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Merge pull request #2411 from FernandoS27/unsafe-gpu 

GPU Manager: Implement ReadBlockUnsafe and WriteBlockUnsafe
This commit is contained in:
bunnei 2019-04-22 17:09:00 -04:00 committed by GitHub
parent 01100f8afd db4b2bc798
commit 68b707711a
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 99 additions and 15 deletions
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2
src/video_core/dma_pusher.cpp
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@ -57,7 +57,7 @@ bool DmaPusher::Step() {
// Push buffer non-empty, read a word
command_headers.resize(command_list_header.size);
gpu.MemoryManager().ReadBlock(dma_get, command_headers.data(),
gpu.MemoryManager().ReadBlockUnsafe(dma_get, command_headers.data(),
command_list_header.size * sizeof(u32));
for (const CommandHeader& command_header : command_headers) {

4
src/video_core/engines/maxwell_3d.cpp
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@ -418,7 +418,7 @@ Texture::TICEntry Maxwell3D::GetTICEntry(u32 tic_index) const {
const GPUVAddr tic_address_gpu{regs.tic.TICAddress() + tic_index * sizeof(Texture::TICEntry)};
Texture::TICEntry tic_entry;
memory_manager.ReadBlock(tic_address_gpu, &tic_entry, sizeof(Texture::TICEntry));
memory_manager.ReadBlockUnsafe(tic_address_gpu, &tic_entry, sizeof(Texture::TICEntry));
ASSERT_MSG(tic_entry.header_version == Texture::TICHeaderVersion::BlockLinear ||
tic_entry.header_version == Texture::TICHeaderVersion::Pitch,
@ -439,7 +439,7 @@ Texture::TSCEntry Maxwell3D::GetTSCEntry(u32 tsc_index) const {
const GPUVAddr tsc_address_gpu{regs.tsc.TSCAddress() + tsc_index * sizeof(Texture::TSCEntry)};
Texture::TSCEntry tsc_entry;
memory_manager.ReadBlock(tsc_address_gpu, &tsc_entry, sizeof(Texture::TSCEntry));
memory_manager.ReadBlockUnsafe(tsc_address_gpu, &tsc_entry, sizeof(Texture::TSCEntry));
return tsc_entry;
}

64
src/video_core/memory_manager.cpp
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@ -199,7 +199,15 @@ const u8* MemoryManager::GetPointer(GPUVAddr addr) const {
return {};
}
void MemoryManager::ReadBlock(GPUVAddr src_addr, void* dest_buffer, std::size_t size) const {
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};
std::size_t page_offset{src_addr & page_mask};
@ -226,7 +234,30 @@ void MemoryManager::ReadBlock(GPUVAddr src_addr, void* dest_buffer, std::size_t
}
}
void MemoryManager::WriteBlock(GPUVAddr dest_addr, const void* src_buffer, std::size_t size) {
void MemoryManager::ReadBlockUnsafe(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};
std::size_t page_offset{src_addr & page_mask};
while (remaining_size > 0) {
const std::size_t copy_amount{
std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
const u8* page_pointer = page_table.pointers[page_index];
if (page_pointer) {
const u8* src_ptr{page_pointer + page_offset};
std::memcpy(dest_buffer, src_ptr, copy_amount);
} else {
std::memset(dest_buffer, 0, copy_amount);
}
page_index++;
page_offset = 0;
dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
remaining_size -= copy_amount;
}
}
void MemoryManager::WriteBlock(GPUVAddr dest_addr, const void* src_buffer, const std::size_t size) {
std::size_t remaining_size{size};
std::size_t page_index{dest_addr >> page_bits};
std::size_t page_offset{dest_addr & page_mask};
@ -253,7 +284,28 @@ void MemoryManager::WriteBlock(GPUVAddr dest_addr, const void* src_buffer, std::
}
}
void MemoryManager::CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, std::size_t size) {
void MemoryManager::WriteBlockUnsafe(GPUVAddr dest_addr, const void* src_buffer,
const std::size_t size) {
std::size_t remaining_size{size};
std::size_t page_index{dest_addr >> page_bits};
std::size_t page_offset{dest_addr & page_mask};
while (remaining_size > 0) {
const std::size_t copy_amount{
std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
u8* page_pointer = page_table.pointers[page_index];
if (page_pointer) {
u8* dest_ptr{page_pointer + page_offset};
std::memcpy(dest_ptr, src_buffer, copy_amount);
}
page_index++;
page_offset = 0;
src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
remaining_size -= copy_amount;
}
}
void MemoryManager::CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, const std::size_t size) {
std::size_t remaining_size{size};
std::size_t page_index{src_addr >> page_bits};
std::size_t page_offset{src_addr & page_mask};
@ -281,6 +333,12 @@ void MemoryManager::CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, std::size_t
}
}
void MemoryManager::CopyBlockUnsafe(GPUVAddr dest_addr, GPUVAddr src_addr, const std::size_t size) {
std::vector<u8> tmp_buffer(size);
ReadBlockUnsafe(src_addr, tmp_buffer.data(), size);
WriteBlockUnsafe(dest_addr, tmp_buffer.data(), size);
}
void MemoryManager::MapPages(GPUVAddr base, u64 size, u8* memory, Common::PageType type,
VAddr backing_addr) {
LOG_DEBUG(HW_GPU, "Mapping {} onto {:016X}-{:016X}", fmt::ptr(memory), base * page_size,

29
src/video_core/memory_manager.h
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@ -65,9 +65,32 @@ 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 CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, std::size_t size);
// 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
* 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>;

13
src/video_core/renderer_opengl/gl_shader_cache.cpp
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@ -38,13 +38,15 @@ GPUVAddr GetShaderAddress(Maxwell::ShaderProgram program) {
}
/// Gets the shader program code from memory for the specified address
ProgramCode GetShaderCode(const u8* host_ptr) {
ProgramCode GetShaderCode(Tegra::MemoryManager& memory_manager, const GPUVAddr gpu_addr,
const u8* host_ptr) {
ProgramCode program_code(VideoCommon::Shader::MAX_PROGRAM_LENGTH);
ASSERT_OR_EXECUTE(host_ptr != nullptr, {
std::fill(program_code.begin(), program_code.end(), 0);
return program_code;
});
std::memcpy(program_code.data(), host_ptr, program_code.size() * sizeof(u64));
memory_manager.ReadBlockUnsafe(gpu_addr, program_code.data(),
program_code.size() * sizeof(u64));
return program_code;
}
@ -497,11 +499,12 @@ Shader ShaderCacheOpenGL::GetStageProgram(Maxwell::ShaderProgram program) {
if (!shader) {
// No shader found - create a new one
ProgramCode program_code{GetShaderCode(host_ptr)};
ProgramCode program_code{GetShaderCode(memory_manager, program_addr, host_ptr)};
ProgramCode program_code_b;
if (program == Maxwell::ShaderProgram::VertexA) {
program_code_b = GetShaderCode(
memory_manager.GetPointer(GetShaderAddress(Maxwell::ShaderProgram::VertexB)));
const GPUVAddr program_addr_b{GetShaderAddress(Maxwell::ShaderProgram::VertexB)};
program_code_b = GetShaderCode(memory_manager, program_addr_b,
memory_manager.GetPointer(program_addr_b));
}
const u64 unique_identifier = GetUniqueIdentifier(program, program_code, program_code_b);
const VAddr cpu_addr{*memory_manager.GpuToCpuAddress(program_addr)};