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dma-buf: Update [un]map documentation to match the other functions
Other function have inline documentation, a couple still have theirs at the top of the structure, update the docs and move them inline. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190321200957.16938-2-afd@ti.com
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1 changed files with 25 additions and 4 deletions
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@ -39,8 +39,6 @@ struct dma_buf_attachment;
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/**
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* struct dma_buf_ops - operations possible on struct dma_buf
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* @map: [optional] maps a page from the buffer into kernel address space.
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* @unmap: [optional] unmaps a page from the buffer.
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* @vmap: [optional] creates a virtual mapping for the buffer into kernel
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* address space. Same restrictions as for vmap and friends apply.
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* @vunmap: [optional] unmaps a vmap from the buffer
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@ -200,8 +198,6 @@ struct dma_buf_ops {
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* to be restarted.
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*/
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int (*end_cpu_access)(struct dma_buf *, enum dma_data_direction);
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void *(*map)(struct dma_buf *, unsigned long);
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void (*unmap)(struct dma_buf *, unsigned long, void *);
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/**
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* @mmap:
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@ -240,6 +236,31 @@ struct dma_buf_ops {
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*/
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int (*mmap)(struct dma_buf *, struct vm_area_struct *vma);
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/**
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* @map:
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*
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* Maps a page from the buffer into kernel address space. The page is
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* specified by offset into the buffer in PAGE_SIZE units.
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*
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* This callback is optional.
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*
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* Returns:
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*
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* Virtual address pointer where requested page can be accessed. NULL
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* on error or when this function is unimplemented by the exporter.
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*/
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void *(*map)(struct dma_buf *, unsigned long);
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/**
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* @unmap:
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*
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* Unmaps a page from the buffer. Page offset and address pointer should
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* be the same as the one passed to and returned by matching call to map.
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*
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* This callback is optional.
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*/
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void (*unmap)(struct dma_buf *, unsigned long, void *);
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void *(*vmap)(struct dma_buf *);
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void (*vunmap)(struct dma_buf *, void *vaddr);
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};
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