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https://github.com/RGBCube/serenity
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3fb289e27d
Instead, hold the lock while we copy the contents to a stack-based Vector then iterate on it without any locking. Because we rely on heap allocations, we need to propagate errors back in case of OOM condition, therefore, both PCI::enumerate API function and PCI::Access::add_host_controller_and_enumerate_attached_devices use now a ErrorOr<void> return value to propagate errors. OOM Error can only occur when enumerating the m_device_identifiers vector under a spinlock and trying to expand the temporary Vector which will be used locklessly to actually iterate over the PCI::DeviceIdentifiers objects.
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/Try.h>
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#include <Kernel/Bus/PCI/Definitions.h>
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namespace Kernel::PCI {
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void write8(Address address, PCI::RegisterOffset field, u8 value);
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void write16(Address address, PCI::RegisterOffset field, u16 value);
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void write32(Address address, PCI::RegisterOffset field, u32 value);
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u8 read8(Address address, PCI::RegisterOffset field);
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u16 read16(Address address, PCI::RegisterOffset field);
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u32 read32(Address address, PCI::RegisterOffset field);
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HardwareID get_hardware_id(PCI::Address);
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bool is_io_space_enabled(Address);
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ErrorOr<void> enumerate(Function<void(DeviceIdentifier const&)> callback);
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void enable_interrupt_line(Address);
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void disable_interrupt_line(Address);
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void raw_access(Address, u32, size_t, u32);
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u32 get_BAR0(Address);
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u32 get_BAR1(Address);
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u32 get_BAR2(Address);
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u32 get_BAR3(Address);
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u32 get_BAR4(Address);
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u32 get_BAR5(Address);
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u32 get_BAR(Address address, u8 bar);
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size_t get_BAR_space_size(Address, u8);
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void enable_bus_mastering(Address);
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void disable_bus_mastering(Address);
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void enable_io_space(Address);
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void disable_io_space(Address);
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void enable_memory_space(Address);
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void disable_memory_space(Address);
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DeviceIdentifier get_device_identifier(Address address);
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}
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