chore: import upstream snapshot with attribution

2026-07-13 13:36:25 +08:00
commit 26446540fa
3151 changed files with 974126 additions and 0 deletions
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+#ifndef TVM_RUNTIME_VM_TENSOR_CACHE_SUPPORT_H_
+#define TVM_RUNTIME_VM_TENSOR_CACHE_SUPPORT_H_
+
+#include <tvm/ffi/container/array.h>
+#include <tvm/ffi/function.h>
+#include <tvm/runtime/tensor.h>
+
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+namespace tvm {
+namespace runtime {
+namespace vm {
+
+/*!
+ * \brief Metadata for Tensor cache, which by default, is named as "tensor-cache.json".
+ */
+struct TensorCacheMetadata {
+  /*! \brief Each shard of Tensor cache, which by default, is named as "params_shard_x.bin". */
+  struct FileRecord {
+    /*! \brief Metadata of each parameter */
+    struct ParamRecord {
+      /*!
+       * \brief Load the parameter from raw data.
+       * \param device The device to load the parameter onto.
+       * \param raw_data The raw data stream
+       * \param staging_buffer The buffer to be used to avoid extra OpenCL copies. Pass in a nullptr
+       * in other cases
+       */
+      TVM_RUNTIME_DLL Tensor Load(Device device, const std::string* raw_data,
+                                  ffi::Optional<Tensor>* staging_buffer = nullptr) const;
+
+      /*! \brief Name of the parameter */
+      std::string name;
+      /*! \brief Shape of the parameter */
+      ffi::Shape shape;
+      /*! \brief Data type of the parameter */
+      DLDataType dtype;
+      /*! \brief Format of the parameter */
+      std::string format;
+      /*! \brief Number of bytes */
+      int64_t nbytes;
+      /*! \brief Offset from the raw stream */
+      int64_t byte_offset;
+    };
+
+    /*! \brief Load a FileRecord into memory */
+    TVM_RUNTIME_DLL ffi::Array<Tensor> Load(Device device,                   //
+                                            const std::string& path_prefix,  //
+                                            std::string* raw_data_buffer,    //
+                                            ffi::Optional<Tensor>* staging_buffer = nullptr) const;
+
+    /*! \brief Relative path to the bin file */
+    std::string data_path;
+    /*! \brief Format of the file */
+    std::string format;
+    /*! \brief Size of the file */
+    int64_t nbytes;
+    /*! \brief The parameters in the file */
+    std::vector<ParamRecord> records;
+  };
+  /*! \brief The files in the Tensor cache */
+  std::vector<FileRecord> records;
+  /*! \brief The path to the `tensor-cache.json` file */
+  std::string path;
+
+  /*! \brief Load the metadata from a specific directory */
+  TVM_RUNTIME_DLL static TensorCacheMetadata Load(const std::string& path);
+  /*! \brief Load the metadata from a given JSON string */
+  TVM_RUNTIME_DLL static TensorCacheMetadata LoadFromStr(const std::string& json_str,
+                                                         const std::string& path);
+};
+
+}  // namespace vm
+}  // namespace runtime
+}  // namespace tvm
+
+#endif  // TVM_RUNTIME_VM_TENSOR_CACHE_SUPPORT_H_