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https://github.com/RGBCube/serenity
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11eee67b85
Until now, our kernel has reimplemented a number of AK classes to provide automatic internal locking: - RefPtr - NonnullRefPtr - WeakPtr - Weakable This patch renames the Kernel classes so that they can coexist with the original AK classes: - RefPtr => LockRefPtr - NonnullRefPtr => NonnullLockRefPtr - WeakPtr => LockWeakPtr - Weakable => LockWeakable The goal here is to eventually get rid of the Lock* classes in favor of using external locking.
52 lines
1.5 KiB
C++
52 lines
1.5 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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#include <Kernel/Bus/USB/USBTransfer.h>
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#include <Kernel/Memory/MemoryManager.h>
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namespace Kernel::USB {
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ErrorOr<NonnullLockRefPtr<Transfer>> Transfer::try_create(Pipe& pipe, u16 length, Memory::Region& dma_buffer)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) Transfer(pipe, length, dma_buffer));
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}
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Transfer::Transfer(Pipe& pipe, u16 len, Memory::Region& dma_buffer)
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: m_pipe(pipe)
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, m_dma_buffer(dma_buffer)
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, m_transfer_data_size(len)
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{
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}
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Transfer::~Transfer() = default;
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void Transfer::set_setup_packet(USBRequestData const& request)
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{
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// Kind of a nasty hack... Because the kernel isn't in the business
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// of handing out physical pointers that we can directly write to,
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// we set the address of the setup packet to be the first 8 bytes of
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// the data buffer, which we then set to the physical address.
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auto* request_data = reinterpret_cast<USBRequestData*>(buffer().as_ptr());
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request_data->request_type = request.request_type;
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request_data->request = request.request;
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request_data->value = request.value;
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request_data->index = request.index;
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request_data->length = request.length;
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m_request = request;
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}
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ErrorOr<void> Transfer::write_buffer(u16 len, void* data)
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{
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VERIFY(len <= m_dma_buffer.size());
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m_transfer_data_size = len;
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memcpy(buffer().as_ptr(), data, len);
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return {};
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}
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}
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