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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <optional>
#include <tuple>
#include <vector>
#include "common/alignment.h"
#include "common/assert.h"
#include "video_core/renderer_vulkan/declarations.h"
#include "video_core/renderer_vulkan/vk_device.h"
#include "video_core/renderer_vulkan/vk_resource_manager.h"
#include "video_core/renderer_vulkan/vk_scheduler.h"
#include "video_core/renderer_vulkan/vk_stream_buffer.h"
namespace Vulkan {
namespace {
constexpr u64 WATCHES_INITIAL_RESERVE = 0x4000;
constexpr u64 WATCHES_RESERVE_CHUNK = 0x1000;
constexpr u64 STREAM_BUFFER_SIZE = 256 * 1024 * 1024;
std::optional<u32> FindMemoryType(const VKDevice& device, u32 filter,
vk::MemoryPropertyFlags wanted) {
const auto properties = device.GetPhysical().getMemoryProperties(device.GetDispatchLoader());
for (u32 i = 0; i < properties.memoryTypeCount; i++) {
if (!(filter & (1 << i))) {
continue;
}
if ((properties.memoryTypes[i].propertyFlags & wanted) == wanted) {
return i;
}
}
return {};
}
} // Anonymous namespace
VKStreamBuffer::VKStreamBuffer(const VKDevice& device, VKScheduler& scheduler,
vk::BufferUsageFlags usage)
: device{device}, scheduler{scheduler} {
CreateBuffers(usage);
ReserveWatches(current_watches, WATCHES_INITIAL_RESERVE);
ReserveWatches(previous_watches, WATCHES_INITIAL_RESERVE);
}
VKStreamBuffer::~VKStreamBuffer() = default;
std::tuple<u8*, u64, bool> VKStreamBuffer::Map(u64 size, u64 alignment) {
ASSERT(size <= STREAM_BUFFER_SIZE);
mapped_size = size;
if (alignment > 0) {
offset = Common::AlignUp(offset, alignment);
}
WaitPendingOperations(offset);
bool invalidated = false;
if (offset + size > STREAM_BUFFER_SIZE) {
// The buffer would overflow, save the amount of used watches and reset the state.
invalidation_mark = current_watch_cursor;
current_watch_cursor = 0;
offset = 0;
// Swap watches and reset waiting cursors.
std::swap(previous_watches, current_watches);
wait_cursor = 0;
wait_bound = 0;
// Ensure that we don't wait for uncommitted fences.
scheduler.Flush();
invalidated = true;
}
const auto dev = device.GetLogical();
const auto& dld = device.GetDispatchLoader();
const auto pointer = reinterpret_cast<u8*>(dev.mapMemory(*memory, offset, size, {}, dld));
return {pointer, offset, invalidated};
}
void VKStreamBuffer::Unmap(u64 size) {
ASSERT_MSG(size <= mapped_size, "Reserved size is too small");
const auto dev = device.GetLogical();
dev.unmapMemory(*memory, device.GetDispatchLoader());
offset += size;
if (current_watch_cursor + 1 >= current_watches.size()) {
// Ensure that there are enough watches.
ReserveWatches(current_watches, WATCHES_RESERVE_CHUNK);
}
auto& watch = current_watches[current_watch_cursor++];
watch.upper_bound = offset;
watch.fence.Watch(scheduler.GetFence());
}
void VKStreamBuffer::CreateBuffers(vk::BufferUsageFlags usage) {
const vk::BufferCreateInfo buffer_ci({}, STREAM_BUFFER_SIZE, usage, vk::SharingMode::eExclusive,
0, nullptr);
const auto dev = device.GetLogical();
const auto& dld = device.GetDispatchLoader();
buffer = dev.createBufferUnique(buffer_ci, nullptr, dld);
const auto requirements = dev.getBufferMemoryRequirements(*buffer, dld);
// Prefer device local host visible allocations (this should hit AMD's pinned memory).
auto type = FindMemoryType(device, requirements.memoryTypeBits,
vk::MemoryPropertyFlagBits::eHostVisible |
vk::MemoryPropertyFlagBits::eHostCoherent |
vk::MemoryPropertyFlagBits::eDeviceLocal);
if (!type) {
// Otherwise search for a host visible allocation.
type = FindMemoryType(device, requirements.memoryTypeBits,
vk::MemoryPropertyFlagBits::eHostVisible |
vk::MemoryPropertyFlagBits::eHostCoherent);
ASSERT_MSG(type, "No host visible and coherent memory type found");
}
const vk::MemoryAllocateInfo alloc_ci(requirements.size, *type);
memory = dev.allocateMemoryUnique(alloc_ci, nullptr, dld);
dev.bindBufferMemory(*buffer, *memory, 0, dld);
}
void VKStreamBuffer::ReserveWatches(std::vector<Watch>& watches, std::size_t grow_size) {
watches.resize(watches.size() + grow_size);
}
void VKStreamBuffer::WaitPendingOperations(u64 requested_upper_bound) {
if (!invalidation_mark) {
return;
}
while (requested_upper_bound < wait_bound && wait_cursor < *invalidation_mark) {
auto& watch = previous_watches[wait_cursor];
wait_bound = watch.upper_bound;
watch.fence.Wait();
++wait_cursor;
}
}
} // namespace Vulkan
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