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firewire: core: add test to generate with AV/C unit in config ROM generator

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There is a standard layout of configuration ROM for AV/C devices.

Add a KUnit test to verify that the generator produces the expected
configuration ROM when an AV/C unit is registered.

Link: https://lore.kernel.org/r/20260901134534.2386577-9-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2026-09-01 22:45:29 +09:00
parent bea8f9df42
commit c0c5987f4b
1 changed files with 71 additions and 0 deletions
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71
drivers/firewire/config-rom-generator-test.c
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@ -34,6 +34,59 @@ static const u32 config_rom_bare[] = {
cpu_to_be32(0x4a756a75), // v Juju is a code name at the development time of this stack.
};
// Following to Configuration ROM for AV/C Devices 1.0 (Dec. 2000. 1394 Trading Association,
// Document 1999027).
#define UNIT_SPEC_ID_1394TA 0x0000a02d
#define UNIT_SW_VERSION_AVC 0x00010001
#define UNIT_SW_VERSION_IIDC_0104 0x00000100
static const u32 avc_unit_directory_and_leaf[] = {
0x00040000, // Unit directory consists of below 4 quads.
(CSR_SPECIFIER_ID << 24) | UNIT_SPEC_ID_1394TA,
(CSR_VERSION << 24) | UNIT_SW_VERSION_AVC,
(CSR_MODEL << 24) | 0x00260827, // Today.
((CSR_LEAF | CSR_DESCRIPTOR) << 24) | 0x00000001, // Point to next quadlet.
0x00030000, // Text leaf consists of below 3 quads.
0x00000000,
0x00000000,
0x50756900, // Pui is the name of a cat that the author takes care of.
};
static const u32 config_rom_with_avc_unit[] = {
cpu_to_be32(0x0404c1e5), // bus info
cpu_to_be32(0x31333934), // |
cpu_to_be32(0xf000b233), // |
cpu_to_be32(0x01234567), // |
cpu_to_be32(0x89abcdef), // v
cpu_to_be32(0x0006a2d2), // root directory
cpu_to_be32(0x0c0083c0), // |
cpu_to_be32(0x03001f11), // |
cpu_to_be32(0x81000004), // |
cpu_to_be32(0x17023901), // |
cpu_to_be32(0x81000009), // |
cpu_to_be32(0xd100000c), // 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
cpu_to_be32(0x0004227b), // unit directory (from root)
cpu_to_be32(0x1200a02d), // |
cpu_to_be32(0x13010001), // |
cpu_to_be32(0x17260827), // |
cpu_to_be32(0x81000001), // v
cpu_to_be32(0x0003f771), // text descriptor leaf (from unit)
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x50756900), // v
};
static const struct generator_test_case {
const char *const name;
int config_rom_generation;
@ -46,6 +99,12 @@ static const struct generator_test_case {
.expected = config_rom_bare,
.quadlet_length = ARRAY_SIZE(config_rom_bare),
},
{
.name = "with_avc_unit",
.config_rom_generation = 1,
.expected = config_rom_with_avc_unit,
.quadlet_length = ARRAY_SIZE(config_rom_with_avc_unit),
},
};
// Define generator_test_gen_params.
@ -58,6 +117,12 @@ struct state_data {
static void test_config_rom_generator(struct kunit *test)
{
// Use kernel stack since they should be mutable for doubly linked-list.
struct fw_descriptor avc_unit_entry = {
.length = ARRAY_SIZE(avc_unit_directory_and_leaf),
.key = (CSR_DIRECTORY | CSR_UNIT) << 24,
.data = avc_unit_directory_and_leaf,
};
const struct generator_test_case *test_case = test->param_value;
struct state_data *state = test->priv;
struct fw_card *card = &state->card;
@ -68,6 +133,9 @@ static void test_config_rom_generator(struct kunit *test)
card->max_receive = 11;
card->guid = 0x0123456789abcdefULL;
if (test_case->expected == config_rom_with_avc_unit)
KUNIT_EXPECT_EQ(test, fw_core_add_descriptor(&avc_unit_entry), 0);
scoped_guard(mutex, &card_mutex) {
generate_config_rom(card, config_rom);
KUNIT_EXPECT_EQ(test, config_rom_length, test_case->quadlet_length);
@ -75,6 +143,9 @@ static void test_config_rom_generator(struct kunit *test)
KUNIT_EXPECT_MEMEQ(test, config_rom, test_case->expected,
sizeof(*test_case->expected) * test_case->quadlet_length);
if (test_case->expected == config_rom_with_avc_unit)
fw_core_remove_descriptor(&avc_unit_entry);
}
static const struct fw_card_driver dummy_card_driver;