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d234e6b801
Add polling support to NVMe so that it does not use interrupt to complete a IO but instead actively polls for completion. This probably is not very efficient in terms of CPU usage but it does not use interrupts to complete a IO which is beneficial at the moment as there is no MSI(X) support and it can reduce the latency of an IO in a very fast NVMe device. The NVMeQueue class has been made the base class for NVMeInterruptQueue and NVMePollQueue. The factory function `NVMeQueue::try_create` will return the appropriate queue to the controller based on the polling boot parameter. The polling mode can be enabled by adding an extra boot parameter: `nvme_poll`.
59 lines
1.5 KiB
C++
59 lines
1.5 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 <AK/NonnullRefPtr.h>
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#include <AK/NonnullRefPtrVector.h>
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#include <AK/Types.h>
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/Storage/Partition/DiskPartition.h>
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#include <Kernel/Storage/StorageController.h>
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#include <Kernel/Storage/StorageDevice.h>
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namespace Kernel {
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class PartitionTable;
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class StorageManagement {
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public:
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StorageManagement();
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static bool initialized();
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void initialize(StringView boot_argument, bool force_pio, bool nvme_poll);
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static StorageManagement& the();
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NonnullRefPtr<FileSystem> root_filesystem() const;
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static MajorNumber storage_type_major_number();
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static MinorNumber generate_storage_minor_number();
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void remove_device(StorageDevice&);
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private:
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bool boot_argument_contains_partition_uuid();
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void enumerate_controllers(bool force_pio, bool nvme_poll);
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void enumerate_storage_devices();
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void enumerate_disk_partitions();
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void determine_boot_device();
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void determine_boot_device_with_partition_uuid();
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void dump_storage_devices_and_partitions() const;
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OwnPtr<PartitionTable> try_to_initialize_partition_table(const StorageDevice&) const;
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RefPtr<BlockDevice> boot_block_device() const;
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StringView m_boot_argument;
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WeakPtr<BlockDevice> m_boot_block_device;
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NonnullRefPtrVector<StorageController> m_controllers;
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IntrusiveList<&StorageDevice::m_list_node> m_storage_devices;
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};
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}
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