drivers/gpu/drm/xe/tests/xe_guc_db_mgr_test.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/xe/tests/xe_guc_db_mgr_test.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/xe/tests/xe_guc_db_mgr_test.c
Extension
.c
Size
6041 bytes
Lines
202
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0 AND MIT
/*
 * Copyright © 2023 Intel Corporation
 */

#include <kunit/test.h>

#include "xe_device.h"
#include "xe_kunit_helpers.h"

static int guc_dbm_test_init(struct kunit *test)
{
	struct xe_guc_db_mgr *dbm;

	xe_kunit_helper_xe_device_test_init(test);
	dbm = &xe_device_get_gt(test->priv, 0)->uc.guc.dbm;

	mutex_init(dbm_mutex(dbm));
	test->priv = dbm;
	return 0;
}

static void test_empty(struct kunit *test)
{
	struct xe_guc_db_mgr *dbm = test->priv;

	KUNIT_ASSERT_EQ(test, xe_guc_db_mgr_init(dbm, 0), 0);
	KUNIT_ASSERT_EQ(test, dbm->count, 0);

	mutex_lock(dbm_mutex(dbm));
	KUNIT_EXPECT_LT(test, xe_guc_db_mgr_reserve_id_locked(dbm), 0);
	mutex_unlock(dbm_mutex(dbm));

	KUNIT_EXPECT_LT(test, xe_guc_db_mgr_reserve_range(dbm, 1, 0), 0);
}

static void test_default(struct kunit *test)
{
	struct xe_guc_db_mgr *dbm = test->priv;

	KUNIT_ASSERT_EQ(test, xe_guc_db_mgr_init(dbm, ~0), 0);
	KUNIT_ASSERT_EQ(test, dbm->count, GUC_NUM_DOORBELLS);
}

static const unsigned int guc_dbm_params[] = {
	GUC_NUM_DOORBELLS / 64,
	GUC_NUM_DOORBELLS / 32,
	GUC_NUM_DOORBELLS / 8,
	GUC_NUM_DOORBELLS,
};

static void uint_param_get_desc(const unsigned int *p, char *desc)
{
	snprintf(desc, KUNIT_PARAM_DESC_SIZE, "%u", *p);
}

KUNIT_ARRAY_PARAM(guc_dbm, guc_dbm_params, uint_param_get_desc);

static void test_size(struct kunit *test)
{
	const unsigned int *p = test->param_value;
	struct xe_guc_db_mgr *dbm = test->priv;
	unsigned int n;
	int id;

	KUNIT_ASSERT_EQ(test, xe_guc_db_mgr_init(dbm, *p), 0);
	KUNIT_ASSERT_EQ(test, dbm->count, *p);

	mutex_lock(dbm_mutex(dbm));
	for (n = 0; n < *p; n++) {
		KUNIT_EXPECT_GE(test, id = xe_guc_db_mgr_reserve_id_locked(dbm), 0);
		KUNIT_EXPECT_LT(test, id, dbm->count);
	}
	KUNIT_EXPECT_LT(test, xe_guc_db_mgr_reserve_id_locked(dbm), 0);
	mutex_unlock(dbm_mutex(dbm));

	mutex_lock(dbm_mutex(dbm));
	for (n = 0; n < *p; n++)
		xe_guc_db_mgr_release_id_locked(dbm, n);
	mutex_unlock(dbm_mutex(dbm));
}

static void test_reuse(struct kunit *test)
{
	const unsigned int *p = test->param_value;
	struct xe_guc_db_mgr *dbm = test->priv;
	unsigned int n;

	KUNIT_ASSERT_EQ(test, xe_guc_db_mgr_init(dbm, *p), 0);

Annotation

Implementation Notes