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Kernel: Move AHCIPort::ScatterList to VM::ScatterGatherList

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We want to move this out of the AHCI subsystem into the VM system,
since other parts of the kernel may need to perform scatter-gather IO.

We rename the current VM::ScatterGatherList impl that's used in the
virtio subsystem to VM::ScatterGatherRefList, since its distinguishing
feature from the AHCI scatter-gather list is that it doesn't own its
buffers.
This commit is contained in:
Sahan Fernando 2021-04-24 11:30:27 +10:00 • committed by Andreas Kling
parent b63b15eeb5
commit 8131c0de8c
11 changed files with 53 additions and 46 deletions
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2
Kernel/VirtIO/VirtIOQueue.cpp
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@ -48,7 +48,7 @@ void VirtIOQueue::disable_interrupts()
m_driver->flags = 1;
}
bool VirtIOQueue::supply_buffer(Badge<VirtIODevice>, const ScatterGatherList& scatter_list, BufferType buffer_type, void* token)
bool VirtIOQueue::supply_buffer(Badge<VirtIODevice>, const ScatterGatherRefList& scatter_list, BufferType buffer_type, void* token)
{
VERIFY(scatter_list.length() && scatter_list.length() <= m_free_buffers);
m_free_buffers -= scatter_list.length();