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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Vector.h>
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/VM/AnonymousVMObject.h>
#include <Kernel/VM/MemoryManager.h>
namespace Kernel {
/// A Scatter-Gather List type that owns its buffers
class ScatterGatherList : public RefCounted<ScatterGatherList> {
public:
static RefPtr<ScatterGatherList> create(AsyncBlockDeviceRequest&, NonnullRefPtrVector<PhysicalPage> allocated_pages, size_t device_block_size);
const VMObject& vmobject() const { return m_vm_object; }
VirtualAddress dma_region() const { return m_dma_region->vaddr(); }
size_t scatters_count() const { return m_vm_object->physical_pages().size(); }
private:
ScatterGatherList(NonnullRefPtr<AnonymousVMObject>, AsyncBlockDeviceRequest&, size_t device_block_size);
NonnullRefPtr<AnonymousVMObject> m_vm_object;
OwnPtr<Region> m_dma_region;
};
}
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