[dxvk] Reimplement sparse buffer support

src/dxvk/dxvk_buffer.cpp

@@ -64,4 +64,9 @@ namespace dxvk {
     return &entry.first->second;
   }
 
+
+  DxvkSparsePageTable* DxvkBuffer::getSparsePageTable() {
+    return m_storage->getSparsePageTable();
+  }
+  
 }

src/dxvk/dxvk_buffer.h

@@ -384,6 +384,12 @@ namespace dxvk {
     Rc<DxvkBufferView> createView(
       const DxvkBufferViewCreateInfo& info);
 
+    /**
+     * \brief Retrieves sparse binding table
+     * \returns Sparse binding table
+     */
+    DxvkSparsePageTable* getSparsePageTable();
+
   private:
 
     Rc<vk::DeviceFn>            m_vkd;

src/dxvk/dxvk_image.cpp

@@ -215,6 +215,11 @@ namespace dxvk {
   }
 
 
+  DxvkSparsePageTable* DxvkImage::getSparsePageTable() {
+    return &m_sparsePageTable;
+  }
+
+
   DxvkImageView::DxvkImageView(
     const Rc<vk::DeviceFn>&         vkd,
     const Rc<DxvkImage>&            image,

src/dxvk/dxvk_image.h

@@ -331,6 +331,12 @@ namespace dxvk {
      */
     HANDLE sharedHandle() const;
 
+    /**
+     * \brief Retrives sparse page table
+     * \returns Page table
+     */
+    DxvkSparsePageTable* getSparsePageTable();
+
   private:
     
     Rc<vk::DeviceFn>      m_vkd;
@@ -339,6 +345,8 @@ namespace dxvk {
     VkMemoryPropertyFlags m_memFlags;
     DxvkPhysicalImage     m_image;
 
+    DxvkSparsePageTable   m_sparsePageTable;
+
     bool m_shared = false;
 
     small_vector<VkFormat, 4> m_viewFormats;

src/dxvk/dxvk_memory.cpp

@@ -758,7 +758,7 @@ namespace dxvk {
         logMemoryStats();
       }
     } else {
-      // TODO implement sparse
+      allocation = createAllocation(new DxvkSparsePageTable(m_device, createInfo, buffer));
     }
 
     if (!allocation) {
@@ -1102,6 +1102,15 @@ namespace dxvk {
   }
 
 
+  DxvkResourceAllocation* DxvkMemoryAllocator::createAllocation(
+          DxvkSparsePageTable*  sparsePageTable) {
+    auto allocation = m_allocationPool.create(this, nullptr);
+    allocation->m_sparsePageTable = sparsePageTable;
+
+    return allocation;
+  }
+
+
   DxvkResourceAllocation* DxvkMemoryAllocator::createAllocation(
           DxvkMemoryType&       type,
     const DxvkDeviceMemory&     memory) {

src/dxvk/dxvk_memory.h

@@ -1279,6 +1279,9 @@ namespace dxvk {
             DxvkMemoryType&       type,
       const DxvkDeviceMemory&     memory);
 
+    DxvkResourceAllocation* createAllocation(
+            DxvkSparsePageTable*  sparsePageTable);
+
     bool refillAllocationCache(
             DxvkLocalAllocationCache* cache,
       const VkMemoryRequirements& requirements,

src/dxvk/dxvk_sparse.cpp

@@ -182,9 +182,10 @@ namespace dxvk {
 
   DxvkSparsePageTable::DxvkSparsePageTable(
           DxvkDevice*             device,
-    const DxvkBuffer*             buffer)
-  : m_buffer(buffer) {
-    VkDeviceSize bufferSize = buffer->info().size;
+    const VkBufferCreateInfo&     bufferInfo,
+          VkBuffer                bufferHandle)
+  : m_buffer(bufferHandle) {
+    VkDeviceSize bufferSize = bufferInfo.size;
 
     // For linear buffers, the mapping is very simple
     // and consists of consecutive 64k pages
@@ -357,7 +358,7 @@ namespace dxvk {
 
 
   VkBuffer DxvkSparsePageTable::getBufferHandle() const {
-    return m_buffer ? m_buffer->getSliceHandle().handle : VK_NULL_HANDLE;
+    return m_buffer;
   }
 
 

src/dxvk/dxvk_sparse.h

@@ -331,7 +331,8 @@ namespace dxvk {
 
     DxvkSparsePageTable(
             DxvkDevice*             device,
-      const DxvkBuffer*             buffer);
+      const VkBufferCreateInfo&     bufferInfo,
+            VkBuffer                bufferHandle);
 
     DxvkSparsePageTable(
             DxvkDevice*             device,
@@ -455,7 +456,8 @@ namespace dxvk {
 
   private:
 
-    const DxvkBuffer* m_buffer  = nullptr;
+    VkBuffer m_buffer = VK_NULL_HANDLE;
+
     const DxvkImage* m_image = nullptr;
 
     DxvkSparseImageProperties                         m_properties    = { };
@@ -478,17 +480,12 @@ namespace dxvk {
 
     /**
      * \brief Queries sparse page table
+     *
+     * Should be removed once storage objects can
+     * be retrieved from resources diectly.
      * \returns Sparse page table, if defined
      */
-    DxvkSparsePageTable* getSparsePageTable() {
-      return m_sparsePageTable
-        ? &m_sparsePageTable
-        : nullptr;
-    }
-
-  protected:
-
-    DxvkSparsePageTable m_sparsePageTable;
+    virtual DxvkSparsePageTable* getSparsePageTable() = 0;
 
   };