Test initialization and cleanup of the ttm_device struct, including
some error paths. Verify the creation of page pools if use_dma_alloc
param is true.
Signed-off-by: Karolina Stolarek <karolina.stolarek@xxxxxxxxx>
---
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));
+ }
