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+rene...@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinch...@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 c44f8ee..e3bd27f 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -95,6 +95,12 @@ struct dma_map_ops {
struct scatterlist *sg, int nents,
enum dma_data_direction dir,
unsigned long attrs);
+ dma_addr_t (*map_resource)(struct device *dev, phys_addr_t phys_addr,
+ size_t size, enum dma_data_direction dir,
+ unsigned long attrs);
+ void (*unmap_resource)(struct device *dev, dma_addr_t dma_handle,
+ size_t size, enum dma_data_direction dir,
+ unsigned long attrs);
void (*sync_single_for_cpu)(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir);
--
2.9.2
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