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Kernel/USB: Add support for async & interrupt transfers

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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.
This commit is contained in:
b14ckcat 2022-10-17 01:22:54 -04:00 • committed by Andrew Kaster
parent 1aa16b4dd4
commit 7400eb3640
8 changed files with 181 additions and 62 deletions
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16
Kernel/Bus/USB/USBPipe.cpp
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@ -50,7 +50,7 @@ ErrorOr<size_t> ControlPipe::control_transfer(u8 request_type, u8 request, u16 v
usb_request.index = index;
usb_request.length = length;
auto transfer = TRY(Transfer::try_create(*this, length, *m_dma_buffer));
auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer));
transfer->set_setup_packet(usb_request);
dbgln_if(USB_DEBUG, "ControlPipe: Transfer allocated @ {}", transfer->buffer_physical());
@ -84,7 +84,7 @@ ErrorOr<size_t> BulkInPipe::bulk_in_transfer(size_t length, void* data)
size_t transfer_length = 0;
auto transfer = TRY(Transfer::try_create(*this, length, *m_dma_buffer));
auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer));
dbgln_if(USB_DEBUG, "Pipe: Bulk in transfer allocated @ {}", transfer->buffer_physical());
transfer_length = TRY(m_controller->submit_bulk_transfer(*transfer));
@ -114,7 +114,7 @@ ErrorOr<size_t> BulkOutPipe::bulk_out_transfer(size_t length, void* data)
MutexLocker lock(m_dma_buffer_lock);
size_t transfer_length = 0;
auto transfer = TRY(Transfer::try_create(*this, length, *m_dma_buffer));
auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer));
TRY(transfer->write_buffer(length, data));
dbgln_if(USB_DEBUG, "Pipe: Bulk out transfer allocated @ {}", transfer->buffer_physical());
@ -137,6 +137,16 @@ InterruptInPipe::InterruptInPipe(USBController const& controller, u8 endpoint_ad
{
}
ErrorOr<NonnullLockRefPtr<Transfer>> InterruptInPipe::interrupt_in_transfer(size_t length, u16 ms_interval, USBAsyncCallback callback)
{
VERIFY(length <= m_dma_buffer->size());
auto transfer = TRY(Transfer::create(*this, length, *m_dma_buffer, move(callback)));
dbgln_if(USB_DEBUG, "Pipe: Interrupt in transfer allocated @ {}", transfer->buffer_physical());
TRY(m_controller->submit_async_interrupt_transfer(transfer, ms_interval));
return transfer;
}
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)
{
VERIFY(buffer_size >= max_packet_size);