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graphics: share temporary staging for oversized image uploads

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This commit is contained in:
nmzik
2026-10-13 00:28:17 +02:00
parent ed1195d1e7
commit 9bcf80bf67
2 changed files with 116 additions and 23 deletions
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src/graphics/host_gpu/renderer/cache/bufferCache.cpp
Vendored
+31 -23
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@@ -27,6 +27,26 @@ namespace {
constexpr uint64_t MiB = 1024 * 1024;
constexpr uint64_t GdsBufferSize = 64 * 1024;
std::pair<Buffer*, uint64_t> UploadMemory(GraphicContext& graphics, CommandScheduler& scheduler,
StreamBuffer& staging, uint64_t size, uint64_t alignment,
vk::BufferUsageFlags usage, const auto& write) {
const auto [mapped, offset] = staging.Map(size, alignment);
if (mapped != nullptr) {
write(mapped, offset);
staging.Commit();
return {&staging, offset};
}
// Large transfers use the same one-time host allocation as ordinary buffer uploads.
auto temporary = std::make_unique<Buffer>(graphics, scheduler, MemoryUsage::Upload, 0,
usage, size);
write(temporary->Mapped().data(), 0);
temporary->Flush(0, size);
auto* buffer = temporary.get();
scheduler.DeferOperation([owner = std::move(temporary)]() mutable { owner.reset(); });
return {buffer, 0};
}
} // namespace
void BufferCache::WriteDataBuffer(Buffer& buffer, uint64_t address, const void* source,
@@ -447,28 +467,15 @@ vk::Buffer BufferCache::UploadCopies(Buffer& buffer, std::span<vk::BufferCopy> c
return nullptr;
}
auto [mapped, base_offset] = m_staging_buffer.Map(total_size, 4);
if (mapped != nullptr) {
const auto source = UploadMemory(m_graphics, m_scheduler, m_staging_buffer, total_size, 4,
vk::BufferUsageFlagBits::eTransferSrc, [&](uint8_t* mapped, uint64_t base_offset) {
for (auto& copy: copies) {
const auto address = buffer.CpuAddress() + copy.dstOffset;
std::memcpy(mapped + copy.srcOffset, reinterpret_cast<const void*>(address), copy.size);
copy.srcOffset += base_offset;
}
m_staging_buffer.Commit();
return m_staging_buffer.Handle();
}
auto temporary = std::make_unique<Buffer>(m_graphics, m_scheduler, MemoryUsage::Upload, 0,
vk::BufferUsageFlagBits::eTransferSrc, total_size);
for (const auto& copy: copies) {
const auto address = buffer.CpuAddress() + copy.dstOffset;
std::memcpy(temporary->Mapped().data() + copy.srcOffset,
reinterpret_cast<const void*>(address), copy.size);
}
temporary->Flush(0, total_size);
const auto handle = temporary->Handle();
m_scheduler.DeferOperation([owner = std::move(temporary)]() mutable { owner.reset(); });
return handle;
});
return source.first->Handle();
}
std::pair<Buffer*, uint64_t> BufferCache::ObtainBuffer(uint64_t vaddr, uint64_t size,
@@ -521,12 +528,13 @@ std::pair<Buffer*, uint64_t> BufferCache::ObtainBufferForImage(uint64_t vaddr, u
return ObtainBuffer(vaddr, size, false, false);
}
auto [staging, stage_offset] = m_staging_buffer.Map(size, 16);
if (staging == nullptr || !Libs::LibKernel::Memory::TryReadSparseBacking(vaddr, staging, size)) {
EXIT("BufferCache: failed to read mapped guest image backing\n");
}
m_staging_buffer.Commit();
return {&m_staging_buffer, stage_offset};
return UploadMemory(m_graphics, m_scheduler, m_staging_buffer, size, 16,
vk::BufferUsageFlagBits::eTransferSrc | vk::BufferUsageFlagBits::eStorageBuffer,
[&](uint8_t* mapped, uint64_t) {
if (!Libs::LibKernel::Memory::TryReadSparseBacking(vaddr, mapped, size)) {
EXIT("BufferCache: failed to read mapped guest image backing\n");
}
});
}
void BufferCache::FillBuffer(uint64_t vaddr, uint64_t size, uint32_t value, bool is_gds) {