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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.h
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@ -38,7 +38,7 @@ public:
PhysicalAddress driver_area() const { return to_physical(m_driver.ptr()); }
PhysicalAddress device_area() const { return to_physical(m_device.ptr()); }
bool supply_buffer(Badge<VirtIODevice>, const ScatterGatherList&, BufferType, void* token);
bool supply_buffer(Badge<VirtIODevice>, const ScatterGatherRefList&, BufferType, void* token);
bool new_data_available() const;
bool can_write() const;
void* get_buffer(size_t*);