1 /* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 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 16 #ifndef LIB_DMA_BUF_HEAP_H 17 #define LIB_DMA_BUF_HEAP_H 18 19 #include <stdlib.h> 20 #include <linux/dma-buf.h> 21 #include <linux/dma-heap.h> 22 23 #undef LOG_TAG 24 #define LOG_TAG "dmabufheap" 25 26 #ifdef __cplusplus 27 #if __cplusplus 28 extern "C" { 29 #endif /* End of #if __cplusplus */ 30 #endif /* End of #ifdef __cplusplus */ 31 32 typedef enum { 33 DMA_BUF_HEAP_BUF_SYNC_RW = DMA_BUF_SYNC_RW, 34 DMA_BUF_HEAP_BUF_SYNC_READ = DMA_BUF_SYNC_READ, 35 DMA_BUF_HEAP_BUF_SYNC_WRITE = DMA_BUF_SYNC_WRITE, 36 } DmabufHeapBufferSyncType; 37 38 typedef struct { 39 unsigned int fd; 40 size_t size; 41 unsigned int heapFlags; 42 } DmabufHeapBuffer; 43 44 int DmabufHeapOpen(const char *heapName); 45 46 int DmabufHeapClose(unsigned int fd); 47 48 int DmabufHeapBufferAlloc(unsigned int heapFd, DmabufHeapBuffer *buffer); 49 50 int DmabufHeapBufferFree(DmabufHeapBuffer *buffer); 51 52 int DmabufHeapBufferSyncStart(unsigned int bufferFd, DmabufHeapBufferSyncType syncType); 53 54 int DmabufHeapBufferSyncEnd(unsigned int bufferFd, DmabufHeapBufferSyncType syncType); 55 56 #ifdef __cplusplus 57 #if __cplusplus 58 } 59 #endif /* End of #if __cplusplus */ 60 #endif /* End of #ifdef __cplusplus */ 61 62 #endif /* LIB_DMA_BUF_HEAP_H */