IPCHLE: improve HLE timing.

This change attempts to make calls to WII_IPC_HLE_Interface::Update()
more consistent.  We should be calling it whenever there is something we
can pop from a queue, and this patch does that.

DeviceUpdate() now works independently of Update(): it's now just a periodic
timer for devices which need to regularly update state.

With this change, we need a non-zero default delay for IPC replies because
replies are popped off the queue much more aggressively.

This fixes launching channels from the the System Menu.

Source/Core/Core/HW/SystemTimers.cpp

@@ -165,7 +165,7 @@ void IPC_HLE_UpdateCallback(u64 userdata, int cyclesLate)
 {
 	if (SConfig::GetInstance().m_LocalCoreStartupParameter.bWii)
 	{
-		WII_IPC_HLE_Interface::Update();
+		WII_IPC_HLE_Interface::UpdateDevices();
 		CoreTiming::ScheduleEvent(IPC_HLE_PERIOD - cyclesLate, et_IPC_HLE);
 	}
 }

Source/Core/Core/IPC_HLE/WII_IPC_HLE.cpp

@@ -76,9 +76,9 @@ IWII_IPC_HLE_Device* es_handles[ES_MAX_COUNT];
 typedef std::deque<u32> ipc_msg_queue;
 static ipc_msg_queue request_queue; // ppc -> arm
 static ipc_msg_queue reply_queue;   // arm -> ppc
-static std::mutex s_reply_queue;
 
 static int enque_reply;
+static int enque_request;
 
 static u64 last_reply_time;
 
@@ -87,8 +87,14 @@ static u64 last_reply_time;
 //       Please search for examples of this being called elsewhere.
 void EnqueReplyCallback(u64 userdata, int)
 {
-	std::lock_guard<std::mutex> lk(s_reply_queue);
 	reply_queue.push_back((u32)userdata);
+	Update();
+}
+
+void EnqueRequestCallback(u64 userdata, int)
+{
+	request_queue.push_back((u32)userdata);
+	Update();
 }
 
 void Init()
@@ -134,11 +140,13 @@ void Init()
 	g_DeviceMap[i] = new IWII_IPC_HLE_Device(i, "_Unimplemented_Device_"); i++;
 
 	enque_reply = CoreTiming::RegisterEvent("IPCReply", EnqueReplyCallback);
+	enque_request = CoreTiming::RegisterEvent("IPCRequest", EnqueRequestCallback);
 }
 
 void Reset(bool _bHard)
 {
 	CoreTiming::RemoveAllEvents(enque_reply);
+	CoreTiming::RemoveAllEvents(enque_request);
 
 	for (IWII_IPC_HLE_Device*& dev : g_FdMap)
 	{
@@ -175,12 +183,8 @@ void Reset(bool _bHard)
 		g_DeviceMap.erase(g_DeviceMap.begin(), g_DeviceMap.end());
 	}
 	request_queue.clear();
+	reply_queue.clear();
 
-	// lock due to using reply_queue
-	{
-		std::lock_guard<std::mutex> lk(s_reply_queue);
-		reply_queue.clear();
-	}
 	last_reply_time = 0;
 }
 
@@ -264,8 +268,6 @@ IWII_IPC_HLE_Device* CreateFileIO(u32 _DeviceID, const std::string& _rDeviceName
 
 void DoState(PointerWrap &p)
 {
-	std::lock_guard<std::mutex> lk(s_reply_queue);
-
 	p.Do(request_queue);
 	p.Do(reply_queue);
 	p.Do(last_reply_time);
@@ -537,6 +539,11 @@ void ExecuteCommand(u32 _Address)
 		// Ensure replies happen in order, fairly ugly
 		// Without this, tons of games fail now that DI commands have different reply delays
 		int reply_delay = pDevice ? pDevice->GetCmdDelay(_Address) : 0;
+		if (!reply_delay)
+		{
+			int delay_us = 250;
+			reply_delay = SystemTimers::GetTicksPerSecond() / 1000000 * delay_us;
+		}
 
 		const s64 ticks_til_last_reply = last_reply_time - CoreTiming::GetTicks();
 
@@ -555,7 +562,7 @@ void ExecuteCommand(u32 _Address)
 // Happens AS SOON AS IPC gets a new pointer!
 void EnqRequest(u32 _Address)
 {
-	request_queue.push_back(_Address);
+	CoreTiming::ScheduleEvent(1000, enque_request, _Address);
 }
 
 // Called when IOS module has some reply
@@ -567,6 +574,11 @@ void EnqReply(u32 _Address, int cycles_in_future)
 	CoreTiming::ScheduleEvent(cycles_in_future, enque_reply, _Address);
 }
 
+void EnqReply_Threadsafe(u32 _Address, int cycles_in_future)
+{
+	CoreTiming::ScheduleEvent_Threadsafe(cycles_in_future, enque_reply, _Address);
+}
+
 // This is called every IPC_HLE_PERIOD from SystemTimers.cpp
 // Takes care of routing ipc <-> ipc HLE
 void Update()
@@ -574,8 +586,6 @@ void Update()
 	if (!WII_IPCInterface::IsReady())
 		return;
 
-	UpdateDevices();
-
 	if (request_queue.size())
 	{
 		WII_IPCInterface::GenerateAck(request_queue.front());
@@ -583,21 +593,15 @@ void Update()
 		u32 command = request_queue.front();
 		request_queue.pop_front();
 		ExecuteCommand(command);
-
+		return;
-#if MAX_LOGLEVEL >= DEBUG_LEVEL
-		Dolphin_Debugger::PrintCallstack(LogTypes::WII_IPC_HLE, LogTypes::LDEBUG);
-#endif
 	}
 
-	// lock due to using reply_queue
+	if (reply_queue.size())
 	{
-		std::lock_guard<std::mutex> lk(s_reply_queue);
+		WII_IPCInterface::GenerateReply(reply_queue.front());
-		if (reply_queue.size())
+		INFO_LOG(WII_IPC_HLE, "<<-- Reply to IPC Request @ 0x%08x", reply_queue.front());
-		{
+		reply_queue.pop_front();
-			WII_IPCInterface::GenerateReply(reply_queue.front());
+		return;
-			INFO_LOG(WII_IPC_HLE, "<<-- Reply to IPC Request @ 0x%08x", reply_queue.front());
-			reply_queue.pop_front();
-		}
 	}
 }
 
@@ -606,9 +610,9 @@ void UpdateDevices()
 	// Check if a hardware device must be updated
 	for (const auto& entry : g_DeviceMap)
 	{
-		if (entry.second->IsOpened() && entry.second->Update())
+		if (entry.second->IsOpened())
 		{
-			break;
+			entry.second->Update();
 		}
 	}
 }

Source/Core/Core/IPC_HLE/WII_IPC_HLE.h

@@ -29,8 +29,6 @@ namespace WII_IPC_HLE_Interface
 #define IPC_FIRST_ID  0x00 // First IPC device ID
 #define IPC_MAX_FILES 0x10 // First IPC file ID
 
-void EnqueReplyCallback(u64 userdata, int =0);
-
 // Init
 void Init();
 
@@ -66,5 +64,6 @@ void ExecuteCommand(u32 _Address);
 
 void EnqRequest(u32 _Address);
 void EnqReply(u32 _Address, int cycles_in_future = 0);
+void EnqReply_Threadsafe(u32 _Address, int cycles_in_future = 0);
 
 } // end of namespace WII_IPC_HLE_Interface

Source/Core/Core/IPC_HLE/WII_IPC_HLE_Device_hid.cpp

@@ -37,7 +37,7 @@ void CWII_IPC_HLE_Device_hid::checkUsbUpdates(CWII_IPC_HLE_Device_hid* hid)
 				// Return value
 				Memory::Write_U32(0, hid->deviceCommandAddress + 4);
 
-				WII_IPC_HLE_Interface::EnqueReplyCallback(hid->deviceCommandAddress);
+				WII_IPC_HLE_Interface::EnqReply_Threadsafe(hid->deviceCommandAddress);
 				hid->deviceCommandAddress = 0;
 			}
 		}
@@ -65,7 +65,7 @@ void CWII_IPC_HLE_Device_hid::handleUsbUpdates(struct libusb_transfer *transfer)
 	// Return value
 	Memory::Write_U32(ret, replyAddress + 4);
 
-	WII_IPC_HLE_Interface::EnqueReplyCallback(replyAddress);
+	WII_IPC_HLE_Interface::EnqReply_Threadsafe(replyAddress);
 	//DEBUG_LOG(WII_IPC_HID, "OMG OMG OMG I GOT A CALLBACK, IMMA BE FAMOUS %d %d %d", transfer->actual_length, transfer->length, transfer->status);
 }
 
@@ -124,13 +124,6 @@ bool CWII_IPC_HLE_Device_hid::Close(u32 _CommandAddress, bool _bForce)
 	return true;
 }
 
-u32 CWII_IPC_HLE_Device_hid::Update()
-{
-
-	u32 work_done = 0;
-	return work_done;
-}
-
 bool CWII_IPC_HLE_Device_hid::IOCtl(u32 _CommandAddress)
 {
 	u32 Parameter     = Memory::Read_U32(_CommandAddress + 0xC);
@@ -256,7 +249,7 @@ bool CWII_IPC_HLE_Device_hid::IOCtl(u32 _CommandAddress)
 
 			// Return value
 			Memory::Write_U32(-1, deviceCommandAddress + 4);
-			WII_IPC_HLE_Interface::EnqueReplyCallback(deviceCommandAddress);
+			WII_IPC_HLE_Interface::EnqReply(deviceCommandAddress);
 			deviceCommandAddress = 0;
 		}
 		DEBUG_LOG(WII_IPC_HID, "HID::IOCtl(Shutdown) (BufferIn: (%08x, %i), BufferOut: (%08x, %i)",

Source/Core/Core/IPC_HLE/WII_IPC_HLE_Device_hid.h

@@ -27,7 +27,6 @@ public:
 
 	virtual bool Open(u32 _CommandAddress, u32 _Mode) override;
 	virtual bool Close(u32 _CommandAddress, bool _bForce) override;
-	virtual u32 Update() override;
 
 	virtual bool IOCtlV(u32 _CommandAddress) override;
 	virtual bool IOCtl(u32 _CommandAddress) override;