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drm/selftests: add drm buddy alloc limit testcase 

add a test to check the maximum allocation limit

v2(Matthew Auld):
  - added err = -EINVAL in block NULL check
  - removed unnecessary test succeeded print

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/20220222174845.2175-2-Arunpravin.PaneerSelvam@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Arunpravin 2022-02-22 23:18:40 +05:30 committed by Christian König
parent 3d515ba9ea
commit cb8f00f27a
2 changed files with 60 additions and 0 deletions
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1
drivers/gpu/drm/selftests/drm_buddy_selftests.h
View File

@ -7,3 +7,4 @@
* Tests are executed in order by igt/drm_buddy
*/
selftest(sanitycheck, igt_sanitycheck) /* keep first (selfcheck for igt) */
selftest(buddy_alloc_limit, igt_buddy_alloc_limit)

59
drivers/gpu/drm/selftests/test-drm_buddy.c
View File

@ -16,6 +16,65 @@
static unsigned int random_seed;
static int igt_buddy_alloc_limit(void *arg)
{
u64 end, size = U64_MAX, start = 0;
struct drm_buddy_block *block;
unsigned long flags = 0;
LIST_HEAD(allocated);
struct drm_buddy mm;
int err;
size = end = round_down(size, 4096);
err = drm_buddy_init(&mm, size, PAGE_SIZE);
if (err)
return err;
if (mm.max_order != DRM_BUDDY_MAX_ORDER) {
pr_err("mm.max_order(%d) != %d\n",
mm.max_order, DRM_BUDDY_MAX_ORDER);
err = -EINVAL;
goto out_fini;
}
err = drm_buddy_alloc_blocks(&mm, start, end, size,
PAGE_SIZE, &allocated, flags);
if (unlikely(err))
goto out_free;
block = list_first_entry_or_null(&allocated,
struct drm_buddy_block,
link);
if (!block) {
err = -EINVAL;
goto out_fini;
}
if (drm_buddy_block_order(block) != mm.max_order) {
pr_err("block order(%d) != %d\n",
drm_buddy_block_order(block), mm.max_order);
err = -EINVAL;
goto out_free;
}
if (drm_buddy_block_size(&mm, block) !=
BIT_ULL(mm.max_order) * PAGE_SIZE) {
pr_err("block size(%llu) != %llu\n",
drm_buddy_block_size(&mm, block),
BIT_ULL(mm.max_order) * PAGE_SIZE);
err = -EINVAL;
goto out_free;
}
out_free:
drm_buddy_free_list(&mm, &allocated);
out_fini:
drm_buddy_fini(&mm);
return err;
}
static int igt_sanitycheck(void *ignored)
{
pr_info("%s - ok!\n", __func__);