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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Bitmap.h>
#include <AK/String.h>
#include <AK/Vector.h>
#include <Kernel/Bus/PCI/Definitions.h>
#include <Kernel/FileSystem/SysFS.h>
namespace Kernel::PCI {
class PCIBusSysFSDirectory final : public SysFSDirectory {
public:
static void initialize();
private:
PCIBusSysFSDirectory();
};
class PCIDeviceSysFSDirectory final : public SysFSDirectory {
public:
static NonnullRefPtr<PCIDeviceSysFSDirectory> create(const SysFSDirectory&, Address);
const Address& address() const { return m_address; }
private:
PCIDeviceSysFSDirectory(const SysFSDirectory&, Address);
Address m_address;
};
class PCIDeviceAttributeSysFSComponent : public SysFSComponent {
public:
static NonnullRefPtr<PCIDeviceAttributeSysFSComponent> create(String name, const PCIDeviceSysFSDirectory& device, size_t offset, size_t field_bytes_width);
virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, FileDescription*) const override;
virtual ~PCIDeviceAttributeSysFSComponent() {};
virtual size_t size() const override;
protected:
virtual OwnPtr<KBuffer> try_to_generate_buffer() const;
PCIDeviceAttributeSysFSComponent(String name, const PCIDeviceSysFSDirectory& device, size_t offset, size_t field_bytes_width);
NonnullRefPtr<PCIDeviceSysFSDirectory> m_device;
size_t m_offset;
size_t m_field_bytes_width;
};
class Access {
public:
void enumerate(Function<void(Address, ID)>&) const;
void enumerate_bus(int type, u8 bus, Function<void(Address, ID)>&, bool recursive);
void enumerate_functions(int type, u8 bus, u8 device, u8 function, Function<void(Address, ID)>& callback, bool recursive);
void enumerate_device(int type, u8 bus, u8 device, Function<void(Address, ID)>& callback, bool recursive);
static Access& the();
static bool is_initialized();
virtual uint32_t segment_count() const = 0;
virtual uint8_t segment_start_bus(u32 segment) const = 0;
virtual uint8_t segment_end_bus(u32 segment) const = 0;
virtual void write8_field(Address address, u32 field, u8 value) = 0;
virtual void write16_field(Address address, u32 field, u16 value) = 0;
virtual void write32_field(Address address, u32 field, u32 value) = 0;
virtual u8 read8_field(Address address, u32 field) = 0;
virtual u16 read16_field(Address address, u32 field) = 0;
virtual u32 read32_field(Address address, u32 field) = 0;
PhysicalID get_physical_id(Address address) const;
protected:
virtual void enumerate_hardware(Function<void(Address, ID)>) = 0;
u8 early_read8_field(Address address, u32 field);
u16 early_read16_field(Address address, u32 field);
u32 early_read32_field(Address address, u32 field);
u16 early_read_type(Address address);
Access();
virtual ~Access() = default;
Vector<PhysicalID> m_physical_ids;
Bitmap m_enumerated_buses;
};
}
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