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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: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Niklas Söderlund 2016-08-10 13:22:14 +02:00 committed by Vinod Koul
parent 29b4817d40
commit ba409b31b3
1 changed files with 6 additions and 0 deletions
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6
include/linux/dma-mapping.h
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@ -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);