[PATCH v7 1/8] drm/ttm/tests: Add tests for ttm_resource and ttm_sys_man
Karolina Stolarek
karolina.stolarek at intel.com
Fri Nov 17 08:49:36 UTC 2023
Test initialization of ttm_resource using different memory domains.
Add tests for a system memory manager and functions that can be
tested without a fully-featured resource manager. Update
ttm_bo_kunit_init() to initialize BO's kref and a genuine GEM drm
object. Export ttm_resource_alloc for test purposes only.
Signed-off-by: Karolina Stolarek <karolina.stolarek at intel.com>
Tested-by: Amaranath Somalapuram <Amaranath.Somalapuram at amd.com>
---
drivers/gpu/drm/ttm/tests/Makefile | 1 +
drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c | 22 +-
drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h | 3 +
drivers/gpu/drm/ttm/tests/ttm_resource_test.c | 335 ++++++++++++++++++
drivers/gpu/drm/ttm/ttm_resource.c | 3 +
5 files changed, 363 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/ttm/tests/ttm_resource_test.c
diff --git a/drivers/gpu/drm/ttm/tests/Makefile b/drivers/gpu/drm/ttm/tests/Makefile
index ec87c4fc1ad5..c92fe2052ef6 100644
--- a/drivers/gpu/drm/ttm/tests/Makefile
+++ b/drivers/gpu/drm/ttm/tests/Makefile
@@ -3,4 +3,5 @@
obj-$(CONFIG_DRM_TTM_KUNIT_TEST) += \
ttm_device_test.o \
ttm_pool_test.o \
+ ttm_resource_test.o \
ttm_kunit_helpers.o
diff --git a/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c
index 81661d8827aa..779fbc038f17 100644
--- a/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c
+++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c
@@ -29,19 +29,39 @@ struct ttm_buffer_object *ttm_bo_kunit_init(struct kunit *test,
struct ttm_test_devices *devs,
size_t size)
{
- struct drm_gem_object gem_obj = { .size = size };
+ struct drm_gem_object gem_obj = { };
struct ttm_buffer_object *bo;
+ int err;
bo = kunit_kzalloc(test, sizeof(*bo), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, bo);
bo->base = gem_obj;
+ err = drm_gem_object_init(devs->drm, &bo->base, size);
+ KUNIT_ASSERT_EQ(test, err, 0);
+
bo->bdev = devs->ttm_dev;
+ kref_init(&bo->kref);
return bo;
}
EXPORT_SYMBOL_GPL(ttm_bo_kunit_init);
+struct ttm_place *ttm_place_kunit_init(struct kunit *test,
+ uint32_t mem_type, uint32_t flags)
+{
+ struct ttm_place *place;
+
+ place = kunit_kzalloc(test, sizeof(*place), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, place);
+
+ place->mem_type = mem_type;
+ place->flags = flags;
+
+ return place;
+}
+EXPORT_SYMBOL_GPL(ttm_place_kunit_init);
+
struct ttm_test_devices *ttm_test_devices_basic(struct kunit *test)
{
struct ttm_test_devices *devs;
diff --git a/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h
index e261e3660d0b..2f51c833a536 100644
--- a/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h
+++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h
@@ -8,6 +8,7 @@
#include <drm/drm_drv.h>
#include <drm/ttm/ttm_device.h>
#include <drm/ttm/ttm_bo.h>
+#include <drm/ttm/ttm_placement.h>
#include <drm/drm_kunit_helpers.h>
#include <kunit/test.h>
@@ -28,6 +29,8 @@ int ttm_device_kunit_init(struct ttm_test_devices *priv,
struct ttm_buffer_object *ttm_bo_kunit_init(struct kunit *test,
struct ttm_test_devices *devs,
size_t size);
+struct ttm_place *ttm_place_kunit_init(struct kunit *test,
+ uint32_t mem_type, uint32_t flags);
struct ttm_test_devices *ttm_test_devices_basic(struct kunit *test);
struct ttm_test_devices *ttm_test_devices_all(struct kunit *test);
diff --git a/drivers/gpu/drm/ttm/tests/ttm_resource_test.c b/drivers/gpu/drm/ttm/tests/ttm_resource_test.c
new file mode 100644
index 000000000000..029e1f094bb0
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/ttm_resource_test.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0 AND MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+#include <drm/ttm/ttm_resource.h>
+
+#include "ttm_kunit_helpers.h"
+
+#define RES_SIZE SZ_4K
+#define TTM_PRIV_DUMMY_REG (TTM_NUM_MEM_TYPES - 1)
+
+struct ttm_resource_test_case {
+ const char *description;
+ uint32_t mem_type;
+ uint32_t flags;
+};
+
+struct ttm_resource_test_priv {
+ struct ttm_test_devices *devs;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+};
+
+static const struct ttm_resource_manager_func ttm_resource_manager_mock_funcs = { };
+
+static int ttm_resource_test_init(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv;
+
+ priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, priv);
+
+ priv->devs = ttm_test_devices_all(test);
+ KUNIT_ASSERT_NOT_NULL(test, priv->devs);
+
+ test->priv = priv;
+
+ return 0;
+}
+
+static void ttm_resource_test_fini(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+
+ ttm_test_devices_put(test, priv->devs);
+}
+
+static void ttm_init_test_mocks(struct kunit *test,
+ struct ttm_resource_test_priv *priv,
+ uint32_t mem_type, uint32_t flags)
+{
+ size_t size = RES_SIZE;
+
+ /* Make sure we have what we need for a good BO mock */
+ KUNIT_ASSERT_NOT_NULL(test, priv->devs->ttm_dev);
+
+ priv->bo = ttm_bo_kunit_init(test, priv->devs, size);
+ priv->place = ttm_place_kunit_init(test, mem_type, flags);
+}
+
+static void ttm_init_test_manager(struct kunit *test,
+ struct ttm_resource_test_priv *priv,
+ uint32_t mem_type)
+{
+ struct ttm_device *ttm_dev = priv->devs->ttm_dev;
+ struct ttm_resource_manager *man;
+ size_t size = SZ_16K;
+
+ man = kunit_kzalloc(test, sizeof(*man), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, man);
+
+ man->use_tt = false;
+ man->func = &ttm_resource_manager_mock_funcs;
+
+ ttm_resource_manager_init(man, ttm_dev, size);
+ ttm_set_driver_manager(ttm_dev, mem_type, man);
+ ttm_resource_manager_set_used(man, true);
+}
+
+static const struct ttm_resource_test_case ttm_resource_cases[] = {
+ {
+ .description = "Init resource in TTM_PL_SYSTEM",
+ .mem_type = TTM_PL_SYSTEM,
+ },
+ {
+ .description = "Init resource in TTM_PL_VRAM",
+ .mem_type = TTM_PL_VRAM,
+ },
+ {
+ .description = "Init resource in a private placement",
+ .mem_type = TTM_PRIV_DUMMY_REG,
+ },
+ {
+ .description = "Init resource in TTM_PL_SYSTEM, set placement flags",
+ .mem_type = TTM_PL_SYSTEM,
+ .flags = TTM_PL_FLAG_TOPDOWN,
+ },
+};
+
+static void ttm_resource_case_desc(const struct ttm_resource_test_case *t, char *desc)
+{
+ strscpy(desc, t->description, KUNIT_PARAM_DESC_SIZE);
+}
+
+KUNIT_ARRAY_PARAM(ttm_resource, ttm_resource_cases, ttm_resource_case_desc);
+
+static void ttm_resource_init_basic(struct kunit *test)
+{
+ const struct ttm_resource_test_case *params = test->param_value;
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource *res;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ struct ttm_resource_manager *man;
+ uint64_t expected_usage;
+
+ ttm_init_test_mocks(test, priv, params->mem_type, params->flags);
+ bo = priv->bo;
+ place = priv->place;
+
+ if (params->mem_type > TTM_PL_SYSTEM)
+ ttm_init_test_manager(test, priv, params->mem_type);
+
+ res = kunit_kzalloc(test, sizeof(*res), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, res);
+
+ man = ttm_manager_type(priv->devs->ttm_dev, place->mem_type);
+ expected_usage = man->usage + RES_SIZE;
+
+ KUNIT_ASSERT_TRUE(test, list_empty(&man->lru[bo->priority]));
+
+ ttm_resource_init(bo, place, res);
+
+ KUNIT_ASSERT_EQ(test, res->start, 0);
+ KUNIT_ASSERT_EQ(test, res->size, RES_SIZE);
+ KUNIT_ASSERT_EQ(test, res->mem_type, place->mem_type);
+ KUNIT_ASSERT_EQ(test, res->placement, place->flags);
+ KUNIT_ASSERT_PTR_EQ(test, res->bo, bo);
+
+ KUNIT_ASSERT_NULL(test, res->bus.addr);
+ KUNIT_ASSERT_EQ(test, res->bus.offset, 0);
+ KUNIT_ASSERT_FALSE(test, res->bus.is_iomem);
+ KUNIT_ASSERT_EQ(test, res->bus.caching, ttm_cached);
+ KUNIT_ASSERT_EQ(test, man->usage, expected_usage);
+
+ KUNIT_ASSERT_TRUE(test, list_is_singular(&man->lru[bo->priority]));
+
+ ttm_resource_fini(man, res);
+}
+
+static void ttm_resource_init_pinned(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource *res;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ struct ttm_resource_manager *man;
+
+ ttm_init_test_mocks(test, priv, TTM_PL_SYSTEM, 0);
+ bo = priv->bo;
+ place = priv->place;
+
+ man = ttm_manager_type(priv->devs->ttm_dev, place->mem_type);
+
+ res = kunit_kzalloc(test, sizeof(*res), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, res);
+ KUNIT_ASSERT_TRUE(test, list_empty(&bo->bdev->pinned));
+
+ dma_resv_lock(bo->base.resv, NULL);
+ ttm_bo_pin(bo);
+ ttm_resource_init(bo, place, res);
+ KUNIT_ASSERT_TRUE(test, list_is_singular(&bo->bdev->pinned));
+
+ ttm_bo_unpin(bo);
+ ttm_resource_fini(man, res);
+ dma_resv_unlock(bo->base.resv);
+
+ KUNIT_ASSERT_TRUE(test, list_empty(&bo->bdev->pinned));
+}
+
+static void ttm_resource_fini_basic(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource *res;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ struct ttm_resource_manager *man;
+
+ ttm_init_test_mocks(test, priv, TTM_PL_SYSTEM, 0);
+ bo = priv->bo;
+ place = priv->place;
+
+ man = ttm_manager_type(priv->devs->ttm_dev, place->mem_type);
+
+ res = kunit_kzalloc(test, sizeof(*res), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, res);
+
+ ttm_resource_init(bo, place, res);
+ ttm_resource_fini(man, res);
+
+ KUNIT_ASSERT_TRUE(test, list_empty(&res->lru));
+ KUNIT_ASSERT_EQ(test, man->usage, 0);
+}
+
+static void ttm_resource_manager_init_basic(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource_manager *man;
+ size_t size = SZ_16K;
+
+ man = kunit_kzalloc(test, sizeof(*man), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, man);
+
+ ttm_resource_manager_init(man, priv->devs->ttm_dev, size);
+
+ KUNIT_ASSERT_PTR_EQ(test, man->bdev, priv->devs->ttm_dev);
+ KUNIT_ASSERT_EQ(test, man->size, size);
+ KUNIT_ASSERT_EQ(test, man->usage, 0);
+ KUNIT_ASSERT_NULL(test, man->move);
+ KUNIT_ASSERT_NOT_NULL(test, &man->move_lock);
+
+ for (int i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
+ KUNIT_ASSERT_TRUE(test, list_empty(&man->lru[i]));
+}
+
+static void ttm_resource_manager_usage_basic(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource *res;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ struct ttm_resource_manager *man;
+ uint64_t actual_usage;
+
+ ttm_init_test_mocks(test, priv, TTM_PL_SYSTEM, TTM_PL_FLAG_TOPDOWN);
+ bo = priv->bo;
+ place = priv->place;
+
+ res = kunit_kzalloc(test, sizeof(*res), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, res);
+
+ man = ttm_manager_type(priv->devs->ttm_dev, place->mem_type);
+
+ ttm_resource_init(bo, place, res);
+ actual_usage = ttm_resource_manager_usage(man);
+
+ KUNIT_ASSERT_EQ(test, actual_usage, RES_SIZE);
+
+ ttm_resource_fini(man, res);
+}
+
+static void ttm_resource_manager_set_used_basic(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource_manager *man;
+
+ man = ttm_manager_type(priv->devs->ttm_dev, TTM_PL_SYSTEM);
+ KUNIT_ASSERT_TRUE(test, man->use_type);
+
+ ttm_resource_manager_set_used(man, false);
+ KUNIT_ASSERT_FALSE(test, man->use_type);
+}
+
+static void ttm_sys_man_alloc_basic(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource_manager *man;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ struct ttm_resource *res;
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ int ret;
+
+ ttm_init_test_mocks(test, priv, mem_type, 0);
+ bo = priv->bo;
+ place = priv->place;
+
+ man = ttm_manager_type(priv->devs->ttm_dev, mem_type);
+ ret = man->func->alloc(man, bo, place, &res);
+
+ KUNIT_ASSERT_EQ(test, ret, 0);
+ KUNIT_ASSERT_EQ(test, res->size, RES_SIZE);
+ KUNIT_ASSERT_EQ(test, res->mem_type, mem_type);
+ KUNIT_ASSERT_PTR_EQ(test, res->bo, bo);
+
+ ttm_resource_fini(man, res);
+}
+
+static void ttm_sys_man_free_basic(struct kunit *test)
+{
+ struct ttm_resource_test_priv *priv = test->priv;
+ struct ttm_resource_manager *man;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ struct ttm_resource *res;
+ uint32_t mem_type = TTM_PL_SYSTEM;
+
+ ttm_init_test_mocks(test, priv, mem_type, 0);
+ bo = priv->bo;
+ place = priv->place;
+
+ res = kunit_kzalloc(test, sizeof(*res), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, res);
+
+ ttm_resource_alloc(bo, place, &res);
+
+ man = ttm_manager_type(priv->devs->ttm_dev, mem_type);
+ man->func->free(man, res);
+
+ KUNIT_ASSERT_TRUE(test, list_empty(&man->lru[bo->priority]));
+ KUNIT_ASSERT_EQ(test, man->usage, 0);
+}
+
+static struct kunit_case ttm_resource_test_cases[] = {
+ KUNIT_CASE_PARAM(ttm_resource_init_basic, ttm_resource_gen_params),
+ KUNIT_CASE(ttm_resource_init_pinned),
+ KUNIT_CASE(ttm_resource_fini_basic),
+ KUNIT_CASE(ttm_resource_manager_init_basic),
+ KUNIT_CASE(ttm_resource_manager_usage_basic),
+ KUNIT_CASE(ttm_resource_manager_set_used_basic),
+ KUNIT_CASE(ttm_sys_man_alloc_basic),
+ KUNIT_CASE(ttm_sys_man_free_basic),
+ {}
+};
+
+static struct kunit_suite ttm_resource_test_suite = {
+ .name = "ttm_resource",
+ .init = ttm_resource_test_init,
+ .exit = ttm_resource_test_fini,
+ .test_cases = ttm_resource_test_cases,
+};
+
+kunit_test_suites(&ttm_resource_test_suite);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
index 46ff9c75bb12..02b96d23fdb9 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -30,6 +30,8 @@
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_resource.h>
+#include <drm/drm_util.h>
+
/**
* ttm_lru_bulk_move_init - initialize a bulk move structure
* @bulk: the structure to init
@@ -240,6 +242,7 @@ int ttm_resource_alloc(struct ttm_buffer_object *bo,
spin_unlock(&bo->bdev->lru_lock);
return 0;
}
+EXPORT_SYMBOL_FOR_TESTS_ONLY(ttm_resource_alloc);
void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res)
{
--
2.25.1
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