{maxwell_3d,buffer_cache}: Implement memory barriers using 3D registers

Drop MemoryBarrier from the buffer cache and use Maxwell3D's register
WaitForIdle.

To implement this on OpenGL we just call glMemoryBarrier with the
necessary bits.

Vulkan lacks this synchronization primitive, so we set an event and
immediately wait for it. This is not a pretty solution, but it's what
Vulkan can do without submitting the current command buffer to the queue
(which ends up being more expensive on the CPU).

1 files changed, 0 insertions, 6 deletions

diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index 510f11089f..c86e914bed 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -89,10 +89,6 @@ public:
                 map->MarkAsWritten(true);
                 MarkRegionAsWritten(map->GetStart(), map->GetEnd() - 1);
             }
-        } else {
-            if (map->IsWritten()) {
-                WriteBarrier();
-            }
         }
 
         return {ToHandle(block), static_cast<u64>(block->GetOffset(cpu_addr))};
@@ -254,8 +250,6 @@ protected:
 
     virtual BufferType ToHandle(const OwnerBuffer& storage) = 0;
 
-    virtual void WriteBarrier() = 0;
-
     virtual OwnerBuffer CreateBlock(VAddr cpu_addr, std::size_t size) = 0;
 
     virtual void UploadBlockData(const OwnerBuffer& buffer, std::size_t offset, std::size_t size,