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Document unsafe versions and add BlockCopyUnsafe

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This commit is contained in:
Fernando Sahmkow
2019-04-16 10:11:35 -04:00
parent 6fc562a9aa
commit 06d1c5a991
3 changed files with 45 additions and 16 deletions
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30
src/video_core/memory_manager.h
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@ -65,11 +65,31 @@ public:
u8* GetPointer(GPUVAddr addr);
const u8* GetPointer(GPUVAddr addr) const;
void ReadBlock(GPUVAddr src_addr, void* dest_buffer, std::size_t size) const;
void WriteBlock(GPUVAddr dest_addr, const void* src_buffer, std::size_t size);
void ReadBlockUnsafe(GPUVAddr src_addr, void* dest_buffer, std::size_t size) const;
void WriteBlockUnsafe(GPUVAddr dest_addr, const void* src_buffer, std::size_t size);
void CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, std::size_t size);
/*
* ReadBlock and WriteBlock are full read and write operations over virtual
* GPU Memory. It's important to use these when GPU memory may not be continous
* in the Host Memory counterpart. Note: This functions cause Host GPU Memory
* Flushes and Invalidations, respectively to each operation.
*/
void ReadBlock(GPUVAddr src_addr, void* dest_buffer, const std::size_t size) const;
void WriteBlock(GPUVAddr dest_addr, const void* src_buffer, const std::size_t size);
void CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, const std::size_t size);
/*
* ReadBlockUnsafe and WriteBlockUnsafe are special versions of ReadBlock and
* WriteBlock respectively. In this versions, no flushing or invalidation is actually
* done and their performance is similar to a memcpy. This functions can be used
* on either of this 2 scenarios instead of their safe counterpart:
* - Memory which is sure to never be represented in the Host GPU.
* - Memory Managed by a Cache Manager. Example: Texture Flushing should use
* WriteBlockUnsafe instead of WriteBlock since it shouldn't invalidate the texture
* being flushed.
*/
void ReadBlockUnsafe(GPUVAddr src_addr, void* dest_buffer, const std::size_t size) const;
void WriteBlockUnsafe(GPUVAddr dest_addr, const void* src_buffer, const std::size_t size);
void CopyBlockUnsafe(GPUVAddr dest_addr, GPUVAddr src_addr, const std::size_t size);
private:
using VMAMap = std::map<GPUVAddr, VirtualMemoryArea>;