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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
70 lines
2.4 KiB
C++
70 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> 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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