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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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11
Kernel/Bus/USB/UHCI/UHCIController.h
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@ -31,7 +31,6 @@ class UHCIController final
static constexpr u8 MAXIMUM_NUMBER_OF_TDS = 128; // Upper pool limit. This consumes the second page we have allocated
static constexpr u8 MAXIMUM_NUMBER_OF_QHS = 64;
static constexpr u8 NUMBER_OF_INTERRUPT_QHS = 11;
public:
static constexpr u8 NUMBER_OF_ROOT_PORTS = 2;
@ -44,10 +43,16 @@ public:
virtual ErrorOr<void> reset() override;
virtual ErrorOr<void> stop() override;
virtual ErrorOr<void> start() override;
ErrorOr<void> spawn_async_poll_process();
ErrorOr<void> spawn_port_process();
ErrorOr<QueueHead*> create_transfer_queue(Transfer& transfer);
ErrorOr<void> submit_async_transfer(NonnullOwnPtr<AsyncTransferHandle> async_handle, QueueHead* anchor, QueueHead* transfer_queue);
virtual void cancel_async_transfer(NonnullLockRefPtr<Transfer> transfer) override;
virtual ErrorOr<size_t> submit_control_transfer(Transfer& transfer) override;
virtual ErrorOr<size_t> submit_bulk_transfer(Transfer& transfer) override;
virtual ErrorOr<void> submit_async_interrupt_transfer(NonnullLockRefPtr<Transfer> transfer, u16 ms_interval) override;
void get_port_status(Badge<UHCIRootHub>, u8, HubStatus&);
ErrorOr<void> set_port_feature(Badge<UHCIRootHub>, u8, HubFeatureSelector);
@ -95,15 +100,17 @@ private:
NonnullOwnPtr<IOWindow> m_registers_io_window;
Spinlock m_async_lock;
Spinlock m_schedule_lock;
OwnPtr<UHCIRootHub> m_root_hub;
OwnPtr<UHCIDescriptorPool<QueueHead>> m_queue_head_pool;
OwnPtr<UHCIDescriptorPool<TransferDescriptor>> m_transfer_descriptor_pool;
Vector<TransferDescriptor*> m_iso_td_list;
Array<OwnPtr<AsyncTransferHandle>, MAXIMUM_NUMBER_OF_QHS> m_active_async_transfers;
QueueHead* m_schedule_begin_anchor;
Array<QueueHead*, NUMBER_OF_INTERRUPT_QHS> m_interrupt_qh_anchor_arr;
QueueHead* m_interrupt_qh_anchor;
QueueHead* m_ls_control_qh_anchor;
QueueHead* m_fs_control_qh_anchor;
// Always final queue in the schedule, may loop back to previous QH for bandwidth