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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/HashMap.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/Try.h>
#include <AK/Vector.h>
#include <Kernel/Bus/PCI/Controller/HostController.h>
#include <Kernel/Bus/PCI/Definitions.h>
#include <Kernel/Locking/Spinlock.h>
namespace Kernel::PCI {
class Access {
public:
static bool initialize_for_multiple_pci_domains(PhysicalAddress mcfg_table);
#if ARCH(I386) || ARCH(X86_64)
static bool initialize_for_one_pci_domain();
#endif
ErrorOr<void> fast_enumerate(Function<void(DeviceIdentifier const&)>&) const;
void rescan_hardware();
static Access& the();
static bool is_initialized();
static bool is_disabled();
static bool is_hardware_disabled();
void write8_field(Address address, u32 field, u8 value);
void write16_field(Address address, u32 field, u16 value);
void write32_field(Address address, u32 field, u32 value);
u8 read8_field(Address address, u32 field);
u16 read16_field(Address address, u32 field);
u32 read32_field(Address address, u32 field);
DeviceIdentifier get_device_identifier(Address address) const;
Spinlock const& scan_lock() const { return m_scan_lock; }
RecursiveSpinlock const& access_lock() const { return m_access_lock; }
ErrorOr<void> add_host_controller_and_enumerate_attached_devices(NonnullOwnPtr<HostController>, Function<void(DeviceIdentifier const&)> callback);
private:
u8 read8_field(Address address, RegisterOffset field);
u16 read16_field(Address address, RegisterOffset field);
void add_host_controller(NonnullOwnPtr<HostController>);
bool find_and_register_pci_host_bridges_from_acpi_mcfg_table(PhysicalAddress mcfg);
Access();
Vector<Capability> get_capabilities(Address);
Optional<u8> get_capabilities_pointer(Address address);
mutable RecursiveSpinlock m_access_lock { LockRank::None };
mutable Spinlock m_scan_lock { LockRank::None };
HashMap<u32, NonnullOwnPtr<PCI::HostController>> m_host_controllers;
Vector<DeviceIdentifier> m_device_identifiers;
};
}
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