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86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
/*
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* Copyright (c) 2020, 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/Bitmap.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <Kernel/Bus/PCI/Definitions.h>
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#include <Kernel/FileSystem/SysFS.h>
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namespace Kernel::PCI {
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class Access {
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public:
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enum class AccessType {
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IO,
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Memory,
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};
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public:
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static bool initialize_for_memory_access(PhysicalAddress mcfg_table);
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static bool initialize_for_io_access();
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void fast_enumerate(Function<void(Address, PhysicalID const&)>&) const;
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void rescan_hardware();
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static Access& the();
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static bool is_initialized();
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void write8_field(Address address, u32 field, u8 value);
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void write16_field(Address address, u32 field, u16 value);
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void write32_field(Address address, u32 field, u32 value);
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u8 read8_field(Address address, u32 field);
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u16 read16_field(Address address, u32 field);
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u32 read32_field(Address address, u32 field);
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PhysicalID get_physical_id(Address address) const;
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private:
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void enumerate_bus(int type, u8 bus, bool recursive);
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void enumerate_functions(int type, u8 bus, u8 device, u8 function, bool recursive);
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void enumerate_device(int type, u8 bus, u8 device, bool recursive);
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explicit Access(AccessType);
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bool scan_pci_domains(PhysicalAddress mcfg);
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Vector<Capability> get_capabilities(Address);
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Optional<u8> get_capabilities_pointer(Address address);
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// IO access (legacy) operations
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u8 io_read8_field(Address address, u32 field);
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u16 io_read16_field(Address address, u32 field);
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u32 io_read32_field(Address address, u32 field);
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void io_write8_field(Address address, u32, u8);
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void io_write16_field(Address address, u32, u16);
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void io_write32_field(Address address, u32, u32);
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u16 io_read_type(Address address);
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// Memory-mapped access operations
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void map_bus_region(u32 domain, u8 bus);
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u8 memory_read8_field(Address address, u32 field);
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u16 memory_read16_field(Address address, u32 field);
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u32 memory_read32_field(Address address, u32 field);
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void memory_write8_field(Address address, u32, u8);
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void memory_write16_field(Address address, u32, u16);
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void memory_write32_field(Address address, u32, u32);
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u16 memory_read_type(Address address);
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VirtualAddress get_device_configuration_memory_mapped_space(Address address);
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Optional<PhysicalAddress> determine_memory_mapped_bus_base_address(u32 domain, u8 bus) const;
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// Data-members for accessing Memory mapped PCI devices' configuration spaces
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u8 m_mapped_bus { 0 };
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OwnPtr<Memory::Region> m_mapped_bus_region;
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HashMap<u32, PCI::Domain> m_domains;
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// General Data-members
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mutable Mutex m_access_lock;
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mutable Mutex m_scan_lock;
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Bitmap m_enumerated_buses;
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AccessType m_access_type;
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Vector<PhysicalID> m_physical_ids;
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};
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}
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