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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/microprofile.h"
#include "core/core.h"
#include "core/memory.h"
#include "video_core/dma_pusher.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/gpu.h"
namespace Tegra {
DmaPusher::DmaPusher(GPU& gpu) : gpu(gpu) {}
DmaPusher::~DmaPusher() = default;
MICROPROFILE_DEFINE(DispatchCalls, "GPU", "Execute command buffer", MP_RGB(128, 128, 192));
void DmaPusher::DispatchCalls() {
MICROPROFILE_SCOPE(DispatchCalls);
// On entering GPU code, assume all memory may be touched by the ARM core.
gpu.Maxwell3D().dirty_flags.OnMemoryWrite();
dma_pushbuffer_subindex = 0;
while (Core::System::GetInstance().IsPoweredOn()) {
if (!Step()) {
break;
}
}
}
bool DmaPusher::Step() {
if (dma_get != dma_put) {
// Push buffer non-empty, read a word
const auto address = gpu.MemoryManager().GpuToCpuAddress(dma_get);
ASSERT_MSG(address, "Invalid GPU address");
GPUVAddr size = dma_put - dma_get;
ASSERT_MSG(size % sizeof(CommandHeader) == 0, "Invalid aligned GPU addresses");
command_headers.resize(size / sizeof(CommandHeader));
Memory::ReadBlock(*address, command_headers.data(), size);
for (const CommandHeader& command_header : command_headers) {
// now, see if we're in the middle of a command
if (dma_state.length_pending) {
// Second word of long non-inc methods command - method count
dma_state.length_pending = 0;
dma_state.method_count = command_header.method_count_;
} else if (dma_state.method_count) {
// Data word of methods command
CallMethod(command_header.argument);
if (!dma_state.non_incrementing) {
dma_state.method++;
}
if (dma_increment_once) {
dma_state.non_incrementing = true;
}
dma_state.method_count--;
} else {
// No command active - this is the first word of a new one
switch (command_header.mode) {
case SubmissionMode::Increasing:
SetState(command_header);
dma_state.non_incrementing = false;
dma_increment_once = false;
break;
case SubmissionMode::NonIncreasing:
SetState(command_header);
dma_state.non_incrementing = true;
dma_increment_once = false;
break;
case SubmissionMode::Inline:
dma_state.method = command_header.method;
dma_state.subchannel = command_header.subchannel;
CallMethod(command_header.arg_count);
dma_state.non_incrementing = true;
dma_increment_once = false;
break;
case SubmissionMode::IncreaseOnce:
SetState(command_header);
dma_state.non_incrementing = false;
dma_increment_once = true;
break;
}
}
}
dma_get = dma_put;
if (!non_main) {
// TODO (degasus): This is dead code, as dma_mget is never read.
dma_mget = dma_get;
}
} else if (ib_enable && !dma_pushbuffer.empty()) {
// Current pushbuffer empty, but we have more IB entries to read
const CommandList& command_list{dma_pushbuffer.front()};
const CommandListHeader& command_list_header{command_list[dma_pushbuffer_subindex++]};
dma_get = command_list_header.addr;
dma_put = dma_get + command_list_header.size * sizeof(u32);
non_main = command_list_header.is_non_main;
if (dma_pushbuffer_subindex >= command_list.size()) {
// We've gone through the current list, remove it from the queue
dma_pushbuffer.pop();
dma_pushbuffer_subindex = 0;
}
} else {
// Otherwise, pushbuffer empty and IB empty or nonexistent - nothing to do
return {};
}
return true;
}
void DmaPusher::SetState(const CommandHeader& command_header) {
dma_state.method = command_header.method;
dma_state.subchannel = command_header.subchannel;
dma_state.method_count = command_header.method_count;
}
void DmaPusher::CallMethod(u32 argument) const {
gpu.CallMethod({dma_state.method, argument, dma_state.subchannel, dma_state.method_count});
}
} // namespace Tegra
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