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firewire: core: add test to generate with IIDC unit in config ROM generator

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There is a standard layout of configuration ROM for IIDC devices.

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

Link: https://lore.kernel.org/r/20260901134534.2386577-10-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2026-09-01 22:45:30 +09:00
parent c0c5987f4b
commit 49e4d0eea6
1 changed files with 92 additions and 0 deletions
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92
drivers/firewire/config-rom-generator-test.c
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@ -87,6 +87,81 @@ static const u32 config_rom_with_avc_unit[] = {
cpu_to_be32(0x50756900), // v
};
// Following to 1394-based Digital Camera Specification Version 1.04 (Aug. 1996. 1394 Trading
// Association)
#define IIDC_COMMAND_REGS_BASE 0x00
#define IIDC_VENDOR_NAME_LEAF 0x01
#define IIDC_MODEL_NAME_LEAF 0x02
static const u32 iidc_unit_directories_and_leafs[] = {
0x00030000,
(CSR_SPECIFIER_ID << 24) | UNIT_SPEC_ID_1394TA,
(CSR_VERSION << 24) | UNIT_SW_VERSION_IIDC_0104,
((CSR_DIRECTORY | CSR_DEPENDENT_INFO) << 24) | 0x00000001,
0x00030000,
((CSR_OFFSET | IIDC_COMMAND_REGS_BASE) << 24) | 0x00012345,
((CSR_LEAF | IIDC_VENDOR_NAME_LEAF) << 24) | 0x00000002,
((CSR_LEAF | IIDC_MODEL_NAME_LEAF) << 24) | 0x00000008,
0x00060000, // Text leaf consists of below 6 quads.
0x00000000,
0x00000000,
0x4c696e75, // Use the same name in root directory.
0x78204669,
0x72657769,
0x72650000,
0x00040000, // Text leaf consists of below 4 quads.
0x00000000,
0x00000000,
0x43686566, // Chef Cat is a nick name when inventing IEEE 1394 itself.
0x20436174,
};
static const u32 config_rom_with_iidc_unit[] = {
cpu_to_be32(0x04046a3e), // bus info
cpu_to_be32(0x31333934), // |
cpu_to_be32(0xf000b243), // |
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(0x0003d7fe), // unit directory (from root)
cpu_to_be32(0x1200a02d), // |
cpu_to_be32(0x13000100), // |
cpu_to_be32(0xd4000001), // v
cpu_to_be32(0x0003ea57), // dependent directory (from unit directory)
cpu_to_be32(0x40012345), // |
cpu_to_be32(0x81000002), // |
cpu_to_be32(0x82000008), // v
cpu_to_be32(0x00064cb7), // text descriptor leaf (from dependent directory)
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(0x0004a3e9), // text descriptor leaf (from dependent directory)
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x00000000), // |
cpu_to_be32(0x43686566), // |
cpu_to_be32(0x20436174), // v
};
static const struct generator_test_case {
const char *const name;
int config_rom_generation;
@ -105,6 +180,12 @@ static const struct generator_test_case {
.expected = config_rom_with_avc_unit,
.quadlet_length = ARRAY_SIZE(config_rom_with_avc_unit),
},
{
.name = "with_iidc_unit",
.config_rom_generation = 2,
.expected = config_rom_with_iidc_unit,
.quadlet_length = ARRAY_SIZE(config_rom_with_iidc_unit),
},
};
// Define generator_test_gen_params.
@ -123,6 +204,11 @@ static void test_config_rom_generator(struct kunit *test)
.key = (CSR_DIRECTORY | CSR_UNIT) << 24,
.data = avc_unit_directory_and_leaf,
};
struct fw_descriptor iidc_unit_entry = {
.length = ARRAY_SIZE(iidc_unit_directories_and_leafs),
.key = (CSR_DIRECTORY | CSR_UNIT) << 24,
.data = iidc_unit_directories_and_leafs,
};
const struct generator_test_case *test_case = test->param_value;
struct state_data *state = test->priv;
struct fw_card *card = &state->card;
@ -136,6 +222,9 @@ static void test_config_rom_generator(struct kunit *test)
if (test_case->expected == config_rom_with_avc_unit)
KUNIT_EXPECT_EQ(test, fw_core_add_descriptor(&avc_unit_entry), 0);
if (test_case->expected == config_rom_with_iidc_unit)
KUNIT_EXPECT_EQ(test, fw_core_add_descriptor(&iidc_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);
@ -144,6 +233,9 @@ 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_iidc_unit)
fw_core_remove_descriptor(&iidc_unit_entry);
if (test_case->expected == config_rom_with_avc_unit)
fw_core_remove_descriptor(&avc_unit_entry);
}