[LLM] First commit the llm deployment code

custom_ops/gpu_ops/get_data_ptr_ipc.cu

@@ -0,0 +1,62 @@
+// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed 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.
+
+#include "cuda_multiprocess.h"
+#include "helper.h"
+
+namespace {
+int sharedMemoryOpen(const char *name, size_t sz, sharedMemoryInfo *info) {
+    info->size = sz;
+    info->shmFd = shm_open(name, O_RDWR, 0777);
+    if (info->shmFd < 0) {
+        return errno;
+    }
+
+    info->addr =
+        mmap(0, sz, PROT_READ | PROT_WRITE, MAP_SHARED, info->shmFd, 0);
+    if (info->addr == NULL) {
+        return errno;
+    }
+
+    return 0;
+}
+}  // namespace
+
+std::vector<paddle::Tensor> GetDataPtrIpc(const paddle::Tensor &tmp_input,
+                                          const std::string &shm_name) {
+    auto out_data_ptr_tensor =
+        paddle::full({1}, 0, paddle::DataType::INT64, paddle::CPUPlace());
+    auto out_data_ptr_tensor_ptr = out_data_ptr_tensor.data<int64_t>();
+    volatile shmStruct *shm = NULL;
+    sharedMemoryInfo info;
+    if (sharedMemoryOpen(shm_name.c_str(), sizeof(shmStruct), &info) != 0) {
+        printf("Failed to create shared memory slab\n");
+        printf("Func GetDataPtrIpc. Shm_name: %s\n", shm_name.c_str());
+        exit(EXIT_FAILURE);
+    }
+    shm = (volatile shmStruct *)info.addr;
+    void *ptr = nullptr;
+    checkCudaErrors(cudaIpcOpenMemHandle(&ptr,
+                                         *(cudaIpcMemHandle_t *)&shm->memHandle,
+                                         cudaIpcMemLazyEnablePeerAccess));
+
+    out_data_ptr_tensor_ptr[0] = reinterpret_cast<int64_t>(ptr);
+    return {out_data_ptr_tensor};
+}
+
+PD_BUILD_STATIC_OP(get_data_ptr_ipc)
+    .Inputs({"tmp_input"})
+    .Attrs({"shm_name: std::string"})
+    .Outputs({"data_ptr"})
+    .SetKernelFn(PD_KERNEL(GetDataPtrIpc));