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Merge pull request #5785 from ReinUsesLisp/buffer-dma

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video_core/memory_manager: Flush destination buffer on CopyBlock
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bunnei 2021-01-24 22:57:00 -08:00 committed by GitHub
commit 62766b1326
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2 changed files with 21 additions and 8 deletions
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26
src/video_core/memory_manager.cpp
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@ -314,17 +314,29 @@ void MemoryManager::WriteBlockUnsafe(GPUVAddr gpu_dest_addr, const void* src_buf
}
}
void MemoryManager::FlushRegion(GPUVAddr gpu_addr, size_t size) const {
size_t remaining_size{size};
size_t page_index{gpu_addr >> page_bits};
size_t page_offset{gpu_addr & page_mask};
while (remaining_size > 0) {
const size_t num_bytes{std::min(page_size - page_offset, remaining_size)};
if (const auto page_addr{GpuToCpuAddress(page_index << page_bits)}; page_addr) {
rasterizer->FlushRegion(*page_addr + page_offset, num_bytes);
}
++page_index;
page_offset = 0;
remaining_size -= num_bytes;
}
}
void MemoryManager::CopyBlock(GPUVAddr gpu_dest_addr, GPUVAddr gpu_src_addr, std::size_t size) {
std::vector<u8> tmp_buffer(size);
ReadBlock(gpu_src_addr, tmp_buffer.data(), size);
WriteBlock(gpu_dest_addr, tmp_buffer.data(), size);
}
void MemoryManager::CopyBlockUnsafe(GPUVAddr gpu_dest_addr, GPUVAddr gpu_src_addr,
std::size_t size) {
std::vector<u8> tmp_buffer(size);
ReadBlockUnsafe(gpu_src_addr, tmp_buffer.data(), size);
WriteBlockUnsafe(gpu_dest_addr, tmp_buffer.data(), size);
// The output block must be flushed in case it has data modified from the GPU.
// Fixes NPC geometry in Zombie Panic in Wonderland DX
FlushRegion(gpu_dest_addr, size);
WriteBlock(gpu_dest_addr, tmp_buffer.data(), size);
}
bool MemoryManager::IsGranularRange(GPUVAddr gpu_addr, std::size_t size) const {

3
src/video_core/memory_manager.h
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@ -107,7 +107,6 @@ public:
*/
void ReadBlockUnsafe(GPUVAddr gpu_src_addr, void* dest_buffer, std::size_t size) const;
void WriteBlockUnsafe(GPUVAddr gpu_dest_addr, const void* src_buffer, std::size_t size);
void CopyBlockUnsafe(GPUVAddr gpu_dest_addr, GPUVAddr gpu_src_addr, std::size_t size);
/**
* IsGranularRange checks if a gpu region can be simply read with a pointer.
@ -131,6 +130,8 @@ private:
void TryLockPage(PageEntry page_entry, std::size_t size);
void TryUnlockPage(PageEntry page_entry, std::size_t size);
void FlushRegion(GPUVAddr gpu_addr, size_t size) const;
[[nodiscard]] static constexpr std::size_t PageEntryIndex(GPUVAddr gpu_addr) {
return (gpu_addr >> page_bits) & page_table_mask;
}