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https://github.com/fergalmoran/ladybird.git
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6014ce0552
Prepare to remove biglock on PCI::Access in a future commit, so we can ensure we only lock a spinlock on a precise PCI HostController if needed instead of the entire subsystem.
36 lines
1.4 KiB
C++
36 lines
1.4 KiB
C++
/*
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* Copyright (c) 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/Bitmap.h>
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#include <AK/Vector.h>
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#include <Kernel/Bus/PCI/Controller/MemoryBackedHostBridge.h>
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#include <Kernel/Locking/Spinlock.h>
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namespace Kernel::PCI {
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class VolumeManagementDevice final : public MemoryBackedHostBridge {
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public:
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static NonnullOwnPtr<VolumeManagementDevice> must_create(PCI::DeviceIdentifier const& device_identifier);
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private:
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VolumeManagementDevice(PCI::Domain const&, PhysicalAddress);
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virtual void write8_field_locked(BusNumber, DeviceNumber, FunctionNumber, u32 field, u8 value) override;
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virtual void write16_field_locked(BusNumber, DeviceNumber, FunctionNumber, u32 field, u16 value) override;
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virtual void write32_field_locked(BusNumber, DeviceNumber, FunctionNumber, u32 field, u32 value) override;
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virtual u8 read8_field_locked(BusNumber, DeviceNumber, FunctionNumber, u32 field) override;
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virtual u16 read16_field_locked(BusNumber, DeviceNumber, FunctionNumber, u32 field) override;
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virtual u32 read32_field_locked(BusNumber, DeviceNumber, FunctionNumber, u32 field) override;
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// Note: All read and writes must be done with a spinlock because
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// Linux says that CPU might deadlock otherwise if access is not serialized.
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Spinlock<LockRank::None> m_config_lock {};
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};
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}
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