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In 1394 OHCI specification, the format of data for IT DMA is different from the format of isochronous packet in IEEE 1394 specification, in its spd and srcBusID fields. This commit adds some static inline functions to serialize/deserialize the data of IT DMA. Link: https://lore.kernel.org/r/20240802003606.109402-4-o-takashi@sakamocchi.jp Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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//
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// ohci-serdes-test.c - An application of Kunit to check serialization/deserialization of data in
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// buffers and registers defined in 1394 OHCI specification.
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//
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// Copyright (c) 2024 Takashi Sakamoto
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#include <kunit/test.h>
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#include "ohci.h"
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static void test_self_id_count_register_deserialization(struct kunit *test)
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{
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const u32 expected = 0x803d0594;
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bool is_error = ohci1394_self_id_count_is_error(expected);
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u8 generation = ohci1394_self_id_count_get_generation(expected);
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u32 size = ohci1394_self_id_count_get_size(expected);
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KUNIT_EXPECT_TRUE(test, is_error);
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KUNIT_EXPECT_EQ(test, 0x3d, generation);
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KUNIT_EXPECT_EQ(test, 0x165, size);
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}
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static void test_self_id_receive_buffer_deserialization(struct kunit *test)
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{
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const u32 buffer[] = {
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0x0006f38b,
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0x807fcc56,
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0x7f8033a9,
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0x8145cc5e,
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0x7eba33a1,
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};
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u8 generation = ohci1394_self_id_receive_q0_get_generation(buffer[0]);
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u16 timestamp = ohci1394_self_id_receive_q0_get_timestamp(buffer[0]);
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KUNIT_EXPECT_EQ(test, 0x6, generation);
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KUNIT_EXPECT_EQ(test, 0xf38b, timestamp);
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}
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static void test_at_data_serdes(struct kunit *test)
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{
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static const __le32 expected[] = {
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cpu_to_le32(0x00020e80),
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cpu_to_le32(0xffc2ffff),
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cpu_to_le32(0xe0000000),
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};
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__le32 quadlets[] = {0, 0, 0};
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bool has_src_bus_id = ohci1394_at_data_get_src_bus_id(expected);
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unsigned int speed = ohci1394_at_data_get_speed(expected);
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unsigned int tlabel = ohci1394_at_data_get_tlabel(expected);
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unsigned int retry = ohci1394_at_data_get_retry(expected);
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unsigned int tcode = ohci1394_at_data_get_tcode(expected);
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unsigned int destination_id = ohci1394_at_data_get_destination_id(expected);
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u64 destination_offset = ohci1394_at_data_get_destination_offset(expected);
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KUNIT_EXPECT_FALSE(test, has_src_bus_id);
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KUNIT_EXPECT_EQ(test, 0x02, speed);
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KUNIT_EXPECT_EQ(test, 0x03, tlabel);
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KUNIT_EXPECT_EQ(test, 0x02, retry);
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KUNIT_EXPECT_EQ(test, 0x08, tcode);
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ohci1394_at_data_set_src_bus_id(quadlets, has_src_bus_id);
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ohci1394_at_data_set_speed(quadlets, speed);
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ohci1394_at_data_set_tlabel(quadlets, tlabel);
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ohci1394_at_data_set_retry(quadlets, retry);
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ohci1394_at_data_set_tcode(quadlets, tcode);
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ohci1394_at_data_set_destination_id(quadlets, destination_id);
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ohci1394_at_data_set_destination_offset(quadlets, destination_offset);
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KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
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}
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static void test_it_data_serdes(struct kunit *test)
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{
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static const __le32 expected[] = {
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cpu_to_le32(0x000349a7),
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cpu_to_le32(0x02300000),
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};
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__le32 quadlets[] = {0, 0};
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unsigned int scode = ohci1394_it_data_get_speed(expected);
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unsigned int tag = ohci1394_it_data_get_tag(expected);
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unsigned int channel = ohci1394_it_data_get_channel(expected);
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unsigned int tcode = ohci1394_it_data_get_tcode(expected);
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unsigned int sync = ohci1394_it_data_get_sync(expected);
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unsigned int data_length = ohci1394_it_data_get_data_length(expected);
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KUNIT_EXPECT_EQ(test, 0x03, scode);
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KUNIT_EXPECT_EQ(test, 0x01, tag);
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KUNIT_EXPECT_EQ(test, 0x09, channel);
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KUNIT_EXPECT_EQ(test, 0x0a, tcode);
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KUNIT_EXPECT_EQ(test, 0x7, sync);
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KUNIT_EXPECT_EQ(test, 0x0230, data_length);
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ohci1394_it_data_set_speed(quadlets, scode);
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ohci1394_it_data_set_tag(quadlets, tag);
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ohci1394_it_data_set_channel(quadlets, channel);
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ohci1394_it_data_set_tcode(quadlets, tcode);
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ohci1394_it_data_set_sync(quadlets, sync);
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ohci1394_it_data_set_data_length(quadlets, data_length);
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KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
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}
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static struct kunit_case ohci_serdes_test_cases[] = {
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KUNIT_CASE(test_self_id_count_register_deserialization),
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KUNIT_CASE(test_self_id_receive_buffer_deserialization),
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KUNIT_CASE(test_at_data_serdes),
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KUNIT_CASE(test_it_data_serdes),
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{}
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};
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static struct kunit_suite ohci_serdes_test_suite = {
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.name = "firewire-ohci-serdes",
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.test_cases = ohci_serdes_test_cases,
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};
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kunit_test_suite(ohci_serdes_test_suite);
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MODULE_DESCRIPTION("FireWire buffers and registers serialization/deserialization unit test suite");
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MODULE_LICENSE("GPL");
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