From 339d0d9d6c02cf79d6025dae7c60d8635fa4ea3b Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow
Date: Sun, 16 Feb 2020 16:24:37 -0400
Subject: GPU: Delay Fences.

---
 src/video_core/engines/maxwell_3d.cpp | 10 +++++++++-
 src/video_core/engines/maxwell_3d.h   |  4 ++++
 2 files changed, 13 insertions(+), 1 deletion(-)

(limited to 'src/video_core/engines')

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index 2298a6273..2605c3b42 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -397,6 +397,14 @@ void Maxwell3D::StampQueryResult(u64 payload, bool long_query) {
     }
 }
 
+void Maxwell3D::ReleaseFences() {
+    for (const auto pair : delay_fences) {
+        const auto [addr, payload] = pair;
+        memory_manager.Write<u32>(addr, static_cast<u32>(payload));
+    }
+    delay_fences.clear();
+}
+
 void Maxwell3D::ProcessQueryGet() {
     // TODO(Subv): Support the other query units.
     ASSERT_MSG(regs.query.query_get.unit == Regs::QueryUnit::Crop,
@@ -407,7 +415,7 @@ void Maxwell3D::ProcessQueryGet() {
         rasterizer.FlushCommands();
         rasterizer.SyncGuestHost();
         const u64 result = regs.query.query_sequence;
-        StampQueryResult(result, regs.query.query_get.short_query == 0);
+        delay_fences.emplace_back(regs.query.QueryAddress(), result);
         break;
     }
     case Regs::QueryOperation::Acquire:
diff --git a/src/video_core/engines/maxwell_3d.h b/src/video_core/engines/maxwell_3d.h
index 59d5752d2..0a93827ec 100644
--- a/src/video_core/engines/maxwell_3d.h
+++ b/src/video_core/engines/maxwell_3d.h
@@ -1427,6 +1427,8 @@ public:
         Tables tables{};
     } dirty;
 
+    void ReleaseFences();
+
 private:
     void InitializeRegisterDefaults();
 
@@ -1467,6 +1469,8 @@ private:
 
     std::array<u8, Regs::NUM_REGS> dirty_pointers{};
 
+    std::vector<std::pair<GPUVAddr, u64>> delay_fences;
+
     /// Retrieves information about a specific TIC entry from the TIC buffer.
     Texture::TICEntry GetTICEntry(u32 tic_index) const;
 
-- 
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