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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Forward.h>
#include <Kernel/Memory/AllocationStrategy.h>
#include <Kernel/Memory/AnonymousVMObject.h>
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/Memory/PageFaultResponse.h>
#include <Kernel/PhysicalAddress.h>
namespace Kernel::Memory {
class SharedFramebufferVMObject final : public VMObject {
public:
class FakeWritesFramebufferVMObject final : public VMObject {
public:
static ErrorOr<NonnullLockRefPtr<FakeWritesFramebufferVMObject>> try_create(Badge<SharedFramebufferVMObject>, SharedFramebufferVMObject const& parent_object);
private:
FakeWritesFramebufferVMObject(SharedFramebufferVMObject const& parent_object, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages)
: VMObject(move(new_physical_pages))
, m_parent_object(parent_object)
{
}
virtual StringView class_name() const override { return "FakeWritesFramebufferVMObject"sv; }
virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override { return Error::from_errno(ENOTIMPL); }
virtual ReadonlySpan<RefPtr<PhysicalPage>> physical_pages() const override { return m_parent_object->fake_sink_framebuffer_physical_pages(); }
virtual Span<RefPtr<PhysicalPage>> physical_pages() override { return m_parent_object->fake_sink_framebuffer_physical_pages(); }
NonnullLockRefPtr<SharedFramebufferVMObject> m_parent_object;
};
class RealWritesFramebufferVMObject final : public VMObject {
public:
static ErrorOr<NonnullLockRefPtr<RealWritesFramebufferVMObject>> try_create(Badge<SharedFramebufferVMObject>, SharedFramebufferVMObject const& parent_object);
private:
RealWritesFramebufferVMObject(SharedFramebufferVMObject const& parent_object, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages)
: VMObject(move(new_physical_pages))
, m_parent_object(parent_object)
{
}
virtual StringView class_name() const override { return "RealWritesFramebufferVMObject"sv; }
virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override { return Error::from_errno(ENOTIMPL); }
virtual ReadonlySpan<RefPtr<PhysicalPage>> physical_pages() const override { return m_parent_object->real_framebuffer_physical_pages(); }
virtual Span<RefPtr<PhysicalPage>> physical_pages() override { return m_parent_object->real_framebuffer_physical_pages(); }
NonnullLockRefPtr<SharedFramebufferVMObject> m_parent_object;
};
virtual ~SharedFramebufferVMObject() override = default;
static ErrorOr<NonnullLockRefPtr<SharedFramebufferVMObject>> try_create_for_physical_range(PhysicalAddress paddr, size_t size);
static ErrorOr<NonnullLockRefPtr<SharedFramebufferVMObject>> try_create_at_arbitrary_physical_range(size_t size);
virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override { return Error::from_errno(ENOTIMPL); }
void switch_to_fake_sink_framebuffer_writes(Badge<Kernel::DisplayConnector>);
void switch_to_real_framebuffer_writes(Badge<Kernel::DisplayConnector>);
virtual ReadonlySpan<RefPtr<PhysicalPage>> physical_pages() const override;
virtual Span<RefPtr<PhysicalPage>> physical_pages() override;
Span<RefPtr<PhysicalPage>> fake_sink_framebuffer_physical_pages();
ReadonlySpan<RefPtr<PhysicalPage>> fake_sink_framebuffer_physical_pages() const;
Span<RefPtr<PhysicalPage>> real_framebuffer_physical_pages();
ReadonlySpan<RefPtr<PhysicalPage>> real_framebuffer_physical_pages() const;
FakeWritesFramebufferVMObject const& fake_writes_framebuffer_vmobject() const { return *m_fake_writes_framebuffer_vmobject; }
FakeWritesFramebufferVMObject& fake_writes_framebuffer_vmobject() { return *m_fake_writes_framebuffer_vmobject; }
RealWritesFramebufferVMObject const& real_writes_framebuffer_vmobject() const { return *m_real_writes_framebuffer_vmobject; }
RealWritesFramebufferVMObject& real_writes_framebuffer_vmobject() { return *m_real_writes_framebuffer_vmobject; }
private:
SharedFramebufferVMObject(FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, CommittedPhysicalPageSet, AnonymousVMObject& real_framebuffer_vmobject);
virtual StringView class_name() const override { return "SharedFramebufferVMObject"sv; }
ErrorOr<void> create_fake_writes_framebuffer_vm_object();
ErrorOr<void> create_real_writes_framebuffer_vm_object();
NonnullLockRefPtr<AnonymousVMObject> m_real_framebuffer_vmobject;
LockRefPtr<FakeWritesFramebufferVMObject> m_fake_writes_framebuffer_vmobject;
LockRefPtr<RealWritesFramebufferVMObject> m_real_writes_framebuffer_vmobject;
bool m_writes_are_faked { false };
mutable RecursiveSpinlock<LockRank::None> m_writes_state_lock {};
CommittedPhysicalPageSet m_committed_pages;
};
}
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