RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 13:17:44 +00:00
Code Issues Activity Actions

Kernel/USB: Support UHCI full speed bandwidth reclamation

Browse source
This commit is contained in:
b14ckcat 2022-07-10 20:31:14 -04:00 • committed by Andreas Kling
parent 95238bdb16
commit 4ad437f3a7
2 changed files with 4 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

6
Kernel/Bus/USB/UHCI/UHCIController.cpp
View file

@ -213,8 +213,10 @@ UNMAP_AFTER_INIT void UHCIController::setup_schedule()
piix4_td_hack->set_max_len(0x7ff); // Null data packet
piix4_td_hack->set_device_address(0x7f);
piix4_td_hack->set_packet_id(PacketID::IN);
m_dummy_qh->terminate_with_stray_descriptor(piix4_td_hack);
m_dummy_qh->terminate_element_link_ptr();
m_dummy_qh->attach_transfer_descriptor_chain(piix4_td_hack);
// Cyclically link to the full speed control QH to allow for full speed
// bandwidth reclamation during frame idle time
m_dummy_qh->link_next_queue_head(m_fullspeed_control_qh);
u32* framelist = reinterpret_cast<u32*>(m_framelist->vaddr().as_ptr());
for (int frame = 0; frame < UHCI_NUMBER_OF_FRAMES; frame++) {

6
Kernel/Bus/USB/UHCI/UHCIDescriptorTypes.h
View file

@ -296,12 +296,6 @@ struct alignas(16) QueueHead {
m_element_link_ptr = m_element_link_ptr | static_cast<u32>(LinkPointerBits::QHSelect);
}
void terminate_with_stray_descriptor(TransferDescriptor* td)
{
m_link_ptr = td->paddr();
m_link_ptr |= static_cast<u32>(LinkPointerBits::Terminate);
}
// TODO: Should we pass in an array or vector of TDs instead????
void attach_transfer_descriptor_chain(TransferDescriptor* td)
{