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path: root/drivers/gpu/drm/tests/drm_buddy_test.c
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Diffstat (limited to 'drivers/gpu/drm/tests/drm_buddy_test.c')
-rw-r--r--drivers/gpu/drm/tests/drm_buddy_test.c78
1 files changed, 56 insertions, 22 deletions
diff --git a/drivers/gpu/drm/tests/drm_buddy_test.c b/drivers/gpu/drm/tests/drm_buddy_test.c
index e3b50e240d36..dd8fb9f8341a 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)
@@ -471,8 +505,8 @@ static void drm_test_buddy_alloc_pathological(struct kunit *test)
* Eventually we will have a fully 50% fragmented mm.
*/
- mm_size = PAGE_SIZE << max_order;
- KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, PAGE_SIZE),
+ mm_size = SZ_4K << max_order;
+ KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, SZ_4K),
"buddy_init failed\n");
KUNIT_EXPECT_EQ(test, mm.max_order, max_order);
@@ -486,7 +520,7 @@ static void drm_test_buddy_alloc_pathological(struct kunit *test)
}
for (order = top; order--;) {
- size = get_size(order, PAGE_SIZE);
+ size = get_size(order, mm.chunk_size);
KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, start,
mm_size, size, size,
&tmp, flags),
@@ -500,7 +534,7 @@ static void drm_test_buddy_alloc_pathological(struct kunit *test)
}
/* There should be one final page for this sub-allocation */
- size = get_size(0, PAGE_SIZE);
+ size = get_size(0, mm.chunk_size);
KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc hit -ENOMEM for hole\n");
@@ -510,7 +544,7 @@ static void drm_test_buddy_alloc_pathological(struct kunit *test)
list_move_tail(&block->link, &holes);
- size = get_size(top, PAGE_SIZE);
+ size = get_size(top, mm.chunk_size);
KUNIT_ASSERT_TRUE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc unexpectedly succeeded at top-order %d/%d, it should be full!",
@@ -521,7 +555,7 @@ static void drm_test_buddy_alloc_pathological(struct kunit *test)
/* Nothing larger than blocks of chunk_size now available */
for (order = 1; order <= max_order; order++) {
- size = get_size(order, PAGE_SIZE);
+ size = get_size(order, mm.chunk_size);
KUNIT_ASSERT_TRUE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc unexpectedly succeeded at order %d, it should be full!",
@@ -550,14 +584,14 @@ static void drm_test_buddy_alloc_pessimistic(struct kunit *test)
* page left.
*/
- mm_size = PAGE_SIZE << max_order;
- KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, PAGE_SIZE),
+ mm_size = SZ_4K << max_order;
+ KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, SZ_4K),
"buddy_init failed\n");
KUNIT_EXPECT_EQ(test, mm.max_order, max_order);
for (order = 0; order < max_order; order++) {
- size = get_size(order, PAGE_SIZE);
+ size = get_size(order, mm.chunk_size);
KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc hit -ENOMEM with order=%d\n",
@@ -570,7 +604,7 @@ static void drm_test_buddy_alloc_pessimistic(struct kunit *test)
}
/* And now the last remaining block available */
- size = get_size(0, PAGE_SIZE);
+ size = get_size(0, mm.chunk_size);
KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc hit -ENOMEM on final alloc\n");
@@ -582,7 +616,7 @@ static void drm_test_buddy_alloc_pessimistic(struct kunit *test)
/* Should be completely full! */
for (order = max_order; order--;) {
- size = get_size(order, PAGE_SIZE);
+ size = get_size(order, mm.chunk_size);
KUNIT_ASSERT_TRUE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc unexpectedly succeeded, it should be full!");
@@ -598,7 +632,7 @@ static void drm_test_buddy_alloc_pessimistic(struct kunit *test)
list_del(&block->link);
drm_buddy_free_block(&mm, block);
- size = get_size(order, PAGE_SIZE);
+ size = get_size(order, mm.chunk_size);
KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc hit -ENOMEM with order=%d\n",
@@ -613,7 +647,7 @@ static void drm_test_buddy_alloc_pessimistic(struct kunit *test)
}
/* To confirm, now the whole mm should be available */
- size = get_size(max_order, PAGE_SIZE);
+ size = get_size(max_order, mm.chunk_size);
KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc (realloc) hit -ENOMEM with order=%d\n",
@@ -644,15 +678,15 @@ static void drm_test_buddy_alloc_optimistic(struct kunit *test)
* try to allocate them all.
*/
- mm_size = PAGE_SIZE * ((1 << (max_order + 1)) - 1);
+ mm_size = SZ_4K * ((1 << (max_order + 1)) - 1);
- KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, PAGE_SIZE),
+ KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, SZ_4K),
"buddy_init failed\n");
KUNIT_EXPECT_EQ(test, mm.max_order, max_order);
for (order = 0; order <= max_order; order++) {
- size = get_size(order, PAGE_SIZE);
+ size = get_size(order, mm.chunk_size);
KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc hit -ENOMEM with order=%d\n",
@@ -665,7 +699,7 @@ static void drm_test_buddy_alloc_optimistic(struct kunit *test)
}
/* Should be completely full! */
- size = get_size(0, PAGE_SIZE);
+ size = get_size(0, mm.chunk_size);
KUNIT_ASSERT_TRUE_MSG(test, drm_buddy_alloc_blocks(&mm, start, mm_size,
size, size, &tmp, flags),
"buddy_alloc unexpectedly succeeded, it should be full!");
@@ -682,7 +716,7 @@ static void drm_test_buddy_alloc_limit(struct kunit *test)
LIST_HEAD(allocated);
struct drm_buddy mm;
- KUNIT_EXPECT_FALSE(test, drm_buddy_init(&mm, size, PAGE_SIZE));
+ KUNIT_EXPECT_FALSE(test, drm_buddy_init(&mm, size, SZ_4K));
KUNIT_EXPECT_EQ_MSG(test, mm.max_order, DRM_BUDDY_MAX_ORDER,
"mm.max_order(%d) != %d\n", mm.max_order,
@@ -690,7 +724,7 @@ static void drm_test_buddy_alloc_limit(struct kunit *test)
size = mm.chunk_size << mm.max_order;
KUNIT_EXPECT_FALSE(test, drm_buddy_alloc_blocks(&mm, start, size, size,
- PAGE_SIZE, &allocated, flags));
+ mm.chunk_size, &allocated, flags));
block = list_first_entry_or_null(&allocated, struct drm_buddy_block, link);
KUNIT_EXPECT_TRUE(test, block);
@@ -700,10 +734,10 @@ static void drm_test_buddy_alloc_limit(struct kunit *test)
drm_buddy_block_order(block), mm.max_order);
KUNIT_EXPECT_EQ_MSG(test, drm_buddy_block_size(&mm, block),
- BIT_ULL(mm.max_order) * PAGE_SIZE,
+ BIT_ULL(mm.max_order) * mm.chunk_size,
"block size(%llu) != %llu\n",
drm_buddy_block_size(&mm, block),
- BIT_ULL(mm.max_order) * PAGE_SIZE);
+ BIT_ULL(mm.max_order) * mm.chunk_size);
drm_buddy_free_list(&mm, &allocated, 0);
drm_buddy_fini(&mm);
generated by cgit (git 2.34.1) at 2025-12-24 23:58:40 +0000