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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <unordered_map>
#include <vector>
#include "common/common_types.h"
#include "core/hle/kernel/writable_event.h"
#include "core/hle/service/nvdrv/nvdata.h"
#include "core/hle/service/nvdrv/syncpoint_manager.h"
#include "core/hle/service/service.h"
namespace Core {
class System;
}
namespace Service::NVFlinger {
class NVFlinger;
}
namespace Service::Nvidia {
class SyncpointManager;
namespace Devices {
class nvdevice;
}
/// Represents an Nvidia event
struct NvEvent {
Kernel::EventPair event;
Fence fence{};
};
struct EventInterface {
// Mask representing currently busy events
u64 events_mask{};
// Each kernel event associated to an NV event
std::array<NvEvent, MaxNvEvents> events;
// The status of the current NVEvent
std::array<EventState, MaxNvEvents> status{};
// Tells if an NVEvent is registered or not
std::array<bool, MaxNvEvents> registered{};
// When an NVEvent is waiting on GPU interrupt, this is the sync_point
// associated with it.
std::array<u32, MaxNvEvents> assigned_syncpt{};
// This is the value of the GPU interrupt for which the NVEvent is waiting
// for.
std::array<u32, MaxNvEvents> assigned_value{};
// Constant to denote an unasigned syncpoint.
static constexpr u32 unassigned_syncpt = 0xFFFFFFFF;
std::optional<u32> GetFreeEvent() const {
u64 mask = events_mask;
for (u32 i = 0; i < MaxNvEvents; i++) {
const bool is_free = (mask & 0x1) == 0;
if (is_free) {
if (status[i] == EventState::Registered || status[i] == EventState::Free) {
return {i};
}
}
mask = mask >> 1;
}
return std::nullopt;
}
void SetEventStatus(const u32 event_id, EventState new_status) {
EventState old_status = status[event_id];
if (old_status == new_status) {
return;
}
status[event_id] = new_status;
if (new_status == EventState::Registered) {
registered[event_id] = true;
}
if (new_status == EventState::Waiting || new_status == EventState::Busy) {
events_mask |= (1ULL << event_id);
}
}
void RegisterEvent(const u32 event_id) {
registered[event_id] = true;
if (status[event_id] == EventState::Free) {
status[event_id] = EventState::Registered;
}
}
void UnregisterEvent(const u32 event_id) {
registered[event_id] = false;
if (status[event_id] == EventState::Registered) {
status[event_id] = EventState::Free;
}
}
void LiberateEvent(const u32 event_id) {
status[event_id] = registered[event_id] ? EventState::Registered : EventState::Free;
events_mask &= ~(1ULL << event_id);
assigned_syncpt[event_id] = unassigned_syncpt;
assigned_value[event_id] = 0;
}
};
class Module final {
public:
Module(Core::System& system);
~Module();
/// Returns a pointer to one of the available devices, identified by its name.
template <typename T>
std::shared_ptr<T> GetDevice(const std::string& name) {
auto itr = devices.find(name);
if (itr == devices.end())
return nullptr;
return std::static_pointer_cast<T>(itr->second);
}
NvResult VerifyFD(DeviceFD fd) const;
/// Opens a device node and returns a file descriptor to it.
DeviceFD Open(const std::string& device_name);
/// Sends an ioctl command to the specified file descriptor.
NvResult Ioctl1(DeviceFD fd, Ioctl command, const std::vector<u8>& input,
std::vector<u8>& output);
NvResult Ioctl2(DeviceFD fd, Ioctl command, const std::vector<u8>& input,
const std::vector<u8>& inline_input, std::vector<u8>& output);
NvResult Ioctl3(DeviceFD fd, Ioctl command, const std::vector<u8>& input,
std::vector<u8>& output, std::vector<u8>& inline_output);
/// Closes a device file descriptor and returns operation success.
NvResult Close(DeviceFD fd);
void SignalSyncpt(const u32 syncpoint_id, const u32 value);
std::shared_ptr<Kernel::ReadableEvent> GetEvent(u32 event_id) const;
std::shared_ptr<Kernel::WritableEvent> GetEventWriteable(u32 event_id) const;
private:
/// Manages syncpoints on the host
SyncpointManager syncpoint_manager;
/// Id to use for the next open file descriptor.
DeviceFD next_fd = 1;
/// Mapping of file descriptors to the devices they reference.
std::unordered_map<DeviceFD, std::shared_ptr<Devices::nvdevice>> open_files;
/// Mapping of device node names to their implementation.
std::unordered_map<std::string, std::shared_ptr<Devices::nvdevice>> devices;
EventInterface events_interface;
};
/// Registers all NVDRV services with the specified service manager.
void InstallInterfaces(SM::ServiceManager& service_manager, NVFlinger::NVFlinger& nvflinger,
Core::System& system);
} // namespace Service::Nvidia
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