + */ + + KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, ps), + "buddy_init failed\n"); + + bias_start = round_up(prandom_u32_state(&prng) % (mm_size - ps), ps); + bias_end = round_up(bias_start + prandom_u32_state(&prng) % (mm_size - bias_start), ps); + bias_end = max(bias_end, bias_start + ps); + bias_rem = bias_end - bias_start; + + flags = DRM_BUDDY_CLEAR_ALLOCATION | DRM_BUDDY_RANGE_ALLOCATION; + size = max(round_up(prandom_u32_state(&prng) % bias_rem, ps), ps); + + KUNIT_ASSERT_FALSE_MSG(test, + drm_buddy_alloc_blocks(&mm, bias_start, + bias_end, size, ps, + &allocated, + flags), + "buddy_alloc failed with bias(%x-%x), size=%u, ps=%u\n", + bias_start, bias_end, size, ps); + + list_for_each_entry(block, &allocated, link) + KUNIT_EXPECT_EQ(test, drm_buddy_block_is_clear(block), false); + + drm_buddy_free_list(&mm, &allocated, 0); + drm_buddy_fini(&mm); } static void drm_test_buddy_alloc_clear(struct kunit *test) |