Re: [Xen-devel] linux-next: manual merge of the xen-tip tree with the tree

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Looks fine thanks!
Just an heads up: I'll be updating the Xen code below soon so this
conflict might come up again.

On Wed, 30 Oct 2013, Stephen Rothwell wrote:
> Hi all,
> 
> Today's linux-next merge of the xen-tip tree got a conflict in
> arch/arm/include/asm/dma-mapping.h between commit 223016339ce7 ("ARM:
> 7805/1: mm: change max*pfn to include the physical offset of memory")
> from the arm tree and commit 06e6295bcece ("arm: make SWIOTLB available")
> from the xen-tip tree.
> 
> I fixed it up (see below) and can carry the fix as necessary (no action
> is required).
> 
> -- 
> Cheers,
> Stephen Rothwell                    sfr@xxxxxxxxxxxxxxxx
> 
> diff --cc arch/arm/include/asm/dma-mapping.h
> index 863cd84eb1a2,f5945d4e4e9f..000000000000
> --- a/arch/arm/include/asm/dma-mapping.h
> +++ b/arch/arm/include/asm/dma-mapping.h
> @@@ -87,13 -98,42 +99,49 @@@ static inline dma_addr_t virt_to_dma(st
>   }
>   #endif
>   
>  +/* The ARM override for dma_max_pfn() */
>  +static inline unsigned long dma_max_pfn(struct device *dev)
>  +{
>  +    return PHYS_PFN_OFFSET + dma_to_pfn(dev, *dev->dma_mask);
>  +}
>  +#define dma_max_pfn(dev) dma_max_pfn(dev)
>  +
> + static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
> + {
> +     unsigned int offset = paddr & ~PAGE_MASK;
> +     return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
> + }
> + 
> + static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t 
> dev_addr)
> + {
> +     unsigned int offset = dev_addr & ~PAGE_MASK;
> +     return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
> + }
> + 
> + static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t 
> size)
> + {
> +     u64 limit, mask;
> +     
> +     if (dev->dma_mask)
> +             mask = *dev->dma_mask;
> +     else 
> +             mask = dev->coherent_dma_mask;
> + 
> +     if (mask == 0)
> +             return 0;
> + 
> +     limit = (mask + 1) & ~mask;
> +     if (limit && size > limit)
> +             return 0;
> + 
> +     if ((addr | (addr + size - 1)) & ~mask)
> +             return 0;
> + 
> +     return 1;
> + }
> + 
> + static inline void dma_mark_clean(void *addr, size_t size) { }
> + 
>   /*
>    * DMA errors are defined by all-bits-set in the DMA address.
>    */
> 

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