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Kernel/USB: Add support for bulk transfers

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b14ckcat 2022-05-08 01:36:20 -04:00 • committed by Andreas Kling
parent 6a3f959e92
commit 8a7876d65c
7 changed files with 80 additions and 0 deletions
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44
Kernel/Bus/USB/UHCI/UHCIController.cpp
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@ -430,6 +430,50 @@ ErrorOr<size_t> UHCIController::submit_control_transfer(Transfer& transfer)
return transfer_size;
}
ErrorOr<size_t> UHCIController::submit_bulk_transfer(Transfer& transfer)
{
Pipe& pipe = transfer.pipe();
dbgln_if(UHCI_DEBUG, "UHCI: Received bulk transfer for address {}. Root Hub is at address {}.", pipe.device_address(), m_root_hub->device_address());
// Create a new descriptor chain
TransferDescriptor* last_data_descriptor;
TransferDescriptor* data_descriptor_chain;
auto buffer_address = Ptr32<u8>(transfer.buffer_physical().as_ptr());
TRY(create_chain(pipe, transfer.pipe().direction() == Pipe::Direction::In ? PacketID::IN : PacketID::OUT, buffer_address, pipe.max_packet_size(), transfer.transfer_data_size(), &data_descriptor_chain, &last_data_descriptor));
last_data_descriptor->terminate();
if constexpr (UHCI_VERBOSE_DEBUG) {
if (data_descriptor_chain) {
dbgln("Data TD");
data_descriptor_chain->print();
}
}
QueueHead* transfer_queue = allocate_queue_head();
if (!transfer_queue) {
free_descriptor_chain(data_descriptor_chain);
return 0;
}
transfer_queue->attach_transfer_descriptor_chain(data_descriptor_chain);
transfer_queue->set_transfer(&transfer);
m_bulk_qh->attach_transfer_queue(*transfer_queue);
size_t transfer_size = 0;
while (!transfer.complete()) {
transfer_size = poll_transfer_queue(*transfer_queue);
dbgln_if(USB_DEBUG, "Transfer size: {}", transfer_size);
}
free_descriptor_chain(transfer_queue->get_first_td());
transfer_queue->free();
m_queue_head_pool->release_to_pool(transfer_queue);
return transfer_size;
}
size_t UHCIController::poll_transfer_queue(QueueHead& transfer_queue)
{
Transfer* transfer = transfer_queue.transfer();