linux/drivers/fpga/tests/fpga-region-test.c

// SPDX-License-Identifier: GPL-2.0
/*
 * KUnit test for the FPGA Region
 *
 * Copyright (C) 2023 Red Hat, Inc.
 *
 * Author: Marco Pagani <[email protected]>
 */

#include <kunit/device.h>
#include <kunit/test.h>
#include <linux/fpga/fpga-bridge.h>
#include <linux/fpga/fpga-mgr.h>
#include <linux/fpga/fpga-region.h>
#include <linux/module.h>
#include <linux/types.h>

struct mgr_stats { … };

struct bridge_stats { … };

struct test_ctx { … };

/*
 * Wrappers to avoid cast warnings when passing action functions directly
 * to kunit_add_action().
 */
KUNIT_DEFINE_ACTION_WRAPPER(fpga_image_info_free_wrapper, fpga_image_info_free,
			    struct fpga_image_info *);

KUNIT_DEFINE_ACTION_WRAPPER(fpga_bridge_unregister_wrapper, fpga_bridge_unregister,
			    struct fpga_bridge *);

KUNIT_DEFINE_ACTION_WRAPPER(fpga_region_unregister_wrapper, fpga_region_unregister,
			    struct fpga_region *);

static int op_write(struct fpga_manager *mgr, const char *buf, size_t count)
{ … }

/*
 * Fake FPGA manager that implements only the write op to count the number
 * of programming cycles. The internals of the programming sequence are
 * tested in the Manager suite since they are outside the responsibility
 * of the Region.
 */
static const struct fpga_manager_ops fake_mgr_ops = …;

static int op_enable_set(struct fpga_bridge *bridge, bool enable)
{ … }

/*
 * Fake FPGA bridge that implements only enable_set op to count the number
 * of activation cycles.
 */
static const struct fpga_bridge_ops fake_bridge_ops = …;

static int fake_region_get_bridges(struct fpga_region *region)
{ … }

static int fake_region_match(struct device *dev, const void *data)
{ … }

static void fpga_region_test_class_find(struct kunit *test)
{ … }

/*
 * FPGA Region programming test. The Region must call get_bridges() to get
 * and control the bridges, and then the Manager for the actual programming.
 */
static void fpga_region_test_program_fpga(struct kunit *test)
{ … }

/*
 * The configuration used in this test suite uses a single bridge to
 * limit the code under test to a single unit. The functions used by the
 * Region for getting and controlling bridges are tested (with a list of
 * multiple bridges) in the Bridge suite.
 */
static int fpga_region_test_init(struct kunit *test)
{ … }

static struct kunit_case fpga_region_test_cases[] = …;

static struct kunit_suite fpga_region_suite = …;

kunit_test_suite(…) …;

MODULE_LICENSE(…) …;