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firewire: core: add test for root directory generation in config ROM generator

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The core function allows both the unit drivers and the userspace
applications to extend the system configuration ROM. Without any
extensions, the generator produces a root directory accompanied by two
descriptor leaves.

Add a KUnit test to verify the configuration ROM generated in this case.

Link: https://lore.kernel.org/r/20260901134534.2386577-8-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2026-09-01 22:45:28 +09:00
parent 1c4326e7d8
commit bea8f9df42
1 changed files with 100 additions and 0 deletions
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100
drivers/firewire/config-rom-generator-test.c
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@ -7,13 +7,113 @@
// This file can not be built independently since it is intentionally included in core-card.c. // This file can not be built independently since it is intentionally included in core-card.c.
#include <kunit/test.h> #include <kunit/test.h>
#include <kunit/device.h>
static const u32 config_rom_bare[] = {
cpu_to_be32(0x0404921b), // bus info
cpu_to_be32(0x31333934), // |
cpu_to_be32(0xf000b223), // |
cpu_to_be32(0x01234567), // |
cpu_to_be32(0x89abcdef), // v
cpu_to_be32(0x00051b70), // root directory
cpu_to_be32(0x0c0083c0), // |
cpu_to_be32(0x03001f11), // |
cpu_to_be32(0x81000003), // |
cpu_to_be32(0x17023901), // |
cpu_to_be32(0x81000008), // v
cpu_to_be32(0x00064cb7), // text descriptor leaf (from root)
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x4c696e75), // |
cpu_to_be32(0x78204669), // |
cpu_to_be32(0x72657769), // |
cpu_to_be32(0x72650000), // v
cpu_to_be32(0x0003ff1c), // text descriptor leaf (from root)
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x4a756a75), // v Juju is a code name at the development time of this stack.
};
static const struct generator_test_case {
const char *const name;
int config_rom_generation;
const __be32 *const expected;
unsigned int quadlet_length;
} generator_test_cases[] = {
{
.name = "bare",
.config_rom_generation = 0,
.expected = config_rom_bare,
.quadlet_length = ARRAY_SIZE(config_rom_bare),
},
};
// Define generator_test_gen_params.
KUNIT_ARRAY_PARAM_DESC(generator_test, generator_test_cases, name);
struct state_data {
struct fw_card card;
__be32 config_rom[(CSR_CONFIG_ROM_END - CSR_CONFIG_ROM) / sizeof(__be32)];
};
static void test_config_rom_generator(struct kunit *test)
{
const struct generator_test_case *test_case = test->param_value;
struct state_data *state = test->priv;
struct fw_card *card = &state->card;
__be32 *config_rom = state->config_rom;
card->config_rom_generation = test_case->config_rom_generation;
card->link_speed = SCODE_800;
card->max_receive = 11;
card->guid = 0x0123456789abcdefULL;
scoped_guard(mutex, &card_mutex) {
generate_config_rom(card, config_rom);
KUNIT_EXPECT_EQ(test, config_rom_length, test_case->quadlet_length);
}
KUNIT_EXPECT_MEMEQ(test, config_rom, test_case->expected,
sizeof(*test_case->expected) * test_case->quadlet_length);
}
static const struct fw_card_driver dummy_card_driver;
static int config_rom_generator_test_init(struct kunit *test)
{
struct state_data *state = kunit_kzalloc(test, sizeof(*state), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, state);
struct device *dev = kunit_device_register(test, "dummy-device");
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
fw_card_initialize(&state->card, &dummy_card_driver, dev);
test->priv = state;
return 0;
}
static void config_rom_generator_test_exit(struct kunit *test)
{
struct state_data *state = test->priv;
kunit_device_unregister(test, state->card.device);
kunit_kfree(test, state);
}
static struct kunit_case config_rom_generator_test_cases[] = { static struct kunit_case config_rom_generator_test_cases[] = {
KUNIT_CASE_PARAM(test_config_rom_generator, generator_test_gen_params),
{} {}
}; };
static struct kunit_suite config_rom_generator_test_suite = { static struct kunit_suite config_rom_generator_test_suite = {
.name = "firewire-config-rom-generator", .name = "firewire-config-rom-generator",
.init = config_rom_generator_test_init,
.exit = config_rom_generator_test_exit,
.test_cases = config_rom_generator_test_cases, .test_cases = config_rom_generator_test_cases,
}; };
kunit_test_suite(config_rom_generator_test_suite); kunit_test_suite(config_rom_generator_test_suite);