// SPDX-License-Identifier: GPL-2.0/* * KUnit tests for OF APIs */#include <linux/ioport.h>#include <linux/module.h>#include <linux/of.h> #include <kunit/test.h> #include "of_private.h" /* * Test that the root node "/" can be found by path. */static void of_dtb_root_node_found_by_path(struct kunit *test){	struct device_node *np; 	np = of_find_node_by_path("/");	KUNIT_EXPECT_NOT_ERR_OR_NULL(test, np);	of_node_put(np);} /* * Test that the 'of_root' global variable is always populated when DT code is * enabled. Remove this test once of_root is removed from global access. */static void of_dtb_root_node_populates_of_root(struct kunit *test){	KUNIT_EXPECT_NOT_ERR_OR_NULL(test, of_root);} static struct kunit_case of_dtb_test_cases[] = {	KUNIT_CASE(of_dtb_root_node_found_by_path),	KUNIT_CASE(of_dtb_root_node_populates_of_root),	{}}; static int of_dtb_test_init(struct kunit *test){	of_root_kunit_skip(test);	if (!IS_ENABLED(CONFIG_OF_EARLY_FLATTREE))		kunit_skip(test, "requires CONFIG_OF_EARLY_FLATTREE"); 	return 0;} /* * Test suite to confirm a DTB is loaded. */static struct kunit_suite of_dtb_suite = {	.name = "of_dtb",	.test_cases = of_dtb_test_cases,	.init = of_dtb_test_init,}; struct of_address_resource_bounds_case {	u64 start;	u64 size;	int ret; 	u64 res_start;	u64 res_end;}; static void of_address_resource_bounds_case_desc(const struct of_address_resource_bounds_case *p,						 char *name){	snprintf(name, KUNIT_PARAM_DESC_SIZE, "start=0x%016llx,size=0x%016llx", p->start, p->size);} static const struct of_address_resource_bounds_case of_address_resource_bounds_cases[] = {	{		.start = 0,		.size = 0,		.ret = 0,		.res_start = 0,		.res_end = -1,	},	{		.start = 0,		.size = 0x1000,		.ret = 0,		.res_start = 0,		.res_end = 0xfff,	},	{		.start = 0x1000,		.size = 0,		.ret = 0,		.res_start = 0x1000,		.res_end = 0xfff,	},	{		.start = 0x1000,		.size = 0x1000,		.ret = 0,		.res_start = 0x1000,		.res_end = 0x1fff,	},	{		.start = 1,		.size = RESOURCE_SIZE_MAX,		.ret = 0,		.res_start = 1,		.res_end = RESOURCE_SIZE_MAX,	},	{		.start = RESOURCE_SIZE_MAX,		.size = 1,		.ret = 0,		.res_start = RESOURCE_SIZE_MAX,		.res_end = RESOURCE_SIZE_MAX,	},	{		.start = 2,		.size = RESOURCE_SIZE_MAX,		.ret = -EOVERFLOW,	},	{		.start = RESOURCE_SIZE_MAX,		.size = 2,		.ret = -EOVERFLOW,	},	{		.start = ULL(0x100000000),		.size = 1,		.ret = sizeof(resource_size_t) > sizeof(u32) ? 0 : -EOVERFLOW,		.res_start = ULL(0x100000000),		.res_end = ULL(0x100000000),	},	{		.start = 0x1000,		.size = 0xffffffff,		.ret = sizeof(resource_size_t) > sizeof(u32) ? 0 : -EOVERFLOW,		.res_start = 0x1000,		.res_end = ULL(0x100000ffe),	},}; KUNIT_ARRAY_PARAM(of_address_resource_bounds,		  of_address_resource_bounds_cases, of_address_resource_bounds_case_desc); static void of_address_resource_bounds(struct kunit *test){	const struct of_address_resource_bounds_case *param = test->param_value;	struct resource r; /* Intentionally uninitialized */	int ret; 	if (!IS_ENABLED(CONFIG_OF_ADDRESS))		kunit_skip(test, "CONFIG_OF_ADDRESS not enabled\n"); 	ret = __of_address_resource_bounds(&r, param->start, param->size);	KUNIT_EXPECT_EQ(test, param->ret, ret);	if (ret == 0) {		KUNIT_EXPECT_EQ(test, (resource_size_t)param->res_start, r.start);		KUNIT_EXPECT_EQ(test, (resource_size_t)param->res_end, r.end);		KUNIT_EXPECT_EQ(test, param->size, resource_size(&r));	}} static struct kunit_case of_address_test_cases[] = {	KUNIT_CASE_PARAM(of_address_resource_bounds, of_address_resource_bounds_gen_params),	{}}; static struct kunit_suite of_address_suite = {	.name = "of_address",	.test_cases = of_address_test_cases,}; kunit_test_suites(	&of_dtb_suite, &of_address_suite,);MODULE_DESCRIPTION("KUnit tests for OF APIs");MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");MODULE_LICENSE("GPL");