swiotlb: Introduce swiotlb_max_mapping_size()

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The function returns the maximum size that can be remapped
by the SWIOTLB implementation. This function will be later
exposed to users through the DMA-API.

Cc: stable@vger.kernel.org
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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Joerg Roedel 2019-02-07 12:59:13 +01:00 • committed by Michael S. Tsirkin

parent 1c163f4c7b

commit abe420bfae

2 changed files with 10 additions and 0 deletions

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5

include/linux/swiotlb.h

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5

kernel/dma/swiotlb.c

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