Vulkan: Migrate buffers between memory types to improve GPU performance (#4540)

* Initial implementation of migration between memory heaps

- Missing OOM handling
- Missing `_map` data safety when remapping
  - Copy may not have completed yet (needs some kind of fence)
  - Map may be unmapped before it is done being used. (needs scoped access)
- SSBO accesses are all "writes" - maybe pass info in another way.
- Missing keeping map type when resizing buffers (should this be done?)

* Ensure migrated data is in place before flushing.

* Fix issue where old waitable would be signalled.

- There is a real issue where existing Auto<> references need to be replaced.

* Swap bound Auto<> instances when swapping buffer backing

* Fix conversion buffers

* Don't try move buffers if the host has shared memory.

* Make GPU methods return PinnedSpan with scope

* Storage Hint

* Fix stupidity

* Fix rebase

* Tweak rules

Attempt to sidestep BOTW slowdown

* Remove line

* Migrate only when command buffers flush

* Change backing swap log to debug

* Address some feedback

* Disallow backing swap when the flush lock is held by the current thread

* Make PinnedSpan from ReadOnlySpan explicitly unsafe

* Fix some small issues

- Index buffer swap fixed
- Allocate DeviceLocal buffers using a separate block list to images.

* Remove alternative flags

* Address feedback

1 files changed, 7 insertions, 2 deletions

diff --git a/Ryujinx.Graphics.GAL/IRenderer.cs b/Ryujinx.Graphics.GAL/IRenderer.cs
index 1f2af559..2af7b5db 100644
--- a/Ryujinx.Graphics.GAL/IRenderer.cs
+++ b/Ryujinx.Graphics.GAL/IRenderer.cs
@@ -15,7 +15,12 @@ namespace Ryujinx.Graphics.GAL
 
         void BackgroundContextAction(Action action, bool alwaysBackground = false);
 
-        BufferHandle CreateBuffer(int size);
+        BufferHandle CreateBuffer(int size, BufferHandle storageHint);
+
+        BufferHandle CreateBuffer(int size)
+        {
+            return CreateBuffer(size, BufferHandle.Null);
+        }
 
         IProgram CreateProgram(ShaderSource[] shaders, ShaderInfo info);
 
@@ -26,7 +31,7 @@ namespace Ryujinx.Graphics.GAL
 
         void DeleteBuffer(BufferHandle buffer);
 
-        ReadOnlySpan<byte> GetBufferData(BufferHandle buffer, int offset, int size);
+        PinnedSpan<byte> GetBufferData(BufferHandle buffer, int offset, int size);
 
         Capabilities GetCapabilities();
         ulong GetCurrentSync();