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// 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, NULL);
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");
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