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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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4
Kernel/Bus/USB/USBPipe.h
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@ -18,6 +18,8 @@ namespace Kernel::USB {
class USBController;
class Transfer;
using USBAsyncCallback = Function<void(Transfer* transfer)>;
//
// A pipe is the logical connection between a memory buffer on the PC (host) and
// an endpoint on the device. In this implementation, the data buffer the pipe connects
@ -111,6 +113,8 @@ class InterruptInPipe : public Pipe {
public:
static ErrorOr<NonnullOwnPtr<InterruptInPipe>> create(USBController const& controller, u8 endpoint_address, u16 max_packet_size, i8 device_address, u16 poll_interval, size_t buffer_size = PAGE_SIZE);
ErrorOr<NonnullLockRefPtr<Transfer>> interrupt_in_transfer(size_t length, u16 ms_interval, USBAsyncCallback callback);
u16 poll_interval() const { return m_poll_interval; }
private: