DMA_BUF_MMAP - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Device drivers infrastructure

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NAMEdma_buf_mmap − Setup up a userspace mmap with the given vma

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SYNOPSISint dma_buf_mmap(struct dma_buf * dmabuf, struct vm_area_struct * vma, unsigned long pgoff);

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ARGUMENTSdmabuf [in] buffer that should back the vma vma [in] vma for the mmap pgoff [in] offset in pages where this mmap should start within the dma−buf buffer​.

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DESCRIPTIONThis function adjusts the passed in vma so that it points at the file of the dma_buf operation​. It also adjusts the starting pgoff and does bounds checking on the size of the vma​. Then it calls the exporters mmap function to set up the mapping​. Can return negative error values, returns 0 on success​.

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