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Merge pull request #1630 from bunnei/fix-mapbufferex
memory_manager: Do not MapBufferEx over already in use memory.
This commit is contained in:
commit
81ff9e2473
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@ -4,18 +4,21 @@
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#include "common/alignment.h"
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "video_core/memory_manager.h"
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namespace Tegra {
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GPUVAddr MemoryManager::AllocateSpace(u64 size, u64 align) {
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std::optional<GPUVAddr> gpu_addr = FindFreeBlock(size, align);
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ASSERT(gpu_addr);
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const std::optional<GPUVAddr> gpu_addr{FindFreeBlock(0, size, align, PageStatus::Unmapped)};
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for (u64 offset = 0; offset < size; offset += PAGE_SIZE) {
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VAddr& slot = PageSlot(*gpu_addr + offset);
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ASSERT_MSG(gpu_addr, "unable to find available GPU memory");
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for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
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VAddr& slot{PageSlot(*gpu_addr + offset)};
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ASSERT(slot == static_cast<u64>(PageStatus::Unmapped));
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slot = static_cast<u64>(PageStatus::Allocated);
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}
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@ -23,10 +26,11 @@ GPUVAddr MemoryManager::AllocateSpace(u64 size, u64 align) {
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}
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GPUVAddr MemoryManager::AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align) {
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for (u64 offset = 0; offset < size; offset += PAGE_SIZE) {
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VAddr& slot = PageSlot(gpu_addr + offset);
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for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
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VAddr& slot{PageSlot(gpu_addr + offset)};
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ASSERT(slot == static_cast<u64>(PageStatus::Unmapped));
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slot = static_cast<u64>(PageStatus::Allocated);
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}
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@ -34,17 +38,19 @@ GPUVAddr MemoryManager::AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align) {
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}
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GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, u64 size) {
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std::optional<GPUVAddr> gpu_addr = FindFreeBlock(size, PAGE_SIZE);
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ASSERT(gpu_addr);
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const std::optional<GPUVAddr> gpu_addr{FindFreeBlock(0, size, PAGE_SIZE, PageStatus::Unmapped)};
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for (u64 offset = 0; offset < size; offset += PAGE_SIZE) {
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VAddr& slot = PageSlot(*gpu_addr + offset);
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ASSERT_MSG(gpu_addr, "unable to find available GPU memory");
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for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
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VAddr& slot{PageSlot(*gpu_addr + offset)};
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ASSERT(slot == static_cast<u64>(PageStatus::Unmapped));
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slot = cpu_addr + offset;
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}
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MappedRegion region{cpu_addr, *gpu_addr, size};
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const MappedRegion region{cpu_addr, *gpu_addr, size};
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mapped_regions.push_back(region);
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return *gpu_addr;
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@ -53,14 +59,31 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, u64 size) {
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GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size) {
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ASSERT((gpu_addr & PAGE_MASK) == 0);
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for (u64 offset = 0; offset < size; offset += PAGE_SIZE) {
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VAddr& slot = PageSlot(gpu_addr + offset);
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if (PageSlot(gpu_addr) != static_cast<u64>(PageStatus::Allocated)) {
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// Page has been already mapped. In this case, we must find a new area of memory to use that
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// is different than the specified one. Super Mario Odyssey hits this scenario when changing
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// areas, but we do not want to overwrite the old pages.
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// TODO(bunnei): We need to write a hardware test to confirm this behavior.
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LOG_ERROR(HW_GPU, "attempting to map addr 0x{:016X}, which is not available!", gpu_addr);
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const std::optional<GPUVAddr> new_gpu_addr{
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FindFreeBlock(gpu_addr, size, PAGE_SIZE, PageStatus::Allocated)};
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ASSERT_MSG(new_gpu_addr, "unable to find available GPU memory");
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gpu_addr = *new_gpu_addr;
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}
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for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
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VAddr& slot{PageSlot(gpu_addr + offset)};
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ASSERT(slot == static_cast<u64>(PageStatus::Allocated));
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slot = cpu_addr + offset;
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}
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MappedRegion region{cpu_addr, gpu_addr, size};
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const MappedRegion region{cpu_addr, gpu_addr, size};
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mapped_regions.push_back(region);
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return gpu_addr;
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@ -69,11 +92,12 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size)
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GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) {
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ASSERT((gpu_addr & PAGE_MASK) == 0);
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for (u64 offset = 0; offset < size; offset += PAGE_SIZE) {
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VAddr& slot = PageSlot(gpu_addr + offset);
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for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
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VAddr& slot{PageSlot(gpu_addr + offset)};
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ASSERT(slot != static_cast<u64>(PageStatus::Allocated) &&
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slot != static_cast<u64>(PageStatus::Unmapped));
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slot = static_cast<u64>(PageStatus::Unmapped);
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}
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@ -97,13 +121,14 @@ GPUVAddr MemoryManager::GetRegionEnd(GPUVAddr region_start) const {
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return {};
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}
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std::optional<GPUVAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) {
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GPUVAddr gpu_addr = 0;
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u64 free_space = 0;
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std::optional<GPUVAddr> MemoryManager::FindFreeBlock(GPUVAddr region_start, u64 size, u64 align,
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PageStatus status) {
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GPUVAddr gpu_addr{region_start};
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u64 free_space{};
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align = (align + PAGE_MASK) & ~PAGE_MASK;
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while (gpu_addr + free_space < MAX_ADDRESS) {
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if (!IsPageMapped(gpu_addr + free_space)) {
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if (PageSlot(gpu_addr + free_space) == static_cast<u64>(status)) {
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free_space += PAGE_SIZE;
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if (free_space >= size) {
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return gpu_addr;
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@ -119,7 +144,7 @@ std::optional<GPUVAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) {
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}
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std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) {
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VAddr base_addr = PageSlot(gpu_addr);
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const VAddr base_addr{PageSlot(gpu_addr)};
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if (base_addr == static_cast<u64>(PageStatus::Allocated) ||
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base_addr == static_cast<u64>(PageStatus::Unmapped)) {
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@ -133,19 +158,15 @@ std::vector<GPUVAddr> MemoryManager::CpuToGpuAddress(VAddr cpu_addr) const {
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std::vector<GPUVAddr> results;
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for (const auto& region : mapped_regions) {
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if (cpu_addr >= region.cpu_addr && cpu_addr < (region.cpu_addr + region.size)) {
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u64 offset = cpu_addr - region.cpu_addr;
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const u64 offset{cpu_addr - region.cpu_addr};
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results.push_back(region.gpu_addr + offset);
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}
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}
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return results;
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}
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bool MemoryManager::IsPageMapped(GPUVAddr gpu_addr) {
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return PageSlot(gpu_addr) != static_cast<u64>(PageStatus::Unmapped);
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}
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VAddr& MemoryManager::PageSlot(GPUVAddr gpu_addr) {
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auto& block = page_table[(gpu_addr >> (PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK];
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auto& block{page_table[(gpu_addr >> (PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK]};
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if (!block) {
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block = std::make_unique<PageBlock>();
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block->fill(static_cast<VAddr>(PageStatus::Unmapped));
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@ -34,15 +34,15 @@ public:
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static constexpr u64 PAGE_MASK = PAGE_SIZE - 1;
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private:
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std::optional<GPUVAddr> FindFreeBlock(u64 size, u64 align = 1);
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bool IsPageMapped(GPUVAddr gpu_addr);
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VAddr& PageSlot(GPUVAddr gpu_addr);
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enum class PageStatus : u64 {
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Unmapped = 0xFFFFFFFFFFFFFFFFULL,
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Allocated = 0xFFFFFFFFFFFFFFFEULL,
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};
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std::optional<GPUVAddr> FindFreeBlock(GPUVAddr region_start, u64 size, u64 align,
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PageStatus status);
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VAddr& PageSlot(GPUVAddr gpu_addr);
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static constexpr u64 MAX_ADDRESS{0x10000000000ULL};
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static constexpr u64 PAGE_TABLE_BITS{10};
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static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS};
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