Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ba409b31 authored by Niklas Söderlund's avatar Niklas Söderlund Committed by Vinod Koul
Browse files

dma-mapping: add {map,unmap}_resource to dma_map_ops 



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: default avatarNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 29b4817d

include/linux/dma-mapping.h

+6 −0
Original line number Original line Diff line number Diff line
@@ -95,6 +95,12 @@ struct dma_map_ops { 
			 struct scatterlist *sg, int nents,

			 struct scatterlist *sg, int nents,

			 enum dma_data_direction dir,

			 enum dma_data_direction dir,

			 unsigned long attrs);

			 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,

	void (*sync_single_for_cpu)(struct device *dev,

				    dma_addr_t dma_handle, size_t size,

				    dma_addr_t dma_handle, size_t size,

				    enum dma_data_direction dir);

				    enum dma_data_direction dir);