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Implement CPU-only Maxwell3D Inline Constant Buffer Updates

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Implements inline constant buffer updates that are written to the CPU copy of the buffer rather than generating an actual inline buffer write, this works for TIC/TSC index updates but won't work when the buffer is expected to actually be updated inline with regard to sequence rather than just as a buffer upload prior to rendering. 

GPU-sided constant buffer updates will be implemented later with optimizations for updating an entire range by handling GPFIFO `Inc`/`NonInc`directly and submitting it as a host inline buffer update.
This commit is contained in:
PixelyIon 2022-01-06 00:50:55 +05:30
parent 08f29f7da4
commit bc29b23972
3 changed files with 58 additions and 0 deletions
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33
app/src/main/cpp/skyline/gpu/interconnect/graphics_context.h
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@ -543,9 +543,33 @@ namespace skyline::gpu::interconnect {
}
throw exception("Object extent ({} + {} = {}) is larger than constant buffer size: {}", size + offset, sizeof(T), size + offset + sizeof(T), size);
}
/**
* @brief Writes an object to the supplied offset in the constant buffer
* @note This must only be called when the GuestBuffer is resolved correctly
*/
template<typename T>
void Write(const T &object, size_t offset) {
size_t objectOffset{};
for (auto &mapping: guest.mappings) {
if (offset < mapping.size_bytes()) {
auto copySize{std::min(mapping.size_bytes() - offset, sizeof(T))};
std::memcpy(mapping.data() + offset, reinterpret_cast<const u8 *>(&object) + objectOffset, copySize);
objectOffset += copySize;
if (objectOffset == sizeof(T))
return;
offset = mapping.size_bytes();
} else {
offset -= mapping.size_bytes();
}
}
throw exception("Object extent ({} + {} = {}) is larger than constant buffer size: {}", size + offset, sizeof(T), size + offset + sizeof(T), size);
}
};
ConstantBuffer constantBufferSelector; //!< The constant buffer selector is used to bind a constant buffer to a stage or update data in it
u32 constantBufferUpdateOffset{}; //!< The offset at which any inline constant buffer updata data is written
public:
void SetConstantBufferSelectorSize(u32 size) {
constantBufferSelector.size = size;
@ -575,6 +599,15 @@ namespace skyline::gpu::interconnect {
return constantBufferSelector;
}
void SetConstantBufferUpdateOffset(u32 offset) {
constantBufferUpdateOffset = offset;
}
void ConstantBufferUpdate(u32 data) {
auto constantBuffer{GetConstantBufferSelector().value()};
constantBuffer.Write(data, constantBufferUpdateOffset);
}
/* Shader Program */
private:
struct Shader {

16
app/src/main/cpp/skyline/soc/gm20b/engines/maxwell_3d.cpp
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@ -48,6 +48,7 @@ namespace skyline::soc::gm20b::engine::maxwell3d {
#define MAXWELL3D_OFFSET(field) (sizeof(typeof(Registers::field)) - sizeof(std::remove_reference_t<decltype(*Registers::field)>)) / sizeof(u32)
#define MAXWELL3D_STRUCT_OFFSET(field, member) MAXWELL3D_OFFSET(field) + U32_OFFSET(std::remove_reference_t<decltype(*Registers::field)>, member)
#define MAXWELL3D_STRUCT_STRUCT_OFFSET(field, member, submember) MAXWELL3D_STRUCT_OFFSET(field, member) + U32_OFFSET(std::remove_reference_t<decltype(Registers::field->member)>, submember)
#define MAXWELL3D_STRUCT_ARRAY_OFFSET(field, member, index) MAXWELL3D_STRUCT_OFFSET(field, member) + ((sizeof(std::remove_reference_t<decltype(Registers::field->member[0])>) / sizeof(u32)) * index)
#define MAXWELL3D_ARRAY_OFFSET(field, index) MAXWELL3D_OFFSET(field) + ((sizeof(std::remove_reference_t<decltype(Registers::field[0])>) / sizeof(u32)) * index)
#define MAXWELL3D_ARRAY_STRUCT_OFFSET(field, index, member) MAXWELL3D_ARRAY_OFFSET(field, index) + U32_OFFSET(std::remove_reference_t<decltype(Registers::field[0])>, member)
#define MAXWELL3D_ARRAY_STRUCT_STRUCT_OFFSET(field, index, member, submember) MAXWELL3D_ARRAY_STRUCT_OFFSET(field, index, member) + U32_OFFSET(decltype(Registers::field[0].member), submember)
@ -64,6 +65,7 @@ namespace skyline::soc::gm20b::engine::maxwell3d {
}
#define MAXWELL3D_STRUCT_CASE(field, member, content) MAXWELL3D_CASE_BASE(member, field->member, MAXWELL3D_STRUCT_OFFSET(field, member), content)
#define MAXWELL3D_STRUCT_STRUCT_CASE(field, member, submember, content) MAXWELL3D_CASE_BASE(submember, field->member.submember, MAXWELL3D_STRUCT_STRUCT_OFFSET(field, member, submember), content)
#define MAXWELL3D_STRUCT_ARRAY_CASE(field, member, index, content) MAXWELL3D_CASE_BASE(member, field->member[index], MAXWELL3D_STRUCT_ARRAY_OFFSET(field, member, index), content)
#define MAXWELL3D_ARRAY_CASE(field, index, content) MAXWELL3D_CASE_BASE(field, field[index], MAXWELL3D_ARRAY_OFFSET(field, index), content)
#define MAXWELL3D_ARRAY_STRUCT_CASE(field, index, member, content) MAXWELL3D_CASE_BASE(member, field[index].member, MAXWELL3D_ARRAY_STRUCT_OFFSET(field, index, member), content)
#define MAXWELL3D_ARRAY_STRUCT_STRUCT_CASE(field, index, member, submember, content) MAXWELL3D_CASE_BASE(submember, field[index].member.submember, MAXWELL3D_ARRAY_STRUCT_STRUCT_OFFSET(field, index, member, submember), content)
@ -487,6 +489,10 @@ namespace skyline::soc::gm20b::engine::maxwell3d {
context.SetTexturePoolMaximumIndex(maximumIndex);
})
MAXWELL3D_STRUCT_CASE(constantBufferUpdate, offset, {
context.SetConstantBufferUpdateOffset(offset);
})
default:
break;
}
@ -575,12 +581,21 @@ namespace skyline::soc::gm20b::engine::maxwell3d {
registers.raw[0xD00] = 1;
})
#define CBUF_UPDATE_CALLBACKS(z, index, data_) \
MAXWELL3D_STRUCT_ARRAY_CASE(constantBufferUpdate, data, index, { \
context.ConstantBufferUpdate(data); \
})
BOOST_PP_REPEAT(16, CBUF_UPDATE_CALLBACKS, 0)
#undef CBUF_UPDATE_CALLBACKS
default:
break;
}
#undef MAXWELL3D_OFFSET
#undef MAXWELL3D_STRUCT_OFFSET
#undef MAXWELL3D_STRUCT_ARRAY_OFFSET
#undef MAXWELL3D_ARRAY_OFFSET
#undef MAXWELL3D_ARRAY_STRUCT_OFFSET
#undef MAXWELL3D_ARRAY_STRUCT_STRUCT_OFFSET
@ -588,6 +603,7 @@ namespace skyline::soc::gm20b::engine::maxwell3d {
#undef MAXWELL3D_CASE_BASE
#undef MAXWELL3D_CASE
#undef MAXWELL3D_STRUCT_CASE
#undef MAXWELL3D_STRUCT_ARRAY_CASE
#undef MAXWELL3D_ARRAY_CASE
#undef MAXWELL3D_ARRAY_STRUCT_CASE
#undef MAXWELL3D_ARRAY_STRUCT_STRUCT_CASE

9
app/src/main/cpp/skyline/soc/gm20b/engines/maxwell_3d.h
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@ -293,6 +293,15 @@ namespace skyline::soc::gm20b::engine::maxwell3d {
};
Register<0x8E0, ConstantBufferSelector> constantBufferSelector;
/**
* @brief Allows updating the currently selected constant buffer inline with an offset and up to 16 words of data
*/
struct ConstantBufferUpdate {
u32 offset;
std::array<u32, 16> data;
};
Register<0x8E3, ConstantBufferUpdate> constantBufferUpdate;
Register<0x900, std::array<type::Bind, type::PipelineStageCount>> bind; //!< Binds constant buffers to pipeline stages
Register<0x982, u32> bindlessTextureConstantBufferIndex; //!< The index of the constant buffer containing bindless texture descriptors