From 82b829625b89a706dd0d867c529f533fe928710c Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Fri, 7 Jun 2019 12:56:30 -0400
Subject: video_core: Implement GPU side Syncpoints

---
 src/video_core/engines/maxwell_3d.cpp |  5 +++--
 src/video_core/gpu.cpp                | 24 ++++++++++++++++++++++++
 src/video_core/gpu.h                  | 24 ++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 2 deletions(-)

(limited to 'src/video_core')

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index 8755b8af4..224c27bd2 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -346,8 +346,9 @@ void Maxwell3D::ProcessSyncPoint() {
     const u32 sync_point = regs.sync_info.sync_point.Value();
     const u32 increment = regs.sync_info.increment.Value();
     const u32 cache_flush = regs.sync_info.unknown.Value();
-    LOG_DEBUG(HW_GPU, "Syncpoint set {}, increment: {}, unk: {}", sync_point, increment,
-              cache_flush);
+    if (increment) {
+        system.GPU().IncrementSyncPoint(sync_point);
+    }
 }
 
 void Maxwell3D::DrawArrays() {
diff --git a/src/video_core/gpu.cpp b/src/video_core/gpu.cpp
index 52706505b..1d12f0493 100644
--- a/src/video_core/gpu.cpp
+++ b/src/video_core/gpu.cpp
@@ -66,6 +66,30 @@ const DmaPusher& GPU::DmaPusher() const {
     return *dma_pusher;
 }
 
+void GPU::IncrementSyncPoint(const u32 syncpoint_id) {
+    syncpoints[syncpoint_id]++;
+    if (!events[syncpoint_id].empty()) {
+        u32 value = syncpoints[syncpoint_id].load();
+        auto it = events[syncpoint_id].begin();
+        while (it != events[syncpoint_id].end()) {
+            if (value >= it->value) {
+                TriggerCpuInterrupt(it->event_id);
+                it = events[syncpoint_id].erase(it);
+                continue;
+            }
+            it++;
+        }
+    }
+}
+
+u32 GPU::GetSyncpointValue(const u32 syncpoint_id) const {
+    return syncpoints[syncpoint_id].load();
+}
+
+void GPU::RegisterEvent(const u32 event_id, const u32 syncpoint_id, const u32 value) {
+    events[syncpoint_id].emplace_back(event_id, value);
+}
+
 u32 RenderTargetBytesPerPixel(RenderTargetFormat format) {
     ASSERT(format != RenderTargetFormat::NONE);
 
diff --git a/src/video_core/gpu.h b/src/video_core/gpu.h
index fe6628923..4c97d6c6f 100644
--- a/src/video_core/gpu.h
+++ b/src/video_core/gpu.h
@@ -5,8 +5,11 @@
 #pragma once
 
 #include <array>
+#include <atomic>
+#include <list>
 #include <memory>
 #include "common/common_types.h"
+#include "core/hle/service/nvdrv/nvdata.h"
 #include "core/hle/service/nvflinger/buffer_queue.h"
 #include "video_core/dma_pusher.h"
 
@@ -164,6 +167,12 @@ public:
     /// Returns a reference to the GPU DMA pusher.
     Tegra::DmaPusher& DmaPusher();
 
+    void IncrementSyncPoint(const u32 syncpoint_id);
+
+    u32 GetSyncpointValue(const u32 syncpoint_id) const;
+
+    void RegisterEvent(const u32 event_id, const u32 sync_point_id, const u32 value);
+
     /// Returns a const reference to the GPU DMA pusher.
     const Tegra::DmaPusher& DmaPusher() const;
 
@@ -228,6 +237,11 @@ public:
     /// Notify rasterizer that any caches of the specified region should be flushed and invalidated
     virtual void FlushAndInvalidateRegion(CacheAddr addr, u64 size) = 0;
 
+protected:
+    virtual void TriggerCpuInterrupt(const u32 event_id) const {
+        // Todo implement this
+    }
+
 private:
     void ProcessBindMethod(const MethodCall& method_call);
     void ProcessSemaphoreTriggerMethod();
@@ -262,6 +276,16 @@ private:
     std::unique_ptr<Engines::MaxwellDMA> maxwell_dma;
     /// Inline memory engine
     std::unique_ptr<Engines::KeplerMemory> kepler_memory;
+
+    std::array<std::atomic<u32>, Service::Nvidia::MaxSyncPoints> syncpoints{};
+
+    struct Event {
+        Event(const u32 event_id, const u32 value) : event_id(event_id), value(value) {}
+        u32 event_id;
+        u32 value;
+    };
+
+    std::array<std::list<Event>, Service::Nvidia::MaxSyncPoints> events;
 };
 
 #define ASSERT_REG_POSITION(field_name, position)                                                  \
-- 
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