mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 17:12:43 +00:00
277 lines
7.5 KiB
C++
277 lines
7.5 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/Function.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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#include <Kernel/Debug.h>
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namespace Kernel {
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#define PCI_VENDOR_ID 0x00 // word
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#define PCI_DEVICE_ID 0x02 // word
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#define PCI_COMMAND 0x04 // word
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#define PCI_STATUS 0x06 // word
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#define PCI_REVISION_ID 0x08 // byte
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#define PCI_PROG_IF 0x09 // byte
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#define PCI_SUBCLASS 0x0a // byte
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#define PCI_CLASS 0x0b // byte
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#define PCI_CACHE_LINE_SIZE 0x0c // byte
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#define PCI_LATENCY_TIMER 0x0d // byte
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#define PCI_HEADER_TYPE 0x0e // byte
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#define PCI_BIST 0x0f // byte
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#define PCI_BAR0 0x10 // u32
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#define PCI_BAR1 0x14 // u32
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#define PCI_BAR2 0x18 // u32
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#define PCI_BAR3 0x1C // u32
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#define PCI_BAR4 0x20 // u32
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#define PCI_BAR5 0x24 // u32
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#define PCI_SUBSYSTEM_ID 0x2C // u16
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#define PCI_SUBSYSTEM_VENDOR_ID 0x2E // u16
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#define PCI_CAPABILITIES_POINTER 0x34 // u8
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#define PCI_INTERRUPT_LINE 0x3C // byte
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#define PCI_SECONDARY_BUS 0x19 // byte
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#define PCI_HEADER_TYPE_DEVICE 0
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#define PCI_HEADER_TYPE_BRIDGE 1
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#define PCI_TYPE_BRIDGE 0x0604
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#define PCI_ADDRESS_PORT 0xCF8
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#define PCI_VALUE_PORT 0xCFC
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#define PCI_NONE 0xFFFF
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#define PCI_MAX_DEVICES_PER_BUS 32
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#define PCI_MAX_BUSES 256
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#define PCI_MAX_FUNCTIONS_PER_DEVICE 8
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#define PCI_CAPABILITY_NULL 0x0
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#define PCI_CAPABILITY_MSI 0x5
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#define PCI_CAPABILITY_VENDOR_SPECIFIC 0x9
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#define PCI_CAPABILITY_MSIX 0x11
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namespace PCI {
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struct ID {
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u16 vendor_id { 0 };
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u16 device_id { 0 };
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bool is_null() const { return !vendor_id && !device_id; }
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bool operator==(const ID& other) const
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{
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return vendor_id == other.vendor_id && device_id == other.device_id;
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}
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bool operator!=(const ID& other) const
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{
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return vendor_id != other.vendor_id || device_id != other.device_id;
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}
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};
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struct Address {
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public:
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Address() = default;
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Address(u16 seg)
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: m_seg(seg)
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, m_bus(0)
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, m_device(0)
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, m_function(0)
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{
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}
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Address(u16 seg, u8 bus, u8 device, u8 function)
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: m_seg(seg)
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, m_bus(bus)
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, m_device(device)
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, m_function(function)
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{
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}
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Address(const Address& address)
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: m_seg(address.seg())
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, m_bus(address.bus())
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, m_device(address.device())
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, m_function(address.function())
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{
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}
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bool is_null() const { return !m_bus && !m_device && !m_function; }
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operator bool() const { return !is_null(); }
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// Disable default implementations that would use surprising integer promotion.
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bool operator<=(const Address&) const = delete;
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bool operator>=(const Address&) const = delete;
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bool operator<(const Address&) const = delete;
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bool operator>(const Address&) const = delete;
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bool operator==(const Address& other) const
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{
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if (this == &other)
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return true;
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return m_seg == other.m_seg && m_bus == other.m_bus && m_device == other.m_device && m_function == other.m_function;
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}
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bool operator!=(const Address& other) const
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{
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return !(*this == other);
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}
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u16 seg() const { return m_seg; }
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u8 bus() const { return m_bus; }
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u8 device() const { return m_device; }
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u8 function() const { return m_function; }
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u32 io_address_for_field(u8 field) const
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{
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return 0x80000000u | (m_bus << 16u) | (m_device << 11u) | (m_function << 8u) | (field & 0xfc);
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}
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protected:
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u32 m_seg { 0 };
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u8 m_bus { 0 };
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u8 m_device { 0 };
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u8 m_function { 0 };
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};
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struct ChangeableAddress : public Address {
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ChangeableAddress()
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: Address(0)
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{
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}
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explicit ChangeableAddress(u16 seg)
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: Address(seg)
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{
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}
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ChangeableAddress(u16 seg, u8 bus, u8 device, u8 function)
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: Address(seg, bus, device, function)
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{
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}
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void set_seg(u16 seg) { m_seg = seg; }
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void set_bus(u8 bus) { m_bus = bus; }
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void set_device(u8 device) { m_device = device; }
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void set_function(u8 function) { m_function = function; }
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bool operator==(const Address& address)
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{
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if (m_seg == address.seg() && m_bus == address.bus() && m_device == address.device() && m_function == address.function())
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return true;
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else
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return false;
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}
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const ChangeableAddress& operator=(const Address& address)
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{
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set_seg(address.seg());
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set_bus(address.bus());
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set_device(address.device());
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set_function(address.function());
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return *this;
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}
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};
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class Capability {
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public:
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Capability(const Address& address, u8 id, u8 ptr)
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: m_address(address)
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, m_id(id)
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, m_ptr(ptr)
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{
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}
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u8 id() const { return m_id; }
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u8 read8(u32) const;
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u16 read16(u32) const;
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u32 read32(u32) const;
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void write8(u32, u8);
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void write16(u32, u16);
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void write32(u32, u32);
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private:
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Address m_address;
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const u8 m_id;
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const u8 m_ptr;
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};
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class PhysicalID {
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public:
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PhysicalID(Address address, ID id, Vector<Capability> capabilities)
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: m_address(address)
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, m_id(id)
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, m_capabilities(capabilities)
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{
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if constexpr (PCI_DEBUG) {
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for (const auto& capability : capabilities)
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dbgln("{} has capability {}", address, capability.id());
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}
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}
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Vector<Capability> capabilities() const { return m_capabilities; }
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const ID& id() const { return m_id; }
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const Address& address() const { return m_address; }
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private:
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Address m_address;
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ID m_id;
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Vector<Capability> m_capabilities;
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};
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ID get_id(PCI::Address);
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bool is_io_space_enabled(Address);
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void enumerate(Function<void(Address, ID)> callback);
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void enable_interrupt_line(Address);
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void disable_interrupt_line(Address);
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u8 get_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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u8 get_revision_id(Address);
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u8 get_programming_interface(Address);
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u8 get_subclass(Address);
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u8 get_class(Address);
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u16 get_subsystem_id(Address);
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u16 get_subsystem_vendor_id(Address);
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size_t get_BAR_space_size(Address, u8);
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Optional<u8> get_capabilities_pointer(Address);
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Vector<Capability> get_capabilities(Address);
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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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PhysicalID get_physical_id(Address address);
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class Access;
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class MMIOAccess;
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class WindowedMMIOAccess;
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class IOAccess;
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class MMIOSegment;
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class DeviceController;
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class Device;
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}
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}
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template<>
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struct AK::Formatter<Kernel::PCI::Address> : Formatter<FormatString> {
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void format(FormatBuilder& builder, Kernel::PCI::Address value)
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{
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return Formatter<FormatString>::format(
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builder,
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"PCI [{:04x}:{:02x}:{:02x}:{:02x}]", value.seg(), value.bus(), value.device(), value.function());
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}
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};
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template<>
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struct AK::Formatter<Kernel::PCI::ID> : Formatter<FormatString> {
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void format(FormatBuilder& builder, Kernel::PCI::ID value)
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{
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return Formatter<FormatString>::format(
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builder,
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"PCI::ID [{:04x}:{:04x}]", value.vendor_id, value.device_id);
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}
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};
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