1 /* 2 * Copyright (c) 2020 HiSilicon (Shanghai) Technologies CO., LIMITED. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef _LINUX_DMA_DIRECTION_H 16 #define _LINUX_DMA_DIRECTION_H 17 18 #ifdef __cplusplus 19 extern "C" { 20 #endif /* __cplusplus */ 21 22 /* 23 * These definitions mirror those in pci.h, so they can be used 24 * interchangeably with their PCI_ counterparts. 25 */ 26 #define DMA_BIDIRECTIONAL 0 27 #define DMA_TO_DEVICE 1 28 #define DMA_FROM_DEVICE 2 29 #define DMA_NONE 3 30 31 #ifdef __cplusplus 32 } 33 #endif /* __cplusplus */ 34 35 #endif /* _LINUX_DMA_DIRECTION_H */ 36