2 files changed, 142 insertions, 88 deletions

diff --git a/src/video_core/renderer_vulkan/vk_memory_manager.cpp b/src/video_core/renderer_vulkan/vk_memory_manager.cpp
index 0451babbf..9cc9979d0 100644
--- a/src/video_core/renderer_vulkan/vk_memory_manager.cpp
+++ b/src/video_core/renderer_vulkan/vk_memory_manager.cpp
@@ -6,6 +6,7 @@
 #include <optional>
 #include <tuple>
 #include <vector>
+
 #include "common/alignment.h"
 #include "common/assert.h"
 #include "common/common_types.h"
@@ -16,34 +17,32 @@
 
 namespace Vulkan {
 
-// TODO(Rodrigo): Fine tune this number
-constexpr u64 ALLOC_CHUNK_SIZE = 64 * 1024 * 1024;
+namespace {
+
+u64 GetAllocationChunkSize(u64 required_size) {
+    static constexpr u64 sizes[] = {16ULL << 20, 32ULL << 20, 64ULL << 20, 128ULL << 20};
+    auto it = std::lower_bound(std::begin(sizes), std::end(sizes), required_size);
+    return it != std::end(sizes) ? *it : Common::AlignUp(required_size, 256ULL << 20);
+}
+
+} // Anonymous namespace
 
 class VKMemoryAllocation final {
 public:
     explicit VKMemoryAllocation(const VKDevice& device, vk::DeviceMemory memory,
-                                vk::MemoryPropertyFlags properties, u64 alloc_size, u32 type)
-        : device{device}, memory{memory}, properties{properties}, alloc_size{alloc_size},
-          shifted_type{ShiftType(type)}, is_mappable{properties &
-                                                     vk::MemoryPropertyFlagBits::eHostVisible} {
-        if (is_mappable) {
-            const auto dev = device.GetLogical();
-            const auto& dld = device.GetDispatchLoader();
-            base_address = static_cast<u8*>(dev.mapMemory(memory, 0, alloc_size, {}, dld));
-        }
-    }
+                                vk::MemoryPropertyFlags properties, u64 allocation_size, u32 type)
+        : device{device}, memory{memory}, properties{properties}, allocation_size{allocation_size},
+          shifted_type{ShiftType(type)} {}
 
     ~VKMemoryAllocation() {
         const auto dev = device.GetLogical();
         const auto& dld = device.GetDispatchLoader();
-        if (is_mappable)
-            dev.unmapMemory(memory, dld);
         dev.free(memory, nullptr, dld);
     }
 
     VKMemoryCommit Commit(vk::DeviceSize commit_size, vk::DeviceSize alignment) {
-        auto found = TryFindFreeSection(free_iterator, alloc_size, static_cast<u64>(commit_size),
-                                        static_cast<u64>(alignment));
+        auto found = TryFindFreeSection(free_iterator, allocation_size,
+                                        static_cast<u64>(commit_size), static_cast<u64>(alignment));
         if (!found) {
             found = TryFindFreeSection(0, free_iterator, static_cast<u64>(commit_size),
                                        static_cast<u64>(alignment));
@@ -52,8 +51,7 @@ public:
                 return nullptr;
             }
         }
-        u8* address = is_mappable ? base_address + *found : nullptr;
-        auto commit = std::make_unique<VKMemoryCommitImpl>(this, memory, address, *found,
+        auto commit = std::make_unique<VKMemoryCommitImpl>(device, this, memory, *found,
                                                            *found + commit_size);
         commits.push_back(commit.get());
 
@@ -65,12 +63,10 @@ public:
 
     void Free(const VKMemoryCommitImpl* commit) {
         ASSERT(commit);
-        const auto it =
-            std::find_if(commits.begin(), commits.end(),
-                         [&](const auto& stored_commit) { return stored_commit == commit; });
+
+        const auto it = std::find(std::begin(commits), std::end(commits), commit);
         if (it == commits.end()) {
-            LOG_CRITICAL(Render_Vulkan, "Freeing unallocated commit!");
-            UNREACHABLE();
+            UNREACHABLE_MSG("Freeing unallocated commit!");
             return;
         }
         commits.erase(it);
@@ -88,11 +84,11 @@ private:
     }
 
     /// A memory allocator, it may return a free region between "start" and "end" with the solicited
-    /// requeriments.
+    /// requirements.
     std::optional<u64> TryFindFreeSection(u64 start, u64 end, u64 size, u64 alignment) const {
-        u64 iterator = start;
-        while (iterator + size < end) {
-            const u64 try_left = Common::AlignUp(iterator, alignment);
+        u64 iterator = Common::AlignUp(start, alignment);
+        while (iterator + size <= end) {
+            const u64 try_left = iterator;
             const u64 try_right = try_left + size;
 
             bool overlap = false;
@@ -100,7 +96,7 @@ private:
                 const auto [commit_left, commit_right] = commit->interval;
                 if (try_left < commit_right && commit_left < try_right) {
                     // There's an overlap, continue the search where the overlapping commit ends.
-                    iterator = commit_right;
+                    iterator = Common::AlignUp(commit_right, alignment);
                     overlap = true;
                     break;
                 }
@@ -110,6 +106,7 @@ private:
                 return try_left;
             }
         }
+
         // No free regions where found, return an empty optional.
         return std::nullopt;
     }
@@ -117,12 +114,8 @@ private:
     const VKDevice& device;                   ///< Vulkan device.
     const vk::DeviceMemory memory;            ///< Vulkan memory allocation handler.
     const vk::MemoryPropertyFlags properties; ///< Vulkan properties.
-    const u64 alloc_size;                     ///< Size of this allocation.
+    const u64 allocation_size;                ///< Size of this allocation.
     const u32 shifted_type;                   ///< Stored Vulkan type of this allocation, shifted.
-    const bool is_mappable;                   ///< Whether the allocation is mappable.
-
-    /// Base address of the mapped pointer.
-    u8* base_address{};
 
     /// Hints where the next free region is likely going to be.
     u64 free_iterator{};
@@ -132,13 +125,15 @@ private:
 };
 
 VKMemoryManager::VKMemoryManager(const VKDevice& device)
-    : device{device}, props{device.GetPhysical().getMemoryProperties(device.GetDispatchLoader())},
-      is_memory_unified{GetMemoryUnified(props)} {}
+    : device{device}, properties{device.GetPhysical().getMemoryProperties(
+                          device.GetDispatchLoader())},
+      is_memory_unified{GetMemoryUnified(properties)} {}
 
 VKMemoryManager::~VKMemoryManager() = default;
 
-VKMemoryCommit VKMemoryManager::Commit(const vk::MemoryRequirements& reqs, bool host_visible) {
-    ASSERT(reqs.size < ALLOC_CHUNK_SIZE);
+VKMemoryCommit VKMemoryManager::Commit(const vk::MemoryRequirements& requirements,
+                                       bool host_visible) {
+    const u64 chunk_size = GetAllocationChunkSize(requirements.size);
 
     // When a host visible commit is asked, search for host visible and coherent, otherwise search
     // for a fast device local type.
@@ -147,32 +142,21 @@ VKMemoryCommit VKMemoryManager::Commit(const vk::MemoryRequirements& reqs, bool
             ? vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent
             : vk::MemoryPropertyFlagBits::eDeviceLocal;
 
-    const auto TryCommit = [&]() -> VKMemoryCommit {
-        for (auto& alloc : allocs) {
-            if (!alloc->IsCompatible(wanted_properties, reqs.memoryTypeBits))
-                continue;
-
-            if (auto commit = alloc->Commit(reqs.size, reqs.alignment); commit) {
-                return commit;
-            }
-        }
-        return {};
-    };
-
-    if (auto commit = TryCommit(); commit) {
+    if (auto commit = TryAllocCommit(requirements, wanted_properties)) {
         return commit;
     }
 
     // Commit has failed, allocate more memory.
-    if (!AllocMemory(wanted_properties, reqs.memoryTypeBits, ALLOC_CHUNK_SIZE)) {
-        // TODO(Rodrigo): Try to use host memory.
-        LOG_CRITICAL(Render_Vulkan, "Ran out of memory!");
-        UNREACHABLE();
+    if (!AllocMemory(wanted_properties, requirements.memoryTypeBits, chunk_size)) {
+        // TODO(Rodrigo): Handle these situations in some way like flushing to guest memory.
+        // Allocation has failed, panic.
+        UNREACHABLE_MSG("Ran out of VRAM!");
+        return {};
     }
 
     // Commit again, this time it won't fail since there's a fresh allocation above. If it does,
     // there's a bug.
-    auto commit = TryCommit();
+    auto commit = TryAllocCommit(requirements, wanted_properties);
     ASSERT(commit);
     return commit;
 }
@@ -180,8 +164,7 @@ VKMemoryCommit VKMemoryManager::Commit(const vk::MemoryRequirements& reqs, bool
 VKMemoryCommit VKMemoryManager::Commit(vk::Buffer buffer, bool host_visible) {
     const auto dev = device.GetLogical();
     const auto& dld = device.GetDispatchLoader();
-    const auto requeriments = dev.getBufferMemoryRequirements(buffer, dld);
-    auto commit = Commit(requeriments, host_visible);
+    auto commit = Commit(dev.getBufferMemoryRequirements(buffer, dld), host_visible);
     dev.bindBufferMemory(buffer, commit->GetMemory(), commit->GetOffset(), dld);
     return commit;
 }
@@ -189,25 +172,23 @@ VKMemoryCommit VKMemoryManager::Commit(vk::Buffer buffer, bool host_visible) {
 VKMemoryCommit VKMemoryManager::Commit(vk::Image image, bool host_visible) {
     const auto dev = device.GetLogical();
     const auto& dld = device.GetDispatchLoader();
-    const auto requeriments = dev.getImageMemoryRequirements(image, dld);
-    auto commit = Commit(requeriments, host_visible);
+    auto commit = Commit(dev.getImageMemoryRequirements(image, dld), host_visible);
     dev.bindImageMemory(image, commit->GetMemory(), commit->GetOffset(), dld);
     return commit;
 }
 
 bool VKMemoryManager::AllocMemory(vk::MemoryPropertyFlags wanted_properties, u32 type_mask,
                                   u64 size) {
-    const u32 type = [&]() {
-        for (u32 type_index = 0; type_index < props.memoryTypeCount; ++type_index) {
-            const auto flags = props.memoryTypes[type_index].propertyFlags;
+    const u32 type = [&] {
+        for (u32 type_index = 0; type_index < properties.memoryTypeCount; ++type_index) {
+            const auto flags = properties.memoryTypes[type_index].propertyFlags;
             if ((type_mask & (1U << type_index)) && (flags & wanted_properties)) {
                 // The type matches in type and in the wanted properties.
                 return type_index;
             }
         }
-        LOG_CRITICAL(Render_Vulkan, "Couldn't find a compatible memory type!");
-        UNREACHABLE();
-        return 0u;
+        UNREACHABLE_MSG("Couldn't find a compatible memory type!");
+        return 0U;
     }();
 
     const auto dev = device.GetLogical();
@@ -216,19 +197,33 @@ bool VKMemoryManager::AllocMemory(vk::MemoryPropertyFlags wanted_properties, u32
     // Try to allocate found type.
     const vk::MemoryAllocateInfo memory_ai(size, type);
     vk::DeviceMemory memory;
-    if (const vk::Result res = dev.allocateMemory(&memory_ai, nullptr, &memory, dld);
+    if (const auto res = dev.allocateMemory(&memory_ai, nullptr, &memory, dld);
         res != vk::Result::eSuccess) {
         LOG_CRITICAL(Render_Vulkan, "Device allocation failed with code {}!", vk::to_string(res));
         return false;
     }
-    allocs.push_back(
+    allocations.push_back(
         std::make_unique<VKMemoryAllocation>(device, memory, wanted_properties, size, type));
     return true;
 }
 
-/*static*/ bool VKMemoryManager::GetMemoryUnified(const vk::PhysicalDeviceMemoryProperties& props) {
-    for (u32 heap_index = 0; heap_index < props.memoryHeapCount; ++heap_index) {
-        if (!(props.memoryHeaps[heap_index].flags & vk::MemoryHeapFlagBits::eDeviceLocal)) {
+VKMemoryCommit VKMemoryManager::TryAllocCommit(const vk::MemoryRequirements& requirements,
+                                               vk::MemoryPropertyFlags wanted_properties) {
+    for (auto& allocation : allocations) {
+        if (!allocation->IsCompatible(wanted_properties, requirements.memoryTypeBits)) {
+            continue;
+        }
+        if (auto commit = allocation->Commit(requirements.size, requirements.alignment)) {
+            return commit;
+        }
+    }
+    return {};
+}
+
+/*static*/ bool VKMemoryManager::GetMemoryUnified(
+    const vk::PhysicalDeviceMemoryProperties& properties) {
+    for (u32 heap_index = 0; heap_index < properties.memoryHeapCount; ++heap_index) {
+        if (!(properties.memoryHeaps[heap_index].flags & vk::MemoryHeapFlagBits::eDeviceLocal)) {
             // Memory is considered unified when heaps are device local only.
             return false;
         }
@@ -236,17 +231,28 @@ bool VKMemoryManager::AllocMemory(vk::MemoryPropertyFlags wanted_properties, u32
     return true;
 }
 
-VKMemoryCommitImpl::VKMemoryCommitImpl(VKMemoryAllocation* allocation, vk::DeviceMemory memory,
-                                       u8* data, u64 begin, u64 end)
-    : interval(std::make_pair(begin, end)), memory{memory}, allocation{allocation}, data{data} {}
+VKMemoryCommitImpl::VKMemoryCommitImpl(const VKDevice& device, VKMemoryAllocation* allocation,
+                                       vk::DeviceMemory memory, u64 begin, u64 end)
+    : device{device}, interval{begin, end}, memory{memory}, allocation{allocation} {}
 
 VKMemoryCommitImpl::~VKMemoryCommitImpl() {
     allocation->Free(this);
 }
 
-u8* VKMemoryCommitImpl::GetData() const {
-    ASSERT_MSG(data != nullptr, "Trying to access an unmapped commit.");
-    return data;
+MemoryMap VKMemoryCommitImpl::Map(u64 size, u64 offset_) const {
+    const auto dev = device.GetLogical();
+    const auto address = reinterpret_cast<u8*>(
+        dev.mapMemory(memory, interval.first + offset_, size, {}, device.GetDispatchLoader()));
+    return MemoryMap{this, address};
+}
+
+void VKMemoryCommitImpl::Unmap() const {
+    const auto dev = device.GetLogical();
+    dev.unmapMemory(memory, device.GetDispatchLoader());
+}
+
+MemoryMap VKMemoryCommitImpl::Map() const {
+    return Map(interval.second - interval.first);
 }
 
 } // namespace Vulkan
diff --git a/src/video_core/renderer_vulkan/vk_memory_manager.h b/src/video_core/renderer_vulkan/vk_memory_manager.h
index 073597b35..cd00bb91b 100644
--- a/src/video_core/renderer_vulkan/vk_memory_manager.h
+++ b/src/video_core/renderer_vulkan/vk_memory_manager.h
@@ -12,6 +12,7 @@
 
 namespace Vulkan {
 
+class MemoryMap;
 class VKDevice;
 class VKMemoryAllocation;
 class VKMemoryCommitImpl;
@@ -21,13 +22,14 @@ using VKMemoryCommit = std::unique_ptr<VKMemoryCommitImpl>;
 class VKMemoryManager final {
 public:
     explicit VKMemoryManager(const VKDevice& device);
+    VKMemoryManager(const VKMemoryManager&) = delete;
     ~VKMemoryManager();
 
     /**
      * Commits a memory with the specified requeriments.
-     * @param reqs Requeriments returned from a Vulkan call.
+     * @param requirements Requirements returned from a Vulkan call.
      * @param host_visible Signals the allocator that it *must* use host visible and coherent
-     * memory. When passing false, it will try to allocate device local memory.
+     *                     memory. When passing false, it will try to allocate device local memory.
      * @returns A memory commit.
      */
     VKMemoryCommit Commit(const vk::MemoryRequirements& reqs, bool host_visible);
@@ -47,25 +49,35 @@ private:
     /// Allocates a chunk of memory.
     bool AllocMemory(vk::MemoryPropertyFlags wanted_properties, u32 type_mask, u64 size);
 
+    /// Tries to allocate a memory commit.
+    VKMemoryCommit TryAllocCommit(const vk::MemoryRequirements& requirements,
+                                  vk::MemoryPropertyFlags wanted_properties);
+
     /// Returns true if the device uses an unified memory model.
-    static bool GetMemoryUnified(const vk::PhysicalDeviceMemoryProperties& props);
+    static bool GetMemoryUnified(const vk::PhysicalDeviceMemoryProperties& properties);
 
-    const VKDevice& device;                                  ///< Device handler.
-    const vk::PhysicalDeviceMemoryProperties props;          ///< Physical device properties.
-    const bool is_memory_unified;                            ///< True if memory model is unified.
-    std::vector<std::unique_ptr<VKMemoryAllocation>> allocs; ///< Current allocations.
+    const VKDevice& device;                              ///< Device handler.
+    const vk::PhysicalDeviceMemoryProperties properties; ///< Physical device properties.
+    const bool is_memory_unified;                        ///< True if memory model is unified.
+    std::vector<std::unique_ptr<VKMemoryAllocation>> allocations; ///< Current allocations.
 };
 
 class VKMemoryCommitImpl final {
     friend VKMemoryAllocation;
+    friend MemoryMap;
 
 public:
-    explicit VKMemoryCommitImpl(VKMemoryAllocation* allocation, vk::DeviceMemory memory, u8* data,
-                                u64 begin, u64 end);
+    explicit VKMemoryCommitImpl(const VKDevice& device, VKMemoryAllocation* allocation,
+                                vk::DeviceMemory memory, u64 begin, u64 end);
     ~VKMemoryCommitImpl();
 
-    /// Returns the writeable memory map. The commit has to be mappable.
-    u8* GetData() const;
+    /// Maps a memory region and returns a pointer to it.
+    /// It's illegal to have more than one memory map at the same time.
+    MemoryMap Map(u64 size, u64 offset = 0) const;
+
+    /// Maps the whole commit and returns a pointer to it.
+    /// It's illegal to have more than one memory map at the same time.
+    MemoryMap Map() const;
 
     /// Returns the Vulkan memory handler.
     vk::DeviceMemory GetMemory() const {
@@ -78,10 +90,46 @@ public:
     }
 
 private:
+    /// Unmaps memory.
+    void Unmap() const;
+
+    const VKDevice& device;           ///< Vulkan device.
     std::pair<u64, u64> interval{};   ///< Interval where the commit exists.
     vk::DeviceMemory memory;          ///< Vulkan device memory handler.
     VKMemoryAllocation* allocation{}; ///< Pointer to the large memory allocation.
-    u8* data{}; ///< Pointer to the host mapped memory, it has the commit offset included.
+};
+
+/// Holds ownership of a memory map.
+class MemoryMap final {
+public:
+    explicit MemoryMap(const VKMemoryCommitImpl* commit, u8* address)
+        : commit{commit}, address{address} {}
+
+    ~MemoryMap() {
+        if (commit) {
+            commit->Unmap();
+        }
+    }
+
+    /// Prematurely releases the memory map.
+    void Release() {
+        commit->Unmap();
+        commit = nullptr;
+    }
+
+    /// Returns the address of the memory map.
+    u8* GetAddress() const {
+        return address;
+    }
+
+    /// Returns the address of the memory map;
+    operator u8*() const {
+        return address;
+    }
+
+private:
+    const VKMemoryCommitImpl* commit{}; ///< Mapped memory commit.
+    u8* address{};                      ///< Address to the mapped memory.
 };
 
 } // namespace Vulkan