Commit 6e254613 authored by Michal Wajdeczko's avatar Michal Wajdeczko Committed by Rodrigo Vivi
Browse files

drm/xe/kunit: Add GuC Doorbells Manager tests 



Add few tests to make sure that basic usage scenarios of the GuC
Doorbells Manager are implemented correctly.

Cc: Piotr Piórkowski <piotr.piorkowski@intel.com>
Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20231218190629.502-11-michal.wajdeczko@intel.com


Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
parent 90ad6f30

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

0 → 100644
+201 −0
Original line number Diff line number Diff line 
// 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);



	mutex_lock(dbm_mutex(dbm));

	for (n = 0; n < *p; n++)

		KUNIT_EXPECT_GE(test, xe_guc_db_mgr_reserve_id_locked(dbm), 0);

	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);

		KUNIT_EXPECT_EQ(test, xe_guc_db_mgr_reserve_id_locked(dbm), n);

	}

	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_range_overlap(struct kunit *test)

{

	const unsigned int *p = test->param_value;

	struct xe_guc_db_mgr *dbm = test->priv;

	int id1, id2, id3;

	unsigned int n;



	KUNIT_ASSERT_EQ(test, xe_guc_db_mgr_init(dbm, ~0), 0);

	KUNIT_ASSERT_LE(test, *p, dbm->count);



	KUNIT_ASSERT_GE(test, id1 = xe_guc_db_mgr_reserve_range(dbm, *p, 0), 0);

	for (n = 0; n < dbm->count - *p; n++) {

		KUNIT_ASSERT_GE(test, id2 = xe_guc_db_mgr_reserve_range(dbm, 1, 0), 0);

		KUNIT_ASSERT_NE(test, id2, id1);

		KUNIT_ASSERT_NE_MSG(test, id2 < id1, id2 > id1 + *p - 1,

				    "id1=%d id2=%d", id1, id2);

	}

	KUNIT_ASSERT_LT(test, xe_guc_db_mgr_reserve_range(dbm, 1, 0), 0);

	xe_guc_db_mgr_release_range(dbm, 0, dbm->count);



	if (*p >= 1) {

		KUNIT_ASSERT_GE(test, id1 = xe_guc_db_mgr_reserve_range(dbm, 1, 0), 0);

		KUNIT_ASSERT_GE(test, id2 = xe_guc_db_mgr_reserve_range(dbm, *p - 1, 0), 0);

		KUNIT_ASSERT_NE(test, id2, id1);

		KUNIT_ASSERT_NE_MSG(test, id1 < id2, id1 > id2 + *p - 2,

				    "id1=%d id2=%d", id1, id2);

		for (n = 0; n < dbm->count - *p; n++) {

			KUNIT_ASSERT_GE(test, id3 = xe_guc_db_mgr_reserve_range(dbm, 1, 0), 0);

			KUNIT_ASSERT_NE(test, id3, id1);

			KUNIT_ASSERT_NE(test, id3, id2);

			KUNIT_ASSERT_NE_MSG(test, id3 < id2, id3 > id2 + *p - 2,

					    "id3=%d id2=%d", id3, id2);

		}

		KUNIT_ASSERT_LT(test, xe_guc_db_mgr_reserve_range(dbm, 1, 0), 0);

		xe_guc_db_mgr_release_range(dbm, 0, dbm->count);

	}

}



static void test_range_compact(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, ~0), 0);

	KUNIT_ASSERT_NE(test, *p, 0);

	KUNIT_ASSERT_LE(test, *p, dbm->count);

	if (dbm->count % *p)

		kunit_skip(test, "must be divisible");



	KUNIT_ASSERT_GE(test, xe_guc_db_mgr_reserve_range(dbm, *p, 0), 0);

	for (n = 1; n < dbm->count / *p; n++)

		KUNIT_ASSERT_GE(test, xe_guc_db_mgr_reserve_range(dbm, *p, 0), 0);

	KUNIT_ASSERT_LT(test, xe_guc_db_mgr_reserve_range(dbm, 1, 0), 0);

	xe_guc_db_mgr_release_range(dbm, 0, dbm->count);

}



static void test_range_spare(struct kunit *test)

{

	const unsigned int *p = test->param_value;

	struct xe_guc_db_mgr *dbm = test->priv;

	int id;



	KUNIT_ASSERT_EQ(test, xe_guc_db_mgr_init(dbm, ~0), 0);

	KUNIT_ASSERT_LE(test, *p, dbm->count);



	KUNIT_ASSERT_LT(test, xe_guc_db_mgr_reserve_range(dbm, *p, dbm->count), 0);

	KUNIT_ASSERT_LT(test, xe_guc_db_mgr_reserve_range(dbm, *p, dbm->count - *p + 1), 0);

	KUNIT_ASSERT_EQ(test, id = xe_guc_db_mgr_reserve_range(dbm, *p, dbm->count - *p), 0);

	KUNIT_ASSERT_LT(test, xe_guc_db_mgr_reserve_range(dbm, 1, dbm->count - *p), 0);

	xe_guc_db_mgr_release_range(dbm, id, *p);

}



static struct kunit_case guc_dbm_test_cases[] = {

	KUNIT_CASE(test_empty),

	KUNIT_CASE(test_default),

	KUNIT_CASE_PARAM(test_size, guc_dbm_gen_params),

	KUNIT_CASE_PARAM(test_reuse, guc_dbm_gen_params),

	KUNIT_CASE_PARAM(test_range_overlap, guc_dbm_gen_params),

	KUNIT_CASE_PARAM(test_range_compact, guc_dbm_gen_params),

	KUNIT_CASE_PARAM(test_range_spare, guc_dbm_gen_params),

	{}

};



static struct kunit_suite guc_dbm_suite = {

	.name = "guc_dbm",

	.test_cases = guc_dbm_test_cases,

	.init = guc_dbm_test_init,

};



kunit_test_suites(&guc_dbm_suite);

drivers/gpu/drm/xe/xe_guc_db_mgr.c

+4 −0
Original line number Diff line number Diff line
@@ -255,3 +255,7 @@ void xe_guc_db_mgr_print(struct xe_guc_db_mgr *dbm, 


	mutex_unlock(dbm_mutex(dbm));

}



#if IS_BUILTIN(CONFIG_DRM_XE_KUNIT_TEST)

#include "tests/xe_guc_db_mgr_test.c"

#endif