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71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, 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/IntrusiveList.h>
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#include <Kernel/Devices/BlockDevice.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Locking/Mutex.h>
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#include <Kernel/Storage/Partition/DiskPartition.h>
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#include <Kernel/Storage/StorageController.h>
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namespace Kernel {
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class StorageDevice : public BlockDevice {
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friend class StorageManagement;
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public:
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// Note: this attribute describes the internal command set of a Storage device.
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// For example, an ordinary harddrive utilizes the ATA command set, while
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// an ATAPI device (e.g. Optical drive) that is connected to the ATA bus,
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// is actually using SCSI commands (packets) encapsulated inside an ATA command.
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// The IDE controller code being aware of the possibility of ATAPI devices attached
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// to the ATA bus, will check whether the Command set is ATA or SCSI and will act
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// accordingly.
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enum class CommandSet {
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PlainMemory,
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SCSI,
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ATA,
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NVMe,
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};
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public:
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virtual u64 max_addressable_block() const { return m_max_addressable_block; }
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// ^BlockDevice
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual bool can_read(const OpenFileDescription&, size_t) const override;
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
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virtual bool can_write(const OpenFileDescription&, size_t) const override;
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virtual void prepare_for_unplug() { m_partitions.clear(); }
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// FIXME: Remove this method after figuring out another scheme for naming.
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StringView early_storage_name() const;
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NonnullRefPtrVector<DiskPartition> const& partitions() const { return m_partitions; }
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virtual CommandSet command_set() const = 0;
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// ^File
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virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) final;
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protected:
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StorageDevice(int, int, size_t, u64, NonnullOwnPtr<KString>);
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// ^DiskDevice
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virtual StringView class_name() const override;
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private:
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mutable IntrusiveListNode<StorageDevice, RefPtr<StorageDevice>> m_list_node;
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NonnullRefPtrVector<DiskPartition> m_partitions;
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// FIXME: Remove this method after figuring out another scheme for naming.
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NonnullOwnPtr<KString> m_early_storage_device_name;
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u64 m_max_addressable_block;
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};
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}
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