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Kernel/USB: Add UKBuffer variants of certain BulkPipe/Transfer functions

These will be useful for directly accessing the source/destination
buffers, without going through a third buffer first.
This commit is contained in:
Hendiadyoin1 2023-08-31 16:53:00 +02:00 committed by Andrew Kaster
parent 8335803045
commit 4b327bdc95
4 changed files with 43 additions and 0 deletions

View file

@ -6,6 +6,7 @@
#include <Kernel/Bus/USB/USBTransfer.h>
#include <Kernel/Library/StdLib.h>
#include <Kernel/Library/UserOrKernelBuffer.h>
#include <Kernel/Memory/MemoryManager.h>
namespace Kernel::USB {
@ -51,6 +52,13 @@ ErrorOr<void> Transfer::write_buffer(u16 len, void* data)
return {};
}
ErrorOr<void> Transfer::write_buffer(u16 len, UserOrKernelBuffer data)
{
VERIFY(len <= m_dma_buffer.size());
m_transfer_data_size = len;
return data.read(buffer().as_ptr(), len);
}
void Transfer::invoke_async_callback()
{
if (m_callback)