From 8d223e80925263bebdfe63002e935b954fc82e64 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sat, 27 May 2023 21:46:15 -0400
Subject: OpenGL: Make use of persistent buffer maps in buffer cache downloads

Persistent buffer maps were already used by the texture cache, this extends their usage for the buffer cache.

In my testing, using the memory maps for uploads was slower than the existing "ImmediateUpload" path, so the memory map usage is limited to downloads for the time being.
---
 src/video_core/buffer_cache/buffer_cache.h | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

(limited to 'src/video_core/buffer_cache/buffer_cache.h')

diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index 65494097b1..08bc66aaa6 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -465,7 +465,6 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
 
     if (committed_ranges.empty()) {
         if constexpr (IMPLEMENTS_ASYNC_DOWNLOADS) {
-
             async_buffers.emplace_back(std::optional<Async_Buffer>{});
         }
         return;
@@ -526,7 +525,6 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
     committed_ranges.clear();
     if (downloads.empty()) {
         if constexpr (IMPLEMENTS_ASYNC_DOWNLOADS) {
-
             async_buffers.emplace_back(std::optional<Async_Buffer>{});
         }
         return;
@@ -678,7 +676,7 @@ void BufferCache<P>::BindHostIndexBuffer() {
     const u32 size = index_buffer.size;
     const auto& draw_state = maxwell3d->draw_manager->GetDrawState();
     if (!draw_state.inline_index_draw_indexes.empty()) [[unlikely]] {
-        if constexpr (USE_MEMORY_MAPS) {
+        if constexpr (USE_MEMORY_MAPS_FOR_UPLOADS) {
             auto upload_staging = runtime.UploadStagingBuffer(size);
             std::array<BufferCopy, 1> copies{
                 {BufferCopy{.src_offset = upload_staging.offset, .dst_offset = 0, .size = size}}};
@@ -1446,7 +1444,7 @@ bool BufferCache<P>::SynchronizeBufferNoModified(Buffer& buffer, VAddr cpu_addr,
 template <class P>
 void BufferCache<P>::UploadMemory(Buffer& buffer, u64 total_size_bytes, u64 largest_copy,
                                   std::span<BufferCopy> copies) {
-    if constexpr (USE_MEMORY_MAPS) {
+    if constexpr (USE_MEMORY_MAPS_FOR_UPLOADS) {
         MappedUploadMemory(buffer, total_size_bytes, copies);
     } else {
         ImmediateUploadMemory(buffer, largest_copy, copies);
@@ -1457,7 +1455,7 @@ template <class P>
 void BufferCache<P>::ImmediateUploadMemory([[maybe_unused]] Buffer& buffer,
                                            [[maybe_unused]] u64 largest_copy,
                                            [[maybe_unused]] std::span<const BufferCopy> copies) {
-    if constexpr (!USE_MEMORY_MAPS) {
+    if constexpr (!USE_MEMORY_MAPS_FOR_UPLOADS) {
         std::span<u8> immediate_buffer;
         for (const BufferCopy& copy : copies) {
             std::span<const u8> upload_span;
@@ -1516,7 +1514,7 @@ bool BufferCache<P>::InlineMemory(VAddr dest_address, size_t copy_size,
     auto& buffer = slot_buffers[buffer_id];
     SynchronizeBuffer(buffer, dest_address, static_cast<u32>(copy_size));
 
-    if constexpr (USE_MEMORY_MAPS) {
+    if constexpr (USE_MEMORY_MAPS_FOR_UPLOADS) {
         auto upload_staging = runtime.UploadStagingBuffer(copy_size);
         std::array copies{BufferCopy{
             .src_offset = upload_staging.offset,
-- 
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