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65 lines
1.7 KiB
65 lines
1.7 KiB
/*
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* Copyright 2024 Rockchip Electronics Co. LTD
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.00
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include "C2RKDmaBufSync.h"
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typedef unsigned long long __u64;
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typedef unsigned int __u32;
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struct dma_heap_allocation_data {
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__u64 len;
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__u32 fd;
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__u32 fd_flags;
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__u64 heap_flags;
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};
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#define DMA_HEAP_IOC_MAGIC 'H'
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#define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\
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struct dma_heap_allocation_data)
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#define DMA_BUF_SYNC_READ (1 << 0)
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#define DMA_BUF_SYNC_WRITE (2 << 0)
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#define DMA_BUF_SYNC_RW (DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE)
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#define DMA_BUF_SYNC_START (0 << 2)
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#define DMA_BUF_SYNC_END (1 << 2)
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struct dma_buf_sync {
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__u64 flags;
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};
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#define DMA_BUF_BASE 'b'
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#define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync)
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int dma_sync_device_to_cpu(int fd) {
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struct dma_buf_sync sync = {0};
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sync.flags = DMA_BUF_SYNC_START | DMA_BUF_SYNC_RW;
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return ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
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}
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int dma_sync_cpu_to_device(int fd) {
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struct dma_buf_sync sync = {0};
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sync.flags = DMA_BUF_SYNC_END | DMA_BUF_SYNC_RW;
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return ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
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}
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