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
13static 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(value: expected);
18 u8 generation = ohci1394_self_id_count_get_generation(value: expected);
19 u32 size = ohci1394_self_id_count_get_size(value: 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
26static 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(quadlet0: buffer[0]);
37 u16 timestamp = ohci1394_self_id_receive_q0_get_timestamp(quadlet0: buffer[0]);
38
39 KUNIT_EXPECT_EQ(test, 0x6, generation);
40 KUNIT_EXPECT_EQ(test, 0xf38b, timestamp);
41}
42
43static 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(data: expected);
52 unsigned int speed = ohci1394_at_data_get_speed(data: expected);
53 unsigned int tlabel = ohci1394_at_data_get_tlabel(data: expected);
54 unsigned int retry = ohci1394_at_data_get_retry(data: expected);
55 unsigned int tcode = ohci1394_at_data_get_tcode(data: expected);
56 unsigned int destination_id = ohci1394_at_data_get_destination_id(data: expected);
57 u64 destination_offset = ohci1394_at_data_get_destination_offset(data: 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(data: quadlets, src_bus_id: has_src_bus_id);
66 ohci1394_at_data_set_speed(data: quadlets, scode: speed);
67 ohci1394_at_data_set_tlabel(data: quadlets, tlabel);
68 ohci1394_at_data_set_retry(data: quadlets, retry);
69 ohci1394_at_data_set_tcode(data: quadlets, tcode);
70 ohci1394_at_data_set_destination_id(data: quadlets, destination_id);
71 ohci1394_at_data_set_destination_offset(data: quadlets, offset: destination_offset);
72
73 KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
74}
75
76static 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(data: expected);
84 unsigned int tag = ohci1394_it_data_get_tag(data: expected);
85 unsigned int channel = ohci1394_it_data_get_channel(data: expected);
86 unsigned int tcode = ohci1394_it_data_get_tcode(data: expected);
87 unsigned int sync = ohci1394_it_data_get_sync(data: expected);
88 unsigned int data_length = ohci1394_it_data_get_data_length(data: 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(data: quadlets, scode);
98 ohci1394_it_data_set_tag(data: quadlets, tag);
99 ohci1394_it_data_set_channel(data: quadlets, channel);
100 ohci1394_it_data_set_tcode(data: quadlets, tcode);
101 ohci1394_it_data_set_sync(data: quadlets, sync);
102 ohci1394_it_data_set_data_length(data: quadlets, data_length);
103
104 KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
105}
106
107static 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
115static struct kunit_suite ohci_serdes_test_suite = {
116 .name = "firewire-ohci-serdes",
117 .test_cases = ohci_serdes_test_cases,
118};
119kunit_test_suite(ohci_serdes_test_suite);
120
121MODULE_DESCRIPTION("FireWire buffers and registers serialization/deserialization unit test suite");
122MODULE_LICENSE("GPL");
123

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source code of linux/drivers/firewire/ohci-serdes-test.c