lib/efi_selftest/efi_selftest_devicepath.c - u-boot-mtk - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * efi_selftest_devicepath
  *
  * Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
  *
  * This unit test checks the following protocol services:
  * DevicePathToText
  */

 #include <efi_selftest.h>

 static struct efi_boot_services *boottime;

 static efi_handle_t handle1;
 static efi_handle_t handle2;
 static efi_handle_t handle3;

 struct interface {
 	void (EFIAPI * inc)(void);
 } interface;

 static efi_guid_t guid_device_path = EFI_DEVICE_PATH_PROTOCOL_GUID;

 static efi_guid_t guid_device_path_to_text_protocol =
 	EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;

 static efi_guid_t guid_protocol =
 	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
 		 0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0x7d);

 static efi_guid_t guid_vendor1 =
 	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
 		 0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0xb1);

 static efi_guid_t guid_vendor2 =
 	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
 		 0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0xa2);

 static efi_guid_t guid_vendor3 =
 	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
 		 0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0xc3);

 static u8 *dp1;
 static u8 *dp2;
 static u8 *dp3;

 struct efi_device_path_to_text_protocol *device_path_to_text;

 /*
  * Setup unit test.
  *
  * Create three handles. Install a new protocol on two of them and
  * provide device paths.
  *
  * handle1
  *   guid interface
  * handle2
  *   guid interface
  * handle3
  *
  * @handle:	handle of the loaded image
  * @systable:	system table
  */
 static int setup(const efi_handle_t img_handle,
 		 const struct efi_system_table *systable)
 {
 	struct efi_device_path_vendor vendor_node;
 	struct efi_device_path end_node;
 	efi_status_t ret;

 	boottime = systable->boottime;

 	ret = boottime->locate_protocol(&guid_device_path_to_text_protocol,
 					NULL, (void **)&device_path_to_text);
 	if (ret != EFI_SUCCESS) {
 		device_path_to_text = NULL;
 		efi_st_error(
 			"Device path to text protocol is not available.\n");
 		return EFI_ST_FAILURE;
 	}

 	ret = boottime->allocate_pool(EFI_LOADER_DATA,
 				      sizeof(struct efi_device_path_vendor) +
 				      sizeof(struct efi_device_path),
 				      (void **)&dp1);
 	if (ret != EFI_SUCCESS)
 		goto out_of_memory;

 	ret = boottime->allocate_pool(EFI_LOADER_DATA, 2 *
 				      sizeof(struct efi_device_path_vendor) +
 				      sizeof(struct efi_device_path),
 				      (void **)&dp2);
 	if (ret != EFI_SUCCESS)
 		goto out_of_memory;

 	ret = boottime->allocate_pool(EFI_LOADER_DATA, 3 *
 				      sizeof(struct efi_device_path_vendor) +
 				      sizeof(struct efi_device_path),
 				      (void **)&dp3);
 	if (ret != EFI_SUCCESS)
 		goto out_of_memory;

 	vendor_node.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
 	vendor_node.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
 	vendor_node.dp.length = sizeof(struct efi_device_path_vendor);

 	boottime->copy_mem(&vendor_node.guid, &guid_vendor1,
 			   sizeof(efi_guid_t));
 	boottime->copy_mem(dp1, &vendor_node,
 			   sizeof(struct efi_device_path_vendor));
 	boottime->copy_mem(dp2, &vendor_node,
 			   sizeof(struct efi_device_path_vendor));
 	boottime->copy_mem(dp3, &vendor_node,
 			   sizeof(struct efi_device_path_vendor));

 	boottime->copy_mem(&vendor_node.guid, &guid_vendor2,
 			   sizeof(efi_guid_t));
 	boottime->copy_mem(dp2 + sizeof(struct efi_device_path_vendor),
 			   &vendor_node, sizeof(struct efi_device_path_vendor));
 	boottime->copy_mem(dp3 + sizeof(struct efi_device_path_vendor),
 			   &vendor_node, sizeof(struct efi_device_path_vendor));

 	boottime->copy_mem(&vendor_node.guid, &guid_vendor3,
 			   sizeof(efi_guid_t));
 	boottime->copy_mem(dp3 + 2 * sizeof(struct efi_device_path_vendor),
 			   &vendor_node, sizeof(struct efi_device_path_vendor));

 	end_node.type = DEVICE_PATH_TYPE_END;
 	end_node.sub_type = DEVICE_PATH_SUB_TYPE_END;
 	end_node.length = sizeof(struct efi_device_path);
 	boottime->copy_mem(dp1 + sizeof(struct efi_device_path_vendor),
 			   &end_node, sizeof(struct efi_device_path));
 	boottime->copy_mem(dp2 + 2 * sizeof(struct efi_device_path_vendor),
 			   &end_node, sizeof(struct efi_device_path));
 	boottime->copy_mem(dp3 + 3 * sizeof(struct efi_device_path_vendor),
 			   &end_node, sizeof(struct efi_device_path));

 	ret = boottime->install_protocol_interface(&handle1,
 						   &guid_device_path,
 						   EFI_NATIVE_INTERFACE,
 						   dp1);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("InstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->install_protocol_interface(&handle1,
 						   &guid_protocol,
 						   EFI_NATIVE_INTERFACE,
 						   &interface);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("InstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->install_protocol_interface(&handle2,
 						   &guid_device_path,
 						   EFI_NATIVE_INTERFACE,
 						   dp2);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("InstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->install_protocol_interface(&handle2,
 						   &guid_protocol,
 						   EFI_NATIVE_INTERFACE,
 						   &interface);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("InstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->install_protocol_interface(&handle3,
 						   &guid_device_path,
 						   EFI_NATIVE_INTERFACE,
 						   dp3);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("InstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	return EFI_ST_SUCCESS;

 out_of_memory:
 	efi_st_error("Out of memory\n");
 	return EFI_ST_FAILURE;
 }

 /*
  * Tear down unit test.
  *
  */
 static int teardown(void)
 {
 	efi_status_t ret;

 	ret = boottime->uninstall_protocol_interface(handle1,
 						     &guid_device_path,
 						     dp1);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("UninstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->uninstall_protocol_interface(handle1,
 						     &guid_protocol,
 						     &interface);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("UninstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->uninstall_protocol_interface(handle2,
 						     &guid_device_path,
 						     dp2);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("UninstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->uninstall_protocol_interface(handle2,
 						     &guid_protocol,
 						     &interface);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("UninstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->uninstall_protocol_interface(handle3,
 						     &guid_device_path,
 						     dp3);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("UninstallProtocolInterface failed\n");
 		return EFI_ST_FAILURE;
 	}
 	if (dp1) {
 		ret = boottime->free_pool(dp1);
 		if (ret != EFI_SUCCESS) {
 			efi_st_error("FreePool failed\n");
 			return EFI_ST_FAILURE;
 		}
 	}
 	if (dp2) {
 		ret = boottime->free_pool(dp2);
 		if (ret != EFI_SUCCESS) {
 			efi_st_error("FreePool failed\n");
 			return EFI_ST_FAILURE;
 		}
 	}
 	if (dp3) {
 		ret = boottime->free_pool(dp3);
 		if (ret != EFI_SUCCESS) {
 			efi_st_error("FreePool failed\n");
 			return EFI_ST_FAILURE;
 		}
 	}
 	return EFI_ST_SUCCESS;
 }

 /*
  * Execute unit test.
  *
  */
 static int execute(void)
 {
 	struct efi_device_path *remaining_dp;
 	efi_handle_t handle;
 	/*
 	 * This device path node ends with the letter 't' of 'u-boot'.
 	 * The following '.bin' does not belong to the node but is
 	 * helps to test the correct truncation.
 	 */
 	struct {
 		struct efi_device_path dp;
 		u16 text[12];
 	} __packed dp_node = {
 			{ DEVICE_PATH_TYPE_MEDIA_DEVICE,
 			  DEVICE_PATH_SUB_TYPE_FILE_PATH,
 			  sizeof(struct efi_device_path) + 12},
 			L"u-boot.bin",
 		};
 	u16 *string;
 	efi_status_t ret;
 	efi_uintn_t i, no_handles;
 	efi_handle_t *handles;
 	struct efi_device_path *dp;

 	/* Display all available device paths */
 	ret = boottime->locate_handle_buffer(BY_PROTOCOL,
 					     &guid_device_path,
 					     NULL, &no_handles, &handles);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("Cannot retrieve device path protocols.\n");
 		return EFI_ST_FAILURE;
 	}

 	efi_st_printf("Installed device path protocols:\n");
 	for (i = 0; i < no_handles; ++i) {
 		ret = boottime->open_protocol(handles[i], &guid_device_path,
 					      (void **)&dp, NULL, NULL,
 					      EFI_OPEN_PROTOCOL_GET_PROTOCOL);
 		if (ret != EFI_SUCCESS) {
 			efi_st_error("Cannot open device path protocol.\n");
 			return EFI_ST_FAILURE;
 		}
 		string = device_path_to_text->convert_device_path_to_text(
 					dp, true, false);
 		if (!string) {
 			efi_st_error("ConvertDevicePathToText failed\n");
 			return EFI_ST_FAILURE;
 		}
 		efi_st_printf("%ps\n", string);
 		ret = boottime->free_pool(string);
 		if (ret != EFI_SUCCESS) {
 			efi_st_error("FreePool failed\n");
 			return EFI_ST_FAILURE;
 		}
 		/*
 		 * CloseProtocol cannot be called without agent handle.
 		 * There is no need to close the device path protocol.
 		 */
 	}
 	ret = boottime->free_pool(handles);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("FreePool failed\n");
 		return EFI_ST_FAILURE;
 	}

 	/* Test ConvertDevicePathToText */
 	string = device_path_to_text->convert_device_path_to_text(
 			(struct efi_device_path *)dp2, true, false);
 	if (!string) {
 		efi_st_error("ConvertDevicePathToText failed\n");
 		return EFI_ST_FAILURE;
 	}
 	if (efi_st_strcmp_16_8(
 		string,
 		"/VenHw(dbca4c98-6cb0-694d-0872-819c650cbbb1)/VenHw(dbca4c98-6cb0-694d-0872-819c650cbba2)")
 	    ) {
 		efi_st_printf("dp2: %ps\n", string);
 		efi_st_error("Incorrect text from ConvertDevicePathToText\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->free_pool(string);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("FreePool failed\n");
 		return EFI_ST_FAILURE;
 	}

 	/* Test ConvertDeviceNodeToText */
 	string = device_path_to_text->convert_device_node_to_text(
 			(struct efi_device_path *)&dp_node, true, false);
 	if (!string) {
 		efi_st_error("ConvertDeviceNodeToText failed\n");
 		return EFI_ST_FAILURE;
 	}
 	if (efi_st_strcmp_16_8(string, "u-boot")) {
 		efi_st_printf("dp_node: %ps\n", string);
 		efi_st_error(
 			"Incorrect conversion by ConvertDeviceNodeToText\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->free_pool(string);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("FreePool failed\n");
 		return EFI_ST_FAILURE;
 	}

 	/* Test LocateDevicePath */
 	remaining_dp = (struct efi_device_path *)dp3;
 	ret = boottime->locate_device_path(&guid_protocol, &remaining_dp,
 					   &handle);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("LocateDevicePath failed\n");
 		return EFI_ST_FAILURE;
 	}
 	if (handle != handle2) {
 		efi_st_error("LocateDevicePath returned wrong handle\n");
 		return EFI_ST_FAILURE;
 	}
 	string = device_path_to_text->convert_device_path_to_text(remaining_dp,
 								  true, false);
 	if (!string) {
 		efi_st_error("ConvertDevicePathToText failed\n");
 		return EFI_ST_FAILURE;
 	}
 	if (efi_st_strcmp_16_8(string,
 			       "/VenHw(dbca4c98-6cb0-694d-0872-819c650cbbc3)")
 	    ) {
 		efi_st_printf("remaining device path: %ps\n", string);
 		efi_st_error("LocateDevicePath: wrong remaining device path\n");
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->free_pool(string);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("FreePool failed\n");
 		return EFI_ST_FAILURE;
 	}

 	return EFI_ST_SUCCESS;
 }

 EFI_UNIT_TEST(devicepath) = {
 	.name = "device path",
 	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
 	.setup = setup,
 	.execute = execute,
 	.teardown = teardown,
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* efi_selftest_devicepath
	*
	* Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
	*
	* This unit test checks the following protocol services:
	* DevicePathToText
	*/

	#include <efi_selftest.h>

	static struct efi_boot_services *boottime;

	static efi_handle_t handle1;
	static efi_handle_t handle2;
	static efi_handle_t handle3;

	struct interface {
	void (EFIAPI * inc)(void);
	} interface;

	static efi_guid_t guid_device_path = EFI_DEVICE_PATH_PROTOCOL_GUID;

	static efi_guid_t guid_device_path_to_text_protocol =
	EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;

	static efi_guid_t guid_protocol =
	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
	0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0x7d);

	static efi_guid_t guid_vendor1 =
	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
	0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0xb1);

	static efi_guid_t guid_vendor2 =
	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
	0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0xa2);

	static efi_guid_t guid_vendor3 =
	EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
	0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xbb, 0xc3);

	static u8 *dp1;
	static u8 *dp2;
	static u8 *dp3;

	struct efi_device_path_to_text_protocol *device_path_to_text;

	/*
	* Setup unit test.
	*
	* Create three handles. Install a new protocol on two of them and
	* provide device paths.
	*
	* handle1
	* guid interface
	* handle2
	* guid interface
	* handle3
	*
	* @handle: handle of the loaded image
	* @systable: system table
	*/
	static int setup(const efi_handle_t img_handle,
	const struct efi_system_table *systable)
	{
	struct efi_device_path_vendor vendor_node;
	struct efi_device_path end_node;
	efi_status_t ret;

	boottime = systable->boottime;

	ret = boottime->locate_protocol(&guid_device_path_to_text_protocol,
	NULL, (void **)&device_path_to_text);
	if (ret != EFI_SUCCESS) {
	device_path_to_text = NULL;
	efi_st_error(
	"Device path to text protocol is not available.\n");
	return EFI_ST_FAILURE;
	}

	ret = boottime->allocate_pool(EFI_LOADER_DATA,
	sizeof(struct efi_device_path_vendor) +
	sizeof(struct efi_device_path),
	(void **)&dp1);
	if (ret != EFI_SUCCESS)
	goto out_of_memory;

	ret = boottime->allocate_pool(EFI_LOADER_DATA, 2 *
	sizeof(struct efi_device_path_vendor) +
	sizeof(struct efi_device_path),
	(void **)&dp2);
	if (ret != EFI_SUCCESS)
	goto out_of_memory;

	ret = boottime->allocate_pool(EFI_LOADER_DATA, 3 *
	sizeof(struct efi_device_path_vendor) +
	sizeof(struct efi_device_path),
	(void **)&dp3);
	if (ret != EFI_SUCCESS)
	goto out_of_memory;

	vendor_node.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
	vendor_node.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
	vendor_node.dp.length = sizeof(struct efi_device_path_vendor);

	boottime->copy_mem(&vendor_node.guid, &guid_vendor1,
	sizeof(efi_guid_t));
	boottime->copy_mem(dp1, &vendor_node,
	sizeof(struct efi_device_path_vendor));
	boottime->copy_mem(dp2, &vendor_node,
	sizeof(struct efi_device_path_vendor));
	boottime->copy_mem(dp3, &vendor_node,
	sizeof(struct efi_device_path_vendor));

	boottime->copy_mem(&vendor_node.guid, &guid_vendor2,
	sizeof(efi_guid_t));
	boottime->copy_mem(dp2 + sizeof(struct efi_device_path_vendor),
	&vendor_node, sizeof(struct efi_device_path_vendor));
	boottime->copy_mem(dp3 + sizeof(struct efi_device_path_vendor),
	&vendor_node, sizeof(struct efi_device_path_vendor));

	boottime->copy_mem(&vendor_node.guid, &guid_vendor3,
	sizeof(efi_guid_t));
	boottime->copy_mem(dp3 + 2 * sizeof(struct efi_device_path_vendor),
	&vendor_node, sizeof(struct efi_device_path_vendor));

	end_node.type = DEVICE_PATH_TYPE_END;
	end_node.sub_type = DEVICE_PATH_SUB_TYPE_END;
	end_node.length = sizeof(struct efi_device_path);
	boottime->copy_mem(dp1 + sizeof(struct efi_device_path_vendor),
	&end_node, sizeof(struct efi_device_path));
	boottime->copy_mem(dp2 + 2 * sizeof(struct efi_device_path_vendor),
	&end_node, sizeof(struct efi_device_path));
	boottime->copy_mem(dp3 + 3 * sizeof(struct efi_device_path_vendor),
	&end_node, sizeof(struct efi_device_path));

	ret = boottime->install_protocol_interface(&handle1,
	&guid_device_path,
	EFI_NATIVE_INTERFACE,
	dp1);
	if (ret != EFI_SUCCESS) {
	efi_st_error("InstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->install_protocol_interface(&handle1,
	&guid_protocol,
	EFI_NATIVE_INTERFACE,
	&interface);
	if (ret != EFI_SUCCESS) {
	efi_st_error("InstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->install_protocol_interface(&handle2,
	&guid_device_path,
	EFI_NATIVE_INTERFACE,
	dp2);
	if (ret != EFI_SUCCESS) {
	efi_st_error("InstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->install_protocol_interface(&handle2,
	&guid_protocol,
	EFI_NATIVE_INTERFACE,
	&interface);
	if (ret != EFI_SUCCESS) {
	efi_st_error("InstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->install_protocol_interface(&handle3,
	&guid_device_path,
	EFI_NATIVE_INTERFACE,
	dp3);
	if (ret != EFI_SUCCESS) {
	efi_st_error("InstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	return EFI_ST_SUCCESS;

	out_of_memory:
	efi_st_error("Out of memory\n");
	return EFI_ST_FAILURE;
	}

	/*
	* Tear down unit test.
	*
	*/
	static int teardown(void)
	{
	efi_status_t ret;

	ret = boottime->uninstall_protocol_interface(handle1,
	&guid_device_path,
	dp1);
	if (ret != EFI_SUCCESS) {
	efi_st_error("UninstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->uninstall_protocol_interface(handle1,
	&guid_protocol,
	&interface);
	if (ret != EFI_SUCCESS) {
	efi_st_error("UninstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->uninstall_protocol_interface(handle2,
	&guid_device_path,
	dp2);
	if (ret != EFI_SUCCESS) {
	efi_st_error("UninstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->uninstall_protocol_interface(handle2,
	&guid_protocol,
	&interface);
	if (ret != EFI_SUCCESS) {
	efi_st_error("UninstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->uninstall_protocol_interface(handle3,
	&guid_device_path,
	dp3);
	if (ret != EFI_SUCCESS) {
	efi_st_error("UninstallProtocolInterface failed\n");
	return EFI_ST_FAILURE;
	}
	if (dp1) {
	ret = boottime->free_pool(dp1);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}
	}
	if (dp2) {
	ret = boottime->free_pool(dp2);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}
	}
	if (dp3) {
	ret = boottime->free_pool(dp3);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}
	}
	return EFI_ST_SUCCESS;
	}

	/*
	* Execute unit test.
	*
	*/
	static int execute(void)
	{
	struct efi_device_path *remaining_dp;
	efi_handle_t handle;
	/*
	* This device path node ends with the letter 't' of 'u-boot'.
	* The following '.bin' does not belong to the node but is
	* helps to test the correct truncation.
	*/
	struct {
	struct efi_device_path dp;
	u16 text[12];
	} __packed dp_node = {
	{ DEVICE_PATH_TYPE_MEDIA_DEVICE,
	DEVICE_PATH_SUB_TYPE_FILE_PATH,
	sizeof(struct efi_device_path) + 12},
	L"u-boot.bin",
	};
	u16 *string;
	efi_status_t ret;
	efi_uintn_t i, no_handles;
	efi_handle_t *handles;
	struct efi_device_path *dp;

	/* Display all available device paths */
	ret = boottime->locate_handle_buffer(BY_PROTOCOL,
	&guid_device_path,
	NULL, &no_handles, &handles);
	if (ret != EFI_SUCCESS) {
	efi_st_error("Cannot retrieve device path protocols.\n");
	return EFI_ST_FAILURE;
	}

	efi_st_printf("Installed device path protocols:\n");
	for (i = 0; i < no_handles; ++i) {
	ret = boottime->open_protocol(handles[i], &guid_device_path,
	(void **)&dp, NULL, NULL,
	EFI_OPEN_PROTOCOL_GET_PROTOCOL);
	if (ret != EFI_SUCCESS) {
	efi_st_error("Cannot open device path protocol.\n");
	return EFI_ST_FAILURE;
	}
	string = device_path_to_text->convert_device_path_to_text(
	dp, true, false);
	if (!string) {
	efi_st_error("ConvertDevicePathToText failed\n");
	return EFI_ST_FAILURE;
	}
	efi_st_printf("%ps\n", string);
	ret = boottime->free_pool(string);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}
	/*
	* CloseProtocol cannot be called without agent handle.
	* There is no need to close the device path protocol.
	*/
	}
	ret = boottime->free_pool(handles);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}

	/* Test ConvertDevicePathToText */
	string = device_path_to_text->convert_device_path_to_text(
	(struct efi_device_path *)dp2, true, false);
	if (!string) {
	efi_st_error("ConvertDevicePathToText failed\n");
	return EFI_ST_FAILURE;
	}
	if (efi_st_strcmp_16_8(
	string,
	"/VenHw(dbca4c98-6cb0-694d-0872-819c650cbbb1)/VenHw(dbca4c98-6cb0-694d-0872-819c650cbba2)")
	) {
	efi_st_printf("dp2: %ps\n", string);
	efi_st_error("Incorrect text from ConvertDevicePathToText\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->free_pool(string);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}

	/* Test ConvertDeviceNodeToText */
	string = device_path_to_text->convert_device_node_to_text(
	(struct efi_device_path *)&dp_node, true, false);
	if (!string) {
	efi_st_error("ConvertDeviceNodeToText failed\n");
	return EFI_ST_FAILURE;
	}
	if (efi_st_strcmp_16_8(string, "u-boot")) {
	efi_st_printf("dp_node: %ps\n", string);
	efi_st_error(
	"Incorrect conversion by ConvertDeviceNodeToText\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->free_pool(string);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}

	/* Test LocateDevicePath */
	remaining_dp = (struct efi_device_path *)dp3;
	ret = boottime->locate_device_path(&guid_protocol, &remaining_dp,
	&handle);
	if (ret != EFI_SUCCESS) {
	efi_st_error("LocateDevicePath failed\n");
	return EFI_ST_FAILURE;
	}
	if (handle != handle2) {
	efi_st_error("LocateDevicePath returned wrong handle\n");
	return EFI_ST_FAILURE;
	}
	string = device_path_to_text->convert_device_path_to_text(remaining_dp,
	true, false);
	if (!string) {
	efi_st_error("ConvertDevicePathToText failed\n");
	return EFI_ST_FAILURE;
	}
	if (efi_st_strcmp_16_8(string,
	"/VenHw(dbca4c98-6cb0-694d-0872-819c650cbbc3)")
	) {
	efi_st_printf("remaining device path: %ps\n", string);
	efi_st_error("LocateDevicePath: wrong remaining device path\n");
	return EFI_ST_FAILURE;
	}
	ret = boottime->free_pool(string);
	if (ret != EFI_SUCCESS) {
	efi_st_error("FreePool failed\n");
	return EFI_ST_FAILURE;
	}

	return EFI_ST_SUCCESS;
	}

	EFI_UNIT_TEST(devicepath) = {
	.name = "device path",
	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
	.setup = setup,
	.execute = execute,
	.teardown = teardown,
	};