mirror of
https://github.com/RGBCube/serenity
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11eee67b85
Until now, our kernel has reimplemented a number of AK classes to provide automatic internal locking: - RefPtr - NonnullRefPtr - WeakPtr - Weakable This patch renames the Kernel classes so that they can coexist with the original AK classes: - RefPtr => LockRefPtr - NonnullRefPtr => NonnullLockRefPtr - WeakPtr => LockWeakPtr - Weakable => LockWeakable The goal here is to eventually get rid of the Lock* classes in favor of using external locking.
95 lines
3 KiB
C++
95 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/Debug.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceAttribute.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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StringView PCIDeviceAttributeSysFSComponent::name() const
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{
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switch (m_offset) {
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case PCI::RegisterOffset::VENDOR_ID:
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return "vendor"sv;
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case PCI::RegisterOffset::DEVICE_ID:
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return "device_id"sv;
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case PCI::RegisterOffset::CLASS:
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return "class"sv;
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case PCI::RegisterOffset::SUBCLASS:
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return "subclass"sv;
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case PCI::RegisterOffset::REVISION_ID:
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return "revision"sv;
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case PCI::RegisterOffset::PROG_IF:
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return "progif"sv;
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case PCI::RegisterOffset::SUBSYSTEM_VENDOR_ID:
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return "subsystem_vendor"sv;
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case PCI::RegisterOffset::SUBSYSTEM_ID:
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return "subsystem_id"sv;
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case PCI::RegisterOffset::BAR0:
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return "bar0"sv;
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case PCI::RegisterOffset::BAR1:
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return "bar1"sv;
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case PCI::RegisterOffset::BAR2:
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return "bar2"sv;
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case PCI::RegisterOffset::BAR3:
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return "bar3"sv;
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case PCI::RegisterOffset::BAR4:
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return "bar4"sv;
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case PCI::RegisterOffset::BAR5:
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return "bar5"sv;
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default:
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VERIFY_NOT_REACHED();
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}
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}
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NonnullLockRefPtr<PCIDeviceAttributeSysFSComponent> PCIDeviceAttributeSysFSComponent::create(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width)
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{
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return adopt_lock_ref(*new (nothrow) PCIDeviceAttributeSysFSComponent(device, offset, field_bytes_width));
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}
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PCIDeviceAttributeSysFSComponent::PCIDeviceAttributeSysFSComponent(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width)
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: SysFSComponent()
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, m_device(device)
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, m_offset(offset)
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, m_field_bytes_width(field_bytes_width)
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{
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}
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ErrorOr<size_t> PCIDeviceAttributeSysFSComponent::read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription*) const
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{
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auto blob = TRY(try_to_generate_buffer());
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if ((size_t)offset >= blob->size())
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return 0;
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ssize_t nread = min(static_cast<off_t>(blob->size() - offset), static_cast<off_t>(count));
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TRY(buffer.write(blob->data() + offset, nread));
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return nread;
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}
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ErrorOr<NonnullOwnPtr<KBuffer>> PCIDeviceAttributeSysFSComponent::try_to_generate_buffer() const
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{
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OwnPtr<KString> value;
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switch (m_field_bytes_width) {
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case 1:
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value = TRY(KString::formatted("{:#x}", PCI::read8(m_device->address(), m_offset)));
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break;
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case 2:
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value = TRY(KString::formatted("{:#x}", PCI::read16(m_device->address(), m_offset)));
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break;
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case 4:
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value = TRY(KString::formatted("{:#x}", PCI::read32(m_device->address(), m_offset)));
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break;
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default:
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VERIFY_NOT_REACHED();
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}
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return KBuffer::try_create_with_bytes("PCIDeviceAttributeSysFSComponent: Device address"sv, value->view().bytes());
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}
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}
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