mirror of
https://github.com/SerenityOS/serenity
synced 2026-05-15 03:16:44 +02:00
66cfe47ed8
For now we only support USB <3.0 devices, as we don't support streams. We also don't leverage the benefits of UAS, as we pretend to have a queue depth of 1, ie are single threaded. To test this driver, you can use the following command: ``` SERENITY_BOOT_DRIVE=usb-uas Meta/serenity.sh run x86_64 Clang ```
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/*
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* Copyright (c) 2024, Leon Albrecht <leon.a@serenityos.org>
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* Copyright (c) 2024, Sönke Holz <sholz8530@gmail.com>
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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 <Kernel/Devices/Storage/StorageDevice.h>
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namespace Kernel::USB {
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class UASInterface;
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class UASStorageDevice : public StorageDevice {
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public:
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UASStorageDevice(UASInterface&, LUNAddress logical_unit_number_address, u32 hardware_relative_controller_id, size_t sector_size, u64 max_addressable_block);
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private:
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UASInterface& m_interface;
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virtual void start_request(AsyncBlockDeviceRequest&) override;
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virtual CommandSet command_set() const override { return CommandSet::SCSI; }
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u32 optimal_block_count(u32 blocks);
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ErrorOr<void> do_read(u32 block_index, u32 block_count, UserOrKernelBuffer& buffer, size_t buffer_size);
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ErrorOr<void> do_write(u32 block_index, u32 block_count, UserOrKernelBuffer& buffer, size_t buffer_size);
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ErrorOr<void> query_characteristics();
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Optional<u16> m_optimal_transfer_length;
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Optional<u32> m_optimal_transfer_length_granularity;
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Optional<u32> m_maximum_transfer_length;
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IntrusiveListNode<UASStorageDevice, NonnullLockRefPtr<UASStorageDevice>> m_list_node;
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public:
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using List = IntrusiveList<&UASStorageDevice::m_list_node>;
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};
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}
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