a7677f1d9b
For each exposed PCI device in sysfs, there's a new node called "rom" and by reading it, it exposes the raw data of a PCI option ROM blob to a user for examining the blob.
51 lines
3 KiB
C++
51 lines
3 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Bus/PCI/Access.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceAttribute.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceDirectory.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceExpansionROM.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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UNMAP_AFTER_INIT NonnullLockRefPtr<PCIDeviceSysFSDirectory> PCIDeviceSysFSDirectory::create(SysFSDirectory const& parent_directory, PCI::DeviceIdentifier const& device_identifier)
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{
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// FIXME: Handle allocation failure gracefully
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auto& address = device_identifier.address();
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auto device_name = MUST(KString::formatted("{:04x}:{:02x}:{:02x}.{}", address.domain(), address.bus(), address.device(), address.function()));
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auto directory = adopt_lock_ref(*new (nothrow) PCIDeviceSysFSDirectory(move(device_name), parent_directory, device_identifier));
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MUST(directory->m_child_components.with([&](auto& list) -> ErrorOr<void> {
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::VENDOR_ID, 2));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::DEVICE_ID, 2));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::CLASS, 1));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::SUBCLASS, 1));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::REVISION_ID, 1));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::PROG_IF, 1));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::SUBSYSTEM_VENDOR_ID, 2));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::SUBSYSTEM_ID, 2));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::BAR0, 4));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::BAR1, 4));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::BAR2, 4));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::BAR3, 4));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::BAR4, 4));
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list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::BAR5, 4));
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list.append(PCIDeviceExpansionROMSysFSComponent::create(*directory));
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return {};
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}));
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return directory;
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}
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UNMAP_AFTER_INIT PCIDeviceSysFSDirectory::PCIDeviceSysFSDirectory(NonnullOwnPtr<KString> device_directory_name, SysFSDirectory const& parent_directory, PCI::DeviceIdentifier const& device_identifier)
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: SysFSDirectory(parent_directory)
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, m_device_identifier(device_identifier)
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, m_device_directory_name(move(device_directory_name))
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{
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}
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}
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