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dma_pushbuffer: Optimize to avoid loop and copy on Push.

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This commit is contained in:
bunnei 2018-11-27 19:17:33 -05:00
parent c568f5cea7
commit ac74b71d75
3 changed files with 23 additions and 13 deletions
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14
src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp
View file

@ -128,11 +128,9 @@ u32 nvhost_gpu::AllocateObjectContext(const std::vector<u8>& input, std::vector<
return 0;
}
static void PushGPUEntries(const std::vector<Tegra::CommandListHeader>& entries) {
static void PushGPUEntries(Tegra::CommandList&& entries) {
auto& dma_pusher{Core::System::GetInstance().GPU().DmaPusher()};
for (const auto& entry : entries) {
dma_pusher.Push(entry);
}
dma_pusher.Push(std::move(entries));
dma_pusher.DispatchCalls();
}
@ -149,11 +147,11 @@ u32 nvhost_gpu::SubmitGPFIFO(const std::vector<u8>& input, std::vector<u8>& outp
params.num_entries * sizeof(Tegra::CommandListHeader),
"Incorrect input size");
std::vector<Tegra::CommandListHeader> entries(params.num_entries);
Tegra::CommandList entries(params.num_entries);
std::memcpy(entries.data(), &input[sizeof(IoctlSubmitGpfifo)],
params.num_entries * sizeof(Tegra::CommandListHeader));
PushGPUEntries(entries);
PushGPUEntries(std::move(entries));
params.fence_out.id = 0;
params.fence_out.value = 0;
@ -170,11 +168,11 @@ u32 nvhost_gpu::KickoffPB(const std::vector<u8>& input, std::vector<u8>& output)
LOG_WARNING(Service_NVDRV, "(STUBBED) called, gpfifo={:X}, num_entries={:X}, flags={:X}",
params.address, params.num_entries, params.flags);
std::vector<Tegra::CommandListHeader> entries(params.num_entries);
Tegra::CommandList entries(params.num_entries);
Memory::ReadBlock(params.address, entries.data(),
params.num_entries * sizeof(Tegra::CommandListHeader));
PushGPUEntries(entries);
PushGPUEntries(std::move(entries));
params.fence_out.id = 0;
params.fence_out.value = 0;

12
src/video_core/dma_pusher.cpp
View file

@ -23,6 +23,8 @@ void DmaPusher::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;
@ -89,11 +91,17 @@ bool DmaPusher::Step() {
}
} else if (ib_enable && !dma_pushbuffer.empty()) {
// Current pushbuffer empty, but we have more IB entries to read
const CommandListHeader& command_list_header{dma_pushbuffer.front()};
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;
dma_pushbuffer.pop();
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 {};

10
src/video_core/dma_pusher.h
View file

@ -4,6 +4,7 @@
#pragma once
#include <vector>
#include <queue>
#include "common/bit_field.h"
@ -45,6 +46,8 @@ static_assert(sizeof(CommandHeader) == sizeof(u32), "CommandHeader has incorrect
class GPU;
using CommandList = std::vector<Tegra::CommandListHeader>;
/**
* The DmaPusher class implements DMA submission to FIFOs, providing an area of memory that the
* emulated app fills with commands and tells PFIFO to process. The pushbuffers are then assembled
@ -57,8 +60,8 @@ public:
explicit DmaPusher(GPU& gpu);
~DmaPusher();
void Push(const CommandListHeader& command_list_header) {
dma_pushbuffer.push(command_list_header);
void Push(CommandList&& entries) {
dma_pushbuffer.push(std::move(entries));
}
void DispatchCalls();
@ -72,7 +75,8 @@ private:
GPU& gpu;
std::queue<CommandListHeader> dma_pushbuffer;
std::queue<CommandList> dma_pushbuffer; ///< Queue of command lists to be processed
std::size_t dma_pushbuffer_subindex{}; ///< Index within a command list within the pushbuffer
struct DmaState {
u32 method; ///< Current method