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/*
* Copyright (c) 2021-2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <AK/Types.h>
#include <Kernel/Sections.h>
#include <Kernel/Storage/ATA/AHCI.h>
#include <Kernel/Storage/ATA/ATAController.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
class AsyncBlockDeviceRequest;
class AHCIInterruptHandler;
class AHCIPort;
class AHCIController final : public ATAController
, public PCI::Device {
friend class AHCIInterruptHandler;
public:
static NonnullRefPtr<AHCIController> initialize(PCI::DeviceIdentifier const& pci_device_identifier);
virtual ~AHCIController() override;
virtual RefPtr<StorageDevice> device(u32 index) const override;
virtual bool reset() override;
virtual bool shutdown() override;
virtual size_t devices_count() const override;
virtual void start_request(ATADevice const&, AsyncBlockDeviceRequest&) override;
virtual void complete_current_request(AsyncDeviceRequest::RequestResult) override;
void handle_interrupt_for_port(Badge<AHCIInterruptHandler>, u32 port_index) const;
private:
void disable_global_interrupts() const;
void enable_global_interrupts() const;
explicit AHCIController(PCI::DeviceIdentifier const&);
void initialize_hba(PCI::DeviceIdentifier const&);
AHCI::HBADefinedCapabilities capabilities() const;
RefPtr<StorageDevice> device_by_port(u32 index) const;
volatile AHCI::PortRegisters& port(size_t port_number) const;
NonnullOwnPtr<Memory::Region> default_hba_region() const;
volatile AHCI::HBA& hba() const;
Array<RefPtr<AHCIPort>, 32> m_ports;
NonnullOwnPtr<Memory::Region> m_hba_region;
AHCI::HBADefinedCapabilities m_hba_capabilities;
// FIXME: There could be multiple IRQ (MSI) handlers for AHCI. Find a way to use all of them.
OwnPtr<AHCIInterruptHandler> m_irq_handler;
// Note: This lock is intended to be locked when doing changes to HBA registers
// that affect its core functionality in a manner that controls all attached storage devices
// to the HBA SATA ports.
mutable Spinlock m_hba_control_lock;
};
}
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