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Kernel/USB: Add support for async & interrupt transfers
Add support for async transfers by using a separate kernel task to poll a list of active async transfers on a set time interval, and invoke their user-provided callback function when they are complete. Also add support for the interrupt class of transfers, building off of this async functionality.
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parent
1aa16b4dd4
commit
7400eb3640
8 changed files with 181 additions and 62 deletions
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@ -50,7 +50,7 @@ ErrorOr<size_t> ControlPipe::control_transfer(u8 request_type, u8 request, u16 v
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usb_request.index = index;
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usb_request.length = length;
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auto transfer = TRY(Transfer::try_create(*this, length, *m_dma_buffer));
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auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer));
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transfer->set_setup_packet(usb_request);
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dbgln_if(USB_DEBUG, "ControlPipe: Transfer allocated @ {}", transfer->buffer_physical());
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@ -84,7 +84,7 @@ ErrorOr<size_t> BulkInPipe::bulk_in_transfer(size_t length, void* data)
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size_t transfer_length = 0;
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auto transfer = TRY(Transfer::try_create(*this, length, *m_dma_buffer));
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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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transfer_length = TRY(m_controller->submit_bulk_transfer(*transfer));
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@ -114,7 +114,7 @@ ErrorOr<size_t> BulkOutPipe::bulk_out_transfer(size_t length, void* data)
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MutexLocker lock(m_dma_buffer_lock);
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size_t transfer_length = 0;
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auto transfer = TRY(Transfer::try_create(*this, length, *m_dma_buffer));
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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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@ -137,6 +137,16 @@ InterruptInPipe::InterruptInPipe(USBController const& controller, u8 endpoint_ad
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{
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}
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ErrorOr<NonnullLockRefPtr<Transfer>> InterruptInPipe::interrupt_in_transfer(size_t length, u16 ms_interval, USBAsyncCallback callback)
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{
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VERIFY(length <= m_dma_buffer->size());
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auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer, move(callback)));
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dbgln_if(USB_DEBUG, "Pipe: Interrupt in transfer allocated @ {}", transfer->buffer_physical());
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TRY(m_controller->submit_async_interrupt_transfer(transfer, ms_interval));
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return transfer;
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}
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ErrorOr<NonnullOwnPtr<InterruptOutPipe>> InterruptOutPipe::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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