Merge branch 'nx2' into ldn/room-handshake

1 files changed, 10 insertions, 0 deletions

diff --git a/src/video_core/gpu_split.h b/src/video_core/gpu_split.h
index d6f91e4141..c7c7118481 100644
--- a/src/video_core/gpu_split.h
+++ b/src/video_core/gpu_split.h
@@ -100,6 +100,13 @@ public:
     /// Waits until the back executed everything sent so far.
     void Drain();
 
+    /// Compute or copy work was just sent: what can write GPU-written command lists.
+    void NoteWriter() {
+        last_writer_position = write_position;
+    }
+    /// Waits until the back executed the compute and copy work sent so far (not what came after).
+    void WaitForWriters();
+
 private:
     enum class Kind : u64 {
         Wrap,   ///< The rest of the ring is unused: continue at its start
@@ -156,6 +163,7 @@ private:
 
     // Front side.
     u64 write_position{};
+    u64 last_writer_position{};
     u64 published_local{};
     u64 consumed_cache{};
     /// Words between publishes: small right after a drain, while the back has nothing to do.
@@ -169,6 +177,8 @@ private:
 
     alignas(64) std::atomic<u64> published{};
     alignas(64) std::atomic<u64> consumed{};
+    /// A position the front waits for (WaitForWriters): the back stores `consumed` once past it.
+    alignas(64) std::atomic<u64> wait_target{~u64{0}};
     alignas(64) std::atomic<bool> back_waiting{};
     std::atomic<u32> wake{};
     std::jthread back_thread;