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drm/selftests: add drm buddy optimistic testcase

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create a mm with one block of each order available, and
try to allocate them all.

v2(Matthew Auld):
  - removed unnecessary test succeeded print
  - replace list_del()/list_add_tail() with list_move_tail()

Signed-off-by: Arunpravin <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220222174845.2175-4-Arunpravin.PaneerSelvam@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Arunpravin 2022-02-22 23:18:42 +05:30 committed by Christian König
parent 92937f170d
commit 4010ce9fb6
2 changed files with 81 additions and 0 deletions
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1
drivers/gpu/drm/selftests/drm_buddy_selftests.h
View File

@ -9,3 +9,4 @@
selftest(sanitycheck, igt_sanitycheck) /* keep first (selfcheck for igt) */
selftest(buddy_alloc_limit, igt_buddy_alloc_limit)
selftest(buddy_alloc_range, igt_buddy_alloc_range)
selftest(buddy_alloc_optimistic, igt_buddy_alloc_optimistic)

80
drivers/gpu/drm/selftests/test-drm_buddy.c
View File

@ -17,6 +17,11 @@
static unsigned int random_seed;
static inline u64 get_size(int order, u64 chunk_size)
{
return (1 << order) * chunk_size;
}
static inline const char *yesno(bool v)
{
return v ? "yes" : "no";
@ -309,6 +314,81 @@ static void igt_mm_config(u64 *size, u64 *chunk_size)
*size = (u64)s << 12;
}
static int igt_buddy_alloc_optimistic(void *arg)
{
u64 mm_size, size, min_page_size, start = 0;
struct drm_buddy_block *block;
unsigned long flags = 0;
const int max_order = 16;
struct drm_buddy mm;
LIST_HEAD(blocks);
LIST_HEAD(tmp);
int order, err;
/*
* Create a mm with one block of each order available, and
* try to allocate them all.
*/
mm_size = PAGE_SIZE * ((1 << (max_order + 1)) - 1);
err = drm_buddy_init(&mm,
mm_size,
PAGE_SIZE);
if (err) {
pr_err("buddy_init failed(%d)\n", err);
return err;
}
BUG_ON(mm.max_order != max_order);
for (order = 0; order <= max_order; order++) {
size = min_page_size = get_size(order, PAGE_SIZE);
err = drm_buddy_alloc_blocks(&mm, start, mm_size, size, min_page_size, &tmp, flags);
if (err) {
pr_info("buddy_alloc hit -ENOMEM with order=%d\n",
order);
goto err;
}
block = list_first_entry_or_null(&tmp,
struct drm_buddy_block,
link);
if (!block) {
pr_err("alloc_blocks has no blocks\n");
err = -EINVAL;
goto err;
}
list_move_tail(&block->link, &blocks);
}
/* Should be completely full! */
size = min_page_size = get_size(0, PAGE_SIZE);
err = drm_buddy_alloc_blocks(&mm, start, mm_size, size, min_page_size, &tmp, flags);
if (!err) {
pr_info("buddy_alloc unexpectedly succeeded, it should be full!");
block = list_first_entry_or_null(&tmp,
struct drm_buddy_block,
link);
if (!block) {
pr_err("alloc_blocks has no blocks\n");
err = -EINVAL;
goto err;
}
list_move_tail(&block->link, &blocks);
err = -EINVAL;
goto err;
} else {
err = 0;
}
err:
drm_buddy_free_list(&mm, &blocks);
drm_buddy_fini(&mm);
return err;
}
static int igt_buddy_alloc_range(void *arg)
{
unsigned long flags = DRM_BUDDY_RANGE_ALLOCATION;