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986c20bb3e
As the last part of support for legacy layout of configuration ROM, this
commit traverses vendor directory as well as root directory when
constructing modalias for unit device. The change brings loss of backward
compatibility since it can fill model field ('mo') which is 0 at current
implementation in the case. However, we can be optimistic against
regression for unit drivers in kernel, due to some points:
1. ALSA drivers for audio and music units use the model fields to match
device, however all of supported devices does not have such legacy
layout.
2. the other unit drivers (e.g. sbp2) does not use the model field to
match device.
The rest of concern is user space application. The most of applications
just take care of node device and does not use the modalias of unit
device, thus the change does not affect to them. But systemd project is
known to get affects from the change since it includes hwdb to take udev
to configure fw character device conveniently. I have a plan to work for
systemd so that the access permission of character device could be kept
across the change.
Suggested-by: Adam Goldman <adamg@pobox.com>
Link: https://lore.kernel.org/r/20231221134849.603857-9-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
252 lines
7.8 KiB
C
252 lines
7.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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//
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// device-attribute-test.c - An application of Kunit to test implementation for device attributes.
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//
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// Copyright (c) 2023 Takashi Sakamoto
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//
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// This file can not be built independently since it is intentionally included in core-device.c.
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#include <kunit/test.h>
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// Configuration ROM for AV/C Devices 1.0 (Dec. 12, 2000, 1394 Trading Association)
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// Annex C:Configuration ROM example(informative)
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// C.1 Simple AV/C device
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//
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// Copied from the documentation.
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static const u32 simple_avc_config_rom[] = {
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0x0404eabf,
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0x31333934,
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0xe0646102,
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0xffffffff,
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0xffffffff,
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0x00063287, // root directory.
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0x03ffffff,
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0x8100000a,
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0x17ffffff,
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0x8100000e,
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0x0c0083c0,
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0xd1000001,
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0x0004442d, // unit 0 directory.
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0x1200a02d,
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0x13010001,
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0x17ffffff,
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0x81000007,
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0x0005c915, // leaf for textual descriptor.
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0x00000000,
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0x00000000,
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0x56656e64,
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0x6f72204e,
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0x616d6500,
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0x00057f16, // leaf for textual descriptor.
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0x00000000,
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0x00000000,
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0x4d6f6465,
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0x6c204e61,
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0x6d650000,
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};
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// Ibid.
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// Annex A:Consideration for configuration ROM reader design (informative)
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// A.1 Vendor directory
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//
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// Written by hand.
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static const u32 legacy_avc_config_rom[] = {
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0x04199fe7,
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0x31333934,
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0xe0644000,
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0x00112233,
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0x44556677,
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0x0005dace, // root directory.
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0x03012345,
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0x0c0083c0,
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0x8d000009,
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0xd1000002,
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0xc3000004,
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0x0002e107, // unit 0 directory.
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0x12abcdef,
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0x13543210,
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0x0002cb73, // vendor directory.
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0x17fedcba,
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0x81000004,
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0x00026dc1, // leaf for EUI-64.
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0x00112233,
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0x44556677,
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0x00050e84, // leaf for textual descriptor.
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0x00000000,
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0x00000000,
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0x41424344,
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0x45464748,
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0x494a0000,
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};
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static void device_attr_simple_avc(struct kunit *test)
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{
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static const struct fw_device node = {
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.device = {
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.type = &fw_device_type,
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},
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.config_rom = simple_avc_config_rom,
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.config_rom_length = sizeof(simple_avc_config_rom),
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};
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static const struct fw_unit unit0 = {
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.device = {
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.type = &fw_unit_type,
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.parent = (struct device *)&node.device,
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},
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.directory = &simple_avc_config_rom[12],
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};
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struct device *node_dev = (struct device *)&node.device;
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struct device *unit0_dev = (struct device *)&unit0.device;
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static const int unit0_expected_ids[] = {0x00ffffff, 0x00ffffff, 0x0000a02d, 0x00010001};
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char *buf = kunit_kzalloc(test, PAGE_SIZE, GFP_KERNEL);
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int ids[4] = {0, 0, 0, 0};
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// Ensure associations for node and unit devices.
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KUNIT_ASSERT_TRUE(test, is_fw_device(node_dev));
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KUNIT_ASSERT_FALSE(test, is_fw_unit(node_dev));
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KUNIT_ASSERT_PTR_EQ(test, fw_device(node_dev), &node);
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KUNIT_ASSERT_FALSE(test, is_fw_device(unit0_dev));
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KUNIT_ASSERT_TRUE(test, is_fw_unit(unit0_dev));
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KUNIT_ASSERT_PTR_EQ(test, fw_parent_device((&unit0)), &node);
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KUNIT_ASSERT_PTR_EQ(test, fw_unit(unit0_dev), &unit0);
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// For entries in root directory.
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// Vendor immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[0].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0xffffff\n");
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// Model immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[4].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0xffffff\n");
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// Descriptor leaf entry for vendor is found.
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KUNIT_EXPECT_GT(test, show_text_leaf(node_dev, &config_rom_attributes[5].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "Vendor Name\n");
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// Descriptor leaf entry for model is found.
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KUNIT_EXPECT_GT(test, show_text_leaf(node_dev, &config_rom_attributes[6].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "Model Name\n");
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// For entries in unit 0 directory.
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// Vendor immediate entry is not found.
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KUNIT_EXPECT_LT(test, show_immediate(unit0_dev, &config_rom_attributes[0].attr, buf), 0);
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// Model immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[4].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0xffffff\n");
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// Descriptor leaf entry for vendor is not found.
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KUNIT_EXPECT_LT(test, show_text_leaf(unit0_dev, &config_rom_attributes[5].attr, buf), 0);
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// Descriptor leaf entry for model is found.
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KUNIT_EXPECT_GT(test, show_text_leaf(unit0_dev, &config_rom_attributes[6].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "Model Name\n");
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// Specifier_ID immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[2].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0x00a02d\n");
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// Version immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[3].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0x010001\n");
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kunit_kfree(test, buf);
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get_modalias_ids(&unit0, ids);
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KUNIT_EXPECT_MEMEQ(test, ids, unit0_expected_ids, sizeof(ids));
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}
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static void device_attr_legacy_avc(struct kunit *test)
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{
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static const struct fw_device node = {
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.device = {
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.type = &fw_device_type,
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},
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.config_rom = legacy_avc_config_rom,
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.config_rom_length = sizeof(legacy_avc_config_rom),
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};
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static const struct fw_unit unit0 = {
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.device = {
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.type = &fw_unit_type,
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.parent = (struct device *)&node.device,
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},
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.directory = &legacy_avc_config_rom[11],
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};
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struct device *node_dev = (struct device *)&node.device;
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struct device *unit0_dev = (struct device *)&unit0.device;
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static const int unit0_expected_ids[] = {0x00012345, 0x00fedcba, 0x00abcdef, 0x00543210};
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char *buf = kunit_kzalloc(test, PAGE_SIZE, GFP_KERNEL);
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int ids[4] = {0, 0, 0, 0};
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// Ensure associations for node and unit devices.
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KUNIT_ASSERT_TRUE(test, is_fw_device(node_dev));
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KUNIT_ASSERT_FALSE(test, is_fw_unit(node_dev));
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KUNIT_ASSERT_PTR_EQ(test, fw_device((node_dev)), &node);
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KUNIT_ASSERT_FALSE(test, is_fw_device(unit0_dev));
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KUNIT_ASSERT_TRUE(test, is_fw_unit(unit0_dev));
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KUNIT_ASSERT_PTR_EQ(test, fw_parent_device((&unit0)), &node);
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KUNIT_ASSERT_PTR_EQ(test, fw_unit(unit0_dev), &unit0);
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// For entries in root directory.
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// Vendor immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[0].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0x012345\n");
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// Model immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(node_dev, &config_rom_attributes[4].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0xfedcba\n");
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// Descriptor leaf entry for vendor is not found.
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KUNIT_EXPECT_LT(test, show_text_leaf(node_dev, &config_rom_attributes[5].attr, buf), 0);
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// Descriptor leaf entry for model is found.
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KUNIT_EXPECT_GT(test, show_text_leaf(node_dev, &config_rom_attributes[6].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "ABCDEFGHIJ\n");
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// For entries in unit 0 directory.
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// Vendor immediate entry is not found.
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KUNIT_EXPECT_LT(test, show_immediate(unit0_dev, &config_rom_attributes[0].attr, buf), 0);
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// Model immediate entry is not found.
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KUNIT_EXPECT_LT(test, show_immediate(unit0_dev, &config_rom_attributes[4].attr, buf), 0);
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// Descriptor leaf entry for vendor is not found.
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KUNIT_EXPECT_LT(test, show_text_leaf(unit0_dev, &config_rom_attributes[5].attr, buf), 0);
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// Descriptor leaf entry for model is not found.
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KUNIT_EXPECT_LT(test, show_text_leaf(unit0_dev, &config_rom_attributes[6].attr, buf), 0);
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// Specifier_ID immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[2].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0xabcdef\n");
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// Version immediate entry is found.
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KUNIT_EXPECT_GT(test, show_immediate(unit0_dev, &config_rom_attributes[3].attr, buf), 0);
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KUNIT_EXPECT_STREQ(test, buf, "0x543210\n");
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kunit_kfree(test, buf);
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get_modalias_ids(&unit0, ids);
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KUNIT_EXPECT_MEMEQ(test, ids, unit0_expected_ids, sizeof(ids));
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}
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static struct kunit_case device_attr_test_cases[] = {
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KUNIT_CASE(device_attr_simple_avc),
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KUNIT_CASE(device_attr_legacy_avc),
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{}
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};
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static struct kunit_suite device_attr_test_suite = {
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.name = "firewire-device-attribute",
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.test_cases = device_attr_test_cases,
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};
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kunit_test_suite(device_attr_test_suite);
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