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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.
55 lines
1.9 KiB
C++
55 lines
1.9 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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#include <Kernel/Devices/Storage/ATA/AHCI/InterruptHandler.h>
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namespace Kernel {
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UNMAP_AFTER_INIT ErrorOr<NonnullOwnPtr<AHCIInterruptHandler>> AHCIInterruptHandler::create(AHCIController& controller, u8 irq, AHCI::MaskedBitField taken_ports)
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{
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auto port_handler = TRY(adopt_nonnull_own_or_enomem(new (nothrow) AHCIInterruptHandler(controller, irq, taken_ports)));
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port_handler->allocate_resources_and_initialize_ports();
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return port_handler;
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}
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void AHCIInterruptHandler::allocate_resources_and_initialize_ports()
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{
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// Clear pending interrupts, if there are any!
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m_pending_ports_interrupts.set_all();
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enable_irq();
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}
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UNMAP_AFTER_INIT AHCIInterruptHandler::AHCIInterruptHandler(AHCIController& controller, u8 irq, AHCI::MaskedBitField taken_ports)
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: PCIIRQHandler(controller, irq)
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, m_parent_controller(controller)
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, m_taken_ports(taken_ports)
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, m_pending_ports_interrupts(create_pending_ports_interrupts_bitfield())
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{
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dbgln_if(AHCI_DEBUG, "AHCI Port Handler: IRQ {}", irq);
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}
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AHCI::MaskedBitField AHCIInterruptHandler::create_pending_ports_interrupts_bitfield() const
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{
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return AHCI::MaskedBitField((u32 volatile&)m_parent_controller->hba().control_regs.is, m_taken_ports.bit_mask());
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}
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AHCIInterruptHandler::~AHCIInterruptHandler() = default;
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bool AHCIInterruptHandler::handle_irq(RegisterState const&)
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{
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dbgln_if(AHCI_DEBUG, "AHCI Port Handler: IRQ received");
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if (m_pending_ports_interrupts.is_zeroed())
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return false;
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for (auto port_index : m_pending_ports_interrupts.to_vector()) {
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dbgln_if(AHCI_DEBUG, "AHCI Port Handler: Handling IRQ for port {}", port_index);
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m_parent_controller->handle_interrupt_for_port({}, port_index);
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// We do this to clear the pending interrupt after we handled it.
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m_pending_ports_interrupts.set_at(port_index);
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}
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return true;
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}
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}
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