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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "core/memory.h"
#include "video_core/engines/maxwell_dma.h"
#include "video_core/textures/decoders.h"
namespace Tegra {
namespace Engines {
MaxwellDMA::MaxwellDMA(MemoryManager& memory_manager) : memory_manager(memory_manager) {}
void MaxwellDMA::WriteReg(u32 method, u32 value) {
ASSERT_MSG(method < Regs::NUM_REGS,
"Invalid MaxwellDMA register, increase the size of the Regs structure");
regs.reg_array[method] = value;
#define MAXWELLDMA_REG_INDEX(field_name) \
(offsetof(Tegra::Engines::MaxwellDMA::Regs, field_name) / sizeof(u32))
switch (method) {
case MAXWELLDMA_REG_INDEX(exec): {
HandleCopy();
break;
}
}
#undef MAXWELLDMA_REG_INDEX
}
void MaxwellDMA::HandleCopy() {
LOG_WARNING(HW_GPU, "Requested a DMA copy");
const GPUVAddr source = regs.src_address.Address();
const GPUVAddr dest = regs.dst_address.Address();
const VAddr source_cpu = *memory_manager.GpuToCpuAddress(source);
const VAddr dest_cpu = *memory_manager.GpuToCpuAddress(dest);
// TODO(Subv): Perform more research and implement all features of this engine.
ASSERT(regs.exec.enable_swizzle == 0);
ASSERT(regs.exec.query_mode == Regs::QueryMode::None);
ASSERT(regs.exec.query_intr == Regs::QueryIntr::None);
ASSERT(regs.exec.copy_mode == Regs::CopyMode::Unk2);
ASSERT(regs.src_params.pos_x == 0);
ASSERT(regs.src_params.pos_y == 0);
ASSERT(regs.dst_params.pos_x == 0);
ASSERT(regs.dst_params.pos_y == 0);
if (regs.exec.is_dst_linear == regs.exec.is_src_linear) {
size_t copy_size = regs.x_count;
// When the enable_2d bit is disabled, the copy is performed as if we were copying a 1D
// buffer of length `x_count`, otherwise we copy a 2D buffer of size (x_count, y_count).
if (regs.exec.enable_2d) {
copy_size = copy_size * regs.y_count;
}
Memory::CopyBlock(dest_cpu, source_cpu, copy_size);
return;
}
ASSERT(regs.exec.enable_2d == 1);
u8* src_buffer = Memory::GetPointer(source_cpu);
u8* dst_buffer = Memory::GetPointer(dest_cpu);
if (regs.exec.is_dst_linear && !regs.exec.is_src_linear) {
// If the input is tiled and the output is linear, deswizzle the input and copy it over.
Texture::CopySwizzledData(regs.src_params.size_x, regs.src_params.size_y, 1, 1, src_buffer,
dst_buffer, true, regs.src_params.BlockHeight());
} else {
// If the input is linear and the output is tiled, swizzle the input and copy it over.
Texture::CopySwizzledData(regs.dst_params.size_x, regs.dst_params.size_y, 1, 1, dst_buffer,
src_buffer, false, regs.dst_params.BlockHeight());
}
}
} // namespace Engines
} // namespace Tegra
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