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Verify the creation of page pools if use_dma_alloc > param is true. > > Signed-off-by: Karolina Stolarek > --- > drivers/gpu/drm/ttm/tests/ttm_device_test.c | 159 ++++++++++++++++++++ > 1 file changed, 159 insertions(+) > > diff --git a/drivers/gpu/drm/ttm/tests/ttm_device_test.c b/drivers/gpu/drm/ttm/tests/ttm_device_test.c > index 08d7314b1e35..67f7ec347a61 100644 > --- a/drivers/gpu/drm/ttm/tests/ttm_device_test.c > +++ b/drivers/gpu/drm/ttm/tests/ttm_device_test.c > @@ -8,6 +8,13 @@ > > #include "ttm_kunit_helpers.h" > > +struct ttm_device_test_case { > + const char *description; > + bool use_dma_alloc; > + bool use_dma32; > + bool pools_init_expected; > +}; > + > static void ttm_device_init_basic(struct kunit *test) > { > struct ttm_test_devices_priv *priv = test->priv; > @@ -37,8 +44,160 @@ static void ttm_device_init_basic(struct kunit *test) > ttm_device_fini(ttm_dev); > } > > +static void ttm_device_init_multiple(struct kunit *test) > +{ > + struct ttm_test_devices_priv *priv = test->priv; > + struct ttm_device *ttm_devs; > + unsigned int i, num_dev = 3; > + int err; > + > + ttm_devs = kunit_kcalloc(test, num_dev, sizeof(*ttm_devs), GFP_KERNEL); > + KUNIT_ASSERT_NOT_NULL(test, ttm_devs); > + > + for (i = 0; i < num_dev; i++) { > + err = ttm_kunit_helper_alloc_device(test, &ttm_devs[i], > + false, false); > + KUNIT_ASSERT_EQ(test, err, 0); > + > + KUNIT_EXPECT_PTR_EQ(test, ttm_devs[i].dev_mapping, > + priv->drm->anon_inode->i_mapping); > + KUNIT_ASSERT_NOT_NULL(test, ttm_devs[i].wq); > + KUNIT_EXPECT_PTR_EQ(test, ttm_devs[i].funcs, &ttm_dev_funcs); > + KUNIT_ASSERT_NOT_NULL(test, ttm_devs[i].man_drv[TTM_PL_SYSTEM]); > + } > + > + KUNIT_ASSERT_EQ(test, list_count_nodes(&ttm_devs[0].device_list), num_dev); > + > + for (i = 0; i < num_dev; i++) > + ttm_device_fini(&ttm_devs[i]); > +} > + > +static void ttm_device_fini_basic(struct kunit *test) > +{ > + struct ttm_device *ttm_dev; > + struct ttm_resource_manager *man; > + int err; > + > + ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL); > + KUNIT_ASSERT_NOT_NULL(test, ttm_dev); > + > + err = ttm_kunit_helper_alloc_device(test, ttm_dev, false, false); > + KUNIT_ASSERT_EQ(test, err, 0); > + > + man = ttm_manager_type(ttm_dev, TTM_PL_SYSTEM); > + KUNIT_ASSERT_NOT_NULL(test, man); > + > + ttm_device_fini(ttm_dev); > + > + KUNIT_ASSERT_FALSE(test, man->use_type); > + KUNIT_ASSERT_TRUE(test, list_empty(&man->lru[0])); > + KUNIT_ASSERT_NULL(test, ttm_dev->man_drv[TTM_PL_SYSTEM]); > +} > + > +static void ttm_device_init_no_vma_man(struct kunit *test) > +{ > + struct ttm_test_devices_priv *priv = test->priv; > + struct drm_device *drm = priv->drm; > + struct ttm_device *ttm_dev; > + struct drm_vma_offset_manager *vma_man; > + int err; > + > + ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL); > + KUNIT_ASSERT_NOT_NULL(test, ttm_dev); > + > + /* Let's pretend there's no VMA manager allocated */ > + vma_man = drm->vma_offset_manager; > + drm->vma_offset_manager = NULL; > + > + err = ttm_kunit_helper_alloc_device(test, ttm_dev, false, false); > + KUNIT_EXPECT_EQ(test, err, -EINVAL); > + > + /* Bring the manager back for a graceful cleanup */ > + drm->vma_offset_manager = vma_man; > +} > + > +static const struct ttm_device_test_case ttm_device_cases[] = { > + { > + .description = "No DMA allocations, no DMA32 required", > + .use_dma_alloc = false, > + .use_dma32 = false, > + .pools_init_expected = false, > + }, > + { > + .description = "DMA allocations, DMA32 required", > + .use_dma_alloc = true, > + .use_dma32 = true, > + .pools_init_expected = true, > + }, > + { > + .description = "No DMA allocations, DMA32 required", > + .use_dma_alloc = false, > + .use_dma32 = true, > + .pools_init_expected = false, > + }, > + { > + .description = "DMA allocations, no DMA32 required", > + .use_dma_alloc = true, > + .use_dma32 = false, > + .pools_init_expected = true, > + }, > +}; > + > +static void ttm_device_case_desc(const struct ttm_device_test_case *t, char *desc) > +{ > + strscpy(desc, t->description, KUNIT_PARAM_DESC_SIZE); > +} > + > +KUNIT_ARRAY_PARAM(ttm_device, ttm_device_cases, ttm_device_case_desc); > + > +static void ttm_device_init_pools(struct kunit *test) > +{ > + struct ttm_test_devices_priv *priv = test->priv; > + const struct ttm_device_test_case *params = test->param_value; > + struct ttm_device *ttm_dev; > + struct ttm_pool *pool; > + struct ttm_pool_type pt; > + int err; > + > + ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL); > + KUNIT_ASSERT_NOT_NULL(test, ttm_dev); > + > + err = ttm_kunit_helper_alloc_device(test, ttm_dev, > + params->use_dma_alloc, > + params->use_dma32); > + KUNIT_ASSERT_EQ(test, err, 0); > + > + pool = &ttm_dev->pool; > + KUNIT_ASSERT_NOT_NULL(test, pool); > + KUNIT_EXPECT_PTR_EQ(test, pool->dev, priv->dev); > + KUNIT_EXPECT_EQ(test, pool->use_dma_alloc, params->use_dma_alloc); > + KUNIT_EXPECT_EQ(test, pool->use_dma32, params->use_dma32); > + > + if (params->pools_init_expected) { > + for (int i = 0; i < TTM_NUM_CACHING_TYPES; ++i) { > + for (int j = 0; j <= MAX_ORDER; ++j) { > + pt = pool->caching[i].orders[j]; > + KUNIT_EXPECT_PTR_EQ(test, pt.pool, pool); > + KUNIT_EXPECT_EQ(test, pt.caching, i); > + KUNIT_EXPECT_EQ(test, pt.order, j); > + > + if (params->use_dma_alloc) { > + KUNIT_ASSERT_FALSE(test, > + list_empty(&pt.pages)); > + } That belongs more into the pools check I think, but not a blocker to have it here. I'm not familiar with some of the KUNIT stuff, but the TTM side looks good. Feel free to add Acked-by: Christian König . Christian. > + } > + } > + } > + > + ttm_device_fini(ttm_dev); > +} > + > static struct kunit_case ttm_device_test_cases[] = { > KUNIT_CASE(ttm_device_init_basic), > + KUNIT_CASE(ttm_device_init_multiple), > + KUNIT_CASE(ttm_device_fini_basic), > + KUNIT_CASE(ttm_device_init_no_vma_man), > + KUNIT_CASE_PARAM(ttm_device_init_pools, ttm_device_gen_params), > {} > }; >