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Accelerate DMA: Use texture cache async downloads to perform the copies

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WIP
This commit is contained in:
Fernando Sahmkow 2023-04-14 18:07:38 +02:00
parent 3fbee093b2
commit e3a2ca96bd
6 changed files with 123 additions and 53 deletions
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118
src/video_core/texture_cache/texture_cache.h
View file

@ -661,27 +661,40 @@ template <class P>
void TextureCache<P>::CommitAsyncFlushes() {
// This is intentionally passing the value by copy
if constexpr (IMPLEMENTS_ASYNC_DOWNLOADS) {
const std::span<const ImageId> download_ids = uncommitted_downloads;
auto& download_ids = uncommitted_downloads;
if (download_ids.empty()) {
committed_downloads.emplace_back(std::move(uncommitted_downloads));
uncommitted_downloads.clear();
async_buffers.emplace_back(std::optional<AsyncBuffer>{});
async_buffers.emplace_back(std::move(uncommitted_async_buffers));
uncommitted_async_buffers.clear();
return;
}
size_t total_size_bytes = 0;
for (const ImageId image_id : download_ids) {
total_size_bytes += slot_images[image_id].unswizzled_size_bytes;
size_t last_async_buffer_id = uncommitted_async_buffers.size();
bool any_none_dma = false;
for (PendingDownload& download_info : download_ids) {
if (download_info.is_swizzle) {
total_size_bytes += slot_images[download_info.object_id].unswizzled_size_bytes;
any_none_dma = true;
download_info.async_buffer_id = last_async_buffer_id;
}
}
auto download_map = runtime.DownloadStagingBuffer(total_size_bytes, true);
for (const ImageId image_id : download_ids) {
Image& image = slot_images[image_id];
const auto copies = FullDownloadCopies(image.info);
image.DownloadMemory(download_map, copies);
download_map.offset += Common::AlignUp(image.unswizzled_size_bytes, 64);
if (any_none_dma) {
auto download_map = runtime.DownloadStagingBuffer(total_size_bytes, true);
for (const PendingDownload& download_info : download_ids) {
if (download_info.is_swizzle) {
Image& image = slot_images[download_info.object_id];
const auto copies = FullDownloadCopies(image.info);
image.DownloadMemory(download_map, copies);
download_map.offset += Common::AlignUp(image.unswizzled_size_bytes, 64);
}
}
uncommitted_async_buffers.emplace_back(download_map);
}
async_buffers.emplace_back(download_map);
}
committed_downloads.emplace_back(std::move(uncommitted_downloads));
async_buffers.emplace_back(std::move(uncommitted_async_buffers));
uncommitted_async_buffers.clear();
uncommitted_downloads.clear();
}
@ -691,39 +704,57 @@ void TextureCache<P>::PopAsyncFlushes() {
return;
}
if constexpr (IMPLEMENTS_ASYNC_DOWNLOADS) {
const std::span<const ImageId> download_ids = committed_downloads.front();
const auto& download_ids = committed_downloads.front();
if (download_ids.empty()) {
committed_downloads.pop_front();
async_buffers.pop_front();
return;
}
auto download_map = *async_buffers.front();
std::span<u8> download_span = download_map.mapped_span;
auto download_map = std::move(async_buffers.front());
for (size_t i = download_ids.size(); i > 0; i--) {
const ImageBase& image = slot_images[download_ids[i - 1]];
const auto copies = FullDownloadCopies(image.info);
download_map.offset -= Common::AlignUp(image.unswizzled_size_bytes, 64);
std::span<u8> download_span_alt = download_span.subspan(download_map.offset);
SwizzleImage(*gpu_memory, image.gpu_addr, image.info, copies, download_span_alt,
swizzle_data_buffer);
auto& download_info = download_ids[i - 1];
auto& download_buffer = download_map[download_info.async_buffer_id];
if (download_info.is_swizzle) {
const ImageBase& image = slot_images[download_info.object_id];
const auto copies = FullDownloadCopies(image.info);
download_buffer.offset -= Common::AlignUp(image.unswizzled_size_bytes, 64);
std::span<u8> download_span =
download_buffer.mapped_span.subspan(download_buffer.offset);
SwizzleImage(*gpu_memory, image.gpu_addr, image.info, copies, download_span,
swizzle_data_buffer);
} else {
const BufferDownload& buffer_info = slot_buffer_downloads[download_info.object_id];
std::span<u8> download_span =
download_buffer.mapped_span.subspan(download_buffer.offset);
gpu_memory->WriteBlockUnsafe(buffer_info.address, download_span.data(),
buffer_info.size);
slot_buffer_downloads.erase(download_info.object_id);
}
}
for (auto& download_buffer : download_map) {
runtime.FreeDeferredStagingBuffer(download_buffer);
}
runtime.FreeDeferredStagingBuffer(download_map);
committed_downloads.pop_front();
async_buffers.pop_front();
} else {
const std::span<const ImageId> download_ids = committed_downloads.front();
const auto& download_ids = committed_downloads.front();
if (download_ids.empty()) {
committed_downloads.pop_front();
return;
}
size_t total_size_bytes = 0;
for (const ImageId image_id : download_ids) {
total_size_bytes += slot_images[image_id].unswizzled_size_bytes;
for (const PendingDownload& download_info : download_ids) {
if (download_info.is_swizzle) {
total_size_bytes += slot_images[download_info.object_id].unswizzled_size_bytes;
}
}
auto download_map = runtime.DownloadStagingBuffer(total_size_bytes);
const size_t original_offset = download_map.offset;
for (const ImageId image_id : download_ids) {
Image& image = slot_images[image_id];
for (const PendingDownload& download_info : download_ids) {
if (download_info.is_swizzle) {
continue;
}
Image& image = slot_images[download_info.object_id];
const auto copies = FullDownloadCopies(image.info);
image.DownloadMemory(download_map, copies);
download_map.offset += image.unswizzled_size_bytes;
@ -732,8 +763,11 @@ void TextureCache<P>::PopAsyncFlushes() {
runtime.Finish();
download_map.offset = original_offset;
std::span<u8> download_span = download_map.mapped_span;
for (const ImageId image_id : download_ids) {
const ImageBase& image = slot_images[image_id];
for (const PendingDownload& download_info : download_ids) {
if (download_info.is_swizzle) {
continue;
}
const ImageBase& image = slot_images[download_info.object_id];
const auto copies = FullDownloadCopies(image.info);
SwizzleImage(*gpu_memory, image.gpu_addr, image.info, copies, download_span,
swizzle_data_buffer);
@ -836,11 +870,27 @@ std::pair<typename TextureCache<P>::Image*, BufferImageCopy> TextureCache<P>::Dm
template <class P>
void TextureCache<P>::DownloadImageIntoBuffer(
typename TextureCache<P>::Image* image, typename TextureCache<P>::BufferType buffer,
size_t buffer_offset, std::span<const VideoCommon::BufferImageCopy> copies) {
std::array buffers{
buffer,
};
image->DownloadMemory(buffers, buffer_offset, copies);
size_t buffer_offset, std::span<const VideoCommon::BufferImageCopy> copies, GPUVAddr address, size_t size) {
if constexpr (IMPLEMENTS_ASYNC_DOWNLOADS) {
auto slot = slot_buffer_downloads.insert(address, size);
uncommitted_downloads.emplace_back(false, uncommitted_async_buffers.size(), slot);
auto download_map = runtime.DownloadStagingBuffer(size, true);
uncommitted_async_buffers.emplace_back(download_map);
std::array buffers{
buffer,
download_map.buffer,
};
std::array buffer_offsets{
buffer_offset,
download_map.offset,
};
image->DownloadMemory(buffers, buffer_offsets, copies);
} else {
std::array buffers{
buffer,
};
image->DownloadMemory(buffers, buffer_offset, copies);
}
}
template <class P>
@ -2219,7 +2269,7 @@ void TextureCache<P>::BindRenderTarget(ImageViewId* old_id, ImageViewId new_id)
if (new_id) {
const ImageViewBase& old_view = slot_image_views[new_id];
if (True(old_view.flags & ImageViewFlagBits::PreemtiveDownload)) {
uncommitted_downloads.push_back(old_view.image_id);
uncommitted_downloads.emplace_back(true, 0, old_view.image_id);
}
}
*old_id = new_id;

23
src/video_core/texture_cache/texture_cache_base.h
View file

@ -217,7 +217,8 @@ public:
const Tegra::DMA::ImageOperand& image_operand, ImageId image_id, bool modifies_image);
void DownloadImageIntoBuffer(Image* image, BufferType buffer, size_t buffer_offset,
std::span<const VideoCommon::BufferImageCopy> copies);
std::span<const VideoCommon::BufferImageCopy> copies,
GPUVAddr address = 0, size_t size = 0);
/// Return true when a CPU region is modified from the GPU
[[nodiscard]] bool IsRegionGpuModified(VAddr addr, size_t size);
@ -428,17 +429,31 @@ private:
u64 critical_memory;
size_t critical_gc;
struct BufferDownload {
GPUVAddr address;
size_t size;
};
struct PendingDownload {
bool is_swizzle;
size_t async_buffer_id;
SlotId object_id;
};
SlotVector<Image> slot_images;
SlotVector<ImageMapView> slot_map_views;
SlotVector<ImageView> slot_image_views;
SlotVector<ImageAlloc> slot_image_allocs;
SlotVector<Sampler> slot_samplers;
SlotVector<Framebuffer> slot_framebuffers;
SlotVector<BufferDownload> slot_buffer_downloads;
// TODO: This data structure is not optimal and it should be reworked
std::vector<ImageId> uncommitted_downloads;
std::deque<std::vector<ImageId>> committed_downloads;
std::deque<std::optional<AsyncBuffer>> async_buffers;
std::vector<PendingDownload> uncommitted_downloads;
std::deque<std::vector<PendingDownload>> committed_downloads;
std::vector<AsyncBuffer> uncommitted_async_buffers;
std::deque<std::vector<AsyncBuffer>> async_buffers;
struct LRUItemParams {
using ObjectType = ImageId;