1 // SPDX-License-Identifier: GPL-2.0-or-later 2 // 3 // ohci-serdes-test.c - An application of Kunit to check serialization/deserialization of data in 4 // buffers and registers defined in 1394 OHCI specification. 5 // 6 // Copyright (c) 2024 Takashi Sakamoto 7 8 #include <kunit/test.h> 9 10 #include "ohci.h" 11 12 13 static void test_self_id_count_register_deserialization(struct kunit *test) 14 { 15 const u32 expected = 0x803d0594; 16 17 bool is_error = ohci1394_self_id_count_is_error(expected); 18 u8 generation = ohci1394_self_id_count_get_generation(expected); 19 u32 size = ohci1394_self_id_count_get_size(expected); 20 21 KUNIT_EXPECT_TRUE(test, is_error); 22 KUNIT_EXPECT_EQ(test, 0x3d, generation); 23 KUNIT_EXPECT_EQ(test, 0x165, size); 24 } 25 26 static void test_self_id_receive_buffer_deserialization(struct kunit *test) 27 { 28 const u32 buffer[] = { 29 0x0006f38b, 30 0x807fcc56, 31 0x7f8033a9, 32 0x8145cc5e, 33 0x7eba33a1, 34 }; 35 36 u8 generation = ohci1394_self_id_receive_q0_get_generation(buffer[0]); 37 u16 timestamp = ohci1394_self_id_receive_q0_get_timestamp(buffer[0]); 38 39 KUNIT_EXPECT_EQ(test, 0x6, generation); 40 KUNIT_EXPECT_EQ(test, 0xf38b, timestamp); 41 } 42 43 static void test_at_data_serdes(struct kunit *test) 44 { 45 static const __le32 expected[] = { 46 cpu_to_le32(0x00020e80), 47 cpu_to_le32(0xffc2ffff), 48 cpu_to_le32(0xe0000000), 49 }; 50 __le32 quadlets[] = {0, 0, 0}; 51 bool has_src_bus_id = ohci1394_at_data_get_src_bus_id(expected); 52 unsigned int speed = ohci1394_at_data_get_speed(expected); 53 unsigned int tlabel = ohci1394_at_data_get_tlabel(expected); 54 unsigned int retry = ohci1394_at_data_get_retry(expected); 55 unsigned int tcode = ohci1394_at_data_get_tcode(expected); 56 unsigned int destination_id = ohci1394_at_data_get_destination_id(expected); 57 u64 destination_offset = ohci1394_at_data_get_destination_offset(expected); 58 59 KUNIT_EXPECT_FALSE(test, has_src_bus_id); 60 KUNIT_EXPECT_EQ(test, 0x02, speed); 61 KUNIT_EXPECT_EQ(test, 0x03, tlabel); 62 KUNIT_EXPECT_EQ(test, 0x02, retry); 63 KUNIT_EXPECT_EQ(test, 0x08, tcode); 64 65 ohci1394_at_data_set_src_bus_id(quadlets, has_src_bus_id); 66 ohci1394_at_data_set_speed(quadlets, speed); 67 ohci1394_at_data_set_tlabel(quadlets, tlabel); 68 ohci1394_at_data_set_retry(quadlets, retry); 69 ohci1394_at_data_set_tcode(quadlets, tcode); 70 ohci1394_at_data_set_destination_id(quadlets, destination_id); 71 ohci1394_at_data_set_destination_offset(quadlets, destination_offset); 72 73 KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected)); 74 } 75 76 static void test_it_data_serdes(struct kunit *test) 77 { 78 static const __le32 expected[] = { 79 cpu_to_le32(0x000349a7), 80 cpu_to_le32(0x02300000), 81 }; 82 __le32 quadlets[] = {0, 0}; 83 unsigned int scode = ohci1394_it_data_get_speed(expected); 84 unsigned int tag = ohci1394_it_data_get_tag(expected); 85 unsigned int channel = ohci1394_it_data_get_channel(expected); 86 unsigned int tcode = ohci1394_it_data_get_tcode(expected); 87 unsigned int sync = ohci1394_it_data_get_sync(expected); 88 unsigned int data_length = ohci1394_it_data_get_data_length(expected); 89 90 KUNIT_EXPECT_EQ(test, 0x03, scode); 91 KUNIT_EXPECT_EQ(test, 0x01, tag); 92 KUNIT_EXPECT_EQ(test, 0x09, channel); 93 KUNIT_EXPECT_EQ(test, 0x0a, tcode); 94 KUNIT_EXPECT_EQ(test, 0x7, sync); 95 KUNIT_EXPECT_EQ(test, 0x0230, data_length); 96 97 ohci1394_it_data_set_speed(quadlets, scode); 98 ohci1394_it_data_set_tag(quadlets, tag); 99 ohci1394_it_data_set_channel(quadlets, channel); 100 ohci1394_it_data_set_tcode(quadlets, tcode); 101 ohci1394_it_data_set_sync(quadlets, sync); 102 ohci1394_it_data_set_data_length(quadlets, data_length); 103 104 KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected)); 105 } 106 107 static struct kunit_case ohci_serdes_test_cases[] = { 108 KUNIT_CASE(test_self_id_count_register_deserialization), 109 KUNIT_CASE(test_self_id_receive_buffer_deserialization), 110 KUNIT_CASE(test_at_data_serdes), 111 KUNIT_CASE(test_it_data_serdes), 112 {} 113 }; 114 115 static struct kunit_suite ohci_serdes_test_suite = { 116 .name = "firewire-ohci-serdes", 117 .test_cases = ohci_serdes_test_cases, 118 }; 119 kunit_test_suite(ohci_serdes_test_suite); 120 121 MODULE_DESCRIPTION("FireWire buffers and registers serialization/deserialization unit test suite"); 122 MODULE_LICENSE("GPL"); 123