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https://github.com/RGBCube/serenity
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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. :^)
51 lines
1.9 KiB
C++
51 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@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 <AK/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <Kernel/Bus/USB/PacketTypes.h>
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#include <Kernel/Bus/USB/USBPipe.h>
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#include <Kernel/Memory/AnonymousVMObject.h>
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#include <Kernel/Memory/PhysicalPage.h>
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#include <Kernel/Memory/Region.h>
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// TODO: Callback stuff in this class please!
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namespace Kernel::USB {
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class Transfer : public RefCounted<Transfer> {
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public:
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static ErrorOr<NonnullRefPtr<Transfer>> try_create(Pipe&, u16 length);
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public:
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Transfer() = delete;
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Transfer(Pipe& pipe, u16 len, NonnullOwnPtr<Memory::Region>);
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~Transfer();
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void set_setup_packet(const USBRequestData& request);
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void set_complete() { m_complete = true; }
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void set_error_occurred() { m_error_occurred = true; }
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// `const` here makes sure we don't blow up by writing to a physical address
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const USBRequestData& request() const { return m_request; }
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const Pipe& pipe() const { return m_pipe; }
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Pipe& pipe() { return m_pipe; }
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VirtualAddress buffer() const { return m_data_buffer->vaddr(); }
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PhysicalAddress buffer_physical() const { return m_data_buffer->physical_page(0)->paddr(); }
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u16 transfer_data_size() const { return m_transfer_data_size; }
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bool complete() const { return m_complete; }
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bool error_occurred() const { return m_error_occurred; }
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private:
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Pipe& m_pipe; // Pipe that initiated this transfer
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USBRequestData m_request; // USB request
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NonnullOwnPtr<Memory::Region> m_data_buffer; // DMA Data buffer for transaction
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u16 m_transfer_data_size { 0 }; // Size of the transfer's data stage
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bool m_complete { false }; // Has this transfer been completed?
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bool m_error_occurred { false }; // Did an error occur during this transfer?
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};
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}
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