32 lines
784 B
C
32 lines
784 B
C
#ifndef __RK_DMABUF_H__
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#define __RK_DMABUF_H__
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#include <stdint.h>
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#include <sys/mman.h>
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#include "linux4.19/dma-buf.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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int dmabuf_sync(int fd, uint64_t flags);
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int dmabuf_sync_partial(int fd, uint32_t offset, uint32_t len, uint64_t flags);
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off_t dmabuf_get_size(int fd);
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void* dmabuf_mmap(int fd, off_t offset, size_t len);
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/*
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申请dmabuf内存
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is_cma 是否申请CMA heap内存，若为false则申请SYSTEM heap内存
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is_cacheable 申请的内存是否支持cache
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is_dma32 申请的内存是否限制地址在4G以内
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fd 存放返回的dmabuf fd
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成功 返回0
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失败 返回负值
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*/
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int dmabuf_alloc(uint32_t len, bool is_cma, bool is_cacheable, bool is_dma32, int *fd);
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#ifdef __cplusplus
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}
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#endif
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#endif |