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Kernel/USB: Add UKBuffer variants of certain BulkPipe/Transfer functions
These will be useful for directly accessing the source/destination buffers, without going through a third buffer first.
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4 changed files with 43 additions and 0 deletions
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@ -94,6 +94,22 @@ ErrorOr<size_t> BulkInPipe::submit_bulk_in_transfer(size_t length, void* data)
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return transfer_length;
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}
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ErrorOr<size_t> BulkInPipe::submit_bulk_in_transfer(size_t length, UserOrKernelBuffer data)
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{
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VERIFY(length <= m_dma_buffer->size());
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MutexLocker lock(m_dma_buffer_lock);
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auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer));
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dbgln_if(USB_DEBUG, "Pipe: Bulk in transfer allocated @ {}", transfer->buffer_physical());
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size_t transfer_length = TRY(m_controller->submit_bulk_transfer(*transfer));
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TRY(data.write(transfer->buffer().as_ptr(), min(length, transfer_length)));
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dbgln_if(USB_DEBUG, "Pipe: Bulk in transfer complete!");
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return transfer_length;
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}
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ErrorOr<NonnullOwnPtr<BulkOutPipe>> BulkOutPipe::create(USBController const& controller, u8 endpoint_address, u16 max_packet_size, i8 device_address, size_t buffer_size)
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{
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VERIFY(buffer_size >= max_packet_size);
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@ -124,6 +140,22 @@ ErrorOr<size_t> BulkOutPipe::submit_bulk_out_transfer(size_t length, void* data)
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return transfer_length;
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}
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ErrorOr<size_t> BulkOutPipe::submit_bulk_out_transfer(size_t length, UserOrKernelBuffer data)
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{
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VERIFY(length <= m_dma_buffer->size());
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MutexLocker lock(m_dma_buffer_lock);
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auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer));
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TRY(transfer->write_buffer(length, data));
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dbgln_if(USB_DEBUG, "Pipe: Bulk out transfer allocated @ {}", transfer->buffer_physical());
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size_t transfer_length = TRY(m_controller->submit_bulk_transfer(*transfer));
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dbgln_if(USB_DEBUG, "Pipe: Bulk out transfer complete!");
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return transfer_length;
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}
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ErrorOr<NonnullOwnPtr<InterruptInPipe>> InterruptInPipe::create(USBController const& controller, u8 endpoint_address, u16 max_packet_size, i8 device_address, u16 poll_interval, size_t buffer_size)
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{
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VERIFY(buffer_size >= max_packet_size);
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