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+// SPDX-License-Identifier: GPL-2.0-only
+//
+// device-attribute-test.c - An application of Kunit to test implementation for device attributes.
+//
+// Copyright (c) 2023 Takashi Sakamoto
+//
+// This file can not be built independently since it is intentionally included in core-device.c.
+
+#include <kunit/test.h>
+
+// Configuration ROM for AV/C Devices 1.0 (Dec. 12, 2000, 1394 Trading Association)
+// Annex C:Configuration ROM example(informative)
+// C.1 Simple AV/C device
+//
+// Copied from the documentation.
+static const u32 simple_avc_config_rom[] = {
+ 0x0404eabf,
+ 0x31333934,
+ 0xe0646102,
+ 0xffffffff,
+ 0xffffffff,
+ 0x00063287, // root directory.
+ 0x03ffffff,
+ 0x8100000a,
+ 0x17ffffff,
+ 0x8100000e,
+ 0x0c0083c0,
+ 0xd1000001,
+ 0x0004442d, // unit 0 directory.
+ 0x1200a02d,
+ 0x13010001,
+ 0x17ffffff,
+ 0x81000007,
+ 0x0005c915, // leaf for textual descriptor.
+ 0x00000000,
+ 0x00000000,
+ 0x56656e64,
+ 0x6f72204e,
+ 0x616d6500,
+ 0x00057f16, // leaf for textual descriptor.
+ 0x00000000,
+ 0x00000000,
+ 0x4d6f6465,
+ 0x6c204e61,
+ 0x6d650000,
+};
+
+// Ibid.
+// Annex A:Consideration for configuration ROM reader design (informative)
+// A.1 Vendor directory
+//
+// Written by hand.
+static const u32 legacy_avc_config_rom[] = {
+ 0x04199fe7,
+ 0x31333934,
+ 0xe0644000,
+ 0x00112233,
+ 0x44556677,
+ 0x0005dace, // root directory.
+ 0x03012345,
+ 0x0c0083c0,
+ 0x8d000009,
+ 0xd1000002,
+ 0xc3000004,
+ 0x0002e107, // unit 0 directory.
+ 0x12abcdef,
+ 0x13543210,
+ 0x0002cb73, // vendor directory.
+ 0x17fedcba,
+ 0x81000004,
+ 0x00026dc1, // leaf for EUI-64.
+ 0x00112233,
+ 0x44556677,
+ 0x00050e84, // leaf for textual descriptor.
+ 0x00000000,
+ 0x00000000,
+ 0x41424344,
+ 0x45464748,
+ 0x494a0000,
+};
+
+static void device_attr_simple_avc(struct kunit *test)
+{
+ static const struct fw_device node = {
+ .device = {
+ .type = &fw_device_type,
+ },
+ .config_rom = simple_avc_config_rom,
+ .config_rom_length = sizeof(simple_avc_config_rom),
+ };
+ static const struct fw_unit unit0 = {
+ .device = {
+ .type = &fw_unit_type,
+ .parent = (struct device *)&node.device,
+ },
+ .directory = &simple_avc_config_rom[12],
+ };
+ struct device *node_dev = (struct device *)&node.device;
+ struct device *unit0_dev = (struct device *)&unit0.device;
+ static const int unit0_expected_ids[] = {0x00ffffff, 0x00ffffff, 0x0000a02d, 0x00010001};
+ char *buf = kunit_kzalloc(test, PAGE_SIZE, GFP_KERNEL);
+ int ids[4] = {0, 0, 0, 0};
+
+ // Ensure associations for node and unit devices.
+
+ KUNIT_ASSERT_TRUE(test, is_fw_device(node_dev));
+ KUNIT_ASSERT_FALSE(test, is_fw_unit(node_dev));
+ KUNIT_ASSERT_PTR_EQ(test, fw_device(node_dev), &node);
+
+ KUNIT_ASSERT_FALSE(test, is_fw_device(unit0_dev));
+ KUNIT_ASSERT_TRUE(test, is_fw_unit(unit0_dev));
+ KUNIT_ASSERT_PTR_EQ(test, fw_parent_device((&unit0)), &node);
+ KUNIT_ASSERT_PTR_EQ(test, fw_unit(unit0_dev), &unit0);
+
+ // For entries in root directory.
+
+ // Vendor immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[0].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0xffffff\n");
+
+ // Model immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[4].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0xffffff\n");
+
+ // Descriptor leaf entry for vendor is found.
+ KUNIT_EXPECT_GT(test, show_text_leaf(node_dev, &config_rom_attributes[5].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "Vendor Name\n");
+
+ // Descriptor leaf entry for model is found.
+ KUNIT_EXPECT_GT(test, show_text_leaf(node_dev, &config_rom_attributes[6].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "Model Name\n");
+
+ // For entries in unit 0 directory.
+
+ // Vendor immediate entry is not found.
+ KUNIT_EXPECT_LT(test, show_immediate(unit0_dev, &config_rom_attributes[0].attr, buf), 0);
+
+ // Model immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[4].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0xffffff\n");
+
+ // Descriptor leaf entry for vendor is not found.
+ KUNIT_EXPECT_LT(test, show_text_leaf(unit0_dev, &config_rom_attributes[5].attr, buf), 0);
+
+ // Descriptor leaf entry for model is found.
+ KUNIT_EXPECT_GT(test, show_text_leaf(unit0_dev, &config_rom_attributes[6].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "Model Name\n");
+
+ // Specifier_ID immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[2].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0x00a02d\n");
+
+ // Version immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[3].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0x010001\n");
+
+ kunit_kfree(test, buf);
+
+ get_modalias_ids(&unit0, ids);
+ KUNIT_EXPECT_MEMEQ(test, ids, unit0_expected_ids, sizeof(ids));
+}
+
+static void device_attr_legacy_avc(struct kunit *test)
+{
+ static const struct fw_device node = {
+ .device = {
+ .type = &fw_device_type,
+ },
+ .config_rom = legacy_avc_config_rom,
+ .config_rom_length = sizeof(legacy_avc_config_rom),
+ };
+ static const struct fw_unit unit0 = {
+ .device = {
+ .type = &fw_unit_type,
+ .parent = (struct device *)&node.device,
+ },
+ .directory = &legacy_avc_config_rom[11],
+ };
+ struct device *node_dev = (struct device *)&node.device;
+ struct device *unit0_dev = (struct device *)&unit0.device;
+ static const int unit0_expected_ids[] = {0x00012345, 0x00fedcba, 0x00abcdef, 0x00543210};
+ char *buf = kunit_kzalloc(test, PAGE_SIZE, GFP_KERNEL);
+ int ids[4] = {0, 0, 0, 0};
+
+ // Ensure associations for node and unit devices.
+
+ KUNIT_ASSERT_TRUE(test, is_fw_device(node_dev));
+ KUNIT_ASSERT_FALSE(test, is_fw_unit(node_dev));
+ KUNIT_ASSERT_PTR_EQ(test, fw_device((node_dev)), &node);
+
+ KUNIT_ASSERT_FALSE(test, is_fw_device(unit0_dev));
+ KUNIT_ASSERT_TRUE(test, is_fw_unit(unit0_dev));
+ KUNIT_ASSERT_PTR_EQ(test, fw_parent_device((&unit0)), &node);
+ KUNIT_ASSERT_PTR_EQ(test, fw_unit(unit0_dev), &unit0);
+
+ // For entries in root directory.
+
+ // Vendor immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[0].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0x012345\n");
+
+ // Model immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[4].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0xfedcba\n");
+
+ // Descriptor leaf entry for vendor is not found.
+ KUNIT_EXPECT_LT(test, show_text_leaf(node_dev, &config_rom_attributes[5].attr, buf), 0);
+
+ // Descriptor leaf entry for model is found.
+ KUNIT_EXPECT_GT(test, show_text_leaf(node_dev, &config_rom_attributes[6].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "ABCDEFGHIJ\n");
+
+ // For entries in unit 0 directory.
+
+ // Vendor immediate entry is not found.
+ KUNIT_EXPECT_LT(test, show_immediate(unit0_dev, &config_rom_attributes[0].attr, buf), 0);
+
+ // Model immediate entry is not found.
+ KUNIT_EXPECT_LT(test, show_immediate(unit0_dev, &config_rom_attributes[4].attr, buf), 0);
+
+ // Descriptor leaf entry for vendor is not found.
+ KUNIT_EXPECT_LT(test, show_text_leaf(unit0_dev, &config_rom_attributes[5].attr, buf), 0);
+
+ // Descriptor leaf entry for model is not found.
+ KUNIT_EXPECT_LT(test, show_text_leaf(unit0_dev, &config_rom_attributes[6].attr, buf), 0);
+
+ // Specifier_ID immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[2].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0xabcdef\n");
+
+ // Version immediate entry is found.
+ KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[3].attr, buf), 0);
+ KUNIT_EXPECT_STREQ(test, buf, "0x543210\n");
+
+ kunit_kfree(test, buf);
+
+ get_modalias_ids(&unit0, ids);
+ KUNIT_EXPECT_MEMEQ(test, ids, unit0_expected_ids, sizeof(ids));
+}
+
+static struct kunit_case device_attr_test_cases[] = {
+ KUNIT_CASE(device_attr_simple_avc),
+ KUNIT_CASE(device_attr_legacy_avc),
+ {}
+};
+
+static struct kunit_suite device_attr_test_suite = {
+ .name = "firewire-device-attribute",
+ .test_cases = device_attr_test_cases,
+};
+kunit_test_suite(device_attr_test_suite);