From: Milton Miller <[email protected]> If an architecture sets ARCH_HAS_DMA_GET_REQUIRED_MASK and has settable dma_map_ops, the required mask may change by the ops implementation. For example, a system that always has an mmu inline may only require 32 bits while a swiotlb would desire bits to cover all of memory.
Therefore add the field if the architecture does not use the generic definition of dma_get_required_mask. The first use will by by powerpc. Note that this does add some dependency on the order in which files are visible here. Signed-off-by: Milton Miller <[email protected]> Signed-off-by: Nishanth Aravamudan <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] --- include/linux/dma-mapping.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index ba8319a..d0e023b 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -49,6 +49,9 @@ struct dma_map_ops { int (*mapping_error)(struct device *dev, dma_addr_t dma_addr); int (*dma_supported)(struct device *dev, u64 mask); int (*set_dma_mask)(struct device *dev, u64 mask); +#ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK + u64 (*get_required_mask)(struct device *dev); +#endif int is_phys; }; -- 1.7.4.1 _______________________________________________ Linuxppc-dev mailing list [email protected] https://lists.ozlabs.org/listinfo/linuxppc-dev
