blob: f90876957a4840e9a83acbf20a193e9a83de5243 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/*
* 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/Memory/AnonymousVMObject.h>
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/PhysicalAddress.h>
namespace Kernel::Memory {
// A Scatter-Gather List type that owns its buffers
class ScatterGatherList : public RefCounted<ScatterGatherList> {
public:
static RefPtr<ScatterGatherList> try_create(AsyncBlockDeviceRequest&, Span<NonnullRefPtr<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;
};
}
|
