Texture Cache: Initial Implementation of Sparse Textures.

src/video_core/memory_manager.cpp

@@ -127,8 +127,13 @@ void MemoryManager::SetPageEntry(GPUVAddr gpu_addr, PageEntry page_entry, std::s
 
     //// Lock the new page
     // TryLockPage(page_entry, size);
+    auto& current_page = page_table[PageEntryIndex(gpu_addr)];
+    if (current_page.IsValid() != page_entry.IsValid() ||
+        current_page.ToAddress() != page_entry.ToAddress()) {
+        rasterizer->ModifyGPUMemory(gpu_addr, size);
+    }
 
-    page_table[PageEntryIndex(gpu_addr)] = page_entry;
+    current_page = page_entry;
 }
 
 std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size_t align,

src/video_core/rasterizer_interface.h

@@ -87,6 +87,9 @@ public:
     /// Unmap memory range
     virtual void UnmapMemory(VAddr addr, u64 size) = 0;
 
+    /// Unmap memory range
+    virtual void ModifyGPUMemory(GPUVAddr addr, u64 size) = 0;
+
     /// Notify rasterizer that any caches of the specified region should be flushed to Switch memory
     /// and invalidated
     virtual void FlushAndInvalidateRegion(VAddr addr, u64 size) = 0;

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -611,6 +611,13 @@ void RasterizerOpenGL::UnmapMemory(VAddr addr, u64 size) {
     shader_cache.OnCPUWrite(addr, size);
 }
 
+void RasterizerOpenGL::ModifyGPUMemory(GPUVAddr addr, u64 size) {
+    {
+        std::scoped_lock lock{texture_cache.mutex};
+        texture_cache.UnmapGPUMemory(addr, size);
+    }
+}
+
 void RasterizerOpenGL::SignalSemaphore(GPUVAddr addr, u32 value) {
     if (!gpu.IsAsync()) {
         gpu_memory.Write<u32>(addr, value);

src/video_core/renderer_opengl/gl_rasterizer.h

@@ -80,6 +80,7 @@ public:
     void OnCPUWrite(VAddr addr, u64 size) override;
     void SyncGuestHost() override;
     void UnmapMemory(VAddr addr, u64 size) override;
+    void ModifyGPUMemory(GPUVAddr addr, u64 size) override;
     void SignalSemaphore(GPUVAddr addr, u32 value) override;
     void SignalSyncPoint(u32 value) override;
     void ReleaseFences() override;

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -557,6 +557,13 @@ void RasterizerVulkan::UnmapMemory(VAddr addr, u64 size) {
     pipeline_cache.OnCPUWrite(addr, size);
 }
 
+void RasterizerVulkan::ModifyGPUMemory(GPUVAddr addr, u64 size) {
+    {
+        std::scoped_lock lock{texture_cache.mutex};
+        texture_cache.UnmapGPUMemory(addr, size);
+    }
+}
+
 void RasterizerVulkan::SignalSemaphore(GPUVAddr addr, u32 value) {
     if (!gpu.IsAsync()) {
         gpu_memory.Write<u32>(addr, value);

src/video_core/renderer_vulkan/vk_rasterizer.h

@@ -72,6 +72,7 @@ public:
     void OnCPUWrite(VAddr addr, u64 size) override;
     void SyncGuestHost() override;
     void UnmapMemory(VAddr addr, u64 size) override;
+    void ModifyGPUMemory(GPUVAddr addr, u64 size) override;
     void SignalSemaphore(GPUVAddr addr, u32 value) override;
     void SignalSyncPoint(u32 value) override;
     void ReleaseFences() override;

src/video_core/texture_cache/image_base.cpp

@@ -69,6 +69,9 @@ ImageBase::ImageBase(const ImageInfo& info_, GPUVAddr gpu_addr_, VAddr cpu_addr_
     }
 }
 
+ImageMapView::ImageMapView(GPUVAddr gpu_addr_, VAddr cpu_addr_, size_t size_, ImageId image_id_)
+    : gpu_addr{gpu_addr_}, cpu_addr{cpu_addr_}, size{size_}, image_id{image_id_} {}
+
 std::optional<SubresourceBase> ImageBase::TryFindBase(GPUVAddr other_addr) const noexcept {
     if (other_addr < gpu_addr) {
         // Subresource address can't be lower than the base

src/video_core/texture_cache/image_base.h

@@ -57,6 +57,12 @@ struct ImageBase {
         return cpu_addr < overlap_end && overlap_cpu_addr < cpu_addr_end;
     }
 
+    [[nodiscard]] bool OverlapsGPU(GPUVAddr overlap_gpu_addr, size_t overlap_size) const noexcept {
+        const VAddr overlap_end = overlap_gpu_addr + overlap_size;
+        const GPUVAddr gpu_addr_end = gpu_addr + guest_size_bytes;
+        return gpu_addr < overlap_end && overlap_gpu_addr < gpu_addr_end;
+    }
+
     void CheckBadOverlapState();
     void CheckAliasState();
 
@@ -84,6 +90,8 @@ struct ImageBase {
 
     std::vector<AliasedImage> aliased_images;
     std::vector<ImageId> overlapping_images;
+    ImageMapId map_view_id{};
+    bool is_sparse{};
 };
 
 struct ImageAllocBase {

src/video_core/texture_cache/texture_cache.h

@@ -152,6 +152,9 @@ public:
     /// Remove images in a region
     void UnmapMemory(VAddr cpu_addr, size_t size);
 
+    /// Remove images in a region
+    void UnmapGPUMemory(GPUVAddr gpu_addr, size_t size);
+
     /// Blit an image with the given parameters
     void BlitImage(const Tegra::Engines::Fermi2D::Surface& dst,
                    const Tegra::Engines::Fermi2D::Surface& src,
@@ -190,7 +193,22 @@ public:
 private:
     /// Iterate over all page indices in a range
     template <typename Func>
-    static void ForEachPage(VAddr addr, size_t size, Func&& func) {
+    static void ForEachCPUPage(VAddr addr, size_t size, Func&& func) {
+        static constexpr bool RETURNS_BOOL = std::is_same_v<std::invoke_result<Func, u64>, bool>;
+        const u64 page_end = (addr + size - 1) >> PAGE_BITS;
+        for (u64 page = addr >> PAGE_BITS; page <= page_end; ++page) {
+            if constexpr (RETURNS_BOOL) {
+                if (func(page)) {
+                    break;
+                }
+            } else {
+                func(page);
+            }
+        }
+    }
+
+    template <typename Func>
+    static void ForEachGPUPage(GPUVAddr addr, size_t size, Func&& func) {
         static constexpr bool RETURNS_BOOL = std::is_same_v<std::invoke_result<Func, u64>, bool>;
         const u64 page_end = (addr + size - 1) >> PAGE_BITS;
         for (u64 page = addr >> PAGE_BITS; page <= page_end; ++page) {
@@ -269,6 +287,13 @@ private:
     template <typename Func>
     void ForEachImageInRegion(VAddr cpu_addr, size_t size, Func&& func);
 
+    template <typename Func>
+    void ForEachImageInRegionGPU(GPUVAddr gpu_addr, size_t size, Func&& func);
+
+    /// Iterates over all the images in a region calling func
+    template <typename Func>
+    void ForEachSparseSegment(ImageBase& image, Func&& func);
+
     /// Find or create an image view in the given image with the passed parameters
     [[nodiscard]] ImageViewId FindOrEmplaceImageView(ImageId image_id, const ImageViewInfo& info);
 
@@ -340,7 +365,8 @@ private:
     std::unordered_map<TSCEntry, SamplerId> samplers;
     std::unordered_map<RenderTargets, FramebufferId> framebuffers;
 
-    std::unordered_map<u64, std::vector<ImageId>, IdentityHash<u64>> page_table;
+    std::unordered_map<u64, std::vector<ImageMapId>, IdentityHash<u64>> page_table;
+    std::unordered_map<u64, std::vector<ImageId>, IdentityHash<u64>> gpu_page_table;
 
     bool has_deleted_images = false;
     u64 total_used_memory = 0;
@@ -349,6 +375,7 @@ private:
     u64 critical_memory;
 
     SlotVector<Image> slot_images;
+    SlotVector<ImageMapView> slot_map_views;
     SlotVector<ImageView> slot_image_views;
     SlotVector<ImageAlloc> slot_image_allocs;
     SlotVector<Sampler> slot_samplers;
@@ -702,6 +729,21 @@ void TextureCache<P>::UnmapMemory(VAddr cpu_addr, size_t size) {
     }
 }
 
+template <class P>
+void TextureCache<P>::UnmapGPUMemory(GPUVAddr gpu_addr, size_t size) {
+    std::vector<ImageId> deleted_images;
+    ForEachImageInRegionGPU(gpu_addr, size,
+                            [&](ImageId id, Image&) { deleted_images.push_back(id); });
+    for (const ImageId id : deleted_images) {
+        Image& image = slot_images[id];
+        if (True(image.flags & ImageFlagBits::Tracked)) {
+            UntrackImage(image);
+        }
+        UnregisterImage(id);
+        DeleteImage(id);
+    }
+}
+
 template <class P>
 void TextureCache<P>::BlitImage(const Tegra::Engines::Fermi2D::Surface& dst,
                                 const Tegra::Engines::Fermi2D::Surface& src,
@@ -833,9 +875,10 @@ typename P::ImageView* TextureCache<P>::TryFindFramebufferImageView(VAddr cpu_ad
     if (it == page_table.end()) {
         return nullptr;
     }
-    const auto& image_ids = it->second;
+    const auto& image_map_ids = it->second;
-    for (const ImageId image_id : image_ids) {
+    for (const ImageMapId map_id : image_map_ids) {
-        const ImageBase& image = slot_images[image_id];
+        const ImageMapView& map = slot_map_views[map_id];
+        const ImageBase& image = slot_images[map.image_id];
         if (image.cpu_addr != cpu_addr) {
             continue;
         }
@@ -958,7 +1001,7 @@ void TextureCache<P>::UploadImageContents(Image& image, StagingBuffer& staging)
 
 template <class P>
 ImageViewId TextureCache<P>::FindImageView(const TICEntry& config) {
-    if (!IsValidAddress(gpu_memory, config)) {
+    if (!IsValidEntry(gpu_memory, config)) {
         return NULL_IMAGE_VIEW_ID;
     }
     const auto [pair, is_new] = image_views.try_emplace(config);
@@ -1026,7 +1069,7 @@ ImageId TextureCache<P>::FindImage(const ImageInfo& info, GPUVAddr gpu_addr,
         }
         return false;
     };
-    ForEachImageInRegion(*cpu_addr, CalculateGuestSizeInBytes(info), lambda);
+    ForEachImageInRegionGPU(gpu_addr, CalculateGuestSizeInBytes(info), lambda);
     return image_id;
 }
 
@@ -1056,7 +1099,7 @@ ImageId TextureCache<P>::JoinImages(const ImageInfo& info, GPUVAddr gpu_addr, VA
     std::vector<ImageId> left_aliased_ids;
     std::vector<ImageId> right_aliased_ids;
     std::vector<ImageId> bad_overlap_ids;
-    ForEachImageInRegion(cpu_addr, size_bytes, [&](ImageId overlap_id, ImageBase& overlap) {
+    ForEachImageInRegionGPU(gpu_addr, size_bytes, [&](ImageId overlap_id, ImageBase& overlap) {
         if (info.type == ImageType::Linear) {
             if (info.pitch == overlap.info.pitch && gpu_addr == overlap.gpu_addr) {
                 // Alias linear images with the same pitch
@@ -1091,6 +1134,24 @@ ImageId TextureCache<P>::JoinImages(const ImageInfo& info, GPUVAddr gpu_addr, VA
     const ImageId new_image_id = slot_images.insert(runtime, new_info, gpu_addr, cpu_addr);
     Image& new_image = slot_images[new_image_id];
 
+    new_image.is_sparse = false;
+    if (new_image.info.type != ImageType::Linear && new_image.info.type != ImageType::Buffer) {
+        const LevelArray offsets = CalculateMipLevelOffsets(new_image.info);
+        size_t level;
+        const size_t levels = static_cast<size_t>(new_image.info.resources.levels);
+        VAddr n_cpu_addr = new_image.cpu_addr;
+        GPUVAddr n_gpu_addr = new_image.gpu_addr;
+        for (level = 0; level < levels; level++) {
+            n_gpu_addr += offsets[level];
+            n_cpu_addr += offsets[level];
+            std::optional<VAddr> cpu_addr_opt = gpu_memory.GpuToCpuAddress(n_gpu_addr);
+            if (!cpu_addr_opt || *cpu_addr_opt == 0 || n_cpu_addr != *cpu_addr_opt) {
+                new_image.is_sparse = true;
+                break;
+            }
+        }
+    }
+
     // TODO: Only upload what we need
     RefreshContents(new_image);
 
@@ -1239,7 +1300,8 @@ void TextureCache<P>::ForEachImageInRegion(VAddr cpu_addr, size_t size, Func&& f
     using FuncReturn = typename std::invoke_result<Func, ImageId, Image&>::type;
     static constexpr bool BOOL_BREAK = std::is_same_v<FuncReturn, bool>;
     boost::container::small_vector<ImageId, 32> images;
-    ForEachPage(cpu_addr, size, [this, &images, cpu_addr, size, func](u64 page) {
+    boost::container::small_vector<ImageMapId, 32> maps;
+    ForEachCPUPage(cpu_addr, size, [this, &images, &maps, cpu_addr, size, func](u64 page) {
         const auto it = page_table.find(page);
         if (it == page_table.end()) {
             if constexpr (BOOL_BREAK) {
@@ -1248,12 +1310,63 @@ void TextureCache<P>::ForEachImageInRegion(VAddr cpu_addr, size_t size, Func&& f
                 return;
             }
         }
+        for (const ImageMapId map_id : it->second) {
+            ImageMapView& map = slot_map_views[map_id];
+            if (map.picked) {
+                continue;
+            }
+            if (!map.Overlaps(cpu_addr, size)) {
+                continue;
+            }
+            map.picked = true;
+            maps.push_back(map_id);
+            Image& image = slot_images[map.image_id];
+            if (True(image.flags & ImageFlagBits::Picked)) {
+                continue;
+            }
+            image.flags |= ImageFlagBits::Picked;
+            images.push_back(map.image_id);
+            if constexpr (BOOL_BREAK) {
+                if (func(map.image_id, image)) {
+                    return true;
+                }
+            } else {
+                func(map.image_id, image);
+            }
+        }
+        if constexpr (BOOL_BREAK) {
+            return false;
+        }
+    });
+    for (const ImageId image_id : images) {
+        slot_images[image_id].flags &= ~ImageFlagBits::Picked;
+    }
+    for (const ImageMapId map_id : maps) {
+        slot_map_views[map_id].picked = false;
+    }
+}
+
+template <class P>
+template <typename Func>
+void TextureCache<P>::ForEachImageInRegionGPU(GPUVAddr gpu_addr, size_t size, Func&& func) {
+    using FuncReturn = typename std::invoke_result<Func, ImageId, Image&>::type;
+    static constexpr bool BOOL_BREAK = std::is_same_v<FuncReturn, bool>;
+    boost::container::small_vector<ImageId, 8> images;
+    ForEachGPUPage(gpu_addr, size, [this, &images, gpu_addr, size, func](u64 page) {
+        const auto it = gpu_page_table.find(page);
+        if (it == gpu_page_table.end()) {
+            if constexpr (BOOL_BREAK) {
+                return false;
+            } else {
+                return;
+            }
+        }
         for (const ImageId image_id : it->second) {
             Image& image = slot_images[image_id];
             if (True(image.flags & ImageFlagBits::Picked)) {
                 continue;
             }
-            if (!image.Overlaps(cpu_addr, size)) {
+            if (!image.OverlapsGPU(gpu_addr, size)) {
                 continue;
             }
             image.flags |= ImageFlagBits::Picked;
@@ -1275,6 +1388,30 @@ void TextureCache<P>::ForEachImageInRegion(VAddr cpu_addr, size_t size, Func&& f
     }
 }
 
+template <class P>
+template <typename Func>
+void TextureCache<P>::ForEachSparseSegment(ImageBase& image, Func&& func) {
+    using FuncReturn = typename std::invoke_result<Func, GPUVAddr, VAddr, size_t>::type;
+    static constexpr bool BOOL_BREAK = std::is_same_v<FuncReturn, bool>;
+    GPUVAddr gpu_addr = image.gpu_addr;
+    const size_t levels = image.info.resources.levels;
+    const auto mipmap_sizes = CalculateMipLevelSizes(image.info);
+    for (size_t level = 0; level < levels; level++) {
+        const size_t size = mipmap_sizes[level];
+        std::optional<VAddr> cpu_addr = gpu_memory.GpuToCpuAddress(gpu_addr);
+        if (cpu_addr && *cpu_addr != 0) {
+            if constexpr (BOOL_BREAK) {
+                if (func(gpu_addr, *cpu_addr, size)) {
+                    return true;
+                }
+            } else {
+                func(gpu_addr, *cpu_addr, size);
+            }
+        }
+        gpu_addr += size;
+    }
+}
+
 template <class P>
 ImageViewId TextureCache<P>::FindOrEmplaceImageView(ImageId image_id, const ImageViewInfo& info) {
     Image& image = slot_images[image_id];
@@ -1292,8 +1429,6 @@ void TextureCache<P>::RegisterImage(ImageId image_id) {
     ASSERT_MSG(False(image.flags & ImageFlagBits::Registered),
                "Trying to register an already registered image");
     image.flags |= ImageFlagBits::Registered;
-    ForEachPage(image.cpu_addr, image.guest_size_bytes,
-                [this, image_id](u64 page) { page_table[page].push_back(image_id); });
     u64 tentative_size = std::max(image.guest_size_bytes, image.unswizzled_size_bytes);
     if ((IsPixelFormatASTC(image.info.format) &&
          True(image.flags & ImageFlagBits::AcceleratedUpload)) ||
@@ -1301,6 +1436,21 @@ void TextureCache<P>::RegisterImage(ImageId image_id) {
         tentative_size = EstimatedDecompressedSize(tentative_size, image.info.format);
     }
     total_used_memory += Common::AlignUp(tentative_size, 1024);
+    ForEachGPUPage(image.gpu_addr, image.guest_size_bytes,
+                   [this, image_id](u64 page) { gpu_page_table[page].push_back(image_id); });
+    if (!image.is_sparse) {
+        auto map_id =
+            slot_map_views.insert(image.gpu_addr, image.cpu_addr, image.guest_size_bytes, image_id);
+        ForEachCPUPage(image.cpu_addr, image.guest_size_bytes,
+                       [this, map_id](u64 page) { page_table[page].push_back(map_id); });
+        image.map_view_id = map_id;
+        return;
+    }
+    ForEachSparseSegment(image, [this, image_id](GPUVAddr gpu_addr, VAddr cpu_addr, size_t size) {
+        auto map_id = slot_map_views.insert(gpu_addr, cpu_addr, size, image_id);
+        ForEachCPUPage(cpu_addr, size,
+                       [this, map_id](u64 page) { page_table[page].push_back(map_id); });
+    });
 }
 
 template <class P>
@@ -1317,9 +1467,9 @@ void TextureCache<P>::UnregisterImage(ImageId image_id) {
         tentative_size = EstimatedDecompressedSize(tentative_size, image.info.format);
     }
     total_used_memory -= Common::AlignUp(tentative_size, 1024);
-    ForEachPage(image.cpu_addr, image.guest_size_bytes, [this, image_id](u64 page) {
+    ForEachGPUPage(image.gpu_addr, image.guest_size_bytes, [this, image_id](u64 page) {
-        const auto page_it = page_table.find(page);
+        const auto page_it = gpu_page_table.find(page);
-        if (page_it == page_table.end()) {
+        if (page_it == gpu_page_table.end()) {
             UNREACHABLE_MSG("Unregistering unregistered page=0x{:x}", page << PAGE_BITS);
             return;
         }
@@ -1331,20 +1481,84 @@ void TextureCache<P>::UnregisterImage(ImageId image_id) {
         }
         image_ids.erase(vector_it);
     });
+    if (!image.is_sparse) {
+        const auto map_id = image.map_view_id;
+        ForEachCPUPage(image.cpu_addr, image.guest_size_bytes, [this, map_id](u64 page) {
+            const auto page_it = page_table.find(page);
+            if (page_it == page_table.end()) {
+                UNREACHABLE_MSG("Unregistering unregistered page=0x{:x}", page << PAGE_BITS);
+                return;
+            }
+            std::vector<ImageMapId>& image_map_ids = page_it->second;
+            const auto vector_it = std::ranges::find(image_map_ids, map_id);
+            if (vector_it == image_map_ids.end()) {
+                UNREACHABLE_MSG("Unregistering unregistered image in page=0x{:x}",
+                                page << PAGE_BITS);
+                return;
+            }
+            image_map_ids.erase(vector_it);
+        });
+        slot_map_views.erase(map_id);
+        return;
+    }
+    boost::container::small_vector<ImageMapId, 8> maps_to_delete;
+    ForEachSparseSegment(
+        image, [this, image_id, &maps_to_delete]([[maybe_unused]] GPUVAddr gpu_addr, VAddr cpu_addr,
+                                                 size_t size) {
+            ForEachCPUPage(cpu_addr, size, [this, image_id, &maps_to_delete](u64 page) {
+                const auto page_it = page_table.find(page);
+                if (page_it == page_table.end()) {
+                    UNREACHABLE_MSG("Unregistering unregistered page=0x{:x}", page << PAGE_BITS);
+                    return;
+                }
+                std::vector<ImageMapId>& image_map_ids = page_it->second;
+                auto vector_it = image_map_ids.begin();
+                while (vector_it != image_map_ids.end()) {
+                    ImageMapView& map = slot_map_views[*vector_it];
+                    if (map.image_id != image_id) {
+                        vector_it++;
+                        continue;
+                    }
+                    if (!map.picked) {
+                        maps_to_delete.push_back(*vector_it);
+                        map.picked = true;
+                    }
+                    vector_it = image_map_ids.erase(vector_it);
+                }
+            });
+        });
+
+    for (const ImageMapId map_id : maps_to_delete) {
+        slot_map_views.erase(map_id);
+    }
 }
 
 template <class P>
 void TextureCache<P>::TrackImage(ImageBase& image) {
     ASSERT(False(image.flags & ImageFlagBits::Tracked));
     image.flags |= ImageFlagBits::Tracked;
+    if (!image.is_sparse) {
         rasterizer.UpdatePagesCachedCount(image.cpu_addr, image.guest_size_bytes, 1);
+        return;
+    }
+    ForEachSparseSegment(image,
+                         [this]([[maybe_unused]] GPUVAddr gpu_addr, VAddr cpu_addr, size_t size) {
+                             rasterizer.UpdatePagesCachedCount(cpu_addr, size, 1);
+                         });
 }
 
 template <class P>
 void TextureCache<P>::UntrackImage(ImageBase& image) {
     ASSERT(True(image.flags & ImageFlagBits::Tracked));
     image.flags &= ~ImageFlagBits::Tracked;
+    if (!image.is_sparse) {
         rasterizer.UpdatePagesCachedCount(image.cpu_addr, image.guest_size_bytes, -1);
+        return;
+    }
+    ForEachSparseSegment(image,
+                         [this]([[maybe_unused]] GPUVAddr gpu_addr, VAddr cpu_addr, size_t size) {
+                             rasterizer.UpdatePagesCachedCount(cpu_addr, size, -1);
+                         });
 }
 
 template <class P>

src/video_core/texture_cache/types.h

@@ -16,6 +16,7 @@ constexpr size_t MAX_MIP_LEVELS = 14;
 constexpr SlotId CORRUPT_ID{0xfffffffe};
 
 using ImageId = SlotId;
+using ImageMapId = SlotId;
 using ImageViewId = SlotId;
 using ImageAllocId = SlotId;
 using SamplerId = SlotId;

src/video_core/texture_cache/util.cpp

@@ -664,6 +664,16 @@ LevelArray CalculateMipLevelOffsets(const ImageInfo& info) noexcept {
     return offsets;
 }
 
+LevelArray CalculateMipLevelSizes(const ImageInfo& info) noexcept {
+    const u32 num_levels = info.resources.levels;
+    const LevelInfo level_info = MakeLevelInfo(info);
+    LevelArray sizes{};
+    for (u32 level = 0; level < num_levels; ++level) {
+        sizes[level] = CalculateLevelSize(level_info, level);
+    }
+    return sizes;
+}
+
 std::vector<u32> CalculateSliceOffsets(const ImageInfo& info) {
     ASSERT(info.type == ImageType::e3D);
     std::vector<u32> offsets;
@@ -776,14 +786,37 @@ std::vector<ImageCopy> MakeShrinkImageCopies(const ImageInfo& dst, const ImageIn
     return copies;
 }
 
-bool IsValidAddress(const Tegra::MemoryManager& gpu_memory, const TICEntry& config) {
+bool IsValidAddress(const Tegra::MemoryManager& gpu_memory, GPUVAddr gpu_addr) {
-    if (config.Address() == 0) {
+    if (gpu_addr == 0) {
         return false;
     }
-    if (config.Address() > (u64(1) << 48)) {
+    if (gpu_addr > (u64(1) << 48)) {
         return false;
     }
-    return gpu_memory.GpuToCpuAddress(config.Address()).has_value();
+    const auto cpu_addr = gpu_memory.GpuToCpuAddress(gpu_addr);
+    return cpu_addr.has_value() && *cpu_addr != 0;
+}
+
+bool IsValidEntry(const Tegra::MemoryManager& gpu_memory, const TICEntry& config) {
+    const GPUVAddr gpu_addr = config.Address();
+    if (IsValidAddress(gpu_memory, gpu_addr)) {
+        return true;
+    }
+    if (!config.IsBlockLinear()) {
+        return false;
+    }
+    const size_t levels = config.max_mip_level + 1;
+    if (levels <= 1) {
+        return false;
+    }
+    const ImageInfo info{config};
+    const LevelArray offsets = CalculateMipLevelOffsets(info);
+    for (size_t level = 1; level < levels; level++) {
+        if (IsValidAddress(gpu_memory, static_cast<GPUVAddr>(gpu_addr + offsets[level]))) {
+            return true;
+        }
+    }
+    return false;
 }
 
 std::vector<BufferImageCopy> UnswizzleImage(Tegra::MemoryManager& gpu_memory, GPUVAddr gpu_addr,

src/video_core/texture_cache/util.h

@@ -40,6 +40,8 @@ struct OverlapResult {
 
 [[nodiscard]] LevelArray CalculateMipLevelOffsets(const ImageInfo& info) noexcept;
 
+[[nodiscard]] LevelArray CalculateMipLevelSizes(const ImageInfo& info) noexcept;
+
 [[nodiscard]] std::vector<u32> CalculateSliceOffsets(const ImageInfo& info);
 
 [[nodiscard]] std::vector<SubresourceBase> CalculateSliceSubresources(const ImageInfo& info);
@@ -55,7 +57,9 @@ struct OverlapResult {
                                                            const ImageInfo& src,
                                                            SubresourceBase base);
 
-[[nodiscard]] bool IsValidAddress(const Tegra::MemoryManager& gpu_memory, const TICEntry& config);
+[[nodiscard]] bool IsValidAddress(const Tegra::MemoryManager& gpu_memory, GPUVAddr gpu_addr);
+
+[[nodiscard]] bool IsValidEntry(const Tegra::MemoryManager& gpu_memory, const TICEntry& config);
 
 [[nodiscard]] std::vector<BufferImageCopy> UnswizzleImage(Tegra::MemoryManager& gpu_memory,
                                                           GPUVAddr gpu_addr, const ImageInfo& info,