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https://github.com/LadybirdBrowser/ladybird.git
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4dc3617f3c
Like what happened with the PCI and USB code, this feels like the right thing to do because we can improve on the ATA capabilities and keep it distinguished from the rest of the subsystem.
56 lines
1.8 KiB
C++
56 lines
1.8 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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#pragma once
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#include <AK/OwnPtr.h>
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#include <Kernel/Storage/ATA/IDEChannel.h>
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namespace Kernel {
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class AsyncBlockDeviceRequest;
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struct [[gnu::packed]] PhysicalRegionDescriptor {
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u32 offset;
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u16 size { 0 };
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u16 end_of_table { 0 };
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};
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class IDEController;
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class BMIDEChannel final : public IDEChannel {
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friend class IDEController;
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friend class PATADiskDevice;
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public:
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static NonnullRefPtr<BMIDEChannel> create(const IDEController&, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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static NonnullRefPtr<BMIDEChannel> create(const IDEController&, u8 irq, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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virtual ~BMIDEChannel() override {};
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virtual bool is_dma_enabled() const override { return true; };
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private:
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BMIDEChannel(const IDEController&, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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BMIDEChannel(const IDEController&, u8 irq, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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void initialize();
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void complete_current_request(AsyncDeviceRequest::RequestResult);
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//^ IRQHandler
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virtual bool handle_irq(const RegisterState&) override;
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//* IDEChannel
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virtual void send_ata_io_command(LBAMode lba_mode, Direction direction) const override;
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virtual void ata_read_sectors(bool, u16) override;
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virtual void ata_write_sectors(bool, u16) override;
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PhysicalRegionDescriptor& prdt() { return *reinterpret_cast<PhysicalRegionDescriptor*>(m_prdt_region->vaddr().as_ptr()); }
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OwnPtr<Memory::Region> m_prdt_region;
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OwnPtr<Memory::Region> m_dma_buffer_region;
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RefPtr<Memory::PhysicalPage> m_prdt_page;
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RefPtr<Memory::PhysicalPage> m_dma_buffer_page;
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};
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}
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