From a45643cb3b07e76e73814baf1d472d636dd2cd91 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Fri, 7 Jun 2019 21:13:20 -0400
Subject: [PATCH] nv_services: Stub CtrlEventSignal

---
 .../hle/service/nvdrv/devices/nvhost_ctrl.cpp | 44 ++++++++++++++-----
 .../hle/service/nvdrv/devices/nvhost_ctrl.h   |  2 +
 src/video_core/gpu.cpp                        | 11 +++++
 src/video_core/gpu.h                          |  4 +-
 4 files changed, 48 insertions(+), 13 deletions(-)

diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp
index ef6731a8f2..8f47d63e33 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp
@@ -33,6 +33,8 @@ u32 nvhost_ctrl::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<
         return IocCtrlEventRegister(input, output);
     case IoctlCommand::IocCtrlEventUnregisterCommand:
         return IocCtrlEventUnregister(input, output);
+    case IoctlCommand::IocCtrlEventSignalCommand:
+        return IocCtrlEventSignal(input, output);
     }
     UNIMPLEMENTED_MSG("Unimplemented ioctl");
     return 0;
@@ -74,30 +76,29 @@ u32 nvhost_ctrl::IocCtrlEventWait(const std::vector<u8>& input, std::vector<u8>&
         return NvResult::Timeout;
     }
 
-    u32 event_index;
+    u32 event_id;
     if (is_async) {
-        event_index = params.value;
-        if (event_index >= 64) {
+        event_id = params.value & 0x00FF;
+        if (event_id >= 64) {
             std::memcpy(output.data(), &params, sizeof(params));
             return NvResult::BadParameter;
         }
     } else {
-        event_index = events_interface.GetFreeEvent();
+        event_id = events_interface.GetFreeEvent();
     }
 
-    EventState status = events_interface.status[event_index];
-    if (event_index < MaxNvEvents || status == EventState::Free ||
-        status == EventState::Registered) {
-        events_interface.SetEventStatus(event_index, EventState::Waiting);
-        events_interface.assigned_syncpt[event_index] = params.syncpt_id;
-        events_interface.assigned_value[event_index] = params.threshold;
+    EventState status = events_interface.status[event_id];
+    if (event_id < MaxNvEvents || status == EventState::Free || status == EventState::Registered) {
+        events_interface.SetEventStatus(event_id, EventState::Waiting);
+        events_interface.assigned_syncpt[event_id] = params.syncpt_id;
+        events_interface.assigned_value[event_id] = params.threshold;
         if (is_async) {
             params.value = params.syncpt_id << 4;
         } else {
             params.value = ((params.syncpt_id & 0xfff) << 16) | 0x10000000;
         }
-        params.value |= event_index;
-        gpu.RegisterEvent(event_index, params.syncpt_id, params.threshold);
+        params.value |= event_id;
+        gpu.RegisterEvent(event_id, params.syncpt_id, params.threshold);
         std::memcpy(output.data(), &params, sizeof(params));
         return NvResult::Timeout;
     }
@@ -131,4 +132,23 @@ u32 nvhost_ctrl::IocCtrlEventUnregister(const std::vector<u8>& input, std::vecto
     return NvResult::Success;
 }
 
+u32 nvhost_ctrl::IocCtrlEventSignal(const std::vector<u8>& input, std::vector<u8>& output) {
+    IocCtrlEventSignalParams params{};
+    std::memcpy(&params, input.data(), sizeof(params));
+    // TODO(Blinkhawk): This is normally called when an NvEvents timeout on WaitSynchronization
+    // It is believed to cancel the GPU Event. However, better research is required
+    u32 event_id = params.user_event_id & 0x00FF;
+    LOG_WARNING(Service_NVDRV, "(STUBBED) called, user_event_id: {:X}", event_id);
+    if (event_id >= MaxNvEvents) {
+        return NvResult::BadParameter;
+    }
+    if (events_interface.status[event_id] == EventState::Waiting) {
+        auto& gpu = Core::System::GetInstance().GPU();
+        gpu.CancelEvent(event_id, events_interface.assigned_syncpt[event_id],
+                        events_interface.assigned_value[event_id]);
+        events_interface.LiberateEvent(event_id);
+    }
+    return NvResult::Success;
+}
+
 } // namespace Service::Nvidia::Devices
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h
index 2985e7f75c..b5bc9337b2 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h
@@ -139,6 +139,8 @@ private:
 
     u32 IocCtrlEventUnregister(const std::vector<u8>& input, std::vector<u8>& output);
 
+    u32 IocCtrlEventSignal(const std::vector<u8>& input, std::vector<u8>& output);
+
     EventsInterface& events_interface;
 };
 
diff --git a/src/video_core/gpu.cpp b/src/video_core/gpu.cpp
index 06eb570ab7..1fa6770ca8 100644
--- a/src/video_core/gpu.cpp
+++ b/src/video_core/gpu.cpp
@@ -95,6 +95,17 @@ void GPU::RegisterEvent(const u32 event_id, const u32 syncpoint_id, const u32 va
     events[syncpoint_id].emplace_back(event_id, value);
 }
 
+void GPU::CancelEvent(const u32 event_id, const u32 syncpoint_id, const u32 value) {
+    auto it = events[syncpoint_id].begin();
+    while (it != events[syncpoint_id].end()) {
+        if (value == it->value) {
+            it = events[syncpoint_id].erase(it);
+            return;
+        }
+        it++;
+    }
+}
+
 u32 RenderTargetBytesPerPixel(RenderTargetFormat format) {
     ASSERT(format != RenderTargetFormat::NONE);
 
diff --git a/src/video_core/gpu.h b/src/video_core/gpu.h
index c3e5311fac..4805a5fbcb 100644
--- a/src/video_core/gpu.h
+++ b/src/video_core/gpu.h
@@ -171,7 +171,9 @@ public:
 
     u32 GetSyncpointValue(const u32 syncpoint_id) const;
 
-    void RegisterEvent(const u32 event_id, const u32 sync_point_id, const u32 value);
+    void RegisterEvent(const u32 event_id, const u32 syncpoint_id, const u32 value);
+
+    void CancelEvent(const u32 event_id, const u32 syncpoint_id, const u32 value);
 
     /// Returns a const reference to the GPU DMA pusher.
     const Tegra::DmaPusher& DmaPusher() const;