From: Laurentiu Tudor <laurentiu.tu...@nxp.com> Introduce a new dma map op called dma_addr_to_phys_addr() that converts a dma address to the physical address backing it up and add wrapper for it.
Signed-off-by: Laurentiu Tudor <laurentiu.tu...@nxp.com> --- include/linux/dma-mapping.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 4a1c4fca475a..5965d159c9a9 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -132,6 +132,8 @@ struct dma_map_ops { u64 (*get_required_mask)(struct device *dev); size_t (*max_mapping_size)(struct device *dev); unsigned long (*get_merge_boundary)(struct device *dev); + phys_addr_t (*dma_addr_to_phys_addr)(struct device *dev, + dma_addr_t dma_handle); }; #define DMA_MAPPING_ERROR (~(dma_addr_t)0) @@ -442,6 +444,19 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) return 0; } +static inline phys_addr_t dma_addr_to_phys_addr(struct device *dev, + dma_addr_t dma_handle) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + if (dma_is_direct(ops)) + return (phys_addr_t)dma_handle; + else if (ops->dma_addr_to_phys_addr) + return ops->dma_addr_to_phys_addr(dev, dma_handle); + + return 0; +} + void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs); void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr, @@ -578,6 +593,12 @@ static inline unsigned long dma_get_merge_boundary(struct device *dev) { return 0; } + +static inline phys_addr_t dma_addr_to_phys_addr(struct device *dev, + dma_addr_t dma_handle) +{ + return 0; +} #endif /* CONFIG_HAS_DMA */ static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr, -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu