efi_selftest: test for (Dis)ConnectController

This unit test checks the following protocol services:
ConnectController, DisconnectController,
InstallProtocol, UninstallProtocol,
OpenProtocol, CloseProtcol, OpenProtocolInformation

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

2 files changed, 386 insertions, 0 deletions

diff --git a/lib/efi_selftest/Makefile b/lib/efi_selftest/Makefile
index 837e86228e..e549553c82 100644
--- a/lib/efi_selftest/Makefile
+++ b/lib/efi_selftest/Makefile
@@ -9,6 +9,7 @@
 
 obj-$(CONFIG_CMD_BOOTEFI_SELFTEST) += \
 efi_selftest.o \
+efi_selftest_controllers.o \
 efi_selftest_console.o \
 efi_selftest_devicepath.o \
 efi_selftest_events.o \
diff --git a/lib/efi_selftest/efi_selftest_controllers.c b/lib/efi_selftest/efi_selftest_controllers.c
new file mode 100644
index 0000000000..1a22aba6f4
--- /dev/null
+++ b/lib/efi_selftest/efi_selftest_controllers.c
@@ -0,0 +1,385 @@
+/*
+ * efi_selftest_controllers
+ *
+ * Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ *
+ * This unit test checks the following protocol services:
+ * ConnectController, DisconnectController,
+ * InstallProtocol, UninstallProtocol,
+ * OpenProtocol, CloseProtcol, OpenProtocolInformation
+ */
+
+#include <efi_selftest.h>
+
+#define NUMBER_OF_CHILD_CONTROLLERS 4
+
+static struct efi_boot_services *boottime;
+const efi_guid_t guid_driver_binding_protocol =
+			EFI_DRIVER_BINDING_PROTOCOL_GUID;
+static efi_guid_t guid_controller =
+	EFI_GUID(0xe6ab1d96, 0x6bff, 0xdb42,
+		 0xaa, 0x05, 0xc8, 0x1f, 0x7f, 0x45, 0x26, 0x34);
+static efi_guid_t guid_child_controller =
+	EFI_GUID(0x1d41f6f5, 0x2c41, 0xddfb,
+		 0xe2, 0x9b, 0xb8, 0x0e, 0x2e, 0xe8, 0x3a, 0x85);
+static efi_handle_t handle_controller;
+static efi_handle_t handle_child_controller[NUMBER_OF_CHILD_CONTROLLERS];
+static efi_handle_t handle_driver;
+
+/*
+ * Count child controllers
+ *
+ * @handle	handle on which child controllers are installed
+ * @protocol	protocol for which the child controlles where installed
+ * @count	number of child controllers
+ * @return	status code
+ */
+static efi_status_t count_child_controllers(efi_handle_t handle,
+					    efi_guid_t *protocol,
+					    efi_uintn_t *count)
+{
+	efi_status_t ret;
+	efi_uintn_t entry_count;
+	struct efi_open_protocol_info_entry *entry_buffer;
+
+	*count = 0;
+	ret = boottime->open_protocol_information(handle, protocol,
+						  &entry_buffer, &entry_count);
+	if (ret != EFI_SUCCESS)
+		return ret;
+	if (!entry_count)
+		return EFI_SUCCESS;
+	while (entry_count) {
+		if (entry_buffer[--entry_count].attributes &
+		    EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER)
+			++*count;
+	}
+	ret = boottime->free_pool(entry_buffer);
+	if (ret != EFI_SUCCESS)
+		efi_st_error("Cannot free buffer\n");
+	return ret;
+}
+
+/*
+ * Check if the driver supports the controller.
+ *
+ * @this			driver binding protocol
+ * @controller_handle		handle of the controller
+ * @remaining_device_path	path specifying the child controller
+ * @return			status code
+ */
+static efi_status_t EFIAPI supported(
+		struct efi_driver_binding_protocol *this,
+		efi_handle_t controller_handle,
+		struct efi_device_path *remaining_device_path)
+{
+	efi_status_t ret;
+	void *interface;
+
+	ret = boottime->open_protocol(
+			controller_handle, &guid_controller,
+			&interface, handle_driver,
+			controller_handle, EFI_OPEN_PROTOCOL_BY_DRIVER);
+	switch (ret) {
+	case EFI_ACCESS_DENIED:
+	case EFI_ALREADY_STARTED:
+		return ret;
+	case EFI_SUCCESS:
+		break;
+	default:
+		return EFI_UNSUPPORTED;
+	}
+	ret = boottime->close_protocol(
+				controller_handle, &guid_controller,
+				handle_driver, controller_handle);
+	if (ret != EFI_SUCCESS)
+		ret = EFI_UNSUPPORTED;
+	return ret;
+}
+
+/*
+ * Create child controllers and attach driver.
+ *
+ * @this			driver binding protocol
+ * @controller_handle		handle of the controller
+ * @remaining_device_path	path specifying the child controller
+ * @return			status code
+ */
+static efi_status_t EFIAPI start(
+		struct efi_driver_binding_protocol *this,
+		efi_handle_t controller_handle,
+		struct efi_device_path *remaining_device_path)
+{
+	size_t i;
+	efi_status_t ret;
+	void *interface;
+
+	/* Attach driver to controller */
+	ret = boottime->open_protocol(
+			controller_handle, &guid_controller,
+			&interface, handle_driver,
+			controller_handle, EFI_OPEN_PROTOCOL_BY_DRIVER);
+	switch (ret) {
+	case EFI_ACCESS_DENIED:
+	case EFI_ALREADY_STARTED:
+		return ret;
+	case EFI_SUCCESS:
+		break;
+	default:
+		return EFI_UNSUPPORTED;
+	}
+
+	/* Create child controllers */
+	for (i = 0; i < NUMBER_OF_CHILD_CONTROLLERS; ++i) {
+		ret = boottime->install_protocol_interface(
+			&handle_child_controller[i], &guid_child_controller,
+			EFI_NATIVE_INTERFACE, NULL);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error("InstallProtocolInterface failed\n");
+			return EFI_ST_FAILURE;
+		}
+		ret = boottime->open_protocol(
+			controller_handle, &guid_controller,
+			&interface, handle_child_controller[i],
+			handle_child_controller[i],
+			EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error("OpenProtocol failed\n");
+			return EFI_ST_FAILURE;
+		}
+	}
+	return ret;
+}
+
+/*
+ * Remove a single child controller from the parent controller.
+ *
+ * @controller_handle	parent controller
+ * @child_handle	child controller
+ * @return		status code
+ */
+static efi_status_t disconnect_child(efi_handle_t controller_handle,
+				     efi_handle_t child_handle)
+{
+	efi_status_t ret;
+
+	ret = boottime->close_protocol(
+				controller_handle, &guid_controller,
+				child_handle, child_handle);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Cannot close protocol\n");
+		return ret;
+	}
+	ret = boottime->uninstall_protocol_interface(
+				child_handle, &guid_child_controller, NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Cannot uninstall protocol interface\n");
+		return ret;
+	}
+	return ret;
+}
+
+/*
+ * Remove child controllers and disconnect the controller.
+ *
+ * @this			driver binding protocol
+ * @controller_handle		handle of the controller
+ * @number_of_children		number of child controllers to remove
+ * @child_handle_buffer		handles of the child controllers to remove
+ * @return			status code
+ */
+static efi_status_t EFIAPI stop(
+		struct efi_driver_binding_protocol *this,
+		efi_handle_t controller_handle,
+		size_t number_of_children,
+		efi_handle_t *child_handle_buffer)
+{
+	efi_status_t ret;
+	efi_uintn_t count;
+	struct efi_open_protocol_info_entry *entry_buffer;
+
+	/* Destroy provided child controllers */
+	if (number_of_children) {
+		efi_uintn_t i;
+
+		for (i = 0; i < number_of_children; ++i) {
+			ret = disconnect_child(controller_handle,
+					       child_handle_buffer[i]);
+			if (ret != EFI_SUCCESS)
+				return ret;
+		}
+		return EFI_SUCCESS;
+	}
+
+	/* Destroy all children */
+	ret = boottime->open_protocol_information(
+					controller_handle, &guid_controller,
+					&entry_buffer, &count);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("OpenProtocolInformation failed\n");
+		return ret;
+	}
+	while (count) {
+		if (entry_buffer[--count].attributes &
+		    EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {
+			ret = disconnect_child(
+					controller_handle,
+					entry_buffer[count].agent_handle);
+			if (ret != EFI_SUCCESS)
+				return ret;
+		}
+	}
+	ret = boottime->free_pool(entry_buffer);
+	if (ret != EFI_SUCCESS)
+		efi_st_error("Cannot free buffer\n");
+
+	/* Detach driver from controller */
+	ret = boottime->close_protocol(
+			controller_handle, &guid_controller,
+			handle_driver, controller_handle);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Cannot close protocol\n");
+		return ret;
+	}
+	return EFI_SUCCESS;
+}
+
+/* Driver binding protocol interface */
+static struct efi_driver_binding_protocol binding_interface = {
+	supported,
+	start,
+	stop,
+	0xffffffff,
+	NULL,
+	NULL,
+	};
+
+/*
+ * Setup unit test.
+ *
+ * @handle	handle of the loaded image
+ * @systable	system table
+ */
+static int setup(const efi_handle_t img_handle,
+		 const struct efi_system_table *systable)
+{
+	efi_status_t ret;
+
+	boottime = systable->boottime;
+
+	/* Create controller handle */
+	ret = boottime->install_protocol_interface(
+			&handle_controller, &guid_controller,
+			EFI_NATIVE_INTERFACE, NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("InstallProtocolInterface failed\n");
+		return EFI_ST_FAILURE;
+	}
+	/* Create driver handle */
+	ret = boottime->install_protocol_interface(
+			&handle_driver,  &guid_driver_binding_protocol,
+			EFI_NATIVE_INTERFACE, &binding_interface);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("InstallProtocolInterface failed\n");
+		return EFI_ST_FAILURE;
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Execute unit test.
+ *
+ * The number of child controllers is checked after each of the following
+ * actions:
+ *
+ * Connect a controller to a driver.
+ * Disconnect and destroy a child controller.
+ * Disconnect and destroy the remaining child controllers.
+ *
+ * Connect a controller to a driver.
+ * Uninstall the driver protocol from the controller.
+ */
+static int execute(void)
+{
+	efi_status_t ret;
+	efi_uintn_t count;
+
+	/* Connect controller to driver */
+	ret = boottime->connect_controller(handle_controller, NULL, NULL, 1);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to connect controller\n");
+		return EFI_ST_FAILURE;
+	}
+	/* Check number of child controllers */
+	ret = count_child_controllers(handle_controller, &guid_controller,
+				      &count);
+	if (ret != EFI_SUCCESS || count != NUMBER_OF_CHILD_CONTROLLERS) {
+		efi_st_error("Number of children %u != %u\n",
+			     (unsigned int)count, NUMBER_OF_CHILD_CONTROLLERS);
+	}
+	/* Destroy second child controller */
+	ret = boottime->disconnect_controller(handle_controller,
+					      handle_driver,
+					      handle_child_controller[1]);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to disconnect child controller\n");
+		return EFI_ST_FAILURE;
+	}
+	/* Check number of child controllers */
+	ret = count_child_controllers(handle_controller, &guid_controller,
+				      &count);
+	if (ret != EFI_SUCCESS || count != NUMBER_OF_CHILD_CONTROLLERS - 1) {
+		efi_st_error("Destroying single child controller failed\n");
+		return EFI_ST_FAILURE;
+	}
+	/* Destroy remaining child controllers and disconnect controller */
+	ret = boottime->disconnect_controller(handle_controller, NULL, NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to disconnect controller\n");
+		return EFI_ST_FAILURE;
+	}
+	/* Check number of child controllers */
+	ret = count_child_controllers(handle_controller, &guid_controller,
+				      &count);
+	if (ret != EFI_SUCCESS || count) {
+		efi_st_error("Destroying child controllers failed\n");
+		return EFI_ST_FAILURE;
+	}
+
+	/* Connect controller to driver */
+	ret = boottime->connect_controller(handle_controller, NULL, NULL, 1);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to connect controller\n");
+		return EFI_ST_FAILURE;
+	}
+	/* Check number of child controllers */
+	ret = count_child_controllers(handle_controller, &guid_controller,
+				      &count);
+	if (ret != EFI_SUCCESS || count != NUMBER_OF_CHILD_CONTROLLERS) {
+		efi_st_error("Number of children %u != %u\n",
+			     (unsigned int)count, NUMBER_OF_CHILD_CONTROLLERS);
+	}
+	/* Uninstall controller protocol */
+	ret = boottime->uninstall_protocol_interface(handle_controller,
+						     &guid_controller, NULL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Failed to uninstall protocols\n");
+		return EFI_ST_FAILURE;
+	}
+	/* Check number of child controllers */
+	ret = count_child_controllers(handle_controller, &guid_controller,
+				      &count);
+	if (ret == EFI_SUCCESS)
+		efi_st_error("Uninstall failed\n");
+	return EFI_ST_SUCCESS;
+}
+
+EFI_UNIT_TEST(controllers) = {
+	.name = "controllers",
+	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+	.setup = setup,
+	.execute = execute,
+};