From 4aa9779ae1aa1b7a424c768331eb9286e7613e19 Mon Sep 17 00:00:00 2001 From: bunnei Date: Wed, 31 Oct 2018 22:20:37 -0400 Subject: [PATCH] memory_manager: Do not MapBufferEx over already in use memory. - This fixes rendering when changing areas in Super Mario Odyssey. --- src/video_core/memory_manager.cpp | 75 ++++++++++++++++++++----------- src/video_core/memory_manager.h | 8 ++-- 2 files changed, 52 insertions(+), 31 deletions(-) diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp index 90a8e825d4..77a20bb847 100644 --- a/src/video_core/memory_manager.cpp +++ b/src/video_core/memory_manager.cpp @@ -4,18 +4,21 @@ #include "common/alignment.h" #include "common/assert.h" +#include "common/logging/log.h" #include "video_core/memory_manager.h" namespace Tegra { GPUVAddr MemoryManager::AllocateSpace(u64 size, u64 align) { - std::optional gpu_addr = FindFreeBlock(size, align); - ASSERT(gpu_addr); + const std::optional gpu_addr{FindFreeBlock(0, size, align, PageStatus::Unmapped)}; - for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { - VAddr& slot = PageSlot(*gpu_addr + offset); + ASSERT_MSG(gpu_addr, "unable to find available GPU memory"); + + for (u64 offset{}; offset < size; offset += PAGE_SIZE) { + VAddr& slot{PageSlot(*gpu_addr + offset)}; ASSERT(slot == static_cast(PageStatus::Unmapped)); + slot = static_cast(PageStatus::Allocated); } @@ -23,10 +26,11 @@ GPUVAddr MemoryManager::AllocateSpace(u64 size, u64 align) { } GPUVAddr MemoryManager::AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align) { - for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { - VAddr& slot = PageSlot(gpu_addr + offset); + for (u64 offset{}; offset < size; offset += PAGE_SIZE) { + VAddr& slot{PageSlot(gpu_addr + offset)}; ASSERT(slot == static_cast(PageStatus::Unmapped)); + slot = static_cast(PageStatus::Allocated); } @@ -34,17 +38,19 @@ GPUVAddr MemoryManager::AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align) { } GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, u64 size) { - std::optional gpu_addr = FindFreeBlock(size, PAGE_SIZE); - ASSERT(gpu_addr); + const std::optional gpu_addr{FindFreeBlock(0, size, PAGE_SIZE, PageStatus::Unmapped)}; - for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { - VAddr& slot = PageSlot(*gpu_addr + offset); + ASSERT_MSG(gpu_addr, "unable to find available GPU memory"); + + for (u64 offset{}; offset < size; offset += PAGE_SIZE) { + VAddr& slot{PageSlot(*gpu_addr + offset)}; ASSERT(slot == static_cast(PageStatus::Unmapped)); + slot = cpu_addr + offset; } - MappedRegion region{cpu_addr, *gpu_addr, size}; + const MappedRegion region{cpu_addr, *gpu_addr, size}; mapped_regions.push_back(region); return *gpu_addr; @@ -53,14 +59,31 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, u64 size) { GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size) { ASSERT((gpu_addr & PAGE_MASK) == 0); - for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { - VAddr& slot = PageSlot(gpu_addr + offset); + if (PageSlot(gpu_addr) != static_cast(PageStatus::Allocated)) { + // Page has been already mapped. In this case, we must find a new area of memory to use that + // is different than the specified one. Super Mario Odyssey hits this scenario when changing + // areas, but we do not want to overwrite the old pages. + // TODO(bunnei): We need to write a hardware test to confirm this behavior. + + LOG_ERROR(HW_GPU, "attempting to map addr 0x{:016X}, which is not available!", gpu_addr); + + const std::optional new_gpu_addr{ + FindFreeBlock(gpu_addr, size, PAGE_SIZE, PageStatus::Allocated)}; + + ASSERT_MSG(new_gpu_addr, "unable to find available GPU memory"); + + gpu_addr = *new_gpu_addr; + } + + for (u64 offset{}; offset < size; offset += PAGE_SIZE) { + VAddr& slot{PageSlot(gpu_addr + offset)}; ASSERT(slot == static_cast(PageStatus::Allocated)); + slot = cpu_addr + offset; } - MappedRegion region{cpu_addr, gpu_addr, size}; + const MappedRegion region{cpu_addr, gpu_addr, size}; mapped_regions.push_back(region); return gpu_addr; @@ -69,11 +92,12 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size) GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) { ASSERT((gpu_addr & PAGE_MASK) == 0); - for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { - VAddr& slot = PageSlot(gpu_addr + offset); + for (u64 offset{}; offset < size; offset += PAGE_SIZE) { + VAddr& slot{PageSlot(gpu_addr + offset)}; ASSERT(slot != static_cast(PageStatus::Allocated) && slot != static_cast(PageStatus::Unmapped)); + slot = static_cast(PageStatus::Unmapped); } @@ -97,13 +121,14 @@ GPUVAddr MemoryManager::GetRegionEnd(GPUVAddr region_start) const { return {}; } -std::optional MemoryManager::FindFreeBlock(u64 size, u64 align) { - GPUVAddr gpu_addr = 0; - u64 free_space = 0; +std::optional MemoryManager::FindFreeBlock(GPUVAddr region_start, u64 size, u64 align, + PageStatus status) { + GPUVAddr gpu_addr{region_start}; + u64 free_space{}; align = (align + PAGE_MASK) & ~PAGE_MASK; while (gpu_addr + free_space < MAX_ADDRESS) { - if (!IsPageMapped(gpu_addr + free_space)) { + if (PageSlot(gpu_addr + free_space) == static_cast(status)) { free_space += PAGE_SIZE; if (free_space >= size) { return gpu_addr; @@ -119,7 +144,7 @@ std::optional MemoryManager::FindFreeBlock(u64 size, u64 align) { } std::optional MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) { - VAddr base_addr = PageSlot(gpu_addr); + const VAddr base_addr{PageSlot(gpu_addr)}; if (base_addr == static_cast(PageStatus::Allocated) || base_addr == static_cast(PageStatus::Unmapped)) { @@ -133,19 +158,15 @@ std::vector MemoryManager::CpuToGpuAddress(VAddr cpu_addr) const { std::vector results; for (const auto& region : mapped_regions) { if (cpu_addr >= region.cpu_addr && cpu_addr < (region.cpu_addr + region.size)) { - u64 offset = cpu_addr - region.cpu_addr; + const u64 offset{cpu_addr - region.cpu_addr}; results.push_back(region.gpu_addr + offset); } } return results; } -bool MemoryManager::IsPageMapped(GPUVAddr gpu_addr) { - return PageSlot(gpu_addr) != static_cast(PageStatus::Unmapped); -} - VAddr& MemoryManager::PageSlot(GPUVAddr gpu_addr) { - auto& block = page_table[(gpu_addr >> (PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK]; + auto& block{page_table[(gpu_addr >> (PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK]}; if (!block) { block = std::make_unique(); block->fill(static_cast(PageStatus::Unmapped)); diff --git a/src/video_core/memory_manager.h b/src/video_core/memory_manager.h index b1255fd560..4eb338aa24 100644 --- a/src/video_core/memory_manager.h +++ b/src/video_core/memory_manager.h @@ -34,15 +34,15 @@ public: static constexpr u64 PAGE_MASK = PAGE_SIZE - 1; private: - std::optional FindFreeBlock(u64 size, u64 align = 1); - bool IsPageMapped(GPUVAddr gpu_addr); - VAddr& PageSlot(GPUVAddr gpu_addr); - enum class PageStatus : u64 { Unmapped = 0xFFFFFFFFFFFFFFFFULL, Allocated = 0xFFFFFFFFFFFFFFFEULL, }; + std::optional FindFreeBlock(GPUVAddr region_start, u64 size, u64 align, + PageStatus status); + VAddr& PageSlot(GPUVAddr gpu_addr); + static constexpr u64 MAX_ADDRESS{0x10000000000ULL}; static constexpr u64 PAGE_TABLE_BITS{10}; static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS};