Commit cb8f00f2 authored by Arunpravin's avatar Arunpravin Committed by Christian König
Browse files

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: default avatarArunpravin <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Acked-by: default avatarChristian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220222174845.2175-2-Arunpravin.PaneerSelvam@amd.com


Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
parent 3d515ba9

drivers/gpu/drm/selftests/drm_buddy_selftests.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

drivers/gpu/drm/selftests/test-drm_buddy.c

+59 −0
Original line number Diff line number Diff line
@@ -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__);