1 files changed, 116 insertions, 0 deletions
diff --git a/src/video_core/renderer_vulkan/vk_buffer_cache.cpp b/src/video_core/renderer_vulkan/vk_buffer_cache.cpp
new file mode 100644
index 000000000..18b7b94a1
--- /dev/null
+++ b/src/video_core/renderer_vulkan/vk_buffer_cache.cpp
@@ -0,0 +1,116 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include <memory>
+#include <optional>
+#include <tuple>
+
+#include "common/alignment.h"
+#include "core/core.h"
+#include "core/memory.h"
+#include "video_core/renderer_vulkan/declarations.h"
+#include "video_core/renderer_vulkan/vk_buffer_cache.h"
+#include "video_core/renderer_vulkan/vk_scheduler.h"
+#include "video_core/renderer_vulkan/vk_stream_buffer.h"
+
+namespace Vulkan {
+
+VKBufferCache::VKBufferCache(Tegra::MemoryManager& tegra_memory_manager,
+                             VideoCore::RasterizerInterface& rasterizer, const VKDevice& device,
+                             VKMemoryManager& memory_manager, VKScheduler& scheduler, u64 size)
+    : RasterizerCache{rasterizer}, tegra_memory_manager{tegra_memory_manager} {
+    const auto usage = vk::BufferUsageFlagBits::eVertexBuffer |
+                       vk::BufferUsageFlagBits::eIndexBuffer |
+                       vk::BufferUsageFlagBits::eUniformBuffer;
+    const auto access = vk::AccessFlagBits::eVertexAttributeRead | vk::AccessFlagBits::eIndexRead |
+                        vk::AccessFlagBits::eUniformRead;
+    stream_buffer =
+        std::make_unique<VKStreamBuffer>(device, memory_manager, scheduler, size, usage, access,
+                                         vk::PipelineStageFlagBits::eAllCommands);
+    buffer_handle = stream_buffer->GetBuffer();
+}
+
+VKBufferCache::~VKBufferCache() = default;
+
+u64 VKBufferCache::UploadMemory(Tegra::GPUVAddr gpu_addr, std::size_t size, u64 alignment,
+                                bool cache) {
+    const auto cpu_addr{tegra_memory_manager.GpuToCpuAddress(gpu_addr)};
+    ASSERT(cpu_addr);
+
+    // Cache management is a big overhead, so only cache entries with a given size.
+    // TODO: Figure out which size is the best for given games.
+    cache &= size >= 2048;
+
+    if (cache) {
+        if (auto entry = TryGet(*cpu_addr); entry) {
+            if (entry->size >= size && entry->alignment == alignment) {
+                return entry->offset;
+            }
+            Unregister(entry);
+        }
+    }
+
+    AlignBuffer(alignment);
+    const u64 uploaded_offset = buffer_offset;
+
+    Memory::ReadBlock(*cpu_addr, buffer_ptr, size);
+
+    buffer_ptr += size;
+    buffer_offset += size;
+
+    if (cache) {
+        auto entry = std::make_shared<CachedBufferEntry>();
+        entry->offset = uploaded_offset;
+        entry->size = size;
+        entry->alignment = alignment;
+        entry->addr = *cpu_addr;
+        Register(entry);
+    }
+
+    return uploaded_offset;
+}
+
+u64 VKBufferCache::UploadHostMemory(const u8* raw_pointer, std::size_t size, u64 alignment) {
+    AlignBuffer(alignment);
+    std::memcpy(buffer_ptr, raw_pointer, size);
+    const u64 uploaded_offset = buffer_offset;
+
+    buffer_ptr += size;
+    buffer_offset += size;
+    return uploaded_offset;
+}
+
+std::tuple<u8*, u64> VKBufferCache::ReserveMemory(std::size_t size, u64 alignment) {
+    AlignBuffer(alignment);
+    u8* const uploaded_ptr = buffer_ptr;
+    const u64 uploaded_offset = buffer_offset;
+
+    buffer_ptr += size;
+    buffer_offset += size;
+    return {uploaded_ptr, uploaded_offset};
+}
+
+void VKBufferCache::Reserve(std::size_t max_size) {
+    bool invalidate;
+    std::tie(buffer_ptr, buffer_offset_base, invalidate) = stream_buffer->Reserve(max_size);
+    buffer_offset = buffer_offset_base;
+
+    if (invalidate) {
+        InvalidateAll();
+    }
+}
+
+VKExecutionContext VKBufferCache::Send(VKExecutionContext exctx) {
+    return stream_buffer->Send(exctx, buffer_offset - buffer_offset_base);
+}
+
+void VKBufferCache::AlignBuffer(std::size_t alignment) {
+    // Align the offset, not the mapped pointer
+    const u64 offset_aligned = Common::AlignUp(buffer_offset, alignment);
+    buffer_ptr += offset_aligned - buffer_offset;
+    buffer_offset = offset_aligned;
+}
+
+} // namespace Vulkan