3  * KUnit test suite for GEM objects backed by shmem buffers
38  * Test creating a shmem GEM object backed by shmem buffer. The test
40  * shmem file node and object functions attributes set, and the size
46 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_obj_create()  local
48 	shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE);  in drm_gem_shmem_test_obj_create()
49 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem);  in drm_gem_shmem_test_obj_create()
50 	KUNIT_EXPECT_EQ(test, shmem->base.size, TEST_SIZE);  in drm_gem_shmem_test_obj_create()
51 	KUNIT_EXPECT_NOT_NULL(test, shmem->base.filp);  in drm_gem_shmem_test_obj_create()
52 	KUNIT_EXPECT_NOT_NULL(test, shmem->base.funcs);  in drm_gem_shmem_test_obj_create()
54 	drm_gem_shmem_free(shmem);  in drm_gem_shmem_test_obj_create()
58  * Test creating a shmem GEM object from a scatter/gather table exported
60  * created with the shmem file node attribute equal to NULL and the sgt
66 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_obj_create_private()  local
117 	shmem = to_drm_gem_shmem_obj(gem_obj);  in drm_gem_shmem_test_obj_create_private()
118 	KUNIT_EXPECT_PTR_EQ(test, shmem->sgt, sgt);  in drm_gem_shmem_test_obj_create_private()
120 	drm_gem_shmem_free(shmem);  in drm_gem_shmem_test_obj_create_private()
124  * Test pinning backing pages for a shmem GEM object. The test case
131 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_pin_pages()  local
134 	shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE);  in drm_gem_shmem_test_pin_pages()
135 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem);  in drm_gem_shmem_test_pin_pages()
136 	KUNIT_EXPECT_NULL(test, shmem->pages);  in drm_gem_shmem_test_pin_pages()
137 	KUNIT_EXPECT_EQ(test, shmem->pages_use_count, 0);  in drm_gem_shmem_test_pin_pages()
139 	ret = kunit_add_action_or_reset(test, drm_gem_shmem_free_wrapper, shmem);  in drm_gem_shmem_test_pin_pages()
142 	ret = drm_gem_shmem_pin(shmem);  in drm_gem_shmem_test_pin_pages()
144 	KUNIT_ASSERT_NOT_NULL(test, shmem->pages);  in drm_gem_shmem_test_pin_pages()
145 	KUNIT_EXPECT_EQ(test, shmem->pages_use_count, 1);  in drm_gem_shmem_test_pin_pages()
147 	for (i = 0; i < (shmem->base.size >> PAGE_SHIFT); i++)  in drm_gem_shmem_test_pin_pages()
148 		KUNIT_ASSERT_NOT_NULL(test, shmem->pages[i]);  in drm_gem_shmem_test_pin_pages()
150 	drm_gem_shmem_unpin(shmem);  in drm_gem_shmem_test_pin_pages()
151 	KUNIT_EXPECT_NULL(test, shmem->pages);  in drm_gem_shmem_test_pin_pages()
152 	KUNIT_EXPECT_EQ(test, shmem->pages_use_count, 0);  in drm_gem_shmem_test_pin_pages()
156  * Test creating a virtual mapping for a shmem GEM object. The test
164 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_vmap()  local
168 	shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE);  in drm_gem_shmem_test_vmap()
169 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem);  in drm_gem_shmem_test_vmap()
170 	KUNIT_EXPECT_NULL(test, shmem->vaddr);  in drm_gem_shmem_test_vmap()
171 	KUNIT_EXPECT_EQ(test, shmem->vmap_use_count, 0);  in drm_gem_shmem_test_vmap()
173 	ret = kunit_add_action_or_reset(test, drm_gem_shmem_free_wrapper, shmem);  in drm_gem_shmem_test_vmap()
176 	ret = drm_gem_shmem_vmap(shmem, &map);  in drm_gem_shmem_test_vmap()
178 	KUNIT_ASSERT_NOT_NULL(test, shmem->vaddr);  in drm_gem_shmem_test_vmap()
180 	KUNIT_EXPECT_EQ(test, shmem->vmap_use_count, 1);  in drm_gem_shmem_test_vmap()
186 	drm_gem_shmem_vunmap(shmem, &map);  in drm_gem_shmem_test_vmap()
187 	KUNIT_EXPECT_NULL(test, shmem->vaddr);  in drm_gem_shmem_test_vmap()
188 	KUNIT_EXPECT_EQ(test, shmem->vmap_use_count, 0);  in drm_gem_shmem_test_vmap()
193  * PRIME usage from a shmem GEM object. The test case succeeds if a
200 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_get_pages_sgt()  local
206 	shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE);  in drm_gem_shmem_test_get_pages_sgt()
207 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem);  in drm_gem_shmem_test_get_pages_sgt()
209 	ret = kunit_add_action_or_reset(test, drm_gem_shmem_free_wrapper, shmem);  in drm_gem_shmem_test_get_pages_sgt()
212 	ret = drm_gem_shmem_pin(shmem);  in drm_gem_shmem_test_get_pages_sgt()
215 	sgt = drm_gem_shmem_get_sg_table(shmem);  in drm_gem_shmem_test_get_pages_sgt()
217 	KUNIT_EXPECT_NULL(test, shmem->sgt);  in drm_gem_shmem_test_get_pages_sgt()
232  * driver usage from a shmem GEM object. The test case succeeds if the
239 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_get_sg_table()  local
244 	shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE);  in drm_gem_shmem_test_get_sg_table()
245 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem);  in drm_gem_shmem_test_get_sg_table()
247 	ret = kunit_add_action_or_reset(test, drm_gem_shmem_free_wrapper, shmem);  in drm_gem_shmem_test_get_sg_table()
251 	sgt = drm_gem_shmem_get_pages_sgt(shmem);  in drm_gem_shmem_test_get_sg_table()
253 	KUNIT_ASSERT_NOT_NULL(test, shmem->pages);  in drm_gem_shmem_test_get_sg_table()
254 	KUNIT_EXPECT_EQ(test, shmem->pages_use_count, 1);  in drm_gem_shmem_test_get_sg_table()
255 	KUNIT_EXPECT_PTR_EQ(test, sgt, shmem->sgt);  in drm_gem_shmem_test_get_sg_table()
266  * Test updating the madvise state of a shmem GEM object. The test
274 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_madvise()  local
277 	shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE);  in drm_gem_shmem_test_madvise()
278 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem);  in drm_gem_shmem_test_madvise()
279 	KUNIT_ASSERT_EQ(test, shmem->madv, 0);  in drm_gem_shmem_test_madvise()
281 	ret = kunit_add_action_or_reset(test, drm_gem_shmem_free_wrapper, shmem);  in drm_gem_shmem_test_madvise()
284 	ret = drm_gem_shmem_madvise(shmem, 1);  in drm_gem_shmem_test_madvise()
286 	KUNIT_ASSERT_EQ(test, shmem->madv, 1);  in drm_gem_shmem_test_madvise()
289 	ret = drm_gem_shmem_madvise(shmem, -1);  in drm_gem_shmem_test_madvise()
291 	KUNIT_ASSERT_EQ(test, shmem->madv, -1);  in drm_gem_shmem_test_madvise()
294 	ret = drm_gem_shmem_madvise(shmem, 0);  in drm_gem_shmem_test_madvise()
296 	KUNIT_ASSERT_EQ(test, shmem->madv, -1);  in drm_gem_shmem_test_madvise()
300  * Test purging a shmem GEM object. First, assert that a newly created
301  * shmem GEM object is not purgeable. Then, set madvise to a positive
303  * backing pages. Finally, assert that the shmem GEM object is now
309 	struct drm_gem_shmem_object *shmem;  in drm_gem_shmem_test_purge()  local
313 	shmem = drm_gem_shmem_create(drm_dev, TEST_SIZE);  in drm_gem_shmem_test_purge()
314 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, shmem);  in drm_gem_shmem_test_purge()
316 	ret = kunit_add_action_or_reset(test, drm_gem_shmem_free_wrapper, shmem);  in drm_gem_shmem_test_purge()
319 	ret = drm_gem_shmem_is_purgeable(shmem);  in drm_gem_shmem_test_purge()
322 	ret = drm_gem_shmem_madvise(shmem, 1);  in drm_gem_shmem_test_purge()
326 	sgt = drm_gem_shmem_get_pages_sgt(shmem);  in drm_gem_shmem_test_purge()
329 	ret = drm_gem_shmem_is_purgeable(shmem);  in drm_gem_shmem_test_purge()
332 	drm_gem_shmem_purge(shmem);  in drm_gem_shmem_test_purge()
333 	KUNIT_EXPECT_NULL(test, shmem->pages);  in drm_gem_shmem_test_purge()
334 	KUNIT_EXPECT_NULL(test, shmem->sgt);  in drm_gem_shmem_test_purge()
335 	KUNIT_EXPECT_EQ(test, shmem->madv, -1);  in drm_gem_shmem_test_purge()
381 MODULE_DESCRIPTION("KUnit test suite for GEM objects backed by shmem buffers");