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Implement IsBlockContinous

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This detects when a GPU Memory Block is not continous within host cpu
memory.
This commit is contained in:
Fernando Sahmkow 2019-04-16 15:45:24 -04:00 committed by FernandoS27
parent 13d626fc21
commit d0082de82a
2 changed files with 13 additions and 2 deletions
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8
src/video_core/memory_manager.cpp
View file

@ -199,6 +199,14 @@ const u8* MemoryManager::GetPointer(GPUVAddr addr) const {
return {};
}
bool MemoryManager::IsBlockContinous(const GPUVAddr start, const std::size_t size) {
const GPUVAddr end = start + size;
const auto host_ptr_start = reinterpret_cast<std::uintptr_t>(GetPointer(start));
const auto host_ptr_end = reinterpret_cast<std::uintptr_t>(GetPointer(end));
const std::size_t range = static_cast<std::size_t>(host_ptr_end - host_ptr_start);
return range == size;
}
void MemoryManager::ReadBlock(GPUVAddr src_addr, void* dest_buffer, const std::size_t size) const {
std::size_t remaining_size{size};
std::size_t page_index{src_addr >> page_bits};

7
src/video_core/memory_manager.h
View file

@ -65,7 +65,10 @@ public:
u8* GetPointer(GPUVAddr addr);
const u8* GetPointer(GPUVAddr addr) const;
/*
// Returns true if the block is continous in host memory, false otherwise
bool IsBlockContinous(const GPUVAddr start, const 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
@ -75,7 +78,7 @@ public:
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