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Commit bec26b11 authored by Liam Mark's avatar Liam Mark
Browse files

staging: android: ion: Add support for dma_buf_vmap 



Currently ION only supports mapping memory from the kernel via
dma_buf_kmap. However dma_buf_kmap only allows mappings of page size and
clients would like an easier way to map the complete ION buffer, so add
support for dma_buf_vmap.

Change-Id: Ibff3c4b83f323676b86f558cf05c5e49d53dc4e9
Signed-off-by: default avatarLiam Mark <lmark@codeaurora.org>
parent 8887fcbe

drivers/staging/android/ion/ion.c

+13 −0
Original line number Diff line number Diff line
@@ -435,6 +435,17 @@ static void ion_dma_buf_kunmap(struct dma_buf *dmabuf, unsigned long offset, 
{

}



static void *ion_dma_buf_vmap(struct dma_buf *dmabuf)

{

	struct ion_buffer *buffer = dmabuf->priv;



	return buffer->vaddr;

}



static void ion_dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr)

{

}



static void ion_sgl_sync_range(struct device *dev, struct scatterlist *sgl,

			       unsigned int nents, unsigned long offset,

			       unsigned long length,
@@ -646,6 +657,8 @@ static const struct dma_buf_ops dma_buf_ops = { 
	.unmap_atomic = ion_dma_buf_kunmap,

	.map = ion_dma_buf_kmap,

	.unmap = ion_dma_buf_kunmap,

	.vmap = ion_dma_buf_vmap,

	.vunmap = ion_dma_buf_vunmap,

	.get_flags = ion_dma_buf_get_flags,

};