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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.
68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/*
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* Copyright (c) 2021-2022, 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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#pragma once
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#include <AK/OwnPtr.h>
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#include <AK/Types.h>
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#include <Kernel/Devices/Storage/ATA/AHCI/Definitions.h>
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#include <Kernel/Devices/Storage/ATA/ATAController.h>
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#include <Kernel/Devices/Storage/StorageDevice.h>
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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Memory/TypedMapping.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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class AsyncBlockDeviceRequest;
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class AHCIInterruptHandler;
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class AHCIPort;
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class AHCIController final : public ATAController
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, public PCI::Device {
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friend class AHCIInterruptHandler;
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public:
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static ErrorOr<NonnullRefPtr<AHCIController>> initialize(PCI::DeviceIdentifier const& pci_device_identifier);
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virtual ~AHCIController() override;
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virtual StringView device_name() const override { return "AHCI"sv; }
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virtual LockRefPtr<StorageDevice> device(u32 index) const override;
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virtual ErrorOr<void> reset() override;
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virtual ErrorOr<void> shutdown() override;
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virtual size_t devices_count() const override;
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virtual void start_request(ATADevice const&, AsyncBlockDeviceRequest&) override;
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virtual void complete_current_request(AsyncDeviceRequest::RequestResult) override;
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void handle_interrupt_for_port(Badge<AHCIInterruptHandler>, u32 port_index) const;
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private:
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void disable_global_interrupts() const;
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void enable_global_interrupts() const;
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explicit AHCIController(PCI::DeviceIdentifier const&);
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ErrorOr<void> initialize_hba(PCI::DeviceIdentifier const&);
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AHCI::HBADefinedCapabilities capabilities() const;
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LockRefPtr<StorageDevice> device_by_port(u32 index) const;
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volatile AHCI::PortRegisters& port(size_t port_number) const;
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ErrorOr<Memory::TypedMapping<AHCI::HBA volatile>> map_default_hba_region(PCI::DeviceIdentifier const&);
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volatile AHCI::HBA& hba() const;
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Array<LockRefPtr<AHCIPort>, 32> m_ports;
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Memory::TypedMapping<AHCI::HBA volatile> m_hba_mapping;
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AHCI::HBADefinedCapabilities m_hba_capabilities;
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// FIXME: There could be multiple IRQ (MSI) handlers for AHCI. Find a way to use all of them.
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OwnPtr<AHCIInterruptHandler> m_irq_handler;
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// Note: This lock is intended to be locked when doing changes to HBA registers
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// that affect its core functionality in a manner that controls all attached storage devices
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// to the HBA SATA ports.
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mutable Spinlock<LockRank::None> m_hba_control_lock {};
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};
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}
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