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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <Kernel/Storage/ATA/IDEChannel.h>
namespace Kernel {
class AsyncBlockDeviceRequest;
struct [[gnu::packed]] PhysicalRegionDescriptor {
u32 offset;
u16 size { 0 };
u16 end_of_table { 0 };
};
class IDEController;
class BMIDEChannel final : public IDEChannel {
friend class IDEController;
friend class PATADiskDevice;
public:
static NonnullRefPtr<BMIDEChannel> create(IDEController const&, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
static NonnullRefPtr<BMIDEChannel> create(IDEController const&, u8 irq, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
virtual ~BMIDEChannel() override {};
virtual bool is_dma_enabled() const override { return true; };
private:
BMIDEChannel(IDEController const&, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
BMIDEChannel(IDEController const&, u8 irq, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
void initialize();
void complete_current_request(AsyncDeviceRequest::RequestResult);
//^ IRQHandler
virtual bool handle_irq(RegisterState const&) override;
//* IDEChannel
virtual void send_ata_io_command(LBAMode lba_mode, Direction direction) const override;
virtual void ata_read_sectors(bool, u16) override;
virtual void ata_write_sectors(bool, u16) override;
PhysicalRegionDescriptor& prdt() { return *reinterpret_cast<PhysicalRegionDescriptor*>(m_prdt_region->vaddr().as_ptr()); }
OwnPtr<Memory::Region> m_prdt_region;
OwnPtr<Memory::Region> m_dma_buffer_region;
RefPtr<Memory::PhysicalPage> m_prdt_page;
RefPtr<Memory::PhysicalPage> m_dma_buffer_page;
};
}
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