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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.c465
1 files changed, 0 insertions, 465 deletions
diff --git a/drivers/gpu/drm/tests/drm_buddy_test.c b/drivers/gpu/drm/tests/drm_buddy_test.c
index 09ee6f6af896..ea2af6bd9abe 100644
--- a/drivers/gpu/drm/tests/drm_buddy_test.c
+++ b/drivers/gpu/drm/tests/drm_buddy_test.c
@@ -13,315 +13,11 @@
#include "../lib/drm_random.h"
-#define TIMEOUT(name__) \
- unsigned long name__ = jiffies + MAX_SCHEDULE_TIMEOUT
-
-static unsigned int random_seed;
-
static inline u64 get_size(int order, u64 chunk_size)
{
return (1 << order) * chunk_size;
}
-__printf(2, 3)
-static bool __timeout(unsigned long timeout, const char *fmt, ...)
-{
- va_list va;
-
- if (!signal_pending(current)) {
- cond_resched();
- if (time_before(jiffies, timeout))
- return false;
- }
-
- if (fmt) {
- va_start(va, fmt);
- vprintk(fmt, va);
- va_end(va);
- }
-
- return true;
-}
-
-static void __dump_block(struct kunit *test, struct drm_buddy *mm,
- struct drm_buddy_block *block, bool buddy)
-{
- kunit_err(test, "block info: header=%llx, state=%u, order=%d, offset=%llx size=%llx root=%d buddy=%d\n",
- block->header, drm_buddy_block_state(block),
- drm_buddy_block_order(block), drm_buddy_block_offset(block),
- drm_buddy_block_size(mm, block), !block->parent, buddy);
-}
-
-static void dump_block(struct kunit *test, struct drm_buddy *mm,
- struct drm_buddy_block *block)
-{
- struct drm_buddy_block *buddy;
-
- __dump_block(test, mm, block, false);
-
- buddy = drm_get_buddy(block);
- if (buddy)
- __dump_block(test, mm, buddy, true);
-}
-
-static int check_block(struct kunit *test, struct drm_buddy *mm,
- struct drm_buddy_block *block)
-{
- struct drm_buddy_block *buddy;
- unsigned int block_state;
- u64 block_size;
- u64 offset;
- int err = 0;
-
- block_state = drm_buddy_block_state(block);
-
- if (block_state != DRM_BUDDY_ALLOCATED &&
- block_state != DRM_BUDDY_FREE && block_state != DRM_BUDDY_SPLIT) {
- kunit_err(test, "block state mismatch\n");
- err = -EINVAL;
- }
-
- block_size = drm_buddy_block_size(mm, block);
- offset = drm_buddy_block_offset(block);
-
- if (block_size < mm->chunk_size) {
- kunit_err(test, "block size smaller than min size\n");
- err = -EINVAL;
- }
-
- /* We can't use is_power_of_2() for a u64 on 32-bit systems. */
- if (block_size & (block_size - 1)) {
- kunit_err(test, "block size not power of two\n");
- err = -EINVAL;
- }
-
- if (!IS_ALIGNED(block_size, mm->chunk_size)) {
- kunit_err(test, "block size not aligned to min size\n");
- err = -EINVAL;
- }
-
- if (!IS_ALIGNED(offset, mm->chunk_size)) {
- kunit_err(test, "block offset not aligned to min size\n");
- err = -EINVAL;
- }
-
- if (!IS_ALIGNED(offset, block_size)) {
- kunit_err(test, "block offset not aligned to block size\n");
- err = -EINVAL;
- }
-
- buddy = drm_get_buddy(block);
-
- if (!buddy && block->parent) {
- kunit_err(test, "buddy has gone fishing\n");
- err = -EINVAL;
- }
-
- if (buddy) {
- if (drm_buddy_block_offset(buddy) != (offset ^ block_size)) {
- kunit_err(test, "buddy has wrong offset\n");
- err = -EINVAL;
- }
-
- if (drm_buddy_block_size(mm, buddy) != block_size) {
- kunit_err(test, "buddy size mismatch\n");
- err = -EINVAL;
- }
-
- if (drm_buddy_block_state(buddy) == block_state &&
- block_state == DRM_BUDDY_FREE) {
- kunit_err(test, "block and its buddy are free\n");
- err = -EINVAL;
- }
- }
-
- return err;
-}
-
-static int check_blocks(struct kunit *test, struct drm_buddy *mm,
- struct list_head *blocks, u64 expected_size, bool is_contiguous)
-{
- struct drm_buddy_block *block;
- struct drm_buddy_block *prev;
- u64 total;
- int err = 0;
-
- block = NULL;
- prev = NULL;
- total = 0;
-
- list_for_each_entry(block, blocks, link) {
- err = check_block(test, mm, block);
-
- if (!drm_buddy_block_is_allocated(block)) {
- kunit_err(test, "block not allocated\n");
- err = -EINVAL;
- }
-
- if (is_contiguous && prev) {
- u64 prev_block_size;
- u64 prev_offset;
- u64 offset;
-
- prev_offset = drm_buddy_block_offset(prev);
- prev_block_size = drm_buddy_block_size(mm, prev);
- offset = drm_buddy_block_offset(block);
-
- if (offset != (prev_offset + prev_block_size)) {
- kunit_err(test, "block offset mismatch\n");
- err = -EINVAL;
- }
- }
-
- if (err)
- break;
-
- total += drm_buddy_block_size(mm, block);
- prev = block;
- }
-
- if (!err) {
- if (total != expected_size) {
- kunit_err(test, "size mismatch, expected=%llx, found=%llx\n",
- expected_size, total);
- err = -EINVAL;
- }
- return err;
- }
-
- if (prev) {
- kunit_err(test, "prev block, dump:\n");
- dump_block(test, mm, prev);
- }
-
- kunit_err(test, "bad block, dump:\n");
- dump_block(test, mm, block);
-
- return err;
-}
-
-static int check_mm(struct kunit *test, struct drm_buddy *mm)
-{
- struct drm_buddy_block *root;
- struct drm_buddy_block *prev;
- unsigned int i;
- u64 total;
- int err = 0;
-
- if (!mm->n_roots) {
- kunit_err(test, "n_roots is zero\n");
- return -EINVAL;
- }
-
- if (mm->n_roots != hweight64(mm->size)) {
- kunit_err(test, "n_roots mismatch, n_roots=%u, expected=%lu\n",
- mm->n_roots, hweight64(mm->size));
- return -EINVAL;
- }
-
- root = NULL;
- prev = NULL;
- total = 0;
-
- for (i = 0; i < mm->n_roots; ++i) {
- struct drm_buddy_block *block;
- unsigned int order;
-
- root = mm->roots[i];
- if (!root) {
- kunit_err(test, "root(%u) is NULL\n", i);
- err = -EINVAL;
- break;
- }
-
- err = check_block(test, mm, root);
-
- if (!drm_buddy_block_is_free(root)) {
- kunit_err(test, "root not free\n");
- err = -EINVAL;
- }
-
- order = drm_buddy_block_order(root);
-
- if (!i) {
- if (order != mm->max_order) {
- kunit_err(test, "max order root missing\n");
- err = -EINVAL;
- }
- }
-
- if (prev) {
- u64 prev_block_size;
- u64 prev_offset;
- u64 offset;
-
- prev_offset = drm_buddy_block_offset(prev);
- prev_block_size = drm_buddy_block_size(mm, prev);
- offset = drm_buddy_block_offset(root);
-
- if (offset != (prev_offset + prev_block_size)) {
- kunit_err(test, "root offset mismatch\n");
- err = -EINVAL;
- }
- }
-
- block = list_first_entry_or_null(&mm->free_list[order],
- struct drm_buddy_block, link);
- if (block != root) {
- kunit_err(test, "root mismatch at order=%u\n", order);
- err = -EINVAL;
- }
-
- if (err)
- break;
-
- prev = root;
- total += drm_buddy_block_size(mm, root);
- }
-
- if (!err) {
- if (total != mm->size) {
- kunit_err(test, "expected mm size=%llx, found=%llx\n",
- mm->size, total);
- err = -EINVAL;
- }
- return err;
- }
-
- if (prev) {
- kunit_err(test, "prev root(%u), dump:\n", i - 1);
- dump_block(test, mm, prev);
- }
-
- if (root) {
- kunit_err(test, "bad root(%u), dump:\n", i);
- dump_block(test, mm, root);
- }
-
- return err;
-}
-
-static void mm_config(u64 *size, u64 *chunk_size)
-{
- DRM_RND_STATE(prng, random_seed);
- u32 s, ms;
-
- /* Nothing fancy, just try to get an interesting bit pattern */
-
- prandom_seed_state(&prng, random_seed);
-
- /* Let size be a random number of pages up to 8 GB (2M pages) */
- s = 1 + drm_prandom_u32_max_state((BIT(33 - 12)) - 1, &prng);
- /* Let the chunk size be a random power of 2 less than size */
- ms = BIT(drm_prandom_u32_max_state(ilog2(s), &prng));
- /* Round size down to the chunk size */
- s &= -ms;
-
- /* Convert from pages to bytes */
- *chunk_size = (u64)ms << 12;
- *size = (u64)s << 12;
-}
-
static void drm_test_buddy_alloc_pathological(struct kunit *test)
{
u64 mm_size, size, start = 0;
@@ -403,96 +99,6 @@ static void drm_test_buddy_alloc_pathological(struct kunit *test)
drm_buddy_fini(&mm);
}
-static void drm_test_buddy_alloc_smoke(struct kunit *test)
-{
- u64 mm_size, chunk_size, start = 0;
- unsigned long flags = 0;
- struct drm_buddy mm;
- int *order;
- int i;
-
- DRM_RND_STATE(prng, random_seed);
- TIMEOUT(end_time);
-
- mm_config(&mm_size, &chunk_size);
-
- KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, mm_size, chunk_size),
- "buddy_init failed\n");
-
- order = drm_random_order(mm.max_order + 1, &prng);
- KUNIT_ASSERT_TRUE(test, order);
-
- for (i = 0; i <= mm.max_order; ++i) {
- struct drm_buddy_block *block;
- int max_order = order[i];
- bool timeout = false;
- LIST_HEAD(blocks);
- u64 total, size;
- LIST_HEAD(tmp);
- int order, err;
-
- KUNIT_ASSERT_FALSE_MSG(test, check_mm(test, &mm),
- "pre-mm check failed, abort\n");
-
- order = max_order;
- total = 0;
-
- do {
-retry:
- size = get_size(order, chunk_size);
- err = drm_buddy_alloc_blocks(&mm, start, mm_size, size, size, &tmp, flags);
- if (err) {
- if (err == -ENOMEM) {
- KUNIT_FAIL(test, "buddy_alloc hit -ENOMEM with order=%d\n",
- order);
- } else {
- if (order--) {
- err = 0;
- goto retry;
- }
-
- KUNIT_FAIL(test, "buddy_alloc with order=%d failed\n",
- order);
- }
-
- break;
- }
-
- block = list_first_entry_or_null(&tmp, struct drm_buddy_block, link);
- KUNIT_ASSERT_TRUE_MSG(test, block, "alloc_blocks has no blocks\n");
-
- list_move_tail(&block->link, &blocks);
- KUNIT_EXPECT_EQ_MSG(test, drm_buddy_block_order(block), order,
- "buddy_alloc order mismatch\n");
-
- total += drm_buddy_block_size(&mm, block);
-
- if (__timeout(end_time, NULL)) {
- timeout = true;
- break;
- }
- } while (total < mm.size);
-
- if (!err)
- err = check_blocks(test, &mm, &blocks, total, false);
-
- drm_buddy_free_list(&mm, &blocks);
-
- if (!err) {
- KUNIT_EXPECT_FALSE_MSG(test, check_mm(test, &mm),
- "post-mm check failed\n");
- }
-
- if (err || timeout)
- break;
-
- cond_resched();
- }
-
- kfree(order);
- drm_buddy_fini(&mm);
-}
-
static void drm_test_buddy_alloc_pessimistic(struct kunit *test)
{
u64 mm_size, size, start = 0;
@@ -634,64 +240,6 @@ static void drm_test_buddy_alloc_optimistic(struct kunit *test)
drm_buddy_fini(&mm);
}
-static void drm_test_buddy_alloc_range(struct kunit *test)
-{
- unsigned long flags = DRM_BUDDY_RANGE_ALLOCATION;
- u64 offset, size, rem, chunk_size, end;
- unsigned long page_num;
- struct drm_buddy mm;
- LIST_HEAD(blocks);
-
- mm_config(&size, &chunk_size);
-
- KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_init(&mm, size, chunk_size),
- "buddy_init failed");
-
- KUNIT_ASSERT_FALSE_MSG(test, check_mm(test, &mm),
- "pre-mm check failed, abort!");
-
- rem = mm.size;
- offset = 0;
-
- for_each_prime_number_from(page_num, 1, ULONG_MAX - 1) {
- struct drm_buddy_block *block;
- LIST_HEAD(tmp);
-
- size = min(page_num * mm.chunk_size, rem);
- end = offset + size;
-
- KUNIT_ASSERT_FALSE_MSG(test, drm_buddy_alloc_blocks(&mm, offset, end,
- size, mm.chunk_size,
- &tmp, flags),
- "alloc_range with offset=%llx, size=%llx failed\n", offset, size);
-
- block = list_first_entry_or_null(&tmp, struct drm_buddy_block, link);
- KUNIT_ASSERT_TRUE_MSG(test, block, "alloc_range has no blocks\n");
-
- KUNIT_ASSERT_EQ_MSG(test, drm_buddy_block_offset(block), offset,
- "alloc_range start offset mismatch, found=%llx, expected=%llx\n",
- drm_buddy_block_offset(block), offset);
-
- KUNIT_ASSERT_FALSE(test, check_blocks(test, &mm, &tmp, size, true));
-
- list_splice_tail(&tmp, &blocks);
-
- offset += size;
-
- rem -= size;
- if (!rem)
- break;
-
- cond_resched();
- }
-
- drm_buddy_free_list(&mm, &blocks);
-
- KUNIT_EXPECT_FALSE_MSG(test, check_mm(test, &mm), "post-mm check failed\n");
-
- drm_buddy_fini(&mm);
-}
-
static void drm_test_buddy_alloc_limit(struct kunit *test)
{
u64 size = U64_MAX, start = 0;
@@ -727,29 +275,16 @@ static void drm_test_buddy_alloc_limit(struct kunit *test)
drm_buddy_fini(&mm);
}
-static int drm_buddy_suite_init(struct kunit_suite *suite)
-{
- while (!random_seed)
- random_seed = get_random_u32();
-
- kunit_info(suite, "Testing DRM buddy manager, with random_seed=0x%x\n", random_seed);
-
- return 0;
-}
-
static struct kunit_case drm_buddy_tests[] = {
KUNIT_CASE(drm_test_buddy_alloc_limit),
- KUNIT_CASE(drm_test_buddy_alloc_range),
KUNIT_CASE(drm_test_buddy_alloc_optimistic),
KUNIT_CASE(drm_test_buddy_alloc_pessimistic),
- KUNIT_CASE(drm_test_buddy_alloc_smoke),
KUNIT_CASE(drm_test_buddy_alloc_pathological),
{}
};
static struct kunit_suite drm_buddy_test_suite = {
.name = "drm_buddy",
- .suite_init = drm_buddy_suite_init,
.test_cases = drm_buddy_tests,
};