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Kernel: Use RefPtr instead of LockRefPtr for PhysicalPage

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I believe this to be safe, as the main thing that LockRefPtr provides
over RefPtr is safe copying from a shared LockRefPtr instance. I've
inspected the uses of RefPtr<PhysicalPage> and it seems they're all
guarded by external locking. Some of it is less obvious, but this is
an area where we're making continuous headway.
This commit is contained in:
Andreas Kling 2022-08-24 15:56:26 +02:00
parent 5a804b9a1d
commit 2c72d495a3
33 changed files with 141 additions and 138 deletions
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4
Kernel/Storage/ATA/AHCI/Port.cpp
View file

@ -54,7 +54,7 @@ ErrorOr<void> AHCIPort::allocate_resources_and_initialize_ports()
return {};
}
UNMAP_AFTER_INIT AHCIPort::AHCIPort(AHCIController const& controller, NonnullLockRefPtr<Memory::PhysicalPage> identify_buffer_page, AHCI::HBADefinedCapabilities hba_capabilities, volatile AHCI::PortRegisters& registers, u32 port_index)
UNMAP_AFTER_INIT AHCIPort::AHCIPort(AHCIController const& controller, NonnullRefPtr<Memory::PhysicalPage> identify_buffer_page, AHCI::HBADefinedCapabilities hba_capabilities, volatile AHCI::PortRegisters& registers, u32 port_index)
: m_port_index(port_index)
, m_hba_capabilities(hba_capabilities)
, m_identify_buffer_page(move(identify_buffer_page))
@ -496,7 +496,7 @@ Optional<AsyncDeviceRequest::RequestResult> AHCIPort::prepare_and_set_scatter_li
VERIFY(m_lock.is_locked());
VERIFY(request.block_count() > 0);
NonnullLockRefPtrVector<Memory::PhysicalPage> allocated_dma_regions;
NonnullRefPtrVector<Memory::PhysicalPage> allocated_dma_regions;
for (size_t index = 0; index < calculate_descriptors_count(request.block_count()); index++) {
allocated_dma_regions.append(m_dma_buffers.at(index));
}

15
Kernel/Storage/ATA/AHCI/Port.h
View file

@ -6,10 +6,11 @@
#pragma once
#include <AK/NonnullRefPtrVector.h>
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <Kernel/Devices/Device.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Library/LockRefPtr.h>
#include <Kernel/Library/LockWeakPtr.h>
#include <Kernel/Library/LockWeakable.h>
#include <Kernel/Locking/Mutex.h>
@ -56,7 +57,7 @@ private:
bool is_phy_enabled() const { return (m_port_registers.ssts & 0xf) == 3; }
bool initialize();
AHCIPort(AHCIController const&, NonnullLockRefPtr<Memory::PhysicalPage> identify_buffer_page, AHCI::HBADefinedCapabilities, volatile AHCI::PortRegisters&, u32 port_index);
AHCIPort(AHCIController const&, NonnullRefPtr<Memory::PhysicalPage> identify_buffer_page, AHCI::HBADefinedCapabilities, volatile AHCI::PortRegisters&, u32 port_index);
ALWAYS_INLINE void clear_sata_error_register() const;
@ -111,11 +112,11 @@ private:
mutable bool m_wait_for_completion { false };
NonnullLockRefPtrVector<Memory::PhysicalPage> m_dma_buffers;
NonnullLockRefPtrVector<Memory::PhysicalPage> m_command_table_pages;
LockRefPtr<Memory::PhysicalPage> m_command_list_page;
NonnullRefPtrVector<Memory::PhysicalPage> m_dma_buffers;
NonnullRefPtrVector<Memory::PhysicalPage> m_command_table_pages;
RefPtr<Memory::PhysicalPage> m_command_list_page;
OwnPtr<Memory::Region> m_command_list_region;
LockRefPtr<Memory::PhysicalPage> m_fis_receive_page;
RefPtr<Memory::PhysicalPage> m_fis_receive_page;
LockRefPtr<ATADevice> m_connected_device;
u32 m_port_index;
@ -125,7 +126,7 @@ private:
// it's probably better to just "cache" this here instead.
AHCI::HBADefinedCapabilities const m_hba_capabilities;
NonnullLockRefPtr<Memory::PhysicalPage> m_identify_buffer_page;
NonnullRefPtr<Memory::PhysicalPage> m_identify_buffer_page;
volatile AHCI::PortRegisters& m_port_registers;
LockWeakPtr<AHCIController> m_parent_controller;