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https://github.com/RGBCube/serenity
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500b7b08d6
The Storage subsystem, like the Audio and HID subsystems, exposes Unix device files (for example, in the /dev directory). To ensure consistency across the repository, we should make the Storage subsystem to reside in the Kernel/Devices directory like the two other mentioned subsystems.
95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
/*
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* Copyright (c) 2020-2022, 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 <AK/OwnPtr.h>
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#include <AK/Types.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Devices/Storage/ATA/ATADiskDevice.h>
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#include <Kernel/Devices/Storage/ATA/GenericIDE/Channel.h>
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#include <Kernel/Devices/Storage/ATA/GenericIDE/Controller.h>
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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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ErrorOr<void> IDEController::reset()
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{
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return Error::from_errno(ENOTIMPL);
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}
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ErrorOr<void> IDEController::shutdown()
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{
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return Error::from_errno(ENOTIMPL);
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}
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size_t IDEController::devices_count() const
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{
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size_t count = 0;
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for (u32 index = 0; index < 4; index++) {
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if (!device(index).is_null())
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count++;
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}
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return count;
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}
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void IDEController::start_request(ATADevice const& device, AsyncBlockDeviceRequest& request)
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{
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auto& address = device.ata_address();
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VERIFY(address.subport < 2);
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switch (address.port) {
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case 0: {
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auto result = m_channels[0]->start_request(device, request);
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// FIXME: Propagate errors properly
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VERIFY(!result.is_error());
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return;
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}
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case 1: {
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auto result = m_channels[1]->start_request(device, request);
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// FIXME: Propagate errors properly
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VERIFY(!result.is_error());
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return;
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}
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}
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VERIFY_NOT_REACHED();
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}
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void IDEController::complete_current_request(AsyncDeviceRequest::RequestResult)
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{
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VERIFY_NOT_REACHED();
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}
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UNMAP_AFTER_INIT IDEController::IDEController() = default;
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UNMAP_AFTER_INIT IDEController::~IDEController() = default;
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LockRefPtr<StorageDevice> IDEController::device_by_channel_and_position(u32 index) const
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{
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switch (index) {
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case 0:
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return m_channels[0]->connected_device(0);
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case 1:
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return m_channels[0]->connected_device(1);
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case 2:
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return m_channels[1]->connected_device(0);
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case 3:
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return m_channels[1]->connected_device(1);
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}
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VERIFY_NOT_REACHED();
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}
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LockRefPtr<StorageDevice> IDEController::device(u32 index) const
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{
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Vector<NonnullLockRefPtr<StorageDevice>> connected_devices;
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for (size_t index = 0; index < 4; index++) {
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auto checked_device = device_by_channel_and_position(index);
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if (checked_device.is_null())
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continue;
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connected_devices.append(checked_device.release_nonnull());
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}
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if (index >= connected_devices.size())
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return nullptr;
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return connected_devices[index];
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}
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}
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