Messages in this thread Patch in this message | | | From | Niklas Söderlund <> | Subject | [PATCH v5 2/9] dma-mapping: add {map,unmap}_resource to dma_map_ops | Date | Tue, 8 Mar 2016 03:42:47 +0100 |
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Add methods to handle mapping of device resources from a physical address. This is needed for example to be able to map MMIO FIFO registers to a IOMMU.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> --- include/linux/dma-mapping.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 75857cd..e3aba4e 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -49,6 +49,12 @@ struct dma_map_ops { struct scatterlist *sg, int nents, enum dma_data_direction dir, struct dma_attrs *attrs); + dma_addr_t (*map_resource)(struct device *dev, phys_addr_t phys_addr, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs); + void (*unmap_resource)(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs); void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir); -- 2.7.2
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